2 * Routines for packet capture
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
43 #ifdef HAVE_SYS_TYPES_H
44 #include <sys/types.h>
47 #ifdef HAVE_NETINET_IN_H
48 #include <netinet/in.h>
55 #ifdef HAVE_ARPA_INET_H
56 #include <arpa/inet.h>
59 #ifdef HAVE_SYS_SOCKET_H
60 #include <sys/socket.h> /* needed to define AF_ values on UNIX */
63 #ifdef HAVE_WINSOCK2_H
64 #include <winsock2.h> /* needed to define AF_ values on Windows */
67 #ifdef NEED_INET_V6DEFS_H
68 # include "inet_v6defs.h"
76 #include <epan/packet.h>
77 #include <epan/dfilter/dfilter.h>
80 #include "capture_sync.h"
81 #include "capture_info.h"
82 #include "capture_ui_utils.h"
84 #include "capture-pcap-util.h"
85 #include "alert_box.h"
86 #include "simple_dialog.h"
87 #include <epan/prefs.h>
90 #include "capture-wpcap.h"
93 #include "wsutil/file_util.h"
96 typedef struct if_stat_cache_item_s {
99 } if_stat_cache_item_t;
101 struct if_stat_cache_s {
104 GList *cache_list; /* List of if_stat_chache_entry_t */
107 /* this callback mechanism should possibly be replaced by the g_signal_...() stuff (if I only would know how :-) */
109 capture_callback_t cb_fct;
111 } capture_callback_data_t;
113 static GList *capture_callbacks = NULL;
116 capture_callback_invoke(int event, capture_options *capture_opts)
118 capture_callback_data_t *cb;
119 GList *cb_item = capture_callbacks;
121 /* there should be at least one interested */
122 g_assert(cb_item != NULL);
124 while(cb_item != NULL) {
126 cb->cb_fct(event, capture_opts, cb->user_data);
127 cb_item = g_list_next(cb_item);
133 capture_callback_add(capture_callback_t func, gpointer user_data)
135 capture_callback_data_t *cb;
137 cb = g_malloc(sizeof(capture_callback_data_t));
139 cb->user_data = user_data;
141 capture_callbacks = g_list_append(capture_callbacks, cb);
145 capture_callback_remove(capture_callback_t func)
147 capture_callback_data_t *cb;
148 GList *cb_item = capture_callbacks;
150 while(cb_item != NULL) {
152 if(cb->cb_fct == func) {
153 capture_callbacks = g_list_remove(capture_callbacks, cb);
157 cb_item = g_list_next(cb_item);
160 g_assert_not_reached();
166 * @return TRUE if the capture starts successfully, FALSE otherwise.
169 capture_start(capture_options *capture_opts)
174 /* close the currently loaded capture file */
175 cf_close(capture_opts->cf);
177 g_assert(capture_opts->state == CAPTURE_STOPPED);
178 capture_opts->state = CAPTURE_PREPARING;
180 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Start ...");
182 /* try to start the capture child process */
183 ret = sync_pipe_start(capture_opts);
185 if(capture_opts->save_file != NULL) {
186 g_free(capture_opts->save_file);
187 capture_opts->save_file = NULL;
190 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Start failed!");
191 capture_opts->state = CAPTURE_STOPPED;
193 /* the capture child might not respond shortly after bringing it up */
194 /* (for example: it will block if no input arrives from an input capture pipe (e.g. mkfifo)) */
196 /* to prevent problems, bring the main GUI into "capture mode" right after a successful */
197 /* spawn/exec of the capture child, without waiting for any response from it */
198 capture_callback_invoke(capture_cb_capture_prepared, capture_opts);
200 if(capture_opts->show_info)
201 capture_info_open(capture_opts);
209 capture_stop(capture_options *capture_opts)
211 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Stop ...");
213 capture_callback_invoke(capture_cb_capture_stopping, capture_opts);
215 /* stop the capture child gracefully */
216 sync_pipe_stop(capture_opts);
221 capture_restart(capture_options *capture_opts)
223 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Restart");
225 capture_opts->restart = TRUE;
226 capture_stop(capture_opts);
231 capture_kill_child(capture_options *capture_opts)
233 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "Capture Kill");
235 /* kill the capture child */
236 sync_pipe_kill(capture_opts->fork_child);
241 /* We've succeeded in doing a (non real-time) capture; try to read it into a new capture file */
243 capture_input_read_all(capture_options *capture_opts, gboolean is_tempfile, gboolean drops_known,
249 /* Capture succeeded; attempt to open the capture file. */
250 if (cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err) != CF_OK) {
251 /* We're not doing a capture any more, so we don't have a save file. */
255 /* Set the read filter to NULL. */
256 /* XXX - this is odd here; try to put it somewhere where it fits better */
257 cf_set_rfcode(capture_opts->cf, NULL);
259 /* Get the packet-drop statistics.
261 XXX - there are currently no packet-drop statistics stored
262 in libpcap captures, and that's what we're reading.
264 At some point, we will add support in Wiretap to return
265 packet-drop statistics for capture file formats that store it,
266 and will make "cf_read()" get those statistics from Wiretap.
267 We clear the statistics (marking them as "not known") in
268 "cf_open()", and "cf_read()" will only fetch them and mark
269 them as known if Wiretap supplies them, so if we get the
270 statistics now, after calling "cf_open()" but before calling
271 "cf_read()", the values we store will be used by "cf_read()".
273 If a future libpcap capture file format stores the statistics,
274 we'll put them into the capture file that we write, and will
275 thus not have to set them here - "cf_read()" will get them from
276 the file and use them. */
278 cf_set_drops_known(capture_opts->cf, TRUE);
280 /* XXX - on some systems, libpcap doesn't bother filling in
281 "ps_ifdrop" - it doesn't even set it to zero - so we don't
282 bother looking at it.
284 Ideally, libpcap would have an interface that gave us
285 several statistics - perhaps including various interface
286 error statistics - and would tell us which of them it
287 supplies, allowing us to display only the ones it does. */
288 cf_set_drops(capture_opts->cf, drops);
291 /* read in the packet data */
292 switch (cf_read(capture_opts->cf)) {
296 /* Just because we got an error, that doesn't mean we were unable
297 to read any of the file; we handle what we could get from the
301 case CF_READ_ABORTED:
302 /* User wants to quit program. Exit by leaving the main loop,
303 so that any quit functions we registered get called. */
304 main_window_nested_quit();
308 /* if we didn't capture even a single packet, close the file again */
309 if(cf_get_packet_count(capture_opts->cf) == 0 && !capture_opts->restart) {
310 simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
311 "%sNo packets captured!%s\n"
313 "As no data was captured, closing the %scapture file!\n"
316 "Help about capturing can be found at:\n"
318 " http://wiki.wireshark.org/CaptureSetup"
321 "Wireless (Wi-Fi/WLAN):\n"
322 "Try to switch off promiscuous mode in the Capture Options!"
325 simple_dialog_primary_start(), simple_dialog_primary_end(),
326 (cf_is_tempfile(capture_opts->cf)) ? "temporary " : "");
327 cf_close(capture_opts->cf);
333 /* capture child tells us we have a new (or the first) capture file */
335 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
337 gboolean is_tempfile;
341 if(capture_opts->state == CAPTURE_PREPARING) {
342 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
344 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
346 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
348 /* free the old filename */
349 if(capture_opts->save_file != NULL) {
350 /* we start a new capture file, close the old one (if we had one before). */
351 /* (we can only have an open capture file in real_time_mode!) */
352 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
353 capture_callback_invoke(capture_cb_capture_update_finished, capture_opts);
354 cf_finish_tail(capture_opts->cf, &err);
355 cf_close(capture_opts->cf);
357 g_free(capture_opts->save_file);
359 cf_set_tempfile(capture_opts->cf, FALSE);
361 /* we didn't have a save_file before; must be a tempfile */
363 cf_set_tempfile(capture_opts->cf, TRUE);
366 /* save the new filename */
367 capture_opts->save_file = g_strdup(new_file);
369 /* if we are in real-time mode, open the new file now */
370 if(capture_opts->real_time_mode) {
371 /* Attempt to open the capture file and set up to read from it. */
372 switch(cf_start_tail(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
376 /* Don't unlink (delete) the save file - leave it around,
377 for debugging purposes. */
378 g_free(capture_opts->save_file);
379 capture_opts->save_file = NULL;
384 if(capture_opts->show_info) {
385 if (!capture_info_new_file(new_file))
389 if(capture_opts->real_time_mode) {
390 capture_callback_invoke(capture_cb_capture_update_started, capture_opts);
392 capture_callback_invoke(capture_cb_capture_fixed_started, capture_opts);
394 capture_opts->state = CAPTURE_RUNNING;
400 /* capture child tells us we have new packets to read */
402 capture_input_new_packets(capture_options *capture_opts, int to_read)
407 g_assert(capture_opts->save_file);
409 if(capture_opts->real_time_mode) {
410 /* Read from the capture file the number of records the child told us it added. */
411 switch (cf_continue_tail(capture_opts->cf, to_read, &err)) {
415 /* Just because we got an error, that doesn't mean we were unable
416 to read any of the file; we handle what we could get from the
419 XXX - abort on a read error? */
420 capture_callback_invoke(capture_cb_capture_update_continue, capture_opts);
423 case CF_READ_ABORTED:
424 /* Kill the child capture process; the user wants to exit, and we
425 shouldn't just leave it running. */
426 capture_kill_child(capture_opts);
430 /* increase the capture file packet counter by the number of incoming packets */
431 cf_set_packet_count(capture_opts->cf,
432 cf_get_packet_count(capture_opts->cf) + to_read);
434 capture_callback_invoke(capture_cb_capture_fixed_continue, capture_opts);
437 /* update the main window so we get events (e.g. from the stop toolbar button) */
438 main_window_update();
440 if(capture_opts->show_info)
441 capture_info_new_packets(to_read);
445 /* Capture child told us how many dropped packets it counted.
448 capture_input_drops(capture_options *capture_opts, guint32 dropped)
450 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "%u packet%s dropped", dropped, plurality(dropped, "", "s"));
452 g_assert(capture_opts->state == CAPTURE_RUNNING);
454 cf_set_drops_known(capture_opts->cf, TRUE);
455 cf_set_drops(capture_opts->cf, dropped);
459 /* Capture child told us that an error has occurred while starting/running
461 The buffer we're handed has *two* null-terminated strings in it - a
462 primary message and a secondary message, one right after the other.
463 The secondary message might be a null string.
466 capture_input_error_message(capture_options *capture_opts, char *error_msg, char *secondary_error_msg)
468 gchar *safe_error_msg;
469 gchar *safe_secondary_error_msg;
471 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Error message from child: \"%s\", \"%s\"",
472 error_msg, secondary_error_msg);
474 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
476 safe_error_msg = simple_dialog_format_message(error_msg);
477 if (*secondary_error_msg != '\0') {
478 /* We have both primary and secondary messages. */
479 safe_secondary_error_msg = simple_dialog_format_message(secondary_error_msg);
480 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s%s%s\n\n%s",
481 simple_dialog_primary_start(), safe_error_msg,
482 simple_dialog_primary_end(), safe_secondary_error_msg);
483 g_free(safe_secondary_error_msg);
485 /* We have only a primary message. */
486 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s%s%s",
487 simple_dialog_primary_start(), safe_error_msg,
488 simple_dialog_primary_end());
490 g_free(safe_error_msg);
492 /* the capture child will close the sync_pipe if required, nothing to do for now */
497 /* Capture child told us that an error has occurred while parsing a
498 capture filter when starting/running the capture.
501 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
503 dfilter_t *rfcode = NULL;
504 gchar *safe_cfilter = simple_dialog_format_message(capture_opts->cfilter);
505 gchar *safe_cfilter_error_msg = simple_dialog_format_message(error_message);
507 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture filter error message from child: \"%s\"", error_message);
509 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
511 /* Did the user try a display filter? */
512 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
513 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
514 "%sInvalid capture filter: \"%s\"!%s\n"
516 "That string looks like a valid display filter; however, it isn't a valid\n"
517 "capture filter (%s).\n"
519 "Note that display filters and capture filters don't have the same syntax,\n"
520 "so you can't use most display filter expressions as capture filters.\n"
522 "See the User's Guide for a description of the capture filter syntax.",
523 simple_dialog_primary_start(), safe_cfilter,
524 simple_dialog_primary_end(), safe_cfilter_error_msg);
525 dfilter_free(rfcode);
527 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
528 "%sInvalid capture filter: \"%s\"!%s\n"
530 "That string isn't a valid capture filter (%s).\n"
531 "See the User's Guide for a description of the capture filter syntax.",
532 simple_dialog_primary_start(), safe_cfilter,
533 simple_dialog_primary_end(), safe_cfilter_error_msg);
535 g_free(safe_cfilter_error_msg);
536 g_free(safe_cfilter);
538 /* the capture child will close the sync_pipe if required, nothing to do for now */
542 /* capture child closed its side of the pipe, do the required cleanup */
544 capture_input_closed(capture_options *capture_opts)
547 int packet_count_save;
549 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture stopped!");
550 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
552 /* if we didn't start the capture, do a fake start. */
553 /* (happens if we got an error message - we won't get a filename then). */
554 if(capture_opts->state == CAPTURE_PREPARING) {
555 if(capture_opts->real_time_mode) {
556 capture_callback_invoke(capture_cb_capture_update_started, capture_opts);
558 capture_callback_invoke(capture_cb_capture_fixed_started, capture_opts);
562 if(capture_opts->real_time_mode) {
563 cf_read_status_t status;
565 /* Read what remains of the capture file. */
566 status = cf_finish_tail(capture_opts->cf, &err);
568 /* XXX: If -Q (quit-after-cap) then cf->count clr'd below so save it first */
569 packet_count_save = cf_get_packet_count(capture_opts->cf);
570 /* Tell the GUI we are not doing a capture any more.
571 Must be done after the cf_finish_tail(), so file lengths are
572 correctly displayed */
573 capture_callback_invoke(capture_cb_capture_update_finished, capture_opts);
575 /* Finish the capture. */
579 if ((packet_count_save == 0) && !capture_opts->restart) {
580 simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
581 "%sNo packets captured!%s\n"
583 "As no data was captured, closing the %scapture file!\n"
586 "Help about capturing can be found at:\n"
588 " http://wiki.wireshark.org/CaptureSetup"
591 "Wireless (Wi-Fi/WLAN):\n"
592 "Try to switch off promiscuous mode in the Capture Options!"
595 simple_dialog_primary_start(), simple_dialog_primary_end(),
596 cf_is_tempfile(capture_opts->cf) ? "temporary " : "");
597 cf_close(capture_opts->cf);
601 /* Just because we got an error, that doesn't mean we were unable
602 to read any of the file; we handle what we could get from the
606 case CF_READ_ABORTED:
607 /* Exit by leaving the main loop, so that any quit functions
608 we registered get called. */
613 /* first of all, we are not doing a capture any more */
614 capture_callback_invoke(capture_cb_capture_fixed_finished, capture_opts);
616 /* this is a normal mode capture and if no error happened, read in the capture file data */
617 if(capture_opts->save_file != NULL) {
618 capture_input_read_all(capture_opts, cf_is_tempfile(capture_opts->cf),
619 cf_get_drops_known(capture_opts->cf), cf_get_drops(capture_opts->cf));
623 if(capture_opts->show_info)
624 capture_info_close();
626 capture_opts->state = CAPTURE_STOPPED;
628 /* if we couldn't open a capture file, there's nothing more for us to do */
629 if(capture_opts->save_file == NULL) {
630 cf_close(capture_opts->cf);
634 /* does the user wants to restart the current capture? */
635 if(capture_opts->restart) {
636 capture_opts->restart = FALSE;
638 ws_unlink(capture_opts->save_file);
640 /* if it was a tempfile, throw away the old filename (so it will become a tempfile again) */
641 if(cf_is_tempfile(capture_opts->cf)) {
642 g_free(capture_opts->save_file);
643 capture_opts->save_file = NULL;
646 /* ... and start the capture again */
647 capture_start(capture_opts);
649 /* We're not doing a capture any more, so we don't have a save file. */
650 g_free(capture_opts->save_file);
651 capture_opts->save_file = NULL;
656 * Fetch the interface list from a child process (dumpcap).
658 * @return A GList containing if_info_t structs if successful, NULL (with err and possibly err_str set) otherwise.
662 /* XXX - We parse simple text output to get our interface list. Should
663 * we use "real" data serialization instead, e.g. via XML? */
665 capture_interface_list(int *err, char **err_str)
667 GList *if_list = NULL;
670 gchar **raw_list, **if_parts, **addr_parts;
675 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
677 /* Try to get our interface list */
678 *err = sync_interface_list_open(&msg);
680 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
689 /* Split our lines */
691 raw_list = g_strsplit(msg, "\r\n", 0);
693 raw_list = g_strsplit(msg, "\n", 0);
697 for (i = 0; raw_list[i] != NULL; i++) {
698 if_parts = g_strsplit(raw_list[i], "\t", 4);
699 if (if_parts[0] == NULL || if_parts[1] == NULL || if_parts[2] == NULL ||
700 if_parts[3] == NULL) {
701 g_strfreev(if_parts);
705 /* Number followed by the name, e.g "1. eth0" */
706 name = strchr(if_parts[0], ' ');
710 g_strfreev(if_parts);
714 if_info = g_malloc0(sizeof(if_info_t));
715 if_info->name = g_strdup(name);
716 if (strlen(if_parts[1]) > 0)
717 if_info->description = g_strdup(if_parts[1]);
718 addr_parts = g_strsplit(if_parts[2], ",", 0);
719 for (j = 0; addr_parts[j] != NULL; j++) {
720 if_addr = g_malloc0(sizeof(if_addr_t));
721 if (inet_pton(AF_INET, addr_parts[j], &if_addr->ip_addr.ip4_addr)) {
722 if_addr->type = AT_IPv4;
723 } else if (inet_pton(AF_INET6, addr_parts[j],
724 &if_addr->ip_addr.ip6_addr)) {
725 if_addr->type = AT_IPv6;
731 if_info->ip_addr = g_slist_append(if_info->ip_addr, if_addr);
734 if (strcmp(if_parts[3], "loopback") == 0)
735 if_info->loopback = TRUE;
736 g_strfreev(if_parts);
737 g_strfreev(addr_parts);
738 if_list = g_list_append(if_list, if_info);
740 g_strfreev(raw_list);
742 /* Check to see if we built a list */
743 if (if_list == NULL) {
744 *err = NO_INTERFACES_FOUND;
746 *err_str = g_strdup("No interfaces found");
751 /* XXX - We parse simple text output to get our interface list. Should
752 * we use "real" data serialization instead, e.g. via XML? */
754 capture_pcap_linktype_list(const gchar *ifname, char **err_str)
756 GList *linktype_list = NULL;
759 gchar **raw_list, **lt_parts;
760 data_link_info_t *data_link_info;
762 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
764 /* Try to get our interface list */
765 err = sync_linktype_list_open(ifname, &msg);
767 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
776 /* Split our lines */
778 raw_list = g_strsplit(msg, "\r\n", 0);
780 raw_list = g_strsplit(msg, "\n", 0);
784 for (i = 0; raw_list[i] != NULL; i++) {
785 /* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
786 lt_parts = g_strsplit(raw_list[i], "\t", 3);
787 if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
788 g_strfreev(lt_parts);
792 data_link_info = g_malloc(sizeof (data_link_info_t));
793 data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
794 data_link_info->name = g_strdup(lt_parts[1]);
795 if (strcmp(lt_parts[2], "(not supported)") != 0)
796 data_link_info->description = g_strdup(lt_parts[2]);
798 data_link_info->description = NULL;
800 linktype_list = g_list_append(linktype_list, data_link_info);
802 g_strfreev(raw_list);
804 /* Check to see if we built a list */
805 if (linktype_list == NULL) {
809 return linktype_list;
813 capture_stat_start(GList *if_list) {
814 int stat_fd, fork_child;
816 if_stat_cache_t *sc = NULL;
819 if_stat_cache_item_t *sc_item;
821 /* Fire up dumpcap. */
823 * XXX - on systems with BPF, the number of BPF devices limits the
824 * number of devices on which you can capture simultaneously.
828 * 1) this might fail if you run out of BPF devices
832 * 2) opening every interface could leave too few BPF devices
833 * for *other* programs.
835 * It also means the system could end up getting a lot of traffic
836 * that it has to pass through the networking stack and capture
837 * mechanism, so opening all the devices and presenting packet
838 * counts might not always be a good idea.
840 if (sync_interface_stats_open(&stat_fd, &fork_child, &msg) == 0) {
841 sc = g_malloc(sizeof(if_stat_cache_t));
842 sc->stat_fd = stat_fd;
843 sc->fork_child = fork_child;
844 sc->cache_list = NULL;
846 /* Initialize the cache */
847 for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
848 if_info = if_entry->data;
849 sc_item = g_malloc0(sizeof(if_stat_cache_item_t));
850 sc_item->name = g_strdup(if_info->name);
851 sc->cache_list = g_list_append(sc->cache_list, sc_item);
857 #define MAX_STAT_LINE_LEN 500
860 capture_stat_cache_update(if_stat_cache_t *sc) {
861 gchar stat_line[MAX_STAT_LINE_LEN];
864 if_stat_cache_item_t *sc_item;
869 while (sync_pipe_gets_nonblock(sc->stat_fd, stat_line, MAX_STAT_LINE_LEN) > 0) {
870 g_strstrip(stat_line);
871 stat_parts = g_strsplit(stat_line, "\t", 3);
872 if (stat_parts[0] == NULL || stat_parts[1] == NULL ||
873 stat_parts[2] == NULL) {
874 g_strfreev(stat_parts);
877 for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
878 sc_item = sc_entry->data;
879 if (strcmp(sc_item->name, stat_parts[0]) == 0) {
880 sc_item->ps.ps_recv = (u_int) strtoul(stat_parts[1], NULL, 10);
881 sc_item->ps.ps_drop = (u_int) strtoul(stat_parts[2], NULL, 10);
884 g_strfreev(stat_parts);
889 capture_stats(if_stat_cache_t *sc, char *ifname, struct pcap_stat *ps) {
891 if_stat_cache_item_t *sc_item;
893 if (!sc || !ifname || !ps) {
897 capture_stat_cache_update(sc);
898 for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
899 sc_item = sc_entry->data;
900 if (strcmp(sc_item->name, ifname) == 0) {
901 memcpy(ps, &sc_item->ps, sizeof(struct pcap_stat));
909 capture_stat_stop(if_stat_cache_t *sc) {
911 if_stat_cache_item_t *sc_item;
917 sync_interface_stats_close(&sc->stat_fd, &sc->fork_child, &msg);
919 for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
920 sc_item = sc_entry->data;
921 g_free(sc_item->name);
927 #endif /* HAVE_LIBPCAP */