Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 1 | /* OpenBSC Abis interface to E1 */ |
| 2 | |
| 3 | /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
| 4 | * |
| 5 | * All Rights Reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU Affero General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include "internal.h" |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <unistd.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <errno.h> |
| 28 | #include <string.h> |
| 29 | #include <time.h> |
| 30 | #include <sys/fcntl.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <sys/ioctl.h> |
| 33 | #include <arpa/inet.h> |
| 34 | #include <mISDNif.h> |
| 35 | |
| 36 | //#define AF_COMPATIBILITY_FUNC |
| 37 | //#include <compat_af_isdn.h> |
| 38 | #ifndef AF_ISDN |
| 39 | #define AF_ISDN 34 |
| 40 | #define PF_ISDN AF_ISDN |
| 41 | #endif |
| 42 | |
| 43 | #include <osmocom/core/select.h> |
| 44 | #include <osmocom/core/msgb.h> |
| 45 | #include <osmocom/core/logging.h> |
| 46 | #include <osmocom/core/signal.h> |
Pablo Neira Ayuso | 177094b | 2011-06-07 12:21:51 +0200 | [diff] [blame] | 47 | #include <osmocom/abis/e1_input.h> |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 48 | #include <osmocom/core/linuxlist.h> |
Pablo Neira Ayuso | 177094b | 2011-06-07 12:21:51 +0200 | [diff] [blame] | 49 | #include <osmocom/abis/subchan_demux.h> |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 50 | #include <talloc.h> |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 51 | |
| 52 | #define NUM_E1_TS 32 |
| 53 | |
| 54 | static void *tall_e1inp_ctx; |
| 55 | |
| 56 | /* list of all E1 drivers */ |
| 57 | LLIST_HEAD(e1inp_driver_list); |
| 58 | |
| 59 | /* list of all E1 lines */ |
| 60 | LLIST_HEAD(e1inp_line_list); |
| 61 | |
| 62 | static void *tall_sigl_ctx; |
| 63 | |
| 64 | /* |
| 65 | * pcap writing of the misdn load |
| 66 | * pcap format is from http://wiki.wireshark.org/Development/LibpcapFileFormat |
| 67 | */ |
| 68 | #define DLT_LINUX_LAPD 177 |
| 69 | #define PCAP_INPUT 0 |
| 70 | #define PCAP_OUTPUT 1 |
| 71 | |
| 72 | struct pcap_hdr { |
| 73 | uint32_t magic_number; |
| 74 | uint16_t version_major; |
| 75 | uint16_t version_minor; |
| 76 | int32_t thiszone; |
| 77 | uint32_t sigfigs; |
| 78 | uint32_t snaplen; |
| 79 | uint32_t network; |
| 80 | } __attribute__((packed)); |
| 81 | |
| 82 | struct pcaprec_hdr { |
| 83 | uint32_t ts_sec; |
| 84 | uint32_t ts_usec; |
| 85 | uint32_t incl_len; |
| 86 | uint32_t orig_len; |
| 87 | } __attribute__((packed)); |
| 88 | |
| 89 | struct fake_linux_lapd_header { |
| 90 | uint16_t pkttype; |
| 91 | uint16_t hatype; |
| 92 | uint16_t halen; |
| 93 | uint64_t addr; |
| 94 | int16_t protocol; |
| 95 | } __attribute__((packed)); |
| 96 | |
| 97 | struct lapd_header { |
| 98 | uint8_t ea1 : 1; |
| 99 | uint8_t cr : 1; |
| 100 | uint8_t sapi : 6; |
| 101 | uint8_t ea2 : 1; |
| 102 | uint8_t tei : 7; |
| 103 | uint8_t control_foo; /* fake UM's ... */ |
| 104 | } __attribute__((packed)); |
| 105 | |
| 106 | osmo_static_assert(offsetof(struct fake_linux_lapd_header, hatype) == 2, hatype_offset); |
| 107 | osmo_static_assert(offsetof(struct fake_linux_lapd_header, halen) == 4, halen_offset); |
| 108 | osmo_static_assert(offsetof(struct fake_linux_lapd_header, addr) == 6, addr_offset); |
| 109 | osmo_static_assert(offsetof(struct fake_linux_lapd_header, protocol) == 14, proto_offset); |
| 110 | osmo_static_assert(sizeof(struct fake_linux_lapd_header) == 16, lapd_header_size); |
| 111 | |
| 112 | |
| 113 | static int pcap_fd = -1; |
| 114 | |
| 115 | void e1_set_pcap_fd(int fd) |
| 116 | { |
| 117 | int ret; |
| 118 | struct pcap_hdr header = { |
| 119 | .magic_number = 0xa1b2c3d4, |
| 120 | .version_major = 2, |
| 121 | .version_minor = 4, |
| 122 | .thiszone = 0, |
| 123 | .sigfigs = 0, |
| 124 | .snaplen = 65535, |
| 125 | .network = DLT_LINUX_LAPD, |
| 126 | }; |
| 127 | |
| 128 | pcap_fd = fd; |
| 129 | ret = write(pcap_fd, &header, sizeof(header)); |
| 130 | } |
| 131 | |
| 132 | /* This currently only works for the D-Channel */ |
| 133 | static void write_pcap_packet(int direction, int sapi, int tei, |
| 134 | struct msgb *msg) { |
| 135 | if (pcap_fd < 0) |
| 136 | return; |
| 137 | |
| 138 | int ret; |
| 139 | time_t cur_time; |
| 140 | struct tm *tm; |
| 141 | |
| 142 | struct fake_linux_lapd_header header = { |
| 143 | .pkttype = 4, |
| 144 | .hatype = 0, |
| 145 | .halen = 0, |
| 146 | .addr = direction == PCAP_OUTPUT ? 0x0 : 0x1, |
| 147 | .protocol = ntohs(48), |
| 148 | }; |
| 149 | |
| 150 | struct lapd_header lapd_header = { |
| 151 | .ea1 = 0, |
| 152 | .cr = direction == PCAP_OUTPUT ? 1 : 0, |
| 153 | .sapi = sapi & 0x3F, |
| 154 | .ea2 = 1, |
| 155 | .tei = tei & 0x7F, |
| 156 | .control_foo = 0x03 /* UI */, |
| 157 | }; |
| 158 | |
| 159 | struct pcaprec_hdr payload_header = { |
| 160 | .ts_sec = 0, |
| 161 | .ts_usec = 0, |
| 162 | .incl_len = msgb_l2len(msg) + sizeof(struct fake_linux_lapd_header) |
| 163 | + sizeof(struct lapd_header), |
| 164 | .orig_len = msgb_l2len(msg) + sizeof(struct fake_linux_lapd_header) |
| 165 | + sizeof(struct lapd_header), |
| 166 | }; |
| 167 | |
| 168 | |
| 169 | cur_time = time(NULL); |
| 170 | tm = localtime(&cur_time); |
| 171 | payload_header.ts_sec = mktime(tm); |
| 172 | |
| 173 | ret = write(pcap_fd, &payload_header, sizeof(payload_header)); |
| 174 | ret = write(pcap_fd, &header, sizeof(header)); |
| 175 | ret = write(pcap_fd, &lapd_header, sizeof(lapd_header)); |
| 176 | ret = write(pcap_fd, msg->l2h, msgb_l2len(msg)); |
| 177 | } |
| 178 | |
| 179 | static const char *sign_types[] = { |
| 180 | [E1INP_SIGN_NONE] = "None", |
| 181 | [E1INP_SIGN_OML] = "OML", |
| 182 | [E1INP_SIGN_RSL] = "RSL", |
| 183 | }; |
| 184 | const char *e1inp_signtype_name(enum e1inp_sign_type tp) |
| 185 | { |
| 186 | if (tp >= ARRAY_SIZE(sign_types)) |
| 187 | return "undefined"; |
| 188 | return sign_types[tp]; |
| 189 | } |
| 190 | |
| 191 | static const char *ts_types[] = { |
| 192 | [E1INP_TS_TYPE_NONE] = "None", |
| 193 | [E1INP_TS_TYPE_SIGN] = "Signalling", |
| 194 | [E1INP_TS_TYPE_TRAU] = "TRAU", |
| 195 | }; |
| 196 | |
| 197 | const char *e1inp_tstype_name(enum e1inp_ts_type tp) |
| 198 | { |
| 199 | if (tp >= ARRAY_SIZE(ts_types)) |
| 200 | return "undefined"; |
| 201 | return ts_types[tp]; |
| 202 | } |
| 203 | |
Pablo Neira Ayuso | 96e7263 | 2011-06-26 19:08:05 +0200 | [diff] [blame] | 204 | int abis_sendmsg(struct msgb *msg) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 205 | { |
| 206 | struct e1inp_sign_link *sign_link = msg->dst; |
| 207 | struct e1inp_driver *e1inp_driver; |
| 208 | struct e1inp_ts *e1i_ts; |
| 209 | ; |
| 210 | msg->l2h = msg->data; |
| 211 | |
| 212 | /* don't know how to route this message. */ |
| 213 | if (sign_link == NULL) { |
Pablo Neira Ayuso | 96e7263 | 2011-06-26 19:08:05 +0200 | [diff] [blame] | 214 | LOGP(DRSL, LOGL_ERROR, "abis_sendmsg: msg->dst == NULL: %s\n", |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 215 | osmo_hexdump(msg->data, msg->len)); |
| 216 | talloc_free(msg); |
| 217 | return -EINVAL; |
| 218 | } |
| 219 | e1i_ts = sign_link->ts; |
| 220 | if (!osmo_timer_pending(&e1i_ts->sign.tx_timer)) { |
| 221 | /* notify the driver we have something to write */ |
| 222 | e1inp_driver = sign_link->ts->line->driver; |
| 223 | e1inp_driver->want_write(e1i_ts); |
| 224 | } |
| 225 | msgb_enqueue(&sign_link->tx_list, msg); |
| 226 | |
| 227 | /* dump it */ |
| 228 | write_pcap_packet(PCAP_OUTPUT, sign_link->sapi, sign_link->tei, msg); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
Pablo Neira Ayuso | 96e7263 | 2011-06-26 19:08:05 +0200 | [diff] [blame] | 233 | int abis_rsl_sendmsg(struct msgb *msg) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 234 | { |
Pablo Neira Ayuso | 96e7263 | 2011-06-26 19:08:05 +0200 | [diff] [blame] | 235 | return abis_sendmsg(msg); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | /* Timeslot */ |
| 239 | int e1inp_ts_config_trau(struct e1inp_ts *ts, struct e1inp_line *line, |
Pablo Neira Ayuso | 211d2ca | 2011-06-07 17:15:10 +0200 | [diff] [blame] | 240 | int (*trau_rcv_cb)(struct subch_demux *dmx, int ch, |
| 241 | uint8_t *data, int len, void *_priv)) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 242 | { |
| 243 | if (ts->type == E1INP_TS_TYPE_TRAU && ts->line && line) |
| 244 | return 0; |
| 245 | |
| 246 | ts->type = E1INP_TS_TYPE_TRAU; |
| 247 | ts->line = line; |
| 248 | |
| 249 | subchan_mux_init(&ts->trau.mux); |
Pablo Neira Ayuso | 211d2ca | 2011-06-07 17:15:10 +0200 | [diff] [blame] | 250 | ts->trau.demux.out_cb = trau_rcv_cb; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 251 | ts->trau.demux.data = ts; |
| 252 | subch_demux_init(&ts->trau.demux); |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | int e1inp_ts_config_sign(struct e1inp_ts *ts, struct e1inp_line *line) |
| 257 | { |
| 258 | if (ts->type == E1INP_TS_TYPE_SIGN && ts->line && line) |
| 259 | return 0; |
| 260 | |
| 261 | ts->type = E1INP_TS_TYPE_SIGN; |
| 262 | ts->line = line; |
| 263 | |
| 264 | if (line && line->driver) |
| 265 | ts->sign.delay = line->driver->default_delay; |
| 266 | else |
| 267 | ts->sign.delay = 100000; |
| 268 | INIT_LLIST_HEAD(&ts->sign.sign_links); |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | struct e1inp_line *e1inp_line_get(uint8_t e1_nr) |
| 273 | { |
| 274 | struct e1inp_line *e1i_line; |
| 275 | |
| 276 | /* iterate over global list of e1 lines */ |
| 277 | llist_for_each_entry(e1i_line, &e1inp_line_list, list) { |
| 278 | if (e1i_line->num == e1_nr) |
| 279 | return e1i_line; |
| 280 | } |
| 281 | return NULL; |
| 282 | } |
| 283 | |
| 284 | struct e1inp_line * |
Pablo Neira Ayuso | f163d23 | 2011-06-25 18:42:55 +0200 | [diff] [blame] | 285 | e1inp_line_create(uint8_t e1_nr, const char *driver_name) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 286 | { |
| 287 | struct e1inp_driver *driver; |
| 288 | struct e1inp_line *line; |
| 289 | int i; |
| 290 | |
| 291 | line = e1inp_line_get(e1_nr); |
| 292 | if (line) { |
| 293 | LOGP(DINP, LOGL_ERROR, "E1 Line %u already exists\n", |
| 294 | e1_nr); |
| 295 | return NULL; |
| 296 | } |
| 297 | |
| 298 | driver = e1inp_driver_find(driver_name); |
| 299 | if (!driver) { |
| 300 | LOGP(DINP, LOGL_ERROR, "No such E1 driver '%s'\n", |
| 301 | driver_name); |
| 302 | return NULL; |
| 303 | } |
| 304 | |
| 305 | line = talloc_zero(tall_e1inp_ctx, struct e1inp_line); |
| 306 | if (!line) |
| 307 | return NULL; |
| 308 | |
| 309 | line->driver = driver; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 310 | |
| 311 | line->num = e1_nr; |
| 312 | for (i = 0; i < NUM_E1_TS; i++) { |
| 313 | line->ts[i].num = i+1; |
| 314 | line->ts[i].line = line; |
| 315 | } |
| 316 | llist_add_tail(&line->list, &e1inp_line_list); |
| 317 | |
| 318 | return line; |
| 319 | } |
| 320 | |
Pablo Neira Ayuso | f163d23 | 2011-06-25 18:42:55 +0200 | [diff] [blame] | 321 | void |
| 322 | e1inp_line_bind_ops(struct e1inp_line *line, const struct e1inp_line_ops *ops) |
| 323 | { |
| 324 | line->ops = ops; |
| 325 | } |
| 326 | |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 327 | #if 0 |
| 328 | struct e1inp_line *e1inp_line_get_create(uint8_t e1_nr) |
| 329 | { |
| 330 | struct e1inp_line *line; |
| 331 | int i; |
| 332 | |
| 333 | line = e1inp_line_get(e1_nr); |
| 334 | if (line) |
| 335 | return line; |
| 336 | |
| 337 | line = talloc_zero(tall_e1inp_ctx, struct e1inp_line); |
| 338 | if (!line) |
| 339 | return NULL; |
| 340 | |
| 341 | line->num = e1_nr; |
| 342 | for (i = 0; i < NUM_E1_TS; i++) { |
| 343 | line->ts[i].num = i+1; |
| 344 | line->ts[i].line = line; |
| 345 | } |
| 346 | llist_add_tail(&line->list, &e1inp_line_list); |
| 347 | |
| 348 | return line; |
| 349 | } |
| 350 | #endif |
| 351 | |
| 352 | static struct e1inp_ts *e1inp_ts_get(uint8_t e1_nr, uint8_t ts_nr) |
| 353 | { |
| 354 | struct e1inp_line *e1i_line; |
| 355 | |
| 356 | e1i_line = e1inp_line_get(e1_nr); |
| 357 | if (!e1i_line) |
| 358 | return NULL; |
| 359 | |
| 360 | return &e1i_line->ts[ts_nr-1]; |
| 361 | } |
| 362 | |
| 363 | struct subch_mux *e1inp_get_mux(uint8_t e1_nr, uint8_t ts_nr) |
| 364 | { |
| 365 | struct e1inp_ts *e1i_ts = e1inp_ts_get(e1_nr, ts_nr); |
| 366 | |
| 367 | if (!e1i_ts) |
| 368 | return NULL; |
| 369 | |
| 370 | return &e1i_ts->trau.mux; |
| 371 | } |
| 372 | |
| 373 | /* Signalling Link */ |
| 374 | |
| 375 | struct e1inp_sign_link *e1inp_lookup_sign_link(struct e1inp_ts *e1i, |
| 376 | uint8_t tei, uint8_t sapi) |
| 377 | { |
| 378 | struct e1inp_sign_link *link; |
| 379 | |
| 380 | llist_for_each_entry(link, &e1i->sign.sign_links, list) { |
| 381 | if (link->sapi == sapi && link->tei == tei) |
| 382 | return link; |
| 383 | } |
| 384 | |
| 385 | return NULL; |
| 386 | } |
| 387 | |
| 388 | /* create a new signalling link in a E1 timeslot */ |
| 389 | |
| 390 | struct e1inp_sign_link * |
| 391 | e1inp_sign_link_create(struct e1inp_ts *ts, enum e1inp_sign_type type, |
| 392 | struct gsm_bts_trx *trx, uint8_t tei, |
| 393 | uint8_t sapi) |
| 394 | { |
| 395 | struct e1inp_sign_link *link; |
| 396 | |
| 397 | if (ts->type != E1INP_TS_TYPE_SIGN) |
| 398 | return NULL; |
| 399 | |
| 400 | link = talloc_zero(tall_sigl_ctx, struct e1inp_sign_link); |
| 401 | if (!link) |
| 402 | return NULL; |
| 403 | |
| 404 | link->ts = ts; |
| 405 | link->type = type; |
| 406 | INIT_LLIST_HEAD(&link->tx_list); |
| 407 | link->trx = trx; |
| 408 | link->tei = tei; |
| 409 | link->sapi = sapi; |
| 410 | |
| 411 | llist_add_tail(&link->list, &ts->sign.sign_links); |
| 412 | |
| 413 | return link; |
| 414 | } |
| 415 | |
| 416 | void e1inp_sign_link_destroy(struct e1inp_sign_link *link) |
| 417 | { |
| 418 | struct msgb *msg; |
| 419 | |
| 420 | llist_del(&link->list); |
| 421 | while (!llist_empty(&link->tx_list)) { |
| 422 | msg = msgb_dequeue(&link->tx_list); |
| 423 | msgb_free(msg); |
| 424 | } |
| 425 | |
| 426 | if (link->ts->type == E1INP_TS_TYPE_SIGN) |
| 427 | osmo_timer_del(&link->ts->sign.tx_timer); |
| 428 | |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 429 | if (link->ts->line->driver->close) |
Pablo Neira Ayuso | add3ec8 | 2011-07-05 14:45:46 +0200 | [diff] [blame] | 430 | link->ts->line->driver->close(link); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 431 | |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 432 | talloc_free(link); |
| 433 | } |
| 434 | |
| 435 | /* XXX */ |
| 436 | /* the E1 driver tells us he has received something on a TS */ |
| 437 | int e1inp_rx_ts(struct e1inp_ts *ts, struct msgb *msg, |
| 438 | uint8_t tei, uint8_t sapi) |
| 439 | { |
| 440 | struct e1inp_sign_link *link; |
| 441 | int ret = 0; |
| 442 | |
| 443 | switch (ts->type) { |
| 444 | case E1INP_TS_TYPE_SIGN: |
| 445 | /* consult the list of signalling links */ |
| 446 | write_pcap_packet(PCAP_INPUT, sapi, tei, msg); |
| 447 | link = e1inp_lookup_sign_link(ts, tei, sapi); |
| 448 | if (!link) { |
| 449 | LOGP(DMI, LOGL_ERROR, "didn't find signalling link for " |
| 450 | "tei %d, sapi %d\n", tei, sapi); |
| 451 | return -EINVAL; |
| 452 | } |
Pablo Neira Ayuso | f163d23 | 2011-06-25 18:42:55 +0200 | [diff] [blame] | 453 | if (!ts->line->ops->sign_link) { |
Pablo Neira Ayuso | 5a4b7c5 | 2011-06-07 14:07:48 +0200 | [diff] [blame] | 454 | LOGP(DINP, LOGL_ERROR, "Fix your application, " |
| 455 | "no action set for signalling messages.\n"); |
| 456 | return -ENOENT; |
| 457 | } |
Pablo Neira Ayuso | dbd82fb | 2011-07-05 15:29:23 +0200 | [diff] [blame] | 458 | msg->dst = link; |
| 459 | ts->line->ops->sign_link(msg); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 460 | break; |
| 461 | case E1INP_TS_TYPE_TRAU: |
Pablo Neira Ayuso | 211d2ca | 2011-06-07 17:15:10 +0200 | [diff] [blame] | 462 | ret = subch_demux_in(&ts->trau.demux, msg->l2h, msgb_l2len(msg)); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 463 | break; |
| 464 | default: |
| 465 | ret = -EINVAL; |
| 466 | LOGP(DMI, LOGL_ERROR, "unknown TS type %u\n", ts->type); |
| 467 | break; |
| 468 | } |
| 469 | |
| 470 | return ret; |
| 471 | } |
| 472 | |
| 473 | #define TSX_ALLOC_SIZE 4096 |
| 474 | |
| 475 | /* called by driver if it wants to transmit on a given TS */ |
| 476 | struct msgb *e1inp_tx_ts(struct e1inp_ts *e1i_ts, |
| 477 | struct e1inp_sign_link **sign_link) |
| 478 | { |
| 479 | struct e1inp_sign_link *link; |
| 480 | struct msgb *msg = NULL; |
| 481 | int len; |
| 482 | |
| 483 | switch (e1i_ts->type) { |
| 484 | case E1INP_TS_TYPE_SIGN: |
| 485 | /* FIXME: implement this round robin */ |
| 486 | llist_for_each_entry(link, &e1i_ts->sign.sign_links, list) { |
| 487 | msg = msgb_dequeue(&link->tx_list); |
| 488 | if (msg) { |
| 489 | if (sign_link) |
| 490 | *sign_link = link; |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | break; |
| 495 | case E1INP_TS_TYPE_TRAU: |
| 496 | msg = msgb_alloc(TSX_ALLOC_SIZE, "TRAU_TX"); |
| 497 | if (!msg) |
| 498 | return NULL; |
| 499 | len = subchan_mux_out(&e1i_ts->trau.mux, msg->data, 40); |
| 500 | msgb_put(msg, 40); |
| 501 | break; |
| 502 | default: |
| 503 | LOGP(DMI, LOGL_ERROR, "unsupported E1 TS type %u\n", e1i_ts->type); |
| 504 | return NULL; |
| 505 | } |
| 506 | return msg; |
| 507 | } |
| 508 | |
| 509 | /* called by driver in case some kind of link state event */ |
| 510 | int e1inp_event(struct e1inp_ts *ts, int evt, uint8_t tei, uint8_t sapi) |
| 511 | { |
| 512 | struct e1inp_sign_link *link; |
| 513 | struct input_signal_data isd; |
| 514 | |
| 515 | link = e1inp_lookup_sign_link(ts, tei, sapi); |
| 516 | if (!link) |
| 517 | return -EINVAL; |
| 518 | |
| 519 | isd.link_type = link->type; |
| 520 | isd.trx = link->trx; |
| 521 | isd.tei = tei; |
| 522 | isd.sapi = sapi; |
| 523 | |
| 524 | /* report further upwards */ |
| 525 | osmo_signal_dispatch(SS_INPUT, evt, &isd); |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | /* register a driver with the E1 core */ |
| 530 | int e1inp_driver_register(struct e1inp_driver *drv) |
| 531 | { |
| 532 | llist_add_tail(&drv->list, &e1inp_driver_list); |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | struct e1inp_driver *e1inp_driver_find(const char *name) |
| 537 | { |
| 538 | struct e1inp_driver *drv; |
| 539 | |
| 540 | llist_for_each_entry(drv, &e1inp_driver_list, list) { |
| 541 | if (!strcasecmp(name, drv->name)) |
| 542 | return drv; |
| 543 | } |
| 544 | return NULL; |
| 545 | } |
| 546 | |
Pablo Neira Ayuso | f163d23 | 2011-06-25 18:42:55 +0200 | [diff] [blame] | 547 | int e1inp_line_update(struct e1inp_line *line) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 548 | { |
| 549 | struct input_signal_data isd; |
| 550 | int rc; |
| 551 | |
| 552 | /* This line has been already initialized, skip this. */ |
| 553 | if (++line->refcnt > 1) |
| 554 | return 0; |
| 555 | |
Pablo Neira Ayuso | f163d23 | 2011-06-25 18:42:55 +0200 | [diff] [blame] | 556 | if (line->driver && line->ops && line->driver->line_update) { |
| 557 | rc = line->driver->line_update(line, line->ops->role, |
| 558 | line->ops->addr); |
| 559 | } else |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 560 | rc = 0; |
| 561 | |
| 562 | /* Send a signal to anyone who is interested in new lines being |
| 563 | * configured */ |
| 564 | memset(&isd, 0, sizeof(isd)); |
| 565 | isd.line = line; |
| 566 | osmo_signal_dispatch(SS_INPUT, S_INP_LINE_INIT, &isd); |
| 567 | |
| 568 | return rc; |
| 569 | } |
| 570 | |
Pablo Neira Ayuso | a20762a | 2011-07-02 19:01:58 +0200 | [diff] [blame] | 571 | static int e1i_sig_cb(unsigned int subsys, unsigned int signal, |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 572 | void *handler_data, void *signal_data) |
| 573 | { |
| 574 | if (subsys != SS_GLOBAL || |
| 575 | signal != S_GLOBAL_SHUTDOWN) |
| 576 | return 0; |
| 577 | |
| 578 | if (pcap_fd) { |
| 579 | close(pcap_fd); |
| 580 | pcap_fd = -1; |
| 581 | } |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | void e1inp_misdn_init(void); |
| 587 | void e1inp_dahdi_init(void); |
| 588 | void e1inp_ipaccess_init(void); |
| 589 | void e1inp_hsl_init(void); |
| 590 | |
| 591 | void e1inp_init(void) |
| 592 | { |
Pablo Neira Ayuso | 54b4979 | 2011-06-07 12:15:26 +0200 | [diff] [blame] | 593 | tall_e1inp_ctx = talloc_named_const(libosmo_abis_ctx, 1, "e1inp"); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 594 | tall_sigl_ctx = talloc_named_const(tall_e1inp_ctx, 1, |
| 595 | "e1inp_sign_link"); |
| 596 | osmo_signal_register_handler(SS_GLOBAL, e1i_sig_cb, NULL); |
| 597 | |
| 598 | e1inp_misdn_init(); |
| 599 | #ifdef HAVE_DAHDI_USER_H |
| 600 | e1inp_dahdi_init(); |
| 601 | #endif |
| 602 | e1inp_ipaccess_init(); |
| 603 | e1inp_hsl_init(); |
| 604 | } |