*
* $Id$
*
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
#include <unistd.h>
#endif
-#include <stdlib.h>
+#include <stdio.h>
#include <string.h>
-#include <ctype.h>
-
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#include <signal.h>
-#include <errno.h>
-
-#include <pcap.h>
#include <glib.h>
#include <epan/dfilter/dfilter.h>
#include "file.h"
#include "capture.h"
+#include "capture_ifinfo.h"
#include "capture_sync.h"
+#include "capture_info.h"
#include "capture_ui_utils.h"
#include "util.h"
-#include "pcap-util.h"
-#include "alert_box.h"
-#include "simple_dialog.h"
+#include "capture-pcap-util.h"
#include <epan/prefs.h>
-#include "conditions.h"
-#include "ringbuffer.h"
#ifdef _WIN32
#include "capture-wpcap.h"
#endif
-#include "ui_util.h"
-#include "file_util.h"
+
+#include "ui/simple_dialog.h"
+#include "ui/ui_util.h"
+
+#include "wsutil/file_util.h"
#include "log.h"
+typedef struct if_stat_cache_item_s {
+ char *name;
+ struct pcap_stat ps;
+} if_stat_cache_item_t;
+
+struct if_stat_cache_s {
+ int stat_fd;
+ int fork_child;
+ GList *cache_list; /* List of if_stat_chache_entry_t */
+};
+
+/* this callback mechanism should possibly be replaced by the g_signal_...() stuff (if I only would know how :-) */
+typedef struct {
+ capture_callback_t cb_fct;
+ gpointer user_data;
+} capture_callback_data_t;
+
+static GList *capture_callbacks = NULL;
+
+static void
+capture_callback_invoke(int event, capture_options *capture_opts)
+{
+ capture_callback_data_t *cb;
+ GList *cb_item = capture_callbacks;
+
+ /* there should be at least one interested */
+ g_assert(cb_item != NULL);
+
+ while(cb_item != NULL) {
+ cb = cb_item->data;
+ cb->cb_fct(event, capture_opts, cb->user_data);
+ cb_item = g_list_next(cb_item);
+ }
+}
+
+
+void
+capture_callback_add(capture_callback_t func, gpointer user_data)
+{
+ capture_callback_data_t *cb;
+ cb = g_malloc(sizeof(capture_callback_data_t));
+ cb->cb_fct = func;
+ cb->user_data = user_data;
-/**
+ capture_callbacks = g_list_append(capture_callbacks, cb);
+}
+
+void
+capture_callback_remove(capture_callback_t func)
+{
+ capture_callback_data_t *cb;
+ GList *cb_item = capture_callbacks;
+
+ while(cb_item != NULL) {
+ cb = cb_item->data;
+ if(cb->cb_fct == func) {
+ capture_callbacks = g_list_remove(capture_callbacks, cb);
+ g_free(cb);
+ return;
+ }
+ cb_item = g_list_next(cb_item);
+ }
+
+ g_assert_not_reached();
+}
+
+/**
* Start a capture.
*
* @return TRUE if the capture starts successfully, FALSE otherwise.
capture_start(capture_options *capture_opts)
{
gboolean ret;
+ guint i;
+ GString *source = g_string_new("");
+ if (capture_opts->state != CAPTURE_STOPPED)
+ return FALSE;
+ capture_opts->state = CAPTURE_PREPARING;
/* close the currently loaded capture file */
cf_close(capture_opts->cf);
-
- g_assert(capture_opts->state == CAPTURE_STOPPED);
- capture_opts->state = CAPTURE_PREPARING;
-
+ collect_ifaces(capture_opts);
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Start ...");
-
+#ifdef _WIN32
+ if (capture_opts->ifaces->len < 2) {
+#else
+ if (capture_opts->ifaces->len < 4) {
+#endif
+ for (i = 0; i < capture_opts->ifaces->len; i++) {
+ interface_options interface_opts;
+
+ interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
+ if (i > 0) {
+ if (capture_opts->ifaces->len > 2) {
+ g_string_append_printf(source, ",");
+ }
+ g_string_append_printf(source, " ");
+ if (i == capture_opts->ifaces->len - 1) {
+ g_string_append_printf(source, "and ");
+ }
+ }
+ g_string_append_printf(source, "%s", get_iface_description_for_interface(capture_opts, i));
+ if ((interface_opts.cfilter != NULL) &&
+ (strlen(interface_opts.cfilter) > 0)) {
+ g_string_append_printf(source, " (%s)", interface_opts.cfilter);
+ }
+ }
+ } else {
+ g_string_append_printf(source, "%u interfaces", capture_opts->ifaces->len);
+ }
+ cf_set_tempfile_source(capture_opts->cf, source->str);
+ g_string_free(source, TRUE);
/* try to start the capture child process */
ret = sync_pipe_start(capture_opts);
if(!ret) {
capture_opts->save_file = NULL;
}
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Start failed!");
capture_opts->state = CAPTURE_STOPPED;
} else {
/* the capture child might not respond shortly after bringing it up */
- /* (especially it will block, if no input coming from an input capture pipe (e.g. mkfifo) is coming in) */
+ /* (for example: it will block if no input arrives from an input capture pipe (e.g. mkfifo)) */
+
+ /* to prevent problems, bring the main GUI into "capture mode" right after a successful */
+ /* spawn/exec of the capture child, without waiting for any response from it */
+ capture_callback_invoke(capture_cb_capture_prepared, capture_opts);
- /* to prevent problems, bring the main GUI into "capture mode" right after successfully */
- /* spawn/exec the capture child, without waiting for any response from it */
- cf_callback_invoke(cf_cb_live_capture_prepared, capture_opts);
+ if(capture_opts->show_info)
+ capture_info_open(capture_opts);
}
return ret;
{
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Stop ...");
- cf_callback_invoke(cf_cb_live_capture_stopping, capture_opts);
+ capture_callback_invoke(capture_cb_capture_stopping, capture_opts);
/* stop the capture child gracefully */
sync_pipe_stop(capture_opts);
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "Capture Kill");
/* kill the capture child */
- sync_pipe_kill(capture_opts);
+ sync_pipe_kill(capture_opts->fork_child);
}
-/* We've succeeded a (non real-time) capture, try to read it into a new capture file */
+/* We've succeeded in doing a (non real-time) capture; try to read it into a new capture file */
static gboolean
capture_input_read_all(capture_options *capture_opts, gboolean is_tempfile, gboolean drops_known,
guint32 drops)
{
int err;
-
/* Capture succeeded; attempt to open the capture file. */
if (cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err) != CF_OK) {
- /* We're not doing a capture any more, so we don't have a save
- file. */
+ /* We're not doing a capture any more, so we don't have a save file. */
return FALSE;
}
-
+
/* Set the read filter to NULL. */
- /* XXX - this is odd here, try to put it somewhere, where it fits better */
+ /* XXX - this is odd here; try to put it somewhere where it fits better */
cf_set_rfcode(capture_opts->cf, NULL);
/* Get the packet-drop statistics.
}
/* read in the packet data */
- switch (cf_read(capture_opts->cf)) {
+ switch (cf_read(capture_opts->cf, FALSE)) {
case CF_READ_OK:
case CF_READ_ERROR:
break;
case CF_READ_ABORTED:
- /* User wants to quit program. Exit by leaving the main loop,
+ /* User wants to quit program. Exit by leaving the main loop,
so that any quit functions we registered get called. */
main_window_nested_quit();
return FALSE;
}
- /* if we didn't captured even a single packet, close the file again */
- if(cf_packet_count(capture_opts->cf) == 0 && !capture_opts->restart) {
- simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+ /* if we didn't capture even a single packet, close the file again */
+ if(cf_get_packet_count(capture_opts->cf) == 0 && !capture_opts->restart) {
+ simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
"%sNo packets captured!%s\n"
"\n"
"As no data was captured, closing the %scapture file!\n"
"\n"
"Help about capturing can be found at:\n"
"\n"
-" http://wiki.ethereal.com/CaptureSetup"
+" http://wiki.wireshark.org/CaptureSetup"
#ifdef _WIN32
"\n\n"
"Wireless (Wi-Fi/WLAN):\n"
}
-/* capture child tells us, we have a new (or the first) capture file */
+/* capture child tells us we have a new (or the first) capture file */
gboolean
capture_input_new_file(capture_options *capture_opts, gchar *new_file)
{
gboolean is_tempfile;
int err;
-
if(capture_opts->state == CAPTURE_PREPARING) {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
}
/* free the old filename */
if(capture_opts->save_file != NULL) {
- /* we start a new capture file, close the old one (if we had one before) */
+ /* we start a new capture file, close the old one (if we had one before). */
/* (we can only have an open capture file in real_time_mode!) */
if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
- cf_callback_invoke(cf_cb_live_capture_update_finished, capture_opts->cf);
+ capture_callback_invoke(capture_cb_capture_update_finished, capture_opts);
cf_finish_tail(capture_opts->cf, &err);
cf_close(capture_opts->cf);
}
is_tempfile = FALSE;
cf_set_tempfile(capture_opts->cf, FALSE);
} else {
- /* we didn't had a save_file before, must be a tempfile */
+ /* we didn't have a save_file before; must be a tempfile */
is_tempfile = TRUE;
cf_set_tempfile(capture_opts->cf, TRUE);
}
/* if we are in real-time mode, open the new file now */
if(capture_opts->real_time_mode) {
/* Attempt to open the capture file and set up to read from it. */
- switch(cf_start_tail(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
+ switch(cf_start_tail(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
case CF_OK:
break;
case CF_ERROR:
- /* Don't unlink (delete) the save file - leave it around,
+ /* Don't unlink (delete) the save file - leave it around,
for debugging purposes. */
g_free(capture_opts->save_file);
capture_opts->save_file = NULL;
return FALSE;
- break;
}
+ }
- cf_callback_invoke(cf_cb_live_capture_update_started, capture_opts);
- } else {
- cf_callback_invoke(cf_cb_live_capture_fixed_started, capture_opts);
+ if(capture_opts->show_info) {
+ if (!capture_info_new_file(new_file))
+ return FALSE;
}
+ if(capture_opts->real_time_mode) {
+ capture_callback_invoke(capture_cb_capture_update_started, capture_opts);
+ } else {
+ capture_callback_invoke(capture_cb_capture_fixed_started, capture_opts);
+ }
capture_opts->state = CAPTURE_RUNNING;
return TRUE;
}
-
-/* capture child tells us, we have new packets to read */
+
+/* capture child tells us we have new packets to read */
void
capture_input_new_packets(capture_options *capture_opts, int to_read)
{
file.
XXX - abort on a read error? */
- cf_callback_invoke(cf_cb_live_capture_update_continue, capture_opts->cf);
- /* update the main window, so we get events (e.g. from the stop toolbar button) */
- main_window_update();
+ capture_callback_invoke(capture_cb_capture_update_continue, capture_opts);
break;
case CF_READ_ABORTED:
capture_kill_child(capture_opts);
break;
}
+ } else {
+ /* increase the capture file packet counter by the number of incoming packets */
+ cf_set_packet_count(capture_opts->cf,
+ cf_get_packet_count(capture_opts->cf) + to_read);
+ cf_fake_continue_tail(capture_opts->cf);
+
+ capture_callback_invoke(capture_cb_capture_fixed_continue, capture_opts);
}
+
+ /* update the main window so we get events (e.g. from the stop toolbar button) */
+ main_window_update();
+
+ if(capture_opts->show_info)
+ capture_info_new_packets(to_read);
}
-/* Capture child told us, how many dropped packets it counted.
+/* Capture child told us how many dropped packets it counted.
*/
void
-capture_input_drops(capture_options *capture_opts, int dropped)
+capture_input_drops(capture_options *capture_opts, guint32 dropped)
{
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "%d packet%s dropped", dropped, plurality(dropped, "", "s"));
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "%u packet%s dropped", dropped, plurality(dropped, "", "s"));
g_assert(capture_opts->state == CAPTURE_RUNNING);
}
-/* Capture child told us, that an error has occurred while starting the capture. */
+/* Capture child told us that an error has occurred while starting/running
+ the capture.
+ The buffer we're handed has *two* null-terminated strings in it - a
+ primary message and a secondary message, one right after the other.
+ The secondary message might be a null string.
+ */
void
-capture_input_error_message(capture_options *capture_opts, char *error_message)
+capture_input_error_message(capture_options *capture_opts, char *error_msg, char *secondary_error_msg)
{
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Error message from child: \"%s\"", error_message);
+ gchar *safe_error_msg;
+ gchar *safe_secondary_error_msg;
- g_assert(capture_opts->state == CAPTURE_PREPARING);
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Error message from child: \"%s\", \"%s\"",
+ error_msg, secondary_error_msg);
- simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s", error_message);
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
- /* the capture child will close the sync_pipe, nothing to do for now */
+ safe_error_msg = simple_dialog_format_message(error_msg);
+ if (*secondary_error_msg != '\0') {
+ /* We have both primary and secondary messages. */
+ safe_secondary_error_msg = simple_dialog_format_message(secondary_error_msg);
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s%s%s\n\n%s",
+ simple_dialog_primary_start(), safe_error_msg,
+ simple_dialog_primary_end(), safe_secondary_error_msg);
+ g_free(safe_secondary_error_msg);
+ } else {
+ /* We have only a primary message. */
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s%s%s",
+ simple_dialog_primary_start(), safe_error_msg,
+ simple_dialog_primary_end());
+ }
+ g_free(safe_error_msg);
+
+ /* the capture child will close the sync_pipe if required, nothing to do for now */
}
-/* capture child closed it's side ot the pipe, do the required cleanup */
+
+/* Capture child told us that an error has occurred while parsing a
+ capture filter when starting/running the capture.
+ */
void
-capture_input_closed(capture_options *capture_opts)
+capture_input_cfilter_error_message(capture_options *capture_opts, guint i, char *error_message)
{
- int err;
+ dfilter_t *rfcode = NULL;
+ gchar *safe_cfilter;
+ gchar *safe_descr;
+ gchar *safe_cfilter_error_msg;
+ interface_options interface_opts;
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture filter error message from child: \"%s\"", error_message);
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture stopped!");
- g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
+ g_assert(i < capture_opts->ifaces->len);
+
+ interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
+ safe_cfilter = simple_dialog_format_message(interface_opts.cfilter);
+ safe_descr = simple_dialog_format_message(interface_opts.descr);
+ safe_cfilter_error_msg = simple_dialog_format_message(error_message);
+ /* Did the user try a display filter? */
+ if (dfilter_compile(interface_opts.cfilter, &rfcode) && rfcode != NULL) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "%sInvalid capture filter \"%s\" for interface %s!%s\n"
+ "\n"
+ "That string looks like a valid display filter; however, it isn't a valid\n"
+ "capture filter (%s).\n"
+ "\n"
+ "Note that display filters and capture filters don't have the same syntax,\n"
+ "so you can't use most display filter expressions as capture filters.\n"
+ "\n"
+ "See the User's Guide for a description of the capture filter syntax.",
+ simple_dialog_primary_start(), safe_cfilter, safe_descr,
+ simple_dialog_primary_end(), safe_cfilter_error_msg);
+ dfilter_free(rfcode);
+ } else {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "%sInvalid capture filter \"%s\" for interface %s!%s\n"
+ "\n"
+ "That string isn't a valid capture filter (%s).\n"
+ "See the User's Guide for a description of the capture filter syntax.",
+ simple_dialog_primary_start(), safe_cfilter, safe_descr,
+ simple_dialog_primary_end(), safe_cfilter_error_msg);
+ }
+ g_free(safe_cfilter_error_msg);
+ g_free(safe_descr);
+ g_free(safe_cfilter);
- /* if we didn't started the capture (happens if an error occured), do a fake start */
- if(capture_opts->state == CAPTURE_PREPARING) {
- if(capture_opts->real_time_mode) {
- cf_callback_invoke(cf_cb_live_capture_update_started, capture_opts);
- } else {
- cf_callback_invoke(cf_cb_live_capture_fixed_started, capture_opts);
- }
- }
+ /* the capture child will close the sync_pipe if required, nothing to do for now */
+}
+
+
+/* capture child closed its side of the pipe, do the required cleanup */
+void
+capture_input_closed(capture_options *capture_opts, gchar *msg)
+{
+ int err;
+ int packet_count_save;
+
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture stopped!");
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
+
+ if (msg != NULL)
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s", msg);
+ /* if we didn't start the capture, do a fake start. */
+ /* (happens if we got an error message - we won't get a filename then). */
+ if(capture_opts->state == CAPTURE_PREPARING) {
if(capture_opts->real_time_mode) {
- cf_read_status_t status;
+ capture_callback_invoke(capture_cb_capture_update_started, capture_opts);
+ } else {
+ capture_callback_invoke(capture_cb_capture_fixed_started, capture_opts);
+ }
+ }
- /* Read what remains of the capture file. */
- status = cf_finish_tail(capture_opts->cf, &err);
+ if(capture_opts->real_time_mode) {
+ cf_read_status_t status;
- /* Tell the GUI, we are not doing a capture any more.
- Must be done after the cf_finish_tail(), so file lengths are displayed
- correct. */
- cf_callback_invoke(cf_cb_live_capture_update_finished, capture_opts->cf);
+ /* Read what remains of the capture file. */
+ status = cf_finish_tail(capture_opts->cf, &err);
- /* Finish the capture. */
- switch (status) {
+ /* XXX: If -Q (quit-after-cap) then cf->count clr'd below so save it first */
+ packet_count_save = cf_get_packet_count(capture_opts->cf);
+ /* Tell the GUI we are not doing a capture any more.
+ Must be done after the cf_finish_tail(), so file lengths are
+ correctly displayed */
+ capture_callback_invoke(capture_cb_capture_update_finished, capture_opts);
- case CF_READ_OK:
- if(cf_packet_count(capture_opts->cf) == 0 && !capture_opts->restart) {
- simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
-"%sNo packets captured!%s\n"
-"\n"
-"As no data was captured, closing the %scapture file!\n"
-"\n"
-"\n"
-"Help about capturing can be found at:\n"
-"\n"
-" http://wiki.ethereal.com/CaptureSetup"
+ /* Finish the capture. */
+ switch (status) {
+
+ case CF_READ_OK:
+ if ((packet_count_save == 0) && !capture_opts->restart) {
+ simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+ "%sNo packets captured!%s\n"
+ "\n"
+ "As no data was captured, closing the %scapture file!\n"
+ "\n"
+ "\n"
+ "Help about capturing can be found at:\n"
+ "\n"
+ " http://wiki.wireshark.org/CaptureSetup"
#ifdef _WIN32
-"\n\n"
-"Wireless (Wi-Fi/WLAN):\n"
-"Try to switch off promiscuous mode in the Capture Options!"
+ "\n\n"
+ "Wireless (Wi-Fi/WLAN):\n"
+ "Try to switch off promiscuous mode in the Capture Options!"
#endif
-"",
- simple_dialog_primary_start(), simple_dialog_primary_end(),
- cf_is_tempfile(capture_opts->cf) ? "temporary " : "");
- cf_close(capture_opts->cf);
- }
- break;
- case CF_READ_ERROR:
- /* Just because we got an error, that doesn't mean we were unable
- to read any of the file; we handle what we could get from the
- file. */
- break;
-
- case CF_READ_ABORTED:
- /* Exit by leaving the main loop, so that any quit functions
- we registered get called. */
- main_window_quit();
- }
+ "",
+ simple_dialog_primary_start(), simple_dialog_primary_end(),
+ cf_is_tempfile(capture_opts->cf) ? "temporary " : "");
+ cf_close(capture_opts->cf);
+ }
+ break;
+ case CF_READ_ERROR:
+ /* Just because we got an error, that doesn't mean we were unable
+ to read any of the file; we handle what we could get from the
+ file. */
+ break;
- } else {
- /* first of all, we are not doing a capture any more */
- cf_callback_invoke(cf_cb_live_capture_fixed_finished, capture_opts->cf);
-
- /* this is a normal mode capture and if no error happened, read in the capture file data */
- if(capture_opts->save_file != NULL) {
- capture_input_read_all(capture_opts, cf_is_tempfile(capture_opts->cf),
- cf_get_drops_known(capture_opts->cf), cf_get_drops(capture_opts->cf));
- }
+ case CF_READ_ABORTED:
+ /* Exit by leaving the main loop, so that any quit functions
+ we registered get called. */
+ main_window_quit();
+ break;
}
- capture_opts->state = CAPTURE_STOPPED;
+ } else {
+ /* first of all, we are not doing a capture any more */
+ capture_callback_invoke(capture_cb_capture_fixed_finished, capture_opts);
- /* if we couldn't open a capture file, there's nothing more for us to do */
- if(capture_opts->save_file == NULL) {
- cf_close(capture_opts->cf);
- return;
+ /* this is a normal mode capture and if no error happened, read in the capture file data */
+ if(capture_opts->save_file != NULL) {
+ capture_input_read_all(capture_opts, cf_is_tempfile(capture_opts->cf),
+ cf_get_drops_known(capture_opts->cf), cf_get_drops(capture_opts->cf));
}
+ }
- /* does the user wants to restart the current capture? */
- if(capture_opts->restart) {
- capture_opts->restart = FALSE;
+ if(capture_opts->show_info)
+ capture_info_close();
- eth_unlink(capture_opts->save_file);
+ capture_opts->state = CAPTURE_STOPPED;
- /* if it was a tempfile, throw away the old filename (so it will become a tempfile again) */
- if(cf_is_tempfile(capture_opts->cf)) {
- g_free(capture_opts->save_file);
- capture_opts->save_file = NULL;
- }
+ /* if we couldn't open a capture file, there's nothing more for us to do */
+ if(capture_opts->save_file == NULL) {
+ cf_close(capture_opts->cf);
+ return;
+ }
- /* ... and start the capture again */
- capture_start(capture_opts);
- } else {
- /* We're not doing a capture any more, so we don't have a save file. */
- g_free(capture_opts->save_file);
- capture_opts->save_file = NULL;
+ /* does the user wants to restart the current capture? */
+ if(capture_opts->restart) {
+ capture_opts->restart = FALSE;
+
+ ws_unlink(capture_opts->save_file);
+
+ /* if it was a tempfile, throw away the old filename (so it will become a tempfile again) */
+ if(cf_is_tempfile(capture_opts->cf)) {
+ g_free(capture_opts->save_file);
+ capture_opts->save_file = NULL;
+ }
+
+ /* ... and start the capture again */
+ if (capture_opts->ifaces->len == 0) {
+ collect_ifaces(capture_opts);
+ }
+ capture_start(capture_opts);
+ } else {
+ /* We're not doing a capture any more, so we don't have a save file. */
+ g_free(capture_opts->save_file);
+ capture_opts->save_file = NULL;
+ }
+}
+
+if_stat_cache_t *
+capture_stat_start(capture_options *capture_opts) {
+ int stat_fd, fork_child;
+ gchar *msg;
+ if_stat_cache_t *sc = NULL;
+ if_stat_cache_item_t *sc_item;
+ guint i;
+ interface_t device;
+
+ /* Fire up dumpcap. */
+ /*
+ * XXX - on systems with BPF, the number of BPF devices limits the
+ * number of devices on which you can capture simultaneously.
+ *
+ * This means that
+ *
+ * 1) this might fail if you run out of BPF devices
+ *
+ * and
+ *
+ * 2) opening every interface could leave too few BPF devices
+ * for *other* programs.
+ *
+ * It also means the system could end up getting a lot of traffic
+ * that it has to pass through the networking stack and capture
+ * mechanism, so opening all the devices and presenting packet
+ * counts might not always be a good idea.
+ */
+ if (sync_interface_stats_open(&stat_fd, &fork_child, &msg) == 0) {
+ sc = g_malloc(sizeof(if_stat_cache_t));
+ sc->stat_fd = stat_fd;
+ sc->fork_child = fork_child;
+ sc->cache_list = NULL;
+
+ /* Initialize the cache */
+ for (i = 0; i < capture_opts->all_ifaces->len; i++) {
+ device = g_array_index(capture_opts->all_ifaces, interface_t, i);
+ if (&(device.if_info)) {
+ sc_item = g_malloc0(sizeof(if_stat_cache_item_t));
+ sc_item->name = g_strdup(device.if_info.name);
+ sc->cache_list = g_list_append(sc->cache_list, sc_item);
+ }
+ }
+ }
+ return sc;
+}
+
+#define MAX_STAT_LINE_LEN 500
+
+static void
+capture_stat_cache_update(if_stat_cache_t *sc) {
+ gchar stat_line[MAX_STAT_LINE_LEN];
+ gchar **stat_parts;
+ GList *sc_entry;
+ if_stat_cache_item_t *sc_item;
+
+ if (!sc)
+ return;
+
+ while (sync_pipe_gets_nonblock(sc->stat_fd, stat_line, MAX_STAT_LINE_LEN) > 0) {
+ g_strstrip(stat_line);
+ stat_parts = g_strsplit(stat_line, "\t", 3);
+ if (stat_parts[0] == NULL || stat_parts[1] == NULL ||
+ stat_parts[2] == NULL) {
+ g_strfreev(stat_parts);
+ continue;
+ }
+ for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
+ sc_item = sc_entry->data;
+ if (strcmp(sc_item->name, stat_parts[0]) == 0) {
+ sc_item->ps.ps_recv = (u_int) strtoul(stat_parts[1], NULL, 10);
+ sc_item->ps.ps_drop = (u_int) strtoul(stat_parts[2], NULL, 10);
+ }
+ }
+ g_strfreev(stat_parts);
+ }
+}
+
+gboolean
+capture_stats(if_stat_cache_t *sc, char *ifname, struct pcap_stat *ps) {
+ GList *sc_entry;
+ if_stat_cache_item_t *sc_item;
+
+ if (!sc || !ifname || !ps) {
+ return FALSE;
+ }
+
+ capture_stat_cache_update(sc);
+ for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
+ sc_item = sc_entry->data;
+ if (strcmp(sc_item->name, ifname) == 0) {
+ memcpy(ps, &sc_item->ps, sizeof(struct pcap_stat));
+ return TRUE;
}
+ }
+ return FALSE;
}
+void
+capture_stat_stop(if_stat_cache_t *sc) {
+ GList *sc_entry;
+ if_stat_cache_item_t *sc_item;
+ int ret;
+ gchar *msg;
+
+ if (!sc)
+ return;
+
+ ret = sync_interface_stats_close(&sc->stat_fd, &sc->fork_child, &msg);
+ if (ret == -1) {
+ /* XXX - report failure? */
+ g_free(msg);
+ }
+
+ for (sc_entry = sc->cache_list; sc_entry != NULL; sc_entry = g_list_next(sc_entry)) {
+ sc_item = sc_entry->data;
+ g_free(sc_item->name);
+ g_free(sc_item);
+ }
+ g_free(sc);
+}
#endif /* HAVE_LIBPCAP */
git.samba.org / obnox / wireshark / wip.git / blobdiff