/*

 * Copyright (C) 2015 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * GnuTLS is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * GnuTLS is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GnuTLS; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <string.h>

#include <errno.h>

#include <gnutls/gnutls.h>

#include <gnutls/dtls.h>

#include <signal.h>

#include <unistd.h>

#ifndef _WIN32

# include <netinet/in.h>

# include <sys/types.h>

# include <sys/socket.h>

# include <sys/wait.h>

# include <pthread.h>

#endif

#include <assert.h>

#include "utils.h"

#include "cert-common.h"

#ifdef _WIN32

void doit(void)

{

	exit(77);

}

#else

/* These are global */

pid_t child;

/* Tests whether we can send and receive from different threads

 * using DTLS, either as server or client. DTLS is a superset of

 * TLS, so correct behavior under fork means TLS would operate too.

 */

const char *side = "";

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "%s|<%d>| %s", side, level, str);

}

#define MSG "hello1111"

#define MSG2 "xxxxxxxxxxxx"

#define NO_MSGS 128

static void *recv_thread(void *arg)

{

	gnutls_session_t session = arg;

	int ret;

	unsigned i;

	char buf[64];

	if (debug)

		success("client: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	for (i=0;i

		/* the peer should reflect our messages */

		do {

			ret = gnutls_record_recv(session, buf, sizeof(buf));

		} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

		if (ret < 0)

			fail("client: recv failed: %s\n", gnutls_strerror(ret));

		if (ret != sizeof(MSG)-1 || memcmp(buf, MSG, sizeof(MSG)-1) != 0) {

			fail("client: recv failed; not the expected values (got: %d, exp: %d)\n", ret, (int)sizeof(MSG)-1);

		}

		if (debug)

			success("%d: client received: %.*s\n", i, ret, buf);

	}

	/* final MSG is MSG2 */

	do {

		ret = gnutls_record_recv(session, buf, sizeof(buf));

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

	if (ret < 0)

		fail("client: recv2 failed: %s\n", gnutls_strerror(ret));

	if (ret != sizeof(MSG2)-1 || memcmp(buf, MSG2, sizeof(MSG2)-1) != 0) {

		fail("client: recv2 failed; not the expected values\n");

	}

	if (debug) {

		success("client received: %.*s\n", ret, buf);

		success("closing recv thread\n");

	}

	pthread_exit(0);

}

static

void do_thread_stuff(gnutls_session_t session)

{

	int ret;

	unsigned i;

	pthread_t id;

	void *rval;

	sec_sleep(1);

	/* separate sending from receiving */

	ret = pthread_create(&id, NULL, recv_thread, session);

	if (ret != 0) {

		fail("error in pthread_create\n");

	}

	for (i=0;i

		do {

			ret = gnutls_record_send(session, MSG, sizeof(MSG)-1);

		} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

		if (ret != sizeof(MSG)-1) {

			fail("client: send failed: %s\n", gnutls_strerror(ret));

		}

	}

	do {

		ret = gnutls_record_send(session, MSG2, sizeof(MSG2)-1);

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

	if (ret != sizeof(MSG2)-1) {

		fail("client: send2 failed: %s\n", gnutls_strerror(ret));

	}

	if (debug)

		success("closing sending thread\n");

	assert(pthread_join(id, &rval)==0);

	assert(rval == 0);

	do {

		ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

}

static void do_reflect_stuff(gnutls_session_t session)

{

	char buf[64];

	unsigned buf_size;

	int ret;

	do {

		do {

			ret = gnutls_record_recv(session, buf, sizeof(buf));

		} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

		if (ret < 0) {

			fail("server: recv failed: %s\n", gnutls_strerror(ret));

		}

		if (ret == 0) {

			break;

		}

		buf_size = ret;

		if (debug) {

			success("server received: %.*s\n", buf_size, buf);

		}

		do {

			ret = gnutls_record_send(session, buf, buf_size);

		} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

		if (ret < 0) {

			fail("server: send failed: %s\n", gnutls_strerror(ret));

		}

		if (debug)

			success("reflected %d\n", ret);

	} while(1);

	do {

		gnutls_bye(session, GNUTLS_SHUT_WR);

	} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);

}

static void client(int fd, const char *prio, unsigned do_thread, unsigned false_start)

{

	int ret;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	unsigned flags = GNUTLS_CLIENT;

	global_init();

	if (debug) {

		side = "client";

		gnutls_global_set_log_function(tls_log_func);

		gnutls_global_set_log_level(4711);

	}

	assert(gnutls_certificate_allocate_credentials(&x509_cred)>=0);

	if (false_start)

		flags |= GNUTLS_ENABLE_FALSE_START;

	assert(gnutls_init(&session, flags|GNUTLS_DATAGRAM) >= 0);

	gnutls_dtls_set_mtu(session, 1500);

	gnutls_dtls_set_timeouts(session, 6 * 1000, 60 * 1000);

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	assert(gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred)>=0);

	gnutls_transport_set_int(session, fd);

	do {

		ret = gnutls_handshake(session);

	}

	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);

	if (ret < 0) {

		fail("client: Handshake failed: %s\n", gnutls_strerror(ret));

	} else {

		if (debug)

			success("client: Handshake was completed\n");

	}

	if (do_thread)

		do_thread_stuff(session);

	else

		do_reflect_stuff(session);

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

}

static void server(int fd, const char *prio, unsigned do_thread)

{

	int ret;

	gnutls_certificate_credentials_t x509_cred;

	gnutls_session_t session;

	global_init();

#if 0

	if (debug) {

		side = "server";

		gnutls_global_set_log_function(tls_log_func);

		gnutls_global_set_log_level(4711);

	}

#endif

	assert(gnutls_certificate_allocate_credentials(&x509_cred)>=0);

	assert(gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,

					    &server_key,

					    GNUTLS_X509_FMT_PEM)>=0);

	assert(gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM)>=0);

	gnutls_dtls_set_timeouts(session, 5 * 1000, 60 * 1000);

	gnutls_dtls_set_mtu(session, 400);

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);

	gnutls_transport_set_int(session, fd);

	do {

		ret = gnutls_handshake(session);

	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);

	if (ret < 0) {

		close(fd);

		gnutls_deinit(session);

		fail("server: Handshake has failed (%s)\n\n",

		     gnutls_strerror(ret));

	}

	if (debug)

		success("server: Handshake was completed\n");

	if (debug)

		success("server: TLS version is: %s\n",

			gnutls_protocol_get_name

			(gnutls_protocol_get_version(session)));

	if (do_thread)

		do_thread_stuff(session);

	else

		do_reflect_stuff(session);

	close(fd);

	gnutls_deinit(session);

	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)

		success("server: finished\n");

}

static

void run(const char *str, const char *prio, unsigned do_thread, unsigned false_start)

{

	int fd[2];

	int ret;

	if (str)

		success("running %s\n", str);

	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);

	if (ret < 0) {

		perror("socketpair");

		exit(1);

	}

	child = fork();

	if (child < 0) {

		perror("fork");

		fail("fork");

		exit(1);

	}

	if (child) {

		int status;

		/* parent */

		close(fd[1]);

		client(fd[0], prio, do_thread, false_start);

		wait(&status);

		check_wait_status(status);

	} else {

		close(fd[0]);

		server(fd[1], prio, 1-do_thread);

		exit(0);

	}

}

void doit(void)

{

	signal(SIGPIPE, SIG_IGN);

	run("default, threaded client", "NORMAL", 0, 0);

	run("default, threaded server", "NORMAL", 1, 0);

	run("dtls1.2, threaded client", "NORMAL:-VERS-ALL:+VERS-DTLS1.2", 0, 0);

	run("dtls1.2, threaded server", "NORMAL:-VERS-ALL:+VERS-DTLS1.2", 1, 0);

	run("dtls1.2 false start, threaded client", "NORMAL:-VERS-ALL:+VERS-DTLS1.2", 0, 1);

	run("dtls1.2 false start, threaded server", "NORMAL:-VERS-ALL:+VERS-DTLS1.2", 1, 1);

}

#endif				/* _WIN32 */