#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>

#include "config.h"
#include "torture.h"

#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

static int setup_echo_srv_udp_ipv4(void **state)
{
	torture_setup_echo_srv_udp_ipv4(state);

	return 0;
}

#ifdef HAVE_IPV6
static int setup_echo_srv_udp_ipv6(void **state)
{
	torture_setup_echo_srv_udp_ipv6(state);

	return 0;
}
#endif

static int teardown(void **state)
{
	torture_teardown_echo_srv(state);

	return 0;
}

static void test_sendto_recvfrom_ipv4(void **state)
{
	struct torture_address addr = {
		.sa_socklen = sizeof(struct sockaddr_in),
	};
	char send_buf[64] = {0};
	char recv_buf[64] = {0};
	ssize_t ret;
	int rc;
	int i;
	int s;

	(void) state; /* unused */

	s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	assert_int_not_equal(s, -1);

	addr.sa.in.sin_family = AF_INET;
	addr.sa.in.sin_port = htons(torture_server_port());

	rc = inet_pton(AF_INET,
		       torture_server_address(AF_INET),
		       &addr.sa.in.sin_addr);
	assert_int_equal(rc, 1);

	for (i = 0; i < 10; i++) {
		char ip[INET_ADDRSTRLEN] = {0};
		const char *a;
		struct torture_address srv_in = {
			.sa_socklen = sizeof(struct sockaddr_in),
		};

		snprintf(send_buf, sizeof(send_buf), "packet.%d", i);

		ret = sendto(s,
			     send_buf,
			     sizeof(send_buf),
			     0,
			     &addr.sa.s,
			     addr.sa_socklen);
		assert_return_code(ret, errno);

		ret = recvfrom(s,
			       recv_buf,
			       sizeof(recv_buf),
			       0,
			       &srv_in.sa.s,
			       &srv_in.sa_socklen);
		assert_return_code(ret, errno);

		a = inet_ntop(AF_INET, &srv_in.sa.in.sin_addr, ip, sizeof(ip));
		assert_non_null(a);
		assert_string_equal(a, torture_server_address(AF_INET));

		assert_memory_equal(send_buf, recv_buf, sizeof(send_buf));
	}

	ret = sendto(s,
		     send_buf,
		     sizeof(send_buf),
		     0,
		     &addr.sa.s,
		     addr.sa_socklen);
	assert_return_code(ret, errno);

	ret = recvfrom(s,
		       recv_buf,
		       sizeof(recv_buf),
		       0,
		       NULL,
		       NULL);
	assert_return_code(ret, errno);

	close(s);
}

#ifdef HAVE_IPV6
static void test_sendto_recvfrom_ipv6(void **state)
{
	struct torture_address addr = {
		.sa_socklen = sizeof(struct sockaddr_in6),
	};
	char send_buf[64] = {0};
	char recv_buf[64] = {0};
	ssize_t ret;
	int rc;
	int i;
	int s;

	(void) state; /* unused */

	s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
	assert_int_not_equal(s, -1);

	addr.sa.in6.sin6_family = AF_INET6;
	addr.sa.in6.sin6_port = htons(torture_server_port());

	rc = inet_pton(AF_INET6,
		       torture_server_address(AF_INET6),
		       &addr.sa.in6.sin6_addr);
	assert_int_equal(rc, 1);

	for (i = 0; i < 10; i++) {
		char ip[INET6_ADDRSTRLEN] = {0};
		const char *a;
		struct torture_address srv_in6 = {
			.sa_socklen = sizeof(struct sockaddr_in6),
		};

		snprintf(send_buf, sizeof(send_buf), "packet.%d", i);

		ret = sendto(s,
			     send_buf,
			     sizeof(send_buf),
			     0,
			     &addr.sa.s,
			     addr.sa_socklen);
		assert_return_code(ret, errno);

		ret = recvfrom(s,
			       recv_buf,
			       sizeof(recv_buf),
			       0,
			       &srv_in6.sa.s,
			       &srv_in6.sa_socklen);
		assert_return_code(ret, errno);

		a = inet_ntop(AF_INET6, &srv_in6.sa.in6.sin6_addr, ip, sizeof(ip));
		assert_non_null(a);
		assert_string_equal(a, torture_server_address(AF_INET6));

		assert_memory_equal(send_buf, recv_buf, sizeof(send_buf));
	}

	ret = sendto(s,
		     send_buf,
		     sizeof(send_buf),
		     0,
		     &addr.sa.s,
		     addr.sa_socklen);
	assert_return_code(ret, errno);

	ret = recvfrom(s,
		       recv_buf,
		       sizeof(recv_buf),
		       0,
		       NULL,
		       NULL);
	assert_return_code(ret, errno);

	close(s);
}
#endif

static void test_connect_sendto_ipv4(void **state)
{
	struct torture_address addr = {
		.sa_socklen = sizeof(struct sockaddr_in),
	};
	char send_buf[] = "packet.0";
	char recv_buf[64] = {0};
	ssize_t ret;
	int rc;
	int s;

	(void) state; /* unused */

	addr.sa.in.sin_family = AF_INET;
	addr.sa.in.sin_port = htons(torture_server_port());

	rc = inet_pton(AF_INET,
		       torture_server_address(AF_INET),
		       &addr.sa.in.sin_addr);
	assert_int_equal(rc, 1);

	s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	assert_int_not_equal(s, -1);

	/* Now, connect */
	rc = connect(s, &addr.sa.s, addr.sa_socklen);
	assert_return_code(rc, errno);

	ret = sendto(s,
		     send_buf,
		     sizeof(send_buf),
		     0,
		     &addr.sa.s,
		     addr.sa_socklen);
	assert_return_code(ret, errno);

	ret = recvfrom(s,
		       recv_buf,
		       sizeof(recv_buf),
		       0,
		       NULL,
		       0);
	assert_return_code(ret, errno);

	assert_memory_equal(send_buf, recv_buf, sizeof(send_buf));

	close(s);
}

static void test_connect_sendto_null_ipv4(void **state)
{
	struct torture_address addr = {
		.sa_socklen = sizeof(struct sockaddr_in),
	};
	char send_buf[] = "packet.0";
	char recv_buf[64] = {0};
	ssize_t ret;
	int rc;
	int s;

	(void) state; /* unused */

	addr.sa.in.sin_family = AF_INET;
	addr.sa.in.sin_port = htons(torture_server_port());

	rc = inet_pton(AF_INET,
		       torture_server_address(AF_INET),
		       &addr.sa.in.sin_addr);
	assert_int_equal(rc, 1);

	s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	assert_int_not_equal(s, -1);

	/* Now, connect */
	rc = connect(s, &addr.sa.s, addr.sa_socklen);
	assert_return_code(rc, errno);

	ret = sendto(s,
		     send_buf,
		     sizeof(send_buf),
		     0,
		     NULL,
		     0);
	assert_return_code(ret, errno);

	ret = recvfrom(s,
		       recv_buf,
		       sizeof(recv_buf),
		       0,
		       NULL,
		       0);
	assert_return_code(ret, errno);

	assert_memory_equal(send_buf, recv_buf, sizeof(send_buf));

	close(s);
}

int main(void) {
	int rc;

	const struct CMUnitTest sendto_tests[] = {
		cmocka_unit_test_setup_teardown(test_sendto_recvfrom_ipv4,
						setup_echo_srv_udp_ipv4,
						teardown),
#ifdef HAVE_IPV6
		cmocka_unit_test_setup_teardown(test_sendto_recvfrom_ipv6,
						setup_echo_srv_udp_ipv6,
						teardown),
#endif
		cmocka_unit_test_setup_teardown(test_connect_sendto_ipv4,
						setup_echo_srv_udp_ipv4,
						teardown),
		cmocka_unit_test_setup_teardown(test_connect_sendto_null_ipv4,
						setup_echo_srv_udp_ipv4,
						teardown),
	};

	rc = cmocka_run_group_tests(sendto_tests, NULL, NULL);

	return rc;
}
