forked from osmocom/wireshark
218 lines
6.2 KiB
C
218 lines
6.2 KiB
C
/* capture_ifinfo.c
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* Routines for getting interface information from dumpcap
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_LIBPCAP
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h> /* needed to define AF_ values on UNIX */
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#endif
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#ifdef HAVE_WINSOCK2_H
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#include <winsock2.h> /* needed to define AF_ values on Windows */
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#endif
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#ifdef NEED_INET_V6DEFS_H
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# include "inet_v6defs.h"
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#endif
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#include <glib.h>
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#include "capture_opts.h"
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#include "capture_sync.h"
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#include "log.h"
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#include "capture_ifinfo.h"
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/**
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* Fetch the interface list from a child process (dumpcap).
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*
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* @return A GList containing if_info_t structs if successful, NULL (with err and possibly err_str set) otherwise.
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*
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*/
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/* XXX - We parse simple text output to get our interface list. Should
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* we use "real" data serialization instead, e.g. via XML? */
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GList *
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capture_interface_list(int *err, char **err_str)
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{
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int ret;
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GList *if_list = NULL;
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int i, j;
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gchar *msg;
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gchar **raw_list, **if_parts, **addr_parts;
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gchar *name;
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if_info_t *if_info;
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if_addr_t *if_addr;
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
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/* Try to get our interface list */
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ret = sync_interface_list_open(&msg);
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if (ret != 0) {
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
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if (err_str) {
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*err_str = msg;
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} else {
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g_free(msg);
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}
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*err = CANT_RUN_DUMPCAP;
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return NULL;
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}
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/* Split our lines */
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#ifdef _WIN32
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raw_list = g_strsplit(msg, "\r\n", 0);
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#else
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raw_list = g_strsplit(msg, "\n", 0);
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#endif
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g_free(msg);
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for (i = 0; raw_list[i] != NULL; i++) {
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if_parts = g_strsplit(raw_list[i], "\t", 4);
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if (if_parts[0] == NULL || if_parts[1] == NULL || if_parts[2] == NULL ||
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if_parts[3] == NULL) {
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g_strfreev(if_parts);
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continue;
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}
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/* Number followed by the name, e.g "1. eth0" */
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name = strchr(if_parts[0], ' ');
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if (name) {
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name++;
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} else {
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g_strfreev(if_parts);
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continue;
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}
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if_info = g_malloc0(sizeof(if_info_t));
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if_info->name = g_strdup(name);
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if (strlen(if_parts[1]) > 0)
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if_info->description = g_strdup(if_parts[1]);
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addr_parts = g_strsplit(if_parts[2], ",", 0);
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for (j = 0; addr_parts[j] != NULL; j++) {
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if_addr = g_malloc0(sizeof(if_addr_t));
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if (inet_pton(AF_INET, addr_parts[j], &if_addr->addr.ip4_addr)) {
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if_addr->ifat_type = IF_AT_IPv4;
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} else if (inet_pton(AF_INET6, addr_parts[j],
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&if_addr->addr.ip6_addr)) {
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if_addr->ifat_type = IF_AT_IPv6;
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} else {
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g_free(if_addr);
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if_addr = NULL;
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}
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if (if_addr) {
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if_info->addrs = g_slist_append(if_info->addrs, if_addr);
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}
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}
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if (strcmp(if_parts[3], "loopback") == 0)
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if_info->loopback = TRUE;
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g_strfreev(if_parts);
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g_strfreev(addr_parts);
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if_list = g_list_append(if_list, if_info);
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}
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g_strfreev(raw_list);
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/* Check to see if we built a list */
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if (if_list == NULL) {
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*err = NO_INTERFACES_FOUND;
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if (err_str)
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*err_str = g_strdup("No interfaces found");
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}
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return if_list;
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}
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/* XXX - We parse simple text output to get our interface list. Should
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* we use "real" data serialization instead, e.g. via XML? */
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GList *
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capture_pcap_linktype_list(const gchar *ifname, char **err_str)
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{
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GList *linktype_list = NULL;
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int err, i;
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gchar *msg;
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gchar **raw_list, **lt_parts;
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data_link_info_t *data_link_info;
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Linktype List ...");
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/* Try to get our interface list */
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err = sync_linktype_list_open(ifname, &msg);
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if (err != 0) {
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Linktype List failed!");
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if (err_str) {
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*err_str = msg;
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} else {
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g_free(msg);
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}
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return NULL;
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}
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/* Split our lines */
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#ifdef _WIN32
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raw_list = g_strsplit(msg, "\r\n", 0);
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#else
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raw_list = g_strsplit(msg, "\n", 0);
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#endif
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g_free(msg);
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for (i = 0; raw_list[i] != NULL; i++) {
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/* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
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lt_parts = g_strsplit(raw_list[i], "\t", 3);
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if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
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g_strfreev(lt_parts);
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continue;
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}
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data_link_info = g_malloc(sizeof (data_link_info_t));
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data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
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data_link_info->name = g_strdup(lt_parts[1]);
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if (strcmp(lt_parts[2], "(not supported)") != 0)
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data_link_info->description = g_strdup(lt_parts[2]);
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else
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data_link_info->description = NULL;
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linktype_list = g_list_append(linktype_list, data_link_info);
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}
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g_strfreev(raw_list);
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/* Check to see if we built a list */
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if (linktype_list == NULL) {
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if (err_str)
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*err_str = NULL;
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}
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return linktype_list;
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}
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#endif /* HAVE_LIBPCAP */
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