1/* $NetBSD: broadcast_bind.c,v 1.2 2022/11/17 08:42:06 ozaki-r Exp $ */ 2/* $OpenBSD: broadcast_bind.c,v 1.2 2015/12/02 20:45:00 mpi Exp $ */ 3 4/* 5 * Copyright (c) 2015 Vincent Gross <vgross@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20#include <err.h> 21#include <errno.h> 22#include <stdio.h> 23#include <unistd.h> 24#include <stdlib.h> 25#include <string.h> 26 27#include <arpa/inet.h> 28 29#include <sys/socket.h> 30 31#include <netinet/in.h> 32 33 34static int 35test_bind(char *paddr, struct in_addr *addr, u_int16_t port, int type, 36 int expected_errno) 37{ 38 int s, rc; 39 struct sockaddr_in sin; 40 41 memset(&sin, 0, sizeof(sin)); 42 sin.sin_family = AF_INET; 43 sin.sin_len = sizeof(sin); 44 sin.sin_port = htons(port); 45 memcpy(&sin.sin_addr, addr, sizeof(*addr)); 46 47 s = socket(PF_INET, type, 0); 48 if (s < 0) { 49 warn("socket(PF_INET, %d, 0)", type); 50 return (1); 51 } 52 53 rc = bind(s, (struct sockaddr *)&sin, sin.sin_len); 54 if ((rc == 0 && expected_errno == 0) || 55 (rc != 0 && expected_errno == errno)) { 56 close(s); 57 return (0); 58 } 59 60 warn("bind(%s,%d) (type %d) expected %d, got %d", paddr, port, type, 61 expected_errno, errno); 62 close(s); 63 64 return (1); 65} 66 67int 68main(int argc, char *argv[]) 69{ 70 int rc; 71 struct in_addr uc_addr, err_addr, bc_addr; 72 int port = 30000; 73 74 if (argc != 4) 75 errx(1, "needs 2 arguments: <unicast> <error> <broadcast>"); 76 77 rc = inet_pton(AF_INET, argv[1], &uc_addr); 78 if (rc != 1) { 79 if (rc) 80 err(1, "inet_pton(unicast)"); 81 else 82 errx(1, "inet_pton(unicast): error parsing %s", 83 argv[1]); 84 } 85 rc = inet_pton(AF_INET, argv[2], &err_addr); 86 if (rc != 1) { 87 if (rc) 88 err(1, "inet_pton(error)"); 89 else 90 errx(1, "inet_pton(error): error parsing %s", argv[2]); 91 } 92 rc = inet_pton(AF_INET, argv[3], &bc_addr); 93 if (rc != 1) { 94 if (rc) 95 err(1, "inet_pton(broadcast)"); 96 else 97 errx(1, "inet_pton(broadcast): error parsing %s", 98 argv[3]); 99 } 100 101 rc = 0; 102 rc |= test_bind(argv[1], &uc_addr, port, SOCK_STREAM, 0); 103 rc |= test_bind(argv[2], &err_addr, port, SOCK_STREAM, EADDRNOTAVAIL); 104#ifdef __NetBSD__ 105 rc |= test_bind(argv[3], &bc_addr, port, SOCK_STREAM, 0); 106#else 107 rc |= test_bind(argv[3], &bc_addr, port, SOCK_STREAM, EADDRNOTAVAIL); 108#endif 109 110 rc |= test_bind(argv[2], &err_addr, port, SOCK_STREAM, EADDRNOTAVAIL); 111 rc |= test_bind(argv[3], &bc_addr, port, SOCK_DGRAM, 0); 112 113 return (rc); 114} 115