107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
/*
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* Copyright 1990-1996 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
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* the contents of this file may not be disclosed to third parties, copied or
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* duplicated in any form, in whole or in part, without the prior written
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* permission of Silicon Graphics, Inc.
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*
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* RESTRICTED RIGHTS LEGEND:
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* Use, duplication or disclosure by the Government is subject to restrictions
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* as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
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* and Computer Software clause at DFARS 252.227-7013, and/or in similar or
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* successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
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* rights reserved under the Copyright Laws of the United States.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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/* ARGSUSED */
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void
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ahand(int sig)
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{
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exit(0);
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}
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void
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usage(void)
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{
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fprintf(stderr,"usage: udprecv [-i secs] [port]\n");
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exit(1);
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}
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void
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error(char *s)
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{
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perror(s);
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exit(1);
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}
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char buf[BUFSIZ];
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main(int argc, char **argv)
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{
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int s;
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int r;
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struct sockaddr_in sin;
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int sinlen;
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int port;
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int c;
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int secs = 300;
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while ((c = getopt(argc, argv, "i:")) != EOF) {
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switch (c) {
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case 'i':
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secs = atoi(optarg);
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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port = htons(atoi(argv[0]));
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} else {
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port = htons(9999);
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}
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signal(SIGALRM, ahand);
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alarm(secs);
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while (1) {
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s = socket(AF_INET, SOCK_DGRAM, 0);
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if (s < 0) {
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error("socket");
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}
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sin.sin_family = AF_INET;
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sin.sin_port = port;
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sin.sin_addr.s_addr = htonl(INADDR_ANY);
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r = bind(s, (struct sockaddr *)&sin, sizeof(sin));
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if (r < 0) {
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error("bind");
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}
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sinlen = sizeof(sin);
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r = recvfrom(s, buf, sizeof(buf), 0, &sin,
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&sinlen);
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if (r < 0) {
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error("recvfrom");
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}
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close(s);
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}
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/* NOTREACHED */
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exit(0);
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}
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