natdiscovery: basic nat maping bahavior discovery according rfc5780
This commit is contained in:
Mészáros Mihály
parent
a5a16ae55e
commit
1dc0d21289
11
Makefile.in
11
Makefile.in
@ -34,7 +34,7 @@ SERVERAPP_HEADERS = src/apps/relay/userdb.h src/apps/relay/tls_listener.h src/ap
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SERVERAPP_MODS = src/apps/relay/mainrelay.c src/apps/relay/netengine.c src/apps/relay/libtelnet.c src/apps/relay/turn_admin_server.c src/apps/relay/userdb.c src/apps/relay/tls_listener.c src/apps/relay/dtls_listener.c ${HIREDIS_MODS} ${USERDB_MODS}
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SERVERAPP_DEPS = ${SERVERTURN_MODS} ${SERVERTURN_DEPS} ${SERVERAPP_MODS} ${SERVERAPP_HEADERS} ${COMMON_DEPS} ${IMPL_DEPS} lib/libturnclient.a
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TURN_BUILD_RESULTS = bin/turnutils_stunclient bin/turnutils_rfc5769check bin/turnutils_uclient bin/turnserver bin/turnutils_peer lib/libturnclient.a include/turn/ns_turn_defs.h sqlite_empty_db
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TURN_BUILD_RESULTS = bin/turnutils_natdiscovery bin/turnutils_stunclient bin/turnutils_rfc5769check bin/turnutils_uclient bin/turnserver bin/turnutils_peer lib/libturnclient.a include/turn/ns_turn_defs.h sqlite_empty_db
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all: ${TURN_BUILD_RESULTS}
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@ -54,6 +54,11 @@ bin/turnutils_uclient: ${COMMON_DEPS} src/apps/uclient/session.h lib/libturnclie
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${MKBUILDDIR} bin
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${CC} ${CPPFLAGS} ${CFLAGS} src/apps/uclient/uclient.c src/apps/uclient/startuclient.c src/apps/uclient/mainuclient.c ${COMMON_MODS} -o $@ -Llib -lturnclient -Llib ${LDFLAGS}
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bin/turnutils_natdiscovery: ${COMMON_DEPS} lib/libturnclient.a src/apps/natdiscovery/natdiscovery.c
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pwd
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${MKBUILDDIR} bin
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${CC} ${CPPFLAGS} ${CFLAGS} src/apps/natdiscovery/natdiscovery.c ${COMMON_MODS} -o $@ -Llib -lturnclient -Llib ${LDFLAGS}
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bin/turnutils_stunclient: ${COMMON_DEPS} lib/libturnclient.a src/apps/stunclient/stunclient.c
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pwd
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${MKBUILDDIR} bin
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@ -125,11 +130,13 @@ install: all ${MAKE_DEPS}
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${INSTALL_PROGRAM} bin/turnutils_uclient ${DESTDIR}${BINDIR}
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${INSTALL_PROGRAM} bin/turnutils_peer ${DESTDIR}${BINDIR}
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${INSTALL_PROGRAM} bin/turnutils_stunclient ${DESTDIR}${BINDIR}
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${INSTALL_PROGRAM} bin/turnutils_natdiscovery ${DESTDIR}${BINDIR}
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${INSTALL_MAN} man/man1/turnserver.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnadmin.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnutils.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnutils_uclient.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnutils_stunclient.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnutils_natdiscovery.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/turnutils_peer.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_MAN} man/man1/coturn.1 ${DESTDIR}${MANPREFIX}/man/man1/
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${INSTALL_STATIC_LIB} lib/libturnclient.a ${DESTDIR}${LIBDIR}
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@ -169,11 +176,13 @@ deinstall: ${MAKE_DEPS}
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${RMCMD} ${DESTDIR}${BINDIR}/turnutils_peer
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${RMCMD} ${DESTDIR}${BINDIR}/turnutils_uclient
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${RMCMD} ${DESTDIR}${BINDIR}/turnutils_stunclient
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${RMCMD} ${DESTDIR}${BINDIR}/turnutils_natdiscovery
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnserver.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnadmin.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnutils.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnutils_uclient.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnutils_stunclient.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnutils_natdiscovery.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/turnutils_peer.1
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${RMCMD} ${DESTDIR}${MANPREFIX}/man/man1/coturn.1
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${RMCMD} ${DESTDIR}${LIBDIR}/libturnclient.a
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452
src/apps/natdiscovery/natdiscovery.c
Normal file
452
src/apps/natdiscovery/natdiscovery.c
Normal file
@ -0,0 +1,452 @@
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/*
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* Copyright (C) 2011, 2012, 2013 Citrix Systems
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <err.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "ns_turn_utils.h"
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#include "apputils.h"
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#include "stun_buffer.h"
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#ifdef __cplusplus
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#include "TurnMsgLib.h"
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#endif
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////////////////////////////////////////////////////
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static int udp_fd = -1;
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static ioa_addr real_local_addr;
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static int counter = 0;
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#ifdef __cplusplus
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static int run_stunclient(ioa_addr *remote_addr, ioa_addr *reflexive_addr, ioa_addr *other_addr, int *port, int *rfc5780, int response_port, int change_ip, int change_port, int padding)
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{
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if (response_port >= 0) {
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addr_set_port(&real_local_addr, response_port);
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}
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udp_fd = socket(remote_addr->ss.sa_family, SOCK_DGRAM, 0);
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if (udp_fd < 0)
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err(-1, NULL);
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if (!addr_any(&real_local_addr)) {
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if (addr_bind(udp_fd, &real_local_addr,0,1,UDP_SOCKET) < 0)
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err(-1, NULL);
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}
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turn::StunMsgRequest req(STUN_METHOD_BINDING);
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req.constructBindingRequest();
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if (response_port >= 0) {
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turn::StunAttrResponsePort rpa;
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rpa.setResponsePort((u16bits)response_port);
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try {
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req.addAttr(rpa);
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} catch(turn::WrongStunAttrFormatException &ex1) {
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printf("Wrong rp attr format\n");
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exit(-1);
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} catch(turn::WrongStunBufferFormatException &ex2) {
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printf("Wrong stun buffer format (1)\n");
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exit(-1);
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} catch(...) {
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printf("Wrong something (1)\n");
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exit(-1);
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}
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}
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if (change_ip || change_port) {
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turn::StunAttrChangeRequest cra;
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cra.setChangeIp(change_ip);
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cra.setChangePort(change_port);
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try {
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req.addAttr(cra);
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} catch(turn::WrongStunAttrFormatException &ex1) {
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printf("Wrong cr attr format\n");
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exit(-1);
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} catch(turn::WrongStunBufferFormatException &ex2) {
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printf("Wrong stun buffer format (2)\n");
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exit(-1);
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} catch(...) {
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printf("Wrong something (2)\n");
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exit(-1);
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}
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}
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if (padding) {
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turn::StunAttrPadding pa;
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pa.setPadding(1500);
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try {
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req.addAttr(pa);
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} catch(turn::WrongStunAttrFormatException &ex1) {
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printf("Wrong p attr format\n");
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exit(-1);
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} catch(turn::WrongStunBufferFormatException &ex2) {
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printf("Wrong stun buffer format (3)\n");
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exit(-1);
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} catch(...) {
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printf("Wrong something (3)\n");
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exit(-1);
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}
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}
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{
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int len = 0;
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int slen = get_ioa_addr_len(remote_addr);
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do {
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len = sendto(udp_fd, req.getRawBuffer(), req.getSize(), 0, (struct sockaddr*) remote_addr, (socklen_t) slen);
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} while (len < 0 && ((errno == EINTR) || (errno == ENOBUFS) || (errno == EAGAIN)));
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if (len < 0)
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err(-1, NULL);
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}
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if (addr_get_from_sock(udp_fd, &real_local_addr) < 0) {
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printf("%s: Cannot get address from local socket\n", __FUNCTION__);
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} else {
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*port = addr_get_port(&real_local_addr);
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}
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{
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int len = 0;
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stun_buffer buf;
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u08bits *ptr = buf.buf;
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int recvd = 0;
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const int to_recv = sizeof(buf.buf);
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do {
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len = recv(udp_fd, ptr, to_recv - recvd, 0);
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if (len > 0) {
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recvd += len;
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ptr += len;
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break;
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}
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} while (len < 0 && (errno == EINTR));
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if (recvd > 0)
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len = recvd;
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buf.len = len;
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try {
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turn::StunMsgResponse res(buf.buf, sizeof(buf.buf), (size_t)buf.len, true);
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if (res.isCommand()) {
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if(res.isSuccess()) {
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if (res.isBindingResponse()) {
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turn::StunAttrIterator iter(res,STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS);
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if (!iter.eof()) {
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turn::StunAttrAddr addr(iter);
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addr.getAddr(*reflexive_addr);
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turn::StunAttrIterator iter1(res,STUN_ATTRIBUTE_OTHER_ADDRESS);
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if (!iter1.eof()) {
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*rfc5780 = 1;
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printf("\n========================================\n");
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printf("RFC 5780 response %d\n",++counter);
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turn::StunAttrAddr addr1(iter1);
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addr1.getAddr(*other_addr);
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turn::StunAttrIterator iter2(res,STUN_ATTRIBUTE_RESPONSE_ORIGIN);
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if (!iter2.eof()) {
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ioa_addr response_origin;
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turn::StunAttrAddr addr2(iter2);
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addr2.getAddr(response_origin);
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addr_debug_print(1, &response_origin, "Response origin: ");
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}
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addr_debug_print(1, other_addr, "Other addr: ");
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}
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addr_debug_print(1, &reflexive_addr, "UDP reflexive addr");
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} else {
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printf("Cannot read the response\n");
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}
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} else {
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printf("Wrong type of response\n");
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}
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} else {
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int err_code = res.getError();
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std::string reason = res.getReason();
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printf("The response is an error %d (%s)\n", err_code, reason.c_str());
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}
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} else {
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printf("The response is not a reponse message\n");
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}
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} catch(...) {
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printf("The response is not a well formed STUN message\n");
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}
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}
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close(udp_fd);
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return 0;
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}
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#else
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static int run_stunclient(ioa_addr *remote_addr, ioa_addr *reflexive_addr, ioa_addr *other_addr, int *port, int *rfc5780, int response_port, int change_ip, int change_port, int padding)
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{
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stun_buffer buf;
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udp_fd = socket(remote_addr->ss.sa_family, CLIENT_DGRAM_SOCKET_TYPE, CLIENT_DGRAM_SOCKET_PROTOCOL);
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if (udp_fd < 0)
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err(-1, NULL);
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if (!addr_any(&real_local_addr)) {
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if (response_port >= 0) {
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addr_set_port(&real_local_addr, response_port);
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}
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if (addr_bind(udp_fd, &real_local_addr,0,1,UDP_SOCKET) < 0) {
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err(-1, NULL);
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}
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}
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stun_prepare_binding_request(&buf);
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if (response_port >= 0) {
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stun_attr_add_response_port_str((u08bits*) (buf.buf), (size_t*) &(buf.len), (u16bits) response_port);
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}
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if (change_ip || change_port) {
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stun_attr_add_change_request_str((u08bits*) buf.buf, (size_t*) &(buf.len), change_ip, change_port);
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}
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if (padding) {
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if(stun_attr_add_padding_str((u08bits*) buf.buf, (size_t*) &(buf.len), 1500)<0) {
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printf("%s: ERROR: Cannot add padding\n",__FUNCTION__);
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}
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}
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{
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int len = 0;
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int slen = get_ioa_addr_len(remote_addr);
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do {
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len = sendto(udp_fd, buf.buf, buf.len, 0, (struct sockaddr*) remote_addr, (socklen_t) slen);
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} while (len < 0 && ((errno == EINTR) || (errno == ENOBUFS) || (errno == EAGAIN)));
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if (len < 0)
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err(-1, NULL);
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}
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if (addr_get_from_sock(udp_fd, &real_local_addr) < 0) {
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printf("%s: Cannot get address from local socket\n", __FUNCTION__);
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} else {
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*port = addr_get_port(&real_local_addr);
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}
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{
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int len = 0;
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u08bits *ptr = buf.buf;
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int recvd = 0;
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const int to_recv = sizeof(buf.buf);
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do {
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len = recv(udp_fd, ptr, to_recv - recvd, 0);
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if (len > 0) {
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recvd += len;
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ptr += len;
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break;
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}
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} while (len < 0 && ((errno == EINTR) || (errno == EAGAIN)));
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if (recvd > 0)
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len = recvd;
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buf.len = len;
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if (stun_is_command_message(&buf)) {
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if (stun_is_response(&buf)) {
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if (stun_is_success_response(&buf)) {
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if (stun_is_binding_response(&buf)) {
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addr_set_any(reflexive_addr);
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if (stun_attr_get_first_addr(&buf, STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS, reflexive_addr, NULL) >= 0) {
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stun_attr_ref sar = stun_attr_get_first_by_type_str(buf.buf, buf.len, STUN_ATTRIBUTE_OTHER_ADDRESS);
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if (sar) {
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*rfc5780 = 1;
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printf("\n========================================\n");
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printf("RFC 5780 response %d\n",++counter);
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stun_attr_get_addr_str((u08bits *) buf.buf, (size_t) buf.len, sar, other_addr, NULL);
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sar = stun_attr_get_first_by_type_str(buf.buf, buf.len, STUN_ATTRIBUTE_RESPONSE_ORIGIN);
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if (sar) {
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ioa_addr response_origin;
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stun_attr_get_addr_str((u08bits *) buf.buf, (size_t) buf.len, sar, &response_origin, NULL);
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addr_debug_print(1, &response_origin, "Response origin: ");
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}
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addr_debug_print(1, other_addr, "Other addr: ");
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}
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addr_debug_print(1, reflexive_addr, "UDP reflexive addr");
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} else {
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printf("Cannot read the response\n");
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}
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} else {
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printf("Wrong type of response\n");
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}
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} else {
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int err_code = 0;
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u08bits err_msg[1025] = "\0";
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size_t err_msg_size = sizeof(err_msg);
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if (stun_is_error_response(&buf, &err_code, err_msg, err_msg_size)) {
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printf("The response is an error %d (%s)\n", err_code, (char*) err_msg);
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} else {
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printf("The response is an unrecognized error\n");
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}
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}
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} else {
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printf("The response is not a reponse message\n");
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}
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} else {
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printf("The response is not a STUN message\n");
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}
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}
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socket_closesocket(udp_fd);
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return 0;
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}
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#endif
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//////////////// local definitions /////////////////
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static char Usage[] =
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"Usage: stunclient [options] address\n"
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"Options:\n"
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" -p STUN server port (Default: 3478)\n"
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" -L Local address to use (optional)\n"
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" -f Force RFC 5780 processing\n";
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//////////////////////////////////////////////////
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int main(int argc, char **argv)
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{
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int port = DEFAULT_STUN_PORT;
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char local_addr[256]="\0";
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int c=0;
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int forceRfc5780 = 0;
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ioa_addr other_addr, reflexive_addr, tmp_addr, remote_addr;
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||||
|
||||
set_logfile("stdout");
|
||||
set_system_parameters(0);
|
||||
|
||||
ns_bzero(local_addr, sizeof(local_addr));
|
||||
addr_set_any(&remote_addr);
|
||||
addr_set_any(&other_addr);
|
||||
addr_set_any(&reflexive_addr);
|
||||
addr_set_any(&tmp_addr);
|
||||
|
||||
|
||||
while ((c = getopt(argc, argv, "p:L:f")) != -1) {
|
||||
switch(c) {
|
||||
case 'f':
|
||||
forceRfc5780 = 1;
|
||||
break;
|
||||
case 'p':
|
||||
port = atoi(optarg);
|
||||
break;
|
||||
case 'L':
|
||||
STRCPY(local_addr, optarg);
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr,"%s\n", Usage);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
if(optind>=argc) {
|
||||
fprintf(stderr, "%s\n", Usage);
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
addr_set_any(&real_local_addr);
|
||||
|
||||
if(local_addr[0]) {
|
||||
if(make_ioa_addr((const u08bits*)local_addr, 0, &real_local_addr)<0) {
|
||||
err(-1,NULL);
|
||||
}
|
||||
}
|
||||
|
||||
int local_port = -1;
|
||||
int rfc5780 = 0;
|
||||
|
||||
if (make_ioa_addr((const u08bits*)argv[optind], port, &remote_addr) < 0)
|
||||
err(-1, NULL);
|
||||
|
||||
|
||||
run_stunclient(&remote_addr, &reflexive_addr, &other_addr, &local_port, &rfc5780,-1,0,0,0);
|
||||
if (addr_eq(&real_local_addr,&reflexive_addr)){
|
||||
printf("No NAT! (Endpoint Independent Mapping)");
|
||||
}
|
||||
if(rfc5780 || forceRfc5780) {
|
||||
if(!addr_any(&other_addr)){
|
||||
|
||||
addr_cpy(&tmp_addr, &reflexive_addr);
|
||||
|
||||
addr_cpy(&remote_addr, &other_addr);
|
||||
addr_set_port(&remote_addr, port);
|
||||
|
||||
run_stunclient(&remote_addr, &reflexive_addr, &other_addr, &local_port, &rfc5780,-1,0,0,0);
|
||||
|
||||
if(addr_eq(&tmp_addr,&reflexive_addr)){
|
||||
printf("NAT with Enpoint Independent Mapping!\n");
|
||||
} else {
|
||||
addr_cpy(&tmp_addr, &reflexive_addr);
|
||||
addr_cpy(&remote_addr, &other_addr);
|
||||
run_stunclient(&remote_addr, &reflexive_addr, &other_addr, &local_port, &rfc5780,-1,0,0,0);
|
||||
if(addr_eq(&tmp_addr,&reflexive_addr)){
|
||||
printf("NAT with Address Dependent Mapping!\n");
|
||||
} else {
|
||||
printf("NAT with Address and Port Dependent Mapping!\n");
|
||||
}
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
socket_closesocket(udp_fd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user