*
* $Id$
*
- * 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
#ifdef HAVE_LIBPCAP
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#endif
-#ifdef HAVE_IO_H
-# include <io.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h> /* needed to define AF_ values on UNIX */
+#endif
+
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h> /* needed to define AF_ values on Windows */
+#endif
+
+#ifdef NEED_INET_V6DEFS_H
+# include "inet_v6defs.h"
#endif
#include <signal.h>
#include <errno.h>
-#include <pcap.h>
-
#include <glib.h>
#include <epan/packet.h>
#include <epan/dfilter/dfilter.h>
+#include <epan/ws_strsplit.h>
#include "file.h"
#include "capture.h"
#include "capture_sync.h"
+#include "capture_info.h"
#include "capture_ui_utils.h"
#include "util.h"
-#include "pcap-util.h"
+#include "capture-pcap-util.h"
#include "alert_box.h"
#include "simple_dialog.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 "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 */
+};
-/**
+/**
* Start a capture.
*
* @return TRUE if the capture starts successfully, FALSE otherwise.
/* close the currently loaded capture file */
cf_close(capture_opts->cf);
- /* try to start the capture child process */
- ret = sync_pipe_do_capture(capture_opts, capture_opts->save_file == NULL);
+ g_assert(capture_opts->state == CAPTURE_STOPPED);
+ capture_opts->state = CAPTURE_PREPARING;
- if(ret) {
- /* tell callbacks (menu, ...) that capture is running now */
- cf_callback_invoke(cf_cb_live_capture_prepare, capture_opts);
- } else {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Start ...");
+
+ /* try to start the capture child process */
+ ret = sync_pipe_start(capture_opts);
+ if(!ret) {
if(capture_opts->save_file != NULL) {
g_free(capture_opts->save_file);
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) */
+
+ /* 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->iface);
}
return ret;
}
+void
+capture_stop(capture_options *capture_opts)
+{
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Stop ...");
+
+ cf_callback_invoke(cf_cb_live_capture_stopping, capture_opts);
+
+ /* stop the capture child gracefully */
+ sync_pipe_stop(capture_opts);
+}
+
+
+void
+capture_restart(capture_options *capture_opts)
+{
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Restart");
+
+ capture_opts->restart = TRUE;
+ capture_stop(capture_opts);
+}
+
+
+void
+capture_kill_child(capture_options *capture_opts)
+{
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "Capture Kill");
+
+ /* kill the capture child */
+ sync_pipe_kill(capture_opts->fork_child);
+}
+
+
+
/* We've succeeded 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;
+ 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. */
- return FALSE;
- }
-
- /* Set the read filter to NULL. */
- /* 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.
-
- XXX - there are currently no packet-drop statistics stored
- in libpcap captures, and that's what we're reading.
-
- At some point, we will add support in Wiretap to return
- packet-drop statistics for capture file formats that store it,
- and will make "cf_read()" get those statistics from Wiretap.
- We clear the statistics (marking them as "not known") in
- "cf_open()", and "cf_read()" will only fetch them and mark
- them as known if Wiretap supplies them, so if we get the
- statistics now, after calling "cf_open()" but before calling
- "cf_read()", the values we store will be used by "cf_read()".
-
- If a future libpcap capture file format stores the statistics,
- we'll put them into the capture file that we write, and will
- thus not have to set them here - "cf_read()" will get them from
- the file and use them. */
- if (drops_known) {
- cf_set_drops_known(capture_opts->cf, TRUE);
-
- /* XXX - on some systems, libpcap doesn't bother filling in
- "ps_ifdrop" - it doesn't even set it to zero - so we don't
- bother looking at it.
-
- Ideally, libpcap would have an interface that gave us
- several statistics - perhaps including various interface
- error statistics - and would tell us which of them it
- supplies, allowing us to display only the ones it does. */
- cf_set_drops(capture_opts->cf, drops);
- }
-
- /* read in the packet data */
- switch (cf_read(capture_opts->cf)) {
+ /* 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. */
+ return FALSE;
+ }
- case CF_READ_OK:
- 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;
+ /* Set the read filter to NULL. */
+ /* 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.
+
+ XXX - there are currently no packet-drop statistics stored
+ in libpcap captures, and that's what we're reading.
+
+ At some point, we will add support in Wiretap to return
+ packet-drop statistics for capture file formats that store it,
+ and will make "cf_read()" get those statistics from Wiretap.
+ We clear the statistics (marking them as "not known") in
+ "cf_open()", and "cf_read()" will only fetch them and mark
+ them as known if Wiretap supplies them, so if we get the
+ statistics now, after calling "cf_open()" but before calling
+ "cf_read()", the values we store will be used by "cf_read()".
+
+ If a future libpcap capture file format stores the statistics,
+ we'll put them into the capture file that we write, and will
+ thus not have to set them here - "cf_read()" will get them from
+ the file and use them. */
+ if (drops_known) {
+ cf_set_drops_known(capture_opts->cf, TRUE);
+
+ /* XXX - on some systems, libpcap doesn't bother filling in
+ "ps_ifdrop" - it doesn't even set it to zero - so we don't
+ bother looking at it.
+
+ Ideally, libpcap would have an interface that gave us
+ several statistics - perhaps including various interface
+ error statistics - and would tell us which of them it
+ supplies, allowing us to display only the ones it does. */
+ cf_set_drops(capture_opts->cf, drops);
+ }
- case CF_READ_ABORTED:
- /* 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;
- }
+ /* read in the packet data */
+ switch (cf_read(capture_opts->cf)) {
+
+ case CF_READ_OK:
+ 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:
+ /* 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) {
- simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
- "%sNo packets captured!%s\n\n"
- "As no data was captured, closing the %scapture file!",
- simple_dialog_primary_start(), simple_dialog_primary_end(),
- (cf_is_tempfile(capture_opts->cf)) ? "temporary " : "");
- cf_close(capture_opts->cf);
- }
+ /* if we didn't captured 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"
+"\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!"
+#endif
+"",
+ simple_dialog_primary_start(), simple_dialog_primary_end(),
+ (cf_is_tempfile(capture_opts->cf)) ? "temporary " : "");
+ cf_close(capture_opts->cf);
+ }
return TRUE;
}
-/* 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)
{
int err;
- /*g_warning("New capture file: %s", new_file);*/
+ if(capture_opts->state == CAPTURE_PREPARING) {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
+ }
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
- /* free the old filename */
- if(capture_opts->save_file != NULL) {
- /* we start a new capture file, simply close the old one */
- /* XXX - is it enough to call cf_close here? */
- /* XXX - is it safe to call cf_close even if the file is close before? */
- cf_close(capture_opts->cf);
- g_free(capture_opts->save_file);
- is_tempfile = FALSE;
- } else {
- /* we didn't had a save_file before, must be a tempfile */
- is_tempfile = TRUE;
- cf_set_tempfile(capture_opts->cf, TRUE);
- }
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
- /* save the new filename */
- capture_opts->save_file = g_strdup(new_file);
+ /* 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 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);
+ cf_finish_tail(capture_opts->cf, &err);
+ cf_close(capture_opts->cf);
+ }
+ g_free(capture_opts->save_file);
+ is_tempfile = FALSE;
+ cf_set_tempfile(capture_opts->cf, FALSE);
+ } else {
+ /* we didn't had 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)) {
- case CF_OK:
- break;
- case CF_ERROR:
- /* 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;
- }
+ /* save the new filename */
+ capture_opts->save_file = g_strdup(new_file);
- /* XXX - currently won't work with non real-time mode */
- cf_callback_invoke(cf_cb_live_capture_started, capture_opts->cf);
+ /* 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)) {
+ case CF_OK:
+ break;
+ case CF_ERROR:
+ /* 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;
}
+ }
+
+ if(capture_opts->show_info) {
+ if (!capture_info_new_file(new_file))
+ return FALSE;
+ }
+
+ 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);
+ }
+ capture_opts->state = CAPTURE_RUNNING;
- return TRUE;
+ 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)
{
int err;
+ g_assert(capture_opts->save_file);
+
if(capture_opts->real_time_mode) {
- /* Read from the capture file the number of records the child told us
- it added.
- XXX - do something if this fails? */
- switch (cf_continue_tail(capture_opts->cf, to_read, &err)) {
-
- case CF_READ_OK:
- 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.
-
- XXX - abort on a read error? */
- break;
-
- case CF_READ_ABORTED:
- /* Kill the child capture process; the user wants to exit, and we
- shouldn't just leave it running. */
- capture_kill_child(capture_opts);
- break;
- }
+ /* Read from the capture file the number of records the child told us it added. */
+ switch (cf_continue_tail(capture_opts->cf, to_read, &err)) {
+
+ case CF_READ_OK:
+ 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.
+
+ XXX - abort on a read error? */
+ cf_callback_invoke(cf_cb_live_capture_update_continue, capture_opts->cf);
+ break;
+
+ case CF_READ_ABORTED:
+ /* Kill the child capture process; the user wants to exit, and we
+ shouldn't just leave it running. */
+ capture_kill_child(capture_opts);
+ break;
+ }
+ } else {
+ /* increase capture file packet counter by the number or incoming packets */
+ cf_set_packet_count(capture_opts->cf,
+ cf_get_packet_count(capture_opts->cf) + to_read);
+
+ cf_callback_invoke(cf_cb_live_capture_fixed_continue, capture_opts->cf);
}
+
+ /* 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.
+ */
+void
+capture_input_drops(capture_options *capture_opts, int dropped)
+{
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_INFO, "%d packet%s dropped", dropped, plurality(dropped, "", "s"));
+
+ g_assert(capture_opts->state == CAPTURE_RUNNING);
+
+ cf_set_drops_known(capture_opts->cf, TRUE);
+ cf_set_drops(capture_opts->cf, dropped);
+}
+
+
+/* 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_msg, char *secondary_error_msg)
+{
+ gchar *safe_error_msg;
+ gchar *safe_secondary_error_msg;
+
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Error message from child: \"%s\", \"%s\"",
+ error_msg, secondary_error_msg);
+
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
+
+ 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_cfilter_error_message(capture_options *capture_opts, char *error_message)
+{
+ dfilter_t *rfcode = NULL;
+ gchar *safe_cfilter = simple_dialog_format_message(capture_opts->cfilter);
+ gchar *safe_cfilter_error_msg = simple_dialog_format_message(error_message);
+
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture filter error message from child: \"%s\"", error_message);
+
+ g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
+
+ /* Did the user try a display filter? */
+ if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "%sInvalid capture filter: \"%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,
+ simple_dialog_primary_end(), safe_cfilter_error_msg);
+ dfilter_free(rfcode);
+ } else {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "%sInvalid capture filter: \"%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,
+ simple_dialog_primary_end(), safe_cfilter_error_msg);
+ }
+ g_free(safe_cfilter_error_msg);
+ g_free(safe_cfilter);
+
+ /* 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)
{
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 we didn't started 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_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->real_time_mode) {
- /* Read what remains of the capture file, and finish the capture.
- XXX - do something if this fails? */
- switch (cf_finish_tail(capture_opts->cf, &err)) {
+ cf_read_status_t status;
+
+ /* Read what remains of the capture file. */
+ status = cf_finish_tail(capture_opts->cf, &err);
+
+ /* 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 displayed
+ correct. */
+ cf_callback_invoke(cf_cb_live_capture_update_finished, capture_opts->cf);
+
+ /* Finish the capture. */
+ switch (status) {
case CF_READ_OK:
- if(cf_packet_count(capture_opts->cf) == 0) {
- simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
- "%sNo packets captured!%s\n\n"
- "As no data was captured, closing the %scapture file!",
+ 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!"
+#endif
+"",
simple_dialog_primary_start(), simple_dialog_primary_end(),
cf_is_tempfile(capture_opts->cf) ? "temporary " : "");
cf_close(capture_opts->cf);
main_window_quit();
}
- cf_callback_invoke(cf_cb_live_capture_finished, capture_opts->cf);
-
} else {
- /* this is a normal mode capture, read in the capture file data */
- 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));
+ /* 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));
+ }
}
- /* We're not doing a capture any more, so we don't have a save file. */
- g_assert(capture_opts->save_file);
- g_free(capture_opts->save_file);
- capture_opts->save_file = NULL;
+ if(capture_opts->show_info)
+ capture_info_close();
+
+ capture_opts->state = CAPTURE_STOPPED;
+
+ /* 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;
+ }
+
+ /* does the user wants to restart the current capture? */
+ if(capture_opts->restart) {
+ capture_opts->restart = FALSE;
+
+ eth_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 */
+ 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;
+ }
}
+/**
+ * Fetch the interface list from a child process (dumpcap).
+ *
+ * @return A GList containing if_info_t structs if successful, NULL otherwise.
+ */
-void
-capture_stop(capture_options *capture_opts)
+/* XXX - We parse simple text output to get our interface list. Should
+ * we use "real" data serialization instead, e.g. via XML? */
+GList *
+capture_interface_list(int *err, char **err_str)
{
- /* stop the capture child gracefully, if we have one */
- sync_pipe_stop(capture_opts);
+ GList *if_list = NULL;
+ int i, j;
+ gchar *msg;
+ gchar **raw_list, **if_parts, **addr_parts;
+ gchar *name;
+ if_info_t *if_info;
+ if_addr_t *if_addr;
+
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
+
+ /* Try to get our interface list */
+ *err = sync_interface_list_open(&msg);
+ if (*err != 0) {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
+ if (err_str) {
+ if (*err_str)
+ *err_str = msg;
+ else
+ g_free(msg);
+ } else {
+ g_free(msg);
+ }
+ return NULL;
+ }
+
+ /* Split our lines */
+ raw_list = g_strsplit(msg, "\n", 0);
+ g_free(msg);
+
+ for (i = 0; raw_list[i] != NULL; i++) {
+ if_parts = g_strsplit(raw_list[i], "\t", 4);
+ if (if_parts[0] == NULL || if_parts[1] == NULL || if_parts[2] == NULL ||
+ if_parts[3] == NULL) {
+ g_strfreev(if_parts);
+ continue;
+ }
+
+ /* Number followed by the name, e.g "1. eth0" */
+ name = strchr(if_parts[0], ' ');
+ if (name) {
+ name++;
+ } else {
+ g_strfreev(if_parts);
+ continue;
+ }
+
+ if_info = g_malloc0(sizeof(if_info_t));
+ if_info->name = g_strdup(name);
+ if (strlen(if_parts[1]) > 0)
+ if_info->description = g_strdup(if_parts[1]);
+ addr_parts = g_strsplit(if_parts[2], ",", 0);
+ for (j = 0; addr_parts[j] != NULL; j++) {
+ if_addr = g_malloc0(sizeof(if_addr_t));
+ if (inet_pton(AF_INET, addr_parts[j], &if_addr->ip_addr.ip4_addr)) {
+ if_addr->type = AT_IPv4;
+ } else if (inet_pton(AF_INET6, addr_parts[j],
+ &if_addr->ip_addr.ip6_addr)) {
+ if_addr->type = AT_IPv6;
+ } else {
+ g_free(if_addr);
+ if_addr = NULL;
+ }
+ if (if_addr) {
+ if_info->ip_addr = g_slist_append(if_info->ip_addr, if_addr);
+ }
+ }
+ if (strcmp(if_parts[3], "loopback") == 0)
+ if_info->loopback = TRUE;
+ g_strfreev(if_parts);
+ g_strfreev(addr_parts);
+ if_list = g_list_append(if_list, if_info);
+ }
+ g_strfreev(raw_list);
+
+ /* Check to see if we built a list */
+ if (if_list == NULL) {
+ if (err_str && *err_str)
+ *err_str = g_strdup("No interfaces found");
+ *err = NO_INTERFACES_FOUND;
+ }
+ return if_list;
}
-void
-capture_kill_child(capture_options *capture_opts)
+/* XXX - We parse simple text output to get our interface list. Should
+ * we use "real" data serialization instead, e.g. via XML? */
+GList *
+capture_pcap_linktype_list(const gchar *ifname, char **err_str)
{
- /* kill the capture child, if we have one */
- sync_pipe_kill(capture_opts);
+ GList *linktype_list = NULL;
+ int err, i;
+ gchar *msg;
+ gchar **raw_list, **lt_parts;
+ data_link_info_t *data_link_info;
+
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
+
+ /* Try to get our interface list */
+ err = sync_linktype_list_open(ifname, &msg);
+ if (err != 0) {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
+ if (err_str) {
+ *err_str = msg;
+ } else {
+ g_free(msg);
+ }
+ return NULL;
+ }
+
+ /* Split our lines */
+ raw_list = g_strsplit(msg, "\n", 0);
+ g_free(msg);
+
+ for (i = 0; raw_list[i] != NULL; i++) {
+ /* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
+ lt_parts = g_strsplit(raw_list[i], "\t", 3);
+ if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
+ g_strfreev(lt_parts);
+ continue;
+ }
+
+ data_link_info = g_malloc(sizeof (data_link_info_t));
+ data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
+ data_link_info->name = g_strdup(lt_parts[1]);
+ if (strcmp(lt_parts[2], "(not supported)") != 0)
+ data_link_info->description = g_strdup(lt_parts[2]);
+ else
+ data_link_info->description = NULL;
+
+ linktype_list = g_list_append(linktype_list, data_link_info);
+ }
+ g_strfreev(raw_list);
+
+ /* Check to see if we built a list */
+ if (linktype_list == NULL) {
+ if (err_str)
+ *err_str = NULL;
+ }
+ return linktype_list;
+}
+
+if_stat_cache_t *
+capture_stat_start(GList *if_list) {
+ int stat_fd, fork_child;
+ gchar *msg;
+ if_stat_cache_t *sc = NULL;
+ GList *if_entry;
+ if_info_t *if_info;
+ if_stat_cache_item_t *sc_item;
+
+ /* 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 (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
+ if_info = if_entry->data;
+ sc_item = g_malloc0(sizeof(if_stat_cache_item_t));
+ sc_item->name = g_strdup(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;
+ gchar *msg;
+
+ if (!sc)
+ return;
+
+ sync_interface_stats_close(&sc->stat_fd, &sc->fork_child, &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