Line data Source code
1 : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2 :
3 : /***
4 : This file is part of systemd.
5 :
6 : Copyright 2013 Lennart Poettering
7 :
8 : systemd is free software; you can redistribute it and/or modify it
9 : under the terms of the GNU Lesser General Public License as published by
10 : the Free Software Foundation; either version 2.1 of the License, or
11 : (at your option) any later version.
12 :
13 : systemd is distributed in the hope that it will be useful, but
14 : WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : Lesser General Public License for more details.
17 :
18 : You should have received a copy of the GNU Lesser General Public License
19 : along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 : ***/
21 :
22 : #include "util.h"
23 : #include "capability.h"
24 : #include "strv.h"
25 : #include "macro.h"
26 : #include "cap-list.h"
27 : #include "formats-util.h"
28 : #include "terminal-util.h"
29 :
30 : #include "bus-message.h"
31 : #include "bus-internal.h"
32 : #include "bus-type.h"
33 : #include "bus-dump.h"
34 :
35 939 : static char *indent(unsigned level, unsigned flags) {
36 : char *p;
37 939 : unsigned n, i = 0;
38 :
39 939 : n = 0;
40 :
41 939 : if (flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY && level > 0)
42 0 : level -= 1;
43 :
44 939 : if (flags & BUS_MESSAGE_DUMP_WITH_HEADER)
45 693 : n += 2;
46 :
47 939 : p = new(char, n + level*8 + 1);
48 939 : if (!p)
49 0 : return NULL;
50 :
51 939 : if (flags & BUS_MESSAGE_DUMP_WITH_HEADER) {
52 693 : p[i++] = ' ';
53 693 : p[i++] = ' ';
54 : }
55 :
56 939 : memset(p + i, ' ', level*8);
57 939 : p[i + level*8] = 0;
58 :
59 939 : return p;
60 : }
61 :
62 20 : int bus_message_dump(sd_bus_message *m, FILE *f, unsigned flags) {
63 20 : unsigned level = 1;
64 : int r;
65 :
66 20 : assert(m);
67 :
68 20 : if (!f)
69 3 : f = stdout;
70 :
71 20 : if (flags & BUS_MESSAGE_DUMP_WITH_HEADER) {
72 119 : fprintf(f,
73 : "%s%s%s Type=%s%s%s Endian=%c Flags=%u Version=%u Priority=%"PRIi64,
74 17 : m->header->type == SD_BUS_MESSAGE_METHOD_ERROR ? ansi_highlight_red() :
75 32 : m->header->type == SD_BUS_MESSAGE_METHOD_RETURN ? ansi_highlight_green() :
76 15 : m->header->type != SD_BUS_MESSAGE_SIGNAL ? ansi_highlight() : "", draw_special_char(DRAW_TRIANGULAR_BULLET), ansi_highlight_off(),
77 17 : ansi_highlight(), bus_message_type_to_string(m->header->type), ansi_highlight_off(),
78 17 : m->header->endian,
79 17 : m->header->flags,
80 17 : m->header->version,
81 : m->priority);
82 :
83 : /* Display synthetic message serial number in a more readable
84 : * format than (uint32_t) -1 */
85 17 : if (BUS_MESSAGE_COOKIE(m) == 0xFFFFFFFFULL)
86 0 : fprintf(f, " Cookie=-1");
87 : else
88 17 : fprintf(f, " Cookie=%" PRIu64, BUS_MESSAGE_COOKIE(m));
89 :
90 17 : if (m->reply_cookie != 0)
91 2 : fprintf(f, " ReplyCookie=%" PRIu64, m->reply_cookie);
92 :
93 17 : fputs("\n", f);
94 :
95 17 : if (m->sender)
96 3 : fprintf(f, " Sender=%s%s%s", ansi_highlight(), m->sender, ansi_highlight_off());
97 17 : if (m->destination)
98 8 : fprintf(f, " Destination=%s%s%s", ansi_highlight(), m->destination, ansi_highlight_off());
99 17 : if (m->path)
100 15 : fprintf(f, " Path=%s%s%s", ansi_highlight(), m->path, ansi_highlight_off());
101 17 : if (m->interface)
102 15 : fprintf(f, " Interface=%s%s%s", ansi_highlight(), m->interface, ansi_highlight_off());
103 17 : if (m->member)
104 15 : fprintf(f, " Member=%s%s%s", ansi_highlight(), m->member, ansi_highlight_off());
105 :
106 17 : if (m->sender || m->destination || m->path || m->interface || m->member)
107 15 : fputs("\n", f);
108 :
109 17 : if (sd_bus_error_is_set(&m->error))
110 0 : fprintf(f,
111 : " ErrorName=%s%s%s"
112 : " ErrorMessage=%s\"%s\"%s\n",
113 : ansi_highlight_red(), strna(m->error.name), ansi_highlight_off(),
114 : ansi_highlight_red(), strna(m->error.message), ansi_highlight_off());
115 :
116 17 : if (m->monotonic != 0)
117 2 : fprintf(f, " Monotonic="USEC_FMT, m->monotonic);
118 17 : if (m->realtime != 0)
119 2 : fprintf(f, " Realtime="USEC_FMT, m->realtime);
120 17 : if (m->seqnum != 0)
121 2 : fprintf(f, " SequenceNumber=%"PRIu64, m->seqnum);
122 :
123 17 : if (m->monotonic != 0 || m->realtime != 0 || m->seqnum != 0)
124 2 : fputs("\n", f);
125 :
126 17 : bus_creds_dump(&m->creds, f, true);
127 : }
128 :
129 20 : r = sd_bus_message_rewind(m, !(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY));
130 20 : if (r < 0)
131 0 : return log_error_errno(r, "Failed to rewind: %m");
132 :
133 20 : if (!(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY)) {
134 40 : _cleanup_free_ char *prefix = NULL;
135 :
136 20 : prefix = indent(0, flags);
137 20 : if (!prefix)
138 0 : return log_oom();
139 :
140 20 : fprintf(f, "%sMESSAGE \"%s\" {\n", prefix, strempty(m->root_container.signature));
141 : }
142 :
143 : for (;;) {
144 1838 : _cleanup_free_ char *prefix = NULL;
145 919 : const char *contents = NULL;
146 : char type;
147 : union {
148 : uint8_t u8;
149 : uint16_t u16;
150 : int16_t s16;
151 : uint32_t u32;
152 : int32_t s32;
153 : uint64_t u64;
154 : int64_t s64;
155 : double d64;
156 : const char *string;
157 : int i;
158 : } basic;
159 :
160 919 : r = sd_bus_message_peek_type(m, &type, &contents);
161 919 : if (r < 0)
162 0 : return log_error_errno(r, "Failed to peek type: %m");
163 :
164 919 : if (r == 0) {
165 250 : if (level <= 1)
166 20 : break;
167 :
168 230 : r = sd_bus_message_exit_container(m);
169 230 : if (r < 0)
170 0 : return log_error_errno(r, "Failed to exit container: %m");
171 :
172 230 : level--;
173 :
174 230 : prefix = indent(level, flags);
175 230 : if (!prefix)
176 0 : return log_oom();
177 :
178 230 : fprintf(f, "%s};\n", prefix);
179 230 : continue;
180 : }
181 :
182 669 : prefix = indent(level, flags);
183 669 : if (!prefix)
184 0 : return log_oom();
185 :
186 669 : if (bus_type_is_container(type) > 0) {
187 230 : r = sd_bus_message_enter_container(m, type, contents);
188 230 : if (r < 0)
189 0 : return log_error_errno(r, "Failed to enter container: %m");
190 :
191 230 : if (type == SD_BUS_TYPE_ARRAY)
192 73 : fprintf(f, "%sARRAY \"%s\" {\n", prefix, contents);
193 157 : else if (type == SD_BUS_TYPE_VARIANT)
194 48 : fprintf(f, "%sVARIANT \"%s\" {\n", prefix, contents);
195 109 : else if (type == SD_BUS_TYPE_STRUCT)
196 53 : fprintf(f, "%sSTRUCT \"%s\" {\n", prefix, contents);
197 56 : else if (type == SD_BUS_TYPE_DICT_ENTRY)
198 56 : fprintf(f, "%sDICT_ENTRY \"%s\" {\n", prefix, contents);
199 :
200 230 : level ++;
201 :
202 230 : continue;
203 : }
204 :
205 439 : r = sd_bus_message_read_basic(m, type, &basic);
206 439 : if (r < 0)
207 0 : return log_error_errno(r, "Failed to get basic: %m");
208 :
209 439 : assert(r > 0);
210 :
211 439 : switch (type) {
212 :
213 : case SD_BUS_TYPE_BYTE:
214 135 : fprintf(f, "%sBYTE %s%u%s;\n", prefix, ansi_highlight(), basic.u8, ansi_highlight_off());
215 135 : break;
216 :
217 : case SD_BUS_TYPE_BOOLEAN:
218 5 : fprintf(f, "%sBOOLEAN %s%s%s;\n", prefix, ansi_highlight(), true_false(basic.i), ansi_highlight_off());
219 5 : break;
220 :
221 : case SD_BUS_TYPE_INT16:
222 0 : fprintf(f, "%sINT16 %s%i%s;\n", prefix, ansi_highlight(), basic.s16, ansi_highlight_off());
223 0 : break;
224 :
225 : case SD_BUS_TYPE_UINT16:
226 0 : fprintf(f, "%sUINT16 %s%u%s;\n", prefix, ansi_highlight(), basic.u16, ansi_highlight_off());
227 0 : break;
228 :
229 : case SD_BUS_TYPE_INT32:
230 29 : fprintf(f, "%sINT32 %s%i%s;\n", prefix, ansi_highlight(), basic.s32, ansi_highlight_off());
231 29 : break;
232 :
233 : case SD_BUS_TYPE_UINT32:
234 14 : fprintf(f, "%sUINT32 %s%u%s;\n", prefix, ansi_highlight(), basic.u32, ansi_highlight_off());
235 14 : break;
236 :
237 : case SD_BUS_TYPE_INT64:
238 0 : fprintf(f, "%sINT64 %s%"PRIi64"%s;\n", prefix, ansi_highlight(), basic.s64, ansi_highlight_off());
239 0 : break;
240 :
241 : case SD_BUS_TYPE_UINT64:
242 17 : fprintf(f, "%sUINT64 %s%"PRIu64"%s;\n", prefix, ansi_highlight(), basic.u64, ansi_highlight_off());
243 17 : break;
244 :
245 : case SD_BUS_TYPE_DOUBLE:
246 5 : fprintf(f, "%sDOUBLE %s%g%s;\n", prefix, ansi_highlight(), basic.d64, ansi_highlight_off());
247 5 : break;
248 :
249 : case SD_BUS_TYPE_STRING:
250 215 : fprintf(f, "%sSTRING \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
251 215 : break;
252 :
253 : case SD_BUS_TYPE_OBJECT_PATH:
254 13 : fprintf(f, "%sOBJECT_PATH \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
255 13 : break;
256 :
257 : case SD_BUS_TYPE_SIGNATURE:
258 5 : fprintf(f, "%sSIGNATURE \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
259 5 : break;
260 :
261 : case SD_BUS_TYPE_UNIX_FD:
262 1 : fprintf(f, "%sUNIX_FD %s%i%s;\n", prefix, ansi_highlight(), basic.i, ansi_highlight_off());
263 1 : break;
264 :
265 : default:
266 0 : assert_not_reached("Unknown basic type.");
267 : }
268 899 : }
269 :
270 20 : if (!(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY)) {
271 40 : _cleanup_free_ char *prefix = NULL;
272 :
273 20 : prefix = indent(0, flags);
274 20 : if (!prefix)
275 0 : return log_oom();
276 :
277 20 : fprintf(f, "%s};\n\n", prefix);
278 : }
279 :
280 20 : return 0;
281 : }
282 :
283 76 : static void dump_capabilities(
284 : sd_bus_creds *c,
285 : FILE *f,
286 : const char *name,
287 : bool terse,
288 : int (*has)(sd_bus_creds *c, int capability)) {
289 :
290 : unsigned long i, last_cap;
291 76 : unsigned n = 0;
292 : int r;
293 :
294 76 : assert(c);
295 76 : assert(f);
296 76 : assert(name);
297 76 : assert(has);
298 :
299 76 : i = 0;
300 76 : r = has(c, i);
301 76 : if (r < 0)
302 60 : return;
303 :
304 16 : fprintf(f, "%s%s=%s", terse ? " " : "", name, terse ? "" : ansi_highlight());
305 16 : last_cap = cap_last_cap();
306 :
307 : for (;;) {
308 608 : if (r > 0) {
309 :
310 228 : if (n > 0)
311 222 : fputc(' ', f);
312 228 : if (n % 4 == 3)
313 54 : fprintf(f, terse ? "\n " : "\n ");
314 :
315 228 : fprintf(f, "%s", strna(capability_to_name(i)));
316 228 : n++;
317 : }
318 :
319 608 : i++;
320 :
321 608 : if (i > last_cap)
322 16 : break;
323 :
324 592 : r = has(c, i);
325 592 : }
326 :
327 16 : fputs("\n", f);
328 :
329 16 : if (!terse)
330 0 : fputs(ansi_highlight_off(), f);
331 : }
332 :
333 19 : int bus_creds_dump(sd_bus_creds *c, FILE *f, bool terse) {
334 : uid_t owner, audit_loginuid;
335 : uint32_t audit_sessionid;
336 19 : char **cmdline = NULL, **well_known = NULL;
337 : const char *prefix, *color, *suffix, *s;
338 : int r, q, v, w, z;
339 :
340 19 : assert(c);
341 :
342 19 : if (!f)
343 2 : f = stdout;
344 :
345 19 : if (terse) {
346 19 : prefix = " ";
347 19 : suffix = "";
348 19 : color = "";
349 : } else {
350 : const char *off;
351 :
352 0 : prefix = "";
353 0 : color = ansi_highlight();
354 :
355 0 : off = ansi_highlight_off();
356 0 : suffix = strjoina(off, "\n");
357 : }
358 :
359 19 : if (c->mask & SD_BUS_CREDS_PID)
360 4 : fprintf(f, "%sPID=%s"PID_FMT"%s", prefix, color, c->pid, suffix);
361 19 : if (c->mask & SD_BUS_CREDS_TID)
362 2 : fprintf(f, "%sTID=%s"PID_FMT"%s", prefix, color, c->tid, suffix);
363 19 : if (c->mask & SD_BUS_CREDS_PPID) {
364 4 : if (c->ppid == 0)
365 1 : fprintf(f, "%sPPID=%sn/a%s", prefix, color, suffix);
366 : else
367 3 : fprintf(f, "%sPPID=%s"PID_FMT"%s", prefix, color, c->ppid, suffix);
368 : }
369 19 : if (c->mask & SD_BUS_CREDS_TTY)
370 2 : fprintf(f, "%sTTY=%s%s%s", prefix, color, strna(c->tty), suffix);
371 :
372 19 : if (terse && ((c->mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_TID|SD_BUS_CREDS_PPID|SD_BUS_CREDS_TTY))))
373 4 : fputs("\n", f);
374 :
375 19 : if (c->mask & SD_BUS_CREDS_UID)
376 4 : fprintf(f, "%sUID=%s"UID_FMT"%s", prefix, color, c->uid, suffix);
377 19 : if (c->mask & SD_BUS_CREDS_EUID)
378 4 : fprintf(f, "%sEUID=%s"UID_FMT"%s", prefix, color, c->euid, suffix);
379 19 : if (c->mask & SD_BUS_CREDS_SUID)
380 4 : fprintf(f, "%sSUID=%s"UID_FMT"%s", prefix, color, c->suid, suffix);
381 19 : if (c->mask & SD_BUS_CREDS_FSUID)
382 4 : fprintf(f, "%sFSUID=%s"UID_FMT"%s", prefix, color, c->fsuid, suffix);
383 19 : r = sd_bus_creds_get_owner_uid(c, &owner);
384 19 : if (r >= 0)
385 3 : fprintf(f, "%sOwnerUID=%s"UID_FMT"%s", prefix, color, owner, suffix);
386 19 : if (c->mask & SD_BUS_CREDS_GID)
387 4 : fprintf(f, "%sGID=%s"GID_FMT"%s", prefix, color, c->gid, suffix);
388 19 : if (c->mask & SD_BUS_CREDS_EGID)
389 4 : fprintf(f, "%sEGID=%s"GID_FMT"%s", prefix, color, c->egid, suffix);
390 19 : if (c->mask & SD_BUS_CREDS_SGID)
391 4 : fprintf(f, "%sSGID=%s"GID_FMT"%s", prefix, color, c->sgid, suffix);
392 19 : if (c->mask & SD_BUS_CREDS_FSGID)
393 4 : fprintf(f, "%sFSGID=%s"GID_FMT"%s", prefix, color, c->fsgid, suffix);
394 :
395 19 : if (c->mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
396 : unsigned i;
397 :
398 4 : fprintf(f, "%sSupplementaryGIDs=%s", prefix, color);
399 13 : for (i = 0; i < c->n_supplementary_gids; i++)
400 9 : fprintf(f, "%s" GID_FMT, i > 0 ? " " : "", c->supplementary_gids[i]);
401 4 : fprintf(f, "%s", suffix);
402 : }
403 :
404 19 : if (terse && ((c->mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
405 : SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID|
406 15 : SD_BUS_CREDS_SUPPLEMENTARY_GIDS)) || r >= 0))
407 4 : fputs("\n", f);
408 :
409 19 : if (c->mask & SD_BUS_CREDS_COMM)
410 4 : fprintf(f, "%sComm=%s%s%s", prefix, color, c->comm, suffix);
411 19 : if (c->mask & SD_BUS_CREDS_TID_COMM)
412 2 : fprintf(f, "%sTIDComm=%s%s%s", prefix, color, c->tid_comm, suffix);
413 19 : if (c->mask & SD_BUS_CREDS_EXE)
414 3 : fprintf(f, "%sExe=%s%s%s", prefix, color, strna(c->exe), suffix);
415 :
416 19 : if (terse && (c->mask & (SD_BUS_CREDS_EXE|SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM)))
417 4 : fputs("\n", f);
418 :
419 19 : r = sd_bus_creds_get_cmdline(c, &cmdline);
420 19 : if (r >= 0) {
421 : char **i;
422 :
423 4 : fprintf(f, "%sCommandLine=%s", prefix, color);
424 8 : STRV_FOREACH(i, cmdline) {
425 4 : if (i != cmdline)
426 0 : fputc(' ', f);
427 :
428 4 : fputs(*i, f);
429 : }
430 :
431 4 : fprintf(f, "%s", suffix);
432 15 : } else if (r != -ENODATA)
433 0 : fprintf(f, "%sCommandLine=%sn/a%s", prefix, color, suffix);
434 :
435 19 : if (c->mask & SD_BUS_CREDS_SELINUX_CONTEXT)
436 0 : fprintf(f, "%sLabel=%s%s%s", prefix, color, c->label, suffix);
437 19 : if (c->mask & SD_BUS_CREDS_DESCRIPTION)
438 2 : fprintf(f, "%sDescription=%s%s%s", prefix, color, c->description, suffix);
439 :
440 19 : if (terse && (c->mask & (SD_BUS_CREDS_SELINUX_CONTEXT|SD_BUS_CREDS_DESCRIPTION)))
441 2 : fputs("\n", f);
442 :
443 19 : if (c->mask & SD_BUS_CREDS_CGROUP)
444 4 : fprintf(f, "%sCGroup=%s%s%s", prefix, color, c->cgroup, suffix);
445 19 : s = NULL;
446 19 : r = sd_bus_creds_get_unit(c, &s);
447 19 : if (r != -ENODATA)
448 4 : fprintf(f, "%sUnit=%s%s%s", prefix, color, strna(s), suffix);
449 19 : s = NULL;
450 19 : v = sd_bus_creds_get_slice(c, &s);
451 19 : if (v != -ENODATA)
452 4 : fprintf(f, "%sSlice=%s%s%s", prefix, color, strna(s), suffix);
453 19 : s = NULL;
454 19 : q = sd_bus_creds_get_user_unit(c, &s);
455 19 : if (q != -ENODATA)
456 4 : fprintf(f, "%sUserUnit=%s%s%s", prefix, color, strna(s), suffix);
457 19 : s = NULL;
458 19 : w = sd_bus_creds_get_user_slice(c, &s);
459 19 : if (w != -ENODATA)
460 2 : fprintf(f, "%sUserSlice=%s%s%s", prefix, color, strna(s), suffix);
461 19 : s = NULL;
462 19 : z = sd_bus_creds_get_session(c, &s);
463 19 : if (z != -ENODATA)
464 4 : fprintf(f, "%sSession=%s%s%s", prefix, color, strna(s), suffix);
465 :
466 19 : if (terse && ((c->mask & SD_BUS_CREDS_CGROUP) || r != -ENODATA || q != -ENODATA || v != -ENODATA || w != -ENODATA || z != -ENODATA))
467 4 : fputs("\n", f);
468 :
469 19 : r = sd_bus_creds_get_audit_login_uid(c, &audit_loginuid);
470 19 : if (r >= 0)
471 0 : fprintf(f, "%sAuditLoginUID=%s"UID_FMT"%s", prefix, color, audit_loginuid, suffix);
472 19 : else if (r != -ENODATA)
473 0 : fprintf(f, "%sAuditLoginUID=%sn/a%s", prefix, color, suffix);
474 19 : q = sd_bus_creds_get_audit_session_id(c, &audit_sessionid);
475 19 : if (q >= 0)
476 0 : fprintf(f, "%sAuditSessionID=%s%"PRIu32"%s", prefix, color, audit_sessionid, suffix);
477 19 : else if (q != -ENODATA)
478 0 : fprintf(f, "%sAuditSessionID=%sn/a%s", prefix, color, suffix);
479 :
480 19 : if (terse && (r != -ENODATA || q != -ENODATA))
481 0 : fputs("\n", f);
482 :
483 19 : if (c->mask & SD_BUS_CREDS_UNIQUE_NAME)
484 3 : fprintf(f, "%sUniqueName=%s%s%s", prefix, color, c->unique_name, suffix);
485 :
486 19 : if (sd_bus_creds_get_well_known_names(c, &well_known) >= 0) {
487 : char **i;
488 :
489 3 : fprintf(f, "%sWellKnownNames=%s", prefix, color);
490 3 : STRV_FOREACH(i, well_known) {
491 0 : if (i != well_known)
492 0 : fputc(' ', f);
493 :
494 0 : fputs(*i, f);
495 : }
496 :
497 3 : fprintf(f, "%s", suffix);
498 : }
499 :
500 19 : if (terse && (c->mask & SD_BUS_CREDS_UNIQUE_NAME || well_known))
501 3 : fputc('\n', f);
502 :
503 19 : dump_capabilities(c, f, "EffectiveCapabilities", terse, sd_bus_creds_has_effective_cap);
504 19 : dump_capabilities(c, f, "PermittedCapabilities", terse, sd_bus_creds_has_permitted_cap);
505 19 : dump_capabilities(c, f, "InheritableCapabilities", terse, sd_bus_creds_has_inheritable_cap);
506 19 : dump_capabilities(c, f, "BoundingCapabilities", terse, sd_bus_creds_has_bounding_cap);
507 :
508 19 : return 0;
509 : }
510 :
511 : /*
512 : * For details about the file format, see:
513 : *
514 : * http://wiki.wireshark.org/Development/LibpcapFileFormat
515 : */
516 :
517 : typedef struct _packed_ pcap_hdr_s {
518 : uint32_t magic_number; /* magic number */
519 : uint16_t version_major; /* major version number */
520 : uint16_t version_minor; /* minor version number */
521 : int32_t thiszone; /* GMT to local correction */
522 : uint32_t sigfigs; /* accuracy of timestamps */
523 : uint32_t snaplen; /* max length of captured packets, in octets */
524 : uint32_t network; /* data link type */
525 : } pcap_hdr_t ;
526 :
527 : typedef struct _packed_ pcaprec_hdr_s {
528 : uint32_t ts_sec; /* timestamp seconds */
529 : uint32_t ts_usec; /* timestamp microseconds */
530 : uint32_t incl_len; /* number of octets of packet saved in file */
531 : uint32_t orig_len; /* actual length of packet */
532 : } pcaprec_hdr_t;
533 :
534 0 : int bus_pcap_header(size_t snaplen, FILE *f) {
535 :
536 0 : pcap_hdr_t hdr = {
537 : .magic_number = 0xa1b2c3d4U,
538 : .version_major = 2,
539 : .version_minor = 4,
540 : .thiszone = 0, /* UTC */
541 : .sigfigs = 0,
542 : .network = 231, /* D-Bus */
543 : };
544 :
545 0 : if (!f)
546 0 : f = stdout;
547 :
548 0 : assert(snaplen > 0);
549 0 : assert((size_t) (uint32_t) snaplen == snaplen);
550 :
551 0 : hdr.snaplen = (uint32_t) snaplen;
552 :
553 0 : fwrite(&hdr, 1, sizeof(hdr), f);
554 0 : fflush(f);
555 :
556 0 : return 0;
557 : }
558 :
559 0 : int bus_message_pcap_frame(sd_bus_message *m, size_t snaplen, FILE *f) {
560 : struct bus_body_part *part;
561 0 : pcaprec_hdr_t hdr = {};
562 : struct timeval tv;
563 : unsigned i;
564 : size_t w;
565 :
566 0 : if (!f)
567 0 : f = stdout;
568 :
569 0 : assert(m);
570 0 : assert(snaplen > 0);
571 0 : assert((size_t) (uint32_t) snaplen == snaplen);
572 :
573 0 : if (m->realtime != 0)
574 0 : timeval_store(&tv, m->realtime);
575 : else
576 0 : assert_se(gettimeofday(&tv, NULL) >= 0);
577 :
578 0 : hdr.ts_sec = tv.tv_sec;
579 0 : hdr.ts_usec = tv.tv_usec;
580 0 : hdr.orig_len = BUS_MESSAGE_SIZE(m);
581 0 : hdr.incl_len = MIN(hdr.orig_len, snaplen);
582 :
583 : /* write the pcap header */
584 0 : fwrite(&hdr, 1, sizeof(hdr), f);
585 :
586 : /* write the dbus header */
587 0 : w = MIN(BUS_MESSAGE_BODY_BEGIN(m), snaplen);
588 0 : fwrite(m->header, 1, w, f);
589 0 : snaplen -= w;
590 :
591 : /* write the dbus body */
592 0 : MESSAGE_FOREACH_PART(part, i, m) {
593 0 : if (snaplen <= 0)
594 0 : break;
595 :
596 0 : w = MIN(part->size, snaplen);
597 0 : fwrite(part->data, 1, w, f);
598 0 : snaplen -= w;
599 : }
600 :
601 0 : fflush(f);
602 :
603 0 : return 0;
604 : }
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