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 .ai_family
= AF_UNSPEC
,
86 .ai_socktype
= SOCK_DGRAM
,
87 .ai_protocol
= IPPROTO_UDP
,
92 if(!setlocale(LC_CTYPE
, "")) fatal(errno
, "error calling setlocale");
93 while((n
= getopt_long(argc
, argv
, "hVo:", options
, 0)) >= 0) {
98 if(!freopen(optarg
, "w", stdout
))
99 fatal(errno
, "%s", optarg
);
101 default: fatal(0, "invalid option");
104 if(optind
+ 2 != argc
)
105 fatal(0, "missing arguments");
108 if(!(ai
= get_address(&a
, &pref
, &name
)))
110 fd
= xsocket(ai
->ai_family
, ai
->ai_socktype
, ai
->ai_protocol
);
112 if(bind(fd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)
113 fatal(errno
, "error binding to %s", name
);
114 while(getppid() != 1) {
115 /* Wait for something to happen. We don't just block forever in recvfrom()
116 * as otherwise we'd never die if the parent terminated uncontrolledly. */
121 select(fd
+ 1, &fds
, 0, 0, &tv
);
123 n
= recvfrom(fd
, buffer
, sizeof buffer
, 0, &sa
.sa
, &len
);
125 if(errno
== EINTR
|| errno
== EAGAIN
)
127 fatal(errno
, "%s: recvfrom", name
);
129 if((err
= getnameinfo(&sa
.sa
, len
, h
, sizeof h
, s
, sizeof s
,
130 NI_NUMERICHOST
|NI_NUMERICSERV
|NI_DGRAM
)))
131 fatal(0, "getnameinfo: %s", gai_strerror(err
));
132 xprintf("from host %s service %s: %d bytes\n", h
, s
, n
);
133 for(i
= 0; i
< n
; i
+= 16) {
134 for(j
= i
; j
< n
&& j
< i
+ 16; ++j
)
135 xprintf(" %02x", buffer
[j
]);
136 for(; j
< i
+ 16; ++j
)
139 for(j
= i
; j
< n
&& j
< i
+ 16; ++j
)
140 xprintf("%c", buffer
[j
] < 128 && isprint(buffer
[j
]) ? buffer
[j
] : '.');
142 if(fflush(stdout
) < 0)
143 fatal(errno
, "stdout");