2 * Routines for capture options setting
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
40 #include <epan/packet.h>
41 #include <epan/prefs.h>
42 #include "capture_ui_utils.h"
44 #include "capture_opts.h"
45 #include "ringbuffer.h"
46 #include "clopts_common.h"
47 #include "cmdarg_err.h"
49 #include "capture_ifinfo.h"
50 #include "capture-pcap-util.h"
51 #include <wsutil/file_util.h>
53 static gboolean capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe);
57 capture_opts_init(capture_options *capture_opts, void *cf)
59 capture_opts->cf = cf;
60 capture_opts->ifaces = g_array_new(FALSE, FALSE, sizeof(interface_options));
61 capture_opts->all_ifaces = g_array_new(FALSE, FALSE, sizeof(interface_t));
62 capture_opts->num_selected = 0;
63 capture_opts->default_options.name = NULL;
64 capture_opts->default_options.descr = NULL;
65 capture_opts->default_options.cfilter = NULL;
66 capture_opts->default_options.has_snaplen = FALSE;
67 capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
68 capture_opts->default_options.linktype = -1;
69 capture_opts->default_options.promisc_mode = TRUE;
70 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
71 capture_opts->default_options.buffer_size = DEFAULT_CAPTURE_BUFFER_SIZE;
73 capture_opts->default_options.monitor_mode = FALSE;
74 #ifdef HAVE_PCAP_REMOTE
75 capture_opts->default_options.src_type = CAPTURE_IFLOCAL;
76 capture_opts->default_options.remote_host = NULL;
77 capture_opts->default_options.remote_port = NULL;
78 capture_opts->default_options.auth_type = CAPTURE_AUTH_NULL;
79 capture_opts->default_options.auth_username = NULL;
80 capture_opts->default_options.auth_password = NULL;
81 capture_opts->default_options.datatx_udp = FALSE;
82 capture_opts->default_options.nocap_rpcap = TRUE;
83 capture_opts->default_options.nocap_local = FALSE;
85 #ifdef HAVE_PCAP_SETSAMPLING
86 capture_opts->default_options.sampling_method = CAPTURE_SAMP_NONE;
87 capture_opts->default_options.sampling_param = 0;
89 capture_opts->saving_to_file = FALSE;
90 capture_opts->save_file = NULL;
91 capture_opts->group_read_access = FALSE;
92 #ifdef PCAP_NG_DEFAULT
93 capture_opts->use_pcapng = TRUE; /* Save as pcap-ng by default */
95 capture_opts->use_pcapng = FALSE; /* Save as pcap by default */
97 capture_opts->real_time_mode = TRUE;
98 capture_opts->show_info = TRUE;
99 capture_opts->quit_after_cap = getenv("WIRESHARK_QUIT_AFTER_CAPTURE") ? TRUE : FALSE;
100 capture_opts->restart = FALSE;
102 capture_opts->multi_files_on = FALSE;
103 capture_opts->has_file_duration = FALSE;
104 capture_opts->file_duration = 60; /* 1 min */
105 capture_opts->has_ring_num_files = FALSE;
106 capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
108 capture_opts->has_autostop_files = FALSE;
109 capture_opts->autostop_files = 1;
110 capture_opts->has_autostop_packets = FALSE;
111 capture_opts->autostop_packets = 0;
112 capture_opts->has_autostop_filesize = FALSE;
113 capture_opts->autostop_filesize = 1024; /* 1 MB */
114 capture_opts->has_autostop_duration = FALSE;
115 capture_opts->autostop_duration = 60; /* 1 min */
118 capture_opts->fork_child = -1; /* invalid process handle */
120 capture_opts->signal_pipe_write_fd = -1;
122 capture_opts->state = CAPTURE_STOPPED;
123 capture_opts->output_to_pipe = FALSE;
125 capture_opts->owner = getuid();
126 capture_opts->group = getgid();
128 capture_opts->session_started = FALSE;
132 /* log content of capture_opts */
134 capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts) {
137 g_log(log_domain, log_level, "CAPTURE OPTIONS :");
138 g_log(log_domain, log_level, "CFile : %p", capture_opts->cf);
140 for (i = 0; i < capture_opts->ifaces->len; i++) {
141 interface_options interface_opts;
143 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
144 g_log(log_domain, log_level, "Interface name[%02d] : %s", i, interface_opts.name ? interface_opts.name : "(unspecified)");
145 g_log(log_domain, log_level, "Interface description[%02d] : %s", i, interface_opts.descr ? interface_opts.descr : "(unspecified)");
146 g_log(log_domain, log_level, "Console display name[%02d]: %s", i, interface_opts.console_display_name ? interface_opts.console_display_name : "(unspecified)");
147 g_log(log_domain, log_level, "Capture filter[%02d] : %s", i, interface_opts.cfilter ? interface_opts.cfilter : "(unspecified)");
148 g_log(log_domain, log_level, "Snap length[%02d] (%u) : %d", i, interface_opts.has_snaplen, interface_opts.snaplen);
149 g_log(log_domain, log_level, "Link Type[%02d] : %d", i, interface_opts.linktype);
150 g_log(log_domain, log_level, "Promiscuous Mode[%02d]: %s", i, interface_opts.promisc_mode?"TRUE":"FALSE");
151 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
152 g_log(log_domain, log_level, "Buffer size[%02d] : %d (MB)", i, interface_opts.buffer_size);
154 g_log(log_domain, log_level, "Monitor Mode[%02d] : %s", i, interface_opts.monitor_mode?"TRUE":"FALSE");
155 #ifdef HAVE_PCAP_REMOTE
156 g_log(log_domain, log_level, "Capture source[%02d] : %s", i,
157 interface_opts.src_type == CAPTURE_IFLOCAL ? "Local interface" :
158 interface_opts.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
160 if (interface_opts.src_type == CAPTURE_IFREMOTE) {
161 g_log(log_domain, log_level, "Remote host[%02d] : %s", i, interface_opts.remote_host ? interface_opts.remote_host : "(unspecified)");
162 g_log(log_domain, log_level, "Remote port[%02d] : %s", i, interface_opts.remote_port ? interface_opts.remote_port : "(unspecified)");
164 g_log(log_domain, log_level, "Authentication[%02d] : %s", i,
165 interface_opts.auth_type == CAPTURE_AUTH_NULL ? "Null" :
166 interface_opts.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
168 if (interface_opts.auth_type == CAPTURE_AUTH_PWD) {
169 g_log(log_domain, log_level, "Auth username[%02d] : %s", i, interface_opts.auth_username ? interface_opts.auth_username : "(unspecified)");
170 g_log(log_domain, log_level, "Auth password[%02d] : <hidden>", i);
172 g_log(log_domain, log_level, "UDP data tfer[%02d] : %u", i, interface_opts.datatx_udp);
173 g_log(log_domain, log_level, "No cap. RPCAP[%02d] : %u", i, interface_opts.nocap_rpcap);
174 g_log(log_domain, log_level, "No cap. local[%02d] : %u", i, interface_opts.nocap_local);
176 #ifdef HAVE_PCAP_SETSAMPLING
177 g_log(log_domain, log_level, "Sampling meth.[%02d] : %d", i, interface_opts.sampling_method);
178 g_log(log_domain, log_level, "Sampling param.[%02d] : %d", i, interface_opts.sampling_param);
181 g_log(log_domain, log_level, "Interface name[df] : %s", capture_opts->default_options.name ? capture_opts->default_options.name : "(unspecified)");
182 g_log(log_domain, log_level, "Interface Descr[df] : %s", capture_opts->default_options.descr ? capture_opts->default_options.descr : "(unspecified)");
183 g_log(log_domain, log_level, "Capture filter[df] : %s", capture_opts->default_options.cfilter ? capture_opts->default_options.cfilter : "(unspecified)");
184 g_log(log_domain, log_level, "Snap length[df] (%u) : %d", capture_opts->default_options.has_snaplen, capture_opts->default_options.snaplen);
185 g_log(log_domain, log_level, "Link Type[df] : %d", capture_opts->default_options.linktype);
186 g_log(log_domain, log_level, "Promiscuous Mode[df]: %s", capture_opts->default_options.promisc_mode?"TRUE":"FALSE");
187 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
188 g_log(log_domain, log_level, "Buffer size[df] : %d (MB)", capture_opts->default_options.buffer_size);
190 g_log(log_domain, log_level, "Monitor Mode[df] : %s", capture_opts->default_options.monitor_mode?"TRUE":"FALSE");
191 #ifdef HAVE_PCAP_REMOTE
192 g_log(log_domain, log_level, "Capture source[df] : %s",
193 capture_opts->default_options.src_type == CAPTURE_IFLOCAL ? "Local interface" :
194 capture_opts->default_options.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
196 if (capture_opts->default_options.src_type == CAPTURE_IFREMOTE) {
197 g_log(log_domain, log_level, "Remote host[df] : %s", capture_opts->default_options.remote_host ? capture_opts->default_options.remote_host : "(unspecified)");
198 g_log(log_domain, log_level, "Remote port[df] : %s", capture_opts->default_options.remote_port ? capture_opts->default_options.remote_port : "(unspecified)");
200 g_log(log_domain, log_level, "Authentication[df] : %s",
201 capture_opts->default_options.auth_type == CAPTURE_AUTH_NULL ? "Null" :
202 capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
204 if (capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD) {
205 g_log(log_domain, log_level, "Auth username[df] : %s", capture_opts->default_options.auth_username ? capture_opts->default_options.auth_username : "(unspecified)");
206 g_log(log_domain, log_level, "Auth password[df] : <hidden>");
208 g_log(log_domain, log_level, "UDP data tfer[df] : %u", capture_opts->default_options.datatx_udp);
209 g_log(log_domain, log_level, "No cap. RPCAP[df] : %u", capture_opts->default_options.nocap_rpcap);
210 g_log(log_domain, log_level, "No cap. local[df] : %u", capture_opts->default_options.nocap_local);
212 #ifdef HAVE_PCAP_SETSAMPLING
213 g_log(log_domain, log_level, "Sampling meth. [df] : %d", capture_opts->default_options.sampling_method);
214 g_log(log_domain, log_level, "Sampling param.[df] : %d", capture_opts->default_options.sampling_param);
216 g_log(log_domain, log_level, "SavingToFile : %u", capture_opts->saving_to_file);
217 g_log(log_domain, log_level, "SaveFile : %s", (capture_opts->save_file) ? capture_opts->save_file : "");
218 g_log(log_domain, log_level, "GroupReadAccess : %u", capture_opts->group_read_access);
219 g_log(log_domain, log_level, "Fileformat : %s", (capture_opts->use_pcapng) ? "PCAPNG" : "PCAP");
220 g_log(log_domain, log_level, "RealTimeMode : %u", capture_opts->real_time_mode);
221 g_log(log_domain, log_level, "ShowInfo : %u", capture_opts->show_info);
222 g_log(log_domain, log_level, "QuitAfterCap : %u", capture_opts->quit_after_cap);
224 g_log(log_domain, log_level, "MultiFilesOn : %u", capture_opts->multi_files_on);
225 g_log(log_domain, log_level, "FileDuration (%u) : %u", capture_opts->has_file_duration, capture_opts->file_duration);
226 g_log(log_domain, log_level, "RingNumFiles (%u) : %u", capture_opts->has_ring_num_files, capture_opts->ring_num_files);
228 g_log(log_domain, log_level, "AutostopFiles (%u) : %u", capture_opts->has_autostop_files, capture_opts->autostop_files);
229 g_log(log_domain, log_level, "AutostopPackets (%u) : %u", capture_opts->has_autostop_packets, capture_opts->autostop_packets);
230 g_log(log_domain, log_level, "AutostopFilesize(%u) : %u (KB)", capture_opts->has_autostop_filesize, capture_opts->autostop_filesize);
231 g_log(log_domain, log_level, "AutostopDuration(%u) : %u", capture_opts->has_autostop_duration, capture_opts->autostop_duration);
233 g_log(log_domain, log_level, "ForkChild : %d", capture_opts->fork_child);
235 g_log(log_domain, log_level, "SignalPipeWrite : %d", capture_opts->signal_pipe_write_fd);
240 * Given a string of the form "<autostop criterion>:<value>", as might appear
241 * as an argument to a "-a" option, parse it and set the criterion in
242 * question. Return an indication of whether it succeeded or failed
246 set_autostop_criterion(capture_options *capture_opts, const char *autostoparg)
250 colonp = strchr(autostoparg, ':');
258 * Skip over any white space (there probably won't be any, but
259 * as we allow it in the preferences file, we might as well
262 while (isspace((guchar)*p))
266 * Put the colon back, so if our caller uses, in an
267 * error message, the string they passed us, the message
273 if (strcmp(autostoparg,"duration") == 0) {
274 capture_opts->has_autostop_duration = TRUE;
275 capture_opts->autostop_duration = get_positive_int(p,"autostop duration");
276 } else if (strcmp(autostoparg,"filesize") == 0) {
277 capture_opts->has_autostop_filesize = TRUE;
278 capture_opts->autostop_filesize = get_positive_int(p,"autostop filesize");
279 } else if (strcmp(autostoparg,"files") == 0) {
280 capture_opts->multi_files_on = TRUE;
281 capture_opts->has_autostop_files = TRUE;
282 capture_opts->autostop_files = get_positive_int(p,"autostop files");
286 *colonp = ':'; /* put the colon back */
291 * Given a string of the form "<ring buffer file>:<duration>", as might appear
292 * as an argument to a "-b" option, parse it and set the arguments in
293 * question. Return an indication of whether it succeeded or failed
297 get_ring_arguments(capture_options *capture_opts, const char *arg)
299 gchar *p = NULL, *colonp;
301 colonp = strchr(arg, ':');
309 * Skip over any white space (there probably won't be any, but
310 * as we allow it in the preferences file, we might as well
313 while (isspace((guchar)*p))
317 * Put the colon back, so if our caller uses, in an
318 * error message, the string they passed us, the message
325 if (strcmp(arg,"files") == 0) {
326 capture_opts->has_ring_num_files = TRUE;
327 capture_opts->ring_num_files = get_positive_int(p, "number of ring buffer files");
328 } else if (strcmp(arg,"filesize") == 0) {
329 capture_opts->has_autostop_filesize = TRUE;
330 capture_opts->autostop_filesize = get_positive_int(p, "ring buffer filesize");
331 } else if (strcmp(arg,"duration") == 0) {
332 capture_opts->has_file_duration = TRUE;
333 capture_opts->file_duration = get_positive_int(p, "ring buffer duration");
336 *colonp = ':'; /* put the colon back */
340 #ifdef HAVE_PCAP_SETSAMPLING
342 * Given a string of the form "<sampling type>:<value>", as might appear
343 * as an argument to a "-m" option, parse it and set the arguments in
344 * question. Return an indication of whether it succeeded or failed
348 get_sampling_arguments(capture_options *capture_opts, const char *arg)
350 gchar *p = NULL, *colonp;
352 colonp = strchr(arg, ':');
359 while (isspace((guchar)*p))
366 if (strcmp(arg, "count") == 0) {
367 if (capture_opts->ifaces->len > 0) {
368 interface_options interface_opts;
370 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
371 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
372 interface_opts.sampling_method = CAPTURE_SAMP_BY_COUNT;
373 interface_opts.sampling_param = get_positive_int(p, "sampling count");
374 g_array_append_val(capture_opts->ifaces, interface_opts);
376 capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_COUNT;
377 capture_opts->default_options.sampling_param = get_positive_int(p, "sampling count");
379 } else if (strcmp(arg, "timer") == 0) {
380 if (capture_opts->ifaces->len > 0) {
381 interface_options interface_opts;
383 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
384 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
385 interface_opts.sampling_method = CAPTURE_SAMP_BY_TIMER;
386 interface_opts.sampling_param = get_positive_int(p, "sampling timer");
387 g_array_append_val(capture_opts->ifaces, interface_opts);
389 capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_TIMER;
390 capture_opts->default_options.sampling_param = get_positive_int(p, "sampling timer");
398 #ifdef HAVE_PCAP_REMOTE
400 * Given a string of the form "<username>:<password>", as might appear
401 * as an argument to a "-A" option, parse it and set the arguments in
402 * question. Return an indication of whether it succeeded or failed
406 get_auth_arguments(capture_options *capture_opts, const char *arg)
408 gchar *p = NULL, *colonp;
410 colonp = strchr(arg, ':');
417 while (isspace((guchar)*p))
420 if (capture_opts->ifaces->len > 0) {
421 interface_options interface_opts;
423 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
424 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
425 interface_opts.auth_type = CAPTURE_AUTH_PWD;
426 interface_opts.auth_username = g_strdup(arg);
427 interface_opts.auth_password = g_strdup(p);
428 g_array_append_val(capture_opts->ifaces, interface_opts);
430 capture_opts->default_options.auth_type = CAPTURE_AUTH_PWD;
431 capture_opts->default_options.auth_username = g_strdup(arg);
432 capture_opts->default_options.auth_password = g_strdup(p);
440 capture_opts_add_iface_opt(capture_options *capture_opts, const char *optarg_str_p)
448 interface_options interface_opts;
451 * If the argument is a number, treat it as an index into the list
452 * of adapters, as printed by "tshark -D".
454 * This should be OK on UNIX systems, as interfaces shouldn't have
455 * names that begin with digits. It can be useful on Windows, where
456 * more than one interface can have the same name.
458 adapter_index = strtol(optarg_str_p, &p, 10);
459 if (p != NULL && *p == '\0') {
460 if (adapter_index < 0) {
461 cmdarg_err("The specified adapter index is a negative number");
464 if (adapter_index > INT_MAX) {
465 cmdarg_err("The specified adapter index is too large (greater than %d)",
469 if (adapter_index == 0) {
470 cmdarg_err("There is no interface with that adapter index");
473 if_list = capture_interface_list(&err, &err_str);
474 if (if_list == NULL) {
477 case CANT_GET_INTERFACE_LIST:
479 cmdarg_err("%s", err_str);
483 case NO_INTERFACES_FOUND:
484 cmdarg_err("There are no interfaces on which a capture can be done");
489 if_info = (if_info_t *)g_list_nth_data(if_list, (int)(adapter_index - 1));
490 if (if_info == NULL) {
491 cmdarg_err("There is no interface with that adapter index");
494 interface_opts.name = g_strdup(if_info->name);
495 if (if_info->friendly_name != NULL) {
497 * We have a friendly name for the interface, so display that
498 * instead of the interface name/guid.
500 * XXX - on UN*X, the interface name is not quite so ugly,
501 * and might be more familiar to users; display them both?
503 interface_opts.console_display_name = g_strdup(if_info->friendly_name);
505 /* fallback to the interface name */
506 interface_opts.console_display_name = g_strdup(if_info->name);
508 free_interface_list(if_list);
511 * Retrieve the interface list so that we can search for the
512 * specified option amongst both the interface names and the
513 * friendly names and so that we find the friendly name even
514 * if an interface name was specified.
516 * If we can't get the list, just use the specified option as
517 * the interface name, so that the user can try specifying an
518 * interface explicitly for testing purposes.
520 if_list = capture_interface_list(&err, NULL);
521 if (if_list != NULL) {
522 /* try and do an exact match (case insensitive) */
527 for (if_entry = g_list_first(if_list); if_entry != NULL;
528 if_entry = g_list_next(if_entry))
530 if_info = (if_info_t *)if_entry->data;
531 /* exact name check */
532 if (g_ascii_strcasecmp(if_info->name, optarg_str_p) == 0) {
533 /* exact match on the interface name, use that for displaying etc */
534 interface_opts.name = g_strdup(if_info->name);
536 if (if_info->friendly_name != NULL) {
538 * If we have a friendly name, use that for the
539 * console display name, as it is the basis for
540 * the auto generated temp filename.
542 interface_opts.console_display_name = g_strdup(if_info->friendly_name);
544 interface_opts.console_display_name = g_strdup(if_info->name);
550 /* exact friendly name check */
551 if (if_info->friendly_name != NULL &&
552 g_ascii_strcasecmp(if_info->friendly_name, optarg_str_p) == 0) {
553 /* exact match - use the friendly name for display */
554 interface_opts.name = g_strdup(if_info->name);
555 interface_opts.console_display_name = g_strdup(if_info->friendly_name);
561 /* didn't find, attempt a case insensitive prefix match of the friendly name*/
563 size_t prefix_length;
565 prefix_length = strlen(optarg_str_p);
566 for (if_entry = g_list_first(if_list); if_entry != NULL;
567 if_entry = g_list_next(if_entry))
569 if_info = (if_info_t *)if_entry->data;
571 if (if_info->friendly_name != NULL &&
572 g_ascii_strncasecmp(if_info->friendly_name, optarg_str_p, prefix_length) == 0) {
573 /* prefix match - use the friendly name for display */
574 interface_opts.name = g_strdup(if_info->name);
575 interface_opts.console_display_name = g_strdup(if_info->friendly_name);
583 * We didn't find the interface in the list; just use
584 * the specified name, so that, for example, if an
585 * interface doesn't show up in the list for some
586 * reason, the user can try specifying it explicitly
587 * for testing purposes.
589 interface_opts.name = g_strdup(optarg_str_p);
590 interface_opts.console_display_name = g_strdup(optarg_str_p);
592 free_interface_list(if_list);
594 interface_opts.name = g_strdup(optarg_str_p);
595 interface_opts.console_display_name = g_strdup(optarg_str_p);
599 /* We don't set iface_descr here because doing so requires
600 * capture_ui_utils.c which requires epan/prefs.c which is
601 * probably a bit too much dependency for here...
603 interface_opts.descr = g_strdup(capture_opts->default_options.descr);
604 interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
605 interface_opts.snaplen = capture_opts->default_options.snaplen;
606 interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
607 interface_opts.linktype = capture_opts->default_options.linktype;
608 interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
609 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
610 interface_opts.buffer_size = capture_opts->default_options.buffer_size;
612 interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
613 #ifdef HAVE_PCAP_REMOTE
614 interface_opts.src_type = capture_opts->default_options.src_type;
615 interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
616 interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
617 interface_opts.auth_type = capture_opts->default_options.auth_type;
618 interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
619 interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
620 interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
621 interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
622 interface_opts.nocap_local = capture_opts->default_options.nocap_local;
624 #ifdef HAVE_PCAP_SETSAMPLING
625 interface_opts.sampling_method = capture_opts->default_options.sampling_method;
626 interface_opts.sampling_param = capture_opts->default_options.sampling_param;
629 g_array_append_val(capture_opts->ifaces, interface_opts);
636 capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
641 case 'a': /* autostop criteria */
642 if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
643 cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
647 #ifdef HAVE_PCAP_REMOTE
649 if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
650 cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
655 case 'b': /* Ringbuffer option */
656 capture_opts->multi_files_on = TRUE;
657 if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
658 cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
662 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
663 case 'B': /* Buffer size */
664 if (capture_opts->ifaces->len > 0) {
665 interface_options interface_opts;
667 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
668 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
669 interface_opts.buffer_size = get_positive_int(optarg_str_p, "buffer size");
670 g_array_append_val(capture_opts->ifaces, interface_opts);
672 capture_opts->default_options.buffer_size = get_positive_int(optarg_str_p, "buffer size");
676 case 'c': /* Capture n packets */
677 capture_opts->has_autostop_packets = TRUE;
678 capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
680 case 'f': /* capture filter */
681 if (capture_opts->ifaces->len > 0) {
682 interface_options interface_opts;
684 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
685 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
686 g_free(interface_opts.cfilter);
687 interface_opts.cfilter = g_strdup(optarg_str_p);
688 g_array_append_val(capture_opts->ifaces, interface_opts);
690 g_free(capture_opts->default_options.cfilter);
691 capture_opts->default_options.cfilter = g_strdup(optarg_str_p);
694 case 'g': /* enable group read access on the capture file(s) */
695 capture_opts->group_read_access = TRUE;
697 case 'H': /* Hide capture info dialog box */
698 capture_opts->show_info = FALSE;
700 case 'i': /* Use interface x */
701 status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
706 #ifdef HAVE_PCAP_CREATE
707 case 'I': /* Capture in monitor mode */
708 if (capture_opts->ifaces->len > 0) {
709 interface_options interface_opts;
711 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
712 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
713 interface_opts.monitor_mode = TRUE;
714 g_array_append_val(capture_opts->ifaces, interface_opts);
716 capture_opts->default_options.monitor_mode = TRUE;
720 case 'k': /* Start capture immediately */
721 *start_capture = TRUE;
723 /*case 'l':*/ /* Automatic scrolling in live capture mode */
724 #ifdef HAVE_PCAP_SETSAMPLING
726 if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
727 cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
732 case 'n': /* Use pcapng format */
733 capture_opts->use_pcapng = TRUE;
735 case 'p': /* Don't capture in promiscuous mode */
736 if (capture_opts->ifaces->len > 0) {
737 interface_options interface_opts;
739 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
740 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
741 interface_opts.promisc_mode = FALSE;
742 g_array_append_val(capture_opts->ifaces, interface_opts);
744 capture_opts->default_options.promisc_mode = FALSE;
747 case 'P': /* Use pcap format */
748 capture_opts->use_pcapng = FALSE;
750 #ifdef HAVE_PCAP_REMOTE
752 if (capture_opts->ifaces->len > 0) {
753 interface_options interface_opts;
755 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
756 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
757 interface_opts.nocap_rpcap = FALSE;
758 g_array_append_val(capture_opts->ifaces, interface_opts);
760 capture_opts->default_options.nocap_rpcap = FALSE;
764 case 's': /* Set the snapshot (capture) length */
765 snaplen = get_natural_int(optarg_str_p, "snapshot length");
767 * Make a snapshot length of 0 equivalent to the maximum packet
768 * length, mirroring what tcpdump does.
771 snaplen = WTAP_MAX_PACKET_SIZE;
772 if (capture_opts->ifaces->len > 0) {
773 interface_options interface_opts;
775 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
776 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
777 interface_opts.has_snaplen = TRUE;
778 interface_opts.snaplen = snaplen;
779 g_array_append_val(capture_opts->ifaces, interface_opts);
781 capture_opts->default_options.snaplen = snaplen;
782 capture_opts->default_options.has_snaplen = TRUE;
785 case 'S': /* "Real-Time" mode: used for following file ala tail -f */
786 capture_opts->real_time_mode = TRUE;
788 #ifdef HAVE_PCAP_REMOTE
790 if (capture_opts->ifaces->len > 0) {
791 interface_options interface_opts;
793 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
794 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
795 interface_opts.datatx_udp = TRUE;
796 g_array_append_val(capture_opts->ifaces, interface_opts);
798 capture_opts->default_options.datatx_udp = TRUE;
802 case 'w': /* Write to capture file x */
803 capture_opts->saving_to_file = TRUE;
804 g_free(capture_opts->save_file);
805 capture_opts->save_file = g_strdup(optarg_str_p);
806 status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
808 case 'y': /* Set the pcap data link type */
809 if (capture_opts->ifaces->len > 0) {
810 interface_options interface_opts;
812 interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
813 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
814 interface_opts.linktype = linktype_name_to_val(optarg_str_p);
815 if (interface_opts.linktype == -1) {
816 cmdarg_err("The specified data link type \"%s\" isn't valid",
820 g_array_append_val(capture_opts->ifaces, interface_opts);
822 capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
823 if (capture_opts->default_options.linktype == -1) {
824 cmdarg_err("The specified data link type \"%s\" isn't valid",
831 /* the caller is responsible to send us only the right opt's */
832 g_assert_not_reached();
839 capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name,
840 gboolean monitor_mode)
843 data_link_info_t *data_link_info;
845 if (caps->can_set_rfmon)
846 printf("Data link types of interface %s when %sin monitor mode (use option -y to set):\n",
847 name, monitor_mode ? "" : "not ");
849 printf("Data link types of interface %s (use option -y to set):\n", name);
850 for (lt_entry = caps->data_link_types; lt_entry != NULL;
851 lt_entry = g_list_next(lt_entry)) {
852 data_link_info = (data_link_info_t *)lt_entry->data;
853 printf(" %s", data_link_info->name);
854 if (data_link_info->description != NULL)
855 printf(" (%s)", data_link_info->description);
857 printf(" (not supported)");
862 /* Print an ASCII-formatted list of interfaces. */
864 capture_opts_print_interfaces(GList *if_list)
870 i = 1; /* Interface id number */
871 for (if_entry = g_list_first(if_list); if_entry != NULL;
872 if_entry = g_list_next(if_entry)) {
873 if_info = (if_info_t *)if_entry->data;
874 printf("%d. %s", i++, if_info->name);
876 /* Print the interface friendly name, if it exists;
877 if not fall back to vendor description, if it exists. */
878 if (if_info->friendly_name != NULL){
879 printf(" (%s)", if_info->friendly_name);
881 if (if_info->vendor_description != NULL)
882 printf(" (%s)", if_info->vendor_description);
890 capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min)
893 interface_options interface_opts;
895 if (capture_opts->ifaces->len > 0) {
896 for (i = 0; i < capture_opts->ifaces->len; i++) {
897 interface_opts = g_array_index(capture_opts->ifaces, interface_options, 0);
898 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, 0);
899 if (interface_opts.snaplen < 1)
900 interface_opts.snaplen = WTAP_MAX_PACKET_SIZE;
901 else if (interface_opts.snaplen < snaplen_min)
902 interface_opts.snaplen = snaplen_min;
903 g_array_append_val(capture_opts->ifaces, interface_opts);
906 if (capture_opts->default_options.snaplen < 1)
907 capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
908 else if (capture_opts->default_options.snaplen < snaplen_min)
909 capture_opts->default_options.snaplen = snaplen_min;
915 capture_opts_trim_ring_num_files(capture_options *capture_opts)
917 /* Check the value range of the ring_num_files parameter */
918 if (capture_opts->ring_num_files > RINGBUFFER_MAX_NUM_FILES) {
919 cmdarg_err("Too many ring buffer files (%u). Reducing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MAX_NUM_FILES);
920 capture_opts->ring_num_files = RINGBUFFER_MAX_NUM_FILES;
921 } else if (capture_opts->ring_num_files > RINGBUFFER_WARN_NUM_FILES) {
922 cmdarg_err("%u is a lot of ring buffer files.\n", capture_opts->ring_num_files);
924 #if RINGBUFFER_MIN_NUM_FILES > 0
925 else if (capture_opts->ring_num_files < RINGBUFFER_MIN_NUM_FILES)
926 cmdarg_err("Too few ring buffer files (%u). Increasing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MIN_NUM_FILES);
927 capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
933 capture_opts_trim_iface(capture_options *capture_opts, const char *capture_device)
937 /* Did the user specify an interface to use? */
938 if (capture_opts->num_selected != 0 || capture_opts->ifaces->len != 0) {
939 /* yes they did, return immediately - nothing further to do here */
943 /* No - is a default specified in the preferences file? */
944 if (capture_device != NULL) {
946 status = capture_opts_add_iface_opt(capture_opts, capture_device);
949 /* No default in preferences file, just pick the first interface from the list of interfaces. */
950 return capture_opts_add_iface_opt(capture_opts, "1");
954 #define S_IFIFO _S_IFIFO
957 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
960 /* copied from filesystem.c */
962 capture_opts_test_for_fifo(const char *path)
966 if (ws_stat64(path, &statb) < 0)
969 if (S_ISFIFO(statb.st_mode))
976 capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe)
982 if (save_file != NULL) {
983 /* We're writing to a capture file. */
984 if (strcmp(save_file, "-") == 0) {
985 /* Writing to stdout. */
986 /* XXX - should we check whether it's a pipe? It's arguably
987 silly to do "-w - >output_file" rather than "-w output_file",
988 but by not checking we might be violating the Principle Of
989 Least Astonishment. */
992 /* not writing to stdout, test for a FIFO (aka named pipe) */
993 err = capture_opts_test_for_fifo(save_file);
996 case ENOENT: /* it doesn't exist, so we'll be creating it,
997 and it won't be a FIFO */
998 case 0: /* found it, but it's not a FIFO */
1001 case ESPIPE: /* it is a FIFO */
1005 default: /* couldn't stat it */
1006 break; /* ignore: later attempt to open */
1007 /* will generate a nice msg */
1016 * Add all non-hidden selected interfaces in the "all interfaces" list
1017 * to the list of interfaces for the capture.
1020 collect_ifaces(capture_options *capture_opts)
1024 interface_options interface_opts;
1026 /* Empty out the existing list of interfaces. */
1027 for (i = capture_opts->ifaces->len; i != 0; i--) {
1028 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i - 1);
1029 g_free(interface_opts.name);
1030 g_free(interface_opts.descr);
1031 if (interface_opts.console_display_name != NULL)
1032 g_free(interface_opts.console_display_name);
1033 g_free(interface_opts.cfilter);
1034 #ifdef HAVE_PCAP_REMOTE
1035 if (interface_opts.src_type == CAPTURE_IFREMOTE) {
1036 g_free(interface_opts.remote_host);
1037 g_free(interface_opts.remote_port);
1038 g_free(interface_opts.auth_username);
1039 g_free(interface_opts.auth_password);
1042 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i - 1);
1045 /* Now fill the list up again. */
1046 for (i = 0; i < capture_opts->all_ifaces->len; i++) {
1047 device = g_array_index(capture_opts->all_ifaces, interface_t, i);
1048 if (!device.hidden && device.selected) {
1049 interface_opts.name = g_strdup(device.name);
1050 interface_opts.descr = g_strdup(device.display_name);
1051 interface_opts.console_display_name = g_strdup(device.name);
1052 interface_opts.linktype = device.active_dlt;
1053 interface_opts.cfilter = g_strdup(device.cfilter);
1054 interface_opts.snaplen = device.snaplen;
1055 interface_opts.has_snaplen = device.has_snaplen;
1056 interface_opts.promisc_mode = device.pmode;
1057 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1058 interface_opts.buffer_size = device.buffer;
1060 #ifdef HAVE_PCAP_CREATE
1061 interface_opts.monitor_mode = device.monitor_mode_enabled;
1063 #ifdef HAVE_PCAP_REMOTE
1064 interface_opts.src_type = CAPTURE_IFREMOTE;
1065 interface_opts.remote_host = g_strdup(device.remote_opts.remote_host_opts.remote_host);
1066 interface_opts.remote_port = g_strdup(device.remote_opts.remote_host_opts.remote_port);
1067 interface_opts.auth_type = device.remote_opts.remote_host_opts.auth_type;
1068 interface_opts.auth_username = g_strdup(device.remote_opts.remote_host_opts.auth_username);
1069 interface_opts.auth_password = g_strdup(device.remote_opts.remote_host_opts.auth_password);
1070 interface_opts.datatx_udp = device.remote_opts.remote_host_opts.datatx_udp;
1071 interface_opts.nocap_rpcap = device.remote_opts.remote_host_opts.nocap_rpcap;
1072 interface_opts.nocap_local = device.remote_opts.remote_host_opts.nocap_local;
1074 #ifdef HAVE_PCAP_SETSAMPLING
1075 interface_opts.sampling_method = device.remote_opts.sampling_method;
1076 interface_opts.sampling_param = device.remote_opts.sampling_param;
1078 g_array_append_val(capture_opts->ifaces, interface_opts);
1086 #endif /* HAVE_LIBPCAP */