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/*
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* Copyright (C) 2015 Nikos Mavrogiannopoulos
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*
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* Author: 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(HAVE_LIBSECCOMP)
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int main()
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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 <signal.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/dtls.h>
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#include <assert.h>
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#include "cert-common.h"
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#include "utils.h"
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static void terminate(void);
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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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#define MAX_BUF 1024
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static ssize_t
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push(gnutls_transport_ptr_t tr, const void *data, size_t len)
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{
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int fd = (long int) tr;
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return send(fd, data, len, 0);
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}
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static void client(int fd, const char *prio)
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{
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int ret;
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char buffer[MAX_BUF + 1];
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gnutls_certificate_credentials_t xcred;
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gnutls_session_t session;
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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_certificate_allocate_credentials(&xcred);
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ret = disable_system_calls();
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if (ret < 0) {
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fprintf(stderr, "could not enable seccomp\n");
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exit(2);
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}
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/* Initialize TLS session
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*/
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gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_DATAGRAM);
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gnutls_dtls_set_mtu(session, 1500);
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gnutls_handshake_set_timeout(session, 20 * 1000);
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/* Use default priorities */
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assert(gnutls_priority_set_direct(session,
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prio,
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NULL) >= 0);
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gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
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gnutls_transport_set_int(session, fd);
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gnutls_transport_set_push_function(session, push);
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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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do {
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ret = gnutls_record_recv(session, buffer, sizeof(buffer)-1);
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} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
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if (ret == 0) {
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if (debug)
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success
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("client: Peer has closed the TLS connection\n");
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goto end;
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} else if (ret < 0) {
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fail("client: Error: %s\n", gnutls_strerror(ret));
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exit(1);
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}
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ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
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if (ret < 0) {
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fail("server: error in closing session: %s\n", gnutls_strerror(ret));
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}
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end:
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close(fd);
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gnutls_deinit(session);
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gnutls_certificate_free_credentials(xcred);
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gnutls_global_deinit();
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}
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/* These are global */
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pid_t child;
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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 *prio)
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{
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int ret;
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gnutls_certificate_credentials_t xcred;
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char buffer[MAX_BUF + 1];
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gnutls_session_t session;
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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_certificate_allocate_credentials(&xcred);
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ret = gnutls_certificate_set_x509_key_mem(xcred,
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&server_cert, &server_key,
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GNUTLS_X509_FMT_PEM);
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if (ret < 0)
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exit(1);
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gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
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gnutls_handshake_set_timeout(session, 20 * 1000);
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gnutls_dtls_set_mtu(session, 1500);
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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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assert(gnutls_priority_set_direct(session,
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prio,
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NULL)>=0);
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gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
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gnutls_transport_set_int(session, fd);
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gnutls_transport_set_push_function(session, push);
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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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/* see the Getting peer's information example */
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/* print_info(session); */
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memset(buffer, 1, sizeof(buffer));
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do {
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ret = gnutls_record_send(session, buffer, sizeof(buffer)-1);
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} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
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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: data sending 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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ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
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if (ret < 0) {
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fail("server: error in closing session: %s\n", gnutls_strerror(ret));
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}
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close(fd);
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gnutls_deinit(session);
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gnutls_certificate_free_credentials(xcred);
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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
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void run(const char *name, const char *prio)
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{
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int fd[2];
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int ret;
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success("testing seccomp with %s\n", name);
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signal(SIGPIPE, SIG_IGN);
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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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close(fd[1]);
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server(fd[0], prio);
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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], prio);
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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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run("dtls1.2", "NORMAL:-KX-ALL:+ECDHE-RSA:-VERS-ALL:+VERS-DTLS1.2");
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}
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#endif /* _WIN32 */
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