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6ce6b5a9 RK |
1 | /* |
2 | * This file is part of DisOrder | |
8a886602 | 3 | * Copyright (C) 2007-2009 Richard Kettlewell |
6ce6b5a9 RK |
4 | * |
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. | |
9 | * | |
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. | |
14 | * | |
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 | |
18 | * USA | |
19 | */ | |
132a5a4a RK |
20 | /** @file tests/udplog.c |
21 | * @brief UDP logging utility | |
22 | * | |
23 | * Intended for low-level debugging. | |
24 | */ | |
05b75f8d | 25 | #include "common.h" |
6ce6b5a9 RK |
26 | |
27 | #include <getopt.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/socket.h> | |
30 | #include <netinet/in.h> | |
31 | #include <errno.h> | |
32 | #include <locale.h> | |
33 | #include <netdb.h> | |
34 | #include <unistd.h> | |
35 | #include <ctype.h> | |
36 | ||
37 | #include "configuration.h" | |
38 | #include "syscalls.h" | |
39 | #include "log.h" | |
40 | #include "addr.h" | |
41 | #include "defs.h" | |
42 | #include "mem.h" | |
43 | ||
44 | static const struct option options[] = { | |
45 | { "help", no_argument, 0, 'h' }, | |
46 | { "version", no_argument, 0, 'V' }, | |
47 | { "output", required_argument, 0, 'o' }, | |
48 | { 0, 0, 0, 0 } | |
49 | }; | |
50 | ||
51 | /* display usage message and terminate */ | |
52 | static void help(void) { | |
53 | xprintf("Usage:\n" | |
54 | " disorder-udplog [OPTIONS] ADDRESS PORT\n" | |
55 | "Options:\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" | |
59 | "\n" | |
60 | "UDP packet receiver.\n"); | |
61 | xfclose(stdout); | |
62 | exit(0); | |
63 | } | |
64 | ||
65 | /* display version number and terminate */ | |
66 | static void version(void) { | |
a05e4467 | 67 | xprintf("%s", disorder_version_string); |
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68 | xfclose(stdout); |
69 | exit(0); | |
70 | } | |
71 | ||
72 | int main(int argc, char **argv) { | |
73 | int n, fd, err, i, j; | |
74 | struct addrinfo *ai; | |
75 | struct stringlist a; | |
76 | char *name, h[4096], s[4096]; | |
77 | uint8_t buffer[4096]; | |
78 | union { | |
79 | struct sockaddr sa; | |
80 | struct sockaddr_in sin; | |
81 | struct sockaddr_in6 sin6; | |
82 | } sa; | |
83 | socklen_t len; | |
95ceb9ea RK |
84 | fd_set fds; |
85 | struct timeval tv; | |
6ce6b5a9 | 86 | static const struct addrinfo pref = { |
66613034 RK |
87 | .ai_flags = 0, |
88 | .ai_family = AF_UNSPEC, | |
89 | .ai_socktype = SOCK_DGRAM, | |
90 | .ai_protocol = IPPROTO_UDP, | |
6ce6b5a9 RK |
91 | }; |
92 | ||
93 | set_progname(argv); | |
94 | mem_init(); | |
2e9ba080 | 95 | if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "error calling setlocale"); |
6ce6b5a9 RK |
96 | while((n = getopt_long(argc, argv, "hVo:", options, 0)) >= 0) { |
97 | switch(n) { | |
98 | case 'h': help(); | |
99 | case 'V': version(); | |
100 | case 'o': | |
101 | if(!freopen(optarg, "w", stdout)) | |
2e9ba080 | 102 | disorder_fatal(errno, "%s", optarg); |
6ce6b5a9 | 103 | break; |
2e9ba080 | 104 | default: disorder_fatal(0, "invalid option"); |
6ce6b5a9 RK |
105 | } |
106 | } | |
107 | if(optind + 2 != argc) | |
2e9ba080 | 108 | disorder_fatal(0, "missing arguments"); |
6ce6b5a9 RK |
109 | a.n = 2; |
110 | a.s = &argv[optind]; | |
111 | if(!(ai = get_address(&a, &pref, &name))) | |
112 | exit(1); | |
113 | fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
95ceb9ea | 114 | nonblock(fd); |
6ce6b5a9 | 115 | if(bind(fd, ai->ai_addr, ai->ai_addrlen) < 0) |
2e9ba080 | 116 | disorder_fatal(errno, "error binding to %s", name); |
6ce6b5a9 | 117 | while(getppid() != 1) { |
95ceb9ea RK |
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. */ | |
120 | FD_ZERO(&fds); | |
121 | FD_SET(fd, &fds); | |
122 | tv.tv_sec = 1; | |
123 | tv.tv_usec = 0; | |
124 | select(fd + 1, &fds, 0, 0, &tv); | |
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125 | len = sizeof sa; |
126 | n = recvfrom(fd, buffer, sizeof buffer, 0, &sa.sa, &len); | |
127 | if(n < 0) { | |
128 | if(errno == EINTR || errno == EAGAIN) | |
129 | continue; | |
2e9ba080 | 130 | disorder_fatal(errno, "%s: recvfrom", name); |
6ce6b5a9 RK |
131 | } |
132 | if((err = getnameinfo(&sa.sa, len, h, sizeof h, s, sizeof s, | |
133 | NI_NUMERICHOST|NI_NUMERICSERV|NI_DGRAM))) | |
2e9ba080 | 134 | disorder_fatal(0, "getnameinfo: %s", gai_strerror(err)); |
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135 | xprintf("from host %s service %s: %d bytes\n", h, s, n); |
136 | for(i = 0; i < n; i += 16) { | |
137 | for(j = i; j < n && j < i + 16; ++j) | |
138 | xprintf(" %02x", buffer[j]); | |
139 | for(; j < i + 16; ++j) | |
140 | xprintf(" "); | |
141 | xprintf(" "); | |
142 | for(j = i; j < n && j < i + 16; ++j) | |
143 | xprintf("%c", buffer[j] < 128 && isprint(buffer[j]) ? buffer[j] : '.'); | |
144 | xprintf("\n"); | |
145 | if(fflush(stdout) < 0) | |
2e9ba080 | 146 | disorder_fatal(errno, "stdout"); |
6ce6b5a9 RK |
147 | } |
148 | } | |
149 | return 0; | |
150 | } | |
151 | ||
152 | /* | |
153 | Local Variables: | |
154 | c-basic-offset:2 | |
155 | comment-column:40 | |
156 | fill-column:79 | |
157 | indent-tabs-mode:nil | |
158 | End: | |
159 | */ |