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broadcast_bind.c revision 1.1 
      1 /* $OpenBSD: broadcast_bind.c,v 1.2 2015/12/02 20:45:00 mpi Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2015 Vincent Gross <vgross (at) openbsd.org>
      5  *
      6  * Permission to use, copy, modify, and distribute this software for any
      7  * purpose with or without fee is hereby granted, provided that the above
      8  * copyright notice and this permission notice appear in all copies.
      9  *
     10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     17  */
     18 
     19 #include <err.h>
     20 #include <errno.h>
     21 #include <stdio.h>
     22 #include <unistd.h>
     23 #include <stdlib.h>
     24 #include <string.h>
     25 
     26 #include <arpa/inet.h>
     27 
     28 #include <sys/socket.h>
     29 
     30 #include <netinet/in.h>
     31 
     32 
     33 int
     34 test_bind(char *paddr, struct in_addr *addr, u_int16_t port, int type,
     35     int expected_errno)
     36 {
     37 	int s, rc;
     38 	struct sockaddr_in sin;
     39 
     40 	memset(&sin, 0, sizeof(sin));
     41 	sin.sin_family = AF_INET;
     42 	sin.sin_len = sizeof(sin);
     43 	sin.sin_port = htons(port);
     44 	memcpy(&sin.sin_addr, addr, sizeof(*addr));
     45 
     46 	s = socket(PF_INET, type, 0);
     47 	if (s < 0) {
     48 		warn("socket(PF_INET, %d, 0)", type);
     49 		return (1);
     50 	}
     51 
     52 	rc = bind(s, (struct sockaddr *)&sin, sin.sin_len);
     53 	if ((rc == 0 && expected_errno == 0) ||
     54 	    (rc != 0 && expected_errno == errno)) {
     55 		close(s);
     56 		return (0);
     57 	}
     58 
     59 	warn("bind(%s,%d) (type %d) expected %d, got %d", paddr, port, type,
     60 	    expected_errno, errno);
     61 	close(s);
     62 
     63 	return (1);
     64 }
     65 
     66 int
     67 main(int argc, char *argv[])
     68 {
     69 	int rc;
     70 	struct in_addr uc_addr, err_addr, bc_addr;
     71 	int port = 30000;
     72 
     73 	if (argc != 4)
     74 		errx(1, "needs 2 arguments: <unicast> <error> <broadcast>");
     75 
     76 	rc = inet_pton(AF_INET, argv[1], &uc_addr);
     77 	if (rc != 1) {
     78 		if (rc)
     79 			err(1, "inet_pton(unicast)");
     80 		else
     81 			errx(1, "inet_pton(unicast): error parsing %s",
     82 			    argv[1]);
     83 	}
     84 	rc = inet_pton(AF_INET, argv[2], &err_addr);
     85 	if (rc != 1) {
     86 		if (rc)
     87 			err(1, "inet_pton(error)");
     88 		else
     89 			errx(1, "inet_pton(error): error parsing %s", argv[2]);
     90 	}
     91 	rc = inet_pton(AF_INET, argv[3], &bc_addr);
     92 	if (rc != 1) {
     93 		if (rc)
     94 			err(1, "inet_pton(broadcast)");
     95 		else
     96 			errx(1, "inet_pton(broadcast): error parsing %s",
     97 			    argv[3]);
     98 	}
     99 
    100 	rc = 0;
    101 	rc |= test_bind(argv[1], &uc_addr, port, SOCK_STREAM, 0);
    102 	rc |= test_bind(argv[2], &err_addr, port, SOCK_STREAM, EADDRNOTAVAIL);
    103 	rc |= test_bind(argv[3], &bc_addr, port, SOCK_STREAM, EADDRNOTAVAIL);
    104 
    105 	rc |= test_bind(argv[2], &err_addr, port, SOCK_STREAM, EADDRNOTAVAIL);
    106 	rc |= test_bind(argv[3], &bc_addr, port, SOCK_DGRAM, 0);
    107 
    108 	return (rc);
    109 }
    110