Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 1 | /* minimalistic telnet/network interface it might turn into a wire interface */ |
| 2 | /* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 3 | * All Rights Reserved |
| 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, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <sys/socket.h> |
| 22 | #include <netinet/in.h> |
| 23 | #include <malloc.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include <openbsc/telnet_interface.h> |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 29 | #include <openbsc/gsm_subscriber.h> |
Holger Freyther | f87573d | 2009-01-04 03:49:41 +0000 | [diff] [blame] | 30 | #include <openbsc/chan_alloc.h> |
Holger Freyther | 3ae8fd2 | 2009-01-04 03:50:40 +0000 | [diff] [blame] | 31 | #include <openbsc/gsm_04_08.h> |
Holger Freyther | 868b8cd | 2009-01-04 03:57:27 +0000 | [diff] [blame] | 32 | #include <openbsc/msgb.h> |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 33 | #include <openbsc/abis_rsl.h> |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 34 | #include <openbsc/paging.h> |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 35 | |
| 36 | extern void telnet_parse(struct telnet_connection *connection, char *line); |
| 37 | |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 38 | #define WRITE_CONNECTION(fd, msg...) \ |
| 39 | int ret; \ |
| 40 | char buf[4096]; \ |
| 41 | snprintf(buf, sizeof(buf), msg); \ |
| 42 | ret = write(fd, buf, strlen(buf)); |
| 43 | |
| 44 | |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 45 | /* per connection data */ |
| 46 | LLIST_HEAD(active_connections); |
| 47 | |
| 48 | /* per network data */ |
| 49 | static int telnet_new_connection(struct bsc_fd *fd, unsigned int what); |
| 50 | static struct bsc_fd server_socket = { |
| 51 | .when = BSC_FD_READ, |
| 52 | .cb = telnet_new_connection, |
| 53 | .priv_nr = 0, |
| 54 | }; |
| 55 | |
| 56 | void telnet_init(struct gsm_network *network, int port) { |
| 57 | struct sockaddr_in sock_addr; |
| 58 | int fd; |
| 59 | |
| 60 | fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 61 | |
| 62 | if (fd < 0) { |
| 63 | perror("Telnet interface socket creation failed"); |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | memset(&sock_addr, 0, sizeof(sock_addr)); |
| 68 | sock_addr.sin_family = AF_INET; |
| 69 | sock_addr.sin_port = htons(port); |
| 70 | sock_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 71 | |
| 72 | if (bind(fd, (struct sockaddr*)&sock_addr, sizeof(sock_addr)) < 0) { |
| 73 | perror("Telnet interface failed to bind"); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | if (listen(fd, 0) < 0) { |
| 78 | perror("Telnet interface failed to listen"); |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | server_socket.data = network; |
| 83 | server_socket.fd = fd; |
| 84 | bsc_register_fd(&server_socket); |
| 85 | } |
| 86 | |
| 87 | void telnet_write_help(int fd) { |
| 88 | int ret; |
| 89 | static char *msg = |
| 90 | "Help for the ad-hoc telnet command line interface\n" |
| 91 | "The generic pattern is CMD LEN DATA\\n or just CMD\n" |
| 92 | "where CMD is one of the following:\n" |
| 93 | "help\n" |
| 94 | "page IMSI (type)\n" |
| 95 | "call IMSI (number)\n" |
| 96 | "get_channel IMSI Add use count on an active channel\n" |
| 97 | "put_channel IMSI Remove use count on an active channel\n" |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 98 | "show This will show the channel allocation\n" |
Holger Freyther | 868b8cd | 2009-01-04 03:57:27 +0000 | [diff] [blame] | 99 | "48 IMSI 0xAB 0xEF...Send GSM 04.08. proto and msg byte then data\n" |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 100 | "11 IMSI 0xAB 0xEF...Send GSM 04.11\n"; |
| 101 | |
| 102 | ret = write(fd, msg, strlen(msg)); |
| 103 | } |
| 104 | |
| 105 | static void print_welcome(int fd) { |
| 106 | int ret; |
| 107 | static char *msg = |
| 108 | "Welcome to the OpenBSC Control interface\n" |
| 109 | "Copyright (C) 2008, 2009 Harald Welte\n" |
| 110 | "Contributions by Daniel Willmann, Jan Lübbe, " |
| 111 | "Stefan Schmidt, Holger Freyther\n\n" |
| 112 | "License GPLv2+: GNU GPL version 2 or later " |
| 113 | "<http://gnu.org/licenses/gpl.html>\n" |
| 114 | "This is free software: you are free to change " |
| 115 | "and redistribute it.\n" |
| 116 | "There is NO WARRANTY, to the extent permitted " |
| 117 | "by law.\nType \"help\" to get a short introduction.\n"; |
| 118 | |
| 119 | ret = write(fd, msg, strlen(msg)); |
| 120 | } |
| 121 | |
| 122 | int telnet_close_client(struct bsc_fd *fd) { |
| 123 | struct telnet_connection *conn = (struct telnet_connection*)fd->data; |
| 124 | |
| 125 | close(fd->fd); |
| 126 | bsc_unregister_fd(fd); |
| 127 | llist_del(&conn->entry); |
| 128 | free(conn); |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | void telnet_error_client(int fd) { |
| 133 | int ret; |
| 134 | static char *msg = "Something went wrong. Please try again.\n"; |
| 135 | |
| 136 | printf("Error\n"); |
| 137 | ret = write(fd, msg, strlen(msg)); |
| 138 | } |
| 139 | |
Holger Freyther | f87573d | 2009-01-04 03:49:41 +0000 | [diff] [blame] | 140 | static struct gsm_lchan* find_channel(struct gsm_bts *bts, const char *imsi, |
| 141 | const char **error, int fd) { |
| 142 | int ret; |
| 143 | struct gsm_lchan *lchan; |
| 144 | struct gsm_subscriber *subscr; |
| 145 | |
| 146 | subscr = subscr_get_by_imsi(imsi); |
| 147 | if (!subscr) { |
| 148 | ret = write(fd, error[0], strlen(error[0])); |
| 149 | return NULL; |
| 150 | } |
| 151 | |
| 152 | lchan = lchan_find(bts, subscr); |
| 153 | if (!lchan) |
| 154 | ret = write(fd, error[1], strlen(error[1])); |
| 155 | |
| 156 | subscr_put(subscr); |
| 157 | return lchan; |
| 158 | } |
| 159 | |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 160 | void telnet_page(struct telnet_connection *connection, const char *imsi, int type) { |
| 161 | int ret; |
| 162 | static const char* error[] = { |
| 163 | "paging: IMSI not found\n", |
| 164 | "paging: No channel allocated for IMSI -> will allocate\n" }; |
| 165 | struct gsm_bts *bts = &connection->network->bts[connection->bts]; |
| 166 | struct gsm_lchan *lchan = find_channel(bts, imsi, error, connection->fd.fd); |
| 167 | |
| 168 | if (lchan) { |
| 169 | static const char *msg = "paging: A Channel is already allocated.\n"; |
| 170 | ret = write(connection->fd.fd, msg, strlen(msg)); |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | struct gsm_subscriber *subscr = subscr_get_by_imsi(imsi); |
| 175 | if (!subscr) |
| 176 | return; |
| 177 | |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 178 | page_request(bts, subscr, type); |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 179 | } |
| 180 | |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 181 | void telnet_put_channel(struct telnet_connection *connection, const char *imsi) { |
Holger Freyther | f87573d | 2009-01-04 03:49:41 +0000 | [diff] [blame] | 182 | static const char* error[] = { |
| 183 | "put_channel: IMSI not found\n", |
| 184 | "put_channel: No channel allocated for IMSI\n" }; |
| 185 | struct gsm_bts *bts = &connection->network->bts[connection->bts]; |
| 186 | struct gsm_lchan *lchan = find_channel(bts, imsi, error, connection->fd.fd); |
| 187 | |
| 188 | if (!lchan) |
| 189 | return; |
| 190 | |
| 191 | put_lchan(lchan); |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | void telnet_get_channel(struct telnet_connection *connection, const char *imsi) { |
Holger Freyther | f87573d | 2009-01-04 03:49:41 +0000 | [diff] [blame] | 195 | static const char* error[] = { |
| 196 | "get_channel: IMSI not found\n", |
| 197 | "get_channel: No channel allocated for IMSI\n" }; |
| 198 | struct gsm_bts *bts = &connection->network->bts[connection->bts]; |
| 199 | struct gsm_lchan *lchan = find_channel(bts, imsi, error, connection->fd.fd); |
| 200 | |
| 201 | if (!lchan) |
| 202 | return; |
| 203 | |
| 204 | use_lchan(lchan); |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | void telnet_call(struct telnet_connection *connection, const char* imsi, |
| 208 | const char *origin) { |
Holger Freyther | 3ae8fd2 | 2009-01-04 03:50:40 +0000 | [diff] [blame] | 209 | static const char* error[] = { |
| 210 | "call: IMSI not found\n", |
| 211 | "call: No channel allocated for IMSI\n" }; |
| 212 | struct gsm_bts *bts = &connection->network->bts[connection->bts]; |
| 213 | struct gsm_lchan *lchan = find_channel(bts, imsi, error, connection->fd.fd); |
| 214 | |
| 215 | if (!lchan) |
| 216 | return; |
| 217 | |
| 218 | /* TODO: add the origin */ |
| 219 | gsm48_cc_tx_setup(lchan); |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | void telnet_send_gsm_48(struct telnet_connection *connection) { |
Holger Freyther | 868b8cd | 2009-01-04 03:57:27 +0000 | [diff] [blame] | 223 | static const char* error[] = { |
| 224 | "48: IMSI not found\n", |
| 225 | "48: No channel allocated for IMSI\n" }; |
Holger Freyther | 5e76ce6 | 2009-01-04 20:15:12 +0000 | [diff] [blame] | 226 | int ret; |
Holger Freyther | 868b8cd | 2009-01-04 03:57:27 +0000 | [diff] [blame] | 227 | struct gsm_bts *bts = &connection->network->bts[connection->bts]; |
| 228 | struct gsm_lchan *lchan = find_channel(bts, connection->imsi, error, connection->fd.fd); |
| 229 | |
| 230 | if (!lchan) |
| 231 | return; |
| 232 | |
Holger Freyther | 5e76ce6 | 2009-01-04 20:15:12 +0000 | [diff] [blame] | 233 | if (connection->read < 2) { |
| 234 | static const char *msg = "48: Need at least two bytes"; |
| 235 | ret = write(connection->fd.fd, msg, strlen(msg)); |
| 236 | return; |
| 237 | } |
| 238 | |
Holger Freyther | 868b8cd | 2009-01-04 03:57:27 +0000 | [diff] [blame] | 239 | struct msgb *msg = gsm48_msgb_alloc(); |
| 240 | struct gsm48_hdr *gh; |
| 241 | int i; |
| 242 | |
| 243 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + connection->read-2); |
| 244 | msg->lchan = lchan; |
| 245 | |
| 246 | gh->proto_discr = connection->commands[0]; |
| 247 | gh->msg_type = connection->commands[1]; |
| 248 | for (i = 2; i < connection->read; ++i) |
| 249 | gh->data[i-2] = connection->commands[i]; |
| 250 | |
Holger Freyther | 4c8f114 | 2009-01-04 20:17:07 +0000 | [diff] [blame] | 251 | gsm48_sendmsg(msg); |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | void telnet_send_gsm_11(struct telnet_connection *connection) { |
| 255 | printf("sending gsm04.11 message\n"); |
| 256 | } |
| 257 | |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 258 | static void show_bts(int fd, struct gsm_bts *bts) { |
| 259 | WRITE_CONNECTION(fd, |
| 260 | "BTS #%u on link %u LOC: %u TRX: %d CCCH0: arfcn:%u,#%u\n", |
| 261 | bts->nr, bts->bts_nr, bts->location_area_code, |
| 262 | bts->num_trx, bts->c0->arfcn, bts->c0->nr) |
| 263 | } |
| 264 | |
| 265 | static void show_trx(int fd, struct gsm_bts_trx *trx) { |
| 266 | WRITE_CONNECTION(fd, |
| 267 | " TRX: %u ARFCN: %u\n", |
| 268 | trx->nr, trx->arfcn) |
| 269 | } |
| 270 | |
| 271 | static void show_ts(int fd, struct gsm_bts_trx_ts *ts) { |
| 272 | WRITE_CONNECTION(fd, |
Harald Welte | d4fc1b2 | 2009-01-04 16:11:31 +0000 | [diff] [blame] | 273 | " TS: #%u pchan: %12s flags: %u\n", |
| 274 | ts->nr, gsm_pchan_name(ts->pchan), ts->flags); |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static void show_lchan(int fd, struct gsm_lchan *lchan) { |
| 278 | struct gsm_subscriber *subscr = lchan->subscr; |
| 279 | WRITE_CONNECTION(fd, |
Harald Welte | 626fe9c | 2009-01-09 21:24:53 +0000 | [diff] [blame] | 280 | " LCHAN: #%u type: %7s count: %d subscriber: %s/%s/%s use: %d loc: %p\n", |
Harald Welte | d4fc1b2 | 2009-01-04 16:11:31 +0000 | [diff] [blame] | 281 | lchan->nr, gsm_lchan_name(lchan->type), |
Harald Welte | 626fe9c | 2009-01-09 21:24:53 +0000 | [diff] [blame] | 282 | lchan->use_count, |
Holger Freyther | ae61cae | 2009-01-04 03:46:01 +0000 | [diff] [blame] | 283 | subscr ? subscr->imsi : "na", |
| 284 | subscr ? subscr->tmsi : "na", |
| 285 | subscr ? subscr->name : "na", |
| 286 | lchan->use_count, lchan->loc_operation); |
| 287 | } |
| 288 | |
| 289 | void telnet_list_channels(struct telnet_connection *connection) { |
| 290 | int bts_no, trx, lchan_no, ts_no; |
| 291 | struct gsm_network *network = connection->network; |
| 292 | |
| 293 | for (bts_no = 0; bts_no < network->num_bts; ++bts_no) { |
| 294 | struct gsm_bts *bts = &network->bts[bts_no]; |
| 295 | show_bts(connection->fd.fd, bts); |
| 296 | |
| 297 | for (trx = 0; trx < bts->num_trx; ++trx) { |
| 298 | show_trx(connection->fd.fd, &bts->trx[trx]); |
| 299 | for (ts_no = 0; ts_no < 8; ++ts_no) { |
| 300 | show_ts(connection->fd.fd, &bts->trx[trx].ts[ts_no]); |
| 301 | for (lchan_no = 0; lchan_no < TS_MAX_LCHAN; ++lchan_no) { |
| 302 | struct gsm_lchan *lchan = |
| 303 | &bts->trx[trx].ts[ts_no].lchan[lchan_no]; |
| 304 | show_lchan(connection->fd.fd, lchan); |
| 305 | } |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 311 | static int client_data(struct bsc_fd *fd, unsigned int what) { |
| 312 | char buf[4096]; |
| 313 | int ret; |
| 314 | |
| 315 | ret = read(fd->fd, buf, sizeof(buf)-1); |
| 316 | buf[ret] = '\0'; |
| 317 | |
| 318 | /* connection is gone */ |
| 319 | if (ret <= 0) |
| 320 | return telnet_close_client(fd); |
| 321 | |
| 322 | /* time to parse. This code assumes that the input is line based */ |
| 323 | telnet_parse((struct telnet_connection*)fd->data, buf); |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | static int telnet_new_connection(struct bsc_fd *fd, unsigned int what) { |
| 329 | struct telnet_connection *connection; |
| 330 | struct sockaddr_in sockaddr; |
| 331 | socklen_t len = sizeof(sockaddr); |
| 332 | int new_connection = accept(fd->fd, (struct sockaddr*)&sockaddr, &len); |
| 333 | |
| 334 | if (new_connection < 0) { |
| 335 | perror("telnet accept failed"); |
| 336 | return -1; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | connection = (struct telnet_connection*)malloc(sizeof(*connection)); |
| 341 | memset(connection, 0, sizeof(*connection)); |
| 342 | connection->network = (struct gsm_network*)fd->data; |
| 343 | connection->fd.data = connection; |
| 344 | connection->fd.fd = new_connection; |
| 345 | connection->fd.when = BSC_FD_READ; |
| 346 | connection->fd.cb = client_data; |
Holger Freyther | f87573d | 2009-01-04 03:49:41 +0000 | [diff] [blame] | 347 | connection->bts = 0; |
Holger Freyther | 219518d | 2009-01-02 22:04:43 +0000 | [diff] [blame] | 348 | bsc_register_fd(&connection->fd); |
| 349 | llist_add_tail(&connection->entry, &active_connections); |
| 350 | |
| 351 | print_welcome(new_connection); |
| 352 | |
| 353 | return 0; |
| 354 | } |