/builds/wireshark/wireshark/epan/dissectors/packet-http3.c

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/* packet-http3.c

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* Routines for HTTP/3 dissection

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*

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* Wireshark - Network traffic analyzer

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* By Gerald Combs <gerald@wireshark.org>

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*

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* SPDX-License-Identifier: GPL-2.0-or-later

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*/

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/*

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* https://tools.ietf.org/html/draft-ietf-quic-http-29

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* https://tools.ietf.org/html/draft-ietf-quic-qpack-16

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*

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* Depends on the QUIC dissector for providing a reassembled stream of data, see

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* packet-quic.c for details about supported QUIC draft versions.

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* Depends on nghttp3 for HTTP header dissection.

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* Currently supported HTTP/3 versions: h3-23 up to and including h3-29.

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*/

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#include "config.h"

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#define WS_LOG_DOMAIN"HTTP3" "HTTP3"

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#include <stdint.h>

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#include <string.h>

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#include <epan/wmem_scopes.h>

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#include <epan/addr_resolv.h>

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#include <epan/conversation_table.h>

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#include <epan/decode_as.h>

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#include <epan/exceptions.h>

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#include <epan/expert.h>

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#include <epan/follow.h>

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#include <epan/packet.h>

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#include <epan/proto_data.h>

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#include <epan/reassemble.h>

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#include <epan/to_str.h>

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#include <epan/uat.h>

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#include <epan/dissectors/packet-http.h> /* for getting status reason-phrase */

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#include <epan/dissectors/packet-media-type.h>

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#include <epan/dissectors/packet-quic.h>

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#include <epan/dissectors/packet-udp.h>

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#include <wsutil/pint.h>

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#include <wsutil/str_util.h>

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#include <wsutil/ws_assert.h>

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#include <wsutil/zlib_compat.h>

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#include "charsets.h"

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#ifdef HAVE_NGHTTP31

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#include <nghttp3/nghttp3.h>

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#endif

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void proto_reg_handoff_http3(void);

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void proto_register_http3(void);

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static dissector_handle_t http3_handle;

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static dissector_handle_t http3_datagram_handle;

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static int http3_follow_tap;

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#ifdef HAVE_NGHTTP31

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static reassembly_table http3_body_reassembly_table;

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static dissector_table_t media_type_dissector_table;

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/*

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* Decompression of content-encoded entities.

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*/

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#if defined(HAVE_ZLIB1) || defined(HAVE_ZLIBNG) || defined(HAVE_BROTLI1) || defined(HAVE_ZSTD1)

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static bool_Bool http3_decompress_body = true1;

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#else

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static bool_Bool http3_decompress_body;

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#endif

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#endif /* HAVE_NGHTTP3 */

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#define PROTO_DATA_KEY_HEADER0 0

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#define PROTO_DATA_KEY_QPACK1 1

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static int proto_http3;

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static int hf_http3_stream_uni;

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static int hf_http3_stream_uni_type;

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static int hf_http3_stream_bidi;

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static int hf_http3_push_id;

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static int hf_http3_frame;

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static int hf_http3_frame_streamid;

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static int hf_http3_frame_type;

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static int hf_http3_frame_length;

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static int hf_http3_frame_payload;

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static int hf_http3_data;

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static int hf_http3_encoded_entity;

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static int hf_http3_body_fragments;

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static int hf_http3_body_fragment;

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static int hf_http3_body_fragment_overlap;

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static int hf_http3_body_fragment_overlap_conflicts;

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static int hf_http3_body_fragment_multiple_tails;

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static int hf_http3_body_fragment_too_long_fragment;

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static int hf_http3_body_fragment_error;

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static int hf_http3_body_fragment_count;

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static int hf_http3_body_reassembled_in;

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static int hf_http3_body_reassembled_length;

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static int hf_http3_body_reassembled_data;

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static int hf_http3_headers_count;

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static int hf_http3_header;

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static int hf_http3_headers_decoded_length;

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static int hf_http3_header_name_length;

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static int hf_http3_header_name;

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static int hf_http3_header_value_length;

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static int hf_http3_header_value;

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static int hf_http3_header_request_full_uri;

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static int hf_http3_header_qpack_blocked;

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static int hf_http3_header_qpack_blocked_stream_rcint;

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static int hf_http3_header_qpack_blocked_decoder_wicnt;

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#ifdef HAVE_NGHTTP31

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/* Static HTTP3 headers */

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static int hf_http3_headers_status;

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static int hf_http3_headers_path;

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static int hf_http3_headers_protocol;

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static int hf_http3_headers_method;

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static int hf_http3_headers_scheme;

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static int hf_http3_headers_accept;

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static int hf_http3_headers_accept_charset;

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static int hf_http3_headers_accept_encoding;

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static int hf_http3_headers_accept_language;

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static int hf_http3_headers_accept_ranges;

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static int hf_http3_headers_access_control_allow_origin;

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static int hf_http3_headers_age;

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static int hf_http3_headers_allow;

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static int hf_http3_headers_authorization;

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static int hf_http3_headers_authority;

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static int hf_http3_headers_cache_control;

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static int hf_http3_headers_content_disposition;

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static int hf_http3_headers_content_encoding;

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static int hf_http3_headers_content_language;

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static int hf_http3_headers_content_length;

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static int hf_http3_headers_content_location;

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static int hf_http3_headers_content_range;

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static int hf_http3_headers_content_type;

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static int hf_http3_headers_cookie;

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static int hf_http3_headers_date;

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static int hf_http3_headers_etag;

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static int hf_http3_headers_expect;

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static int hf_http3_headers_expires;

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static int hf_http3_headers_from;

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static int hf_http3_headers_if_match;

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static int hf_http3_headers_if_modified_since;

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static int hf_http3_headers_if_none_match;

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static int hf_http3_headers_if_range;

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static int hf_http3_headers_if_unmodified_since;

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static int hf_http3_headers_last_modified;

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static int hf_http3_headers_link;

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static int hf_http3_headers_location;

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static int hf_http3_headers_max_forwards;

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static int hf_http3_headers_proxy_authenticate;

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static int hf_http3_headers_proxy_authorization;

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static int hf_http3_headers_range;

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static int hf_http3_headers_referer;

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static int hf_http3_headers_refresh;

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static int hf_http3_headers_retry_after;

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static int hf_http3_headers_server;

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static int hf_http3_headers_set_cookie;

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static int hf_http3_headers_strict_transport_security;

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static int hf_http3_headers_user_agent;

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static int hf_http3_headers_vary;

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static int hf_http3_headers_via;

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static int hf_http3_headers_www_authenticate;

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#endif

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static int hf_http3_qpack_encoder;

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static int hf_http3_qpack_encoder_icnt;

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static int hf_http3_qpack_encoder_icnt_inc;

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static int hf_http3_qpack_encoder_opcode_insert_indexed;

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static int hf_http3_qpack_encoder_opcode_insert_indexed_ref;

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static int hf_http3_qpack_encoder_opcode_insert_indexed_val;

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static int hf_http3_qpack_encoder_opcode_insert_indexed_hval;

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static int hf_http3_qpack_encoder_opcode_insert;

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static int hf_http3_qpack_encoder_opcode_insert_name;

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static int hf_http3_qpack_encoder_opcode_insert_hname;

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static int hf_http3_qpack_encoder_opcode_insert_val;

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static int hf_http3_qpack_encoder_opcode_insert_hval;

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static int hf_http3_qpack_encoder_opcode_duplicate;

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static int hf_http3_qpack_encoder_opcode_dtable_cap;

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static int hf_http3_qpack_encoder_opcode_dtable_cap_val;

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static int hf_http3_qpack_decoder;

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static int hf_http3_qpack_decoder_opcode_section_ack;

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static int hf_http3_qpack_decoder_opcode_section_ack_stream_id;

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static int hf_http3_qpack_decoder_opcode_cancel_stream;

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static int hf_http3_qpack_decoder_opcode_cancel_stream_id;

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static int hf_http3_qpack_decoder_opcode_icnt_increment;

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static int hf_http3_qpack_decoder_opcode_icnt_increment_value;

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static int hf_http3_settings;

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static int hf_http3_settings_identifier;

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static int hf_http3_settings_value;

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static int hf_http3_settings_qpack_max_table_capacity;

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static int hf_http3_settings_max_field_section_size;

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static int hf_http3_settings_qpack_blocked_streams;

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static int hf_http3_settings_extended_connect;

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static int hf_http3_settings_webtransport;

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static int hf_http3_settings_h3_datagram;

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static int hf_http3_settings_h3_datagram_draft04;

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static int hf_http3_priority_update_element_id;

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static int hf_http3_priority_update_field_value;

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static int hf_http3_datagram;

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static int hf_http3_datagram_quarter_stream_id;

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static int hf_http3_datagram_request_stream_id;

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static int hf_http3_datagram_payload;

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static expert_field ei_http3_qpack_failed;

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static expert_field ei_http3_prefix_int_failed;

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static expert_field ei_http3_huffman_failed;

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/* HTTP3 dissection EIs */

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static expert_field ei_http3_unknown_stream_type;

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/* Encoded data EIs */

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static expert_field ei_http3_header_encoded_state;

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/* HTTP3 header decoding EIs */

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static expert_field ei_http3_header_decoding_failed;

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static expert_field ei_http3_header_decoding_blocked;

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static expert_field ei_http3_header_decoding_no_output;

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static expert_field ei_http3_header_size;

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static expert_field ei_http3_header_transfer_encoding;

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/* HTTP3 body decoding EIs */

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static expert_field ei_http3_body_decompression_failed;

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/* HTTP3 datagram prefix EIs */

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static expert_field ei_http3_datagram_invalid_stream_id;

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/* Initialize the subtree pointers */

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static int ett_http3;

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static int ett_http3_stream_uni;

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static int ett_http3_stream_bidi;

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static int ett_http3_frame;

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static int ett_http3_body_fragment;

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static int ett_http3_body_fragments;

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static int ett_http3_encoded_entity;

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static int ett_http3_settings;

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static int ett_http3_headers;

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static int ett_http3_headers_qpack_blocked;

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static int ett_http3_qpack_update;

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static int ett_http3_qpack_opcode;

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static int ett_http3_datagram;

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static int ett_http3_datagram_stream_id;

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#ifdef HAVE_NGHTTP31

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static const fragment_items http3_body_fragment_items = {

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/* Fragment subtrees */

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&ett_http3_body_fragment,

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&ett_http3_body_fragments,

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/* Fragment fields */

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&hf_http3_body_fragments,

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&hf_http3_body_fragment,

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&hf_http3_body_fragment_overlap,

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&hf_http3_body_fragment_overlap_conflicts,

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&hf_http3_body_fragment_multiple_tails,

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&hf_http3_body_fragment_too_long_fragment,

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&hf_http3_body_fragment_error,

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&hf_http3_body_fragment_count,

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&hf_http3_body_reassembled_in,

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&hf_http3_body_reassembled_length,

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&hf_http3_body_reassembled_data,

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"Body fragments"

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};

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#endif

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/**

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* HTTP3 header constants.

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* The below constants are used for dissecting the

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* code. This is not an exhaustive list.

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*/

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#define HTTP3_HEADER_NAME_CONTENT_ENCODING"content-encoding" "content-encoding"

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#define HTTP3_HEADER_NAME_CONTENT_TYPE"content-type" "content-type"

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#define HTTP3_HEADER_NAME_CONTENT_LENGTH"content-length" "content-length"

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#define HTTP3_HEADER_NAME_TRANSFER_ENCODING"transfer-encoding" "transfer-encoding"

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#define HTTP3_HEADER_NAME_AUTHORITY":authority" ":authority"

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#define HTTP3_HEADER_NAME_METHOD":method" ":method"

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#define HTTP3_HEADER_NAME_PATH":path" ":path"

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#define HTTP3_HEADER_NAME_PROTOCOL":protocol" ":protocol"

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#define HTTP3_HEADER_NAME_SCHEME":scheme" ":scheme"

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#define HTTP3_HEADER_NAME_STATUS":status" ":status"

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#define HTTP3_HEADER_METHOD_CONNECT"CONNECT" "CONNECT"

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#define HTTP3_HEADER_STATUS_PARTIAL_CONTENT"206" "206"

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#define HTTP3_HEADER_UNKNOWN"<unknown>" "<unknown>"

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/**

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* Unidirectional stream types.

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* https://tools.ietf.org/html/draft-ietf-quic-http-29#section-6.2

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* https://tools.ietf.org/html/draft-ietf-quic-qpack-16#section-4.2

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*/

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enum http3_stream_type {

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HTTP3_STREAM_TYPE_CONTROL,

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HTTP3_STREAM_TYPE_PUSH,

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HTTP3_STREAM_TYPE_QPACK_ENCODER,

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HTTP3_STREAM_TYPE_QPACK_DECODER,

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HTTP3_STREAM_TYPE_WEBTRANSPORT = 0x54, // draft-ietf-webtrans-http3-03

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};

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/**

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* Unidirectional stream types (62-bit code space).

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* https://tools.ietf.org/html/draft-ietf-quic-http-29#section-11.2.4

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*/

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// clang-format off

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static const val64_string http3_stream_types[] = {

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/* 0x00 - 0x3f Assigned via Standards Action or IESG Approval. */

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{ 0x00, "Control Stream" },

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{ 0x01, "Push Stream" },

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{ 0x02, "QPACK Encoder Stream" },

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{ 0x03, "QPACK Decoder Stream" },

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{ 0x54, "WebTransport Stream" },

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/* 0x40 - 0x3FFFFFFFFFFFFFFF Assigned via Specification Required policy */

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{ 0, NULL((void*)0) }

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};

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// clang-format on

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/**

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* Frame type codes (62-bit code space).

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* https://tools.ietf.org/html/draft-ietf-quic-http-29#section-11.2.1

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*/

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#define HTTP3_DATA0x0 0x0

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#define HTTP3_HEADERS0x1 0x1

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#define HTTP3_CANCEL_PUSH0x3 0x3

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#define HTTP3_SETTINGS0x4 0x4

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#define HTTP3_PUSH_PROMISE0x5 0x5

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#define HTTP3_GOAWAY0x7 0x7

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#define HTTP3_MAX_PUSH_ID0xD 0xD

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#define HTTP3_WEBTRANSPORT_BISTREAM0x41 0x41

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#define HTTP3_PRIORITY_UPDATE_REQUEST_STREAM0xF0700 0xF0700

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#define HTTP3_PRIORITY_UPDATE_PUSH_STREAM0xF0701 0xF0701

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static const val64_string http3_frame_types[] = {

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/* 0x00 - 0x3f Assigned via Standards Action or IESG Approval. */

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{ HTTP3_DATA0x0, "DATA" },

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{ HTTP3_HEADERS0x1, "HEADERS" },

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{ 0x02, "Reserved" }, // "PRIORITY" in draft-22 and before

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{ HTTP3_CANCEL_PUSH0x3, "CANCEL_PUSH" },

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{ HTTP3_SETTINGS0x4, "SETTINGS" },

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{ HTTP3_PUSH_PROMISE0x5, "PUSH_PROMISE" },

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{ 0x06, "Reserved" },

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{ HTTP3_GOAWAY0x7, "GOAWAY" },

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{ 0x08, "Reserved" },

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{ 0x09, "Reserved" },

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{ HTTP3_MAX_PUSH_ID0xD, "MAX_PUSH_ID" },

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{ 0x0e, "Reserved" }, // "DUPLICATE_PUSH" in draft-26 and before

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/* 0x40 - 0x3FFFFFFFFFFFFFFF Assigned via Specification Required policy */

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{ HTTP3_WEBTRANSPORT_BISTREAM0x41, "WEBTRANSPORT_BISTREAM" }, // draft-ietf-webtrans-http3-03

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{ HTTP3_PRIORITY_UPDATE_REQUEST_STREAM0xF0700, "PRIORITY_UPDATE" }, // RFC 9218

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{ HTTP3_PRIORITY_UPDATE_PUSH_STREAM0xF0701, "PRIORITY_UPDATE" }, // RFC 9218

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{ 0, NULL((void*)0) }

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};

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/**

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* Settings parameter type codes (62-bit code space).

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* https://tools.ietf.org/html/draft-ietf-quic-http-29#name-http-2-settings-parameters

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*/

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#define HTTP3_QPACK_MAX_TABLE_CAPACITY0x01 0x01

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#define HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE0x06 0x06

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#define HTTP3_QPACK_BLOCKED_STREAMS0x07 0x07

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#define HTTP3_EXTENDED_CONNECT0x08 0x08 /* https://datatracker.ietf.org/doc/draft-ietf-httpbis-h3-websockets */

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#define HTTP3_H3_DATAGRAM0x33 0x33 /* rfc9297 */

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#define HTTP3_H3_DATAGRAM_DRAFT040xffd277 0xffd277 /* draft-ietf-masque-h3-datagram-04 */

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#define HTTP3_WEBTRANSPORT0x2b603742 0x2b603742 /* draft-ietf-webtrans-http3-03 */

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static const val64_string http3_settings_vals[] = {

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{ HTTP3_QPACK_MAX_TABLE_CAPACITY0x01, "Max Table Capacity" },

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{ HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE0x06, "Max Field Section Size" },

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{ HTTP3_QPACK_BLOCKED_STREAMS0x07, "Blocked Streams" },

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{ HTTP3_EXTENDED_CONNECT0x08, "Extended CONNECT" },

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{ HTTP3_WEBTRANSPORT0x2b603742, "Enable WebTransport" },

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{ HTTP3_H3_DATAGRAM0x33, "Enable Datagram" },

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{ HTTP3_H3_DATAGRAM_DRAFT040xffd277, "Enable Datagram Draft04" },

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{ 0, NULL((void*)0) }

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};

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/**

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* QPACK encoder stream opcodes.

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*/

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#define QPACK_OPCODE_MASK0xE0 0xE0

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#define QPACK_OPCODE_INSERT_INDEXED0x80 0x80

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#define QPACK_OPCODE_INSERT0x40 0x40

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#define QPACK_OPCODE_SET_DTABLE_CAP0x20 0x20

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#define QPACK_OPCODE_DUPLICATE0x00 0x00

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/**

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* QPACK decoder stream opcodes.

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*/

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#define QPACK_OPCODE_SECTION_ACK0x80 0x80

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#define QPACK_OPCODE_STREAM_CANCEL0x40 0x40

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#define QPACK_OPCODE_ICNT_INCREMENT0x00 0x00

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#define QPACK_HUFFMAN_5_STRING0x20 0x20

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#define QPACK_HUFFMAN_6_STRING0x40 0x40

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#define QPACK_HUFFMAN_7_STRINGq0x80 q0x80

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typedef enum _http3_stream_dir {

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FROM_CLIENT_TO_SERVER = 0,

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FROM_SERVER_TO_CLIENT = 1,

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} http3_stream_dir;

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/**

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* Essential data structures.

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*/

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/**

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* HTTP3 stream info - contains information about HTTP3 stream.

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* HTTP3 streams roughly correspond to QUIC streams, with the

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* HTTP3 Server Push being an exception to the rule.

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*/

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typedef struct _http3_stream_info {

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uint64_t id; /**< HTTP3 stream id */

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uint64_t uni_stream_type; /**< Unidirectional stream type */

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uint64_t broken_from_offset; /**< Unrecognized stream starting at offset (if non-zero). */

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http3_stream_dir direction;

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wmem_list_t *request_header_data; /**< List of request header data */

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wmem_list_t *response_header_data; /**< List of response header data */

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const char *protocol; /**< Protocol from extended CONNECT */

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dissector_handle_t next_handle; /**< Dissector for extended CONNECT protocol */

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http_upgrade_info_t *upgrade_info; /**< Data for new protocol */

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bool_Bool is_connect; /**< Method is CONNECT (plain or extended) */

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} http3_stream_info_t;

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/**

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* HTTP3 session info - contains information about the HTTP3 session.

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* HTTP3 sessions roughly correspond to QUIC connections, at least

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* until the dissector will support connection migration and/or

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* Multipath QUIC. When that happens, a single HTTP3 session would

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* be mapped to multiple QUIC connections, or to multiple QUIC

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* paths (in the MP-QUIC terminology).

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*/

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typedef void *qpack_decoder_t;

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typedef void *qpack_decoder_ctx_t;

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typedef struct _http3_session_info {

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unsigned id;

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qpack_decoder_t qpack_decoder[2]; /**< Decoders for outgoing/incoming QPACK streams. */

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http3_stream_info_t *current_stream; /**< Currently processed stream */

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} http3_session_info_t;

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/**

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* Lookup or create new HTTP3 session object for the pinfo.

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*/

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static http3_session_info_t *http3_session_lookup_or_create(packet_info *pinfo);

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/**

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* HTTP3 Header dissection support.

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*/

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#define QPACK_MAX_DTABLE_SIZE65536 65536 /**< Max size of the QPACK dynamic table. */

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#define QPACK_MAX_BLOCKED512 512 /**< Upper limit on number of streams blocked on QPACK updates. */

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/**

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* Limit the maximum header size to handle legitimate use cases while

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* protecting against hostile traffic (in practice, decompression bombs,

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* as libnghttp3 puts a limit on the compressed size of a single header.)

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*

465

* Note that server limits tend to be lower than those supported by clients;

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* some clients have supported hundreds of MiB of headers (?!) at least in

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* the past. Chrome has had a consistent limit of 256 KiB. This is more than

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* enough, but still reasonably fast. We shouldn't need to limit the number

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* of headers after speeding up tvb_composite.

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*

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* https://stackoverflow.com/questions/686217/maximum-on-http-header-values

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* https://stackoverflow.com/questions/1097651/is-there-a-practical-http-header-length-limit/

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* https://stackoverflow.com/questions/3326210/can-http-headers-be-too-big-for-browsers

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*/

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#define QPACK_MAX_HEADER_SIZE1048576 1048576 /**< Max size of decompressed headers (1 MiB) */

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/**

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* Header caching scheme

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*

480

* The HTTP/3 headers are sent on the wire in QPACK-encoded form.

481

* To dissect the headers, Wireshark needs to keep the decoded

482

* header names and values in memory.

483

*

484

* To optimize dissection time, and to conserve memory

485

* the HTTP/3 dissector keeps all *unique* combinations

486

* of header-name, header-value in a cache.

487

*

488

* The cached values are stored in the "pstr" format:

489

* name length (uint32_t)

490

* name

491

* value length (uint32_t)

492

* value

493

*/

494

495

/**

496

* HTTP3 header field.

497

*

498

* The header field contains two sections:

499

* - encoded points to the location of the encoded field in the *original* packet TVB.

500

* - decoded points to the formatted header string, which is allocated in a cache map,

501

* to conserve memory.

502

* The decoded fields are used to create an auxiliary TVB which will

503

* be used for dissection of decoded header values.

504

*/

505

typedef struct _http3_header_field {

506

struct {

507

unsigned len; /**< Length of the encoded header field. */

508

unsigned offset; /**< Offset of the encoded header field in the decrypted TVB. */

509

} encoded;

510

struct {

511

const char *bytes; /**< Decoded header field bytes. */

512

unsigned len; /**< Length of the decoded header field. */

513

} decoded;

514

} http3_header_field_t;

515

516

/**

517

* HTTP3 encoded header data block.

518

*

519

* This helper structure is used to support header dissection.

520

*/

521

typedef struct _header_block_encoded_iter {

522

uint8_t *bytes;

523

uint32_t len;

524

uint32_t pos;

525

} header_block_encoded_iter_t;

526

527

#define HEADER_BLOCK_ENC_ITER_PTR(hdata)((hdata)->encoded.bytes == ((void*)0) ? ((void*)0) : ((hdata
)->encoded.pos == (hdata)->encoded.len) ? ((void*)0) : (
hdata)->encoded.bytes + (hdata)->encoded.pos) \

528

((hdata)->encoded.bytes == NULL((void*)0) \

529

? NULL((void*)0) \

530

: ((hdata)->encoded.pos == (hdata)->encoded.len) ? NULL((void*)0) : (hdata)->encoded.bytes + (hdata)->encoded.pos)

531

532

#define HEADER_BLOCK_ENC_ITER_REMAINING(hdata)((hdata)->encoded.bytes == ((void*)0) ? 0 : ((hdata)->encoded
.len - (hdata)->encoded.pos)) \

533

((hdata)->encoded.bytes == NULL((void*)0) ? 0 : ((hdata)->encoded.len - (hdata)->encoded.pos))

534

535

#define HEADER_BLOCK_ENC_ITER_INC(hdata, nread)do { if ((hdata)) { (hdata)->encoded.pos += (nread); ((void
) (((hdata)->encoded.pos <= (hdata)->encoded.len) ? (
void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 535, "(hdata)->encoded.pos <= (hdata)->encoded.len"
)))) ; } } while (0) \

536

do { \

537

if ((hdata)) { \

538

(hdata)->encoded.pos += (nread); \

539

DISSECTOR_ASSERT((hdata)->encoded.pos <= (hdata)->encoded.len)((void) (((hdata)->encoded.pos <= (hdata)->encoded.len
) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 539, "(hdata)->encoded.pos <= (hdata)->encoded.len"
)))); \

540

} \

541

} while (0)

542

543

#define HTTP3_HD_DECODER_BLOCKED0x1 0x1

544

#define HTTP3_HD_DECODER_ERROR0x2 0x2

545

/**

546

* HTTP3 header data block.

547

*

548

* The data block corresponds to contents of a single HTTP3 HEADERS frame.

549

* If a packet contains multiple HTTP3 HEADERS frames,

550

* the corresponding blocks will be chained using the `next'

551

* pointer. In this case, individual headers blocks

552

* will be identified by the `offset' field.

553

*/

554

typedef struct _http3_header_data {

555

#if 0

556

/* XXX - This doesn't seem to be used. Would this be any different

557

* than encoded.len ? */

558

uint32_t len; /**< Length of the encoded headers block. */

559

#endif

560

uint32_t offset; /**< Offset of the headers block in the pinfo TVB. */

561

int32_t ds_idx; /**< Index of the data source tvb in the pinfo. */

562

uint16_t state; /**< See HTTP3_HD_DECODER_XXX above */

563

int16_t error; /**< Decoding error code if any. */

564

wmem_array_t * header_fields; /**< List of header fields contained in the header block. */

565

header_block_encoded_iter_t encoded; /**< Used for dissection, not allocated. */

566

struct _http3_header_data * next; /**< Next pointer in the chain. */

567

bool_Bool header_size_exceeded; /**< True if decoding halted due to excessive size. */

568

} http3_header_data_t;

569

570

571

#ifdef HAVE_NGHTTP31

572

/* HTTP/3 pseudo-header fields.

573

*

574

* This is a convenience structure that is used

575

* to collect the values of the HTTP/3 pseudo-headers

576

* while constructing the protocol tree,

577

* and to construct the column info afterwards.

578

* https://www.ietf.org/archive/id/draft-ietf-quic-http-34.html#name-pseudo-header-fields

579

*/

580

typedef struct _http3_pseudo_header_fields {

581

const char *authority;

582

const char *method;

583

const char *path;

584

const char *protocol;

585

const char *reason_phrase; /**< "pseudo" pseudo-header. */

586

const char *scheme;

587

const char *status;

588

} http3_pseudo_header_fields_t;

589

590

#define HTTP3_PSEUDO_HEADERS_INITIALIZER(http3_pseudo_header_fields_t){ .authority = ((void*)0), .method
= ((void*)0), .path = ((void*)0), .protocol = ((void*)0), .reason_phrase
= ((void*)0), .scheme = ((void*)0), .status = ((void*)0), } (http3_pseudo_header_fields_t){ \

591

.authority = NULL((void*)0), \

592

.method = NULL((void*)0), \

593

.path = NULL((void*)0), \

594

.protocol = NULL((void*)0), \

595

.reason_phrase = NULL((void*)0), \

596

.scheme = NULL((void*)0), \

597

.status = NULL((void*)0), \

598

}

599

#endif /* HAVE_NGHTTP3 */

600

601

/* HTTP3 QPACK encoder state

602

*

603

* Store information about how many entries a QPACK encoder stream

604

* has inserted into the decoder at a particular point in the capture

605

* file (both the number newly inserted in the portion of the stream

606

* contained in the current QUIC packet and the total up to that point.)

607

* If a capture frame contains multiple encoder stream segments, the

608

* corresponding blocks will be chained using the 'next' pointer. In this

609

* case, individual blocks will be identified by the data source index

610

* of the tvb within the capture frame and the offset in the ds_tvb.

611

* (Both are necessary for multiple QUIC packets coalesced in a single

612

* UDP datagram with multiple stream segments within a QUIC packet.)

613

*/

614

typedef struct _http3_qpack_encoder_state {

615

unsigned offset; /**< Offset of the headers block in the pinfo TVB. */

616

int32_t ds_idx; /**< Index of the data source tvb in the pinfo. */

617

uint32_t icnt_inc; /**< Number of insertions in this header segment. */

618

uint64_t icnt; /**< Total number of insertions up to this point. */

619

ptrdiff_t nread; /**< Number of bytes read; if negative, an error code. */

620

struct _http3_qpack_encoder_state * next; /**< Next pointer in the chain. */

621

} http3_qpack_encoder_state_t;

622

623

/**

624

* File-scoped context.

625

* This data structure is used to maintain file-scoped

626

* lookup tables. It is reset when the file-scoped

627

* allocator is exited.

628

*/

629

typedef struct _http3_file_local_ctx {

630

wmem_map_t *conn_info_map;

631

#ifdef HAVE_NGHTTP31

632

wmem_map_t *hdr_cache_map;

633

#endif

634

} http3_file_local_ctx;

635

636

/**

637

* @function http3_get_file_local_ctx

638

* @abstract Will create a new instance for the first time

639

* the file is visited.

640

* This function is not intended to be invoked directly,

641

* but should be used via the `HTTP3_CONN_INFO_MAP` et. al. below.

642

* @returns file-local context.

643

*/

644

static http3_file_local_ctx *http3_get_file_local_ctx(void);

645

646

#define HTTP3_CONN_INFO_MAPhttp3_get_file_local_ctx()->conn_info_map http3_get_file_local_ctx()->conn_info_map

647

648

#ifdef HAVE_NGHTTP31

649

#define HTTP3_HEADER_CACHEhttp3_get_file_local_ctx()->hdr_cache_map http3_get_file_local_ctx()->hdr_cache_map

650

#endif

651

652

/**

653

* Check whether the argument represents a reserved code point,

654

* for Stream Type, Frame Type, Error Code, etc.

655

*/

656

static inline bool_Bool

657

http3_is_reserved_code(uint64_t stream_type)

658

{

659

return (stream_type - 0x21) % 0x1f == 0;

660

}

661

662

/**

663

* Attempt to parse QUIC-encoded variable integer.

664

*/

665

static bool_Bool

666

try_get_quic_varint(tvbuff_t *tvb, int offset, uint64_t *value, int *lenvar)

667

{

668

if (tvb_reported_length_remaining(tvb, offset) == 0) {

669

return false0;

670

}

671

unsigned len = 1 << (tvb_get_uint8(tvb, offset) >> 6);

672

if (tvb_reported_length_remaining(tvb, offset) < len) {

673

return false0;

674

}

675

*lenvar = len;

676

if (value) {

677

unsigned n = tvb_get_varint(tvb, offset, -1, value, ENC_VARINT_QUIC0x00000004);

678

DISSECTOR_ASSERT_CMPINT(n, ==, len)((void) ((n == len) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion "
"n" " " "==" " " "len" " (" "%" "l" "d" " " "==" " " "%" "l"
"d" ")", "epan/dissectors/packet-http3.c", 678, (int64_t)n, (
int64_t)len))));

679

}

680

return true1;

681

}

682

683

/**

684

* Return the size of entire HTTP/3 frame.

685

*/

686

static int

687

get_http3_frame_size(tvbuff_t *tvb, int offset)

688

{

689

int type_size, length_size;

690

uint64_t frame_length;

691

692

if (!try_get_quic_varint(tvb, offset, NULL((void*)0), &type_size)) {

693

return 0;

694

}

695

offset += type_size;

696

697

if (!try_get_quic_varint(tvb, offset, &frame_length, &length_size)) {

698

return 0;

699

}

700

701

uint64_t frame_size = type_size + length_size + frame_length;

702

if (frame_size > INT32_MAX(2147483647)) {

703

// We do not support such large frames.

704

return 0;

705

}

706

return (int)frame_size;

707

}

708

709

/**

710

* Check whether the pinfo contains at least one whole HTTP3 frame,

711

* and adjust the pinfo desegmentation settings for the lower

712

* layer (QUIC, generally) to continue the desegmentation process.

713

*/

714

static bool_Bool

715

http3_check_frame_size(tvbuff_t *tvb, packet_info *pinfo, int offset)

716

{

717

int frame_size = get_http3_frame_size(tvb, offset);

718

int remaining = tvb_reported_length_remaining(tvb, offset);

719

if (frame_size && frame_size <= remaining) {

720

return true1;

721

}

722

723

pinfo->desegment_offset = offset;

724

pinfo->desegment_len = frame_size ? (frame_size - remaining) : DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;

725

return false0;

726

}

727

728

static inline http3_stream_dir

729

http3_packet_get_direction(quic_stream_info *stream_info)

730

{

731

return stream_info->from_server

732

? FROM_SERVER_TO_CLIENT

733

: FROM_CLIENT_TO_SERVER;

734

}

735

736

/**

737

* Functions to support decompression of HTTP3 headers.

738

*/

739

#ifdef HAVE_NGHTTP31

740

/**

741

* File-scoped callback to release resources allocated for the QPACK

742

* decoder.

743

*/

744

static bool_Bool

745

qpack_decoder_del_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data)

746

{

747

nghttp3_qpack_decoder_del((nghttp3_qpack_decoder *)user_data);

748

return false0;

749

}

750

751

/**

752

* Memory allocation callbacks for nghttp3_qpack functionality.

753

*/

754

static void *

755

http3_nghttp3_malloc(size_t size, void *user_data _U___attribute__((unused)))

756

{

757

return wmem_alloc0(wmem_file_scope(), size);

758

}

759

760

static void

761

http3_nghttp3_free(void *ptr, void *user_data _U___attribute__((unused)))

762

{

763

wmem_free(wmem_file_scope(), ptr);

764

}

765

766

static void *

767

http3_nghttp3_calloc(size_t nmemb, size_t size, void *user_data _U___attribute__((unused)))

768

{

769

return wmem_alloc0(wmem_file_scope(), nmemb * size);

770

}

771

772

static void *

773

http3_nghttp3_realloc(void *ptr, size_t size, void *user_data _U___attribute__((unused)))

774

{

775

return wmem_realloc(wmem_file_scope(), ptr, size);

776

}

777

778

static nghttp3_mem g_qpack_mem_allocator = {

779

.malloc = http3_nghttp3_malloc,

780

.free = http3_nghttp3_free,

781

.calloc = http3_nghttp3_calloc,

782

.realloc = http3_nghttp3_realloc,

783

};

784

785

static nghttp3_mem *

786

qpack_mem_allocator(wmem_allocator_t *allocator _U___attribute__((unused)), int debug _U___attribute__((unused)))

787

{

788

nghttp3_mem *mem;

789

mem = &g_qpack_mem_allocator;

790

return mem;

791

}

792

793

/**

794

* Initialization routine for the http3_session object.

795

* Invoked during the creation of the new http3_session.

796

*/

797

static void

798

http3_initialize_qpack_decoders(http3_session_info_t *http3_session)

799

{

800

for (int dir = 0; dir < 2; dir++) {

801

nghttp3_qpack_decoder **pdecoder = (nghttp3_qpack_decoder **)&(http3_session->qpack_decoder[dir]);

802

nghttp3_qpack_decoder_new(pdecoder, QPACK_MAX_DTABLE_SIZE65536, QPACK_MAX_BLOCKED512,

803

qpack_mem_allocator(wmem_file_scope(), 1));

804

nghttp3_qpack_decoder_set_max_dtable_capacity(*pdecoder, QPACK_MAX_DTABLE_SIZE65536);

805

wmem_register_callback(wmem_file_scope(), qpack_decoder_del_cb, *pdecoder);

806

}

807

}

808

809

static GHashTable *header_fields_hash;

810

811

static const char *

812

cid_to_string(const quic_cid_t *cid, wmem_allocator_t *scope)

813

{

814

if (cid->len == 0) {

815

return "(none)";

816

}

817

char *str = (char *)wmem_alloc0(scope, 2 * cid->len + 1);

818

bytes_to_hexstr(str, cid->cid, cid->len);

819

return str;

820

}

821

822

static http3_header_data_t *

823

http3_get_header_data(packet_info *pinfo, tvbuff_t *tvb, unsigned offset)

824

{

825

http3_header_data_t *data, *prev = NULL((void*)0);

826

827

unsigned raw_offset = tvb_raw_offset(tvb) + offset;

828

/* The raw offset is relative to the original data source, which is

829

* the decrypted QUIC packet. There can be multiple decrypted QUIC

830

* packets in a single QUIC layer, so this guarantees the same raw

831

* offset from different decrypted data gives different keys.

832

*/

833

int32_t ds_idx = get_data_source_index_by_tvb(pinfo, tvb_get_ds_tvb(tvb));

834

DISSECTOR_ASSERT(ds_idx >= 0)((void) ((ds_idx >= 0) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 834, "ds_idx >= 0"))));

835

836

data = (http3_header_data_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_http3, PROTO_DATA_KEY_HEADER0);

837

838

/*

839

* Attempt to find existing header data block.

840

* In most cases, data will be `NULL'

841

* and this loop won't be visited.

842

*/

843

while (data != NULL((void*)0)) {

844

if (data->offset == raw_offset && data->ds_idx == ds_idx) {

845

/*

846

* We found the matching data. Return it.

847

*/

848

return data;

849

}

850

prev = data;

851

data = data->next;

852

}

853

854

/*

855

* We did not find header data matching the offset.

856

* Allocate a new header data block, and initialize

857

* the offset marker.

858

*/

859

data = wmem_new0(wmem_file_scope(), http3_header_data_t)((http3_header_data_t*)wmem_alloc0((wmem_file_scope()), sizeof
(http3_header_data_t)));

860

data->offset = raw_offset;

861

data->ds_idx = ds_idx;

862

863

/*

864

* Check whether the newly allocated data should be linked

865

* to the tail of existing header block chain, or whether

866

* it is the head of a new header block chain.

867

*/

868

if (prev != NULL((void*)0)) {

869

prev->next = data;

870

} else {

871

p_add_proto_data(wmem_file_scope(), pinfo, proto_http3, PROTO_DATA_KEY_HEADER0, data);

872

}

873

874

return data;

875

}

876

877

static http3_qpack_encoder_state_t *

878

http3_get_qpack_encoder_state(packet_info *pinfo, tvbuff_t *tvb, unsigned offset)

879

{

880

http3_qpack_encoder_state_t *data, *prev = NULL((void*)0);

881

882

unsigned raw_offset = tvb_raw_offset(tvb) + offset;

883

/* The raw offset is relative to the original data source, which is

884

* the decrypted QUIC packet. There can be multiple decrypted QUIC

885

* packets in a single QUIC layer, so this guarantees the same raw

886

* offset from different decrypted data gives different keys.

887

*/

888

int32_t ds_idx = get_data_source_index_by_tvb(pinfo, tvb_get_ds_tvb(tvb));

889

DISSECTOR_ASSERT(ds_idx >= 0)((void) ((ds_idx >= 0) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 889, "ds_idx >= 0"))));

890

891

data = (http3_qpack_encoder_state_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_http3, PROTO_DATA_KEY_QPACK1);

892

893

/*

894

* Attempt to find existing header data block.

895

* In most cases, data will be `NULL'

896

* and this loop won't be visited.

897

*/

898

while (data != NULL((void*)0)) {

899

if (data->offset == raw_offset && data->ds_idx == ds_idx) {

900

/*

901

* We found the matching data. Return it.

902

*/

903

return data;

904

}

905

prev = data;

906

data = data->next;

907

}

908

909

/*

910

* We did not find header data matching the offset.

911

* Allocate a new header data block, and initialize

912

* the offset marker.

913

*/

914

data = wmem_new0(wmem_file_scope(), http3_qpack_encoder_state_t)((http3_qpack_encoder_state_t*)wmem_alloc0((wmem_file_scope()
), sizeof(http3_qpack_encoder_state_t)));

915

data->offset = raw_offset;

916

data->ds_idx = ds_idx;

917

918

/*

919

* Check whether the newly allocated data should be linked

920

* to the tail of existing header block chain, or whether

921

* it is the head of a new header block chain.

922

*/

923

if (prev != NULL((void*)0)) {

924

prev->next = data;

925

} else {

926

p_add_proto_data(wmem_file_scope(), pinfo, proto_http3, PROTO_DATA_KEY_QPACK1, data);

927

}

928

929

return data;

930

}

931

932

static proto_item *

933

try_add_named_header_field(proto_tree *tree, tvbuff_t *tvb, int offset, uint32_t length, const char *header_name,

934

const char *header_value)

935

{

936

int hf_id;

937

header_field_info *hfi;

938

proto_item *ti = NULL((void*)0);

939

940

const int *entry = (const int *)g_hash_table_lookup(header_fields_hash, header_name);

941

if (entry == NULL((void*)0)) {

942

return NULL((void*)0);

943

}

944

945

hf_id = *entry;

946

947

hfi = proto_registrar_get_nth(hf_id);

948

DISSECTOR_ASSERT(hfi != NULL)((void) ((hfi != ((void*)0)) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 948, "hfi != ((void*)0)"))));

949

950

if (FT_IS_UINT32(hfi->type)((hfi->type) == FT_CHAR || (hfi->type) == FT_UINT8 || (
hfi->type) == FT_UINT16 || (hfi->type) == FT_UINT24 || (
hfi->type) == FT_UINT32 || (hfi->type) == FT_FRAMENUM)) {

951

uint32_t value;

952

if (ws_strtou32(header_value, NULL((void*)0), &value)) {

953

ti = proto_tree_add_uint(tree, hf_id, tvb, offset, length, value);

954

}

955

} else if (FT_IS_UINT(hfi->type)(((hfi->type) == FT_CHAR || (hfi->type) == FT_UINT8 || (
hfi->type) == FT_UINT16 || (hfi->type) == FT_UINT24 || (
hfi->type) == FT_UINT32 || (hfi->type) == FT_FRAMENUM) ||
((hfi->type) == FT_UINT40 || (hfi->type) == FT_UINT48 ||
(hfi->type) == FT_UINT56 || (hfi->type) == FT_UINT64))) {

956

uint64_t value;

957

if (ws_strtou64(header_value, NULL((void*)0), &value)) {

958

ti = proto_tree_add_uint64(tree, hf_id, tvb, offset, length, value);

959

}

960

} else {

961

ti = proto_tree_add_item(tree, hf_id, tvb, offset, length, ENC_BIG_ENDIAN0x00000000);

962

}

963

return ti;

964

}

965

966

static void

967

get_header_field_pstr(wmem_allocator_t *scratch, nghttp3_qpack_nv *header_nv, const char **outp, uint32_t *outlen)

968

{

969

char *pstr; /* The returned pstr, always from the cache. */

970

uint32_t pstr_len; /* The length of `pstr'. */

971

nghttp3_vec namev; /* Vector holding the bytes of the field's name. */

972

char *name; /* Typed pointer to field's name. */

973

uint32_t name_len; /* Field's name length. */

974

nghttp3_vec valuev; /* Vector holding the bytes of the field's value. */

975

char *value; /* Typed pointer to field's value. */

976

uint32_t value_len; /* Field's value length. */

977

978

uint8_t *scratch_buffer;

979

980

/* Extract the vectors from `header_nv'. */

981

namev = nghttp3_rcbuf_get_buf(header_nv->name);

982

name = (char *)namev.base;

983

name_len = (uint32_t)namev.len;

984

valuev = nghttp3_rcbuf_get_buf(header_nv->value);

985

value = (char *)valuev.base;

986

value_len = (uint32_t)valuev.len;

987

988

ws_debug("HTTP header: %.*s: %.*s", name_len, name, value_len, value)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 988, __func__, "HTTP header: %.*s: %.*s", name_len, name, value_len
, value); } } while (0);

989

990

/* Construct the pstr in the scratch buffer.

991

* The pstr format is described in the "Header caching scheme"

992

* comment above.

993

*/

994

pstr_len = (4 + name_len) + (4 + value_len);

995

scratch_buffer = (uint8_t *)wmem_alloc(scratch, pstr_len);

996

phtonu32(&scratch_buffer[0], name_len);

997

memcpy(&scratch_buffer[4], name, name_len);

998

phtonu32(&scratch_buffer[4 + name_len], value_len);

999

memcpy(&scratch_buffer[4 + name_len + 4], value, value_len);

1000

1001

/* Check whether the pstr is already in the cache,

1002

* or allocate a new entry. */

1003

pstr = (char *)wmem_map_lookup(HTTP3_HEADER_CACHEhttp3_get_file_local_ctx()->hdr_cache_map, scratch_buffer);

1004

if (pstr == NULL((void*)0)) {

1005

pstr = (char *)wmem_memdup(wmem_file_scope(), scratch_buffer, pstr_len);

1006

wmem_map_insert(HTTP3_HEADER_CACHEhttp3_get_file_local_ctx()->hdr_cache_map, pstr, pstr);

1007

}

1008

1009

/* Decrement `nv' reference counts to avoid memory leaks. */

1010

nghttp3_rcbuf_decref(header_nv->name);

1011

nghttp3_rcbuf_decref(header_nv->value);

1012

1013

*outp = pstr;

1014

*outlen = pstr_len;

1015

}

1016

1017

static const char*

1018

http3_get_header_value(packet_info *pinfo, const char* name, bool_Bool the_other_direction) {

1019

wmem_list_t *header_data_list;

1020

wmem_list_frame_t *frame;

1021

http3_header_data_t *header_data;

1022

http3_session_info_t *http3_session = http3_session_lookup_or_create(pinfo);

1023

http3_stream_info_t *http3_stream = http3_session->current_stream;

1024

1025

if (!http3_stream) {

1026

return NULL((void*)0);

1027

}

1028

1029

if ((http3_stream->direction && the_other_direction) || (!http3_stream->direction && !the_other_direction)) {

1030

header_data_list = http3_stream->request_header_data;

1031

} else {

1032

header_data_list = http3_stream->response_header_data;

1033

}

1034

1035

if (!header_data_list) {

1036

return NULL((void*)0);

1037

}

1038

1039

for (frame = wmem_list_head(header_data_list);

1040

frame;

1041

frame = wmem_list_frame_next(frame))

1042

{

1043

header_data = (http3_header_data_t*)wmem_list_frame_data(frame);

1044

if (!header_data) {

1045

continue;

1046

}

1047

for (unsigned i = 0; i < wmem_array_get_count(header_data->header_fields); ++i) {

1048

http3_header_field_t *in;

1049

uint32_t name_len;

1050

in = (http3_header_field_t *)wmem_array_index(header_data->header_fields, i);

1051

name_len = pntohu32(in->decoded.bytes);

1052

if (strlen(name) == name_len && strncmp(in->decoded.bytes + 4, name, name_len) == 0) {

1053

return (const char*)get_ascii_string(pinfo->pool,

1054

(uint8_t*)in->decoded.bytes + 4 + name_len + 4,

1055

pntohu32(in->decoded.bytes + 4 + name_len));

1056

}

1057

}

1058

}

1059

return NULL((void*)0);

1060

}

1061

1062

static int

1063

dissect_http3_headers(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, unsigned tvb_offset, unsigned offset,

1064

quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

1065

{

1066

http3_header_data_t *header_data; /* The decoded header data block; populated on the first pass. */

1067

http3_session_info_t *http3_session; /* The corresponding HTTP/3 session. */

1068

tvbuff_t *header_tvb; /* Composite TVB containing the decoded header fields. */

1069

unsigned header_len; /* Total length of the decoded header fields. */

1070

int hoffset; /* Offset of a decoded header in the decoded TVB */

1071

proto_item *ti; /* Temporary tree item; used in multiple ways when constructing proto trees. */

1072

http3_pseudo_header_fields_t pseudo_headers; /* Pseudo-header values; populated when building proto trees; used when creating column info. */

1073

1074

http3_session = http3_session_lookup_or_create(pinfo);

1075

header_data = http3_get_header_data(pinfo, tvb, offset);

1076

1077

ws_noisy("pdinfo visited=%d", PINFO_FD_VISITED(pinfo))do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 1077, __func__, "pdinfo visited=%d", ((pinfo)->fd->visited
)); } } while (0);

1078

1079

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

1080

nghttp3_qpack_decoder *decoder;

1081

int length = 0;

1082

http3_stream_dir packet_direction;

1083

1084

/*

1085

* This packet has not been processed yet, which means this is

1086

* the first linear scan. We do header decompression only

1087

* once in linear scan and cache the result. If we don't

1088

* cache, already processed data will be fed into decompressor

1089

* again and again since dissector will be called randomly.

1090

* This makes context out-of-sync.

1091

*/

1092

1093

length = tvb_reported_length_remaining(tvb, tvb_offset);

1094

packet_direction = http3_packet_get_direction(stream_info);

1095

decoder = http3_session->qpack_decoder[packet_direction];

1096

1097

DISSECTOR_ASSERT(decoder)((void) ((decoder) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 1097, "decoder"))));

1098

DISSECTOR_ASSERT(header_data)((void) ((header_data) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 1098, "header_data"))));

1099

DISSECTOR_ASSERT(header_data->encoded.bytes == NULL)((void) ((header_data->encoded.bytes == ((void*)0)) ? (void
)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 1099, "header_data->encoded.bytes == ((void*)0)"
))));

1100

DISSECTOR_ASSERT(header_data->encoded.len == 0)((void) ((header_data->encoded.len == 0) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 1100, "header_data->encoded.len == 0"))));

1101

DISSECTOR_ASSERT(header_data->header_fields == NULL)((void) ((header_data->header_fields == ((void*)0)) ? (void
)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 1101, "header_data->header_fields == ((void*)0)"
))));

1102

1103

header_data->encoded.bytes = tvb_memdup(wmem_file_scope(), tvb, tvb_offset, length);

1104

header_data->encoded.pos = 0;

1105

header_data->encoded.len = length;

1106

1107

nghttp3_qpack_stream_context *sctx = NULL((void*)0);

1108

nghttp3_qpack_stream_context_new(&sctx, http3_stream->id, nghttp3_mem_default());

1109

1110

ws_debug("Header data: %p %d %d", header_data->encoded.bytes, header_data->encoded.pos,do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 1111, __func__, "Header data: %p %d %d", header_data->encoded
.bytes, header_data->encoded.pos, header_data->encoded.
len); } } while (0)

1111

header_data->encoded.len)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 1111, __func__, "Header data: %p %d %d", header_data->encoded
.bytes, header_data->encoded.pos, header_data->encoded.
len); } } while (0);

1112

1113

header_len = 0;

1114

1115

/*

1116

* Attempt to decode headers.

1117

*

1118

* TODO: This may incorrectly put headers that were blocked

1119

* for packet k in the past to this packet n. We will deal with this later

1120

*/

1121

while (HEADER_BLOCK_ENC_ITER_REMAINING(header_data)((header_data)->encoded.bytes == ((void*)0) ? 0 : ((header_data
)->encoded.len - (header_data)->encoded.pos))) {

1122

nghttp3_qpack_nv nv;

1123

uint8_t flags;

1124

1125

if (header_len >= QPACK_MAX_HEADER_SIZE1048576) {

1126

header_data->header_size_exceeded = true1;

1127

break;

1128

}

1129

1130

ws_noisy("%p %p:%d decode decoder=%p sctx=%p", header_data->encoded.bytes,do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 1132, __func__, "%p %p:%d decode decoder=%p sctx=%p", header_data
->encoded.bytes, ((header_data)->encoded.bytes == ((void
*)0) ? ((void*)0) : ((header_data)->encoded.pos == (header_data
)->encoded.len) ? ((void*)0) : (header_data)->encoded.bytes
+ (header_data)->encoded.pos), ((header_data)->encoded
.bytes == ((void*)0) ? 0 : ((header_data)->encoded.len - (
header_data)->encoded.pos)), decoder, sctx); } } while (0)

1131

HEADER_BLOCK_ENC_ITER_PTR(header_data),do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 1132, __func__, "%p %p:%d decode decoder=%p sctx=%p", header_data
->encoded.bytes, ((header_data)->encoded.bytes == ((void
*)0) ? ((void*)0) : ((header_data)->encoded.pos == (header_data
)->encoded.len) ? ((void*)0) : (header_data)->encoded.bytes
+ (header_data)->encoded.pos), ((header_data)->encoded
.bytes == ((void*)0) ? 0 : ((header_data)->encoded.len - (
header_data)->encoded.pos)), decoder, sctx); } } while (0)

1132

HEADER_BLOCK_ENC_ITER_REMAINING(header_data), decoder, sctx)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 1132, __func__, "%p %p:%d decode decoder=%p sctx=%p", header_data
->encoded.bytes, ((header_data)->encoded.bytes == ((void
*)0) ? ((void*)0) : ((header_data)->encoded.pos == (header_data
)->encoded.len) ? ((void*)0) : (header_data)->encoded.bytes
+ (header_data)->encoded.pos), ((header_data)->encoded
.bytes == ((void*)0) ? 0 : ((header_data)->encoded.len - (
header_data)->encoded.pos)), decoder, sctx); } } while (0);

1133

1134

int32_t nread = (int32_t)nghttp3_qpack_decoder_read_request(decoder, sctx, &nv, &flags,

1135

HEADER_BLOCK_ENC_ITER_PTR(header_data)((header_data)->encoded.bytes == ((void*)0) ? ((void*)0) :
((header_data)->encoded.pos == (header_data)->encoded.
len) ? ((void*)0) : (header_data)->encoded.bytes + (header_data
)->encoded.pos),

1136

HEADER_BLOCK_ENC_ITER_REMAINING(header_data)((header_data)->encoded.bytes == ((void*)0) ? 0 : ((header_data
)->encoded.len - (header_data)->encoded.pos)), 1);

1137

/*

1138

* Check for decoding errors.

1139

*/

1140

if (nread < 0) {

1141

header_data->state = HTTP3_HD_DECODER_ERROR0x2;

1142

header_data->error = nread;

1143

ws_debug("Early return nread=%d err=%s", nread, nghttp3_strerror(nread))do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 1143, __func__, "Early return nread=%d err=%s", nread, nghttp3_strerror
(nread)); } } while (0);

1144

break;

1145

}

1146

1147

/*

1148

* Check whether the QPACK decoder is blocked on QPACK encoder stream.

1149

*/

1150

if (flags & NGHTTP3_QPACK_DECODE_FLAG_BLOCKED0x04u) {

1151

uint64_t wicnt, ricnt;

1152

1153

header_data->state = HTTP3_HD_DECODER_BLOCKED0x1;

1154

ricnt = nghttp3_qpack_stream_context_get_ricnt(sctx);

1155

wicnt = nghttp3_qpack_decoder_get_icnt(decoder);

1156

ws_debug("Early return nread=%d blocked=%" PRIu8 " ricnt=%" PRIu64 " wicnt=%" PRIu64,do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 1157, __func__, "Early return nread=%d blocked=%" "hhu" " ricnt=%"
"l" "u" " wicnt=%" "l" "u", nread, flags, ricnt, wicnt); } }
while (0)

1157

nread, flags, ricnt, wicnt)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 1157, __func__, "Early return nread=%d blocked=%" "hhu" " ricnt=%"
"l" "u" " wicnt=%" "l" "u", nread, flags, ricnt, wicnt); } }
while (0);

1158

break;

1159

}

1160

1161

/*

1162

* Check whether the decoder has emitted header data.

1163

*/

1164

if (flags & NGHTTP3_QPACK_DECODE_FLAG_EMIT0x01u) {

1165

http3_header_field_t *out;

1166

1167

ws_noisy("Emit nread=%d flags=%" PRIu8 "", nread, flags)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 1167, __func__, "Emit nread=%d flags=%" "hhu" "", nread, flags
); } } while (0);

1168

1169

/* Create an output field and add it to the headers array */

1170

out = wmem_new0(wmem_file_scope(), http3_header_field_t)((http3_header_field_t*)wmem_alloc0((wmem_file_scope()), sizeof
(http3_header_field_t)));

1171

1172

/* Populate the `encoded' portion. */

1173

out->encoded.len = nread;

1174

out->encoded.offset = header_data->encoded.pos;

1175

1176

/* Populate the `decoded' portion. */

1177

get_header_field_pstr(pinfo->pool, &nv, &out->decoded.bytes, &out->decoded.len);

1178

1179

/* Add the decoded header field to the header data. */

1180

if (header_data->header_fields == NULL((void*)0)) {

1181

header_data->header_fields = wmem_array_new(wmem_file_scope(), sizeof(http3_header_field_t));

1182

}

1183

wmem_array_append(header_data->header_fields, out, 1);

1184

1185

header_len += out->decoded.len;

1186

1187

} else {

1188

proto_tree_add_expert_format(tree, pinfo, &ei_http3_header_decoding_no_output, tvb, tvb_offset, 0,

1189

"QPACK - nothing emitted decoder %p ctx %p flags %" PRIu8"hhu" " error %d (%s)",

1190

decoder, sctx, flags, nread, nghttp3_strerror((int)nread));

1191

}

1192

1193

/*

1194

* Check whether the QPACK decoder has finished.

1195

*/

1196

if (nread == 0 || (flags & NGHTTP3_QPACK_DECODE_FLAG_FINAL0x02u)) {

1197

break;

1198

}

1199

1200

HEADER_BLOCK_ENC_ITER_INC(header_data, nread)do { if ((header_data)) { (header_data)->encoded.pos += (nread
); ((void) (((header_data)->encoded.pos <= (header_data
)->encoded.len) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\""
, "epan/dissectors/packet-http3.c", 1200, "(header_data)->encoded.pos <= (header_data)->encoded.len"
)))) ; } } while (0);

1201

}

1202

nghttp3_qpack_stream_context_del(sctx);

1203

1204

if (stream_info->from_server) {

1205

if (!http3_stream->response_header_data) {

1206

http3_stream->response_header_data = wmem_list_new(wmem_file_scope());

1207

}

1208

wmem_list_append(http3_stream->response_header_data, header_data);

1209

} else {

1210

if (!http3_stream->request_header_data) {

1211

http3_stream->request_header_data = wmem_list_new(wmem_file_scope());

1212

}

1213

wmem_list_append(http3_stream->request_header_data, header_data);

1214

}

1215

}

1216

1217

/* Check if any expert information fields have to be added.

1218

*/

1219

if (header_data->state == HTTP3_HD_DECODER_ERROR0x2) {

1220

proto_tree_add_expert_format(tree, pinfo, &ei_http3_header_decoding_failed, tvb, tvb_offset, 0,

1221

"QPACK decoding error %d (%s)",

1222

header_data->error, nghttp3_strerror(header_data->error));

1223

} else if (header_data->state == HTTP3_HD_DECODER_BLOCKED0x1) {

1224

ti = proto_tree_add_boolean(tree, hf_http3_header_qpack_blocked, tvb, tvb_offset, 0, true1);

1225

proto_item_set_generated(ti);

1226

proto_tree_add_expert_format(tree, pinfo, &ei_http3_header_decoding_blocked, tvb, tvb_offset, 0,

1227

"QPACK decoding blocked");

1228

}

1229

1230

if (header_data->encoded.pos < tvb_offset && header_data->encoded.len != 0) {

1231

proto_tree_add_expert_format(tree, pinfo, &ei_http3_header_encoded_state, tvb, tvb_offset, 0,

1232

"HTTP3 encoded headers - bytes %p pos %d len %d", header_data->encoded.bytes,

1233

header_data->encoded.pos, header_data->encoded.len);

1234

}

1235

1236

if ((header_data->header_fields == NULL((void*)0)) || (wmem_array_get_count(header_data->header_fields) == 0)) {

1237

return tvb_offset;

1238

}

1239

1240

/* Header data contains decoded header values; start building the protocol trees. */

1241

header_tvb = tvb_new_composite();

1242

header_len = 0;

1243

hoffset = 0;

1244

pseudo_headers = HTTP3_PSEUDO_HEADERS_INITIALIZER(http3_pseudo_header_fields_t){ .authority = ((void*)0), .method
= ((void*)0), .path = ((void*)0), .protocol = ((void*)0), .reason_phrase
= ((void*)0), .scheme = ((void*)0), .status = ((void*)0), };

1245

1246

for (unsigned i = 0; i < wmem_array_get_count(header_data->header_fields); ++i) {

1247

http3_header_field_t *in;

1248

tvbuff_t *next_tvb;

1249

1250

in = (http3_header_field_t *)wmem_array_index(header_data->header_fields, i);

1251

header_len += in->decoded.len;

1252

1253

/* Now setup the tvb buffer to have the new data */

1254

next_tvb = tvb_new_child_real_data(tvb, (uint8_t*)in->decoded.bytes, in->decoded.len, in->decoded.len);

1255

tvb_composite_append(header_tvb, next_tvb);

1256

}

1257

1258

tvb_composite_finalize(header_tvb);

1259

add_new_data_source(pinfo, header_tvb, "Decompressed Header");

1260

1261

ti = proto_tree_add_uint(tree, hf_http3_headers_decoded_length, header_tvb, hoffset, 1, header_len);

1262

proto_item_set_generated(ti);

1263

if (header_data->header_size_exceeded) {

1264

expert_add_info(pinfo, ti, &ei_http3_header_size);

1265

}

1266

1267

ti = proto_tree_add_uint(tree, hf_http3_headers_count, header_tvb, hoffset, 1,

1268

wmem_array_get_count(header_data->header_fields));

1269

proto_item_set_generated(ti);

1270

1271

wmem_strbuf_t *headers_buf = wmem_strbuf_create(pinfo->pool)wmem_strbuf_new(pinfo->pool, "");

1272

wmem_strbuf_t *header_buf;

1273

1274

for (unsigned i = 0; i < wmem_array_get_count(header_data->header_fields); ++i) {

1275

http3_header_field_t *in;

1276

proto_item *ti_named_field;

1277

proto_item *header;

1278

proto_tree *header_tree;

1279

uint32_t header_name_length;

1280

const char *header_name;

1281

uint32_t header_value_length;

1282

const char *header_value;

1283

1284

in = (http3_header_field_t *)wmem_array_index(header_data->header_fields, i);

1285

1286

/* Populate tree with header name/value details. */

1287

/* Add 'Header' subtree with description. */

1288

header = proto_tree_add_item(tree, hf_http3_header, tvb, tvb_offset, in->encoded.len, ENC_NA0x00000000);

1289

1290

header_tree = proto_item_add_subtree(header, ett_http3_headers);

1291

1292

/* header value length */

1293

proto_tree_add_item_ret_uint(header_tree, hf_http3_header_name_length, header_tvb, hoffset, 4,

1294

ENC_BIG_ENDIAN0x00000000, &header_name_length);

1295

hoffset += 4;

1296

1297

/* Add header name. */

1298

proto_tree_add_item_ret_string(header_tree, hf_http3_header_name, header_tvb, hoffset, header_name_length,

1299

ENC_ASCII0x00000000 | ENC_NA0x00000000, pinfo->pool, (const uint8_t**)&header_name);

1300

hoffset += header_name_length;

1301

1302

/* header value length */

1303

proto_tree_add_item_ret_uint(header_tree, hf_http3_header_value_length, header_tvb, hoffset, 4,

1304

ENC_BIG_ENDIAN0x00000000, &header_value_length);

1305

hoffset += 4;

1306

1307

/* Add header value. */

1308

proto_tree_add_item_ret_string(header_tree, hf_http3_header_value, header_tvb, hoffset, header_value_length,

1309

ENC_ASCII0x00000000 | ENC_NA0x00000000, pinfo->pool, (const uint8_t**)&header_value);

1310

1311

ti_named_field = try_add_named_header_field(header_tree, header_tvb, hoffset, header_value_length, header_name,

1312

header_value);

1313

1314

hoffset += header_value_length;

1315

1316

/* Create a buffer of one header name and value per line to resemble

1317

* text-based HTTP for adding to Follow Stream. The header_tvb already

1318

* created has the string lengths and lacks newlines. */

1319

header_buf = wmem_strbuf_new(pinfo->pool, header_name);

1320

wmem_strbuf_append_printf(header_buf, ": %s", header_value);

1321

proto_item_append_text(header, ": %s", wmem_strbuf_get_str(header_buf));

1322

wmem_strbuf_append_printf(headers_buf, "%s\n", wmem_strbuf_finalize(header_buf));

1323

1324

/* Collect the pseudo-header values to be used later. */

1325

/* XXX - We could save other headers to possibly save parsing

1326

* later, see HTTP/2 populate_http_header_tracking */

1327

if (strcmp(header_name, HTTP3_HEADER_NAME_METHOD":method") == 0) {

1328

pseudo_headers.method = header_value;

1329

} else if (strcmp(header_name, HTTP3_HEADER_NAME_PROTOCOL":protocol") == 0) {

1330

pseudo_headers.protocol = header_value;

1331

} else if (strcmp(header_name, HTTP3_HEADER_NAME_PATH":path") == 0) {

1332

pseudo_headers.path = header_value;

1333

http_add_path_components_to_tree(header_tvb, pinfo, ti_named_field, hoffset - header_value_length,

1334

header_value_length);

1335

} else if (strcmp(header_name, HTTP3_HEADER_NAME_AUTHORITY":authority") == 0) {

1336

pseudo_headers.authority = header_value;

1337

} else if (strcmp(header_name, HTTP3_HEADER_NAME_SCHEME":scheme") == 0) {

1338

pseudo_headers.scheme = header_value;

1339

} else if (strcmp(header_name, HTTP3_HEADER_NAME_STATUS":status") == 0) {

1340

unsigned status_code;

1341

1342

status_code = (unsigned)strtoul(header_value, NULL((void*)0), 10);

1343

pseudo_headers.status = header_value;

1344

pseudo_headers.reason_phrase = val_to_str_const(status_code, vals_http_status_code, "Unknown");

1345

proto_item_append_text(header_tree, " %s", pseudo_headers.reason_phrase);

1346

proto_item_append_text(tree, ", %s %s", pseudo_headers.status, pseudo_headers.reason_phrase);

1347

} else if (strcmp(header_name, HTTP3_HEADER_NAME_TRANSFER_ENCODING"transfer-encoding") == 0) {

1348

/* The Transfer-Encoding header field MUST NOT be used.

1349

* https://www.rfc-editor.org/rfc/rfc9114.html#section-4.1-11 */

1350

expert_add_info(pinfo, header, &ei_http3_header_transfer_encoding);

1351

}

1352

1353

tvb_offset += in->encoded.len;

1354

}

1355

1356

if (have_tap_listener(http3_follow_tap)) {

1357

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

1358

1359

wmem_strbuf_append(headers_buf, "\n");

1360

follow_data->tvb = tvb_new_child_real_data(header_tvb,

1361

(const uint8_t*)wmem_strbuf_get_str(headers_buf),

1362

(unsigned)wmem_strbuf_get_len(headers_buf),

1363

(unsigned)wmem_strbuf_get_len(headers_buf));

1364

follow_data->stream_id = http3_stream->id;

1365

follow_data->from_server = stream_info->from_server;

1366

1367

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

1368

}

1369

1370

/* We have finished constructing the tree for the header fields.

1371

* Proceed to determine whether this is a variant of the CONNECT

1372

* method and to update the `hf_http3_header_request_full_uri'

1373

* and the info column display accordingly.

1374

*/

1375

if (pseudo_headers.method != NULL((void*)0)) {

1376

proto_item *ti_url;

1377

char *uri;

1378

bool_Bool authority_contains_target = false0;

1379

1380

if (strcmp(pseudo_headers.method, "CONNECT") == 0) {

1381

/* This is a variant of CONNECT method.

1382

* Supported variants:

1383

* 1. "Plain CONNECT"

1384

* https://www.rfc-editor.org/rfc/rfc7231#section-4.3.6

1385

* 2. "Extended CONNECT"

1386

* https://www.rfc-editor.org/rfc/rfc9298.html#section-2

1387

* https://www.rfc-editor.org/rfc/rfc9298.html#section-3.4

1388

* https://www.rfc-editor.org/rfc/rfc8441.html#section-4

1389

*

1390

* "Plain CONNECT" utilizes the `:authority' pseudo-header as

1391

* the connection target.

1392

* The "Extended CONNECT" uses the pseudo-headers

1393

* in the same way as other HTTP methods.

1394

*/

1395

http3_stream->is_connect = true1;

1396

if (pseudo_headers.protocol == NULL((void*)0)) {

1397

/* This is the plain CONNECT method

1398

* https://www.rfc-editor.org/rfc/rfc7231#section-4.3.6

1399

*

1400

* Pseudo-header semantics:

1401

* `:method' contains "CONNECT"

1402

* `:authority' contains the target host and port

1403

* `:scheme' and `:path' MUST be empty

1404

*/

1405

authority_contains_target = true1;

1406

} else if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

1407

http3_stream->protocol = wmem_strdup(wmem_file_scope(), pseudo_headers.protocol);

1408

http3_stream->next_handle = http_upgrade_dissector(http3_stream->protocol);

1409

http3_stream->upgrade_info = wmem_new0(wmem_file_scope(), http_upgrade_info_t)((http_upgrade_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(http_upgrade_info_t)));

1410

http3_stream->upgrade_info->server_port = pinfo->destport;

1411

http3_stream->upgrade_info->http_version = 3;

1412

http3_stream->upgrade_info->get_header_value = http3_get_header_value;

1413

}

1414

}

1415

1416

if (authority_contains_target) {

1417

/* Both plain CONNECT and CONNECT-UDP use only the `:authority' header.

1418

*/

1419

uri = wmem_strdup(pinfo->pool, pseudo_headers.authority);

1420

} else {

1421

/* The Extended CONNECT uses the standard URL construction

1422

*/

1423

uri = wmem_strdup_printf(pinfo->pool, "%s://%s%s",

1424

pseudo_headers.scheme, pseudo_headers.authority, pseudo_headers.path);

1425

}

1426

1427

col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s %s",

1428

pseudo_headers.method, uri);

1429

ti_url = proto_tree_add_string(tree, hf_http3_header_request_full_uri, tvb, 0, 0, uri);

1430

proto_item_set_url(ti_url);

1431

proto_item_set_generated(ti_url);

1432

} else if (pseudo_headers.status != NULL((void*)0)) {

1433

DISSECTOR_ASSERT(pseudo_headers.reason_phrase)((void) ((pseudo_headers.reason_phrase) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 1433, "pseudo_headers.reason_phrase")))); /* Must be filled together with `:status' */

1434

/* append the status code and the reason phrase (for example, HEADERS: 200 OK) */

1435

col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s %s",

1436

pseudo_headers.status, pseudo_headers.reason_phrase);

1437

}

1438

1439

return tvb_offset;

1440

}

1441

1442

#else /* HAVE_NGHTTP3 */

1443

const char *

1444

http3_get_header_value(packet_info *pinfo _U___attribute__((unused)), const char* name _U___attribute__((unused)), bool_Bool the_other_direction _U___attribute__((unused))) {

1445

return NULL((void*)0);

1446

}

1447

1448

#endif /* HAVE_NGHTTP3 */

1449

1450

static http3_session_info_t *

1451

http3_session_new(void)

1452

{

1453

http3_session_info_t *http3_session;

1454

1455

http3_session = wmem_new0(wmem_file_scope(), http3_session_info_t)((http3_session_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(http3_session_info_t)));

1456

1457

#ifdef HAVE_NGHTTP31

1458

http3_initialize_qpack_decoders(http3_session);

1459

#endif

1460

1461

return http3_session;

1462

}

1463

1464

static http3_session_info_t *

1465

http3_session_lookup_or_create(packet_info *pinfo)

1466

{

1467

http3_session_info_t *http3_session;

1468

1469

/* First, try to look up the session by initial QUIC DCID */

1470

quic_cid_t initial_dcid = {0};

1471

if (quic_conn_data_get_conn_client_dcid_initial(pinfo, &initial_dcid)) {

1472

/* Look up the session data in the conn map */

1473

http3_session = (http3_session_info_t *)wmem_map_lookup(HTTP3_CONN_INFO_MAPhttp3_get_file_local_ctx()->conn_info_map, &initial_dcid);

1474

if (http3_session == NULL((void*)0)) {

1475

quic_cid_t *dcid_p = wmem_memdup(wmem_file_scope(), &initial_dcid, sizeof(initial_dcid));

1476

http3_session = http3_session_new();

1477

wmem_map_insert(HTTP3_CONN_INFO_MAPhttp3_get_file_local_ctx()->conn_info_map, dcid_p, http3_session);

1478

}

1479

} else {

1480

/* Initial DCID can not be found, use the 5-tuple for lookup */

1481

conversation_t *conversation = find_or_create_conversation(pinfo);

1482

http3_session = (http3_session_info_t *)conversation_get_proto_data(conversation, proto_http3);

1483

1484

if (http3_session == NULL((void*)0)) {

1485

http3_session = http3_session_new();

1486

conversation_add_proto_data(conversation, proto_http3, http3_session);

1487

}

1488

}

1489

1490

return http3_session;

1491

}

1492

1493

#ifdef HAVE_NGHTTP31

1494

1495

static conversation_t *

1496

http3_find_inner_conversation(packet_info *pinfo, quic_stream_info *stream_info, http3_stream_info_t *http3_stream, void **ctx)

1497

{

1498

conversation_t *inner_conv = NULL((void*)0);

1499

1500

if (stream_info != NULL((void*)0)) {

1501

if (ctx) {

1502

*ctx = pinfo->conv_elements;

1503

}

1504

1505

wmem_array_t *conversation_elements = wmem_array_new(pinfo->pool, sizeof(conversation_element_t));

1506

1507

conversation_element_t h3_stream_addr = {

1508

.type = CE_ADDRESS,

1509

.addr_val = (pinfo->srcport < pinfo->destport) ? pinfo->src : pinfo->dst,

1510

};

1511

wmem_array_append_one(conversation_elements, h3_stream_addr)wmem_array_append((conversation_elements), &(h3_stream_addr
), 1);

1512

1513

conversation_element_t h3_stream_port = {

1514

.type = CE_PORT,

1515

.port_val = (pinfo->srcport < pinfo->destport) ? pinfo->srcport : pinfo->destport,

1516

};

1517

wmem_array_append_one(conversation_elements, h3_stream_port)wmem_array_append((conversation_elements), &(h3_stream_port
), 1);

1518

1519

conversation_element_t h3_stream_quic_stream = {

1520

.type = CE_UINT64,

1521

.uint64_val = http3_stream->id,

1522

};

1523

wmem_array_append_one(conversation_elements, h3_stream_quic_stream)wmem_array_append((conversation_elements), &(h3_stream_quic_stream
), 1);

1524

1525

conversation_element_t h3_stream_last = {

1526

.type = CE_CONVERSATION_TYPE,

1527

.conversation_type_val = CONVERSATION_LOG,

1528

};

1529

wmem_array_append_one(conversation_elements, h3_stream_last)wmem_array_append((conversation_elements), &(h3_stream_last
), 1);

1530

1531

pinfo->conv_elements = (conversation_element_t *)wmem_array_get_raw(conversation_elements);

1532

inner_conv = find_conversation_pinfo(pinfo, 0);

1533

if (!inner_conv) {

1534

inner_conv = conversation_new_full(pinfo->fd->num, pinfo->conv_elements);

1535

}

1536

}

1537

1538

return inner_conv;

1539

}

1540

1541

static void

1542

http3_reset_inner_conversation(packet_info *pinfo, void *ctx)

1543

{

1544

if (ctx) {

1545

struct conversation_element *conv_elements = (struct conversation_element *)ctx;

1546

pinfo->conv_elements = conv_elements;

1547

}

1548

}

1549

1550

enum body_decompression {

1551

BODY_DECOMPRESSION_NONE,

1552

BODY_DECOMPRESSION_ZLIB,

1553

BODY_DECOMPRESSION_BROTLI,

1554

BODY_DECOMPRESSION_ZSTD,

1555

BODY_DECOMPRESSION_FAIL

1556

};

1557

1558

static enum body_decompression

1559

get_body_decompression_info(packet_info *pinfo)

1560

{

1561

const char *content_encoding = http3_get_header_value(pinfo, HTTP3_HEADER_NAME_CONTENT_ENCODING"content-encoding", false0);

1562

const char *status = http3_get_header_value(pinfo, HTTP3_HEADER_NAME_STATUS":status", false0);

1563

if (content_encoding == NULL((void*)0)) {

1564

return BODY_DECOMPRESSION_NONE;

1565

}

1566

if (!http3_decompress_body || g_strcmp0(status, HTTP3_HEADER_STATUS_PARTIAL_CONTENT"206") == 0) {

1567

return BODY_DECOMPRESSION_FAIL;

1568

}

1569

#ifdef USE_ZLIB_OR_ZLIBNG

1570

if (strncmp(content_encoding, "gzip", 4) == 0 || strncmp(content_encoding, "deflate", 7) == 0) {

1571

return BODY_DECOMPRESSION_ZLIB;

1572

}

1573

#endif

1574

#ifdef HAVE_BROTLI1

1575

if (strncmp(content_encoding, "br", 2) == 0) {

1576

return BODY_DECOMPRESSION_BROTLI;

1577

}

1578

#endif

1579

#ifdef HAVE_ZSTD1

1580

if (strncmp(content_encoding, "zstd", 4) == 0) {

1581

return BODY_DECOMPRESSION_ZSTD;

1582

}

1583

#endif

1584

1585

return BODY_DECOMPRESSION_FAIL;

1586

}

1587

1588

static void

1589

dissect_http3_body_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *body_tree, http3_stream_info_t *http3_stream, bool_Bool decompression_success)

1590

{

1591

unsigned length = tvb_reported_length(tvb);

1592

1593

proto_tree_add_item(body_tree, hf_http3_data, tvb, 0, length, ENC_NA0x00000000);

1594

1595

if (have_tap_listener(http3_follow_tap)) {

1596

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

1597

1598

follow_data->tvb = tvb;

1599

follow_data->stream_id = http3_stream->id;

1600

follow_data->from_server = http3_stream->direction;

1601

1602

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

1603

}

1604

1605

/* If we couldn't, or wouldn't, decompress the data, stop here. */

1606

if (!decompression_success)

1607

return;

1608

1609

const char *content_type = http3_get_header_value(pinfo, HTTP3_HEADER_NAME_CONTENT_TYPE"content-type", false0);

1610

if (content_type != NULL((void*)0)) {

1611

const char *semicolon = ws_strchrnul(content_type, ';');

1612

char *media_type = wmem_ascii_strdown(pinfo->pool, content_type, semicolon - content_type);

1613

char *media_type_parameters = NULL((void*)0);

1614

while (*semicolon && *semicolon == ';' && g_ascii_isspace(*semicolon)((g_ascii_table[(guchar) (*semicolon)] & G_ASCII_SPACE) !=
0)) {

1615

++semicolon;

1616

}

1617

if (*semicolon) {

1618

media_type_parameters = wmem_strdup(pinfo->pool, semicolon);

1619

}

1620

media_content_info_t media_type_metadata = { MEDIA_CONTAINER_HTTP_OTHERS, media_type_parameters, NULL((void*)0), NULL((void*)0)};

1621

dissector_try_string_with_data(media_type_dissector_table, media_type,

1622

tvb, pinfo, proto_tree_get_root(body_tree), true1, &media_type_metadata);

1623

}

1624

}

1625

1626

static void

1627

dissect_http3_data_full_body(tvbuff_t *tvb, packet_info *pinfo, proto_tree *http3_tree, http3_stream_info_t *http3_stream)

1628

{

1629

unsigned datalen = tvb_reported_length(tvb);

1630

proto_tree *body_tree = http3_tree;

1631

tvbuff_t *next_tvb = tvb;

1632

1633

const char *content_encoding = http3_get_header_value(pinfo, HTTP3_HEADER_NAME_CONTENT_ENCODING"content-encoding", false0);

1634

enum body_decompression decompression = get_body_decompression_info(pinfo);

1635

bool_Bool decompression_success = true1;

1636

1637

if (decompression != BODY_DECOMPRESSION_NONE) {

1638

proto_item *compressed_ti = NULL((void*)0);

1639

1640

tvbuff_t *decompressed_tvb = NULL((void*)0);

1641

switch (decompression) {

1642

case BODY_DECOMPRESSION_ZLIB:

1643

decompressed_tvb = tvb_child_uncompress_zlib(tvb, tvb, 0, datalen);

1644

break;

1645

case BODY_DECOMPRESSION_BROTLI:

1646

decompressed_tvb = tvb_child_uncompress_brotli(tvb, tvb, 0, datalen);

1647

break;

1648

case BODY_DECOMPRESSION_ZSTD:

1649

decompressed_tvb = tvb_child_uncompress_zstd(tvb, tvb, 0, datalen);

1650

break;

1651

default:

1652

break;

1653

}

1654

1655

compressed_ti = proto_tree_add_none_format(http3_tree,

1656

hf_http3_encoded_entity, tvb, 0, datalen,

1657

"Content-encoded entity body (%s): %u bytes",

1658

content_encoding == NULL((void*)0) ? "unknown" : content_encoding, datalen);

1659

1660

if (decompressed_tvb) {

1661

unsigned decompressed_length = tvb_reported_length(decompressed_tvb);

1662

add_new_data_source(pinfo, decompressed_tvb, "Decompressed entity body");

1663

1664

proto_item_append_text(compressed_ti, " -> %u bytes", decompressed_length);

1665

body_tree = proto_item_add_subtree(compressed_ti, ett_http3_encoded_entity);

1666

next_tvb = decompressed_tvb;

1667

datalen = decompressed_length;

1668

} else {

1669

expert_add_info(pinfo, compressed_ti, &ei_http3_body_decompression_failed);

1670

decompression_success = false0;

1671

}

1672

}

1673

1674

dissect_http3_body_data(next_tvb, pinfo, body_tree, http3_stream, decompression_success);

1675

}

1676

1677

static void

1678

dissect_http3_data_partial_body(tvbuff_t *tvb, packet_info *pinfo, proto_tree *http3_tree, quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

1679

{

1680

unsigned length;

1681

void *saved_ctx = NULL((void*)0);

1682

1683

if (http3_stream->is_connect) {

1684

/* Part of a tunneled CONNECT method. */

1685

proto_item_append_text(http3_tree, " (tunneled data)");

1686

} else {

1687

/* Not part of CONNECT, frame that should be reassembled later. */

1688

proto_item_append_text(http3_tree, " (partial entity body)");

1689

}

1690

1691

length = tvb_reported_length(tvb);

1692

/* Adding this seems redundant with http3.frame_payload. */

1693

proto_tree_add_item(http3_tree, hf_http3_data, tvb, 0, length, ENC_NA0x00000000);

1694

1695

if (http3_stream->next_handle) {

1696

/* Extended CONNECT */

1697

/* inner_conv = */ http3_find_inner_conversation(pinfo, stream_info, http3_stream, &saved_ctx);

1698

http3_stream->upgrade_info->from_server = http3_stream->direction;

1699

call_dissector_only(http3_stream->next_handle, tvb, pinfo, proto_tree_get_root(http3_tree), http3_stream->upgrade_info);

1700

http3_reset_inner_conversation(pinfo, saved_ctx);

1701

}

1702

}

1703

1704

static bool_Bool

1705

should_attempt_to_reassemble_data_content(http3_stream_info_t *http3_stream)

1706

{

1707

/* If this data frame is part of a CONNECT tunnel, don't try to reassemble.

1708

* XXX - This is what HTTP/2 does, but perhaps CONNECT data should also

1709

* use the streaming reassembly mode, once that is implemented.

1710

*/

1711

if (http3_stream->is_connect) {

1712

return false0;

1713

}

1714

1715

return true1;

1716

}

1717

1718

static tvbuff_t*

1719

reassemble_http3_data_into_full_content(tvbuff_t *tvb, packet_info *pinfo, proto_tree *http3_tree, unsigned offset, quic_stream_info *stream_info, http3_stream_info_t *http3_stream, bool_Bool fin)

1720

{

1721

if (!should_attempt_to_reassemble_data_content(http3_stream)) {

1722

return NULL((void*)0);

1723

}

1724

1725

fragment_head *head = NULL((void*)0);

1726

unsigned remaining = tvb_captured_length_remaining(tvb, offset);

1727

unsigned content_length;

1728

bool_Bool content_length_set = false0;

1729

1730

/* We can re-use the QUIC reassembly functions; we only have one body

1731

* reassembly per request/response (since we only reassemble at FIN

1732

* or when reaching the content-length), so the QUIC stream_info

1733

* has all the necessary information to make the reassembly unique. */

1734

1735

/* Are we starting the body defragmentation? */

1736

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && !fragment_get(&http3_body_reassembly_table, pinfo, 0, stream_info)) {

1737

/* If so, do we know the content length */

1738

const char *content_length_str = http3_get_header_value(pinfo, HTTP3_HEADER_NAME_CONTENT_LENGTH"content-length", false0);

1739

if (content_length_str && ws_strtou(content_length_str, NULL((void*)0), &content_length)) {

1740

content_length_set = true1;

1741

/* Is this DATA frame the entire content-length? */

1742

if (remaining == content_length) {

1743

/* Yes; there are no more DATA frames. If FIN isn't set, that

1744

* is because a later QUIC frame with no DATA will have FIN.

1745

* Let's go ahead and desegment now. The reassembly head isn't

1746

* created, so we can't use fragment_set_tot_len, which will

1747

* handle this in the other cases.

1748

*

1749

* XXX - Would it be simpler to have something like

1750

* fragment_start_seq_check?

1751

*/

1752

fin = true1;

1753

}

1754

}

1755

}

1756

1757

/* We might want a fragment_add_next instead of fragment_add_check_next so

1758

* that we can get reassembly errors when the segment is too long instead

1759

* of creating a new reassembly. */

1760

head = fragment_add_check_next(&http3_body_reassembly_table, tvb, offset, pinfo, 0, stream_info, remaining, !fin);

1761

if (content_length_set) {

1762

fragment_set_tot_len(&http3_body_reassembly_table, pinfo, 0, stream_info, content_length);

1763

}

1764

1765

if (head) {

1766

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

1767

/* XXX - Remember that we dissected via DATA frames so we don't need

1768

* to dissect at FIN in a non-DATA frame, e.g. HEADERS or GREASE. */

1769

}

1770

/* The Info column information is less useful when dissected in the

1771

* same capture file frame, even in a different HTTP/3 DATA frame. */

1772

if (pinfo->num != head->reassembled_in) {

1773

col_append_frame_number(pinfo, COL_INFO, " [HTTP/3 reassembled in #%u]",

1774

head->reassembled_in);

1775

}

1776

/* This should work now (layer numbers are more stable), but check

1777

* to see if we need to do what HTTP/2 does. */

1778

return process_reassembled_data(tvb, offset, pinfo, "Reassembled body",

1779

head, &http3_body_fragment_items, NULL((void*)0), http3_tree);

1780

1781

#if 0

1782

proto_tree_add_uint(http3_tree, hf_http3_body_reassembled_in, tvb, 0,

1783

0, head->reassembled_in);

1784

#endif

1785

}

1786

1787

return NULL((void*)0);

1788

}

1789

1790

static int

1791

dissect_http3_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *http3_tree, unsigned offset _U___attribute__((unused)),

1792

quic_stream_info *stream_info, http3_stream_info_t *http3_stream, bool_Bool fin)

1793

{

1794

/* Padding is not defined in HTTP/3 DATA Frames

1795

* https://www.rfc-editor.org/rfc/rfc9114.html#name-comparison-of-http-2-and-ht

1796

*/

1797

1798

/* XXX - HTTP/2 supports fake headers for a stream here */

1799

1800

/* "Because some messages are large or unbounded, endpoints SHOULD begin

1801

* processing partial HTTP messages once enough of the message has been

1802

* received to make progress."

1803

* https://www.rfc-editor.org/rfc/rfc9114.html#section-4.1-14

1804

* Not all possible media type subdissectors support defragmentation via

1805

* setting desegment_offset and desegment_len in pinfo, and the necessary

1806

* hooks are not in this dissector. For now, just reassemble everything

1807

* into the full content.

1808

*

1809

* XXX - Cf. what the HTTP/2 dissector does for the streaming reassembly

1810

* mode.

1811

*/

1812

1813

tvbuff_t *data_tvb = reassemble_http3_data_into_full_content(tvb, pinfo, http3_tree, offset, stream_info, http3_stream, fin);

1814

if (data_tvb) {

1815

dissect_http3_data_full_body(data_tvb, pinfo, http3_tree, http3_stream);

1816

} else {

1817

dissect_http3_data_partial_body(tvb, pinfo, http3_tree, stream_info, http3_stream);

1818

}

1819

1820

return tvb_reported_length(tvb);

1821

}

1822

#else

1823

static int

1824

dissect_http3_data(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *http3_tree, unsigned offset _U___attribute__((unused)),

1825

quic_stream_info *stream_info _U___attribute__((unused)), http3_stream_info_t *http3_stream _U___attribute__((unused)), bool_Bool fin _U___attribute__((unused)))

1826

{

1827

unsigned length = tvb_reported_length(tvb);

1828

/* Adding this seems redundant with http3.frame_payload. */

1829

proto_tree_add_item(http3_tree, hf_http3_data, tvb, 0, length, ENC_NA0x00000000);

1830

1831

return length;

1832

}

1833

#endif /* HAVE_NGHTTP3 */

1834

1835

/* Settings */

1836

static int

1837

dissect_http3_settings(tvbuff_t *tvb, packet_info *pinfo, proto_tree *http3_tree, unsigned offset)

1838

{

1839

uint64_t settingsid, value;

1840

unsigned lenvar;

1841

proto_item *ti_settings, *pi;

1842

proto_tree *settings_tree;

1843

1844

while (tvb_reported_length_remaining(tvb, offset) > 0) {

1845

ti_settings = proto_tree_add_item(http3_tree, hf_http3_settings, tvb, offset, 2, ENC_NA0x00000000);

1846

settings_tree = proto_item_add_subtree(ti_settings, ett_http3_settings);

1847

pi = proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_identifier, tvb, offset, -1,

1848

ENC_VARINT_QUIC0x00000004, &settingsid, &lenvar);

1849

/* Check if it is a GREASE Settings ID */

1850

if (http3_is_reserved_code(settingsid)) {

1851

proto_item_set_text(pi, "Settings Identifier: Reserved (%#" PRIx64"l" "x" ")", settingsid);

1852

proto_item_append_text(ti_settings, " - Reserved (GREASE)");

1853

} else {

1854

proto_item_append_text(ti_settings, " - %s",

1855

val64_to_str_wmem(pinfo->pool, settingsid, http3_settings_vals, "Unknown (%#" PRIx64"l" "x" ")"));

1856

}

1857

1858

offset += lenvar;

1859

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_value, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, NULL((void*)0),

1860

&lenvar);

1861

1862

switch (settingsid) {

1863

case HTTP3_QPACK_MAX_TABLE_CAPACITY0x01:

1864

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_qpack_max_table_capacity, tvb, offset, -1,

1865

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1866

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1867

break;

1868

case HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE0x06:

1869

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_max_field_section_size, tvb, offset, -1,

1870

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1871

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1872

break;

1873

case HTTP3_QPACK_BLOCKED_STREAMS0x07:

1874

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_qpack_blocked_streams, tvb, offset, -1,

1875

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1876

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1877

break;

1878

case HTTP3_EXTENDED_CONNECT0x08:

1879

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_extended_connect, tvb, offset, -1,

1880

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1881

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1882

break;

1883

case HTTP3_WEBTRANSPORT0x2b603742:

1884

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_webtransport, tvb, offset, -1,

1885

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1886

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1887

break;

1888

case HTTP3_H3_DATAGRAM0x33:

1889

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_h3_datagram, tvb, offset, -1,

1890

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1891

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1892

break;

1893

case HTTP3_H3_DATAGRAM_DRAFT040xffd277:

1894

proto_tree_add_item_ret_varint(settings_tree, hf_http3_settings_h3_datagram_draft04, tvb, offset, -1,

1895

ENC_VARINT_QUIC0x00000004, &value, &lenvar);

1896

proto_item_append_text(ti_settings, ": %" PRIu64"l" "u", value);

1897

break;

1898

default:

1899

/* No Default */

1900

break;

1901

}

1902

offset += lenvar;

1903

}

1904

1905

return offset;

1906

}

1907

1908

/**

1909

* Priority Update

1910

*/

1911

static int

1912

dissect_http3_priority_update(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *http3_tree, unsigned offset,

1913

http3_stream_info_t *http3_stream)

1914

{

1915

uint64_t element_id;

1916

unsigned priority_field_value_len;

1917

unsigned lenvar;

1918

1919

proto_tree_add_item_ret_varint(http3_tree, hf_http3_priority_update_element_id, tvb, offset, -1, ENC_VARINT_QUIC0x00000004,

1920

&element_id, &lenvar);

1921

offset += lenvar;

1922

priority_field_value_len = tvb_reported_length_remaining(tvb, offset);

1923

1924

proto_tree_add_item(http3_tree, hf_http3_priority_update_field_value, tvb, offset, priority_field_value_len,

1925

ENC_ASCII0x00000000);

1926

1927

if (have_tap_listener(http3_follow_tap)) {

1928

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

1929

1930

wmem_strbuf_t *priority_buf = wmem_strbuf_new(pinfo->pool, "priority: ");

1931

tvbuff_t *priority_tvb = tvb_new_composite();

1932

tvb_composite_append(priority_tvb,

1933

tvb_new_child_real_data(tvb,

1934

(const uint8_t*)wmem_strbuf_get_str(priority_buf),

1935

(unsigned)wmem_strbuf_get_len(priority_buf),

1936

(unsigned)wmem_strbuf_get_len(priority_buf)));

1937

tvb_composite_append(priority_tvb, tvb_new_subset_length(tvb, offset, priority_field_value_len));

1938

priority_buf = wmem_strbuf_create(pinfo->pool)wmem_strbuf_new(pinfo->pool, "");

1939

wmem_strbuf_append_printf(priority_buf, " [Prioritized Element ID %" PRIu64"l" "u" "]\n", element_id);

1940

tvb_composite_append(priority_tvb,

1941

tvb_new_child_real_data(tvb,

1942

(const uint8_t*)wmem_strbuf_get_str(priority_buf),

1943

(unsigned)wmem_strbuf_get_len(priority_buf),

1944

(unsigned)wmem_strbuf_get_len(priority_buf)));

1945

tvb_composite_finalize(priority_tvb);

1946

follow_data->tvb = priority_tvb;

1947

follow_data->stream_id = http3_stream->id;

1948

follow_data->from_server = http3_stream->direction;

1949

1950

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

1951

}

1952

1953

offset += priority_field_value_len;

1954

1955

return offset;

1956

}

1957

1958

static int

1959

dissect_http3_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

1960

{

1961

uint64_t frame_type, frame_length;

1962

unsigned type_length_size, lenvar, payload_length, total_length;

1963

proto_item *ti_ft, *ti_ft_type, *ti_streamid;

1964

proto_tree *ft_tree;

1965

const char *ft_display_name;

1966

bool_Bool use_follow_tap = false0;

1967

bool_Bool fin = false0;

1968

1969

ti_ft = proto_tree_add_item(tree, hf_http3_frame, tvb, offset, -1, ENC_NA0x00000000);

1970

ft_tree = proto_item_add_subtree(ti_ft, ett_http3_frame);

1971

1972

ti_streamid = proto_tree_add_uint64(ft_tree, hf_http3_frame_streamid, tvb, offset, 0, http3_stream->id);

1973

proto_item_set_generated(ti_streamid);

1974

1975

ti_ft_type = proto_tree_add_item_ret_varint(ft_tree, hf_http3_frame_type, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, &frame_type,

1976

&lenvar);

1977

offset += lenvar;

1978

type_length_size = lenvar;

1979

if (http3_is_reserved_code(frame_type)) {

1980

proto_item_set_text(ti_ft_type, "Type: Reserved (%#" PRIx64"l" "x" ")", frame_type);

1981

ft_display_name = "Reserved (GREASE)";

1982

} else {

1983

ft_display_name = val64_to_str_wmem(pinfo->pool, frame_type, http3_frame_types, "Unknown (%#" PRIx64"l" "x" ")");

1984

col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", ft_display_name);

1985

}

1986

proto_tree_add_item_ret_varint(ft_tree, hf_http3_frame_length, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, &frame_length,

1987

&lenvar);

1988

proto_item_set_text(ti_ft, "%s len=%" PRId64"l" "d", ft_display_name, frame_length);

1989

offset += lenvar;

1990

type_length_size += lenvar;

1991

1992

if (ckd_add(&total_length, type_length_size, frame_length)__builtin_add_overflow((type_length_size), (frame_length), (&
total_length))) {

1993

// There is no way for us to correctly handle these sizes. Most likely

1994

// it is garbage.

1995

return INT32_MAX(2147483647);

1996

}

1997

1998

proto_item_set_len(ti_ft, total_length);

1999

payload_length = (unsigned)frame_length;

2000

if (payload_length == 0) {

2001

return offset;

2002

}

2003

2004

if (stream_info->fin && tvb_reported_length_remaining(tvb, offset) == frame_length) {

2005

// If the QUIC stream is at FIN, then finish reassembly iff this

2006

// is the last HTTP/3 frame within the QUIC STREAM frame.

2007

fin = true1;

2008

}

2009

proto_tree_add_item(ft_tree, hf_http3_frame_payload, tvb, offset, payload_length, ENC_NA0x00000000);

2010

2011

switch (frame_type) {

2012

case HTTP3_DATA0x0: { /* TODO: dissect Data Frame */

2013

tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, payload_length);

2014

dissect_http3_data(next_tvb, pinfo, ft_tree, 0, stream_info, http3_stream, fin);

2015

fin = false0;

2016

} break;

2017

case HTTP3_HEADERS0x1: {

2018

#ifdef HAVE_NGHTTP31

2019

tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, payload_length);

2020

dissect_http3_headers(next_tvb, pinfo, ft_tree, 0, offset, stream_info, http3_stream);

2021

#else

2022

use_follow_tap = true1;

2023

#endif /* HAVE_NGHTTP3 */

2024

} break;

2025

case HTTP3_CANCEL_PUSH0x3: /* TODO: dissect Cancel_Push Frame */

2026

break;

2027

case HTTP3_SETTINGS0x4: { /* Settings Frame */

2028

tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, payload_length);

2029

dissect_http3_settings(next_tvb, pinfo, ft_tree, 0);

2030

} break;

2031

case HTTP3_PUSH_PROMISE0x5: /* TODO: dissect Push_Promise_Frame */

2032

break;

2033

case HTTP3_GOAWAY0x7: /* TODO: dissect Goaway Frame */

2034

break;

2035

case HTTP3_MAX_PUSH_ID0xD: /* TODO: dissect Max_Push_ID Frame */

2036

break;

2037

case HTTP3_PRIORITY_UPDATE_REQUEST_STREAM0xF0700:

2038

/* FALLTHROUGH */

2039

case HTTP3_PRIORITY_UPDATE_PUSH_STREAM0xF0701: { /* Priority_Update Frame */

2040

tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, payload_length);

2041

dissect_http3_priority_update(next_tvb, pinfo, ft_tree, 0, http3_stream);

2042

} break;

2043

default: /* TODO: add expert advice (remember to treat GREASE differntly) */

2044

break;

2045

}

2046

2047

#ifdef HAVE_NGHTTP31

2048

if (fin) {

2049

fragment_head *head = NULL((void*)0);

2050

head = fragment_end_seq_next(&http3_body_reassembly_table, pinfo, 0, stream_info);

2051

2052

if (head) {

2053

tvbuff_t *reassembled_data = process_reassembled_data(tvb, offset, pinfo, "Reassembled body",

2054

head, &http3_body_fragment_items, NULL((void*)0), ft_tree);

2055

if (reassembled_data)

2056

dissect_http3_data_full_body(reassembled_data, pinfo, ft_tree, http3_stream);

2057

}

2058

}

2059

#endif

2060

2061

if (use_follow_tap && have_tap_listener(http3_follow_tap)) {

2062

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

2063

2064

follow_data->tvb = tvb_new_subset_length(tvb, offset, payload_length);

2065

follow_data->stream_id = http3_stream->id;

2066

follow_data->from_server = stream_info->from_server;

2067

2068

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

2069

}

2070

2071

offset += payload_length;

2072

return offset;

2073

}

2074

2075

static void

2076

report_unknown_stream_type(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,

2077

quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

2078

{

2079

/*

2080

* https://www.rfc-editor.org/rfc/rfc9114.html#name-unidirectional-streams

2081

*

2082

* "If the stream header indicates a stream type which is not supported by

2083

* the recipient, the remainder of the stream cannot be consumed as the

2084

* semantics are unknown."

2085

*/

2086

proto_tree_add_expert_format(tree, pinfo, &ei_http3_unknown_stream_type, tvb, offset, 0,

2087

"Unknown stream type %#" PRIx64"l" "x" " on Stream ID %#" PRIx64"l" "x",

2088

http3_stream->uni_stream_type, stream_info->stream_id);

2089

}

2090

2091

/**

2092

* https://www.rfc-editor.org/rfc/rfc7541#section-5.1

2093

* via

2094

* https://www.rfc-editor.org/rfc/rfc9204.html#name-prefixed-integers

2095

*

2096

* Read a QPACK varint value, return number of consumed bytes, including the prefix byte.

2097

*

2098

* Optionally return the value of the one-bit flag that precedes the QPACK prefixed integer.

2099

*

2100

* Such flag is is interpreted differently, depending on the context:

2101

* - If the prefixed integer represents length of a string literal, the flag value

2102

* indicates that the following string literal is encoded using Huffman code.

2103

* See https://www.rfc-editor.org/rfc/rfc7541#section-5.2 for details.

2104

* - If the prefixed integer represents a name index, the flag value indicates

2105

* that the following name index belongs to the static/dynamic table.

2106

* See https://www.rfc-editor.org/rfc/rfc9204.html#name-insert-with-name-reference

2107

* for details.

2108

*/

2109

#define HTTP3_QPACK_MAX_SHIFT62 62

2110

#define HTTP3_QPACK_MAX_INT((1ull << 62) - 1) ((1ull << HTTP3_QPACK_MAX_SHIFT62) - 1)

2111

2112

static unsigned

2113

read_qpack_prefixed_integer(tvbuff_t *tvb, unsigned offset, unsigned prefix,

2114

uint64_t *out_result, bool_Bool *out_flag)

2115

{

2116

/*

2117

* This can throw a ReportedBoundError; in fact, we count on that

2118

* currently in order to detect QPACK fields split across packets.

2119

*/

2120

uint64_t k = (uint8_t)((1 << prefix) - 1);

2121

uint64_t n = 0;

2122

uint64_t add = 0;

2123

uint64_t shift = 0;

2124

uint8_t byte;

2125

unsigned start_offset = offset;

2126

2127

byte = tvb_get_uint8(tvb, offset);

2128

2129

if (out_flag) {

2130

*out_flag = byte & (1 << prefix);

2131

}

2132

2133

if ((byte & k) != k) {

2134

*out_result = byte & k;

2135

return 1;

2136

}

2137

2138

n = k;

2139

2140

for (++offset; tvb_captured_length_remaining(tvb, offset); ++offset, shift += 7) {

2141

byte = tvb_get_uint8(tvb, offset);

2142

add = byte & 0x7f;

2143

if (shift > HTTP3_QPACK_MAX_SHIFT62) {

2144

return 0;

2145

}

2146

if ((HTTP3_QPACK_MAX_INT((1ull << 62) - 1) >> shift) < add) {

2147

return 0;

2148

}

2149

add <<= shift;

2150

if (HTTP3_QPACK_MAX_INT((1ull << 62) - 1) - add < n) {

2151

return 0;

2152

}

2153

2154

n += add;

2155

2156

if ((byte & (1 << 7)) == 0) {

2157

break;

2158

}

2159

}

2160

2161

*out_result = n;

2162

2163

/* Otherwise, consume extra byte and mark the fin output param */

2164

return offset - start_offset + 1;

2165

}

2166

2167

static int

2168

dissect_http3_qpack_encoder_stream(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree,

2169

int start_offset, http3_stream_info_t *http3_stream, int *picnt)

2170

{

2171

unsigned end_offset; /* Sentinel offset past the buffer. */

2172

tvbuff_t *decoded_tvb; /* TVB with the result of decoding the Huffman-encoding strings */

2173

volatile bool_Bool can_continue; /* Flag to indicate that we can parse the next QPACK instruction */

2174

volatile int icnt; /* Number of dissected QPACK instructions */

2175

volatile unsigned offset; /* Current parsing offset, relative to the start of the tvb */

2176

2177

can_continue = true1;

2178

icnt = 0;

2179

offset = start_offset;

2180

end_offset = start_offset + tvb_captured_length_remaining(tvb, start_offset);

2181

wmem_strbuf_t *follow_buf = wmem_strbuf_create(pinfo->pool)wmem_strbuf_new(pinfo->pool, "");

2182

wmem_strbuf_t *instr_buf;

2183

2184

while (offset < end_offset && can_continue) {

2185

int inst_offset; /* Starting offset of the currently parsed instruction in the tvb */

2186

int inst_len; /* Total length of the instruction */

2187

unsigned varint_len;

2188

2189

proto_item *opcode_ti = NULL((void*)0), *huffman_ti;

2190

proto_tree *opcode_tree;

2191

2192

inst_offset = offset;

2193

2194

TRY{ except_t *volatile exc; volatile int except_state = 0; static
const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode
except_sn; struct except_catch except_ch; except_setup_try(&
except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch
.except_jmp)) *(&exc) = &except_ch.except_obj; else *
(&exc) = 0; if(except_state & 1) except_state |= 2; except_state
&= ~1; if (except_state == 0 && exc == 0) {

2195

uint8_t opcode; /* The instruction opcode */

2196

2197

opcode = tvb_get_uint8(tvb, inst_offset) & QPACK_OPCODE_MASK0xE0;

2198

2199

ws_noisy("Decoding opcode=%" PRIu8 " decoded=%d start=%d current=%d end=%d",do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2200, __func__, "Decoding opcode=%" "hhu" " decoded=%d start=%d current=%d end=%d"
, opcode, (offset - start_offset), start_offset, offset, end_offset
); } } while (0)

2200

opcode, (offset - start_offset), start_offset, offset, end_offset)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2200, __func__, "Decoding opcode=%" "hhu" " decoded=%d start=%d current=%d end=%d"
, opcode, (offset - start_offset), start_offset, offset, end_offset
); } } while (0);

2201

2202

if (opcode & QPACK_OPCODE_INSERT_INDEXED0x80) {

2203

unsigned name_idx_len = 0;

2204

uint64_t name_idx = 0;

2205

unsigned val_offset = 0;

2206

uint64_t val_len = 0;

2207

bool_Bool val_huffman = false0;

2208

const uint8_t *val_str = NULL((void*)0);

2209

2210

/* https://datatracker.ietf.org/doc/html/rfc9204#name-insert-with-name-reference

2211

*

2212

* 0 1 2 3 4 5 6 7

2213

* +---+---+---+---+---+---+---+---+

2214

* | 1 | T | Name Index (6+) |

2215

* +---+---+-----------------------+

2216

* | H | Value Length (7+) |

2217

* +---+---------------------------+

2218

* | Value String (Length bytes) |

2219

* +-------------------------------+

2220

*/

2221

2222

/* Read the 6-encoded name index len */

2223

name_idx_len = read_qpack_prefixed_integer(tvb, offset, 6, &name_idx, NULL((void*)0));

2224

if (name_idx_len == 0) {

2225

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2226

}

2227

offset += name_idx_len;

2228

2229

/* Read the 7-encoded value len and set the value offset for subsequent dissection */

2230

varint_len = read_qpack_prefixed_integer(tvb, offset, 7, &val_len, &val_huffman);

2231

if (varint_len == 0) {

2232

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2233

}

2234

/* XXX - If val_len > UINT32_MAX, fail with expert info? */

2235

offset += varint_len;

2236

val_offset = offset;

2237

offset += (uint32_t)val_len;

2238

2239

/* Update the instruction length */

2240

inst_len = offset - inst_offset;

2241

2242

/* Add the protocol tree items */

2243

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_encoder_opcode_insert_indexed,

2244

tvb, inst_offset,inst_len, ENC_NA0x00000000);

2245

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2246

proto_tree_add_uint64(opcode_tree, hf_http3_qpack_encoder_opcode_insert_indexed_ref,

2247

tvb, inst_offset, inst_len, name_idx);

2248

2249

if (val_huffman) {

2250

huffman_ti = proto_tree_add_item(opcode_tree, hf_http3_qpack_encoder_opcode_insert_indexed_hval,

2251

tvb, val_offset, (uint32_t)val_len, ENC_NA0x00000000);

2252

decoded_tvb = tvb_child_uncompress_hpack_huff(tvb, val_offset, (unsigned)val_len);

2253

if (decoded_tvb) {

2254

add_new_data_source(pinfo, decoded_tvb, "Decoded QPACK Value");

2255

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_indexed_val,

2256

decoded_tvb, 0, tvb_captured_length(decoded_tvb), ENC_NA0x00000000, pinfo->pool, &val_str);

2257

} else {

2258

expert_add_info(pinfo, huffman_ti, &ei_http3_huffman_failed);

2259

val_str = (const uint8_t*)"???";

2260

}

2261

} else {

2262

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_indexed_val,

2263

tvb, val_offset, (uint32_t)val_len, ENC_NA0x00000000, pinfo->pool, &val_str);

2264

}

2265

instr_buf = wmem_strbuf_new(pinfo->pool, "INSERT_INDEXED");

2266

wmem_strbuf_append_printf(instr_buf, "[%" PRIu64"l" "u" "=%s]", name_idx, val_str);

2267

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2268

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2269

} else if (opcode & QPACK_OPCODE_INSERT0x40) {

2270

unsigned name_offset = 0;

2271

uint64_t name_len = 0;

2272

bool_Bool name_huffman = false0;

2273

const uint8_t *name_str = NULL((void*)0);

2274

bool_Bool val_huffman = false0;

2275

unsigned val_offset = 0;

2276

uint64_t val_len = 0;

2277

const uint8_t *val_str = NULL((void*)0);

2278

2279

2280

/* https://datatracker.ietf.org/doc/html/rfc9204#name-insert-with-literal-name

2281

*

2282

* 0 1 2 3 4 5 6 7

2283

* +---+---+---+---+---+---+---+---+

2284

* | 0 | 1 | H | Name Length (5+) |

2285

* +---+---+---+-------------------+

2286

* | Name String (Length bytes) |

2287

* +---+---------------------------+

2288

* | H | Value Length (7+) |

2289

* +---+---------------------------+

2290

* | Value String (Length bytes) |

2291

* +-------------------------------+

2292

*/

2293

2294

/* Read the 5-encoded name length and set the name offset for subsequent dissection */

2295

varint_len = read_qpack_prefixed_integer(tvb, offset, 5, &name_len, &name_huffman);

2296

if (varint_len == 0) {

2297

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2298

}

2299

/* XXX - If name_len > UINT32_MAX, fail with expert info? */

2300

offset += varint_len;

2301

name_offset = offset;

2302

offset += (uint32_t)name_len;

2303

2304

/* Read the 7-encoded value length and set the value offset for subsequent dissection */

2305

varint_len = read_qpack_prefixed_integer(tvb, offset, 7, &val_len, &val_huffman);

2306

if (varint_len == 0) {

2307

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2308

}

2309

/* XXX - If val_len > UINT32_MAX, fail with expert info? */

2310

offset += varint_len;

2311

val_offset = offset;

2312

offset += (uint32_t)val_len;

2313

2314

/* Update the instruction length */

2315

inst_len = offset - inst_offset;

2316

2317

/* Add the protocol tree items */

2318

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_encoder_opcode_insert,

2319

tvb, inst_offset, inst_len, ENC_NA0x00000000);

2320

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2321

2322

if (name_huffman) {

2323

huffman_ti = proto_tree_add_item(opcode_tree, hf_http3_qpack_encoder_opcode_insert_hname,

2324

tvb, name_offset, (uint32_t)name_len, ENC_NA0x00000000);

2325

decoded_tvb = tvb_child_uncompress_hpack_huff(tvb, name_offset, (unsigned)name_len);

2326

if (decoded_tvb) {

2327

add_new_data_source(pinfo, decoded_tvb, "Decoded QPACK Name");

2328

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_name,

2329

decoded_tvb, 0, tvb_captured_length(decoded_tvb), ENC_NA0x00000000, pinfo->pool, &name_str);

2330

} else {

2331

expert_add_info(pinfo, huffman_ti, &ei_http3_huffman_failed);

2332

name_str = (const uint8_t*)"???";

2333

}

2334

} else {

2335

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_name,

2336

tvb, name_offset,(uint32_t)name_len, ENC_NA0x00000000, pinfo->pool, &name_str);

2337

}

2338

2339

if (val_huffman) {

2340

huffman_ti = proto_tree_add_item(opcode_tree, hf_http3_qpack_encoder_opcode_insert_hval,

2341

tvb, val_offset,(uint32_t)val_len, ENC_NA0x00000000);

2342

decoded_tvb = tvb_child_uncompress_hpack_huff(tvb, val_offset, (unsigned)val_len);

2343

if (decoded_tvb) {

2344

add_new_data_source(pinfo, decoded_tvb, "Decoded QPACK Value");

2345

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_val,

2346

decoded_tvb, 0, tvb_captured_length(decoded_tvb), ENC_NA0x00000000, pinfo->pool, &val_str);

2347

} else {

2348

expert_add_info(pinfo, huffman_ti, &ei_http3_huffman_failed);

2349

val_str = (const uint8_t*)"???";

2350

}

2351

} else {

2352

proto_tree_add_item_ret_string(opcode_tree, hf_http3_qpack_encoder_opcode_insert_val,

2353

tvb, val_offset,(uint32_t)val_len, ENC_NA0x00000000, pinfo->pool, &val_str);

2354

}

2355

2356

instr_buf = wmem_strbuf_new(pinfo->pool, "INSERT");

2357

wmem_strbuf_append_printf(instr_buf, "[%s=%s]", name_str, val_str);

2358

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2359

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2360

} else if (opcode & QPACK_OPCODE_SET_DTABLE_CAP0x20) {

2361

uint64_t dynamic_capacity = 0;

2362

2363

/* https://datatracker.ietf.org/doc/html/rfc9204#name-set-dynamic-table-capacity

2364

*

2365

* 0 1 2 3 4 5 6 7

2366

* +---+---+---+---+---+---+---+---+

2367

* | 0 | 0 | 1 | Capacity (5+) |

2368

* +---+---+---+-------------------+

2369

*/

2370

2371

/* Read the 5-encoded table capacity */

2372

varint_len = read_qpack_prefixed_integer(tvb, offset, 5, &dynamic_capacity, NULL((void*)0));

2373

if (varint_len == 0) {

2374

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2375

}

2376

offset += varint_len;

2377

2378

/* Update the instruction length */

2379

inst_len = offset - inst_offset;

2380

2381

/* Add the protocol tree items */

2382

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_encoder_opcode_dtable_cap,

2383

tvb, inst_offset,inst_len, ENC_NA0x00000000);

2384

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2385

proto_tree_add_uint64(opcode_tree, hf_http3_qpack_encoder_opcode_dtable_cap_val,

2386

tvb, inst_offset, inst_len,dynamic_capacity);

2387

2388

instr_buf = wmem_strbuf_new(pinfo->pool, "DTABLE_CAP");

2389

wmem_strbuf_append_printf(instr_buf, "[%" PRIu64"l" "u" "]", dynamic_capacity);

2390

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2391

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2392

} else if (opcode == QPACK_OPCODE_DUPLICATE0x00) {

2393

uint64_t duplicate_of = 0;

2394

2395

/* https://datatracker.ietf.org/doc/html/rfc9204#name-duplicate

2396

*

2397

* 0 1 2 3 4 5 6 7

2398

* +---+---+---+---+---+---+---+---+

2399

* | 0 | 0 | 0 | Index (5+) |

2400

* +---+---+---+-------------------+

2401

*/

2402

2403

/* Read the 5-encoded index of a duplicate instruction */

2404

varint_len = read_qpack_prefixed_integer(tvb, offset, 5, &duplicate_of, NULL((void*)0));

2405

if (varint_len == 0) {

2406

THROW(ScsiBoundsError)except_throw(1, (7), ((void*)0));

2407

}

2408

offset += varint_len;

2409

2410

/* Update the instruction length */

2411

inst_len = offset - inst_offset;

2412

2413

/* Add the protocol tree items */

2414

proto_tree_add_item(tree, hf_http3_qpack_encoder_opcode_duplicate,

2415

tvb, inst_offset, inst_len, ENC_NA0x00000000);

2416

2417

instr_buf = wmem_strbuf_new(pinfo->pool, "DUPLICATE");

2418

wmem_strbuf_append_printf(instr_buf, "[%" PRIu64"l" "u" "]", duplicate_of);

2419

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2420

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2421

} else {

2422

ws_debug("Opcode=%" PRIu8 ": UNKNOWN", opcode)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2422, __func__, "Opcode=%" "hhu" ": UNKNOWN", opcode); } } while
(0);

2423

can_continue = false0;

2424

}

2425

/* Increment the instruction count */

2426

icnt ++;

2427

}

2428

CATCH(ScsiBoundsError)if (except_state == 0 && exc != 0 && exc->
except_id.except_code == (7) && (except_state |= 1)) {

2429

/* This is obviously not SCSI, but we use a bounds type error

2430

* which the main API won't throw. This too large integer is

2431

* possibly a QUIC reassembly error or the payload not actually

2432

* being HTTP/3. */

2433

proto_tree_add_expert(tree, pinfo, &ei_http3_prefix_int_failed, tvb, offset, 1);

2434

/* Above won't throw an exception because we would have thrown

2435

* an error retrieving the first octet of the prefixed integer. */

2436

offset = end_offset;

2437

can_continue = false0;

2438

}

2439

CATCH(ReportedBoundsError)if (except_state == 0 && exc != 0 && exc->
except_id.except_code == (3) && (except_state |= 1)) {

2440

/* We could not parse the last instruction, hence update `decoded' accordingly. */

2441

ws_debug("%u: Could not parse last instruction, rolling back parsing offset from %d to %d",do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2442, __func__, "%u: Could not parse last instruction, rolling back parsing offset from %d to %d"
, pinfo->num, offset, inst_offset); } } while (0)

2442

pinfo->num, offset, inst_offset)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2442, __func__, "%u: Could not parse last instruction, rolling back parsing offset from %d to %d"
, pinfo->num, offset, inst_offset); } } while (0);

2443

offset = inst_offset;

2444

can_continue = false0;

2445

}

2446

ENDTRYif(!(except_state&1) && exc != 0) except_rethrow(
exc); except_free(except_ch.except_obj.except_dyndata); except_pop
(); };};

2447

}

2448

2449

if (icnt && have_tap_listener(http3_follow_tap)) {

2450

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

2451

2452

follow_data->tvb = tvb_new_child_real_data(tvb,

2453

(const uint8_t*)wmem_strbuf_get_str(follow_buf),

2454

(unsigned)wmem_strbuf_get_len(follow_buf),

2455

(unsigned)wmem_strbuf_get_len(follow_buf));

2456

follow_data->stream_id = http3_stream->id;

2457

follow_data->from_server = http3_stream->direction;

2458

2459

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

2460

}

2461

2462

*picnt = icnt;

2463

return offset - start_offset;

2464

}

2465

2466

static int

2467

dissect_http3_qpack_enc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,

2468

quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

2469

{

2470

int remaining;

2471

int remaining_captured;

2472

int retval;

2473

2474

remaining_captured = tvb_captured_length_remaining(tvb, offset);

2475

remaining = tvb_reported_length_remaining(tvb, offset);

2476

retval = remaining;

2477

2478

DISSECTOR_ASSERT(remaining_captured == remaining)((void) ((remaining_captured == remaining) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 2478, "remaining_captured == remaining"))));

2479

2480

if (remaining > 0) {

2481

http3_session_info_t *http3_session;

2482

proto_item *qpack_update;

2483

proto_tree *qpack_update_tree;

2484

int decoded;

2485

int icnt;

2486

2487

http3_session = http3_session_lookup_or_create(pinfo);

2488

DISSECTOR_ASSERT(http3_session)((void) ((http3_session) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 2488, "http3_session"))));

2489

2490

/*

2491

* Add a QPACK encoder tree item.

2492

*/

2493

qpack_update = proto_tree_add_item(tree, hf_http3_qpack_encoder, tvb, offset, remaining, ENC_NA0x00000000);

2494

qpack_update_tree = proto_item_add_subtree(qpack_update, ett_http3_qpack_update);

2495

decoded = dissect_http3_qpack_encoder_stream(tvb, pinfo, qpack_update_tree, offset,

2496

http3_stream, &icnt);

2497

2498

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

2499

ws_debug("decode encoder stream: Wireshark decoded=%u of %u", decoded, remaining)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2499, __func__, "decode encoder stream: Wireshark decoded=%u of %u"
, decoded, remaining); } } while (0);

2500

}

2501

if (decoded < remaining) {

2502

pinfo->desegment_offset = offset + decoded;

2503

pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;

2504

}

2505

2506

col_append_sep_fstr(pinfo->cinfo, COL_INFO, ", ", "QPACK ENC[%d]", icnt);

2507

2508

#ifdef HAVE_NGHTTP31

2509

http3_stream_dir packet_direction = http3_packet_get_direction(stream_info);

2510

nghttp3_qpack_decoder *decoder = http3_session->qpack_decoder[packet_direction];

2511

proto_item *ti = NULL((void*)0);

2512

http3_qpack_encoder_state_t *encoder_state = http3_get_qpack_encoder_state(pinfo, tvb, offset);

2513

2514

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

2515

/*

2516

* Since we are now defragmenting, pass only the number of bytes

2517

* decoded to the nghttp3_qpack_decoder. Otherwise, we'll end up

2518

* sending the same bytes to the decoder again when the packet

2519

* is defragmented.

2520

*/

2521

uint8_t *qpack_buf = (uint8_t *)tvb_memdup(pinfo->pool, tvb, offset, decoded);

2522

int qpack_buf_len = decoded;

2523

2524

/*

2525

* Get the instr count prior to processing the data.

2526

*/

2527

uint64_t icnt_before = nghttp3_qpack_decoder_get_icnt(decoder);

2528

2529

encoder_state->nread = nghttp3_qpack_decoder_read_encoder(decoder, qpack_buf, qpack_buf_len);

2530

encoder_state->icnt = nghttp3_qpack_decoder_get_icnt(decoder);

2531

encoder_state->icnt_inc = (uint32_t)(encoder_state->icnt - icnt_before);

2532

2533

ws_debug("decode encoder stream: decoder=%p nread=%td new insertions=%u total insertions=%" PRIu64,do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2534, __func__, "decode encoder stream: decoder=%p nread=%td new insertions=%u total insertions=%"
"l" "u", decoder, encoder_state->nread, encoder_state->
icnt_inc, encoder_state->icnt); } } while (0)

2534

decoder, encoder_state->nread, encoder_state->icnt_inc, encoder_state->icnt)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2534, __func__, "decode encoder stream: decoder=%p nread=%td new insertions=%u total insertions=%"
"l" "u", decoder, encoder_state->nread, encoder_state->
icnt_inc, encoder_state->icnt); } } while (0);

2535

}

2536

2537

/* nghttp3_qpack_decoder_read_encoder() returns a nghttp3_ssize

2538

* (ptrdiff_t), negative in the case of errors, but nghttp3_strerror()

2539

* accepts int instead.

2540

*/

2541

if (encoder_state->nread < 0) {

2542

quic_cid_t quic_cid = {.len = 0};

2543

bool_Bool initial_cid_found = quic_conn_data_get_conn_client_dcid_initial(pinfo, &quic_cid);

2544

proto_tree_add_expert_format(tree, pinfo, &ei_http3_qpack_failed, tvb, offset, 0,

2545

"QPACK decoder %p DCID %s [found=%d] error %d (%s)",

2546

decoder, cid_to_string(&quic_cid, pinfo->pool), initial_cid_found,

2547

(int)encoder_state->nread, nghttp3_strerror((int)encoder_state->nread));

2548

}

2549

2550

proto_item_set_text(qpack_update, "QPACK encoder stream; %d instructions (%" PRIu64"l" "u" " total)",

2551

encoder_state->icnt_inc, encoder_state->icnt);

2552

ti = proto_tree_add_uint(qpack_update_tree, hf_http3_qpack_encoder_icnt_inc, tvb, offset, 0,

2553

encoder_state->icnt_inc);

2554

proto_item_set_generated(ti);

2555

ti = proto_tree_add_uint64(qpack_update_tree, hf_http3_qpack_encoder_icnt, tvb, offset, 0,

2556

encoder_state->icnt);

2557

proto_item_set_generated(ti);

2558

#else

2559

(void)stream_info;

2560

(void)qpack_update;

2561

(void)decoded;

2562

#endif /* HAVE_NGHTTP3 */

2563

}

2564

2565

return retval;

2566

}

2567

2568

static int

2569

dissect_http3_qpack_decoder_stream(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree,

2570

int start_offset, http3_stream_info_t *http3_stream, int *picnt)

2571

{

2572

unsigned end_offset; /* Sentinel offset past the buffer. */

2573

volatile bool_Bool can_continue; /* Flag to indicate that we can parse the next QPACK instruction */

2574

volatile int icnt; /* Number of dissected QPACK instructions */

2575

volatile unsigned offset; /* Current parsing offset, relative to the start of the tvb */

2576

2577

can_continue = true1;

2578

icnt = 0;

2579

offset = start_offset;

2580

end_offset = start_offset + tvb_captured_length_remaining(tvb, start_offset);

2581

2582

wmem_strbuf_t *follow_buf = wmem_strbuf_create(pinfo->pool)wmem_strbuf_new(pinfo->pool, "");

2583

wmem_strbuf_t *instr_buf;

2584

2585

while (offset < end_offset && can_continue) {

2586

int inst_offset; /* Starting offset of the currently parsed instruction in the tvb */

2587

int inst_len; /* Total length of the instruction */

2588

proto_item *opcode_ti;

2589

proto_tree *opcode_tree;

2590

2591

inst_offset = offset;

2592

2593

TRY{ except_t *volatile exc; volatile int except_state = 0; static
const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode
except_sn; struct except_catch except_ch; except_setup_try(&
except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch
.except_jmp)) *(&exc) = &except_ch.except_obj; else *
(&exc) = 0; if(except_state & 1) except_state |= 2; except_state
&= ~1; if (except_state == 0 && exc == 0) {

2594

uint8_t opcode; /* The instruction opcode */

2595

unsigned varint_len;

2596

2597

opcode = tvb_get_uint8(tvb, inst_offset) & QPACK_OPCODE_MASK0xE0;

2598

2599

ws_noisy("Decoding opcode=%" PRIu8 " decoded=%d start=%d current=%d end=%d",do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2600, __func__, "Decoding opcode=%" "hhu" " decoded=%d start=%d current=%d end=%d"
, opcode, (offset - start_offset), start_offset, offset, end_offset
); } } while (0)

2600

opcode, (offset - start_offset), start_offset, offset, end_offset)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2600, __func__, "Decoding opcode=%" "hhu" " decoded=%d start=%d current=%d end=%d"
, opcode, (offset - start_offset), start_offset, offset, end_offset
); } } while (0);

2601

2602

if (opcode & QPACK_OPCODE_SECTION_ACK0x80) {

2603

uint64_t stream_id = 0;

2604

2605

/* https://datatracker.ietf.org/doc/html/rfc9204#section-4.4.1

2606

*

2607

* 0 1 2 3 4 5 6 7

2608

* +---+---+---+---+---+---+---+---+

2609

* | 1 | Stream ID (7+) |

2610

* +---+---------------------------+

2611

*/

2612

2613

/* Read the 7-encoded name stream ID */

2614

varint_len = read_qpack_prefixed_integer(tvb, offset, 7, &stream_id, NULL((void*)0));

2615

if (varint_len == 0) {

2616

offset = end_offset;

2617

break;

2618

}

2619

offset += varint_len;

2620

2621

/* Update the instruction length */

2622

inst_len = offset - inst_offset;

2623

2624

/* Add the protocol tree items */

2625

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_decoder_opcode_section_ack,

2626

tvb, inst_offset, inst_len, ENC_NA0x00000000);

2627

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2628

proto_tree_add_uint64(opcode_tree, hf_http3_qpack_decoder_opcode_section_ack_stream_id,

2629

tvb, inst_offset, inst_len, stream_id);

2630

2631

instr_buf = wmem_strbuf_new(pinfo->pool, "SECTION_ACK");

2632

wmem_strbuf_append_printf(instr_buf, "[id=%" PRIu64"l" "u" "]", stream_id);

2633

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2634

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2635

} else if (opcode & QPACK_OPCODE_STREAM_CANCEL0x40) {

2636

uint64_t stream_id = 0;

2637

2638

/* https://datatracker.ietf.org/doc/html/rfc9204#section-4.4.2

2639

*

2640

* 0 1 2 3 4 5 6 7

2641

* +---+---+---+---+---+---+---+---+

2642

* | 0 | 1 | Stream ID (6+) |

2643

* +---+---+---+-------------------+

2644

*/

2645

2646

/* Read the 6-encoded name stream ID */

2647

varint_len = read_qpack_prefixed_integer(tvb, offset, 6, &stream_id, NULL((void*)0));

2648

if (varint_len == 0) {

2649

offset = end_offset;

2650

break;

2651

}

2652

offset += varint_len;

2653

2654

/* Update the instruction length */

2655

inst_len = offset - inst_offset;

2656

2657

/* Add the protocol tree items */

2658

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_decoder_opcode_cancel_stream,

2659

tvb, inst_offset, inst_len, ENC_NA0x00000000);

2660

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2661

proto_tree_add_uint64(opcode_tree, hf_http3_qpack_decoder_opcode_cancel_stream_id,

2662

tvb, inst_offset, inst_len,stream_id);

2663

2664

instr_buf = wmem_strbuf_new(pinfo->pool, "STREAM_CANCEL");

2665

wmem_strbuf_append_printf(instr_buf, "[id=%" PRIu64"l" "u" "]", stream_id);

2666

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2667

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2668

} else if (opcode == QPACK_OPCODE_ICNT_INCREMENT0x00) {

2669

uint64_t icnt_inc = 0;

2670

2671

/* https://datatracker.ietf.org/doc/html/rfc9204#section-4.4.3

2672

*

2673

* 0 1 2 3 4 5 6 7

2674

* +---+---+---+---+---+---+---+---+

2675

* | 0 | 0 | Increment (6+) |

2676

* +---+---+-----------------------+

2677

*/

2678

2679

/* Read the 6-encoded instruction count increment */

2680

varint_len = read_qpack_prefixed_integer(tvb, offset, 6, &icnt_inc, NULL((void*)0));

2681

if (varint_len == 0) {

2682

offset = end_offset;

2683

break;

2684

}

2685

offset += varint_len;

2686

2687

/* Update the instruction length */

2688

inst_len = offset - inst_offset;

2689

/* Add the protocol tree items */

2690

2691

opcode_ti = proto_tree_add_item(tree, hf_http3_qpack_decoder_opcode_icnt_increment,

2692

tvb, inst_offset, inst_len, ENC_NA0x00000000);

2693

opcode_tree = proto_item_add_subtree(opcode_ti, ett_http3_qpack_opcode);

2694

proto_tree_add_uint64(opcode_tree, hf_http3_qpack_decoder_opcode_icnt_increment_value,

2695

tvb, inst_offset, inst_len,icnt_inc);

2696

2697

instr_buf = wmem_strbuf_new(pinfo->pool, "ICNT_INC");

2698

wmem_strbuf_append_printf(instr_buf, "[%" PRIu64"l" "u" "]", icnt_inc);

2699

proto_item_set_text(opcode_ti, "%s", wmem_strbuf_get_str(instr_buf));

2700

wmem_strbuf_append_printf(follow_buf, "%s\n", wmem_strbuf_finalize(instr_buf));

2701

} else {

2702

ws_debug("Opcode=%" PRIu8 ": UNKNOWN", opcode)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2702, __func__, "Opcode=%" "hhu" ": UNKNOWN", opcode); } } while
(0);

2703

can_continue = false0;

2704

}

2705

/* Increment the instruction count */

2706

icnt ++;

2707

}

2708

CATCH(ReportedBoundsError)if (except_state == 0 && exc != 0 && exc->
except_id.except_code == (3) && (except_state |= 1)) {

2709

/* We could not parse the last instruction, hence roll back `parsing_offset' . */

2710

ws_noisy("Could not parse last instruction, rolling back parsing offset from %d to %d",do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2711, __func__, "Could not parse last instruction, rolling back parsing offset from %d to %d"
, offset, inst_offset); } } while (0)

2711

offset, inst_offset)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_NOISY, "epan/dissectors/packet-http3.c"
, 2711, __func__, "Could not parse last instruction, rolling back parsing offset from %d to %d"
, offset, inst_offset); } } while (0);

2712

offset = inst_offset;

2713

can_continue = false0;

2714

}

2715

ENDTRYif(!(except_state&1) && exc != 0) except_rethrow(
exc); except_free(except_ch.except_obj.except_dyndata); except_pop
(); };};

2716

}

2717

2718

if (icnt && have_tap_listener(http3_follow_tap)) {

2719

quic_follow_tap_data_t *follow_data = wmem_new0(pinfo->pool, quic_follow_tap_data_t)((quic_follow_tap_data_t*)wmem_alloc0((pinfo->pool), sizeof
(quic_follow_tap_data_t)));

2720

2721

follow_data->tvb = tvb_new_child_real_data(tvb,

2722

(const uint8_t*)wmem_strbuf_get_str(follow_buf),

2723

(unsigned)wmem_strbuf_get_len(follow_buf),

2724

(unsigned)wmem_strbuf_get_len(follow_buf));

2725

follow_data->stream_id = http3_stream->id;

2726

follow_data->from_server = http3_stream->direction;

2727

2728

tap_queue_packet(http3_follow_tap, pinfo, follow_data);

2729

}

2730

2731

*picnt = icnt;

2732

return offset - start_offset;

2733

}

2734

2735

static int

2736

dissect_http3_qpack_dec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,

2737

quic_stream_info *stream_info _U___attribute__((unused)), http3_stream_info_t *http3_stream)

2738

{

2739

int remaining;

2740

int remaining_captured;

2741

int retval;

2742

2743

remaining_captured = tvb_captured_length_remaining(tvb, offset);

2744

remaining = tvb_reported_length_remaining(tvb, offset);

2745

retval = remaining;

2746

2747

DISSECTOR_ASSERT(remaining_captured == remaining)((void) ((remaining_captured == remaining) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 2747, "remaining_captured == remaining"))));

2748

2749

if (remaining > 0) {

2750

http3_session_info_t *http3_session;

2751

proto_item *qpack_update;

2752

proto_tree *qpack_update_tree;

2753

int decoded;

2754

int icnt;

2755

2756

http3_session = http3_session_lookup_or_create(pinfo);

2757

DISSECTOR_ASSERT(http3_session)((void) ((http3_session) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http3.c"
, 2757, "http3_session"))));

2758

2759

/*

2760

* Add a QPACK encoder tree item.

2761

*/

2762

qpack_update = proto_tree_add_item(tree, hf_http3_qpack_decoder, tvb, offset, remaining, ENC_NA0x00000000);

2763

qpack_update_tree = proto_item_add_subtree(qpack_update, ett_http3_qpack_update);

2764

decoded = dissect_http3_qpack_decoder_stream(tvb, pinfo, qpack_update_tree, offset, http3_stream, &icnt);

2765

2766

col_append_sep_fstr(pinfo->cinfo, COL_INFO, ", ", "QPACK DEC[%d]", icnt);

2767

2768

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

2769

ws_debug("decode decoder stream: Wireshark decoded=%u of %u", decoded, remaining)do { if (1) { ws_log_full("HTTP3", LOG_LEVEL_DEBUG, "epan/dissectors/packet-http3.c"
, 2769, __func__, "decode decoder stream: Wireshark decoded=%u of %u"
, decoded, remaining); } } while (0);

2770

}

2771

if (decoded < remaining) {

2772

pinfo->desegment_offset = offset + decoded;

2773

pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;

2774

}

2775

retval = decoded;

2776

}

2777

2778

return retval;

2779

}

2780

2781

static int

2782

dissect_http3_client_bidi_stream(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,

2783

quic_stream_info *stream_info, http3_stream_info_t *http3_stream)

2784

{

2785

proto_item *ti_stream;

2786

proto_tree *stream_tree;

2787

2788

ti_stream = proto_tree_add_item(tree, hf_http3_stream_bidi, tvb, offset, 1, ENC_NA0x00000000);

2789

stream_tree = proto_item_add_subtree(ti_stream, ett_http3_stream_bidi);

2790

2791

while (tvb_reported_length_remaining(tvb, offset)) {

2792

if (!http3_check_frame_size(tvb, pinfo, offset)) {

2793

return tvb_captured_length(tvb);

2794

}

2795

offset = dissect_http3_frame(tvb, pinfo, stream_tree, offset, stream_info, http3_stream);

2796

}

2797

2798

return offset;

2799

}

2800

2801

static int

2802

dissect_http3_uni_stream(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, quic_stream_info *stream_info,

2803

http3_stream_info_t *http3_stream)

2804

{

2805

uint64_t stream_type;

2806

unsigned lenvar;

2807

proto_item *ti_stream, *ti_stream_type;

2808

proto_tree *stream_tree;

2809

const char *stream_display_name;

2810

2811

ti_stream = proto_tree_add_item(tree, hf_http3_stream_uni, tvb, offset, -1, ENC_NA0x00000000);

2812

stream_tree = proto_item_add_subtree(ti_stream, ett_http3_stream_uni);

2813

2814

if (stream_info->offset == 0) {

2815

ti_stream_type = proto_tree_add_item_ret_varint(stream_tree, hf_http3_stream_uni_type, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, &stream_type,

2816

&lenvar);

2817

offset += lenvar;

2818

http3_stream->uni_stream_type = stream_type;

2819

if (http3_is_reserved_code(stream_type)) {

2820

// Reserved to exercise requirement that unknown types are ignored.

2821

proto_item_set_text(ti_stream_type, "Stream Type: Reserved (%#" PRIx64"l" "x" ")", stream_type);

2822

stream_display_name = "Reserved (GREASE)";

2823

}

2824

else {

2825

stream_display_name = val64_to_str_wmem(pinfo->pool, stream_type, http3_stream_types, "Unknown (%#" PRIx64"l" "x" ")");

2826

}

2827

proto_item_set_text(ti_stream, "UNI STREAM: %s off=%" PRIu64"l" "u", stream_display_name, stream_info->stream_offset);

2828

} else {

2829

stream_type = http3_stream->uni_stream_type;

2830

/*ti_stream_type = proto_tree_add_item(stream_tree, hf_http3_stream_uni_type, tvb, offset, -1, ENC_BIG_ENDIAN);*/

2831

}

2832

2833

switch (stream_type) {

2834

case HTTP3_STREAM_TYPE_CONTROL:

2835

while (tvb_reported_length_remaining(tvb, offset)) {

2836

if (!http3_check_frame_size(tvb, pinfo, offset)) {

2837

return tvb_captured_length(tvb);

2838

}

2839

offset = dissect_http3_frame(tvb, pinfo, stream_tree, offset, stream_info, http3_stream);

2840

}

2841

break;

2842

case HTTP3_STREAM_TYPE_PUSH:

2843

// The remaining data of this stream consists of HTTP/3 frames.

2844

if (stream_info->offset == 0) {

2845

proto_tree_add_item_ret_varint(stream_tree, hf_http3_push_id, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, NULL((void*)0), &lenvar);

2846

offset += lenvar;

2847

}

2848

break;

2849

case HTTP3_STREAM_TYPE_QPACK_ENCODER:

2850

offset = dissect_http3_qpack_enc(tvb, pinfo, stream_tree, offset, stream_info, http3_stream);

2851

break;

2852

case HTTP3_STREAM_TYPE_QPACK_DECODER:

2853

offset = dissect_http3_qpack_dec(tvb, pinfo, stream_tree, offset, stream_info, http3_stream);

2854

break;

2855

case HTTP3_STREAM_TYPE_WEBTRANSPORT:

2856

// TODO

2857

offset = tvb_captured_length(tvb);

2858

break;

2859

default:

2860

// Unknown or reserved stream type, consume everything.

2861

if (!http3_is_reserved_code(stream_type)) {

2862

if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {

2863

http3_stream->broken_from_offset = stream_info->offset + offset;

2864

}

2865

report_unknown_stream_type(tvb, pinfo, stream_tree, offset, stream_info, http3_stream);

2866

}

2867

offset = tvb_captured_length(tvb);

2868

break;

2869

}

2870

2871

return offset;

2872

}

2873

2874

static proto_tree *

2875

start_http3_tree(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {

2876

proto_item * ti;

2877

2878

col_set_str(pinfo->cinfo, COL_PROTOCOL, "HTTP3");

2879

// Only clear the columns if this is the first HTTP/3 STREAM in the packet.

2880

if (proto_get_layer_num(pinfo, proto_http3) == 1) {

2881

col_clear(pinfo->cinfo, COL_INFO);

2882

}

2883

2884

ti = proto_tree_add_item(tree, proto_http3, tvb, 0, -1, ENC_NA0x00000000);

2885

return proto_item_add_subtree(ti, ett_http3);

2886

}

2887

2888

static int

2889

dissect_http3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)

2890

{

2891

quic_stream_info * stream_info = (quic_stream_info *)data;

2892

proto_tree * http3_tree;

2893

int offset = 0;

2894

http3_stream_info_t *http3_stream;

2895

http3_session_info_t *http3_session;

2896

bool_Bool from_server;

2897

2898

if (!stream_info) {

2899

return 0;

2900

}

2901

2902

/* XXX - Handle implementations where QUIC signals FIN in a QUIC frame that

2903

* has no HTTP/3 frames, and we don't get a Content-Length header either?

2904

* Unlike HTTP/1.1, there might be nothing for QUIC itself to reassemble,

2905

* since each HTTP/3 frame has a TPKT-like header with its own length.

2906

* So tvb might be length 0 here. We also might want to handle the case

2907

* where FIN is set but the length is too short for a frame. In that

2908

* case, it is more likely that more DATA will be forthcoming, or would

2909

* the QUIC stream just abruptly stop like a RESET_STREAM? For that matter,

2910

* should we try to reassemble any leftover data on a RESET_STREAM? */

2911

2912

switch (QUIC_STREAM_TYPE(stream_info->stream_id)((stream_info->stream_id) & 3U)) {

2913

case QUIC_STREAM_CLIENT_BIDI0:

2914

/* Used for HTTP requests and responses. */

2915

if (!http3_check_frame_size(tvb, pinfo, offset)) {

2916

return tvb_captured_length(tvb);

2917

}

2918

break;

2919

case QUIC_STREAM_SERVER_BIDI1:

2920

/* "HTTP/3 does not use server-initiated bidirectional streams,

2921

* though an extension could define a use for these streams." */

2922

break;

2923

case QUIC_STREAM_CLIENT_UNI2:

2924

case QUIC_STREAM_SERVER_UNI3:

2925

break;

2926

}

2927

2928

http3_tree = start_http3_tree(tvb, pinfo, tree);

2929

2930

/* We need a single HTTP/3 stream for both directions */

2931

from_server = stream_info->from_server;

2932

if (QUIC_STREAM_TYPE(stream_info->stream_id)((stream_info->stream_id) & 3U) == QUIC_STREAM_CLIENT_BIDI0 && from_server) {

2933

stream_info->from_server = false0;

2934

}

2935

http3_stream = (http3_stream_info_t *)quic_stream_get_proto_data(pinfo, stream_info);

2936

if (!http3_stream) {

2937

http3_stream = wmem_new0(wmem_file_scope(), http3_stream_info_t)((http3_stream_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(http3_stream_info_t)));

2938

quic_stream_add_proto_data(pinfo, stream_info, http3_stream);

2939

http3_stream->id = stream_info->stream_id;

2940

}

2941

if (QUIC_STREAM_TYPE(stream_info->stream_id)((stream_info->stream_id) & 3U) == QUIC_STREAM_CLIENT_BIDI0 && from_server) {

2942

stream_info->from_server = true1;

2943

}

2944

2945

http3_session = http3_session_lookup_or_create(pinfo);

2946

http3_session->current_stream = http3_stream;

2947

http3_stream->direction = http3_packet_get_direction(stream_info);

2948

2949

// If a STREAM has unknown data, everything afterwards cannot be dissected.

2950

if (http3_stream->broken_from_offset && http3_stream->broken_from_offset <= stream_info->offset + offset) {

2951

report_unknown_stream_type(tvb, pinfo, tree, offset, stream_info, http3_stream);

2952

return tvb_captured_length(tvb);

2953

}

2954

2955

switch (QUIC_STREAM_TYPE(stream_info->stream_id)((stream_info->stream_id) & 3U)) {

2956

case QUIC_STREAM_CLIENT_BIDI0:

2957

/* Used for HTTP requests and responses. */

2958

dissect_http3_client_bidi_stream(tvb, pinfo, http3_tree, offset, stream_info, http3_stream);

2959

break;

2960

2961

case QUIC_STREAM_SERVER_BIDI1:

2962

/* "HTTP/3 does not use server-initiated bidirectional streams,

2963

* though an extension could define a use for these streams." */

2964

// XXX expert info?

2965

return tvb_captured_length(tvb);

2966

2967

case QUIC_STREAM_CLIENT_UNI2:

2968

case QUIC_STREAM_SERVER_UNI3:

2969

dissect_http3_uni_stream(tvb, pinfo, http3_tree, offset, stream_info, http3_stream);

2970

break;

2971

}

2972

2973

return tvb_captured_length(tvb);

2974

}

2975

2976

static int

2977

dissect_http3_datagram(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) {

2978

quic_datagram_info * datagram_info = (quic_datagram_info *)data;

2979

uint64_t request_stream_id;

2980

proto_item * ti;

2981

proto_tree * http3_tree, * datragram_tree, * stream_id_tree;

2982

uint32_t lenvar;

2983

int offset = 0;

2984

2985

if (!datagram_info) {

2986

return 0;

2987

}

2988

2989

http3_tree = start_http3_tree(tvb, pinfo, tree);

2990

col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", "DATAGRAM");

2991

2992

ti = proto_tree_add_item(http3_tree, hf_http3_datagram, tvb, offset, -1, ENC_NA0x00000000);

2993

datragram_tree = proto_item_add_subtree(ti, ett_http3_datagram);

2994

2995

ti = proto_tree_add_item_ret_varint(datragram_tree, hf_http3_datagram_quarter_stream_id, tvb, offset, -1, ENC_VARINT_QUIC0x00000004, &request_stream_id, &lenvar);

2996

stream_id_tree = proto_item_add_subtree(ti, ett_http3_datagram_stream_id);

2997

2998

if (request_stream_id > ((1ULL << 60) - 1)) {

2999

proto_tree_add_expert_format(stream_id_tree, pinfo, &ei_http3_datagram_invalid_stream_id, tvb, offset, lenvar,

3000

"Quarter Stream ID is too big");

3001

return tvb_captured_length(tvb);

3002

}

3003

3004

request_stream_id = request_stream_id * 4;

3005

ti = proto_tree_add_uint64(stream_id_tree, hf_http3_datagram_request_stream_id, tvb, offset, lenvar, request_stream_id);

3006

proto_item_set_generated(ti);

3007

offset += lenvar;

3008

3009

proto_tree_add_item(datragram_tree, hf_http3_datagram_payload, tvb, offset, -1, ENC_NA0x00000000);

3010

3011

return tvb_captured_length(tvb);

3012

}

3013

3014

#ifdef HAVE_NGHTTP31

3015

static void

3016

register_static_headers(void)

3017

{

3018

header_fields_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL((void*)0));

3019

3020

/*

3021

* Here hf[x].hfinfo.name is a header method which is used as key

3022

* for matching ids while processing http3 packets.

3023

*/

3024

static hf_register_info hf[] = {

3025

{ &hf_http3_headers_authority,

3026

{ ":authority", "http3.headers.authority",

3027

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3028

"Authority portion of the target URI", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3029

},

3030

{ &hf_http3_headers_status,

3031

{ ":status", "http3.headers.status",

3032

FT_UINT16, BASE_DEC, NULL((void*)0), 0x0,

3033

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3034

},

3035

{ &hf_http3_headers_path,

3036

{ ":path", "http3.headers.path",

3037

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3038

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3039

},

3040

{ &hf_http3_headers_protocol,

3041

{ ":protocol", "http3.headers.protocol",

3042

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3043

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3044

},

3045

{ &hf_http3_headers_method,

3046

{ ":method", "http3.headers.method",

3047

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3048

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3049

},

3050

{ &hf_http3_headers_scheme,

3051

{ ":scheme", "http3.headers.scheme",

3052

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3053

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3054

},

3055

{ &hf_http3_headers_accept,

3056

{ "accept", "http3.headers.accept",

3057

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3058

"Media types that are acceptable to the user agent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3059

},

3060

{ &hf_http3_headers_accept_charset,

3061

{ "accept-charset", "http3.headers.accept_charset",

3062

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3063

"Acceptable charsets in textual responses for the user agent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3064

},

3065

{ &hf_http3_headers_accept_encoding,

3066

{ "accept-encoding", "http3.headers.accept_encoding",

3067

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3068

"Acceptable content codings (like compression) in responses for the user agent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3069

},

3070

{ &hf_http3_headers_accept_language,

3071

{ "accept-language", "http3.headers.accept_language",

3072

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3073

"Preferred natural languages for the user agent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3074

},

3075

{ &hf_http3_headers_accept_ranges,

3076

{ "accept-ranges", "http3.headers.accept_ranges",

3077

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3078

"Bytes range which server may use for partial data transfer", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3079

},

3080

{ &hf_http3_headers_access_control_allow_origin,

3081

{ "access-control-allow-origin", "http3.headers.access_control_allow_origin",

3082

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3083

"Origin control for cross-origin resource sharing", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3084

},

3085

{ &hf_http3_headers_age,

3086

{ "age", "http3.headers.age",

3087

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3088

"Time in seconds which was spent for transferring data through proxy", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3089

},

3090

{ &hf_http3_headers_allow,

3091

{ "allow", "http3.headers.allow",

3092

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3093

"List of allowed methods for request", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3094

},

3095

{ &hf_http3_headers_authorization,

3096

{ "authorization", "http3.headers.authorization",

3097

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3098

"Credentials for a server-side authorization", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3099

},

3100

{ &hf_http3_headers_cache_control,

3101

{ "cache-control", "http3.headers.cache_control",

3102

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3103

"Request or response directives for a cache control", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3104

},

3105

{ &hf_http3_headers_content_disposition,

3106

{ "content-disposition", "http3.headers.content_disposition",

3107

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3108

"Indicates that response will be displayed as page or downloaded with dialog box", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3109

},

3110

{ &hf_http3_headers_content_encoding,

3111

{ "content-encoding", "http3.headers.content_encoding",

3112

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3113

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3114

},

3115

{ &hf_http3_headers_content_language,

3116

{ "content-language", "http3.headers.content_language",

3117

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3118

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3119

},

3120

{ &hf_http3_headers_content_length,

3121

{ "content-length", "http3.headers.content_length",

3122

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3123

"Size of body in bytes", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3124

},

3125

{ &hf_http3_headers_content_location,

3126

{ "content-location", "http3.headers.content_location",

3127

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3128

"Alternative URL for a response data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3129

},

3130

{ &hf_http3_headers_content_range,

3131

{ "content-range", "http3.headers.content_range",

3132

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3133

"Range of bytes which was sent by server for partial data transfer", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3134

},

3135

{ &hf_http3_headers_content_type,

3136

{ "content-type", "http3.headers.content_type",

3137

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3138

"MIME type of response", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3139

},

3140

{ &hf_http3_headers_cookie,

3141

{ "cookie", "http3.headers.cookie",

3142

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3143

"Stored cookies", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3144

},

3145

{ &hf_http3_headers_date,

3146

{ "date", "http3.headers.date",

3147

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3148

"Date and time at which the data was originated", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3149

},

3150

{ &hf_http3_headers_etag,

3151

{ "etag", "http3.headers.etag",

3152

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3153

"Directive for version indication of resource", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3154

},

3155

{ &hf_http3_headers_expect,

3156

{ "expect", "http3.headers.expect",

3157

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3158

"Expectations that need to be fulfilled for correct request", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3159

},

3160

{ &hf_http3_headers_expires,

3161

{ "expires", "http3.headers.expires",

3162

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3163

"Data after which resource will be stale", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3164

},

3165

{ &hf_http3_headers_from,

3166

{ "from", "http3.headers.from",

3167

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3168

"Email of a person who responsible for a requesting data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3169

},

3170

{ &hf_http3_headers_if_match,

3171

{ "if-match", "http3.headers.if_match",

3172

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3173

"Mechanism for requesting data matched by a list of ETags", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3174

},

3175

{ &hf_http3_headers_if_modified_since,

3176

{ "if-modified-since", "http3.headers.if_modified_since",

3177

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3178

"Resource will be sent with status code 200 if it was modified otherwise with status code 304", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3179

},

3180

{ &hf_http3_headers_if_none_match,

3181

{ "if-none-match", "http3.headers.if_none_match",

3182

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3183

"Mechanism for requesting data not matched by a list of ETags", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3184

},

3185

{ &hf_http3_headers_if_range,

3186

{ "if-range", "http3.headers.if_range",

3187

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3188

"Mechanism for a range request which is used to check if a resource was modified", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3189

},

3190

{ &hf_http3_headers_if_unmodified_since,

3191

{ "if-unmodified-since", "http3.headers.if_unmodified_since",

3192

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3193

"Resource will be processed if it was not modified otherwise 412 error will be returned", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3194

},

3195

{ &hf_http3_headers_last_modified,

3196

{ "last-modified", "http3.headers.last_modified",

3197

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3198

"Date and time at which the origin server believes the resource was last modified", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3199

},

3200

{ &hf_http3_headers_link,

3201

{ "link", "http3.headers.link",

3202

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3203

"Mechanism for indicating that resource will be preloaded", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3204

},

3205

{ &hf_http3_headers_location,

3206

{ "location", "http3.headers.location",

3207

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3208

"Mechanism for indicating that client will be redirected", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3209

},

3210

{ &hf_http3_headers_max_forwards,

3211

{ "max-forwards", "http3.headers.max_forwards",

3212

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3213

"Mechanism for limiting the number of proxies", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3214

},

3215

{ &hf_http3_headers_proxy_authenticate,

3216

{ "proxy-authenticate", "http3.headers.proxy_authenticate",

3217

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3218

"Authentication method that should be used to gain access to a resource behind a proxy server", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3219

},

3220

{ &hf_http3_headers_proxy_authorization,

3221

{ "proxy-authorization", "http3.headers.proxy_authorization",

3222

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3223

"Credentials for a proxy-side authorization", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3224

},

3225

{ &hf_http3_headers_range,

3226

{ "range", "http3.headers.range",

3227

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3228

"Range of resource bytes that server should return", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3229

},

3230

{ &hf_http3_headers_referer,

3231

{ "referer", "http3.headers.referer",

3232

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3233

"Address of the previous web page", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3234

},

3235

{ &hf_http3_headers_refresh,

3236

{ "refresh", "http3.headers.refresh",

3237

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3238

"Time in seconds after which client will be redirected by given url", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3239

},

3240

{ &hf_http3_headers_retry_after,

3241

{ "retry-after", "http3.headers.retry_after",

3242

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3243

"Mechanism to indicate when resource expected to be available", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3244

},

3245

{ &hf_http3_headers_server,

3246

{ "server", "http3.headers.server",

3247

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3248

"Information about server software", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3249

},

3250

{ &hf_http3_headers_set_cookie,

3251

{ "set-cookie", "http3.headers.set_cookie",

3252

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3253

"Send a cookie to the client", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3254

},

3255

{ &hf_http3_headers_strict_transport_security,

3256

{ "strict-transport-security", "http3.headers.strict_transport_security",

3257

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3258

"HSTS indicates that resource should be accessed only using HTTPS", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3259

},

3260

{ &hf_http3_headers_user_agent,

3261

{ "user-agent", "http3.headers.user_agent",

3262

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3263

"Information about client software", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3264

},

3265

{ &hf_http3_headers_vary,

3266

{ "vary", "http3.headers.vary",

3267

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3268

"Mechanism for selecting which header will be used for content negotiation algorithm", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3269

},

3270

{ &hf_http3_headers_via,

3271

{ "via", "http3.headers.via",

3272

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3273

"Additional information for loop detection and protocol capabilities in proxy requests", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3274

},

3275

{ &hf_http3_headers_www_authenticate,

3276

{ "www-authenticate", "http3.headers.www_authenticate",

3277

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3278

"Authentication method that should be used to gain access to a resource", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3279

}

3280

};

3281

3282

char *header_name;

3283

for (unsigned i = 0; i < G_N_ELEMENTS(hf)(sizeof (hf) / sizeof ((hf)[0])); ++i) {

3284

header_name = g_strdup(hf[i].hfinfo.name)g_strdup_inline (hf[i].hfinfo.name);

3285

3286

g_hash_table_insert(header_fields_hash, header_name, &hf[i].hfinfo.id);

3287

}

3288

proto_register_field_array(proto_http3, hf, G_N_ELEMENTS(hf)(sizeof (hf) / sizeof ((hf)[0])));

3289

}

3290

#endif /* HAVE_NGHTTP3 */

3291

3292

void

3293

proto_register_http3(void)

3294

{

3295

expert_module_t *expert_http3;

3296

module_t *module_http3 _U___attribute__((unused));

3297

3298

static hf_register_info hf[] = {

3299

{ &hf_http3_stream_uni,

3300

{ "Uni Stream", "http3.stream.uni",

3301

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3302

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3303

},

3304

{ &hf_http3_stream_uni_type,

3305

{ "Uni Stream Type", "http3.stream_uni_type",

3306

FT_UINT64, BASE_HEX|BASE_VAL64_STRING0x00000400, VALS64(http3_stream_types)((0 ? (const struct _val64_string*)0 : ((http3_stream_types))
)), 0x0,

3307

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3308

},

3309

{ &hf_http3_stream_bidi,

3310

{ "Request Stream", "http3.stream",

3311

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3312

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3313

},

3314

{ &hf_http3_push_id,

3315

{ "Push ID", "http3.push_id",

3316

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3317

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3318

},

3319

{ &hf_http3_frame,

3320

{ "Frame", "http3.frame",

3321

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3322

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3323

},

3324

{ &hf_http3_frame_type,

3325

{ "Type", "http3.frame_type",

3326

FT_UINT64, BASE_HEX|BASE_VAL64_STRING0x00000400, VALS64(http3_frame_types)((0 ? (const struct _val64_string*)0 : ((http3_frame_types)))
), 0x0,

3327

"Frame Type", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3328

},

3329

{ &hf_http3_frame_streamid,

3330

{ "Stream ID", "http3.frame_streamid",

3331

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3332

"QUIC Stream id that this frame came in on", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3333

},

3334

{ &hf_http3_frame_length,

3335

{ "Length", "http3.frame_length",

3336

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3337

"Length of the Frame Payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3338

},

3339

{ &hf_http3_frame_payload,

3340

{ "Frame Payload", "http3.frame_payload",

3341

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3342

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3343

},

3344

3345

/* Data */

3346

{ &hf_http3_data,

3347

{ "Data", "http3.data",

3348

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3349

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3350

},

3351

{ &hf_http3_encoded_entity,

3352

{ "Content-encoded entity body", "http3.body.content_encoded",

3353

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3354

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3355

},

3356

/* Body fragments */

3357

{ &hf_http3_body_fragments,

3358

{ "Body fragments", "http3.body.fragments",

3359

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3360

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3361

},

3362

{ &hf_http3_body_fragment,

3363

{ "Body fragment", "http3.body.fragment",

3364

FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,

3365

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3366

},

3367

{ &hf_http3_body_fragment_overlap,

3368

{ "Body fragment overlap", "http3.body.fragment.overlap",

3369

FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,

3370

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3371

},

3372

{ &hf_http3_body_fragment_overlap_conflicts,

3373

{ "Body fragment overlapping with conflicting data", "http3.body.fragment.overlap.conflicts",

3374

FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,

3375

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3376

},

3377

{ &hf_http3_body_fragment_multiple_tails,

3378

{ "Body has multiple tail fragments", "http3.body.fragment.multiple_tails",

3379

FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,

3380

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3381

},

3382

{ &hf_http3_body_fragment_too_long_fragment,

3383

{ "Body fragment too long", "http3.body.fragment.too_long_fragment",

3384

FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,

3385

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3386

},

3387

{ &hf_http3_body_fragment_error,

3388

{ "Body defragment error", "http3.body.fragment.error",

3389

FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,

3390

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3391

},

3392

{ &hf_http3_body_fragment_count,

3393

{ "Body fragment count", "http3.body.fragment.count",

3394

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3395

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3396

},

3397

{ &hf_http3_body_reassembled_in,

3398

{ "Reassembled body in frame", "http3.body.reassembled.in",

3399

FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,

3400

"Reassembled body in frame number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3401

},

3402

{ &hf_http3_body_reassembled_length,

3403

{ "Reassembled body length", "http3.body.reassembled.length",

3404

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3405

"Reassembled body in frame number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3406

},

3407

{ &hf_http3_body_reassembled_data,

3408

{ "Reassembled body data", "http3.body.reassembled.data",

3409

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3410

"Reassembled body data for multisegment PDU spanning across DATAs", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3411

},

3412

3413

/* Headers */

3414

{ &hf_http3_headers_count,

3415

{ "Headers Count", "http3.headers.count",

3416

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3417

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3418

},

3419

{ &hf_http3_header,

3420

{ "Header", "http3.headers.header",

3421

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3422

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3423

},

3424

{ &hf_http3_headers_decoded_length,

3425

{ "Decoded Headers Length", "http3.headers.decoded_length",

3426

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3427

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3428

},

3429

{ &hf_http3_header_name_length,

3430

{ "Name Length", "http3.headers.header.name.length",

3431

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3432

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3433

},

3434

{ &hf_http3_header_name,

3435

{ "Name", "http3.header.header.name",

3436

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3437

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3438

},

3439

{ &hf_http3_header_value_length,

3440

{ "Value Length", "http3.headers.header.value.length",

3441

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3442

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3443

},

3444

{ &hf_http3_header_value,

3445

{ "Value", "http3.headers.header.value",

3446

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3447

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3448

},

3449

{ &hf_http3_header_request_full_uri,

3450

{ "Full request URI", "http3.request.full_uri",

3451

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3452

"The full requested URI (including host name)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3453

},

3454

3455

/* QPACK */

3456

{ &hf_http3_header_qpack_blocked,

3457

{ "HEADERS head-of-line-blocked on QPACK encoder stream", "http3.header.qpack.blocked",

3458

FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,

3459

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3460

},

3461

{ &hf_http3_header_qpack_blocked_stream_rcint,

3462

{ "Required instruction count", "http3.header.qpack.blocked.rcint",

3463

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3464

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3465

},

3466

{ &hf_http3_header_qpack_blocked_decoder_wicnt,

3467

{ "Available instruction count", "http3.header.qpack.blocked.wcint",

3468

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3469

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3470

},

3471

{ &hf_http3_qpack_encoder,

3472

{ "QPACK encoder", "http3.qpack.encoder",

3473

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3474

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3475

},

3476

{ &hf_http3_qpack_encoder_icnt,

3477

{ "QPACK encoder instruction count", "http3.qpack.encoder.icnt",

3478

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3479

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3480

},

3481

{ &hf_http3_qpack_encoder_icnt_inc,

3482

{ "QPACK encoder instruction count increment", "http3.qpack.encoder.icnt.inc",

3483

FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,

3484

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3485

},

3486

{ &hf_http3_qpack_encoder_opcode_insert_indexed,

3487

{ "Insert with Name Reference", "http3.qpack.encoder.opcode.insert_indexed",

3488

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3489

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3490

},

3491

{ &hf_http3_qpack_encoder_opcode_insert_indexed_ref,

3492

{ "Name Reference", "http3.qpack.encoder.opcode.insert_indexed.ref",

3493

FT_UINT64, BASE_HEX, NULL((void*)0), 0x0,

3494

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3495

},

3496

{ &hf_http3_qpack_encoder_opcode_insert_indexed_val,

3497

{ "Value", "http3.qpack.encoder.opcode.insert_indexed.val",

3498

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3499

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3500

},

3501

{ &hf_http3_qpack_encoder_opcode_insert_indexed_hval,

3502

{ "Value (Huffman)", "http3.qpack.encoder.opcode.insert_indexed.hval",

3503

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3504

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3505

},

3506

{ &hf_http3_qpack_encoder_opcode_insert,

3507

{ "Insert with Literal Name", "http3.qpack.encoder.opcode.insert",

3508

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3509

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3510

},

3511

{ &hf_http3_qpack_encoder_opcode_insert_name,

3512

{ "Literal Name", "http3.qpack.encoder.opcode.insert.name",

3513

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3514

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3515

},

3516

{ &hf_http3_qpack_encoder_opcode_insert_hname,

3517

{ "Literal Name (Huffman)", "http3.qpack.encoder.opcode.insert.hname",

3518

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3519

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3520

},

3521

{ &hf_http3_qpack_encoder_opcode_insert_val,

3522

{ "Value", "http3.qpack.encoder.opcode.insert.val",

3523

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3524

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3525

},

3526

{ &hf_http3_qpack_encoder_opcode_insert_hval,

3527

{ "Value (Huffman)", "http3.qpack.encoder.opcode.insert.hval",

3528

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3529

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3530

},

3531

{ &hf_http3_qpack_encoder_opcode_duplicate,

3532

{ "Duplicate", "http3.qpack.encoder.opcode.duplicate",

3533

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3534

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3535

},

3536

{ &hf_http3_qpack_encoder_opcode_dtable_cap,

3537

{ "Set Dynamic Table Capacity", "http3.qpack.encoder.opcode.dtable_cap",

3538

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3539

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3540

},

3541

{ &hf_http3_qpack_encoder_opcode_dtable_cap_val,

3542

{ "Capacity", "http3.qpack.encoder.opcode.dtable_cap.val",

3543

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3544

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3545

},

3546

{ &hf_http3_qpack_decoder,

3547

{ "QPACK decoder", "http3.qpack.decoder",

3548

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3549

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3550

},

3551

{ &hf_http3_qpack_decoder_opcode_section_ack,

3552

{ "Section ACK", "http3.qpack.decoder.opcode.section_ack",

3553

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3554

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3555

},

3556

{ &hf_http3_qpack_decoder_opcode_section_ack_stream_id,

3557

{ "Section ACK stream ID", "http3.qpack.decoder.opcode.section_ack.stream_id",

3558

FT_UINT64, BASE_HEX, NULL((void*)0), 0x0,

3559

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3560

},

3561

{ &hf_http3_qpack_decoder_opcode_cancel_stream,

3562

{ "Cancel stream", "http3.qpack.decoder.opcode.cancel_stream",

3563

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3564

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3565

},

3566

{ &hf_http3_qpack_decoder_opcode_cancel_stream_id,

3567

{ "Cancel stream stream ID", "http3.qpack.decoder.opcode.cancel_stream.id",

3568

FT_UINT64, BASE_HEX, NULL((void*)0), 0x0,

3569

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3570

},

3571

{ &hf_http3_qpack_decoder_opcode_icnt_increment,

3572

{ "Instruction count increment", "http3.qpack.decoder.opcode.icnt_inc",

3573

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3574

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3575

},

3576

{ &hf_http3_qpack_decoder_opcode_icnt_increment_value,

3577

{ "Instruction count increment value", "http3.qpack.decoder.opcode.icnt_inc.val",

3578

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3579

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3580

},

3581

3582

/* Settings */

3583

{ &hf_http3_settings,

3584

{ "Settings", "http3.settings",

3585

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3586

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3587

},

3588

{ &hf_http3_settings_identifier,

3589

{ "Settings Identifier", "http3.settings.id",

3590

FT_UINT64, BASE_HEX|BASE_VAL64_STRING0x00000400, VALS64(http3_settings_vals)((0 ? (const struct _val64_string*)0 : ((http3_settings_vals)
))), 0x0,

3591

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3592

},

3593

{ &hf_http3_settings_value,

3594

{ "Settings Value", "http3.settings.value",

3595

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3596

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3597

},

3598

{ &hf_http3_settings_qpack_max_table_capacity,

3599

{ "Max Table Capacity", "http3.settings.qpack.max_table_capacity",

3600

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3601

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3602

},

3603

{ &hf_http3_settings_max_field_section_size,

3604

{ "Max header list size", "http3.settings.max_field_section_size",

3605

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3606

"The default value is unlimited.", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3607

},

3608

{ &hf_http3_settings_qpack_blocked_streams,

3609

{ "Blocked Streams", "http3.settings.qpack.blocked_streams",

3610

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3611

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3612

},

3613

{ &hf_http3_settings_extended_connect,

3614

{ "Extended CONNECT", "http3.settings.extended_connect",

3615

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3616

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3617

},

3618

{ &hf_http3_settings_webtransport,

3619

{ "WebTransport", "http3.settings.webtransport",

3620

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3621

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3622

},

3623

{ &hf_http3_settings_h3_datagram,

3624

{ "H3 DATAGRAM", "http3.settings.h3_datagram",

3625

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3626

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3627

},

3628

{ &hf_http3_settings_h3_datagram_draft04,

3629

{ "H3 DATAGRAM Draft04", "http3.settings.h3_datagram_draft04",

3630

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3631

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3632

},

3633

3634

/* Priority Update */

3635

{ &hf_http3_priority_update_element_id,

3636

{ "Priority Update Element ID", "http3.priority_update_element_id",

3637

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3638

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3639

},

3640

{ &hf_http3_priority_update_field_value,

3641

{ "Priority Update Field Value", "http3.priority_update_field_value",

3642

FT_STRING, BASE_NONE, NULL((void*)0), 0x0,

3643

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3644

},

3645

3646

/* Datagram */

3647

{ &hf_http3_datagram,

3648

{ "Datagram", "http3.datagram",

3649

FT_NONE, BASE_NONE, NULL((void*)0), 0x0,

3650

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3651

},

3652

{ &hf_http3_datagram_quarter_stream_id,

3653

{ "Quarter Stream ID", "http3.datagram.quarter_stream_id",

3654

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3655

"Request stream id divided by 4", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3656

},

3657

{ &hf_http3_datagram_request_stream_id,

3658

{ "Associated Request Stream ID", "http3.datagram.request_stream_id",

3659

FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,

3660

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3661

},

3662

{ &hf_http3_datagram_payload,

3663

{ "Datagram Payload", "http3.datagram.payload",

3664

FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,

3665

NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }

3666

},

3667

};

3668

3669

static int *ett[] = {&ett_http3,

3670

&ett_http3_stream_uni,

3671

&ett_http3_stream_bidi,

3672

&ett_http3_frame,

3673

&ett_http3_body_fragment,

3674

&ett_http3_body_fragments,

3675

&ett_http3_encoded_entity,

3676

&ett_http3_settings,

3677

&ett_http3_headers,

3678

&ett_http3_headers_qpack_blocked,

3679

&ett_http3_qpack_update,

3680

&ett_http3_qpack_opcode,

3681

&ett_http3_datagram,

3682

&ett_http3_datagram_stream_id};

3683

3684

static ei_register_info ei[] = {

3685

{ &ei_http3_unknown_stream_type,

3686

{ "http3.unknown_stream_type", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3687

"An unknown stream type was encountered", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3688

},

3689

{ &ei_http3_qpack_failed,

3690

{ "http3.qpack_enc_failed", PI_UNDECODED0x05000000, PI_NOTE0x00400000,

3691

"Error decoding QPACK buffer", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3692

},

3693

{ &ei_http3_prefix_int_failed,

3694

{ "http3.prefix_int.failed", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3695

"Error decoding prefixed integer (too big)", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3696

},

3697

{ &ei_http3_huffman_failed,

3698

{ "http3.huffman.failed", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3699

"Error in Huffman decoding", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3700

},

3701

{ &ei_http3_header_encoded_state ,

3702

{ "http3.expert.header.encoded_state", PI_DEBUG0x08000000, PI_NOTE0x00400000,

3703

"HTTP3 header encoded block", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3704

},

3705

{ &ei_http3_header_decoding_failed ,

3706

{ "http3.expert.header_decoding.failed", PI_UNDECODED0x05000000, PI_NOTE0x00400000,

3707

"Failed to decode HTTP3 header name/value", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} }

3708

},

3709

{ &ei_http3_header_decoding_blocked,

3710

{ "http3.expert.header_decoding.blocked", PI_UNDECODED0x05000000, PI_NOTE0x00400000,

3711

"Failed to decode HTTP3 header name/value (blocked on QPACK)", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3712

},

3713

{ &ei_http3_header_decoding_no_output,

3714

{ "http3.expert.header_decoding.no_output", PI_UNDECODED0x05000000, PI_NOTE0x00400000,

3715

"Failed to decode HTTP3 header name/value (QPACK decoder no emission)", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3716

},

3717

/* Stopping due to excessive headers is possibly PI_SECURITY

3718

* (decompression bomb or other dangerous implemention). */

3719

{ &ei_http3_header_size,

3720

{ "http3.expert.header_decoding.header_size_exceeded", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3721

"QPACK decompression stopped after " G_STRINGIFY(QPACK_MAX_HEADER_SIZE)"1048576" " bytes", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3722

},

3723

{ &ei_http3_header_transfer_encoding,

3724

{ "http3.header.transfer_encoding", PI_PROTOCOL0x09000000, PI_WARN0x00600000,

3725

"The Transfer-Encoding header field MUST NOT be used in HTTP/3", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3726

},

3727

{ &ei_http3_body_decompression_failed,

3728

{ "http3.body.content_encoded.failed", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3729

"Unable to decompress content-encoded entity", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3730

},

3731

{ &ei_http3_datagram_invalid_stream_id,

3732

{ "http3.expert.datagram.invalid_stream_id", PI_UNDECODED0x05000000, PI_WARN0x00600000,

3733

"Failed to decode HTTP3 datagram stream id", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}}}

3734

},

3735

};

3736

3737

proto_http3 = proto_register_protocol("Hypertext Transfer Protocol Version 3", "HTTP3", "http3");

3738

3739

proto_register_field_array(proto_http3, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));

3740

proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));

3741

3742

module_http3 = prefs_register_protocol(proto_http3, NULL((void*)0));

3743

3744

expert_http3 = expert_register_protocol(proto_http3);

3745

expert_register_field_array(expert_http3, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));

3746

3747

http3_handle = register_dissector("http3", dissect_http3, proto_http3);

3748

http3_datagram_handle = register_dissector("http3.datagram", dissect_http3_datagram, proto_http3);

3749

#ifdef HAVE_NGHTTP31

3750

/* Fill hash table with static headers */

3751

register_static_headers();

3752

3753

#if defined(HAVE_ZLIB1) || defined(HAVE_ZLIBNG) || defined(HAVE_BROTLI1) || defined(HAVE_ZSTD1)

3754

prefs_register_bool_preference(module_http3, "decompress_body",

3755

"Decompress entity bodies",

3756

"Whether to decompress entity bodies that are compressed "

3757

"using \"Content-Encoding: \"",

3758

&http3_decompress_body);

3759

#else

3760

prefs_register_obsolete_preference(module_http3, "decompress_body");

3761

#endif

3762

3763

reassembly_table_register(&http3_body_reassembly_table,

3764

&quic_reassembly_table_functions);

3765

#endif

3766

3767

http3_follow_tap = register_tap("http3_follow");

3768

3769

/* Just use the QUIC functions for now, since the IDs are the same.

3770

* This may change once QUIC multipath is supported. */

3771

register_follow_stream(proto_http3, "http3_follow", quic_follow_conv_filter, quic_follow_index_filter, udp_follow_address_filter, udp_port_to_display, follow_quic_tap_listener, get_quic_connections_count, quic_get_sub_stream_id);

3772

}

3773

3774

void

3775

proto_reg_handoff_http3(void)

3776

{

3777

#ifdef HAVE_NGHTTP31

3778

media_type_dissector_table = find_dissector_table("media_type");

3779

#endif

3780

3781

dissector_add_string("quic.proto", "h3", http3_handle);

3782

dissector_add_string("quic.proto.datagram", "h3", http3_datagram_handle);

3783

}

3784

3785

/**

3786

* Implementation of helper functions.

3787

*/

3788

static http3_file_local_ctx *g_http3_file_local_ctx;

3789

3790

static unsigned

3791

http3_conn_info_hash(const void *key)

3792

{

3793

uint8_t bkey[QUIC_MAX_CID_LENGTH20];

3794

const quic_cid_t *v;

3795

unsigned h = 0;

3796

3797

if (key) {

3798

v = (const quic_cid_t *)key;

3799

memset(&bkey[0], 0, QUIC_MAX_CID_LENGTH20);

3800

memcpy(&bkey[0], &v->cid[0], MIN(v->len, QUIC_MAX_CID_LENGTH)(((v->len) < (20)) ? (v->len) : (20)));

3801

h = wmem_strong_hash(&bkey[0], QUIC_MAX_CID_LENGTH20);

3802

}

3803

return h;

3804

}

3805

3806

static gboolean

3807

http3_conn_info_equal(const void *lhs, const void *rhs)

3808

{

3809

const quic_cid_t *a = (const quic_cid_t *)lhs;

3810

const quic_cid_t *b = (const quic_cid_t *)rhs;

3811

size_t alen = a->len;

3812

size_t blen = b->len;

3813

3814

return alen == blen && memcmp(&a->cid[0], &b->cid[0], alen) == 0;

3815

}

3816

3817

#ifdef HAVE_NGHTTP31

3818

/* Due to QPACK compression, we may get lots of relatively large

3819

header decoded_header_fields (e.g., 4KiB). Allocating each of them requires lots

3820

of memory. The maximum compression is achieved in QPACK by

3821

referencing header field stored in dynamic table by one or two

3822

bytes. We reduce memory usage by caching header field in this

3823

wmem_map_t to reuse its memory region when we see the same header

3824

field next time. */

3825

3826

static size_t

3827

http3_hdrcache_length(const void *vv)

3828

{

3829

const uint8_t *v = (const uint8_t *)vv;

3830

uint32_t namelen, valuelen;

3831

3832

namelen = pntohu32(v);

3833

valuelen = pntohu32(v + sizeof(namelen) + namelen);

3834

3835

return namelen + sizeof(namelen) + valuelen + sizeof(valuelen);

3836

}

3837

3838

static unsigned

3839

http3_hdrcache_hash(const void *key)

3840

{

3841

return wmem_strong_hash((const uint8_t *)key, http3_hdrcache_length(key));

3842

}

3843

3844

static gboolean

3845

http3_hdrcache_equal(const void *lhs, const void *rhs)

3846

{

3847

const uint8_t *a = (const uint8_t *)lhs;

3848

const uint8_t *b = (const uint8_t *)rhs;

3849

size_t alen = http3_hdrcache_length(a);

3850

size_t blen = http3_hdrcache_length(b);

3851

3852

return alen == blen && memcmp(a, b, alen) == 0;

3853

}

3854

#endif

3855

3856

/* Deallocation callback */

3857

static bool_Bool

3858

http3_file_local_ctx_del_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data _U___attribute__((unused)))

3859

{

3860

g_http3_file_local_ctx = NULL((void*)0);

3861

return false0;

3862

}

3863

3864

static http3_file_local_ctx *

3865

http3_get_file_local_ctx(void)

3866

{

3867

if (g_http3_file_local_ctx == NULL((void*)0)) {

3868

/*

3869

* The file-local context hasn't been initialized yet

3870

* for the current file.

3871

*/

3872

g_http3_file_local_ctx = wmem_new(wmem_file_scope(), http3_file_local_ctx)((http3_file_local_ctx*)wmem_alloc((wmem_file_scope()), sizeof
(http3_file_local_ctx)));

3873

g_http3_file_local_ctx->conn_info_map =

3874

wmem_map_new(wmem_file_scope(), http3_conn_info_hash, http3_conn_info_equal);

3875

#ifdef HAVE_NGHTTP31

3876

g_http3_file_local_ctx->hdr_cache_map =

3877

wmem_map_new(wmem_file_scope(), http3_hdrcache_hash, http3_hdrcache_equal);

3878

#endif

3879

wmem_register_callback(wmem_file_scope(), http3_file_local_ctx_del_cb, NULL((void*)0));

3880

}

3881

3882

return g_http3_file_local_ctx;

3883

}

3884

3885

/*

3886

* Editor modelines - https://www.wireshark.org/tools/modelines.html

3887

*

3888

* Local variables:

3889

* c-basic-offset: 4

3890

* tab-width: 8

3891

* indent-tabs-mode: nil

3892

* End:

3893

*

3894

* vi: set shiftwidth=4 tabstop=8 expandtab:

3895

* :indentSize=4:tabSize=8:noTabs=true:

3896

*/

File:	builds/wireshark/wireshark/epan/dissectors/packet-http3.c
Warning:	line 1667, column 13 Value stored to 'datalen' is never read

Bug Summary

Annotated Source Code