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wireshark/gtk/capture_if_dlg.c

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/* capture_if_dlg.c
* Routines for the capture interface dialog
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_LIBPCAP
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#include <pcap.h>
#include <gtk/gtk.h>
#include "globals.h"
#include "pcap-util.h"
#ifdef _WIN32
#include "capture-wpcap.h"
#endif
#include "compat_macros.h"
#include "simple_dialog.h"
#include "capture.h"
#include "capture_dlg.h"
#include "capture_if_details_dlg.h"
#include "ui_util.h"
#include "dlg_utils.h"
#include "wtap.h"
#include "main.h"
#include "help_dlg.h"
extern gboolean is_capture_in_progress(void);
/*
* Keep a static pointer to the current "Capture Interfaces" window, if
* any, so that if somebody tries to do "Capture:Start" while there's
* already a "Capture Interfaces" window up, we just pop up the existing
* one, rather than creating a new one.
*/
static GtkWidget *cap_if_w;
GList *if_data = NULL;
guint timer_id;
GtkWidget *stop_bt;
GList *if_list;
/*
* Timeout, in milliseconds, for reads from the stream of captured packets.
*/
#define CAP_READ_TIMEOUT 250
/* the "runtime" data of one interface */
typedef struct if_dlg_data_s {
pcap_t *pch;
GtkWidget *device_lb;
GtkWidget *descr_lb;
GtkWidget *ip_lb;
GtkWidget *curr_lb;
GtkWidget *last_lb;
GtkWidget *capture_bt;
GtkWidget *prepare_bt;
#ifdef _WIN32
GtkWidget *details_bt;
#endif
guint32 last_packets;
gchar *device;
} if_dlg_data_t;
void update_if(if_dlg_data_t *if_dlg_data);
/* start capture button was pressed */
static void
capture_do_cb(GtkWidget *capture_bt _U_, gpointer if_data)
{
if_dlg_data_t *if_dlg_data = if_data;
if (capture_opts->iface)
g_free(capture_opts->iface);
capture_opts->iface = g_strdup(if_dlg_data->device);
/* XXX - remove this? */
if (capture_opts->save_file) {
g_free(capture_opts->save_file);
capture_opts->save_file = NULL;
}
capture_start_cb(NULL, NULL);
}
/* prepare capture button was pressed */
static void
capture_prepare_cb(GtkWidget *prepare_bt _U_, gpointer if_data)
{
if_dlg_data_t *if_dlg_data = if_data;
if (capture_opts->iface)
g_free(capture_opts->iface);
capture_opts->iface = g_strdup(if_dlg_data->device);
capture_prep_cb(NULL, NULL);
}
#ifdef _WIN32
/* capture details button was pressed */
static void
capture_details_cb(GtkWidget *details_bt _U_, gpointer if_data)
{
if_dlg_data_t *if_dlg_data = if_data;
capture_if_details_open(if_dlg_data->device);
}
#endif
/* open a single interface */
void
open_if(gchar *name, if_dlg_data_t *if_dlg_data)
{
gchar open_err_str[PCAP_ERRBUF_SIZE];
/*
* 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_dlg_data->pch = pcap_open_live(name,
MIN_PACKET_SIZE,
capture_opts->promisc_mode, CAP_READ_TIMEOUT,
open_err_str);
if (if_dlg_data->pch != NULL) {
update_if(if_dlg_data);
} else {
printf("open_if: %s\n", open_err_str);
gtk_label_set_text(GTK_LABEL(if_dlg_data->curr_lb), "error");
gtk_label_set_text(GTK_LABEL(if_dlg_data->last_lb), "error");
}
}
/* update a single interface */
void
update_if(if_dlg_data_t *if_dlg_data)
{
struct pcap_stat stats;
gchar *str;
guint diff;
/* pcap_stats() stats values differ on libpcap and winpcap!
* libpcap: returns the number of packets since pcap_open_live
* winpcap: returns the number of packets since the last pcap_stats call
* XXX - if that's true, that's a bug, and should be fixed; "pcap_stats()"
* is supposed to work the same way on all platforms, including Windows.
* Note that the WinPcap 3.0 documentation says "The values represent
* packet statistics from the start of the run to the time of the call."
* (Note also that some versions of libpcap, on some versions of UN*X,
* have the same bug.)
*/
if (if_dlg_data->pch) {
if(pcap_stats(if_dlg_data->pch, &stats) >= 0) {
#ifdef _WIN32
diff = stats.ps_recv - if_dlg_data->last_packets;
if_dlg_data->last_packets = stats.ps_recv;
#else
diff = stats.ps_recv;
if_dlg_data->last_packets = stats.ps_recv + if_dlg_data->last_packets;
#endif
str = g_strdup_printf("%u", if_dlg_data->last_packets);
gtk_label_set_text(GTK_LABEL(if_dlg_data->curr_lb), str);
g_free(str);
str = g_strdup_printf("%u", diff);
gtk_label_set_text(GTK_LABEL(if_dlg_data->last_lb), str);
g_free(str);
gtk_widget_set_sensitive(if_dlg_data->curr_lb, diff);
gtk_widget_set_sensitive(if_dlg_data->last_lb, diff);
} else {
gtk_label_set_text(GTK_LABEL(if_dlg_data->curr_lb), "error");
gtk_label_set_text(GTK_LABEL(if_dlg_data->last_lb), "error");
}
}
}
/* close a single interface */
void
close_if(if_dlg_data_t *if_dlg_data)
{
if(if_dlg_data->pch)
pcap_close(if_dlg_data->pch);
}
/* update all interfaces */
gboolean
update_all(gpointer data)
{
GList *curr;
int ifs;
if(!cap_if_w) {
return FALSE;
}
for(ifs = 0; (curr = g_list_nth(data, ifs)); ifs++) {
update_if(curr->data);
}
return TRUE;
}
/* a live capture has started or stopped */
void
set_capture_if_dialog_for_capture_in_progress(gboolean capture_in_progress)
{
GList *curr;
int ifs;
if(cap_if_w) {
gtk_widget_set_sensitive(stop_bt, capture_in_progress);
for(ifs = 0; (curr = g_list_nth(if_data, ifs)); ifs++) {
if_dlg_data_t *if_dlg_data = curr->data;
gtk_widget_set_sensitive(if_dlg_data->capture_bt, !capture_in_progress);
gtk_widget_set_sensitive(if_dlg_data->prepare_bt, !capture_in_progress);
}
}
}
/* the window was closed, cleanup things */
static void
capture_if_destroy_cb(GtkWidget *win _U_, gpointer user_data _U_)
{
GList *curr;
int ifs;
gtk_timeout_remove(timer_id);
for(ifs = 0; (curr = g_list_nth(if_data, ifs)); ifs++) {
if_dlg_data_t *if_dlg_data = curr->data;
close_if(if_dlg_data);
g_free(curr->data);
}
if_data = NULL;
free_interface_list(if_list);
/* Note that we no longer have a "Capture Options" dialog box. */
cap_if_w = NULL;
}
/* start getting capture stats from all interfaces */
void
capture_if_cb(GtkWidget *w _U_, gpointer d _U_)
{
GtkWidget *main_vb, *bbox, *close_bt, *help_bt;
GtkWidget *if_tb;
GtkWidget *if_lb;
#if GTK_MAJOR_VERSION < 2
GtkAccelGroup *accel_group;
#endif
GtkTooltips *tooltips;
int err;
char err_str[PCAP_ERRBUF_SIZE];
gchar *cant_get_if_list_errstr;
int row;
if_dlg_data_t *if_dlg_data;
int ifs;
GList *curr;
if_info_t *if_info;
GSList *curr_ip;
if_addr_t *ip_addr;
GString *if_tool_str = g_string_new("");
gchar *tmp_str;
if (cap_if_w != NULL) {
/* There's already a "Capture Interfaces" dialog box; reactivate it. */
reactivate_window(cap_if_w);
return;
}
#ifdef _WIN32
/* Is WPcap loaded? */
if (!has_wpcap) {
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Unable to load WinPcap (wpcap.dll); Ethereal will not be able\n"
"to capture packets.\n\n"
"In order to capture packets, WinPcap must be installed; see\n"
"\n"
" http://www.winpcap.org/\n"
"\n"
"or the mirror at\n"
"\n"
" http://winpcap.mirror.ethereal.com/\n"
"\n"
"or the mirror at\n"
"\n"
" http://www.mirrors.wiretapped.net/security/packet-capture/winpcap/\n"
"\n"
"for a downloadable version of WinPcap and for instructions\n"
"on how to install WinPcap.");
return;
}
#endif
if_list = get_interface_list(&err, err_str);
if (if_list == NULL && err == CANT_GET_INTERFACE_LIST) {
cant_get_if_list_errstr = cant_get_if_list_error_message(err_str);
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s",
cant_get_if_list_errstr);
g_free(cant_get_if_list_errstr);
return;
}
cap_if_w = window_new(GTK_WINDOW_TOPLEVEL, "Ethereal: Capture Interfaces");
tooltips = gtk_tooltips_new();
#if GTK_MAJOR_VERSION < 2
/* Accelerator group for the accelerators (or, as they're called in
Windows and, I think, in Motif, "mnemonics"; Alt+<key> is a mnemonic,
Ctrl+<key> is an accelerator). */
accel_group = gtk_accel_group_new();
gtk_window_add_accel_group(GTK_WINDOW(cap_if_w), accel_group);
#endif
main_vb = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(main_vb), 5);
gtk_container_add(GTK_CONTAINER(cap_if_w), main_vb);
if_tb = gtk_table_new(6,1, FALSE);
gtk_table_set_row_spacings(GTK_TABLE(if_tb), 3);
gtk_table_set_col_spacings(GTK_TABLE(if_tb), 3);
gtk_container_add(GTK_CONTAINER(main_vb), if_tb);
row = 0;
#ifndef _WIN32
/*
* On Windows, device names are generally not meaningful - NT 5
* uses long blobs with GUIDs in them, for example - so we don't
* bother showing them.
*/
if_lb = gtk_label_new("Device");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_lb, 0, 1, row, row+1);
#endif
if_lb = gtk_label_new("Description");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_lb, 1, 2, row, row+1);
if_lb = gtk_label_new(" IP ");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_lb, 2, 3, row, row+1);
if_lb = gtk_label_new("Packets");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_lb, 3, 4, row, row+1);
if_lb = gtk_label_new(" Packets/s ");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_lb, 4, 5, row, row+1);
stop_bt = BUTTON_NEW_FROM_STOCK(GTK_STOCK_STOP);
gtk_tooltips_set_tip(tooltips, stop_bt,
"Stop a running capture.", NULL);
#ifdef _WIN32
gtk_table_attach_defaults(GTK_TABLE(if_tb), stop_bt, 5, 8, row, row+1);
#else
gtk_table_attach_defaults(GTK_TABLE(if_tb), stop_bt, 5, 7, row, row+1);
#endif
SIGNAL_CONNECT(stop_bt, "clicked", capture_stop_cb, NULL);
row++;
for(ifs = 0; (curr = g_list_nth(if_list, ifs)); ifs++) {
g_string_assign(if_tool_str, "");
if_info = curr->data;
if_dlg_data = g_malloc0(sizeof(if_dlg_data_t));
/* device name */
if_dlg_data->device_lb = gtk_label_new(if_info->name);
if_dlg_data->device = if_info->name;
#ifndef _WIN32
gtk_misc_set_alignment(GTK_MISC(if_dlg_data->device_lb), 0.0, 0.5);
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->device_lb, 0, 1, row, row+1);
#endif
g_string_append(if_tool_str, "Device: ");
g_string_append(if_tool_str, if_info->name);
g_string_append(if_tool_str, "\n");
/* description */
if (if_info->description != NULL)
if_dlg_data->descr_lb = gtk_label_new(if_info->description);
else
if_dlg_data->descr_lb = gtk_label_new("");
gtk_misc_set_alignment(GTK_MISC(if_dlg_data->descr_lb), 0.0, 0.5);
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->descr_lb, 1, 2, row, row+1);
if (if_info->description) {
g_string_append(if_tool_str, "Description: ");
g_string_append(if_tool_str, if_info->description);
g_string_append(if_tool_str, "\n");
}
/* IP address */
/* only the first IP address will be shown */
g_string_append(if_tool_str, "IP: ");
curr_ip = g_slist_nth(if_info->ip_addr, 0);
if(curr_ip) {
ip_addr = (if_addr_t *)curr_ip->data;
switch (ip_addr->type) {
case AT_IPv4:
tmp_str = ip_to_str((guint8 *)&ip_addr->ip_addr.ip4_addr);
break;
case AT_IPv6:
tmp_str = ip6_to_str((struct e_in6_addr *)&ip_addr->ip_addr.ip6_addr);
break;
default:
g_assert_not_reached();
tmp_str = NULL;
}
if_dlg_data->ip_lb = gtk_label_new(tmp_str);
gtk_widget_set_sensitive(if_dlg_data->ip_lb, TRUE);
g_string_append(if_tool_str, tmp_str);
} else {
if_dlg_data->ip_lb = gtk_label_new("unknown");
gtk_widget_set_sensitive(if_dlg_data->ip_lb, FALSE);
g_string_append(if_tool_str, "unknown");
}
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->ip_lb, 2, 3, row, row+1);
g_string_append(if_tool_str, "\n");
/* packets */
if_dlg_data->curr_lb = gtk_label_new("-");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->curr_lb, 3, 4, row, row+1);
/* packets/s */
if_dlg_data->last_lb = gtk_label_new("-");
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->last_lb, 4, 5, row, row+1);
/* capture button */
if_dlg_data->capture_bt = gtk_button_new_with_label("Capture");
SIGNAL_CONNECT(if_dlg_data->capture_bt, "clicked", capture_do_cb, if_dlg_data);
tmp_str = g_strdup_printf("Immediately start a capture from this interface:\n\n%s", if_tool_str->str);
gtk_tooltips_set_tip(tooltips, if_dlg_data->capture_bt,
tmp_str, NULL);
g_free(tmp_str);
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->capture_bt, 5, 6, row, row+1);
/* prepare button */
if_dlg_data->prepare_bt = gtk_button_new_with_label("Prepare");
SIGNAL_CONNECT(if_dlg_data->prepare_bt, "clicked", capture_prepare_cb, if_dlg_data);
gtk_tooltips_set_tip(tooltips, if_dlg_data->prepare_bt,
"Open the capture options dialog with this interface selected.", NULL);
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->prepare_bt, 6, 7, row, row+1);
/* details button */
#ifdef _WIN32
if_dlg_data->details_bt = gtk_button_new_with_label("Details");
SIGNAL_CONNECT(if_dlg_data->details_bt, "clicked", capture_details_cb, if_dlg_data);
gtk_tooltips_set_tip(tooltips, if_dlg_data->details_bt,
"Open the capture details dialog of this interface.", NULL);
gtk_table_attach_defaults(GTK_TABLE(if_tb), if_dlg_data->details_bt, 7, 8, row, row+1);
#endif
open_if(if_info->name, if_dlg_data);
if_data = g_list_append(if_data, if_dlg_data);
row++;
}
g_string_free(if_tool_str, TRUE);
/* Button row: close button */
if(topic_available(HELP_CAPTURE_INTERFACES_DIALOG)) {
bbox = dlg_button_row_new(GTK_STOCK_CLOSE, GTK_STOCK_HELP, NULL);
} else {
bbox = dlg_button_row_new(GTK_STOCK_CLOSE, NULL);
}
gtk_box_pack_start(GTK_BOX(main_vb), bbox, FALSE, FALSE, 5);
close_bt = OBJECT_GET_DATA(bbox, GTK_STOCK_CLOSE);
window_set_cancel_button(cap_if_w, close_bt, window_cancel_button_cb);
gtk_tooltips_set_tip(tooltips, close_bt, "Close this window.", NULL);
if(topic_available(HELP_CAPTURE_INTERFACES_DIALOG)) {
help_bt = OBJECT_GET_DATA(bbox, GTK_STOCK_HELP);
SIGNAL_CONNECT(help_bt, "clicked", topic_cb, HELP_CAPTURE_INTERFACES_DIALOG);
}
gtk_widget_grab_default(close_bt);
SIGNAL_CONNECT(cap_if_w, "delete_event", window_delete_event_cb, NULL);
SIGNAL_CONNECT(cap_if_w, "destroy", capture_if_destroy_cb, NULL);
gtk_widget_show_all(cap_if_w);
window_present(cap_if_w);
set_capture_if_dialog_for_capture_in_progress(is_capture_in_progress());
/* update the interface list every 1000ms */
timer_id = gtk_timeout_add(1000, update_all, if_data);
}
#endif /* HAVE_LIBPCAP */
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