2 * This file is part of DisOrder
3 * Copyright (C) 2007 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
25 #include <sys/types.h>
26 #include <sys/socket.h>
27 #include <netinet/in.h>
34 #include "configuration.h"
41 static const struct option options
[] = {
42 { "help", no_argument
, 0, 'h' },
43 { "version", no_argument
, 0, 'V' },
44 { "output", required_argument
, 0, 'o' },
48 /* display usage message and terminate */
49 static void help(void) {
51 " disorder-udplog [OPTIONS] ADDRESS PORT\n"
53 " --output, -o PATH Output to PATH (default: stdout)\n"
54 " --help, -h Display usage message\n"
55 " --version, -V Display version number\n"
57 "UDP packet receiver.\n");
62 /* display version number and terminate */
63 static void version(void) {
64 xprintf("%s", disorder_version_string
);
69 int main(int argc
, char **argv
) {
73 char *name
, h
[4096], s
[4096];
77 struct sockaddr_in sin
;
78 struct sockaddr_in6 sin6
;
83 static const struct addrinfo pref
= {
85 AF_UNSPEC
, /* ai_family */
86 SOCK_DGRAM
, /* ai_socktype */
87 IPPROTO_UDP
, /* ai_protocol */
96 if(!setlocale(LC_CTYPE
, "")) fatal(errno
, "error calling setlocale");
97 while((n
= getopt_long(argc
, argv
, "hVo:", options
, 0)) >= 0) {
102 if(!freopen(optarg
, "w", stdout
))
103 fatal(errno
, "%s", optarg
);
105 default: fatal(0, "invalid option");
108 if(optind
+ 2 != argc
)
109 fatal(0, "missing arguments");
112 if(!(ai
= get_address(&a
, &pref
, &name
)))
114 fd
= xsocket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
);
116 if(bind(fd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)
117 fatal(errno
, "error binding to %s", name
);
118 while(getppid() != 1) {
119 /* Wait for something to happen. We don't just block forever in recvfrom()
120 * as otherwise we'd never die if the parent terminated uncontrolledly. */
125 select(fd
+ 1, &fds
, 0, 0, &tv
);
127 n
= recvfrom(fd
, buffer
, sizeof buffer
, 0, &sa
.sa
, &len
);
129 if(errno
== EINTR
|| errno
== EAGAIN
)
131 fatal(errno
, "%s: recvfrom", name
);
133 if((err
= getnameinfo(&sa
.sa
, len
, h
, sizeof h
, s
, sizeof s
,
134 NI_NUMERICHOST
|NI_NUMERICSERV
|NI_DGRAM
)))
135 fatal(0, "getnameinfo: %s", gai_strerror(err
));
136 xprintf("from host %s service %s: %d bytes\n", h
, s
, n
);
137 for(i
= 0; i
< n
; i
+= 16) {
138 for(j
= i
; j
< n
&& j
< i
+ 16; ++j
)
139 xprintf(" %02x", buffer
[j
]);
140 for(; j
< i
+ 16; ++j
)
143 for(j
= i
; j
< n
&& j
< i
+ 16; ++j
)
144 xprintf("%c", buffer
[j
] < 128 && isprint(buffer
[j
]) ? buffer
[j
] : '.');
146 if(fflush(stdout
) < 0)
147 fatal(errno
, "stdout");