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authorUlf Lamping <ulf.lamping@web.de>2005-12-06 00:07:13 +0000
committerUlf Lamping <ulf.lamping@web.de>2005-12-06 00:07:13 +0000
commit7e3a24418c8e8ccd91047deb280de9d72758d57d (patch)
tree18566adb70c9255a53d2418117833708cfa9a640 /pcap-util.c
parenta6f33f1d052192581fe1be6b5b006aa608a07611 (diff)
rename pcap-....c/.h files to capture-pcap-....c/.h
this way, the capture prefix will "logically" group the files together and file browsers will also group them we may want to move the files into a subdir capture later svn path=/trunk/; revision=16691
Diffstat (limited to 'pcap-util.c')
-rw-r--r--pcap-util.c433
1 files changed, 0 insertions, 433 deletions
diff --git a/pcap-util.c b/pcap-util.c
deleted file mode 100644
index 38565f4e87..0000000000
--- a/pcap-util.c
+++ /dev/null
@@ -1,433 +0,0 @@
-/* pcap-util.c
- * Utility routines for packet capture
- *
- * $Id$
- *
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
- * 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 <pcap.h>
-
-#include <glib.h>
-
-#include <stdlib.h>
-#include <limits.h>
-#include <string.h>
-
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-
-#include <wtap.h>
-#include <wtap-capture.h>
-
-#include "pcap-util.h"
-#include "pcap-util-int.h"
-
-#ifndef _WIN32
-#include <netinet/in.h>
-#endif
-
-
-/*
- * Get the data-link type for a libpcap device.
- * This works around AIX 5.x's non-standard and incompatible-with-the-
- * rest-of-the-universe libpcap.
- */
-int
-get_pcap_linktype(pcap_t *pch, char *devname
-#ifndef _AIX
- _U_
-#endif
-)
-{
- int linktype;
-#ifdef _AIX
- char *ifacename;
-#endif
-
- linktype = pcap_datalink(pch);
-#ifdef _AIX
-
- /*
- * The libpcap that comes with AIX 5.x uses RFC 1573 ifType values
- * rather than DLT_ values for link-layer types; the ifType values
- * for LAN devices are:
- *
- * Ethernet 6
- * 802.3 7
- * Token Ring 9
- * FDDI 15
- *
- * and the ifType value for a loopback device is 24.
- *
- * The AIX names for LAN devices begin with:
- *
- * Ethernet en
- * 802.3 et
- * Token Ring tr
- * FDDI fi
- *
- * and the AIX names for loopback devices begin with "lo".
- *
- * (The difference between "Ethernet" and "802.3" is presumably
- * whether packets have an Ethernet header, with a packet type,
- * or an 802.3 header, with a packet length, followed by an 802.2
- * header and possibly a SNAP header.)
- *
- * If the device name matches "linktype" interpreted as an ifType
- * value, rather than as a DLT_ value, we will assume this is AIX's
- * non-standard, incompatible libpcap, rather than a standard libpcap,
- * and will map the link-layer type to the standard DLT_ value for
- * that link-layer type, as that's what the rest of Ethereal expects.
- *
- * (This means the capture files won't be readable by a tcpdump
- * linked with AIX's non-standard libpcap, but so it goes. They
- * *will* be readable by standard versions of tcpdump, Ethereal,
- * and so on.)
- *
- * XXX - if we conclude we're using AIX libpcap, should we also
- * set a flag to cause us to assume the time stamps are in
- * seconds-and-nanoseconds form, and to convert them to
- * seconds-and-microseconds form before processing them and
- * writing them out?
- */
-
- /*
- * Find the last component of the device name, which is the
- * interface name.
- */
- ifacename = strchr(devname, '/');
- if (ifacename == NULL)
- ifacename = devname;
-
- /* See if it matches any of the LAN device names. */
- if (strncmp(ifacename, "en", 2) == 0) {
- if (linktype == 6) {
- /*
- * That's the RFC 1573 value for Ethernet; map it
- * to DLT_EN10MB.
- */
- linktype = 1;
- }
- } else if (strncmp(ifacename, "et", 2) == 0) {
- if (linktype == 7) {
- /*
- * That's the RFC 1573 value for 802.3; map it to
- * DLT_EN10MB.
- * (libpcap, tcpdump, Ethereal, etc. don't care if
- * it's Ethernet or 802.3.)
- */
- linktype = 1;
- }
- } else if (strncmp(ifacename, "tr", 2) == 0) {
- if (linktype == 9) {
- /*
- * That's the RFC 1573 value for 802.5 (Token Ring);
- * map it to DLT_IEEE802, which is what's used for
- * Token Ring.
- */
- linktype = 6;
- }
- } else if (strncmp(ifacename, "fi", 2) == 0) {
- if (linktype == 15) {
- /*
- * That's the RFC 1573 value for FDDI; map it to
- * DLT_FDDI.
- */
- linktype = 10;
- }
- } else if (strncmp(ifacename, "lo", 2) == 0) {
- if (linktype == 24) {
- /*
- * That's the RFC 1573 value for "software loopback"
- * devices; map it to DLT_NULL, which is what's used
- * for loopback devices on BSD.
- */
- linktype = 0;
- }
- }
-#endif
-
- return linktype;
-}
-
-if_info_t *
-if_info_new(char *name, char *description)
-{
- if_info_t *if_info;
-
- if_info = g_malloc(sizeof (if_info_t));
- if_info->name = g_strdup(name);
- if (description == NULL)
- if_info->description = NULL;
- else
- if_info->description = g_strdup(description);
- if_info->ip_addr = NULL;
- if_info->loopback = FALSE;
- return if_info;
-}
-
-void
-if_info_add_address(if_info_t *if_info, struct sockaddr *addr)
-{
- if_addr_t *ip_addr;
- struct sockaddr_in *ai;
-#ifdef INET6
- struct sockaddr_in6 *ai6;
-#endif
-
- switch (addr->sa_family) {
-
- case AF_INET:
- ai = (struct sockaddr_in *)addr;
- ip_addr = g_malloc(sizeof(*ip_addr));
- ip_addr->type = AT_IPv4;
- ip_addr->ip_addr.ip4_addr =
- *((guint32 *)&(ai->sin_addr.s_addr));
- if_info->ip_addr = g_slist_append(if_info->ip_addr, ip_addr);
- break;
-
-#ifdef INET6
- case AF_INET6:
- ai6 = (struct sockaddr_in6 *)addr;
- ip_addr = g_malloc(sizeof(*ip_addr));
- ip_addr->type = AT_IPv6;
- memcpy((void *)&ip_addr->ip_addr.ip6_addr,
- (void *)&ai6->sin6_addr.s6_addr,
- sizeof ip_addr->ip_addr.ip6_addr);
- if_info->ip_addr = g_slist_append(if_info->ip_addr, ip_addr);
- break;
-#endif
- }
-}
-
-#ifdef HAVE_PCAP_FINDALLDEVS
-/*
- * Get all IP address information, and the loopback flag, for the given
- * interface.
- */
-static void
-if_info_ip(if_info_t *if_info, pcap_if_t *d)
-{
- pcap_addr_t *a;
-
- /* Loopback flag */
- if_info->loopback = (d->flags & PCAP_IF_LOOPBACK) ? TRUE : FALSE;
-
- /* All addresses */
- for (a = d->addresses; a != NULL; a = a->next) {
- if (a->addr != NULL)
- if_info_add_address(if_info, a->addr);
- }
-}
-
-GList *
-get_interface_list_findalldevs(int *err, char *err_str)
-{
- GList *il = NULL;
- pcap_if_t *alldevs, *dev;
- if_info_t *if_info;
-
- if (pcap_findalldevs(&alldevs, err_str) == -1) {
- *err = CANT_GET_INTERFACE_LIST;
- return NULL;
- }
-
- if (alldevs == NULL) {
- /*
- * No interfaces found.
- */
- *err = NO_INTERFACES_FOUND;
- return NULL;
- }
-
- for (dev = alldevs; dev != NULL; dev = dev->next) {
- if_info = if_info_new(dev->name, dev->description);
- il = g_list_append(il, if_info);
- if_info_ip(if_info, dev);
- }
- pcap_freealldevs(alldevs);
-
- return il;
-}
-#endif /* HAVE_PCAP_FINDALLDEVS */
-
-static void
-free_if_info_addr_cb(gpointer addr, gpointer user_data _U_)
-{
- g_free(addr);
-}
-
-static void
-free_if_cb(gpointer data, gpointer user_data _U_)
-{
- if_info_t *if_info = data;
-
- g_free(if_info->name);
- if (if_info->description != NULL)
- g_free(if_info->description);
-
- g_slist_foreach(if_info->ip_addr, free_if_info_addr_cb, NULL);
- g_slist_free(if_info->ip_addr);
-}
-
-void
-free_interface_list(GList *if_list)
-{
- g_list_foreach(if_list, free_if_cb, NULL);
- g_list_free(if_list);
-}
-
-/*
- * Get the data-link types available for a libpcap device.
- */
-static data_link_info_t *
-create_data_link_info(int dlt)
-{
- data_link_info_t *data_link_info;
-#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
- const char *typename;
-#endif
- int wtap_encap;
-
- data_link_info = g_malloc(sizeof (data_link_info_t));
- data_link_info->dlt = dlt;
-#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
- typename = pcap_datalink_val_to_name(dlt);
- if (typename != NULL)
- data_link_info->name = g_strdup(typename);
- else
-#endif
- data_link_info->name = g_strdup_printf("DLT %d", dlt);
- wtap_encap = wtap_pcap_encap_to_wtap_encap(dlt);
- if (wtap_encap == WTAP_ENCAP_UNKNOWN) {
- /*
- * We don't support this in Wiretap.
- * However, we should, so you can capture on it.
- * Put in an entry for it, with no description.
- */
- data_link_info->description = NULL;
- } else {
- /*
- * If this is null, that's a bug in
- * "wtap_pcap_encap_to_wtap_encap()" - it should always
- * return a valid encapsulation type - so we assume it's
- * not null.
- */
- data_link_info->description =
- g_strdup(wtap_encap_string(wtap_encap));
- }
- return data_link_info;
-}
-
-GList *
-get_pcap_linktype_list(char *devname, char *err_buf)
-{
- GList *linktype_list = NULL;
- pcap_t *pch;
- int deflt;
-#ifdef HAVE_PCAP_SET_DATALINK
- int *linktypes;
- int i, nlt;
-#endif
- data_link_info_t *data_link_info;
-
- pch = pcap_open_live(devname, MIN_PACKET_SIZE, 0, 0, err_buf);
- if (pch == NULL)
- return NULL;
- err_buf[0] = '\0'; /* an empty list doesn't mean an error */
- deflt = get_pcap_linktype(pch, devname);
-#ifdef HAVE_PCAP_LIST_DATALINKS
- nlt = pcap_list_datalinks(pch, &linktypes);
- if (nlt == 0 || linktypes == NULL)
- return NULL;
- for (i = 0; i < nlt; i++) {
- data_link_info = create_data_link_info(linktypes[i]);
-
- /*
- * XXX - for 802.11, make the most detailed 802.11
- * version the default, rather than the one the
- * device has as the default?
- */
- if (linktypes[i] == deflt)
- linktype_list = g_list_prepend(linktype_list,
- data_link_info);
- else
- linktype_list = g_list_append(linktype_list,
- data_link_info);
- }
- free(linktypes);
-#else
- data_link_info = create_data_link_info(deflt);
- linktype_list = g_list_append(linktype_list, data_link_info);
-#endif
-
- pcap_close(pch);
- return linktype_list;
-}
-
-static void
-free_linktype_cb(gpointer data, gpointer user_data _U_)
-{
- data_link_info_t *linktype_info = data;
-
- g_free(linktype_info->name);
- if (linktype_info->description != NULL)
- g_free(linktype_info->description);
-}
-
-void
-free_pcap_linktype_list(GList *linktype_list)
-{
- g_list_foreach(linktype_list, free_linktype_cb, NULL);
- g_list_free(linktype_list);
-}
-
-/* Set the data link type on a pcap. */
-const char *
-set_pcap_linktype(pcap_t *pch, char *devname
-#ifdef HAVE_PCAP_SET_DATALINK
- _U_
-#endif
- , int dlt)
-{
-#ifdef HAVE_PCAP_SET_DATALINK
- if (pcap_set_datalink(pch, dlt) == 0)
- return NULL; /* no error */
- return pcap_geterr(pch);
-#else
- /* Let them set it to the type it is; reject any other request. */
- if (get_pcap_linktype(pch, devname) == dlt)
- return NULL; /* no error */
- return "That DLT isn't one of the DLTs supported by this device";
-#endif
-}
-
-#endif /* HAVE_LIBPCAP */