src/func_tests/test_tcp_style.c - RealtimeRoboticsGroup/test - Gitiles

 /* SCTP kernel Implementation
  * (C) Copyright IBM Corp. 2003
  * Copyright (c) 1999-2001 Motorola, Inc.
  *
  * This file is part of the SCTP kernel Implementation
  *
  * The SCTP implementation 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 2, or (at your option)
  * any later version.
  *
  * The SCTP implementation 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 GNU CC; see the file COPYING.  If not, write to
  * the Free Software Foundation, 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  *
  * Please send any bug reports or fixes you make to the
  * email address(es):
  *    lksctp developers <lksctp-developers@lists.sourceforge.net>
  *
  * Or submit a bug report through the following website:
  *    http://www.sf.net/projects/lksctp
  *
  * Any bugs reported to us we will try to fix... any fixes shared will
  * be incorporated into the next SCTP release.
  *
  * Written or modified by:
  *    Sridhar Samudrala		<sri@us.ibm.com>
  */

 /* This is a kernel test to verify the TCP-style socket interfaces. */

 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <sys/poll.h>
 #include <netinet/in.h>
 #include <errno.h>
 #include <netinet/sctp.h>
 #include <sctputil.h>

 char *TCID = __FILE__;
 int TST_TOTAL = 22;
 int TST_CNT = 0;

 #define MAX_CLIENTS 10

 int
 main(int argc, char *argv[])
 {
 	int clt_sk[MAX_CLIENTS], accept_sk[MAX_CLIENTS];
 	int listen_sk, clt2_sk, accept2_sk;
 	sockaddr_storage_t clt_loop[MAX_CLIENTS];
 	sockaddr_storage_t svr_loop, accept_loop, clt2_loop;
 	socklen_t addrlen;
 	int error, i;
         char *message = "hello, world!\n";
 	char msgbuf[100];
 	int pf_class;
 	struct pollfd poll_fd;
 	fd_set set;
 	struct msghdr outmessage;
 	char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
 	struct iovec out_iov;
 	struct cmsghdr *cmsg;
 	struct sctp_sndrcvinfo *sinfo;
 	struct msghdr inmessage;
 	char incmsg[CMSG_SPACE(sizeof(sctp_cmsg_data_t))];
 	char *big_buffer;
 	struct iovec iov;

         /* Rather than fflush() throughout the code, set stdout to
 	 * be unbuffered.
 	 */
 	setvbuf(stdout, NULL, _IONBF, 0);

 	/* Initialize the server and client addresses. */
 #if TEST_V6
 	pf_class = PF_INET6;
         svr_loop.v6.sin6_family = AF_INET6;
         svr_loop.v6.sin6_addr = in6addr_loopback;
         svr_loop.v6.sin6_port = htons(SCTP_TESTPORT_1);
 	for (i = 0; i < MAX_CLIENTS; i++) {
         	clt_loop[i].v6.sin6_family = AF_INET6;
         	clt_loop[i].v6.sin6_addr = in6addr_loopback;
         	clt_loop[i].v6.sin6_port = htons(SCTP_TESTPORT_2 + i);
 	}
         clt2_loop.v6.sin6_family = AF_INET6;
         clt2_loop.v6.sin6_addr = in6addr_loopback;
         clt2_loop.v6.sin6_port = htons(SCTP_TESTPORT_2 + i);
 #else
 	pf_class = PF_INET;
 	svr_loop.v4.sin_family = AF_INET;
 	svr_loop.v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
 	svr_loop.v4.sin_port = htons(SCTP_TESTPORT_1);
 	for (i = 0; i < MAX_CLIENTS; i++) {
 		clt_loop[i].v4.sin_family = AF_INET;
 		clt_loop[i].v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
 		clt_loop[i].v4.sin_port = htons(SCTP_TESTPORT_2 + i);
 	}
 	clt2_loop.v4.sin_family = AF_INET;
 	clt2_loop.v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
 	clt2_loop.v4.sin_port = htons(SCTP_TESTPORT_2 + i);
 #endif

 	/* Create and bind the listening server socket.  */
         listen_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
 	test_bind(listen_sk, &svr_loop.sa, sizeof(svr_loop));

 	/* Mark listen_sk as being able to accept new associations.  */
 	test_listen(listen_sk, MAX_CLIENTS-1);

 	/* Create and bind the client sockets.  */
 	for (i = 0; i < MAX_CLIENTS; i++) {
 		clt_sk[i] = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
 		test_bind(clt_sk[i], &clt_loop[i].sa, sizeof(clt_loop[i]));
 	}
 	clt2_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
 	test_bind(clt2_sk, &clt2_loop.sa, sizeof(clt2_loop));

 	addrlen = sizeof(accept_loop);
 	/* Try to do accept on a non-listening socket. It should fail. */
 	error = accept(clt_sk[0], &accept_loop.sa, &addrlen);
 	if ((-1 != error) && (EINVAL != errno))
 		tst_brkm(TBROK, tst_exit, "accept on non-listening socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "accept on non-listening socket");

 	/* Try to do a connect from a listening socket. It should fail. */
 	error = connect(listen_sk, (struct sockaddr *)&clt_loop[0],
 			sizeof(clt_loop[0]));
 	if ((-1 != error) && (EISCONN != errno))
 		tst_brkm(TBROK, tst_exit, "connect to non-listening socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "connect to non-listening socket");

 	/* Do a blocking connect from clt_sk's to listen_sk */
 	for (i = 0; i < MAX_CLIENTS; i++)
 		test_connect(clt_sk[i], &svr_loop.sa, sizeof(svr_loop));

 	tst_resm(TPASS, "connect to listening socket");

 	/* Verify that no more connect's can be done after the acceptq
 	 * backlog has reached the max value.
 	 */
 	error = connect(clt2_sk, &svr_loop.sa, sizeof(svr_loop));
 	if ((-1 != error) && (ECONNREFUSED != errno))
 		tst_brkm(TBROK, tst_exit, "connect after max backlog "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "connect after max backlog");

 	/* Extract the associations on the listening socket as new sockets. */
 	for (i = 0; i < MAX_CLIENTS; i++) {
 		poll_fd.fd = listen_sk;
 		poll_fd.events = POLLIN;
 		poll_fd.revents = 0;
 		error = poll(&poll_fd, 1, -1);
 		if ((1 != error) && (1 != poll_fd.revents))
 			tst_brkm(TBROK, tst_exit, "Unexpected return value "
 				 "with poll, error:%d errno:%d, revents:%d",
 				 error, errno, poll_fd.revents);

 		addrlen = sizeof(accept_loop);
 		accept_sk[i] = test_accept(listen_sk, &accept_loop.sa,
 					   &addrlen);
 	}

 	tst_resm(TPASS, "accept from listening socket");

 	/* Try to do a connect on an established socket. It should fail. */
 	error = connect(accept_sk[0], &clt_loop[0].sa, sizeof(clt_loop[0]));
 	if ((-1 != error) || (EISCONN != errno))
 		tst_brkm(TBROK, tst_exit, "connect on an established socket "
 			 "error:%d errno:%d", error, errno);

 	tst_resm(TPASS, "connect on an established socket");

 	/* Try to do accept on an established socket. It should fail. */
 	error = accept(accept_sk[0], &accept_loop.sa, &addrlen);
 	if ((-1 != error) && (EINVAL != errno))
 		tst_brkm(TBROK, tst_exit, "accept on an established socket "
 			 "error:%d errno:%d", error, errno);

 	error = accept(clt_sk[0], &accept_loop.sa, &addrlen);
 	if ((-1 != error) && (EINVAL != errno))
 		tst_brkm(TBROK, tst_exit, "accept on an established socket "
 			 "failure: error:%d errno:%d", error, errno);

 	tst_resm(TPASS, "accept on an established socket");

 	/* Send and receive a message from the client sockets to the accepted
 	 * sockets.
 	 */
 	for (i = 0; i < MAX_CLIENTS; i++) {
 		test_send(clt_sk[i], message, strlen(message), 0);
 		test_recv(accept_sk[i], msgbuf, 100, 0);
 	}

 	tst_resm(TPASS, "client sockets -> accepted sockets");

 	/* Send and receive a message from the accepted sockets to the client
 	 * sockets.
 	 */
 	for (i = 0; i < MAX_CLIENTS; i++) {
 		test_send(accept_sk[i], message, strlen(message), 0);
 		test_recv(clt_sk[i], msgbuf, 100, 0);
 	}

 	tst_resm(TPASS, "accepted sockets -> client sockets");

 	/* Sending a message on a listening socket should fail. */
 	error = send(listen_sk, message, strlen(message), MSG_NOSIGNAL);
 	if ((-1 != error) || (EPIPE != errno))
 		tst_brkm(TBROK, tst_exit, "send on a listening socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "send on a listening socket");

 	/* Trying to receive a message on a listening socket should fail. */
 	error = recv(listen_sk, msgbuf, 100, 0);
 	if ((-1 != error) || (ENOTCONN != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a listening socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "recv on a listening socket");

 	/* TESTCASES for shutdown() */
 	errno = 0;
 	test_send(accept_sk[0], message, strlen(message), 0);

 	/* Enable ASSOC_CHANGE and SNDRCVINFO notifications. */
 	test_enable_assoc_change(clt_sk[0]);

 	/* Do a SHUT_WR on clt_sk[0] to disable any new sends. */
 	test_shutdown(clt_sk[0], SHUT_WR);

 	/* Reading on a socket that has received SHUTDOWN should return 0
 	 * indicating EOF.
 	 */
 	error = recv(accept_sk[0], msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUTDOWN received socket "
 			 "error:%d errno:%d", error, errno);

 	tst_resm(TPASS, "recv on a SHUTDOWN received socket");

 	/* Read the pending message on clt_sk[0] that was received before
 	 * SHUTDOWN call.
 	 */
 	test_recv(clt_sk[0], msgbuf, 100, 0);

 	/* Initialize inmessage for all receives. */
 	big_buffer = test_malloc(REALLY_BIG);
 	memset(&inmessage, 0, sizeof(inmessage));
 	iov.iov_base = big_buffer;
 	iov.iov_len = REALLY_BIG;
 	inmessage.msg_iov = &iov;
 	inmessage.msg_iovlen = 1;
 	inmessage.msg_control = incmsg;
 	inmessage.msg_controllen = sizeof(incmsg);

 	/* Receive the SHUTDOWN_COMP notification as they are enabled. */
 	error = test_recvmsg(clt_sk[0], &inmessage, MSG_WAITALL);
 	test_check_msg_notification(&inmessage, error,
 				    sizeof(struct sctp_assoc_change),
 				    SCTP_ASSOC_CHANGE, SCTP_SHUTDOWN_COMP);

 	tst_resm(TPASS, "recv SHUTDOWN_COMP notification on a SHUT_WR socket");

 	/* No more messages and the association is SHUTDOWN, should fail. */
 	error = recv(clt_sk[0], msgbuf, 100, 0);
 	if ((-1 != error) || (ENOTCONN != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUTDOWN sent socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "recv on a SHUTDOWN sent socket");

 	errno = 0;

 	/* Do a SHUT_RD on clt_sk[1] to disable any new receives. */
 	test_shutdown(clt_sk[1], SHUT_RD);

 	error = recv(clt_sk[1], msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUT_RD socket "
 			 "error:%d, errno:%d", error, errno);

 	/* Sending a message on SHUT_RD socket. */
 	test_send(clt_sk[1], message, strlen(message), 0);

 	/* Receive the message sent on SHUT_RD socket. */
 	test_recv(accept_sk[1], msgbuf, 100, 0);

 	/* Send a message to the SHUT_RD socket. */
 	test_send(accept_sk[1], message, strlen(message), 0);

 	/* We should not receive the message as the socket is SHUT_RD */
 	error = recv(clt_sk[1], msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUT_RD socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "recv on a SHUT_RD socket");

 	/* Do a SHUT_RDWR on clt_sk[2] to disable any new sends/receives. */
 	test_shutdown(clt_sk[2], SHUT_RDWR);

 	error = recv(accept_sk[2], msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUT_RDWR socket "
 			 "error:%d, errno:%d", error, errno);

 	error = recv(clt_sk[2], msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "recv on a SHUT_RDWR socket "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "recv on a SHUT_RDWR socket");

 	error = 0;

 	for (i = 0; i < MAX_CLIENTS; i++)
 		close(clt_sk[i]);
 	for (i = 0; i < MAX_CLIENTS; i++)
 		close(accept_sk[i]);

 	/* Test case to verify accept of a CLOSED association. */
 	/* Do a connect, send and a close to ESTABLISH and CLOSE an
 	 * association on the listening socket.
 	 */
 	test_connect(clt2_sk, &svr_loop.sa, sizeof(svr_loop));

 	test_send(clt2_sk, message, strlen(message), 0);

 	close(clt2_sk);

 	FD_ZERO(&set);
 	FD_SET(listen_sk, &set);

 	error = select(listen_sk + 1, &set, NULL, NULL, NULL);
 	if (1 != error)
 		tst_brkm(TBROK, tst_exit, "select error:%d, "
 			 "errno: %d", error, errno);

 	/* Now accept the CLOSED association waiting on the listening
 	 * socket.
 	 */
 	accept2_sk = test_accept(listen_sk, &accept_loop.sa, &addrlen);

 	/* Receive the message sent before doing a close. */
 	test_recv(accept2_sk, msgbuf, 100, 0);

 	/* Receive EOF indication as there are no more messages and the
 	 * socket is SHUTDOWN.
 	 */
 	error = recv(accept2_sk, msgbuf, 100, 0);
 	if ((0 != error) || (0 != errno))
 		tst_brkm(TBROK, tst_exit, "Unexpected error return on "
 			 "recv(error:%d, errno:%d)", error, errno);

 	tst_resm(TPASS, "accept of a CLOSED association");

 	/* Trying to send a message over the CLOSED association should
 	 * generate EPIPE.
 	 */
 	error = send(accept2_sk, message, strlen(message), MSG_NOSIGNAL);
 	if ((-1 != error) || (EPIPE != errno))
 		tst_brkm(TBROK, tst_exit, "send to a CLOSED association "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "send to a CLOSED association");

 	error = 0;
 	close(accept2_sk);

 	/* Verify that auto-connect can be done on a TCP-style socket using
 	 * sendto/sendmsg.
 	 */
 	clt2_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
 	test_bind(clt2_sk, &clt2_loop.sa, sizeof(clt2_loop));

 	/* Do a sendto() without a connect() */
 	test_sendto(clt2_sk, message, strlen(message), 0, &svr_loop.sa,
 		    sizeof(svr_loop));

 	accept2_sk = test_accept(listen_sk, &accept_loop.sa, &addrlen);

 	test_recv(accept2_sk, msgbuf, 100, 0);

 	tst_resm(TPASS, "auto-connect using sendto");

 	outmessage.msg_name = &svr_loop;
 	outmessage.msg_namelen = sizeof(svr_loop);
 	outmessage.msg_iov = NULL;
 	outmessage.msg_iovlen = 0;
 	outmessage.msg_control = outcmsg;
 	outmessage.msg_controllen = sizeof(outcmsg);
 	outmessage.msg_flags = 0;

 	cmsg = CMSG_FIRSTHDR(&outmessage);
 	cmsg->cmsg_level = IPPROTO_SCTP;
 	cmsg->cmsg_type = SCTP_SNDRCV;
 	cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
 	outmessage.msg_controllen = cmsg->cmsg_len;
 	sinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
 	memset(sinfo, 0x00, sizeof(struct sctp_sndrcvinfo));

 	/* Verify that SCTP_EOF cannot be used to shutdown an association
 	 * on a TCP-style socket.
 	 */
 	sinfo->sinfo_flags |= SCTP_EOF;
 	error = sendmsg(clt2_sk, &outmessage, 0);
 	if ((-1 != error) || (EINVAL != errno))
 		tst_brkm(TBROK, tst_exit, "sendmsg with SCTP_EOF flag "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "sendmsg with SCTP_EOF flag");

 	/* Verify that SCTP_ABORT cannot be used to abort an association
 	 * on a TCP-style socket.
 	 */
 	sinfo->sinfo_flags |= SCTP_ABORT;
 	error = sendmsg(clt2_sk, &outmessage, 0);
 	if ((-1 != error) || (EINVAL != errno))
 		tst_brkm(TBROK, tst_exit, "sendmsg with SCTP_ABORT flag "
 			 "error:%d, errno:%d", error, errno);

 	tst_resm(TPASS, "sendmsg with SCTP_ABORT flag");

 	/* Verify that a normal message can be sent using sendmsg. */
 	outmessage.msg_iov = &out_iov;
 	outmessage.msg_iovlen = 1;
 	out_iov.iov_base = message;
 	out_iov.iov_len = strlen(message) + 1;
 	sinfo->sinfo_flags = 0;
 	test_sendmsg(clt2_sk, &outmessage, 0, strlen(message)+1);

 	test_recv(accept2_sk, msgbuf, 100, 0);

 	tst_resm(TPASS, "sendmsg with no flags");

 	close(clt2_sk);
 	close(accept2_sk);
 	close(listen_sk);

         /* Indicate successful completion.  */
 	return 0;
 }
	/* SCTP kernel Implementation
	* (C) Copyright IBM Corp. 2003
	* Copyright (c) 1999-2001 Motorola, Inc.
	*
	* This file is part of the SCTP kernel Implementation
	*
	* The SCTP implementation 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 2, or (at your option)
	* any later version.
	*
	* The SCTP implementation 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 GNU CC; see the file COPYING. If not, write to
	* the Free Software Foundation, 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*
	* Please send any bug reports or fixes you make to the
	* email address(es):
	* lksctp developers <lksctp-developers@lists.sourceforge.net>
	*
	* Or submit a bug report through the following website:
	* http://www.sf.net/projects/lksctp
	*
	* Any bugs reported to us we will try to fix... any fixes shared will
	* be incorporated into the next SCTP release.
	*
	* Written or modified by:
	* Sridhar Samudrala <sri@us.ibm.com>
	*/

	/* This is a kernel test to verify the TCP-style socket interfaces. */

	#include <stdio.h>
	#include <unistd.h>
	#include <stdlib.h>
	#include <string.h>
	#include <fcntl.h>
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <sys/uio.h>
	#include <sys/poll.h>
	#include <netinet/in.h>
	#include <errno.h>
	#include <netinet/sctp.h>
	#include <sctputil.h>

	char *TCID = __FILE__;
	int TST_TOTAL = 22;
	int TST_CNT = 0;

	#define MAX_CLIENTS 10

	int
	main(int argc, char *argv[])
	{
	int clt_sk[MAX_CLIENTS], accept_sk[MAX_CLIENTS];
	int listen_sk, clt2_sk, accept2_sk;
	sockaddr_storage_t clt_loop[MAX_CLIENTS];
	sockaddr_storage_t svr_loop, accept_loop, clt2_loop;
	socklen_t addrlen;
	int error, i;
	char *message = "hello, world!\n";
	char msgbuf[100];
	int pf_class;
	struct pollfd poll_fd;
	fd_set set;
	struct msghdr outmessage;
	char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
	struct iovec out_iov;
	struct cmsghdr *cmsg;
	struct sctp_sndrcvinfo *sinfo;
	struct msghdr inmessage;
	char incmsg[CMSG_SPACE(sizeof(sctp_cmsg_data_t))];
	char *big_buffer;
	struct iovec iov;

	/* Rather than fflush() throughout the code, set stdout to
	* be unbuffered.
	*/
	setvbuf(stdout, NULL, _IONBF, 0);

	/* Initialize the server and client addresses. */
	#if TEST_V6
	pf_class = PF_INET6;
	svr_loop.v6.sin6_family = AF_INET6;
	svr_loop.v6.sin6_addr = in6addr_loopback;
	svr_loop.v6.sin6_port = htons(SCTP_TESTPORT_1);
	for (i = 0; i < MAX_CLIENTS; i++) {
	clt_loop[i].v6.sin6_family = AF_INET6;
	clt_loop[i].v6.sin6_addr = in6addr_loopback;
	clt_loop[i].v6.sin6_port = htons(SCTP_TESTPORT_2 + i);
	}
	clt2_loop.v6.sin6_family = AF_INET6;
	clt2_loop.v6.sin6_addr = in6addr_loopback;
	clt2_loop.v6.sin6_port = htons(SCTP_TESTPORT_2 + i);
	#else
	pf_class = PF_INET;
	svr_loop.v4.sin_family = AF_INET;
	svr_loop.v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
	svr_loop.v4.sin_port = htons(SCTP_TESTPORT_1);
	for (i = 0; i < MAX_CLIENTS; i++) {
	clt_loop[i].v4.sin_family = AF_INET;
	clt_loop[i].v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
	clt_loop[i].v4.sin_port = htons(SCTP_TESTPORT_2 + i);
	}
	clt2_loop.v4.sin_family = AF_INET;
	clt2_loop.v4.sin_addr.s_addr = SCTP_IP_LOOPBACK;
	clt2_loop.v4.sin_port = htons(SCTP_TESTPORT_2 + i);
	#endif

	/* Create and bind the listening server socket. */
	listen_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
	test_bind(listen_sk, &svr_loop.sa, sizeof(svr_loop));

	/* Mark listen_sk as being able to accept new associations. */
	test_listen(listen_sk, MAX_CLIENTS-1);

	/* Create and bind the client sockets. */
	for (i = 0; i < MAX_CLIENTS; i++) {
	clt_sk[i] = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
	test_bind(clt_sk[i], &clt_loop[i].sa, sizeof(clt_loop[i]));
	}
	clt2_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
	test_bind(clt2_sk, &clt2_loop.sa, sizeof(clt2_loop));

	addrlen = sizeof(accept_loop);
	/* Try to do accept on a non-listening socket. It should fail. */
	error = accept(clt_sk[0], &accept_loop.sa, &addrlen);
	if ((-1 != error) && (EINVAL != errno))
	tst_brkm(TBROK, tst_exit, "accept on non-listening socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "accept on non-listening socket");

	/* Try to do a connect from a listening socket. It should fail. */
	error = connect(listen_sk, (struct sockaddr *)&clt_loop[0],
	sizeof(clt_loop[0]));
	if ((-1 != error) && (EISCONN != errno))
	tst_brkm(TBROK, tst_exit, "connect to non-listening socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "connect to non-listening socket");

	/* Do a blocking connect from clt_sk's to listen_sk */
	for (i = 0; i < MAX_CLIENTS; i++)
	test_connect(clt_sk[i], &svr_loop.sa, sizeof(svr_loop));

	tst_resm(TPASS, "connect to listening socket");

	/* Verify that no more connect's can be done after the acceptq
	* backlog has reached the max value.
	*/
	error = connect(clt2_sk, &svr_loop.sa, sizeof(svr_loop));
	if ((-1 != error) && (ECONNREFUSED != errno))
	tst_brkm(TBROK, tst_exit, "connect after max backlog "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "connect after max backlog");

	/* Extract the associations on the listening socket as new sockets. */
	for (i = 0; i < MAX_CLIENTS; i++) {
	poll_fd.fd = listen_sk;
	poll_fd.events = POLLIN;
	poll_fd.revents = 0;
	error = poll(&poll_fd, 1, -1);
	if ((1 != error) && (1 != poll_fd.revents))
	tst_brkm(TBROK, tst_exit, "Unexpected return value "
	"with poll, error:%d errno:%d, revents:%d",
	error, errno, poll_fd.revents);

	addrlen = sizeof(accept_loop);
	accept_sk[i] = test_accept(listen_sk, &accept_loop.sa,
	&addrlen);
	}

	tst_resm(TPASS, "accept from listening socket");

	/* Try to do a connect on an established socket. It should fail. */
	error = connect(accept_sk[0], &clt_loop[0].sa, sizeof(clt_loop[0]));
	if ((-1 != error) \|\| (EISCONN != errno))
	tst_brkm(TBROK, tst_exit, "connect on an established socket "
	"error:%d errno:%d", error, errno);

	tst_resm(TPASS, "connect on an established socket");

	/* Try to do accept on an established socket. It should fail. */
	error = accept(accept_sk[0], &accept_loop.sa, &addrlen);
	if ((-1 != error) && (EINVAL != errno))
	tst_brkm(TBROK, tst_exit, "accept on an established socket "
	"error:%d errno:%d", error, errno);

	error = accept(clt_sk[0], &accept_loop.sa, &addrlen);
	if ((-1 != error) && (EINVAL != errno))
	tst_brkm(TBROK, tst_exit, "accept on an established socket "
	"failure: error:%d errno:%d", error, errno);

	tst_resm(TPASS, "accept on an established socket");

	/* Send and receive a message from the client sockets to the accepted
	* sockets.
	*/
	for (i = 0; i < MAX_CLIENTS; i++) {
	test_send(clt_sk[i], message, strlen(message), 0);
	test_recv(accept_sk[i], msgbuf, 100, 0);
	}

	tst_resm(TPASS, "client sockets -> accepted sockets");

	/* Send and receive a message from the accepted sockets to the client
	* sockets.
	*/
	for (i = 0; i < MAX_CLIENTS; i++) {
	test_send(accept_sk[i], message, strlen(message), 0);
	test_recv(clt_sk[i], msgbuf, 100, 0);
	}

	tst_resm(TPASS, "accepted sockets -> client sockets");

	/* Sending a message on a listening socket should fail. */
	error = send(listen_sk, message, strlen(message), MSG_NOSIGNAL);
	if ((-1 != error) \|\| (EPIPE != errno))
	tst_brkm(TBROK, tst_exit, "send on a listening socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "send on a listening socket");

	/* Trying to receive a message on a listening socket should fail. */
	error = recv(listen_sk, msgbuf, 100, 0);
	if ((-1 != error) \|\| (ENOTCONN != errno))
	tst_brkm(TBROK, tst_exit, "recv on a listening socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "recv on a listening socket");

	/* TESTCASES for shutdown() */
	errno = 0;
	test_send(accept_sk[0], message, strlen(message), 0);

	/* Enable ASSOC_CHANGE and SNDRCVINFO notifications. */
	test_enable_assoc_change(clt_sk[0]);

	/* Do a SHUT_WR on clt_sk[0] to disable any new sends. */
	test_shutdown(clt_sk[0], SHUT_WR);

	/* Reading on a socket that has received SHUTDOWN should return 0
	* indicating EOF.
	*/
	error = recv(accept_sk[0], msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUTDOWN received socket "
	"error:%d errno:%d", error, errno);

	tst_resm(TPASS, "recv on a SHUTDOWN received socket");

	/* Read the pending message on clt_sk[0] that was received before
	* SHUTDOWN call.
	*/
	test_recv(clt_sk[0], msgbuf, 100, 0);

	/* Initialize inmessage for all receives. */
	big_buffer = test_malloc(REALLY_BIG);
	memset(&inmessage, 0, sizeof(inmessage));
	iov.iov_base = big_buffer;
	iov.iov_len = REALLY_BIG;
	inmessage.msg_iov = &iov;
	inmessage.msg_iovlen = 1;
	inmessage.msg_control = incmsg;
	inmessage.msg_controllen = sizeof(incmsg);

	/* Receive the SHUTDOWN_COMP notification as they are enabled. */
	error = test_recvmsg(clt_sk[0], &inmessage, MSG_WAITALL);
	test_check_msg_notification(&inmessage, error,
	sizeof(struct sctp_assoc_change),
	SCTP_ASSOC_CHANGE, SCTP_SHUTDOWN_COMP);

	tst_resm(TPASS, "recv SHUTDOWN_COMP notification on a SHUT_WR socket");

	/* No more messages and the association is SHUTDOWN, should fail. */
	error = recv(clt_sk[0], msgbuf, 100, 0);
	if ((-1 != error) \|\| (ENOTCONN != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUTDOWN sent socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "recv on a SHUTDOWN sent socket");

	errno = 0;

	/* Do a SHUT_RD on clt_sk[1] to disable any new receives. */
	test_shutdown(clt_sk[1], SHUT_RD);

	error = recv(clt_sk[1], msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUT_RD socket "
	"error:%d, errno:%d", error, errno);

	/* Sending a message on SHUT_RD socket. */
	test_send(clt_sk[1], message, strlen(message), 0);

	/* Receive the message sent on SHUT_RD socket. */
	test_recv(accept_sk[1], msgbuf, 100, 0);

	/* Send a message to the SHUT_RD socket. */
	test_send(accept_sk[1], message, strlen(message), 0);

	/* We should not receive the message as the socket is SHUT_RD */
	error = recv(clt_sk[1], msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUT_RD socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "recv on a SHUT_RD socket");

	/* Do a SHUT_RDWR on clt_sk[2] to disable any new sends/receives. */
	test_shutdown(clt_sk[2], SHUT_RDWR);

	error = recv(accept_sk[2], msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUT_RDWR socket "
	"error:%d, errno:%d", error, errno);

	error = recv(clt_sk[2], msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "recv on a SHUT_RDWR socket "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "recv on a SHUT_RDWR socket");

	error = 0;

	for (i = 0; i < MAX_CLIENTS; i++)
	close(clt_sk[i]);
	for (i = 0; i < MAX_CLIENTS; i++)
	close(accept_sk[i]);

	/* Test case to verify accept of a CLOSED association. */
	/* Do a connect, send and a close to ESTABLISH and CLOSE an
	* association on the listening socket.
	*/
	test_connect(clt2_sk, &svr_loop.sa, sizeof(svr_loop));

	test_send(clt2_sk, message, strlen(message), 0);

	close(clt2_sk);

	FD_ZERO(&set);
	FD_SET(listen_sk, &set);

	error = select(listen_sk + 1, &set, NULL, NULL, NULL);
	if (1 != error)
	tst_brkm(TBROK, tst_exit, "select error:%d, "
	"errno: %d", error, errno);

	/* Now accept the CLOSED association waiting on the listening
	* socket.
	*/
	accept2_sk = test_accept(listen_sk, &accept_loop.sa, &addrlen);

	/* Receive the message sent before doing a close. */
	test_recv(accept2_sk, msgbuf, 100, 0);

	/* Receive EOF indication as there are no more messages and the
	* socket is SHUTDOWN.
	*/
	error = recv(accept2_sk, msgbuf, 100, 0);
	if ((0 != error) \|\| (0 != errno))
	tst_brkm(TBROK, tst_exit, "Unexpected error return on "
	"recv(error:%d, errno:%d)", error, errno);

	tst_resm(TPASS, "accept of a CLOSED association");

	/* Trying to send a message over the CLOSED association should
	* generate EPIPE.
	*/
	error = send(accept2_sk, message, strlen(message), MSG_NOSIGNAL);
	if ((-1 != error) \|\| (EPIPE != errno))
	tst_brkm(TBROK, tst_exit, "send to a CLOSED association "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "send to a CLOSED association");

	error = 0;
	close(accept2_sk);

	/* Verify that auto-connect can be done on a TCP-style socket using
	* sendto/sendmsg.
	*/
	clt2_sk = test_socket(pf_class, SOCK_STREAM, IPPROTO_SCTP);
	test_bind(clt2_sk, &clt2_loop.sa, sizeof(clt2_loop));

	/* Do a sendto() without a connect() */
	test_sendto(clt2_sk, message, strlen(message), 0, &svr_loop.sa,
	sizeof(svr_loop));

	accept2_sk = test_accept(listen_sk, &accept_loop.sa, &addrlen);

	test_recv(accept2_sk, msgbuf, 100, 0);

	tst_resm(TPASS, "auto-connect using sendto");

	outmessage.msg_name = &svr_loop;
	outmessage.msg_namelen = sizeof(svr_loop);
	outmessage.msg_iov = NULL;
	outmessage.msg_iovlen = 0;
	outmessage.msg_control = outcmsg;
	outmessage.msg_controllen = sizeof(outcmsg);
	outmessage.msg_flags = 0;

	cmsg = CMSG_FIRSTHDR(&outmessage);
	cmsg->cmsg_level = IPPROTO_SCTP;
	cmsg->cmsg_type = SCTP_SNDRCV;
	cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
	outmessage.msg_controllen = cmsg->cmsg_len;
	sinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
	memset(sinfo, 0x00, sizeof(struct sctp_sndrcvinfo));

	/* Verify that SCTP_EOF cannot be used to shutdown an association
	* on a TCP-style socket.
	*/
	sinfo->sinfo_flags \|= SCTP_EOF;
	error = sendmsg(clt2_sk, &outmessage, 0);
	if ((-1 != error) \|\| (EINVAL != errno))
	tst_brkm(TBROK, tst_exit, "sendmsg with SCTP_EOF flag "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "sendmsg with SCTP_EOF flag");

	/* Verify that SCTP_ABORT cannot be used to abort an association
	* on a TCP-style socket.
	*/
	sinfo->sinfo_flags \|= SCTP_ABORT;
	error = sendmsg(clt2_sk, &outmessage, 0);
	if ((-1 != error) \|\| (EINVAL != errno))
	tst_brkm(TBROK, tst_exit, "sendmsg with SCTP_ABORT flag "
	"error:%d, errno:%d", error, errno);

	tst_resm(TPASS, "sendmsg with SCTP_ABORT flag");

	/* Verify that a normal message can be sent using sendmsg. */
	outmessage.msg_iov = &out_iov;
	outmessage.msg_iovlen = 1;
	out_iov.iov_base = message;
	out_iov.iov_len = strlen(message) + 1;
	sinfo->sinfo_flags = 0;
	test_sendmsg(clt2_sk, &outmessage, 0, strlen(message)+1);

	test_recv(accept2_sk, msgbuf, 100, 0);

	tst_resm(TPASS, "sendmsg with no flags");

	close(clt2_sk);
	close(accept2_sk);
	close(listen_sk);

	/* Indicate successful completion. */
	return 0;
	}