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/*
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* Copyright (C) 2013-2015 Nikos Mavrogiannopoulos
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* Copyright (C) 2015 Red Hat, Inc.
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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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/* This checks the proper behavior of the client when
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* invalid data are sent by the server in the hello verify
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* request.
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*/
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#if defined(_WIN32)
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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 <sys/select.h>
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#include <errno.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 "utils.h"
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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)
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{
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int ret;
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gnutls_anon_client_credentials_t anoncred;
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gnutls_session_t session;
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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 | 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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gnutls_priority_set_direct(session,
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"NONE:+VERS-DTLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
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NULL);
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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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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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success("client: Handshake failed as expected\n");
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gnutls_perror(ret);
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goto exit;
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} else {
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fail("client: Handshake completed unexpectedly\n");
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goto exit;
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}
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exit:
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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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/* These are global */
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pid_t child;
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#define CLI_ADDR (void*)"test"
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#define CLI_ADDR_LEN 4
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static
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ssize_t recv_timeout(int sockfd, void *buf, size_t len, unsigned flags, unsigned sec)
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{
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int ret;
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struct timeval tv;
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fd_set set;
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tv.tv_sec = sec;
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tv.tv_usec = 0;
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FD_ZERO(&set);
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FD_SET(sockfd, &set);
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do {
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ret = select(sockfd + 1, &set, NULL, NULL, &tv;;
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} while (ret == -1 && errno == EINTR);
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if (ret == -1 || ret == 0) {
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errno = ETIMEDOUT;
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return -1;
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}
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return recv(sockfd, buf, len, flags);
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}
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#define SERV_TIMEOUT 30
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static void server(int fd)
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{
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int ret, csend = 0;
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gnutls_anon_server_credentials_t anoncred;
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char buffer[MAX_BUF + 1];
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gnutls_datum_t cookie_key;
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gnutls_dtls_prestate_st prestate;
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gnutls_session_t session;
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unsigned try = 0;
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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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ret = gnutls_key_generate(&cookie_key, GNUTLS_COOKIE_KEY_SIZE);
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if (ret < 0) {
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fail("Cannot generate key: %s\n", gnutls_strerror(ret));
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exit(1);
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}
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gnutls_anon_allocate_server_credentials(&anoncred);
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gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
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gnutls_handshake_set_timeout(session, SERV_TIMEOUT * 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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gnutls_priority_set_direct(session,
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"NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
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NULL);
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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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gnutls_transport_set_push_function(session, push);
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for (;;) {
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ret = recv_timeout(fd, buffer, sizeof(buffer), MSG_PEEK, SERV_TIMEOUT);
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if (ret < 0) {
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if (try != 0) {
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success("Server was terminated as expected!\n");
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goto exit;
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} else {
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fail("Error receiving first message\n");
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exit(1);
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}
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}
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try++;
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memset(&prestate, 0, sizeof(prestate));
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prestate.record_seq = 105791312;
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prestate.hsk_write_seq = 67166359;
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ret =
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gnutls_dtls_cookie_verify(&cookie_key, CLI_ADDR,
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CLI_ADDR_LEN, buffer, ret,
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&prestate);
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if (ret < 0) { /* cookie not valid */
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if (debug)
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success("Sending hello verify request\n");
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ret =
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gnutls_dtls_cookie_send(&cookie_key, CLI_ADDR,
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CLI_ADDR_LEN,
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&prestate,
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(gnutls_transport_ptr_t)
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(long) fd, push);
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if (ret < 0) {
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fail("Cannot send data\n");
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exit(1);
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}
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/* discard peeked data */
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recv_timeout(fd, buffer, sizeof(buffer), 0, SERV_TIMEOUT);
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csend++;
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if (csend > 2) {
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fail("too many cookies sent\n");
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exit(1);
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}
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continue;
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}
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/* success */
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break;
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}
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fail("Shouldn't have reached here\n");
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exit(1);
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exit:
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gnutls_deinit(session);
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gnutls_free(cookie_key.data);
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gnutls_anon_free_server_credentials(anoncred);
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gnutls_global_deinit();
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}
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void doit(void)
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{
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int fd[2];
|
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int ret;
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signal(SIGPIPE, SIG_IGN);
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ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
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aea12f |
if (ret < 0) {
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aea12f |
perror("socketpair");
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aea12f |
exit(1);
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aea12f |
}
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aea12f |
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child = fork();
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aea12f |
if (child < 0) {
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aea12f |
perror("fork");
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aea12f |
fail("fork");
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aea12f |
exit(1);
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aea12f |
}
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aea12f |
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if (child) {
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aea12f |
int status;
|
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Packit |
aea12f |
/* parent */
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client(fd[0]);
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aea12f |
wait(&status);
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aea12f |
check_wait_status(status);
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aea12f |
} else {
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aea12f |
close(fd[0]);
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aea12f |
server(fd[1]);
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aea12f |
exit(0);
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aea12f |
}
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aea12f |
}
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#endif /* _WIN32 */
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