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 * Copyright (c) 2016-2017 The strace developers. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "tests.h" 32 #include <assert.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include <sys/socket.h> 36 #include <sys/wait.h> 37 38 static void 39 transpose(char *str, int len) 40 { 41 int i; 42 43 for (i = 0; i < len / 2; ++i) { 44 char c = str[i]; 45 str[i] = str[len - 1 - i]; 46 str[len - 1 - i] = c; 47 } 48 } 49 50 int 51 main(int ac, char **av) 52 { 53 assert(ac == 2); 54 const int len = strlen(av[1]); 55 assert(len); 56 57 (void) close(0); 58 (void) close(1); 59 60 int sv[2]; 61 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 62 perror_msg_and_skip("socketpair"); 63 64 pid_t pid = fork(); 65 if (pid < 0) 66 perror_msg_and_fail("fork"); 67 68 if (pid) { 69 assert(close(1) == 0); 70 transpose(av[1], len); 71 assert(sendto(0, av[1], len, MSG_DONTROUTE, NULL, 0) == len); 72 assert(recvfrom(0, av[1], len, MSG_WAITALL, NULL, NULL) == len); 73 assert(close(0) == 0); 74 75 int status; 76 assert(waitpid(pid, &status, 0) == pid); 77 assert(status == 0); 78 } else { 79 assert(close(0) == 0); 80 assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == len); 81 transpose(av[1], len); 82 assert(sendto(1, av[1], len, MSG_DONTROUTE, NULL, 0) == len); 83 assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == 0); 84 assert(close(1) == 0); 85 } 86 87 return 0; 88 } 89
