Bug Summary

File:epan/dissectors/packet-cpfi.c
Warning:line 317, column 3
Value stored to 'length' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-cpfi.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/epan -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-truncation -Wno-format-nonliteral -Wno-pointer-sign -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2025-11-10-100318-3624-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-cpfi.c
1/* packet-cpfi.c
2 * Routines for CPFI Cross Point Frame Injector dissection
3 * CPFI - Cross Point Frame Injector is a CNT proprietary
4 * protocol used to carry Fibre Channel data over UDP
5 *
6 * Copyright 2003, Dave Sclarsky <dave_sclarsky[AT]cnt.com>
7 *
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
11 *
12 * Copied from packet-m2tp.c
13 * Thanks to Heinz Prantner for his motivation and assistance
14 *
15 * SPDX-License-Identifier: GPL-2.0-or-later
16 */
17
18#include "config.h"
19
20#include <epan/packet.h>
21#include <epan/prefs.h>
22#include "packet-fc.h"
23
24void proto_register_cpfi(void);
25void proto_reg_handoff_cpfi(void);
26
27#define CPFI_DEFAULT_UDP_PORT5000 5000 /* Not IANA registered */
28#define CPFI_DEFAULT_TTOT_UDP_PORT5001 5001 /* Not IANA registered */
29
30#define FIRST_TIO_CARD_ADDRESS0x380 0x380
31
32
33/* SOF defines */
34#define CPFI_FRAME_TYPE_MASK0xF0000000 0xF0000000
35#define CPFI_FRAME_TYPE_SHIFT28 28
36#define CPFI_SOURCE_MASK0x0FFC0000 0x0FFC0000
37#define CPFI_SOURCE_SHIFT18 18
38#define CPFI_DEST_MASK0x0003FF00 0x0003FF00
39#define CPFI_DEST_SHIFT8 8
40#define CPFI_SOF_TYPE_MASK0x000000F0 0x000000F0
41#define CPFI_SPEED_MASK0x0000000C 0x0000000C
42#define CPFI_OPM_ERROR_MASK0x00000002 0x00000002
43#define CPFI_FROM_LCM_MASK0x00000001 0x00000001
44
45/* EOF defines */
46#define CPFI_EOF_TYPE_MASK0x78000000 0x78000000
47#define CPFI_EOF_ERROR_MASK0x7FE00000 0x7FE00000
48
49/* configurable parameters */
50static unsigned gbl_cpfi_ttot_udp_port = CPFI_DEFAULT_TTOT_UDP_PORT5001;
51static bool_Bool cpfi_arrow_moves = true1;
52
53/* Initialize the protocol and registered fields */
54static int proto_cpfi;
55static int hf_cpfi_word_one;
56static int hf_cpfi_word_two;
57/* SOF word 1: */
58static int hf_cpfi_frame_type;
59static int hf_cpfi_source;
60static int hf_cpfi_dest;
61static int hf_cpfi_SOF_type;
62static int hf_cpfi_speed;
63static int hf_cpfi_OPM_error;
64static int hf_cpfi_from_LCM;
65/* EOF */
66static int hf_cpfi_CRC_32;
67static int hf_cpfi_EOF_type;
68/* Hidden items */
69static int hf_cpfi_t_instance;
70static int hf_cpfi_t_src_instance;
71static int hf_cpfi_t_dst_instance;
72static int hf_cpfi_t_board;
73static int hf_cpfi_t_src_board;
74static int hf_cpfi_t_dst_board;
75static int hf_cpfi_t_port;
76static int hf_cpfi_t_src_port;
77static int hf_cpfi_t_dst_port;
78
79static char src_str[20];
80static char dst_str[20];
81static const char l_to_r_arrow[] = "-->";
82static const char r_to_l_arrow[] = "<--";
83static const char *left = src_str;
84static const char *right = dst_str;
85static const char *arrow = l_to_r_arrow;
86static const char direction_and_port_string[] = "[%s %s %s] ";
87
88
89/* Initialize the subtree pointers */
90static int ett_cpfi;
91static int ett_cpfi_header;
92static int ett_cpfi_footer;
93
94static dissector_handle_t cpfi_handle;
95static dissector_handle_t fc_handle;
96
97
98static const value_string sof_type_vals[] = {
99 {0, "SOFf"},
100 {1, "SOFi2"},
101 {2, "SOFn2"},
102 {3, "SOFi3"},
103 {4, "SOFn3"},
104 {5, "SOFc1"},
105 {6, "SOFi1"},
106 {7, "SOFn1"},
107 {8, "SOFc4"},
108 {9, "SOFi4"},
109 {10, "SOFn4"},
110 {0, NULL((void*)0)},
111};
112
113static const value_string speed_vals[] = {
114 {0, "1 GBIT"},
115 {1, "2 GBIT"},
116 {2, "4 GBIT"},
117 {3, "10 GBIT"},
118 {0, NULL((void*)0)},
119};
120
121static const value_string eof_type_vals[] = {
122 {0, "EOFn"},
123 {1, "EOFt"},
124 {2, "EOFni"},
125 {3, "EOFa"},
126 {4, "EOFdt"},
127 {5, "EOFdti"},
128 {6, "EOFrt"},
129 {7, "EOFrti"},
130 {0, NULL((void*)0)},
131};
132
133/* Header */
134static void
135dissect_cpfi_header(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
136{
137 uint32_t word1;
138#if 0
139 uint32_t word2;
140#endif
141 uint32_t tda;
142 uint32_t src;
143 uint8_t src_instance = 0;
144 uint8_t src_board = 0;
145 uint8_t src_port = 0;
146 uint32_t dst;
147 uint8_t dst_instance = 0;
148 uint8_t dst_board = 0;
149 uint8_t dst_port = 0;
150 proto_tree *extra_tree = NULL((void*)0);
151
152 /* add a tree for the header */
153 if ( tree != NULL((void*)0))
154 {
155 proto_item *extra_item;
156 extra_item = proto_tree_add_protocol_format(tree, proto_cpfi, tvb, 0, -1, "Header");
157 extra_tree = proto_item_add_subtree(extra_item, ett_cpfi_header);
158 }
159
160 /* Extract the common header, and get the bits we need */
161 word1 = tvb_get_ntohl (tvb, 0);
162#if 0
163 word2 = tvb_get_ntohl (tvb, sizeof(word1));
164#endif
165
166 /* Figure out where the frame came from. dstTDA is source of frame! */
167 tda = (word1 & CPFI_DEST_MASK0x0003FF00) >> CPFI_DEST_SHIFT8;
168 if ( tda >= FIRST_TIO_CARD_ADDRESS0x380 )
169 {
170 (void) g_strlcpy(src_str, " CPFI", sizeof(src_str));
171 src = 0; /* Make it smallest */
172 }
173 else
174 {
175 const uint8_t *srcmac;
176
177 /* Make sure this is an Ethernet address. */
178 DISSECTOR_ASSERT(pinfo->src.type == AT_ETHER)((void) ((pinfo->src.type == AT_ETHER) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-cpfi.c"
, 178, "pinfo->src.type == AT_ETHER"))));
179 srcmac = (const uint8_t *)pinfo->src.data;
180
181 src_instance = srcmac[2]-1;
182 src_board = tda >> 4;
183 src_port = tda & 0x0f;
184 src = (1 << 24) + (src_instance << 16) + (src_board << 8) + src_port;
185 snprintf(src_str, sizeof(src_str), "%u.%u.%u", src_instance, src_board, src_port);
186 }
187
188 /* Figure out where the frame is going. srcTDA is destination of frame! */
189 tda = (word1 & CPFI_SOURCE_MASK0x0FFC0000) >> CPFI_SOURCE_SHIFT18;
190 if ( tda >= FIRST_TIO_CARD_ADDRESS0x380 )
191 {
192 (void) g_strlcpy(dst_str, " CPFI", sizeof(dst_str));
193 dst = 0; /* Make it smallest */
194 }
195 else
196 {
197 const uint8_t *dstmac;
198
199 /* Make sure this is an Ethernet address. */
200 DISSECTOR_ASSERT(pinfo->dst.type == AT_ETHER)((void) ((pinfo->dst.type == AT_ETHER) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-cpfi.c"
, 200, "pinfo->dst.type == AT_ETHER"))));
201 dstmac = (const uint8_t *)pinfo->dst.data;
202
203 dst_instance = dstmac[2]-1;
204 dst_board = tda >> 4;
205 dst_port = tda & 0x0f;
206 dst = (1 << 24) + (dst_instance << 16) + (dst_board << 8) + dst_port;
207 snprintf(dst_str, sizeof(dst_str), "%u.%u.%u", dst_instance, dst_board, dst_port);
208 }
209
210 /* Set up the source and destination and arrow per user configuration. */
211 if ( cpfi_arrow_moves && (dst < src) )
212 {
213 left = dst_str;
214 arrow = r_to_l_arrow;
215 right = src_str;
216 }
217 else
218 {
219 left = src_str;
220 arrow = l_to_r_arrow;
221 right = dst_str;
222 }
223
224 if (extra_tree) {
225 proto_item *hidden_item;
226 /* For "real" TDAs (i.e. not for microTDAs), add hidden addresses to allow filtering */
227 if ( src != 0 )
228 {
229 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_instance, tvb, 0, 1, &src_instance);
230 proto_item_set_hidden(hidden_item);
231 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_src_instance, tvb, 0, 1, &src_instance);
232 proto_item_set_hidden(hidden_item);
233 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_board, tvb, 0, 1, &src_board);
234 proto_item_set_hidden(hidden_item);
235 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_src_board, tvb, 0, 1, &src_board);
236 proto_item_set_hidden(hidden_item);
237 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_port, tvb, 0, 1, &src_port);
238 proto_item_set_hidden(hidden_item);
239 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_src_port, tvb, 0, 1, &src_port);
240 proto_item_set_hidden(hidden_item);
241 }
242 if ( dst != 0 )
243 {
244 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_instance, tvb, 0, 1, &dst_instance);
245 proto_item_set_hidden(hidden_item);
246 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_dst_instance, tvb, 0, 1, &dst_instance);
247 proto_item_set_hidden(hidden_item);
248 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_board, tvb, 0, 1, &dst_board);
249 proto_item_set_hidden(hidden_item);
250 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_dst_board, tvb, 0, 1, &dst_board);
251 proto_item_set_hidden(hidden_item);
252 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_port, tvb, 0, 1, &dst_port);
253 proto_item_set_hidden(hidden_item);
254 hidden_item = proto_tree_add_bytes(extra_tree, hf_cpfi_t_dst_port, tvb, 0, 1, &dst_port);
255 proto_item_set_hidden(hidden_item);
256 }
257
258 /* add word 1 components to the protocol tree */
259 proto_tree_add_item(extra_tree, hf_cpfi_word_one , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
260
261 proto_tree_add_item(extra_tree, hf_cpfi_frame_type, tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
262 proto_tree_add_item(extra_tree, hf_cpfi_source , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
263 proto_tree_add_item(extra_tree, hf_cpfi_dest , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
264 proto_tree_add_item(extra_tree, hf_cpfi_SOF_type , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
265 proto_tree_add_item(extra_tree, hf_cpfi_speed , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
266 proto_tree_add_item(extra_tree, hf_cpfi_OPM_error , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
267 proto_tree_add_item(extra_tree, hf_cpfi_from_LCM , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
268
269 /* add word 2 components to the protocol tree */
270 proto_tree_add_item(extra_tree, hf_cpfi_word_two , tvb, 4, 4, ENC_BIG_ENDIAN0x00000000);
271 };
272}
273
274/* Footer */
275static void
276dissect_cpfi_footer(tvbuff_t *tvb, proto_tree *tree)
277{
278 proto_tree *extra_tree = NULL((void*)0);
279
280 /* add a tree for the footer */
281 if ( tree != NULL((void*)0))
282 {
283 proto_item *extra_item;
284 extra_item = proto_tree_add_protocol_format(tree, proto_cpfi, tvb, 0, -1, "Footer");
285 extra_tree = proto_item_add_subtree(extra_item, ett_cpfi_footer);
286 }
287
288 if (extra_tree) {
289 proto_tree_add_item(extra_tree, hf_cpfi_CRC_32 , tvb, 0, 4, ENC_BIG_ENDIAN0x00000000);
290 proto_tree_add_item(extra_tree, hf_cpfi_EOF_type, tvb, 4, 4, ENC_BIG_ENDIAN0x00000000);
291 }
292}
293
294/* CPFI */
295static int
296dissect_cpfi(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U___attribute__((unused)))
297{
298 tvbuff_t *header_tvb, *body_tvb, *footer_tvb;
299 proto_item *cpfi_item = NULL((void*)0);
300 proto_tree *cpfi_tree = NULL((void*)0);
301 int length, reported_length, reported_body_length;
302 uint8_t frame_type;
303 fc_data_t fc_data;
304
305 frame_type = (tvb_get_ntohl (message_tvb, 0) & CPFI_FRAME_TYPE_MASK0xF0000000) >> CPFI_FRAME_TYPE_SHIFT28;
306
307 /* If this is not a CPFI frame, return 0 to let another dissector try to
308 * dissect it.
309 */
310 if ( !((frame_type == 9) && fc_handle) )
311 return 0;
312
313 /* If we don't have Ethernet addresses, can't do further dissection... */
314 if (pinfo->dst.type != AT_ETHER || pinfo->src.type != AT_ETHER)
315 return 0;
316
317 length = tvb_captured_length_remaining(message_tvb, 8);
Value stored to 'length' is never read
318 reported_length = tvb_reported_length_remaining(message_tvb, 8);
319 if (reported_length < 8)
320 {
321 /* We don't even have enough for the footer. */
322 return 0;
323 }
324
325 /* Length of packet, minus the footer. */
326 reported_body_length = reported_length - 8;
327 /* How much of that do we have in the tvbuff? */
328 length = tvb_captured_length_remaining(message_tvb, 8 + reported_body_length);
329 if (length < 0)
330 {
331 /* The footer wasn't captured at all.
332 XXX - we'd like to throw a BoundsError if that's the case. */
333 return 0;
334 }
335
336 /* In the interest of speed, if "tree" is NULL, don't do any work not
337 necessary to generate protocol tree items. */
338 if (tree) {
339 /* create the protocol tree */
340 cpfi_item = proto_tree_add_item(tree, proto_cpfi, message_tvb, 0, -1, ENC_NA0x00000000);
341 cpfi_tree = proto_item_add_subtree(cpfi_item, ett_cpfi);
342 }
343
344 /* Set up the frame controls - can we do better than this? */
345 fc_data.sof_eof = 0;
346 fc_data.sof_eof |= FC_DATA_SOF_FIRST_FRAME0x1;
347 fc_data.sof_eof |= FC_DATA_EOF_LAST_FRAME0x80;
348 fc_data.sof_eof |= FC_DATA_EOF_INVALID0x40;
349
350 /* dissect the message */
351
352 /* extract and process the header */
353 header_tvb = tvb_new_subset_length(message_tvb, 0, 8);
354 dissect_cpfi_header(header_tvb, pinfo, cpfi_tree);
355
356 body_tvb = tvb_new_subset_length(message_tvb, 8, reported_body_length);
357 fc_data.ethertype = ETHERTYPE_UNK0x0000;
358 call_dissector_with_data(fc_handle, body_tvb, pinfo, tree, &fc_data);
359
360 /* add more info, now that FC added its */
361 proto_item_append_text(cpfi_item, direction_and_port_string, left, arrow, right);
362 col_prepend_fstr(pinfo->cinfo, COL_INFO, direction_and_port_string, left, arrow, right);
363
364 /* Do the footer */
365 footer_tvb = tvb_new_subset_length(message_tvb, 8 + reported_body_length, 8);
366 dissect_cpfi_footer(footer_tvb, cpfi_tree);
367
368 return tvb_reported_length(message_tvb);
369}
370
371/* Register the protocol with Wireshark */
372void
373proto_register_cpfi(void)
374{
375 module_t *cpfi_module;
376
377 /* Setup list of header fields */
378 static hf_register_info hf[] = {
379
380 { &hf_cpfi_word_one,
381 { "Word one", "cpfi.word_one",
382 FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
383 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
384 { &hf_cpfi_word_two,
385 { "Word two", "cpfi.word_two",
386 FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
387 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
388
389 { &hf_cpfi_frame_type,
390 { "FrmType", "cpfi.frmtype",
391 FT_UINT32, BASE_HEX, NULL((void*)0), CPFI_FRAME_TYPE_MASK0xF0000000,
392 "Frame Type", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
393 { &hf_cpfi_source,
394 { "srcTDA", "cpfi.srcTDA",
395 FT_UINT32, BASE_HEX, NULL((void*)0), CPFI_SOURCE_MASK0x0FFC0000,
396 "Source TDA (10 bits)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
397 { &hf_cpfi_dest,
398 { "dstTDA", "cpfi.dstTDA",
399 FT_UINT32, BASE_HEX, NULL((void*)0), CPFI_DEST_MASK0x0003FF00,
400 "Source TDA (10 bits)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
401 { &hf_cpfi_SOF_type,
402 { "SOFtype", "cpfi.SOFtype",
403 FT_UINT32, BASE_HEX, VALS(sof_type_vals)((0 ? (const struct _value_string*)0 : ((sof_type_vals)))), CPFI_SOF_TYPE_MASK0x000000F0,
404 "SOF Type", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
405 { &hf_cpfi_speed,
406 { "speed", "cpfi.speed",
407 FT_UINT32, BASE_HEX, VALS(speed_vals)((0 ? (const struct _value_string*)0 : ((speed_vals)))), CPFI_SPEED_MASK0x0000000C,
408 "SOF Type", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
409 { &hf_cpfi_OPM_error,
410 { "OPMerror", "cpfi.OPMerror",
411 FT_BOOLEAN, 32, NULL((void*)0), CPFI_OPM_ERROR_MASK0x00000002,
412 "OPM Error?", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
413 { &hf_cpfi_from_LCM,
414 { "fromLCM", "cpfi.fromLCM",
415 FT_BOOLEAN, 32, NULL((void*)0), CPFI_FROM_LCM_MASK0x00000001,
416 "from LCM?", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
417
418 { &hf_cpfi_CRC_32,
419 { "CRC-32", "cpfi.crc-32",
420 FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
421 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
422
423 { &hf_cpfi_EOF_type,
424 { "EOFtype", "cpfi.EOFtype",
425 FT_UINT32, BASE_HEX, VALS(eof_type_vals)((0 ? (const struct _value_string*)0 : ((eof_type_vals)))), CPFI_EOF_TYPE_MASK0x78000000,
426 "EOF Type", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
427
428 { &hf_cpfi_t_instance,
429 { "Instance", "cpfi.instance",
430 FT_BYTES, BASE_NONE,
431 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
432
433 { &hf_cpfi_t_src_instance,
434 { "Source Instance", "cpfi.src_instance",
435 FT_BYTES, BASE_NONE,
436 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
437
438 { &hf_cpfi_t_dst_instance,
439 { "Destination Instance", "cpfi.dst_instance",
440 FT_BYTES, BASE_NONE,
441 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
442
443 { &hf_cpfi_t_board,
444 { "Board", "cpfi.board",
445 FT_BYTES, BASE_NONE,
446 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
447
448 { &hf_cpfi_t_src_board,
449 { "Source Board", "cpfi.src_board",
450 FT_BYTES, BASE_NONE,
451 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
452
453 { &hf_cpfi_t_dst_board,
454 { "Destination Board", "cpfi.dst_board",
455 FT_BYTES, BASE_NONE,
456 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
457
458 { &hf_cpfi_t_port,
459 { "Port", "cpfi.port",
460 FT_BYTES, BASE_NONE,
461 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
462
463 { &hf_cpfi_t_src_port,
464 { "Source Port", "cpfi.src_port",
465 FT_BYTES, BASE_NONE,
466 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
467
468 { &hf_cpfi_t_dst_port,
469 { "Destination Port", "cpfi.dst_port",
470 FT_BYTES, BASE_NONE,
471 NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
472 };
473
474
475 /* Setup protocol subtree array */
476 static int *ett[] = {
477 &ett_cpfi,
478 &ett_cpfi_header,
479 &ett_cpfi_footer
480 };
481
482
483 /* Register the protocol name and description */
484 proto_cpfi = proto_register_protocol("Cross Point Frame Injector", "CPFI", "cpfi");
485
486 /* Required function calls to register the header fields and subtrees used */
487 proto_register_field_array(proto_cpfi, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
488 proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
489
490 /* Register our configuration options for CPFI */
491 cpfi_module = prefs_register_protocol(proto_cpfi, proto_reg_handoff_cpfi);
492 prefs_register_uint_preference(cpfi_module, "udp.port2", "InstanceToInstance UDP Port",
493 "Set the port for InstanceToInstance messages (if other"
494 " than the default of 5001)",
495 10, &gbl_cpfi_ttot_udp_port);
496 prefs_register_bool_preference(cpfi_module, "arrow_ctl",
497 "Enable Active Arrow Control",
498 "Control the way the '-->' is displayed."
499 " When enabled, keeps the 'lowest valued' endpoint of the src-dest pair"
500 " on the left, and the arrow moves to distinguish source from dest."
501 " When disabled, keeps the arrow pointing right so the source of the frame"
502 " is always on the left.",
503 &cpfi_arrow_moves);
504
505 cpfi_handle = register_dissector("cpfi", dissect_cpfi, proto_cpfi);
506}
507
508void
509proto_reg_handoff_cpfi(void)
510{
511 static bool_Bool cpfi_init_complete = false0;
512 static unsigned cpfi_ttot_udp_port;
513
514 if ( !cpfi_init_complete )
515 {
516 fc_handle = find_dissector_add_dependency("fc", proto_cpfi);
517 dissector_add_uint_with_preference("udp.port", CPFI_DEFAULT_UDP_PORT5000, cpfi_handle);
518 cpfi_init_complete = true1;
519 }
520 else
521 {
522 dissector_delete_uint("udp.port", cpfi_ttot_udp_port, cpfi_handle);
523 }
524
525 cpfi_ttot_udp_port = gbl_cpfi_ttot_udp_port;
526
527 /* Port preference has a specific enough name to not use
528 the "auto" preference */
529 dissector_add_uint("udp.port", cpfi_ttot_udp_port, cpfi_handle);
530}
531
532/*
533 * Editor modelines
534 *
535 * Local Variables:
536 * c-basic-offset: 2
537 * tab-width: 8
538 * indent-tabs-mode: nil
539 * End:
540 *
541 * ex: set shiftwidth=2 tabstop=8 expandtab:
542 * :indentSize=2:tabSize=8:noTabs=true:
543 */