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/*
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* Copyright (C) 2013 Nikos Mavrogiannopoulos
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*
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* This file is part of GnuTLS.
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*
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* GnuTLS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuTLS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 GnuTLS; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_WIN32) || !defined(ENABLE_ALPN)
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int main(int argc, char **argv)
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{
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exit(77);
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}
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#else
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#include <string.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/dtls.h>
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#include "utils.h"
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static void terminate(void);
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/* This program tests the rehandshake in DTLS
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*/
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static void server_log_func(int level, const char *str)
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{
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fprintf(stderr, "server|<%d>| %s", level, str);
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}
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static void client_log_func(int level, const char *str)
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{
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fprintf(stderr, "client|<%d>| %s", level, str);
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}
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/* These are global */
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static pid_t child;
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/* A very basic DTLS client, with anonymous authentication, that negotiates SRTP
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*/
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static void client(int fd, const char *protocol0, const char *protocol2, const char *protocol1)
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{
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gnutls_session_t session;
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int ret;
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gnutls_datum_t proto;
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gnutls_anon_client_credentials_t anoncred;
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/* Need to enable anonymous KX specifically. */
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global_init();
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if (debug) {
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gnutls_global_set_log_function(client_log_func);
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gnutls_global_set_log_level(4711);
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}
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gnutls_anon_allocate_client_credentials(&anoncred);
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/* Initialize TLS session
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*/
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gnutls_init(&session, GNUTLS_CLIENT);
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/* Use default priorities */
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gnutls_priority_set_direct(session,
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"NONE:+VERS-TLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
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NULL);
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if (protocol1) {
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gnutls_datum_t t[3];
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t[0].data = (void *) protocol0;
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t[0].size = strlen(protocol0);
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t[1].data = (void *) protocol1;
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t[1].size = strlen(protocol1);
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t[2].data = (void *) protocol2;
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t[2].size = strlen(protocol2);
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ret = gnutls_alpn_set_protocols(session, t, 3, 0);
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if (ret < 0) {
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gnutls_perror(ret);
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exit(1);
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}
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}
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/* put the anonymous credentials to the current session
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*/
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gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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gnutls_transport_set_int(session, fd);
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/* Perform the TLS handshake
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*/
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do {
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ret = gnutls_handshake(session);
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}
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while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
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if (ret < 0) {
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fail("client: Handshake failed\n");
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gnutls_perror(ret);
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exit(1);
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} else {
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if (debug)
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success("client: Handshake was completed\n");
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}
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if (debug)
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success("client: TLS version is: %s\n",
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gnutls_protocol_get_name
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(gnutls_protocol_get_version(session)));
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ret = gnutls_alpn_get_selected_protocol(session, &proto);
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if (ret < 0) {
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gnutls_perror(ret);
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exit(1);
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}
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if (debug) {
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fprintf(stderr, "selected protocol: %.*s\n",
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(int) proto.size, proto.data);
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}
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gnutls_bye(session, GNUTLS_SHUT_WR);
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close(fd);
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gnutls_deinit(session);
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gnutls_anon_free_client_credentials(anoncred);
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gnutls_global_deinit();
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}
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static void terminate(void)
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{
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int status;
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kill(child, SIGTERM);
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wait(&status);
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exit(1);
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}
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static void server(int fd, const char *protocol1, const char *protocol2)
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{
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int ret;
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gnutls_session_t session;
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gnutls_anon_server_credentials_t anoncred;
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gnutls_datum_t t[2];
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gnutls_datum_t selected;
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/* this must be called once in the program
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*/
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global_init();
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if (debug) {
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gnutls_global_set_log_function(server_log_func);
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gnutls_global_set_log_level(4711);
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}
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gnutls_anon_allocate_server_credentials(&anoncred);
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gnutls_init(&session, GNUTLS_SERVER);
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/* avoid calling all the priority functions, since the defaults
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* are adequate.
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*/
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gnutls_priority_set_direct(session,
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"NONE:+VERS-TLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
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NULL);
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t[0].data = (void *) protocol1;
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t[0].size = strlen(protocol1);
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t[1].data = (void *) protocol2;
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t[1].size = strlen(protocol2);
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ret = gnutls_alpn_set_protocols(session, t, 2, 0);
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if (ret < 0) {
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gnutls_perror(ret);
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exit(1);
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}
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gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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gnutls_transport_set_int(session, fd);
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do {
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ret = gnutls_handshake(session);
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}
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while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
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if (ret < 0) {
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close(fd);
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gnutls_deinit(session);
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fail("server: Handshake has failed (%s)\n\n",
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gnutls_strerror(ret));
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terminate();
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}
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if (debug)
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success("server: Handshake was completed\n");
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if (debug)
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success("server: TLS version is: %s\n",
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gnutls_protocol_get_name
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(gnutls_protocol_get_version(session)));
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ret = gnutls_alpn_get_selected_protocol(session, &selected);
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if (ret < 0) {
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gnutls_perror(ret);
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exit(1);
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}
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if (debug) {
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success("Protocol: %.*s\n", (int) selected.size, selected.data);
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}
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if (selected.size != strlen(protocol1) || memcmp(selected.data, protocol1, selected.size) != 0) {
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fail("did not select the expected protocol (selected %.*s, expected %s)\n", selected.size, selected.data, protocol1);
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exit(1);
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}
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/* do not wait for the peer to close the connection.
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*/
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gnutls_bye(session, GNUTLS_SHUT_WR);
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close(fd);
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gnutls_deinit(session);
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gnutls_anon_free_server_credentials(anoncred);
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gnutls_global_deinit();
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if (debug)
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success("server: finished\n");
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}
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static void start(const char *p1, const char *p2)
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{
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int fd[2];
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int ret;
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ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
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if (ret < 0) {
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perror("socketpair");
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exit(1);
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}
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child = fork();
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if (child < 0) {
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perror("fork");
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fail("fork");
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exit(1);
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}
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if (child) {
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int status;
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/* parent */
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server(fd[0], p1, p2);
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wait(&status);
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check_wait_status(status);
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} else {
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close(fd[0]);
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client(fd[1], "unknown/1.4", p2, p1);
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exit(0);
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}
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}
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void doit(void)
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{
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start("h2", "http/1.1");
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start("spdy/2", "spdy/3");
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start("spdy/3", "spdy/2");
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}
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#endif /* _WIN32 */
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