1 /* 2 * Check decoding and dumping of sendto and recvfrom syscalls. 3 * 4 * Copyright (c) 2015-2016 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 #include "tests.h" 31 #include <assert.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <sys/socket.h> 35 #include <sys/wait.h> 36 37 static void 38 transpose(char *str, int len) 39 { 40 int i; 41 42 for (i = 0; i < len / 2; ++i) { 43 char c = str[i]; 44 str[i] = str[len - 1 - i]; 45 str[len - 1 - i] = c; 46 } 47 } 48 49 int 50 main(int ac, char **av) 51 { 52 assert(ac == 2); 53 const int len = strlen(av[1]); 54 assert(len); 55 56 (void) close(0); 57 (void) close(1); 58 59 int sv[2]; 60 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 61 perror_msg_and_skip("socketpair"); 62 63 pid_t pid = fork(); 64 if (pid < 0) 65 perror_msg_and_fail("fork"); 66 67 if (pid) { 68 assert(close(1) == 0); 69 transpose(av[1], len); 70 assert(sendto(0, av[1], len, MSG_DONTROUTE, NULL, 0) == len); 71 assert(recvfrom(0, av[1], len, MSG_WAITALL, NULL, NULL) == len); 72 assert(close(0) == 0); 73 74 int status; 75 assert(waitpid(pid, &status, 0) == pid); 76 assert(status == 0); 77 } else { 78 assert(close(0) == 0); 79 assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == len); 80 transpose(av[1], len); 81 assert(sendto(1, av[1], len, MSG_DONTROUTE, NULL, 0) == len); 82 assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == 0); 83 assert(close(1) == 0); 84 } 85 86 return 0; 87 } 88
