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      1 /*
      2  * Check decoding of sockaddr related arguments of recvfrom syscall.
      3  *
      4  * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #define TEST_SYSCALL_NAME recvfrom
     31 #define TEST_SYSCALL_PREPARE send_un()
     32 #define PREFIX_S_ARGS	, recv_buf, 1, 0
     33 #define PREFIX_S_STR	", \"A\", 1, 0"
     34 #define PREFIX_F_ARGS	, 0, 1, 0
     35 #define PREFIX_F_STR	", NULL, 1, 0"
     36 static void send_un(void);
     37 static char recv_buf[1];
     38 #include "sockname.c"
     39 
     40 static int cfd;
     41 
     42 static void
     43 send_un(void)
     44 {
     45 	if (send(cfd, "A", 1, 0) != 1)
     46 		perror_msg_and_skip("send");
     47 }
     48 
     49 int
     50 main(void)
     51 {
     52 	cfd = socket(AF_UNIX, SOCK_STREAM, 0);
     53 	int lfd = socket(AF_UNIX, SOCK_STREAM, 0);
     54 	if (cfd < 0 || lfd < 0)
     55 		perror_msg_and_skip("socket");
     56 
     57 	struct sockaddr_un un = {
     58 		.sun_family = AF_UNIX,
     59 		.sun_path = TEST_SOCKET ".send"
     60 	};
     61 
     62 	(void) unlink(un.sun_path);
     63 	if (bind(cfd, (const void *) &un, sizeof(un)))
     64 		perror_msg_and_skip("bind");
     65 	(void) unlink(un.sun_path);
     66 
     67 	un.sun_path[sizeof(TEST_SOCKET) - 1] = '\0';
     68 	(void) unlink(un.sun_path);
     69 
     70 	if (bind(lfd, (const void *) &un, sizeof(un)))
     71 		perror_msg_and_skip("bind");
     72 
     73 	if (listen(lfd, 1))
     74 		perror_msg_and_skip("listen");
     75 
     76 	if (connect(cfd, (const void *) &un, sizeof(un)))
     77 		perror_msg_and_skip("connect");
     78 
     79 	int afd = accept(lfd, 0, 0);
     80 	if (afd < 0)
     81 		perror_msg_and_skip("accept");
     82 
     83 	(void) unlink(un.sun_path);
     84 
     85 	test_sockname_syscall(afd);
     86 
     87 	puts("+++ exited with 0 +++");
     88 	return 0;
     89 }
     90