2 * Routines for getting interface information from dumpcap
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 #ifdef HAVE_ARPA_INET_H
35 #include <arpa/inet.h>
38 #ifdef HAVE_SYS_SOCKET_H
39 #include <sys/socket.h> /* needed to define AF_ values on UNIX */
42 #ifdef HAVE_WINSOCK2_H
43 #include <winsock2.h> /* needed to define AF_ values on Windows */
46 #ifdef NEED_INET_V6DEFS_H
47 # include "wsutil/inet_v6defs.h"
52 #include "capture_opts.h"
53 #include "capture_sync.h"
56 #include "capture_ifinfo.h"
59 * Fetch the interface list from a child process (dumpcap).
61 * @return A GList containing if_info_t structs if successful, NULL (with err and possibly err_str set) otherwise.
65 /* XXX - We parse simple text output to get our interface list. Should
66 * we use "real" data serialization instead, e.g. via XML? */
68 capture_interface_list(int *err, char **err_str)
71 GList *if_list = NULL;
73 gchar *data, *primary_msg, *secondary_msg;
74 gchar **raw_list, **if_parts, **addr_parts;
79 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List ...");
81 /* Try to get our interface list */
82 ret = sync_interface_list_open(&data, &primary_msg, &secondary_msg);
84 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed!");
86 *err_str = primary_msg;
90 g_free(secondary_msg);
91 *err = CANT_GET_INTERFACE_LIST;
97 raw_list = g_strsplit(data, "\r\n", 0);
99 raw_list = g_strsplit(data, "\n", 0);
103 for (i = 0; raw_list[i] != NULL; i++) {
104 if_parts = g_strsplit(raw_list[i], "\t", 4);
105 if (if_parts[0] == NULL || if_parts[1] == NULL || if_parts[2] == NULL ||
106 if_parts[3] == NULL) {
107 g_strfreev(if_parts);
111 /* Number followed by the name, e.g "1. eth0" */
112 name = strchr(if_parts[0], ' ');
116 g_strfreev(if_parts);
120 if_info = g_malloc0(sizeof(if_info_t));
121 if_info->name = g_strdup(name);
122 if (strlen(if_parts[1]) > 0)
123 if_info->description = g_strdup(if_parts[1]);
124 addr_parts = g_strsplit(if_parts[2], ",", 0);
125 for (j = 0; addr_parts[j] != NULL; j++) {
126 if_addr = g_malloc0(sizeof(if_addr_t));
127 if (inet_pton(AF_INET, addr_parts[j], &if_addr->addr.ip4_addr)) {
128 if_addr->ifat_type = IF_AT_IPv4;
129 } else if (inet_pton(AF_INET6, addr_parts[j],
130 &if_addr->addr.ip6_addr)) {
131 if_addr->ifat_type = IF_AT_IPv6;
137 if_info->addrs = g_slist_append(if_info->addrs, if_addr);
140 if (strcmp(if_parts[3], "loopback") == 0)
141 if_info->loopback = TRUE;
142 g_strfreev(if_parts);
143 g_strfreev(addr_parts);
144 if_list = g_list_append(if_list, if_info);
146 g_strfreev(raw_list);
148 /* Check to see if we built a list */
149 if (if_list == NULL) {
150 *err = NO_INTERFACES_FOUND;
152 *err_str = g_strdup("No interfaces found");
157 /* XXX - We parse simple text output to get our interface list. Should
158 * we use "real" data serialization instead, e.g. via XML? */
160 capture_get_if_capabilities(const gchar *ifname, gboolean monitor_mode,
163 if_capabilities_t *caps;
164 GList *linktype_list = NULL;
166 gchar *data, *primary_msg, *secondary_msg;
167 gchar **raw_list, **lt_parts;
168 data_link_info_t *data_link_info;
170 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities ...");
172 /* Try to get our interface list */
173 err = sync_if_capabilities_open(ifname, monitor_mode, &data,
174 &primary_msg, &secondary_msg);
176 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities failed!");
178 *err_str = primary_msg;
182 g_free(secondary_msg);
186 /* Split our lines */
188 raw_list = g_strsplit(data, "\r\n", 0);
190 raw_list = g_strsplit(data, "\n", 0);
195 * First line is 0 if monitor mode isn't supported, 1 if it is.
197 if (raw_list[0] == NULL || *raw_list[0] == '\0') {
198 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned no information!");
200 *err_str = g_strdup("Dumpcap returned no interface capability information");
206 * Allocate the interface capabilities structure.
208 caps = g_malloc(sizeof *caps);
209 switch (*raw_list[0]) {
212 caps->can_set_rfmon = FALSE;
216 caps->can_set_rfmon = TRUE;
220 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned bad information!");
222 *err_str = g_strdup_printf("Dumpcap returned \"%s\" for monitor-mode capability",
230 * The rest are link-layer types.
232 for (i = 1; raw_list[i] != NULL; i++) {
233 /* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
234 lt_parts = g_strsplit(raw_list[i], "\t", 3);
235 if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
236 g_strfreev(lt_parts);
240 data_link_info = g_malloc(sizeof (data_link_info_t));
241 data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
242 data_link_info->name = g_strdup(lt_parts[1]);
243 if (strcmp(lt_parts[2], "(not supported)") != 0)
244 data_link_info->description = g_strdup(lt_parts[2]);
246 data_link_info->description = NULL;
248 linktype_list = g_list_append(linktype_list, data_link_info);
250 g_strfreev(raw_list);
252 /* Check to see if we built a list */
253 if (linktype_list == NULL) {
256 *err_str = g_strdup("Dumpcap returned no link-layer types");
260 caps->data_link_types = linktype_list;
264 #endif /* HAVE_LIBPCAP */