2 * Copyright (c) 2004 Robert N. M. Watson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/types.h>
30 #include <sys/socket.h>
33 #include <netinet/in.h>
35 #include <arpa/inet.h>
45 fprintf(stderr, "netreceive [port]\n");
50 main(int argc, char *argv[])
52 struct sockaddr_in sin;
60 bzero(&sin, sizeof(sin));
61 sin.sin_len = sizeof(sin);
62 sin.sin_family = AF_INET;
63 sin.sin_addr.s_addr = htonl(INADDR_ANY);
65 port = strtoul(argv[1], &dummy, 10);
66 if (port < 1 || port > 65535 || *dummy != '\0')
68 sin.sin_port = htons(port);
70 packet = malloc(65536);
77 s = socket(PF_INET, SOCK_DGRAM, 0);
84 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &v, sizeof(v)) < 0) {
89 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
94 printf("netreceive listening on UDP port %d\n", (u_short)port);
97 if (recv(s, packet, 65536, 0) < 0)