### Bug Summary

File: | epan/wslua/wslua_tree.c
Warning: | line 774, column 5 Undefined or garbage value returned to caller

### 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 wslua_tree.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 /usr/include/lua5.4 -isystem /builds/wireshark/wireshark/build/epan/wslua -isystem /builds/wireshark/wireshark/epan/wslua -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-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/2025-11-22-100314-3583-1 -x c /builds/wireshark/wireshark/epan/wslua/wslua_tree.c

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1 | /*
2 | * wslua_tree.c
3 | *
4 | * Wireshark's interface to the Lua Programming Language
5 | *
6 | * (c) 2006, Luis E. Garcia Ontanon <luis@ontanon.org>
7 | * (c) 2008, Balint Reczey <balint.reczey@ericsson.com>
8 | *
9 | * Wireshark - Network traffic analyzer
10 | * By Gerald Combs <gerald@wireshark.org>
11 | * Copyright 1998 Gerald Combs
12 | *
13 | * SPDX-License-Identifier: GPL-2.0-or-later
14 | */
15 |
16 | #include "config.h"
17 |
18 | /* WSLUA_MODULE Tree Adding Information To The Dissection Tree */
19 |
20 | #include "wslua.h"
21 | #include <epan/exceptions.h>
22 | #include <epan/show_exception.h>
23 |
24 | static int wslua_ett = -1;
25 |
26 | static GPtrArray* outstanding_TreeItem;
27 |
28 |
29 | /* pushing a TreeItem with a NULL item or subtree is completely valid for this function */
30 | TreeItem push_TreeItem(lua_State *L, proto_tree *tree, proto_item *item) {
31 | TreeItem ti = g_new(struct _wslua_treeitem, 1)((struct _wslua_treeitem *) g_malloc_n ((1), sizeof (struct _wslua_treeitem )));
32 |
33 | ti->tree = tree;
34 | ti->item = item;
35 | ti->expired = false0;
36 |
37 | g_ptr_array_add(outstanding_TreeItem, ti);
38 |
39 | return *(pushTreeItem(L,ti));
40 | }
41 |
42 | /* creates the TreeItem but does NOT push it into Lua */
43 | TreeItem create_TreeItem(proto_tree* tree, proto_item* item)
44 | {
45 | TreeItem tree_item = (TreeItem)g_malloc(sizeof(struct _wslua_treeitem));
46 | tree_item->tree = tree;
47 | tree_item->item = item;
48 | tree_item->expired = false0;
49 |
50 | return tree_item;
51 | }
52 |
53 | CLEAR_OUTSTANDING(TreeItem, expired, true)void clear_outstanding_TreeItem(void) { while (outstanding_TreeItem ->len) { TreeItem p = (TreeItem)g_ptr_array_remove_index_fast (outstanding_TreeItem,0); if (p) { if (p->expired != 1) p-> expired = 1; else g_free(p); } } }
54 |
55 | WSLUA_CLASS_DEFINE(TreeItem,FAIL_ON_NULL_OR_EXPIRED("TreeItem"))TreeItem toTreeItem(lua_State* L, int idx) { TreeItem* v = (TreeItem *)lua_touserdata (L, idx); if (!v) luaL_error(L, "bad argument %d (%s expected, got %s)" , idx, "TreeItem", lua_typename(L, lua_type(L, idx))); return v ? *v : ((void*)0); } TreeItem checkTreeItem(lua_State* L, int idx) { TreeItem* p; luaL_checktype(L,idx,7); p = (TreeItem*) luaL_checkudata(L, idx, "TreeItem"); if (!*p) { luaL_argerror (L,idx,"null " "TreeItem"); } else if ((*p)->expired) { luaL_argerror (L,idx,"expired " "TreeItem"); }; return p ? *p : ((void*)0); } TreeItem* pushTreeItem(lua_State* L, TreeItem v) { TreeItem * p; luaL_checkstack(L,2,"Unable to grow stack\n"); p = (TreeItem *)lua_newuserdatauv(L,sizeof(TreeItem),1); *p = v; (lua_getfield (L, (-1000000 - 1000), ("TreeItem"))); lua_setmetatable(L, -2 ); return p; }_Bool isTreeItem(lua_State* L,int i) { void *p; if(!lua_isuserdata(L,i)) return 0; p = lua_touserdata(L, i); lua_getfield(L, (-1000000 - 1000), "TreeItem"); if (p == ((void *)0) || !lua_getmetatable(L, i) || !lua_rawequal(L, -1, -2)) p =((void*)0); lua_settop(L, -(2)-1); return p ? 1 : 0; } TreeItem shiftTreeItem(lua_State* L,int i) { TreeItem* p; if(!lua_isuserdata (L,i)) return ((void*)0); p = (TreeItem*)lua_touserdata(L, i) ; lua_getfield(L, (-1000000 - 1000), "TreeItem"); if (p == (( void*)0) || !lua_getmetatable(L, i) || !lua_rawequal(L, -1, - 2)) p=((void*)0); lua_settop(L, -(2)-1); if (p) { (lua_rotate (L, (i), -1), lua_settop(L, -(1)-1)); return *p; } else return ((void*)0);} typedef int dummyTreeItem;
56 | /* <<lua_class_TreeItem,`TreeItem`>>s represent information in the https://www.wireshark.org/docs/wsug_html_chunked/ChUsePacketDetailsPaneSection.html[packet details] pane of Wireshark, and the packet details view of TShark.
57 | A <<lua_class_TreeItem,`TreeItem`>> represents a node in the tree, which might also be a subtree and have a list of children.
58 | The children of a subtree have zero or more siblings which are other children of the same <<lua_class_TreeItem,`TreeItem`>> subtree.
59 |
60 | During dissection, heuristic-dissection, and post-dissection, a root <<lua_class_TreeItem,`TreeItem`>> is passed to dissectors as the third argument of the function
61 | callback (e.g., `myproto.dissector(tvbuf,pktinfo,root)`).
62 |
63 | In some cases the tree is not truly added to, in order to improve performance.
64 | For example for packets not currently displayed/selected in Wireshark's visible
65 | window pane, or if TShark isn't invoked with the `-V` switch. However the
66 | "add" type <<lua_class_TreeItem,`TreeItem`>> functions can still be called, and still return <<lua_class_TreeItem,`TreeItem`>>
67 | objects - but the info isn't really added to the tree. Therefore you do not
68 | typically need to worry about whether there's a real tree or not. If, for some
69 | reason, you need to know it, you can use the <<lua_class_attrib_treeitem_visible,`TreeItem.visible`>> attribute getter
70 | to retrieve the state.
71 | */
72 |
73 | /* the following is used by TreeItem_add_packet_field() - this can THROW errors */
74 | static proto_item *
75 | try_add_packet_field(lua_State *L, TreeItem tree_item, TvbRange tvbr, const int hfid,
76 | const ftenum_t type, const unsigned encoding, int *ret_err)
77 | {
78 | int err = 0;
79 | proto_item *volatile item = NULL((void*)0);
80 | int endoff = 0;
81 |
82 | switch(type) {
83 | /* these all generate ByteArrays */
84 | case FT_BYTES:
85 | case FT_UINT_BYTES:
86 | case FT_OID:
87 | case FT_REL_OID:
88 | case FT_SYSTEM_ID:
89 | {
90 | /* GByteArray and its data will be g_free'd by Lua */
91 | GByteArray *gba = g_byte_array_new();
92 | item = proto_tree_add_bytes_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
93 | tvbr->offset, tvbr->len, encoding,
94 | gba, &endoff, &err);
95 | if (err == 0) {
96 | pushByteArray(L, gba);
97 | lua_pushinteger(L, endoff);
98 | }
99 | }
100 | break;
101 |
102 | case FT_ABSOLUTE_TIME:
103 | case FT_RELATIVE_TIME:
104 | {
105 | /* nstime_t will be g_free'd by Lua */
106 | nstime_t *nstime = g_new0(nstime_t, 1)((nstime_t *) g_malloc0_n ((1), sizeof (nstime_t)));
107 | item = proto_tree_add_time_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
108 | tvbr->offset, tvbr->len, encoding,
109 | nstime, &endoff, &err);
110 | if (err == 0) {
111 | pushNSTime(L,nstime);
112 | lua_pushinteger(L, endoff);
113 | }
114 | }
115 | break;
116 |
117 | case FT_INT8:
118 | case FT_INT16:
119 | case FT_INT24:
120 | case FT_INT32:
121 | {
122 | int32_t ret;
123 | item = proto_tree_add_item_ret_int(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
124 | tvbr->offset, tvbr->len, encoding,
125 | &ret);
126 | lua_pushinteger(L, (lua_Integer)ret);
127 | lua_pushinteger(L, tvbr->offset + tvbr->len);
128 | }
129 | break;
130 |
131 | case FT_INT40:
132 | case FT_INT48:
133 | case FT_INT56:
134 | case FT_INT64:
135 | {
136 | int64_t ret;
137 | item = proto_tree_add_item_ret_int64(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
138 | tvbr->offset, tvbr->len, encoding,
139 | &ret);
140 | pushInt64(L, ret);
141 | lua_pushinteger(L, tvbr->offset + tvbr->len);
142 | }
143 | break;
144 |
145 | case FT_CHAR:
146 | case FT_UINT8:
147 | case FT_UINT16:
148 | case FT_UINT24:
149 | case FT_UINT32:
150 | {
151 | uint32_t ret;
152 | item = proto_tree_add_item_ret_uint(tree_item-> tree, hfid, tvbr->tvb->ws_tvb,
153 | tvbr->offset, tvbr->len, encoding,
154 | &ret);
155 | lua_pushinteger(L, (lua_Integer)ret);
156 | lua_pushinteger(L, tvbr->offset + tvbr->len);
157 | }
158 | break;
159 |
160 | case FT_UINT40:
161 | case FT_UINT48:
162 | case FT_UINT56:
163 | case FT_UINT64:
164 | {
165 | uint64_t ret;
166 | item = proto_tree_add_item_ret_uint64(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
167 | tvbr->offset, tvbr->len, encoding,
168 | &ret);
169 | pushUInt64(L, ret);
170 | lua_pushinteger(L, tvbr->offset + tvbr->len);
171 | }
172 | break;
173 |
174 | case FT_BOOLEAN:
175 | {
176 | bool_Bool ret;
177 | item = proto_tree_add_item_ret_boolean(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
178 | tvbr->offset, tvbr->len, encoding,
179 | &ret);
180 | lua_pushboolean(L, ret);
181 | lua_pushinteger(L, tvbr->offset + tvbr->len);
182 | }
183 | break;
184 |
185 | case FT_STRING:
186 | {
187 | const uint8_t *ret;
188 | int len;
189 | item = proto_tree_add_item_ret_string_and_length(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
190 | tvbr->offset, tvbr->len, encoding,
191 | NULL((void*)0), &ret, &len);
192 | lua_pushstring(L, ret);
193 | lua_pushinteger(L, tvbr->offset + len);
194 | wmem_free(NULL((void*)0), (void*)ret);
195 | }
196 | break;
197 |
198 | case FT_STRINGZ:
199 | {
200 | const uint8_t *ret;
201 | int len;
202 | item = proto_tree_add_item_ret_string_and_length(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
203 | tvbr->offset, -1, encoding,
204 | NULL((void*)0), &ret, &len);
205 | lua_pushstring(L, ret);
206 | lua_pushinteger(L, tvbr->offset + len);
207 | wmem_free(NULL((void*)0), (void*)ret);
208 | }
209 | break;
210 |
211 | case FT_FLOAT:
212 | {
213 | float ret;
214 | item = proto_tree_add_item_ret_float(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
215 | tvbr->offset, tvbr->len, encoding,
216 | &ret);
217 | lua_pushnumber(L, (lua_Number)ret);
218 | lua_pushinteger(L, tvbr->offset + tvbr->len);
219 | }
220 | break;
221 |
222 | case FT_DOUBLE:
223 | {
224 | double ret;
225 | item = proto_tree_add_item_ret_double(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
226 | tvbr->offset, tvbr->len, encoding,
227 | &ret);
228 | lua_pushnumber(L, (lua_Number)ret);
229 | lua_pushinteger(L, tvbr->offset + tvbr->len);
230 | }
231 | break;
232 |
233 | case FT_IPv4:
234 | {
235 | Address addr = g_new(address,1)((address *) g_malloc_n ((1), sizeof (address)));
236 | ws_in4_addr ret;
237 | item = proto_tree_add_item_ret_ipv4(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
238 | tvbr->offset, tvbr->len, encoding,
239 | &ret);
240 | alloc_address_wmem(NULL((void*)0), addr, AT_IPv4, sizeof(ret), &ret);
241 | pushAddress(L, addr);
242 | lua_pushinteger(L, tvbr->offset + tvbr->len);
243 | }
244 | break;
245 |
246 | case FT_IPv6:
247 | {
248 | Address addr = g_new(address, 1)((address *) g_malloc_n ((1), sizeof (address)));
249 | ws_in6_addr ret;
250 | item = proto_tree_add_item_ret_ipv6(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
251 | tvbr->offset, tvbr->len, encoding,
252 | &ret);
253 | alloc_address_wmem(NULL((void*)0), addr, AT_IPv6, sizeof(ret), &ret);
254 | pushAddress(L, addr);
255 | lua_pushinteger(L, tvbr->offset + tvbr->len);
256 | }
257 | break;
258 |
259 | case FT_ETHER:
260 | {
261 | Address addr = g_new(address, 1)((address *) g_malloc_n ((1), sizeof (address)));
262 | uint8_t bytes[FT_ETHER_LEN6];
263 |
264 | item = proto_tree_add_item_ret_ether(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
265 | tvbr->offset, tvbr->len, encoding,
266 | bytes);
267 | alloc_address_wmem(NULL((void*)0), addr, AT_ETHER, sizeof(bytes), bytes);
268 | pushAddress(L, addr);
269 | lua_pushinteger(L, tvbr->offset + tvbr->len);
270 | }
271 | break;
272 |
273 | default:
274 | item = proto_tree_add_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, encoding);
275 | lua_pushnil(L);
276 | lua_pushnil(L);
277 | break;
278 | }
279 |
280 | if (ret_err) *ret_err = err;
281 |
282 | return item;
283 | }
284 |
285 | WSLUA_METHODstatic int TreeItem_add_packet_field(lua_State *L) {
286 | /*
287 | Adds a new child tree for the given <<lua_class_ProtoField,`ProtoField`>> object to this tree item,
288 | returning the new child <<lua_class_TreeItem,`TreeItem`>>.
289 |
290 | Unlike `TreeItem:add()` and `TreeItem:add_le()`, the <<lua_class_ProtoField,`ProtoField`>> argument
291 | is not optional, and cannot be a `Proto` object. Instead, this function always
292 | uses the <<lua_class_ProtoField,`ProtoField`>> to determine the type of field to extract from the
293 | passed-in `TvbRange`, highlighting the relevant bytes in the Packet Bytes pane
294 | of the GUI (if there is a GUI), etc. If no <<lua_class_TvbRange,`TvbRange`>>is given, no bytes are
295 | highlighted and the field's value cannot be determined; the <<lua_class_ProtoField,`ProtoField`>> must
296 | have been defined/created not to have a length in such a case, or an error will
297 | occur. For backwards-compatibility reasons the `encoding` argument, however,
298 | must still be given.
299 |
300 | Unlike `TreeItem:add()` and `TreeItem:add_le()`, this function performs both
301 | big-endian and little-endian decoding, by setting the `encoding` argument to
302 | be `ENC_BIG_ENDIAN` or `ENC_LITTLE_ENDIAN`.
303 |
304 | The signature of this function:
305 |
306 | [source,lua]
307 | ----
308 | tree_item:add_packet_field(proto_field [,tvbrange], encoding, ...)
309 | ----
310 |
311 | This function returns more than just the new child <<lua_class_TreeItem,`TreeItem`>>.
312 | The child is the first return value, so that function chaining will still work; but it
313 | also returns more information. The second return is the value of the extracted field
314 | (i.e., a number, `UInt64`, `Address`, etc.). The third return is is the offset where
315 | data should be read next. This is useful when the length of the field is not known in
316 | advance. The additional return values may be null if the field type is not well supported
317 | in the Lua API.
318 |
319 | This function can extract a <<lua_class_ProtoField,`ProtoField`>> of type `ftypes.BYTES`
320 | or `ftypes.ABSOLUTE_TIME` from a string in the `TvbRange` in ASCII-based and similar
321 | encodings. For example, a `ProtoField` of `ftypes.BYTES` can be extracted from a `TvbRange`
322 | containing the ASCII string "a1b2c3d4e5f6", and it will correctly decode the ASCII both in the
323 | tree as well as for the second return value, which will be a <<lua_class_ByteArray,`ByteArray`>>.
324 | To do so, you must set the `encoding` argument of this function to the appropriate string `ENC_*`
325 | value, bitwise-or'd (or added) with the `ENC_STR_HEX` value and one or more `ENC_SEP_XXX` values
326 | indicating which encodings are allowed. For `ftypes.ABSOLUTE_TIME`, one of the `ENC_ISO_8601_*`
327 | encodings or `ENC_IMF_DATE_TIME` must be used, and the second return value is a <<lua_class_NSTime,`NSTime`>>.
328 | Only single-byte ASCII digit string encodings such as `ENC_ASCII` and `ENC_UTF_8` can be used for this.
329 |
330 | For example, assuming the <<lua_class_Tvb,`Tvb`>> named "`tvb`" contains the string "abcdef"
331 | (61 62 63 64 65 66 in hex):
332 |
333 | [source,lua]
334 | ----
335 | -- this is done earlier in the script
336 | local myfield = ProtoField.new("Transaction ID", "myproto.trans_id", ftypes.BYTES)
337 | myproto.fields = { myfield }
338 |
339 | -- this is done inside a dissector, post-dissector, or heuristic function
340 | -- child will be the created child tree, and value will be the ByteArray "abcdef" or nil on failure
341 | local child, value = tree:add_packet_field(myfield, tvb:range(0,6), ENC_UTF_8 + ENC_STR_HEX + ENC_SEP_NONE)
342 | ----
343 |
344 | */
345 | #define WSLUA_ARG_TreeItem_add_packet_field_PROTOFIELD2 2 /* The ProtoField field object to add to the tree. */
346 | #define WSLUA_OPTARG_TreeItem_add_packet_field_TVBRANGE3 3 /* The <<lua_class_TvbRange,`TvbRange`>> of bytes in the packet this tree item covers/represents. */
347 | #define WSLUA_ARG_TreeItem_add_packet_field_ENCODING4 4 /* The field's encoding in the `TvbRange`. */
348 | #define WSLUA_OPTARG_TreeItem_add_packet_field_LABEL5 5 /* One or more strings to append to the created <<lua_class_TreeItem,`TreeItem`>>. */
349 | volatile TvbRange tvbr;
350 | ProtoField field;
351 | int hfid;
352 | volatile int ett;
353 | ftenum_t type;
354 | TreeItem tree_item = shiftTreeItem(L,1);
355 | unsigned encoding;
356 | proto_item* item = NULL((void*)0);
357 | volatile int nargs;
358 | volatile int err = 0;
359 | const char *volatile error = NULL((void*)0);
360 |
361 | if (!tree_item) {
362 | return luaL_error(L,"not a TreeItem!");
363 | }
364 | if (tree_item->expired) {
365 | luaL_error(L,"expired TreeItem");
366 | return 0;
367 | }
368 |
369 | if (! ( field = shiftProtoField(L,1) ) ) {
370 | luaL_error(L,"TreeField:add_packet_field not passed a ProtoField");
371 | return 0;
372 | }
373 | if (field->hfid == -2) {
374 | luaL_error(L, "ProtoField %s unregistered (not added to a Proto.fields attribute)", field->abbrev);
375 | }
376 | hfid = field->hfid;
377 | type = field->type;
378 | ett = field->ett;
379 |
380 | tvbr = shiftTvbRange(L,1);
381 | if (!tvbr) {
382 | /* No TvbRange specified */
383 | tvbr = wmem_new(lua_pinfo->pool, struct _wslua_tvbrange)((struct _wslua_tvbrange*)wmem_alloc((lua_pinfo->pool), sizeof (struct _wslua_tvbrange)));
384 | tvbr->tvb = wmem_new(lua_pinfo->pool, struct _wslua_tvb)((struct _wslua_tvb*)wmem_alloc((lua_pinfo->pool), sizeof( struct _wslua_tvb)));
385 | tvbr->tvb->ws_tvb = lua_tvb;
386 | tvbr->offset = 0;
387 | tvbr->len = 0;
388 | }
389 |
390 | encoding = wslua_checkuint(L,1)(unsigned) ( luaL_checkinteger(L,1) );
391 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
392 |
393 | /* get the number of additional args before we add more to the stack */
394 | nargs = lua_gettop(L);
395 |
396 | /* XXX: why is this being done? If the length was -1, FT_STRINGZ figures out
397 | * the right length in tvb_get_stringz_enc(); if it was 0, it should remain zero;
398 | * if it was greater than zero, then it's the length the caller wanted.
399 | */
400 | if (type == FT_STRINGZ) {
401 | switch (encoding & ENC_CHARENCODING_MASK0x0000FFFE) {
402 |
403 | case ENC_UTF_160x00000004:
404 | case ENC_UCS_20x00000006:
405 | tvbr->len = tvb_unicode_strsize (tvbr->tvb->ws_tvb, tvbr->offset);
406 | break;
407 |
408 | default:
409 | if (tvb_find_uint8 (tvbr->tvb->ws_tvb, tvbr->offset, -1, 0) == -1) {
410 | luaL_error(L,"out of bounds");
411 | return 0;
412 | }
413 | tvbr->len = tvb_strsize (tvbr->tvb->ws_tvb, tvbr->offset);
414 | break;
415 | }
416 | }
417 |
418 | 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) {
419 | int errx = 0;
420 | item = try_add_packet_field(L, tree_item, tvbr, hfid, type, encoding, &errx);
421 | err = errx;
422 | } CATCH_ALLif (except_state == 0 && exc != 0 && (except_state |=1)) {
423 | show_exception(tvbr->tvb->ws_tvb, lua_pinfo, tree_item->tree, EXCEPT_CODE((exc)->except_id.except_code), GET_MESSAGE((exc)->except_message));
424 | error = "Lua programming error";
425 | } ENDTRYif(!(except_state&1) && exc != 0) except_rethrow( exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };};
426 |
427 | if (error) { WSLUA_ERROR(TreeItem_add_packet_field,error){ luaL_error(L, "%s%s", "TreeItem_add_packet_field" ": ", error ); }; }
428 |
429 | if (err != 0) {
430 | lua_pushnil(L);
431 | lua_pushnil(L);
432 | }
433 |
434 | while(nargs) {
435 | const char* s;
436 | s = lua_tostring(L,1)lua_tolstring(L, (1), ((void*)0));
437 | if (s) proto_item_append_text(item, " %s", s);
438 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
439 | nargs--;
440 | }
441 |
442 | push_TreeItem(L, proto_item_add_subtree(item,ett > 0 ? ett : wslua_ett), item);
443 |
444 | /* move the tree object before the field value */
445 | lua_insert(L, 1)lua_rotate(L, (1), 1);
446 |
447 | WSLUA_RETURN(3)return (3); /* The new child <<lua_class_TreeItem,`TreeItem`>>, the field's extracted value or nil, and offset or nil. */
448 | }
449 |
450 | /* The following is used by TreeItem_add() and TreeItem_le() and can THROW.
451 | * It should be called inside a TRY (e.g. WRAP_NON_LUA_EXCEPTIONS) block and
452 | * THROW_LUA_ERROR should be used insteadof lua[L]_error.
453 | */
454 | static int TreeItem_add_item_any(lua_State *L, bool_Bool little_endian) {
455 | TvbRange tvbr;
456 | Proto proto;
457 | ProtoField field;
458 | int hfid = -1;
459 | int ett = -1;
460 | ftenum_t type = FT_NONE;
461 | TreeItem tree_item = shiftTreeItem(L,1);
462 | proto_item* item = NULL((void*)0);
463 |
464 | if (!tree_item) {
465 | THROW_LUA_ERROR("not a TreeItem!")except_throwf(1, (6), "not a TreeItem!");
466 | }
467 | if (tree_item->expired) {
468 | THROW_LUA_ERROR("expired TreeItem")except_throwf(1, (6), "expired TreeItem");
469 | return 0;
470 | }
471 |
472 | if (! ( field = shiftProtoField(L,1) ) ) {
473 | if (( proto = shiftProto(L,1) )) {
474 | hfid = proto->hfid;
475 | type = FT_PROTOCOL;
476 | ett = proto->ett;
477 | } else if (lua_isnil(L, 1)(lua_type(L, (1)) == 0)) {
478 | THROW_LUA_ERROR("first argument to TreeItem:add is nil!")except_throwf(1, (6), "first argument to TreeItem:add is nil!" );
479 | }
480 | } else {
481 | hfid = field->hfid;
482 | type = field->type;
483 | ett = field->ett;
484 | }
485 |
486 | tvbr = shiftTvbRange(L,1);
487 |
488 | if (!tvbr) {
489 | tvbr = wmem_new(lua_pinfo->pool, struct _wslua_tvbrange)((struct _wslua_tvbrange*)wmem_alloc((lua_pinfo->pool), sizeof (struct _wslua_tvbrange)));
490 | tvbr->tvb = wmem_new(lua_pinfo->pool, struct _wslua_tvb)((struct _wslua_tvb*)wmem_alloc((lua_pinfo->pool), sizeof( struct _wslua_tvb)));
491 | tvbr->tvb->ws_tvb = lua_tvb;
492 | tvbr->offset = 0;
493 | tvbr->len = 0;
494 | }
495 |
496 | if (hfid > 0 ) {
497 | /* hfid is > 0 when the first arg was a ProtoField or Proto */
498 |
499 | if (type == FT_STRINGZ) {
500 | if (tvb_find_uint8 (tvbr->tvb->ws_tvb, tvbr->offset, -1, 0) == -1) {
501 | THROW_LUA_ERROR("out of bounds")except_throwf(1, (6), "out of bounds");
502 | return 0;
503 | }
504 | tvbr->len = tvb_strsize (tvbr->tvb->ws_tvb, tvbr->offset);
505 | }
506 |
507 | if (lua_gettop(L)) {
508 | /* if we got here, the (L,1) index is the value to add, instead of decoding from the Tvb */
509 |
510 | /* It's invalid for it to be nil (which has been documented for
511 | * a long time). Make sure we throw our error instead of an
512 | * internal Lua error (due to nested setjmp/longjmp).
513 | */
514 | if (lua_isnil(L, 1)(lua_type(L, (1)) == 0)) {
515 | THROW_LUA_ERROR("TreeItem:add value argument is nil!")except_throwf(1, (6), "TreeItem:add value argument is nil!");
516 | }
517 |
518 | switch(type) {
519 | case FT_PROTOCOL:
520 | item = proto_tree_add_item(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,ENC_NA0x00000000);
521 | lua_pushinteger(L,0);
522 | lua_insert(L,1)lua_rotate(L, (1), 1);
523 | break;
524 | case FT_BOOLEAN:
525 | {
526 | uint64_t val;
527 | switch(lua_type(L, 1)) {
528 |
529 | case LUA_TUSERDATA7:
530 | val = checkUInt64(L, 1);
531 | break;
532 |
533 | default:
534 | /* this needs to use checkinteger so that it can accept a Lua boolean and coerce it to an int */
535 | val = (uint64_t) (wslua_tointeger(L,1));
536 | }
537 | item = proto_tree_add_boolean(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,val);
538 | }
539 | break;
540 | case FT_CHAR:
541 | case FT_UINT8:
542 | case FT_UINT16:
543 | case FT_UINT24:
544 | case FT_UINT32:
545 | case FT_FRAMENUM:
546 | item = proto_tree_add_uint(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,wslua_checkuint32(L,1)(uint32_t) ( luaL_checkinteger(L,1) ));
547 | break;
548 | case FT_INT8:
549 | case FT_INT16:
550 | case FT_INT24:
551 | case FT_INT32:
552 | item = proto_tree_add_int(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,wslua_checkint32(L,1)(int32_t) ( luaL_checkinteger(L,1) ));
553 | break;
554 | case FT_FLOAT:
555 | item = proto_tree_add_float(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,(float)luaL_checknumber(L,1));
556 | break;
557 | case FT_DOUBLE:
558 | item = proto_tree_add_double(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,(double)luaL_checknumber(L,1));
559 | break;
560 | case FT_ABSOLUTE_TIME:
561 | case FT_RELATIVE_TIME:
562 | item = proto_tree_add_time(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,checkNSTime(L,1));
563 | break;
564 | case FT_STRING:
565 | case FT_STRINGZ:
566 | item = proto_tree_add_string(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,luaL_checkstring(L,1)(luaL_checklstring(L, (1), ((void*)0))));
567 | break;
568 | case FT_BYTES:
569 | item = proto_tree_add_bytes(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len, (const uint8_t*) luaL_checkstring(L,1)(luaL_checklstring(L, (1), ((void*)0))));
570 | break;
571 | case FT_UINT64:
572 | item = proto_tree_add_uint64(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,checkUInt64(L,1));
573 | break;
574 | case FT_INT64:
575 | item = proto_tree_add_int64(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,checkInt64(L,1));
576 | break;
577 | case FT_IPv4:
578 | {
579 | Address addr = checkAddress(L,1);
580 | uint32_t addr_value;
581 |
582 | if (addr->type != AT_IPv4) {
583 | THROW_LUA_ERROR("Expected IPv4 address for FT_IPv4 field")except_throwf(1, (6), "Expected IPv4 address for FT_IPv4 field" );
584 | return 0;
585 | }
586 |
587 | /*
588 | * The address is not guaranteed to be aligned on a
589 | * 32-bit boundary, so we can't safely dereference
590 | * the pointer as if it were so aligned.
591 | */
592 | memcpy(&addr_value, addr->data, sizeof addr_value);
593 | item = proto_tree_add_ipv4(tree_item->tree,hfid,tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,addr_value);
594 | }
595 | break;
596 | case FT_IPv6:
597 | {
598 | Address addr = checkAddress(L,1);
599 | if (addr->type != AT_IPv6) {
600 | THROW_LUA_ERROR("Expected IPv6 address for FT_IPv6 field")except_throwf(1, (6), "Expected IPv6 address for FT_IPv6 field" );
601 | return 0;
602 | }
603 |
604 | item = proto_tree_add_ipv6(tree_item->tree, hfid, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, (const ws_in6_addr *)addr->data);
605 | }
606 | break;
607 | case FT_ETHER:
608 | {
609 | Address addr = checkAddress(L,1);
610 | if (addr->type != AT_ETHER) {
611 | THROW_LUA_ERROR("Expected MAC address for FT_ETHER field")except_throwf(1, (6), "Expected MAC address for FT_ETHER field" );
612 | return 0;
613 | }
614 |
615 | item = proto_tree_add_ether(tree_item->tree, hfid, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, (const uint8_t *)addr->data);
616 | }
617 | break;
618 | case FT_UINT_BYTES:
619 | case FT_IPXNET:
620 | case FT_GUID:
621 | case FT_OID:
622 | case FT_REL_OID:
623 | case FT_SYSTEM_ID:
624 | case FT_VINES:
625 | case FT_FCWWN:
626 | default:
627 | THROW_LUA_ERROR("%s not yet supported", ftype_name(type))except_throwf(1, (6), "%s not yet supported", ftype_name(type ));
628 | return 0;
629 | }
630 |
631 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
632 |
633 | } else {
634 | if (type == FT_FRAMENUM) {
635 | THROW_LUA_ERROR("ProtoField FRAMENUM cannot fetch value from Tvb")except_throwf(1, (6), "ProtoField FRAMENUM cannot fetch value from Tvb" );
636 | return 0;
637 | }
638 | /* the Lua stack is empty - no value was given - so decode the value from the tvb */
639 | item = proto_tree_add_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, little_endian ? ENC_LITTLE_ENDIAN0x80000000 : ENC_BIG_ENDIAN0x00000000);
640 | }
641 |
642 | if ( lua_gettop(L) ) {
643 | /* if there was a value, it was removed earlier, so what's left is the display string to set */
644 | const char* s = lua_tostring(L,1)lua_tolstring(L, (1), ((void*)0));
645 | if (s) proto_item_set_text(item,"%s",s);
646 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
647 | }
648 |
649 | } else {
650 | /* no ProtoField or Proto was given - we're adding a text-only field,
651 | * any remaining parameters are parts of the text label. */
652 | if (lua_gettop(L)) {
653 | const char* s = lua_tostring(L,1)lua_tolstring(L, (1), ((void*)0));
654 | const int hf = get_hf_wslua_text();
655 | if (hf > -1) {
656 | /* use proto_tree_add_none_format() instead? */
657 | item = proto_tree_add_item(tree_item->tree, hf, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, ENC_NA0x00000000);
658 | proto_item_set_text(item, "%s", s);
659 | } else {
660 | THROW_LUA_ERROR("Internal error: hf_wslua_text not registered")except_throwf(1, (6), "Internal error: hf_wslua_text not registered" );
661 | }
662 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
663 | } else {
664 | THROW_LUA_ERROR("Tree item ProtoField/Protocol handle is invalid (ProtoField/Proto not registered?)")except_throwf(1, (6), "Tree item ProtoField/Protocol handle is invalid (ProtoField/Proto not registered?)" );
665 | }
666 | }
667 |
668 | while(lua_gettop(L)) {
669 | /* keep appending more text */
670 | const char* s = lua_tostring(L,1)lua_tolstring(L, (1), ((void*)0));
671 | if (s) proto_item_append_text(item, " %s", s);
672 | lua_remove(L,1)(lua_rotate(L, (1), -1), lua_settop(L, -(1)-1));
673 | }
674 |
675 | push_TreeItem(L, proto_item_add_subtree(item,ett > 0 ? ett : wslua_ett), item);
676 |
677 | return 1;
678 | }
679 |
680 |
681 | WSLUA_METHODstatic int TreeItem_add(lua_State *L) {
682 | /*
683 | Adds a child item to this tree item, returning the new child <<lua_class_TreeItem,`TreeItem`>>.
684 |
685 | If the <<lua_class_ProtoField,`ProtoField`>> represents a numeric value (int, uint or float), then it's treated as a Big Endian (network order) value.
686 |
687 | This function has a complicated form: 'treeitem:add([protofield,] [tvbrange,] [[value], label]])', such that if the first
688 | argument is a <<lua_class_ProtoField,`ProtoField`>> or a <<lua_class_Proto,`Proto`>>, the second argument is a <<lua_class_TvbRange,`TvbRange`>>, and a third argument is given, it's a value;
689 | but if the second argument is a non-<<lua_class_TvbRange,`TvbRange`>>, then it's the value (as opposed to filling that argument with 'nil',
690 | which is invalid for this function). If the first argument is a non-<<lua_class_ProtoField,`ProtoField`>> and a non-<<lua_class_Proto,`Proto`>> then this argument can
691 | be either a <<lua_class_TvbRange,`TvbRange`>> or a label, and the value is not in use.
692 |
693 | [discrete]
694 | ====== Example
695 |
696 | [source,lua]
697 | ----
698 | local proto_foo = Proto("foo", "Foo Protocol")
699 | proto_foo.fields.bytes = ProtoField.bytes("foo.bytes", "Byte array")
700 | proto_foo.fields.u16 = ProtoField.uint16("foo.u16", "Unsigned short", base.HEX)
701 |
702 | function proto_foo.dissector(buf, pinfo, tree)
703 | -- ignore packets less than 4 bytes long
704 | if buf:len() < 4 then return end
705 |
706 | -- ##############################################
707 | -- # Assume buf(0,4) == {0x00, 0x01, 0x00, 0x02}
708 | -- ##############################################
709 |
710 | local t = tree:add( proto_foo, buf() )
711 |
712 | -- Adds a byte array that shows as: "Byte array: 00010002"
713 | t:add( proto_foo.fields.bytes, buf(0,4) )
714 |
715 | -- Adds a byte array that shows as "Byte array: 313233"
716 | -- (the ASCII char code of each character in "123")
717 | t:add( proto_foo.fields.bytes, buf(0,4), "123" )
718 |
719 | -- Adds a tree item that shows as: "Unsigned short: 0x0001"
720 | t:add( proto_foo.fields.u16, buf(0,2) )
721 |
722 | -- Adds a tree item that shows as: "Unsigned short: 0x0064"
723 | t:add( proto_foo.fields.u16, buf(0,2), 100 )
724 |
725 | -- Adds a tree item that shows as: "Unsigned short: 0x0064 ( big endian )"
726 | t:add( proto_foo.fields.u16, buf(1,2), 100, nil, "(", nil, "big", 999, nil, "endian", nil, ")" )
727 |
728 | -- LITTLE ENDIAN: Adds a tree item that shows as: "Unsigned short: 0x0100"
729 | t:add_le( proto_foo.fields.u16, buf(0,2) )
730 |
731 | -- LITTLE ENDIAN: Adds a tree item that shows as: "Unsigned short: 0x6400"
732 | t:add_le( proto_foo.fields.u16, buf(0,2), 100 )
733 |
734 | -- LITTLE ENDIAN: Adds a tree item that shows as: "Unsigned short: 0x6400 ( little endian )"
735 | t:add_le( proto_foo.fields.u16, buf(1,2), 100, nil, "(", nil, "little", 999, nil, "endian", nil, ")" )
736 | end
737 |
738 | udp_table = DissectorTable.get("udp.port")
739 | udp_table:add(7777, proto_foo)
740 | ----
741 | */
742 | #define WSLUA_OPTARG_TreeItem_add_PROTOFIELD2 2 /* The <<lua_class_ProtoField,`ProtoField`>> field or <<lua_class_Proto,`Proto`>> protocol object to add to the tree. */
743 | #define WSLUA_OPTARG_TreeItem_add_TVBRANGE3 3 /* The <<lua_class_TvbRange,`TvbRange`>> of bytes in the packet this tree item covers/represents. */
744 | #define WSLUA_OPTARG_TreeItem_add_VALUE4 4 /* The field's value, instead of the ProtoField/Proto one. */
745 | #define WSLUA_OPTARG_TreeItem_add_LABEL5 5 /* One or more strings to use for the tree item label, instead of the ProtoField/Proto one. */
746 |
747 | volatile int ret;
748 | WRAP_NON_LUA_EXCEPTIONS({ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,0) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
749 | ret = TreeItem_add_item_any(L,false);{ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,0) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
750 | ){ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,0) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
751 | WSLUA_RETURN(ret)return (ret); /* The new child TreeItem. */
752 | }
753 |
754 | WSLUA_METHODstatic int TreeItem_add_le(lua_State *L) {
755 | /*
756 | Adds a child item to this tree item, returning the new child <<lua_class_TreeItem,`TreeItem`>>.
757 |
758 | If the <<lua_class_ProtoField,`ProtoField`>> represents a numeric value (int, uint or float), then it's treated as a Little Endian value.
759 |
760 | This function has a complicated form: 'treeitem:add_le([protofield,] [tvbrange,] [[value], label]])', such that if the first
761 | argument is a <<lua_class_ProtoField,`ProtoField`>> or a <<lua_class_Proto,`Proto`>>, the second argument is a <<lua_class_TvbRange,`TvbRange`>>, and a third argument is given, it's a value;
762 | but if the second argument is a non-<<lua_class_TvbRange,`TvbRange`>>, then it's the value (as opposed to filling that argument with 'nil',
763 | which is invalid for this function). If the first argument is a non-<<lua_class_ProtoField,`ProtoField`>> and a non-<<lua_class_Proto,`Proto`>> then this argument can
764 | be either a <<lua_class_TvbRange,`TvbRange`>> or a label, and the value is not in use.
765 | */
766 | #define WSLUA_OPTARG_TreeItem_add_le_PROTOFIELD2 2 /* The ProtoField field or Proto protocol object to add to the tree. */
767 | #define WSLUA_OPTARG_TreeItem_add_le_TVBRANGE3 3 /* The TvbRange of bytes in the packet this tree item covers/represents. */
768 | #define WSLUA_OPTARG_TreeItem_add_le_VALUE4 4 /* The field's value, instead of the ProtoField/Proto one. */
769 | #define WSLUA_OPTARG_TreeItem_add_le_LABEL5 5 /* One or more strings to use for the tree item label, instead of the ProtoField/Proto one. */
770 | volatile int ret;
1 | 'ret' declared without an initial value | →
771 | WRAP_NON_LUA_EXCEPTIONS({ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,1) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
2 | ← | Assuming the condition is true | →
3 | ← | Taking true branch | →
4 | ← | Taking false branch | →
5 | ← | Taking false branch | →
6 | ← | Assuming field 'except_code' is equal to 1 | →
7 | ← | Taking true branch | →
8 | ← | Taking false branch | →
772 | ret = TreeItem_add_item_any(L,true);{ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,1) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
773 | ){ volatile _Bool has_error = 0; { 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) { ret = TreeItem_add_item_any(L,1) ; } if (except_state == 0 && exc != 0 && (exc ->except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
774 | WSLUA_RETURN(ret)return (ret); /* The new child TreeItem. */
9 | ← | Undefined or garbage value returned to caller
775 | }
776 |
777 | /* WSLUA_ATTRIBUTE TreeItem_text RW Set/get the <<lua_class_TreeItem,`TreeItem`>>'s display string (string).
778 |
779 | For the getter, if the TreeItem has no display string, then nil is returned.
780 | */
781 | static int TreeItem_get_text(lua_State* L) {
782 | TreeItem ti = checkTreeItem(L,1);
783 | char label_str[ITEM_LABEL_LENGTH240+1];
784 | char *label_ptr;
785 |
786 | if (ti->item && PITEM_FINFO(ti->item)((ti->item)->finfo)) {
787 | field_info *fi = PITEM_FINFO(ti->item)((ti->item)->finfo);
788 |
789 | if (!fi->rep) {
790 | label_ptr = label_str;
791 | proto_item_fill_label(fi, label_str, NULL((void*)0));
792 | } else
793 | label_ptr = fi->rep->representation;
794 |
795 | if (label_ptr) {
796 | lua_pushstring(L, label_ptr);
797 | } else {
798 | lua_pushnil(L);
799 | }
800 | } else {
801 | lua_pushnil(L);
802 | }
803 |
804 | return 1;
805 | }
806 |
807 | /* the following is used as both a method and attribute */
808 | WSLUA_METHODstatic int TreeItem_set_text(lua_State *L) {
809 | /* Sets the text of the label.
810 |
811 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
812 | */
813 | #define WSLUA_ARG_TreeItem_set_text_TEXT2 2 /* The text to be used. */
814 | TreeItem ti = checkTreeItem(L,1);
815 | const char* s = luaL_checkstring(L,WSLUA_ARG_TreeItem_set_text_TEXT)(luaL_checklstring(L, (2), ((void*)0)));
816 |
817 | proto_item_set_text(ti->item,"%s",s);
818 |
819 | /* copy the TreeItem userdata so we give it back */
820 | lua_pushvalue(L, 1);
821 |
822 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
823 | }
824 |
825 | WSLUA_METHODstatic int TreeItem_append_text(lua_State *L) {
826 | /* Appends text to the label.
827 |
828 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
829 | */
830 | #define WSLUA_ARG_TreeItem_append_text_TEXT2 2 /* The text to be appended. */
831 | TreeItem ti = checkTreeItem(L,1);
832 | const char* s = luaL_checkstring(L,WSLUA_ARG_TreeItem_append_text_TEXT)(luaL_checklstring(L, (2), ((void*)0)));
833 |
834 | proto_item_append_text(ti->item,"%s",s);
835 |
836 | /* copy the TreeItem userdata so we give it back */
837 | lua_pushvalue(L, 1);
838 |
839 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
840 | }
841 |
842 | WSLUA_METHODstatic int TreeItem_prepend_text(lua_State *L) {
843 | /* Prepends text to the label.
844 |
845 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
846 | */
847 | #define WSLUA_ARG_TreeItem_prepend_text_TEXT2 2 /* The text to be prepended. */
848 | TreeItem ti = checkTreeItem(L,1);
849 | const char* s = luaL_checkstring(L,WSLUA_ARG_TreeItem_prepend_text_TEXT)(luaL_checklstring(L, (2), ((void*)0)));
850 |
851 | proto_item_prepend_text(ti->item,"%s",s);
852 |
853 | /* copy the TreeItem userdata so we give it back */
854 | lua_pushvalue(L, 1);
855 |
856 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
857 | }
858 |
859 | WSLUA_METHODstatic int TreeItem_add_expert_info(lua_State *L) {
860 | /* Sets the expert flags of the item and adds expert info to the packet.
861 |
862 | This function does *not* create a truly filterable expert info for a protocol.
863 | Instead you should use `TreeItem.add_proto_expert_info()`.
864 |
865 | Note: This function is provided for backwards compatibility only, and should not
866 | be used in new Lua code. It may be removed in the future. You should only
867 | use `TreeItem.add_proto_expert_info()`.
868 | */
869 | #define WSLUA_OPTARG_TreeItem_add_expert_info_GROUP2 2 /* One of:
870 | `PI_CHECKSUM`,
871 | `PI_SEQUENCE`,
872 | `PI_RESPONSE_CODE`,
873 | `PI_REQUEST_CODE`,
874 | `PI_UNDECODED`,
875 | `PI_REASSEMBLE`,
876 | `PI_MALFORMED`,
877 | `PI_DEBUG`,
878 | `PI_PROTOCOL`,
879 | `PI_SECURITY`,
880 | `PI_COMMENTS_GROUP`,
881 | `PI_DECRYPTION`,
882 | `PI_ASSUMPTION`,
883 | `PI_DEPRECATED`,
884 | `PI_RECEIVE`,
885 | `PI_INTERFACE`,
886 | or `PI_DISSECTOR_BUG`. */
887 | #define WSLUA_OPTARG_TreeItem_add_expert_info_SEVERITY3 3 /* One of:
888 | `PI_COMMENT`,
889 | `PI_CHAT`,
890 | `PI_NOTE`,
891 | `PI_WARN`,
892 | or `PI_ERROR`. */
893 | #define WSLUA_OPTARG_TreeItem_add_expert_info_TEXT4 4 /* The text for the expert info display. */
894 | TreeItem ti = checkTreeItem(L,1);
895 | int group = (int)luaL_optinteger(L,WSLUA_OPTARG_TreeItem_add_expert_info_GROUP2,PI_DEBUG0x08000000);
896 | int severity = (int)luaL_optinteger(L,WSLUA_OPTARG_TreeItem_add_expert_info_SEVERITY3,PI_CHAT0x00200000);
897 | expert_field* ei_info = wslua_get_expert_field(group, severity);
898 | const char* str;
899 |
900 | if (lua_gettop(L) >= WSLUA_OPTARG_TreeItem_add_expert_info_TEXT4) {
901 | str = wslua_checkstring_only(L, WSLUA_OPTARG_TreeItem_add_expert_info_TEXT4);
902 | expert_add_info_format(lua_pinfo, ti->item, ei_info, "%s", str);
903 | } else {
904 | expert_add_info(lua_pinfo, ti->item, ei_info);
905 | }
906 |
907 | /* copy the TreeItem userdata so we give it back */
908 | lua_pushvalue(L, 1);
909 |
910 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
911 | }
912 |
913 | WSLUA_METHODstatic int TreeItem_add_proto_expert_info(lua_State *L) {
914 | /* Sets the expert flags of the tree item and adds expert info to the packet. */
915 | #define WSLUA_ARG_TreeItem_add_proto_expert_info_EXPERT2 2 /* The <<lua_class_ProtoExpert,`ProtoExpert`>> object to add to the tree. */
916 | #define WSLUA_OPTARG_TreeItem_add_proto_expert_info_TEXT3 3 /* Text for the expert info display
917 | (default is to use the registered
918 | text). */
919 | TreeItem ti = checkTreeItem(L,1);
920 | ProtoExpert expert = checkProtoExpert(L,WSLUA_ARG_TreeItem_add_proto_expert_info_EXPERT2);
921 | const char* str;
922 |
923 | if (expert->ids.ei == EI_INIT_EI0 || expert->ids.hf == EI_INIT_HF0) {
924 | luaL_error(L, "ProtoExpert is not registered");
925 | return 0;
926 | }
927 |
928 | if (lua_gettop(L) >= WSLUA_OPTARG_TreeItem_add_proto_expert_info_TEXT3) {
929 | str = wslua_checkstring_only(L, WSLUA_OPTARG_TreeItem_add_proto_expert_info_TEXT3);
930 | expert_add_info_format(lua_pinfo, ti->item, &expert->ids, "%s", str);
931 | } else {
932 | expert_add_info(lua_pinfo, ti->item, &expert->ids);
933 | }
934 |
935 | /* copy the TreeItem userdata so we give it back */
936 | lua_pushvalue(L, 1);
937 |
938 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
939 | }
940 |
941 | WSLUA_METHODstatic int TreeItem_add_tvb_expert_info(lua_State *L) {
942 | /* Sets the expert flags of the tree item and adds expert info to the packet
943 | associated with the <<lua_class_Tvb,`Tvb`>> or <<lua_class_TvbRange,`TvbRange`>> bytes in the packet. */
944 | #define WSLUA_ARG_TreeItem_add_tvb_expert_info_EXPERT2 2 /* The <<lua_class_ProtoExpert,`ProtoExpert`>> object to add to the tree. */
945 | #define WSLUA_ARG_TreeItem_add_tvb_expert_info_TVB3 3 /* The <<lua_class_Tvb,`Tvb`>> or <<lua_class_TvbRange,`TvbRange`>> object bytes to associate
946 | the expert info with. */
947 | #define WSLUA_OPTARG_TreeItem_add_tvb_expert_info_TEXT4 4 /* Text for the expert info display
948 | (default is to use the registered
949 | text). */
950 | TreeItem ti = checkTreeItem(L,1);
951 | ProtoExpert expert = checkProtoExpert(L,WSLUA_ARG_TreeItem_add_proto_expert_info_EXPERT2);
952 | TvbRange tvbr;
953 | const char* str;
954 |
955 | if (expert->ids.ei == EI_INIT_EI0 || expert->ids.hf == EI_INIT_HF0) {
956 | luaL_error(L, "ProtoExpert is not registered");
957 | return 0;
958 | }
959 |
960 | tvbr = shiftTvbRange(L,WSLUA_ARG_TreeItem_add_tvb_expert_info_TVB3);
961 |
962 | if (!tvbr) {
963 | tvbr = wmem_new(lua_pinfo->pool, struct _wslua_tvbrange)((struct _wslua_tvbrange*)wmem_alloc((lua_pinfo->pool), sizeof (struct _wslua_tvbrange)));
964 | tvbr->tvb = shiftTvb(L,WSLUA_ARG_TreeItem_add_tvb_expert_info_TVB3);
965 | if (!tvbr->tvb) {
966 | tvbr->tvb = wmem_new(lua_pinfo->pool, struct _wslua_tvb)((struct _wslua_tvb*)wmem_alloc((lua_pinfo->pool), sizeof( struct _wslua_tvb)));
967 | }
968 | tvbr->tvb->ws_tvb = lua_tvb;
969 | tvbr->offset = 0;
970 | tvbr->len = 0;
971 | }
972 |
973 | if (lua_gettop(L) >= WSLUA_OPTARG_TreeItem_add_proto_expert_info_TEXT3) {
974 | str = wslua_checkstring_only(L, WSLUA_OPTARG_TreeItem_add_proto_expert_info_TEXT3);
975 | proto_tree_add_expert_format(ti->tree, lua_pinfo, &expert->ids,
976 | tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len,
977 | "%s", str);
978 | } else {
979 | proto_tree_add_expert(ti->tree, lua_pinfo, &expert->ids,
980 | tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
981 | }
982 |
983 | /* copy the TreeItem userdata so we give it back */
984 | lua_pushvalue(L, 1);
985 |
986 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
987 | }
988 |
989 |
990 | /* WSLUA_ATTRIBUTE TreeItem_visible RO Get the <<lua_class_TreeItem,`TreeItem`>>'s subtree visibility status (boolean). */
991 | static int TreeItem_get_visible(lua_State* L) {
992 | TreeItem ti = checkTreeItem(L,1);
993 |
994 | if (ti->tree) {
995 | lua_pushboolean(L, PTREE_DATA(ti->tree)((ti->tree)->tree_data)->visible);
996 | }
997 | else {
998 | lua_pushboolean(L, false0);
999 | }
1000 |
1001 | return 1;
1002 | }
1003 |
1004 |
1005 | /* WSLUA_ATTRIBUTE TreeItem_generated RW Set/get the <<lua_class_TreeItem,`TreeItem`>>'s generated state (boolean). */
1006 | static int TreeItem_get_generated(lua_State* L) {
1007 | TreeItem ti = checkTreeItem(L,1);
1008 |
1009 | lua_pushboolean(L, proto_item_is_generated(ti->item));
1010 |
1011 | return 1;
1012 | }
1013 |
1014 | /* the following is used as both a method and attribute. As a method it defaults
1015 | to setting the value, because that's what it used to do before. */
1016 | WSLUA_METHODstatic int TreeItem_set_generated(lua_State *L) {
1017 | /* Marks the <<lua_class_TreeItem,`TreeItem`>> as a generated field (with data inferred but not contained in the packet).
1018 |
1019 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
1020 | */
1021 | #define WSLUA_OPTARG_TreeItem_set_generated_BOOL2 2 /* A Lua boolean, which if `true` sets the <<lua_class_TreeItem,`TreeItem`>>
1022 | generated flag, else clears it (default=true) */
1023 | TreeItem ti = checkTreeItem(L,1);
1024 | bool_Bool set = wslua_optbool(L, WSLUA_OPTARG_TreeItem_set_generated_BOOL2, true1);
1025 |
1026 | if (set) {
1027 | proto_item_set_generated(ti->item);
1028 | } else {
1029 | if (ti->item)
1030 | FI_RESET_FLAG(PITEM_FINFO(ti->item), FI_GENERATED)do { if (((ti->item)->finfo)) (((ti->item)->finfo ))->flags = (((ti->item)->finfo))->flags & ~( 0x00000002); } while(0);
1031 | }
1032 |
1033 | /* copy the TreeItem userdata so we give it back */
1034 | lua_pushvalue(L, 1);
1035 |
1036 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
1037 | }
1038 |
1039 | /* WSLUA_ATTRIBUTE TreeItem_hidden RW Set/get <<lua_class_TreeItem,`TreeItem`>>'s hidden state (boolean). */
1040 | static int TreeItem_get_hidden(lua_State* L) {
1041 | TreeItem ti = checkTreeItem(L,1);
1042 |
1043 | lua_pushboolean(L, proto_item_is_hidden(ti->item));
1044 |
1045 | return 1;
1046 | }
1047 |
1048 | /* the following is used as both a method and attribute. As a method it defaults
1049 | to setting the value, because that's what it used to do before. */
1050 | WSLUA_METHODstatic int TreeItem_set_hidden(lua_State *L) {
1051 | /*
1052 | Marks the <<lua_class_TreeItem,`TreeItem`>> as a hidden field (neither displayed nor used in filters).
1053 | Deprecated
1054 |
1055 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
1056 | */
1057 | #define WSLUA_OPTARG_TreeItem_set_hidden_BOOL2 2 /* A Lua boolean, which if `true` sets the <<lua_class_TreeItem,`TreeItem`>>
1058 | hidden flag, else clears it. Default is `true`. */
1059 | TreeItem ti = checkTreeItem(L,1);
1060 | bool_Bool set = wslua_optbool(L, WSLUA_OPTARG_TreeItem_set_hidden_BOOL2, true1);
1061 |
1062 | if (set) {
1063 | proto_item_set_hidden(ti->item);
1064 | } else {
1065 | proto_item_set_visible(ti->item);
1066 | }
1067 |
1068 | /* copy the TreeItem userdata so we give it back */
1069 | lua_pushvalue(L, 1);
1070 |
1071 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
1072 | }
1073 |
1074 | /* WSLUA_ATTRIBUTE TreeItem_len RW Set/get <<lua_class_TreeItem,`TreeItem`>>'s length inside tvb, after it has already been created. */
1075 | static int TreeItem_get_len(lua_State* L) {
1076 | TreeItem ti = checkTreeItem(L,1);
1077 | int len = 0;
1078 |
1079 | /* XXX - this is *NOT* guaranteed to return a correct value! */
1080 | len = proto_item_get_len(ti->item);
1081 |
1082 | lua_pushinteger(L, len > 0 ? len : 0);
1083 |
1084 | return 1;
1085 | }
1086 |
1087 | WSLUA_METHODstatic int TreeItem_set_len(lua_State *L) {
1088 | /* Set <<lua_class_TreeItem,`TreeItem`>>'s length inside tvb, after it has already been created.
1089 |
1090 | This used to return nothing, but as of 1.11.3 it returns the same tree item to allow chained calls.
1091 | */
1092 | #define WSLUA_ARG_TreeItem_set_len_LEN2 2 /* The length to be used. */
1093 | TreeItem ti = checkTreeItem(L,1);
1094 | int len = (int)luaL_checkinteger(L,WSLUA_ARG_TreeItem_set_len_LEN2);
1095 |
1096 | if (len < 0) {
1097 | luaL_argerror(L,WSLUA_ARG_TreeItem_set_len_LEN2,"must be a positive value");
1098 | return 0;
1099 | }
1100 |
1101 | proto_item_set_len(ti->item, len);
1102 |
1103 | /* copy the TreeItem userdata so we give it back */
1104 | lua_pushvalue(L, 1);
1105 |
1106 | WSLUA_RETURN(1)return (1); /* The same TreeItem. */
1107 | }
1108 |
1109 | WSLUA_METHODstatic int TreeItem_referenced(lua_State *L) {
1110 | /* Checks if a <<lua_class_ProtoField,`ProtoField`>> or <<lua_class_Dissector,`Dissector`>> is referenced by a filter/tap/UI.
1111 |
1112 | If this function returns `false`, it means that the field (or dissector) does not need to be dissected
1113 | and can be safely skipped. By skipping a field rather than dissecting it, the dissector will
1114 | usually run faster since Wireshark will not do extra dissection work when it doesn't need the field.
1115 |
1116 | You can use this in conjunction with the TreeItem.visible attribute. This function will always return
1117 | true when the TreeItem is visible. When it is not visible and the field is not referenced, you can
1118 | speed up the dissection by not dissecting the field as it is not needed for display or filtering.
1119 |
1120 | This function takes one parameter that can be a <<lua_class_ProtoField,`ProtoField`>> or <<lua_class_Dissector,`Dissector`>>.
1121 | The <<lua_class_Dissector,`Dissector`>> form is useful when you need to decide whether to call a sub-dissector.
1122 | */
1123 | #define WSLUA_ARG_TreeItem_referenced_PROTOFIELD2 2 /* The <<lua_class_ProtoField,`ProtoField`>> or <<lua_class_Dissector,`Dissector`>> to check if referenced. */
1124 | TreeItem ti = checkTreeItem(L, 1);
1125 | if (!ti) return 0;
1126 | ProtoField f = shiftProtoField(L, WSLUA_ARG_TreeItem_referenced_PROTOFIELD2);
1127 | if (f) {
1128 | lua_pushboolean(L, proto_field_is_referenced(ti->tree, f->hfid));
1129 | }
1130 | else {
1131 | Dissector d = checkDissector(L, WSLUA_ARG_TreeItem_referenced_PROTOFIELD2);
1132 | if (!d) return 0;
1133 | lua_pushboolean(L, proto_field_is_referenced(ti->tree, dissector_handle_get_protocol_index(d)));
1134 | }
1135 | WSLUA_RETURN(1)return (1); /* A boolean indicating if the ProtoField/Dissector is referenced */
1136 | }
1137 |
1138 | WSLUA_METAMETHODstatic int TreeItem__tostring(lua_State* L) {
1139 | /* Returns string debug information about the <<lua_class_TreeItem,`TreeItem`>>. */
1140 | TreeItem ti = toTreeItem(L,1);
1141 |
1142 | if (ti) {
1143 | lua_pushfstring(L,
1144 | "TreeItem: expired=%s, has item=%s, has subtree=%s, they are %sthe same",
1145 | ti->expired ? "true" : "false",
1146 | ti->item ? "true" : "false",
1147 | ti->tree ? "true" : "false",
1148 | (ti->tree == ti->item) ? "" : "not ");
1149 | }
1150 | else {
1151 | lua_pushstring(L, "No TreeItem object!");
1152 | }
1153 |
1154 | return 1;
1155 | }
1156 |
1157 | /* Gets registered as metamethod automatically by WSLUA_REGISTER_CLASS/META */
1158 | static int TreeItem__gc(lua_State* L) {
1159 | TreeItem ti = toTreeItem(L,1);
1160 | if (!ti) return 0;
1161 | if (!ti->expired)
1162 | ti->expired = true1;
1163 | else
1164 | g_free(ti);
1165 | return 0;
1166 | }
1167 |
1168 | WSLUA_ATTRIBUTESstatic const wslua_attribute_table TreeItem_attributes[] = {
1169 | WSLUA_ATTRIBUTE_RWREG(TreeItem,generated){ "generated", TreeItem_get_generated, TreeItem_set_generated },
1170 | WSLUA_ATTRIBUTE_RWREG(TreeItem,hidden){ "hidden", TreeItem_get_hidden, TreeItem_set_hidden },
1171 | WSLUA_ATTRIBUTE_RWREG(TreeItem,len){ "len", TreeItem_get_len, TreeItem_set_len },
1172 | WSLUA_ATTRIBUTE_RWREG(TreeItem,text){ "text", TreeItem_get_text, TreeItem_set_text },
1173 | WSLUA_ATTRIBUTE_ROREG(TreeItem,visible){ "visible", TreeItem_get_visible, ((void*)0) },
1174 | { NULL((void*)0), NULL((void*)0), NULL((void*)0) }
1175 | };
1176 |
1177 | WSLUA_METHODSstatic const luaL_Reg TreeItem_methods[] = {
1178 | WSLUA_CLASS_FNREG(TreeItem,add_packet_field){ "add_packet_field", TreeItem_add_packet_field },
1179 | WSLUA_CLASS_FNREG(TreeItem,add){ "add", TreeItem_add },
1180 | WSLUA_CLASS_FNREG(TreeItem,add_le){ "add_le", TreeItem_add_le },
1181 | WSLUA_CLASS_FNREG(TreeItem,set_text){ "set_text", TreeItem_set_text },
1182 | WSLUA_CLASS_FNREG(TreeItem,append_text){ "append_text", TreeItem_append_text },
1183 | WSLUA_CLASS_FNREG(TreeItem,prepend_text){ "prepend_text", TreeItem_prepend_text },
1184 | WSLUA_CLASS_FNREG(TreeItem,add_expert_info){ "add_expert_info", TreeItem_add_expert_info },
1185 | WSLUA_CLASS_FNREG(TreeItem,add_proto_expert_info){ "add_proto_expert_info", TreeItem_add_proto_expert_info },
1186 | WSLUA_CLASS_FNREG(TreeItem,add_tvb_expert_info){ "add_tvb_expert_info", TreeItem_add_tvb_expert_info },
1187 | WSLUA_CLASS_FNREG(TreeItem,set_generated){ "set_generated", TreeItem_set_generated },
1188 | WSLUA_CLASS_FNREG(TreeItem,set_hidden){ "set_hidden", TreeItem_set_hidden },
1189 | WSLUA_CLASS_FNREG(TreeItem,set_len){ "set_len", TreeItem_set_len },
1190 | WSLUA_CLASS_FNREG(TreeItem,referenced){ "referenced", TreeItem_referenced },
1191 | { NULL((void*)0), NULL((void*)0) }
1192 | };
1193 |
1194 | WSLUA_METAstatic const luaL_Reg TreeItem_meta[] = {
1195 | WSLUA_CLASS_MTREG(TreeItem,tostring){ "__" "tostring", TreeItem__tostring },
1196 | { NULL((void*)0), NULL((void*)0) }
1197 | };
1198 |
1199 | int TreeItem_register(lua_State *L) {
1200 | int* etts[] = { &wslua_ett };
1201 | wslua_ett = -1; /* Reset to support reload Lua plugins */
1202 | WSLUA_REGISTER_CLASS_WITH_ATTRS(TreeItem){ const wslua_class TreeItem_class = { .name = "TreeItem", .class_methods = TreeItem_methods, .class_meta = TreeItem_meta, .instance_methods = TreeItem_methods, .instance_meta = TreeItem_meta, .attrs = TreeItem_attributes }; wslua_register_class(L, &TreeItem_class ); (lua_getfield(L, (-1000000 - 1000), ("TreeItem"))); lua_pushcclosure (L, (TreeItem__gc), 0); lua_setfield(L, -2, "__gc"); lua_settop (L, -(1)-1); };
1203 | if (outstanding_TreeItem != NULL((void*)0)) {
1204 | g_ptr_array_unref(outstanding_TreeItem);
1205 | }
1206 | outstanding_TreeItem = g_ptr_array_new();
1207 | proto_register_subtree_array(etts,1);
1208 | return 0;
1209 | }
1210 |
1211 | /*
1212 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
1213 | *
1214 | * Local variables:
1215 | * c-basic-offset: 4
1216 | * tab-width: 8
1217 | * indent-tabs-mode: nil
1218 | * End:
1219 | *
1220 | * vi: set shiftwidth=4 tabstop=8 expandtab:
1221 | * :indentSize=4:tabSize=8:noTabs=true:
1222 | */