| | 1 | /* |
| | 2 | * This file is part of DisOrder |
| | 3 | * Copyright (C) 2007 Richard Kettlewell |
| | 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 | */ |
| | 20 | |
| | 21 | #include <config.h> |
| | 22 | #include "types.h" |
| | 23 | |
| | 24 | #include <getopt.h> |
| | 25 | #include <sys/types.h> |
| | 26 | #include <sys/socket.h> |
| | 27 | #include <netinet/in.h> |
| | 28 | #include <errno.h> |
| | 29 | #include <locale.h> |
| | 30 | #include <netdb.h> |
| | 31 | #include <unistd.h> |
| | 32 | #include <ctype.h> |
| | 33 | |
| | 34 | #include "configuration.h" |
| | 35 | #include "syscalls.h" |
| | 36 | #include "log.h" |
| | 37 | #include "addr.h" |
| | 38 | #include "defs.h" |
| | 39 | #include "mem.h" |
| | 40 | |
| | 41 | static const struct option options[] = { |
| | 42 | { "help", no_argument, 0, 'h' }, |
| | 43 | { "version", no_argument, 0, 'V' }, |
| | 44 | { "output", required_argument, 0, 'o' }, |
| | 45 | { 0, 0, 0, 0 } |
| | 46 | }; |
| | 47 | |
| | 48 | /* display usage message and terminate */ |
| | 49 | static void help(void) { |
| | 50 | xprintf("Usage:\n" |
| | 51 | " disorder-udplog [OPTIONS] ADDRESS PORT\n" |
| | 52 | "Options:\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" |
| | 56 | "\n" |
| | 57 | "UDP packet receiver.\n"); |
| | 58 | xfclose(stdout); |
| | 59 | exit(0); |
| | 60 | } |
| | 61 | |
| | 62 | /* display version number and terminate */ |
| | 63 | static void version(void) { |
| | 64 | xprintf("%s", disorder_version_string); |
| | 65 | xfclose(stdout); |
| | 66 | exit(0); |
| | 67 | } |
| | 68 | |
| | 69 | int main(int argc, char **argv) { |
| | 70 | int n, fd, err, i, j; |
| | 71 | struct addrinfo *ai; |
| | 72 | struct stringlist a; |
| | 73 | char *name, h[4096], s[4096]; |
| | 74 | uint8_t buffer[4096]; |
| | 75 | union { |
| | 76 | struct sockaddr sa; |
| | 77 | struct sockaddr_in sin; |
| | 78 | struct sockaddr_in6 sin6; |
| | 79 | } sa; |
| | 80 | socklen_t len; |
| | 81 | fd_set fds; |
| | 82 | struct timeval tv; |
| | 83 | static const struct addrinfo pref = { |
| | 84 | 0, /* ai_flags */ |
| | 85 | AF_UNSPEC, /* ai_family */ |
| | 86 | SOCK_DGRAM, /* ai_socktype */ |
| | 87 | IPPROTO_UDP, /* ai_protocol */ |
| | 88 | 0, |
| | 89 | 0, |
| | 90 | 0, |
| | 91 | 0 |
| | 92 | }; |
| | 93 | |
| | 94 | set_progname(argv); |
| | 95 | mem_init(); |
| | 96 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); |
| | 97 | while((n = getopt_long(argc, argv, "hVo:", options, 0)) >= 0) { |
| | 98 | switch(n) { |
| | 99 | case 'h': help(); |
| | 100 | case 'V': version(); |
| | 101 | case 'o': |
| | 102 | if(!freopen(optarg, "w", stdout)) |
| | 103 | fatal(errno, "%s", optarg); |
| | 104 | break; |
| | 105 | default: fatal(0, "invalid option"); |
| | 106 | } |
| | 107 | } |
| | 108 | if(optind + 2 != argc) |
| | 109 | fatal(0, "missing arguments"); |
| | 110 | a.n = 2; |
| | 111 | a.s = &argv[optind]; |
| | 112 | if(!(ai = get_address(&a, &pref, &name))) |
| | 113 | exit(1); |
| | 114 | fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); |
| | 115 | nonblock(fd); |
| | 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. */ |
| | 121 | FD_ZERO(&fds); |
| | 122 | FD_SET(fd, &fds); |
| | 123 | tv.tv_sec = 1; |
| | 124 | tv.tv_usec = 0; |
| | 125 | select(fd + 1, &fds, 0, 0, &tv); |
| | 126 | len = sizeof sa; |
| | 127 | n = recvfrom(fd, buffer, sizeof buffer, 0, &sa.sa, &len); |
| | 128 | if(n < 0) { |
| | 129 | if(errno == EINTR || errno == EAGAIN) |
| | 130 | continue; |
| | 131 | fatal(errno, "%s: recvfrom", name); |
| | 132 | } |
| | 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) |
| | 141 | xprintf(" "); |
| | 142 | xprintf(" "); |
| | 143 | for(j = i; j < n && j < i + 16; ++j) |
| | 144 | xprintf("%c", buffer[j] < 128 && isprint(buffer[j]) ? buffer[j] : '.'); |
| | 145 | xprintf("\n"); |
| | 146 | if(fflush(stdout) < 0) |
| | 147 | fatal(errno, "stdout"); |
| | 148 | } |
| | 149 | } |
| | 150 | return 0; |
| | 151 | } |
| | 152 | |
| | 153 | /* |
| | 154 | Local Variables: |
| | 155 | c-basic-offset:2 |
| | 156 | comment-column:40 |
| | 157 | fill-column:79 |
| | 158 | indent-tabs-mode:nil |
| | 159 | End: |
| | 160 | */ |
~mdw / disorder / blame_incremental