forked from osmocom/wireshark
d2a72bbc87
casts that are actually safe. svn path=/trunk/; revision=36861
346 lines
8.4 KiB
C
346 lines
8.4 KiB
C
/* capture-pcap-util.c
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* Utility routines for packet capture
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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 <glib.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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#include <string.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#include <wtap.h>
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#include <libpcap.h>
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#include "capture_ifinfo.h"
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#include "capture-pcap-util.h"
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#include "capture-pcap-util-int.h"
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#ifndef _WIN32
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#include <netinet/in.h>
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#endif
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if_info_t *
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if_info_new(char *name, char *description)
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{
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if_info_t *if_info;
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if_info = (if_info_t *)g_malloc(sizeof (if_info_t));
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if_info->name = g_strdup(name);
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if (description == NULL)
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if_info->description = NULL;
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else
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if_info->description = g_strdup(description);
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if_info->addrs = NULL;
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if_info->loopback = FALSE;
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return if_info;
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}
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void
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if_info_add_address(if_info_t *if_info, struct sockaddr *addr)
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{
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if_addr_t *if_addr;
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struct sockaddr_in *ai;
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#ifdef INET6
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struct sockaddr_in6 *ai6;
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#endif
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switch (addr->sa_family) {
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case AF_INET:
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ai = (struct sockaddr_in *)(void *)addr;
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if_addr = (if_addr_t *)g_malloc(sizeof(*if_addr));
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if_addr->ifat_type = IF_AT_IPv4;
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if_addr->addr.ip4_addr =
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*((guint32 *)&(ai->sin_addr.s_addr));
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if_info->addrs = g_slist_append(if_info->addrs, if_addr);
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break;
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#ifdef INET6
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case AF_INET6:
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ai6 = (struct sockaddr_in6 *)(void *)addr;
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if_addr = (if_addr_t *)g_malloc(sizeof(*if_addr));
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if_addr->ifat_type = IF_AT_IPv6;
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memcpy((void *)&if_addr->addr.ip6_addr,
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(void *)&ai6->sin6_addr.s6_addr,
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sizeof if_addr->addr.ip6_addr);
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if_info->addrs = g_slist_append(if_info->addrs, if_addr);
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break;
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#endif
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}
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}
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#ifdef HAVE_PCAP_FINDALLDEVS
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/*
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* Get all IP address information, and the loopback flag, for the given
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* interface.
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*/
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static void
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if_info_ip(if_info_t *if_info, pcap_if_t *d)
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{
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pcap_addr_t *a;
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/* Loopback flag */
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if_info->loopback = (d->flags & PCAP_IF_LOOPBACK) ? TRUE : FALSE;
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/* All addresses */
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for (a = d->addresses; a != NULL; a = a->next) {
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if (a->addr != NULL)
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if_info_add_address(if_info, a->addr);
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}
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}
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#ifdef HAVE_PCAP_REMOTE
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GList *
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get_interface_list_findalldevs_ex(const char *source,
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struct pcap_rmtauth *auth,
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int *err, char **err_str)
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{
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GList *il = NULL;
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pcap_if_t *alldevs, *dev;
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if_info_t *if_info;
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char errbuf[PCAP_ERRBUF_SIZE];
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if (pcap_findalldevs_ex((char *)source, auth, &alldevs, errbuf) == -1) {
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*err = CANT_GET_INTERFACE_LIST;
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if (err_str != NULL)
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*err_str = cant_get_if_list_error_message(errbuf);
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return NULL;
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}
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if (alldevs == NULL) {
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/*
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* No interfaces found.
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*/
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*err = NO_INTERFACES_FOUND;
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if (err_str != NULL)
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*err_str = NULL;
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return NULL;
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}
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for (dev = alldevs; dev != NULL; dev = dev->next) {
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if_info = if_info_new(dev->name, dev->description);
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il = g_list_append(il, if_info);
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if_info_ip(if_info, dev);
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}
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pcap_freealldevs(alldevs);
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return il;
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}
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#endif
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GList *
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get_interface_list_findalldevs(int *err, char **err_str)
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{
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GList *il = NULL;
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pcap_if_t *alldevs, *dev;
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if_info_t *if_info;
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char errbuf[PCAP_ERRBUF_SIZE];
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if (pcap_findalldevs(&alldevs, errbuf) == -1) {
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*err = CANT_GET_INTERFACE_LIST;
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if (err_str != NULL)
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*err_str = cant_get_if_list_error_message(errbuf);
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return NULL;
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}
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if (alldevs == NULL) {
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/*
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* No interfaces found.
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*/
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*err = NO_INTERFACES_FOUND;
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if (err_str != NULL)
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*err_str = NULL;
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return NULL;
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}
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for (dev = alldevs; dev != NULL; dev = dev->next) {
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if_info = if_info_new(dev->name, dev->description);
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il = g_list_append(il, if_info);
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if_info_ip(if_info, dev);
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}
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pcap_freealldevs(alldevs);
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return il;
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}
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#endif /* HAVE_PCAP_FINDALLDEVS */
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static void
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free_if_info_addr_cb(gpointer addr, gpointer user_data _U_)
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{
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g_free(addr);
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}
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static void
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free_if_cb(gpointer data, gpointer user_data _U_)
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{
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if_info_t *if_info = (if_info_t *)data;
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g_free(if_info->name);
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g_free(if_info->description);
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g_slist_foreach(if_info->addrs, free_if_info_addr_cb, NULL);
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g_slist_free(if_info->addrs);
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g_free(if_info);
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}
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void
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free_interface_list(GList *if_list)
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{
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g_list_foreach(if_list, free_if_cb, NULL);
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g_list_free(if_list);
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}
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#if !defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) || !defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || !defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION)
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struct dlt_choice {
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const char *name;
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const char *description;
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int dlt;
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};
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#define DLT_CHOICE(code, description) { #code, description, code }
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#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
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static struct dlt_choice dlt_choices[] = {
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DLT_CHOICE(DLT_NULL, "BSD loopback"),
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DLT_CHOICE(DLT_EN10MB, "Ethernet"),
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DLT_CHOICE(DLT_IEEE802, "Token ring"),
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DLT_CHOICE(DLT_ARCNET, "ARCNET"),
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DLT_CHOICE(DLT_SLIP, "SLIP"),
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DLT_CHOICE(DLT_PPP, "PPP"),
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DLT_CHOICE(DLT_FDDI, "FDDI"),
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DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 IP-over-ATM"),
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DLT_CHOICE(DLT_RAW, "Raw IP"),
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DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
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DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
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DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
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DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
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DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
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DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
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DLT_CHOICE(DLT_IEEE802_11, "802.11"),
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DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
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DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
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DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
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DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
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DLT_CHOICE(DLT_LTALK, "Localtalk"),
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DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
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DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
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DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
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DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
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DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus BSD radio information header"),
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DLT_CHOICE(DLT_APPLE_IP_OVER_IEEE1394, "Apple IP-over-IEEE 1394"),
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DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
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DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
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DLT_CHOICE(DLT_IEEE802_11_RADIO_AVS, "802.11 plus AVS radio information header"),
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DLT_CHOICE_SENTINEL
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};
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#if !defined(HAVE_PCAP_DATALINK_NAME_TO_VAL)
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static int
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pcap_datalink_name_to_val(const char *name)
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{
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int i;
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for (i = 0; dlt_choices[i].name != NULL; i++) {
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if (g_ascii_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
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name) == 0)
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return (dlt_choices[i].dlt);
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}
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return (-1);
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}
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#endif /* defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) */
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#if !defined(HAVE_PCAP_DATALINK_VAL_TO_NAME)
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static const char *
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pcap_datalink_val_to_name(int dlt)
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{
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int i;
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for (i = 0; dlt_choices[i].name != NULL; i++) {
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if (dlt_choices[i].dlt == dlt)
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return (dlt_choices[i].name + sizeof("DLT_") - 1);
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}
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return (NULL);
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}
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#endif /* defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) */
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#if !defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION)
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const char *
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pcap_datalink_val_to_description(int dlt)
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{
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int i;
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for (i = 0; dlt_choices[i].name != NULL; i++) {
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if (dlt_choices[i].dlt == dlt)
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return (dlt_choices[i].description);
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}
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return (NULL);
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}
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#endif /* defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION) */
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#endif /* !defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || !defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION) */
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static void
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free_linktype_cb(gpointer data, gpointer user_data _U_)
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{
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data_link_info_t *linktype_info = (data_link_info_t *)data;
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g_free(linktype_info->name);
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g_free(linktype_info->description);
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}
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void
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free_if_capabilities(if_capabilities_t *caps)
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{
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g_list_foreach(caps->data_link_types, free_linktype_cb, NULL);
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g_list_free(caps->data_link_types);
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g_free(caps);
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}
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const char *
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linktype_val_to_name(int dlt)
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{
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return pcap_datalink_val_to_name(dlt);
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}
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int linktype_name_to_val(const char *linktype)
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{
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return pcap_datalink_name_to_val(linktype);
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}
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#endif /* HAVE_LIBPCAP */
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