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/* capture_ifinfo.c
* Routines for getting interface information from dumpcap
*
* $Id$
*
* 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
* 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
#include <stdlib.h>
#include <string.h>
#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 <glib.h>
#include "capture_opts.h"
#include "capture_sync.h"
#include "log.h"
#include "capture_ifinfo.h"
/**
* Fetch the interface list from a child process (dumpcap).
*
* @return A GList containing if_info_t structs if successful, NULL (with err and possibly err_str set) otherwise.
*
*/
/* 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)
{
int ret;
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 */
ret = sync_interface_list_open(&msg);
if (ret != 0) {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
if (err_str) {
*err_str = msg;
} else {
g_free(msg);
}
*err = CANT_RUN_DUMPCAP;
return NULL;
}
/* Split our lines */
#ifdef _WIN32
raw_list = g_strsplit(msg, "\r\n", 0);
#else
raw_list = g_strsplit(msg, "\n", 0);
#endif
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->addr.ip4_addr)) {
if_addr->ifat_type = IF_AT_IPv4;
} else if (inet_pton(AF_INET6, addr_parts[j],
&if_addr->addr.ip6_addr)) {
if_addr->ifat_type = IF_AT_IPv6;
} else {
g_free(if_addr);
if_addr = NULL;
}
if (if_addr) {
if_info->addrs = g_slist_append(if_info->addrs, 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) {
*err = NO_INTERFACES_FOUND;
if (err_str)
*err_str = g_strdup("No interfaces found");
}
return if_list;
}
/* 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)
{
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 Linktype 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 Linktype List failed!");
if (err_str) {
*err_str = msg;
} else {
g_free(msg);
}
return NULL;
}
/* Split our lines */
#ifdef _WIN32
raw_list = g_strsplit(msg, "\r\n", 0);
#else
raw_list = g_strsplit(msg, "\n", 0);
#endif
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;
}
#endif /* HAVE_LIBPCAP */
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