2 * This file is part of DisOrder
3 * Copyright (C) 2007-2009 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 /** @file tests/udplog.c
21 * @brief UDP logging utility
23 * Intended for low-level debugging.
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <netinet/in.h>
37 #include "configuration.h"
44 static const struct option options[] = {
45 { "help", no_argument, 0, 'h' },
46 { "version", no_argument, 0, 'V' },
47 { "output", required_argument, 0, 'o' },
51 /* display usage message and terminate */
52 static void help(void) {
54 " disorder-udplog [OPTIONS] ADDRESS PORT\n"
56 " --output, -o PATH Output to PATH (default: stdout)\n"
57 " --help, -h Display usage message\n"
58 " --version, -V Display version number\n"
60 "UDP packet receiver.\n");
65 /* display version number and terminate */
66 static void version(void) {
67 xprintf("%s", disorder_version_string);
72 int main(int argc, char **argv) {
76 char *name, h[4096], s[4096];
80 struct sockaddr_in sin;
81 struct sockaddr_in6 sin6;
86 static const struct addrinfo pref = {
88 .ai_family = AF_UNSPEC,
89 .ai_socktype = SOCK_DGRAM,
90 .ai_protocol = IPPROTO_UDP,
95 if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "error calling setlocale");
96 while((n = getopt_long(argc, argv, "hVo:", options, 0)) >= 0) {
101 if(!freopen(optarg, "w", stdout))
102 disorder_fatal(errno, "%s", optarg);
104 default: disorder_fatal(0, "invalid option");
107 if(optind + 2 != argc)
108 disorder_fatal(0, "missing arguments");
111 if(!(ai = get_address(&a, &pref, &name)))
113 fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
115 if(bind(fd, ai->ai_addr, ai->ai_addrlen) < 0)
116 disorder_fatal(errno, "error binding to %s", name);
117 while(getppid() != 1) {
118 /* Wait for something to happen. We don't just block forever in recvfrom()
119 * as otherwise we'd never die if the parent terminated uncontrolledly. */
124 select(fd + 1, &fds, 0, 0, &tv);
126 n = recvfrom(fd, buffer, sizeof buffer, 0, &sa.sa, &len);
128 if(errno == EINTR || errno == EAGAIN)
130 disorder_fatal(errno, "%s: recvfrom", name);
132 if((err = getnameinfo(&sa.sa, len, h, sizeof h, s, sizeof s,
133 NI_NUMERICHOST|NI_NUMERICSERV|NI_DGRAM)))
134 disorder_fatal(0, "getnameinfo: %s", gai_strerror(err));
135 xprintf("from host %s service %s: %d bytes\n", h, s, n);
136 for(i = 0; i < n; i += 16) {
137 const int limit = n > i + 16 ? i + 16 : n;
138 for(j = i; j < limit; ++j)
139 xprintf(" %02x", buffer[j]);
140 for(; j < i + 16; ++j)
143 for(j = i; j < limit; ++j)
144 xprintf("%c", buffer[j] < 128 && isprint(buffer[j]) ? buffer[j] : '.');
146 if(fflush(stdout) < 0)
147 disorder_fatal(errno, "stdout");