extcap: add local_interfaces_to_list() to wsutil.
This new function abstracts the creation of a list of the local interfaces that will be used by future extcaps to generate specific filters. Sshdump now uses it to create a pcap filter. Change-Id: I5b75a266f81104b3c9bcb3e51de246b7cc8785ce Reviewed-on: https://code.wireshark.org/review/14092 Reviewed-by: João Valverde <j@v6e.pt> Petri-Dish: João Valverde <j@v6e.pt> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Roland Knall <rknall@gmail.com>
This commit is contained in:
parent
5a66318272
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68d4ba212c
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@ -2380,6 +2380,7 @@ endif()
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if(BUILD_sshdump AND LIBSSH_FOUND)
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set(sshdump_LIBS
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wsutil
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${GLIB2_LIBRARIES}
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${CMAKE_DL_LIBS}
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${LIBSSH_LIBRARIES}
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@ -29,6 +29,7 @@ check_include_file("dlfcn.h" HAVE_DLFCN_H)
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check_include_file("fcntl.h" HAVE_FCNTL_H)
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check_include_file("getopt.h" HAVE_GETOPT_H)
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check_include_file("grp.h" HAVE_GRP_H)
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check_include_file("ifaddrs.h" HAVE_IFADDRS_H)
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check_include_file("inttypes.h" HAVE_INTTYPES_H)
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check_include_file("netinet/in.h" HAVE_NETINET_IN_H)
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check_include_file("netdb.h" HAVE_NETDB_H)
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@ -115,6 +116,7 @@ if(HAVE_GETOPT_LONG)
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endif()
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endif()
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check_function_exists("getprotobynumber" HAVE_GETPROTOBYNUMBER)
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check_function_exists("getifaddrs" HAVE_GETIFADDRS)
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check_function_exists("inet_aton" HAVE_INET_ATON)
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check_function_exists("inet_ntop" HAVE_INET_NTOP_PROTO)
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check_function_exists("inet_pton" HAVE_INET_PTON)
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@ -64,6 +64,12 @@
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/* Define if GeoIP supports IPv6 (GeoIP 1.4.5 and later) */
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#cmakedefine HAVE_GEOIP_V6 1
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/* Define to 1 if you have the <ifaddrs.h> header file. */
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#cmakedefine HAVE_IFADDRS_H 1
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/* Define to 1 if you have the `getifaddrs' function. */
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#cmakedefine HAVE_GETIFADDRS 1
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/* Define if LIBSSH support is enabled */
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#cmakedefine HAVE_LIBSSH 1
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@ -2647,6 +2647,7 @@ AC_CHECK_HEADERS(fcntl.h getopt.h grp.h inttypes.h netdb.h pwd.h unistd.h)
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AC_CHECK_HEADERS(sys/ioctl.h sys/param.h sys/socket.h sys/sockio.h sys/stat.h sys/time.h sys/types.h sys/utsname.h sys/wait.h)
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AC_CHECK_HEADERS(netinet/in.h)
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AC_CHECK_HEADERS(arpa/inet.h arpa/nameser.h)
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AC_CHECK_HEADERS(ifaddrs.h)
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#
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# On Linux, check for some additional headers, which we need as a
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@ -2998,6 +2999,7 @@ AC_SUBST(POPCOUNT_LO)
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AC_CHECK_FUNCS(getprotobynumber)
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AC_CHECK_FUNCS(issetugid)
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AC_CHECK_FUNCS(sysconf)
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AC_CHECK_FUNCS(getifaddrs)
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dnl blank for now, but will be used in future
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AC_SUBST(wireshark_SUBDIRS)
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@ -24,6 +24,8 @@
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#ifndef __EXTCAP_BASE_H__
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#define __EXTCAP_BASE_H__
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#include "config.h"
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#include <glib.h>
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#include <glib/gprintf.h>
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#include <stdlib.h>
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@ -65,6 +67,10 @@
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#define SOCKET_ERROR (-1)
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#define EXTCAP_BASE_OPTIONS_ENUM \
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EXTCAP_OPT_LIST_INTERFACES, \
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EXTCAP_OPT_VERSION, \
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@ -24,13 +24,13 @@
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#include "config.h"
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#include "extcap-base.h"
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#include <extcap/extcap-base.h>
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#include <wsutil/interface.h>
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#include <glib/gstdio.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <string.h>
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@ -39,17 +39,6 @@
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#include <fcntl.h>
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#include <libssh/libssh.h>
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#include "log.h"
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#if defined(__FreeBSD__) || defined(BSD) || defined(__APPLE__) || defined(__linux__)
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#define USE_GETIFADDRS 1
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#include <ifaddrs.h>
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#endif
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#ifndef STDERR_FILENO
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#define STDERR_FILENO 2
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#endif
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@ -106,7 +95,7 @@ static struct option longopts[] = {
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{ 0, 0, 0, 0}
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};
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static char* local_interfaces_to_filter(unsigned int remote_port);
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static char* interfaces_list_to_filter(GSList* if_list, const unsigned int remote_port);
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static void ssh_cleanup(ssh_session sshs, ssh_channel channel)
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{
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@ -249,6 +238,14 @@ static void ssh_loop_read(ssh_channel channel, int fd)
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return;
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}
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static char* local_interfaces_to_filter(const unsigned int remote_port)
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{
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GSList* interfaces = local_interfaces_to_list();
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char* filter = interfaces_list_to_filter(interfaces, remote_port);
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g_slist_free_full(interfaces, g_free);
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return filter;
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}
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static ssh_channel run_ssh_command(ssh_session sshs, const char* capture_bin, const char* iface, const char* cfilter,
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unsigned long int count)
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{
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@ -384,70 +381,23 @@ static void help(const char* binname)
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printf(" --remote-filter <filter>: a filter for remote capture (default: don't listen on local local interfaces IPs)\n");
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}
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static char* local_interfaces_to_filter(unsigned int remote_port)
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static char* interfaces_list_to_filter(GSList* interfaces, unsigned int remote_port)
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{
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char* filter = NULL;
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#ifdef USE_GETIFADDRS
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struct ifaddrs* ifap;
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struct ifaddrs* ifa;
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GString* interfaces;
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int family;
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char ip[INET6_ADDRSTRLEN];
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GString* filter = g_string_new(NULL);
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GSList* cur;
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if (getifaddrs(&ifap)) {
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goto end;
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if (!interfaces) {
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g_string_append_printf(filter, "not port %u", remote_port);
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} else {
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g_string_append_printf(filter, "not ((host %s", (char*)interfaces->data);
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cur = g_slist_next(interfaces);
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while (cur->next != NULL) {
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g_string_append_printf(filter, " or host %s", (char*)cur->data);
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cur = cur->next;
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}
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interfaces = g_string_new(NULL);
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for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
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if (ifa->ifa_addr == NULL)
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continue;
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family = ifa->ifa_addr->sa_family;
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memset(&ip, 0x0, INET6_ADDRSTRLEN);
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switch (family) {
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case AF_INET:
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{
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struct sockaddr_in *addr4 = (struct sockaddr_in *)ifa->ifa_addr;
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inet_ntop(family, (char *)&addr4->sin_addr, ip, sizeof(ip));
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break;
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g_string_append_printf(filter, ") and port %u)", remote_port);
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}
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case AF_INET6:
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{
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)ifa->ifa_addr;
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inet_ntop(family, (char *)&addr6->sin6_addr, ip, sizeof(ip));
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break;
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}
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default:
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break;
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}
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/* skip loopback addresses */
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if (!g_strcmp0(ip, "127.0.0.1") || !g_strcmp0(ip, "::1"))
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continue;
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if (*ip) {
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if (interfaces->len)
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g_string_append(interfaces, " or ");
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g_string_append_printf(interfaces, "host %s", ip);
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}
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}
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freeifaddrs(ifap);
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if (interfaces->len)
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filter = g_strdup_printf("not ((%s) and port %u)", interfaces->str, remote_port);
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g_string_free(interfaces, TRUE);
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end:
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#endif
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if (!filter)
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filter = g_strdup_printf("not port %u", remote_port);
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return filter;
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return g_string_free(filter, FALSE);
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}
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static int list_config(char *interface, unsigned int remote_port)
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@ -54,6 +54,7 @@ set(WSUTIL_FILES
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frequency-utils.c
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g711.c
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inet_addr.c
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interface.c
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jsmn.c
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md4.c
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md5.c
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@ -51,6 +51,7 @@ LIBWSUTIL_COMMON_SRC = \
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frequency-utils.c \
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g711.c \
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inet_addr.c \
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interface.c \
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jsmn.c \
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md4.c \
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md5.c \
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@ -102,6 +103,7 @@ libwsutil_nonrepl_INCLUDES = \
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frequency-utils.h \
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g711.h \
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inet_addr.h \
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interface.h \
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jsmn.h \
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md4.h \
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md5.h \
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@ -0,0 +1,106 @@
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/* interface.c
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* Utility functions to get infos from interfaces
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*
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* Copyright 2016, Dario Lombardo
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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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#include "interface.h"
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#include <string.h>
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#include <wsutil/inet_addr.h>
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_IFADDRS_H
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#include <ifaddrs.h>
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#endif
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GSList *local_interfaces_to_list(void)
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{
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GSList *interfaces = NULL;
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#ifdef HAVE_GETIFADDRS
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struct ifaddrs *ifap;
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struct ifaddrs *ifa;
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int family;
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char ip[INET6_ADDRSTRLEN];
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if (getifaddrs(&ifap)) {
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goto end;
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}
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interfaces = g_slist_alloc();
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for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
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if (ifa->ifa_addr == NULL)
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continue;
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family = ifa->ifa_addr->sa_family;
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memset(ip, 0x0, INET6_ADDRSTRLEN);
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switch (family) {
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case AF_INET:
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{
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struct sockaddr_in *addr4 = (struct sockaddr_in *)ifa->ifa_addr;
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ws_inet_ntop4(&addr4->sin_addr, ip, sizeof(ip));
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break;
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}
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case AF_INET6:
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{
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)ifa->ifa_addr;
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ws_inet_ntop6(&addr6->sin6_addr, ip, sizeof(ip));
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break;
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}
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default:
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break;
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}
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/* skip loopback addresses */
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if (!g_strcmp0(ip, "127.0.0.1") || !g_strcmp0(ip, "::1"))
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continue;
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if (*ip) {
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interfaces = g_slist_prepend(interfaces, g_strdup(ip));
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}
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}
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end:
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#endif /* HAVE_GETIFADDRS */
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return interfaces;
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=4 tabstop=4 noexpandtab:
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* :indentSize=4:tabSize=4:noTabs=false:
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*/
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@ -0,0 +1,48 @@
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/* interface.c
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* Utility functions to get infos from interfaces
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*
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* Copyright 2016, Dario Lombardo
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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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#ifndef _INTERFACE_H
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#define _INTERFACE_H
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#include <glib.h>
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#include "ws_symbol_export.h"
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/* Return a list of IPv4/IPv6 addresses for local interfaces */
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WS_DLL_PUBLIC
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GSList* local_interfaces_to_list(void);
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#endif
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=4 tabstop=4 noexpandtab:
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* :indentSize=4:tabSize=4:noTabs=false:
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*/
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