![Joerg Mayer](/assets/img/avatar_default.png)
compiling with HAVE_PCAP_REMOTE (and ENABLE_ECHLD) Change-Id: If5524f2d3dcacca9c82a46167480c8436dd8b1b2 Reviewed-on: https://code.wireshark.org/review/20615 Petri-Dish: Jörg Mayer <jmayer@loplof.de> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Jörg Mayer <jmayer@loplof.de>
380 lines
12 KiB
C
380 lines
12 KiB
C
/* capture_ifinfo.c
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* Routines for getting interface information from dumpcap
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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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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#include <stdio.h>
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#include <glib.h>
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#include "capture_opts.h"
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#include "capchild/capture_session.h"
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#include "capchild/capture_sync.h"
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#ifdef HAVE_EXTCAP
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#include "extcap.h"
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#endif
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#include "log.h"
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#include <caputils/capture_ifinfo.h>
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#include <wsutil/inet_addr.h>
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#ifdef HAVE_PCAP_REMOTE
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static GList *remote_interface_list = NULL;
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static GList * append_remote_list(GList *iflist)
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{
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GSList *list;
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GList *rlist;
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if_addr_t *if_addr, *temp_addr;
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if_info_t *if_info, *temp;
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for (rlist = g_list_nth(remote_interface_list, 0); rlist != NULL; rlist = g_list_next(rlist)) {
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if_info = (if_info_t *)rlist->data;
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temp = (if_info_t*) g_malloc0(sizeof(if_info_t));
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temp->name = g_strdup(if_info->name);
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temp->friendly_name = g_strdup(if_info->friendly_name);
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temp->vendor_description = g_strdup(if_info->vendor_description);
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for (list = g_slist_nth(if_info->addrs, 0); list != NULL; list = g_slist_next(list)) {
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temp_addr = (if_addr_t *) g_malloc0(sizeof(if_addr_t));
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if_addr = (if_addr_t *)list->data;
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if (if_addr) {
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temp_addr->ifat_type = if_addr->ifat_type;
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if (temp_addr->ifat_type == IF_AT_IPv4) {
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temp_addr->addr.ip4_addr = if_addr->addr.ip4_addr;
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} else {
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memcpy(temp_addr->addr.ip6_addr, if_addr->addr.ip6_addr, sizeof(if_addr->addr));
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}
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} else {
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g_free(temp_addr);
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temp_addr = NULL;
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}
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if (temp_addr) {
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temp->addrs = g_slist_append(temp->addrs, temp_addr);
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}
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}
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temp->loopback = if_info->loopback;
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iflist = g_list_append(iflist, temp);
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}
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return iflist;
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}
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#endif
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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, void (*update_cb)(void))
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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 *data, *primary_msg, *secondary_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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*err = 0;
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/* Try to get our interface list */
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ret = sync_interface_list_open(&data, &primary_msg, &secondary_msg, update_cb);
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if (ret != 0) {
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#ifdef HAVE_EXTCAP
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/* Add the extcap interfaces that can exist, even if no native interfaces have been found */
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Loading External Capture Interface List ...");
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if_list = append_extcap_interface_list(if_list, err_str);
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/* err_str is ignored, as the error for the interface loading list will take precedence */
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if ( g_list_length(if_list) == 0 ) {
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#endif
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface List failed. Error %d, %s (%s)",
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*err, primary_msg ? primary_msg : "no message",
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secondary_msg ? secondary_msg : "no secondary message");
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if (err_str) {
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*err_str = primary_msg;
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} else {
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g_free(primary_msg);
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}
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g_free(secondary_msg);
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*err = CANT_GET_INTERFACE_LIST;
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#ifdef HAVE_EXTCAP
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}
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#endif
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return if_list;
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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(data, "\r\n", 0);
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#else
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raw_list = g_strsplit(data, "\n", 0);
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#endif
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g_free(data);
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for (i = 0; raw_list[i] != NULL; i++) {
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#ifdef HAVE_EXTCAP
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if_parts = g_strsplit(raw_list[i], "\t", 7);
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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 || if_parts[4] == NULL || if_parts[5] == NULL ||
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if_parts[6] == NULL) {
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g_strfreev(if_parts);
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continue;
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}
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#else
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if_parts = g_strsplit(raw_list[i], "\t", 6);
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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 || if_parts[4] == NULL || if_parts[5] == NULL) {
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g_strfreev(if_parts);
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continue;
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}
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#endif
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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_new0(if_info_t,1);
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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->vendor_description = g_strdup(if_parts[1]);
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if (strlen(if_parts[2]) > 0)
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if_info->friendly_name = g_strdup(if_parts[2]);
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if_info->type = (interface_type)(int)strtol(if_parts[3], NULL, 10);
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addr_parts = g_strsplit(if_parts[4], ",", 0);
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for (j = 0; addr_parts[j] != NULL; j++) {
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if_addr = g_new0(if_addr_t,1);
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if (ws_inet_pton4(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 (ws_inet_pton6(addr_parts[j], (struct e_in6_addr *)&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[5], "loopback") == 0)
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if_info->loopback = TRUE;
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#ifdef HAVE_EXTCAP
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if_info->extcap = g_strdup(if_parts[6]);
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#endif
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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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#ifdef HAVE_PCAP_REMOTE
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if (remote_interface_list && g_list_length(remote_interface_list) > 0) {
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if_list = append_remote_list(if_list);
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}
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#endif
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#ifdef HAVE_EXTCAP
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/* Add the extcap interfaces after the native and remote interfaces */
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Loading External Capture Interface List ...");
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if_list = append_extcap_interface_list(if_list, err_str);
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#endif
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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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if_capabilities_t *
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capture_get_if_capabilities(const gchar *ifname, gboolean monitor_mode,
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const gchar *auth_string,
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char **err_str, void (*update_cb)(void))
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{
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if_capabilities_t *caps;
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GList *linktype_list = NULL;
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int err, i;
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gchar *data, *primary_msg, *secondary_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 Interface Capabilities ...");
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#ifdef HAVE_EXTCAP
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/* see if the interface is from extcap */
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caps = extcap_get_if_dlts(ifname, err_str);
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if (caps != NULL)
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return caps;
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/* return if the extcap interface generated an error */
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if (err_str != NULL && *err_str != NULL)
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return NULL;
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#endif /* HAVE_EXTCAP */
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/* Try to get our interface list */
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err = sync_if_capabilities_open(ifname, monitor_mode, auth_string, &data,
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&primary_msg, &secondary_msg, update_cb);
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if (err != 0) {
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities failed. Error %d, %s (%s)",
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err, primary_msg ? primary_msg : "no message",
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secondary_msg ? secondary_msg : "no secondary message");
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if (err_str) {
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*err_str = primary_msg;
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} else {
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g_free(primary_msg);
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}
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g_free(secondary_msg);
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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(data, "\r\n", 0);
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#else
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raw_list = g_strsplit(data, "\n", 0);
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#endif
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g_free(data);
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/*
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* First line is 0 if monitor mode isn't supported, 1 if it is.
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*/
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if (raw_list[0] == NULL || *raw_list[0] == '\0') {
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned no information.");
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if (err_str) {
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*err_str = g_strdup("Dumpcap returned no interface capability information");
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}
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g_strfreev(raw_list);
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return NULL;
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}
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/*
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* Allocate the interface capabilities structure.
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*/
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caps = (if_capabilities_t *)g_malloc(sizeof *caps);
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switch (*raw_list[0]) {
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case '0':
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caps->can_set_rfmon = FALSE;
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break;
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case '1':
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caps->can_set_rfmon = TRUE;
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break;
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default:
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g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned bad information.");
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if (err_str) {
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*err_str = g_strdup_printf("Dumpcap returned \"%s\" for monitor-mode capability",
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raw_list[0]);
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}
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g_free(caps);
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g_strfreev(raw_list);
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return NULL;
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}
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/*
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* The rest are link-layer types.
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*/
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for (i = 1; 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_new(data_link_info_t,1);
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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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g_strfreev(lt_parts);
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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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/* No. */
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if (err_str)
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*err_str = g_strdup("Dumpcap returned no link-layer types");
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g_free(caps);
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return NULL;
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}
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caps->data_link_types = linktype_list;
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return caps;
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}
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#ifdef HAVE_PCAP_REMOTE
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void add_interface_to_remote_list(if_info_t *if_info)
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{
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GSList *list;
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if_addr_t *if_addr, *temp_addr;
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if_info_t *temp = (if_info_t*) g_malloc0(sizeof(if_info_t));
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temp->name = g_strdup(if_info->name);
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temp->friendly_name = g_strdup(if_info->friendly_name);
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temp->vendor_description = g_strdup(if_info->vendor_description);
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for (list = g_slist_nth(if_info->addrs, 0); list != NULL; list = g_slist_next(list)) {
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temp_addr = (if_addr_t *)g_malloc0(sizeof(if_addr_t));
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if_addr = (if_addr_t *)list->data;
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if (if_addr) {
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temp_addr->ifat_type = if_addr->ifat_type;
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if (temp_addr->ifat_type == IF_AT_IPv4) {
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temp_addr->addr.ip4_addr = if_addr->addr.ip4_addr;
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} else {
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memcpy(temp_addr->addr.ip6_addr, if_addr->addr.ip6_addr, sizeof(if_addr->addr));
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}
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} else {
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g_free(temp_addr);
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temp_addr = NULL;
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}
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if (temp_addr) {
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temp->addrs = g_slist_append(temp->addrs, temp_addr);
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}
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}
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temp->loopback = if_info->loopback;
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remote_interface_list = g_list_append(remote_interface_list, temp);
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}
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#endif
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#endif /* HAVE_LIBPCAP */
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