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authorGuy Harris <guy@alum.mit.edu>2014-07-04 00:24:02 -0700
committerGuy Harris <guy@alum.mit.edu>2014-07-04 07:25:26 +0000
commit9e6487f24751d1c1a047ee82e158077ac67c9c68 (patch)
tree3cc4a8524062948f4951914dc9af489e0d7c4572 /capture-pcap-util-unix.c
parentc5643a3d257909ed3e8752cd729b9192ae719683 (diff)
Move utility routines for capturing into a libcaputils static library.
Some of those routines are used only in dumpcap; others are used in TShark and Wireshark as well. Change-Id: I9d92483f2fcff57a7d8b6bf6bdf2870505d19fb7 Reviewed-on: https://code.wireshark.org/review/2841 Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'capture-pcap-util-unix.c')
-rw-r--r--capture-pcap-util-unix.c396
1 files changed, 0 insertions, 396 deletions
diff --git a/capture-pcap-util-unix.c b/capture-pcap-util-unix.c
deleted file mode 100644
index f169d701e3..0000000000
--- a/capture-pcap-util-unix.c
+++ /dev/null
@@ -1,396 +0,0 @@
-/* capture-pcap-util-unix.c
- * UN*X-specific utility routines for packet capture
- *
- * Wireshark - Network traffic analyzer
- * By Gerald Combs <gerald@wireshark.org>
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h"
-
-#include <glib.h>
-
-#ifdef HAVE_LIBPCAP
-
-#ifdef HAVE_PCAP_FINDALLDEVS
-
-#include <pcap.h>
-
-#else /* HAVE_PCAP_FINDALLDEVS */
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-
-#ifdef HAVE_SYS_IOCTL_H
-#include <sys/ioctl.h>
-#endif
-
-/*
- * Keep Digital UNIX happy when including <net/if.h>.
- */
-struct mbuf;
-struct rtentry;
-#include <net/if.h>
-
-#ifdef HAVE_SYS_SOCKIO_H
-# include <sys/sockio.h>
-#endif
-
-#include "capture-pcap-util.h"
-
-#endif /* HAVE_PCAP_FINDALLDEVS */
-
-#include <capchild/capture_ifinfo.h>
-#include "capture-pcap-util.h"
-#include "capture-pcap-util-int.h"
-
-#ifdef HAVE_PCAP_REMOTE
-GList *
-get_remote_interface_list(const char *hostname, const char *port,
- int auth_type, const char *username,
- const char *passwd, int *err, char **err_str)
-{
- struct pcap_rmtauth auth;
- char source[PCAP_BUF_SIZE];
- char errbuf[PCAP_ERRBUF_SIZE];
- GList *result;
-
- if (pcap_createsrcstr(source, PCAP_SRC_IFREMOTE, hostname, port,
- NULL, errbuf) == -1) {
- *err = CANT_GET_INTERFACE_LIST;
- if (err_str != NULL)
- *err_str = cant_get_if_list_error_message(errbuf);
- return NULL;
- }
-
- auth.type = auth_type;
- auth.username = g_strdup(username);
- auth.password = g_strdup(passwd);
-
- result = get_interface_list_findalldevs_ex(source, &auth, err, err_str);
- g_free(auth.username);
- g_free(auth.password);
-
- return result;
-}
-#endif
-
-#ifdef HAVE_PCAP_FINDALLDEVS
-GList *
-get_interface_list(int *err, char **err_str)
-{
- return get_interface_list_findalldevs(err, err_str);
-}
-#else /* HAVE_PCAP_FINDALLDEVS */
-struct search_user_data {
- char *name;
- if_info_t *if_info;
-};
-
-static void
-search_for_if_cb(gpointer data, gpointer user_data)
-{
- struct search_user_data *search_user_data = user_data;
- if_info_t *if_info = data;
-
- if (strcmp(if_info->name, search_user_data->name) == 0)
- search_user_data->if_info = if_info;
-}
-
-GList *
-get_interface_list(int *err, char **err_str)
-{
- GList *il = NULL;
- gint nonloopback_pos = 0;
- struct ifreq *ifr, *last;
- struct ifconf ifc;
- struct ifreq ifrflags;
- int sock = socket(AF_INET, SOCK_DGRAM, 0);
- struct search_user_data user_data;
- pcap_t *pch;
- int len, lastlen;
- char *buf;
- if_info_t *if_info;
- char errbuf[PCAP_ERRBUF_SIZE];
- gboolean loopback;
-
- if (sock < 0) {
- *err = CANT_GET_INTERFACE_LIST;
- if (err_str != NULL) {
- *err_str = g_strdup_printf(
- "Can't get list of interfaces: error opening socket: %s",
- g_strerror(errno));
- }
- return NULL;
- }
-
- /*
- * This code came from: W. Richard Stevens: "UNIX Network Programming",
- * Networking APIs: Sockets and XTI, Vol 1, page 434.
- */
- lastlen = 0;
- len = 100 * sizeof(struct ifreq);
- for ( ; ; ) {
- buf = g_malloc(len);
- ifc.ifc_len = len;
- ifc.ifc_buf = buf;
- memset (buf, 0, len);
- if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) {
- if (errno != EINVAL || lastlen != 0) {
- if (err_str != NULL) {
- *err_str = g_strdup_printf(
- "Can't get list of interfaces: SIOCGIFCONF ioctl error: %s",
- g_strerror(errno));
- }
- goto fail;
- }
- } else {
- if ((unsigned int) ifc.ifc_len < sizeof(struct ifreq)) {
- if (err_str != NULL) {
- *err_str = g_strdup(
- "Can't get list of interfaces: SIOCGIFCONF ioctl gave too small return buffer");
- }
- goto fail;
- }
- if (ifc.ifc_len == lastlen)
- break; /* success, len has not changed */
- lastlen = ifc.ifc_len;
- }
- len += 10 * sizeof(struct ifreq); /* increment */
- g_free(buf);
- }
- ifr = (struct ifreq *) ifc.ifc_req;
- last = (struct ifreq *) ((char *) ifr + ifc.ifc_len);
- while (ifr < last) {
- /*
- * Skip entries that begin with "dummy", or that include
- * a ":" (the latter are Solaris virtuals).
- */
- if (strncmp(ifr->ifr_name, "dummy", 5) == 0 ||
- strchr(ifr->ifr_name, ':') != NULL)
- goto next;
-
- /*
- * If we already have this interface name on the list,
- * don't add it, but, if we don't already have an IP
- * address for it, add that address (SIOCGIFCONF returns,
- * at least on BSD-flavored systems, one entry per
- * interface *address*; if an interface has multiple
- * addresses, we get multiple entries for it).
- */
- user_data.name = ifr->ifr_name;
- user_data.if_info = NULL;
- g_list_foreach(il, search_for_if_cb, &user_data);
- if (user_data.if_info != NULL) {
- if_info_add_address(user_data.if_info, &ifr->ifr_addr);
- goto next;
- }
-
- /*
- * Get the interface flags.
- */
- memset(&ifrflags, 0, sizeof ifrflags);
- g_strlcpy(ifrflags.ifr_name, ifr->ifr_name,
- sizeof ifrflags.ifr_name);
- if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifrflags) < 0) {
- if (errno == ENXIO)
- goto next;
- if (err_str != NULL) {
- *err_str = g_strdup_printf(
- "Can't get list of interfaces: SIOCGIFFLAGS error getting flags for interface %s: %s",
- ifr->ifr_name, g_strerror(errno));
- }
- goto fail;
- }
-
- /*
- * Skip interfaces that aren't up.
- */
- if (!(ifrflags.ifr_flags & IFF_UP))
- goto next;
-
- /*
- * Skip interfaces that we can't open with "libpcap".
- * Open with the minimum packet size - it appears that the
- * IRIX SIOCSNOOPLEN "ioctl" may fail if the capture length
- * supplied is too large, rather than just truncating it.
- */
- pch = pcap_open_live(ifr->ifr_name, MIN_PACKET_SIZE, 0, 0,
- errbuf);
- if (pch == NULL)
- goto next;
- pcap_close(pch);
-
- /*
- * If it's a loopback interface, add it at the end of the
- * list, otherwise add it after the last non-loopback
- * interface, so all loopback interfaces go at the end - we
- * don't want a loopback interface to be the default capture
- * device unless there are no non-loopback devices.
- */
- loopback = ((ifrflags.ifr_flags & IFF_LOOPBACK) ||
- strncmp(ifr->ifr_name, "lo", 2) == 0);
- if_info = if_info_new(ifr->ifr_name, NULL, loopback);
- if_info_add_address(if_info, &ifr->ifr_addr);
- if (loopback)
- il = g_list_append(il, if_info);
- else {
- il = g_list_insert(il, if_info, nonloopback_pos);
- /*
- * Insert the next non-loopback interface after this
- * one.
- */
- nonloopback_pos++;
- }
-
- next:
-#ifdef HAVE_SA_LEN
- ifr = (struct ifreq *) ((char *) ifr +
- (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_addr) ?
- ifr->ifr_addr.sa_len : sizeof(ifr->ifr_addr)) +
- IFNAMSIZ);
-#else
- ifr = (struct ifreq *) ((char *) ifr + sizeof(struct ifreq));
-#endif
- }
-
-#ifdef linux
- /*
- * OK, maybe we have support for the "any" device, to do a cooked
- * capture on all interfaces at once.
- * Try opening it and, if that succeeds, add it to the end of
- * the list of interfaces.
- */
- pch = pcap_open_live("any", MIN_PACKET_SIZE, 0, 0, errbuf);
- if (pch != NULL) {
- /*
- * It worked; we can use the "any" device.
- */
- if_info = if_info_new("any",
- "Pseudo-device that captures on all interfaces", FALSE);
- il = g_list_insert(il, if_info, -1);
- pcap_close(pch);
- }
-#endif
-
- g_free(ifc.ifc_buf);
- close(sock);
-
- if (il == NULL) {
- /*
- * No interfaces found.
- */
- *err = NO_INTERFACES_FOUND;
- if (err_str != NULL)
- *err_str = NULL;
- }
- return il;
-
-fail:
- if (il != NULL)
- free_interface_list(il);
- g_free(ifc.ifc_buf);
- close(sock);
- *err = CANT_GET_INTERFACE_LIST;
- return NULL;
-}
-#endif /* HAVE_PCAP_FINDALLDEVS */
-
-/*
- * Get an error message string for a CANT_GET_INTERFACE_LIST error from
- * "get_interface_list()".
- */
-gchar *
-cant_get_if_list_error_message(const char *err_str)
-{
- return g_strdup_printf("Can't get list of interfaces: %s", err_str);
-}
-
-/*
- * Append the version of libpcap with which we were compiled to a GString.
- */
-void
-get_compiled_pcap_version(GString *str)
-{
- /*
- * NOTE: in *some* flavors of UN*X, the data from a shared
- * library might be linked into executable images that are
- * linked with that shared library, in which case you could
- * look at pcap_version[] to get the version with which
- * the program was compiled.
- *
- * In other flavors of UN*X, that doesn't happen, so
- * pcap_version[] gives you the version the program is
- * running with, not the version it was built with, and,
- * in at least some of them, if the length of a data item
- * referred to by the executable - such as the pcap_version[]
- * string - isn't the same in the version of the library
- * with which the program was built and the version with
- * which it was run, the run-time linker will complain,
- * which is Not Good.
- *
- * So, for now, we just give up on reporting the version
- * of libpcap with which we were compiled.
- */
- g_string_append(str, "with libpcap");
-}
-
-/*
- * Append the version of libpcap with which we we're running to a GString.
- */
-void
-get_runtime_pcap_version(GString *str)
-{
- g_string_append_printf(str, "with ");
-#ifdef HAVE_PCAP_LIB_VERSION
- g_string_append(str, pcap_lib_version());
-#else
- g_string_append(str, "libpcap (version unknown)");
-#endif
-}
-
-#else /* HAVE_LIBPCAP */
-
-/*
- * Append an indication that we were not compiled with libpcap
- * to a GString.
- */
-void
-get_compiled_pcap_version(GString *str)
-{
- g_string_append(str, "without libpcap");
-}
-
-/*
- * Don't append anything, as we weren't even compiled to use WinPcap.
- */
-void
-get_runtime_pcap_version(GString *str _U_)
-{
-}
-
-#endif /* HAVE_LIBPCAP */