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      1 /*
      2  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv (at) altlinux.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote products
     14  *    derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "tests.h"
     29 #include <sys/socket.h>
     30 #include "netlink.h"
     31 
     32 int
     33 create_nl_socket_ext(const int proto, const char *const name)
     34 {
     35 	const int fd = socket(AF_NETLINK, SOCK_RAW, proto);
     36 	if (fd < 0)
     37 		perror_msg_and_skip("socket AF_NETLINK %s", name);
     38 
     39 	const struct sockaddr_nl addr = { .nl_family = AF_NETLINK };
     40 	socklen_t len = sizeof(addr);
     41 
     42 	if (bind(fd, (const struct sockaddr *) &addr, len))
     43 		perror_msg_and_skip("bind AF_NETLINK %s", name);
     44 
     45 	/* one more operation on this socket to win the race */
     46 	int listening;
     47 	len = sizeof(listening);
     48 	if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &listening, &len))
     49 		perror_msg_and_fail("getsockopt");
     50 
     51 	return fd;
     52 }
     53