Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 2 | /* The main method to drive it as a standalone process */ |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 3 | |
| 4 | /* |
| 5 | * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | 276b1df | 2010-02-03 18:10:07 +0100 | [diff] [blame] | 6 | * (C) 2009 by On-Waves |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <ctype.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <time.h> |
| 30 | #include <limits.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include <sys/socket.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 34 | |
| 35 | #include <openbsc/debug.h> |
Harald Welte | f4625b1 | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 36 | #include <osmocore/msgb.h> |
| 37 | #include <osmocore/talloc.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 38 | #include <openbsc/gsm_data.h> |
Harald Welte | f4625b1 | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 39 | #include <osmocore/select.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 40 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 3adc628 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 41 | #include <openbsc/telnet_interface.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 42 | |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 43 | #include "../../bscconfig.h" |
| 44 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 45 | /* this is here for the vty... it will never be called */ |
| 46 | void subscr_put() { abort(); } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 47 | |
| 48 | #define _GNU_SOURCE |
| 49 | #include <getopt.h> |
| 50 | |
| 51 | #warning "Make use of the rtp proxy code" |
| 52 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 53 | static struct bsc_fd bfd; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 54 | static int first_request = 1; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 55 | static struct mgcp_config *cfg; |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 56 | const char *openbsc_version = "OpenBSC MGCP " PACKAGE_VERSION; |
| 57 | const char *openbsc_copyright = |
| 58 | "Copyright (C) 2009-2010 Holger Freyther and On-Waves\n" |
| 59 | "Contributions by Daniel Willmann, Jan Lübbe,Stefan Schmidt\n" |
| 60 | "Dieter Spaar, Andreas Eversberg, Harald Welte\n\n" |
| 61 | "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n" |
| 62 | "This is free software: you are free to change and redistribute it.\n" |
| 63 | "There is NO WARRANTY, to the extent permitted by law.\n"; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 64 | |
| 65 | static char *config_file = "mgcp.cfg"; |
| 66 | |
| 67 | /* used by msgb and mgcp */ |
| 68 | void *tall_bsc_ctx = NULL; |
| 69 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 70 | static void print_help() |
| 71 | { |
| 72 | printf("Some useful help...\n"); |
| 73 | printf(" -h --help is printing this text.\n"); |
| 74 | printf(" -c --config-file filename The config file to use.\n"); |
| 75 | } |
| 76 | |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 77 | static void print_version() |
| 78 | { |
| 79 | printf("%s\n\n", openbsc_version); |
| 80 | printf(openbsc_copyright); |
| 81 | } |
| 82 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 83 | static void handle_options(int argc, char** argv) |
| 84 | { |
| 85 | while (1) { |
| 86 | int option_index = 0, c; |
| 87 | static struct option long_options[] = { |
| 88 | {"help", 0, 0, 'h'}, |
| 89 | {"config-file", 1, 0, 'c'}, |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 90 | {"version", 0, 0, 'V'}, |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 91 | {0, 0, 0, 0}, |
| 92 | }; |
| 93 | |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 94 | c = getopt_long(argc, argv, "hc:V", long_options, &option_index); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 95 | |
| 96 | if (c == -1) |
| 97 | break; |
| 98 | |
| 99 | switch(c) { |
| 100 | case 'h': |
| 101 | print_help(); |
| 102 | exit(0); |
| 103 | break; |
| 104 | case 'c': |
| 105 | config_file = talloc_strdup(tall_bsc_ctx, optarg); |
| 106 | break; |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 107 | case 'V': |
| 108 | print_version(); |
| 109 | exit(0); |
| 110 | break; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 111 | default: |
| 112 | /* ignore */ |
| 113 | break; |
| 114 | }; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | static int read_call_agent(struct bsc_fd *fd, unsigned int what) |
| 119 | { |
| 120 | struct sockaddr_in addr; |
| 121 | socklen_t slen = sizeof(addr); |
| 122 | struct msgb *msg; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 123 | struct msgb *resp; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 124 | |
| 125 | msg = (struct msgb *) fd->data; |
| 126 | |
| 127 | /* read one less so we can use it as a \0 */ |
| 128 | int rc = recvfrom(bfd.fd, msg->data, msg->data_len - 1, 0, |
| 129 | (struct sockaddr *) &addr, &slen); |
| 130 | if (rc < 0) { |
| 131 | perror("Gateway failed to read"); |
| 132 | return -1; |
| 133 | } else if (slen > sizeof(addr)) { |
| 134 | fprintf(stderr, "Gateway received message from outerspace: %d %d\n", |
| 135 | slen, sizeof(addr)); |
| 136 | return -1; |
| 137 | } |
| 138 | |
| 139 | if (first_request) { |
| 140 | first_request = 0; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 141 | resp = mgcp_create_rsip(); |
| 142 | |
| 143 | if (resp) { |
| 144 | sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, |
| 145 | (struct sockaddr *) &addr, sizeof(addr)); |
| 146 | msgb_free(resp); |
| 147 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | /* handle message now */ |
| 152 | msg->l2h = msgb_put(msg, rc); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 153 | resp = mgcp_handle_message(cfg, msg); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 154 | msgb_reset(msg); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 155 | |
| 156 | if (resp) { |
| 157 | sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr)); |
| 158 | msgb_free(resp); |
| 159 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 160 | return 0; |
| 161 | } |
| 162 | |
Holger Hans Peter Freyther | 089c7f5 | 2010-01-13 23:36:53 +0100 | [diff] [blame] | 163 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 164 | int main(int argc, char** argv) |
| 165 | { |
Holger Hans Peter Freyther | 3adc628 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 166 | struct gsm_network dummy_network; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 167 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 168 | int on = 1, rc; |
Holger Hans Peter Freyther | c8d862e | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 169 | struct debug_target *stderr_target; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 170 | |
| 171 | tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent"); |
Holger Hans Peter Freyther | c8d862e | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 172 | |
| 173 | debug_init(); |
| 174 | stderr_target = debug_target_create_stderr(); |
| 175 | debug_add_target(stderr_target); |
| 176 | debug_set_all_filter(stderr_target, 1); |
| 177 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 178 | cfg = mgcp_config_alloc(); |
| 179 | if (!cfg) |
| 180 | return -1; |
| 181 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 182 | handle_options(argc, argv); |
| 183 | |
Holger Hans Peter Freyther | 3adc628 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 184 | telnet_init(&dummy_network, 4243); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 185 | rc = mgcp_parse_config(config_file, cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 186 | if (rc < 0) |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 187 | return rc; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 188 | |
| 189 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 190 | /* we need to bind a socket */ |
| 191 | if (rc == 0) { |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 192 | bfd.when = BSC_FD_READ; |
| 193 | bfd.cb = read_call_agent; |
| 194 | bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 195 | if (bfd.fd < 0) { |
| 196 | perror("Gateway failed to listen"); |
| 197 | return -1; |
| 198 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 199 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 200 | setsockopt(bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 201 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 202 | memset(&addr, 0, sizeof(addr)); |
| 203 | addr.sin_family = AF_INET; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 204 | addr.sin_port = htons(cfg->source_port); |
| 205 | inet_aton(cfg->source_addr, &addr.sin_addr); |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 206 | |
| 207 | if (bind(bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| 208 | perror("Gateway failed to bind"); |
| 209 | return -1; |
| 210 | } |
| 211 | |
| 212 | bfd.data = msgb_alloc(4096, "mgcp-msg"); |
| 213 | if (!bfd.data) { |
| 214 | fprintf(stderr, "Gateway memory error.\n"); |
| 215 | return -1; |
| 216 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 217 | |
| 218 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 219 | if (bsc_register_fd(&bfd) != 0) { |
| 220 | DEBUGP(DMGCP, "Failed to register the fd\n"); |
| 221 | return -1; |
| 222 | } |
Holger Hans Peter Freyther | a5a1dde | 2010-01-05 12:25:25 +0100 | [diff] [blame] | 223 | |
| 224 | DEBUGP(DMGCP, "Configured for MGCP.\n"); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /* initialisation */ |
| 228 | srand(time(NULL)); |
| 229 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 230 | /* main loop */ |
| 231 | while (1) { |
| 232 | bsc_select_main(0); |
| 233 | } |
| 234 | |
| 235 | |
| 236 | return 0; |
| 237 | } |