Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1 | /* OpenBSC Abis/IP proxy ip.access nanoBTS */ |
| 2 | |
| 3 | /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 4 | * (C) 2010 by On Waves |
| 5 | * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 6 | * |
| 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 <stdio.h> |
| 26 | #include <unistd.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <errno.h> |
| 29 | #include <string.h> |
| 30 | #include <signal.h> |
| 31 | #include <time.h> |
| 32 | #include <sys/fcntl.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/socket.h> |
| 35 | #include <sys/ioctl.h> |
| 36 | #include <arpa/inet.h> |
| 37 | #include <netinet/in.h> |
| 38 | |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 39 | #define _GNU_SOURCE |
| 40 | #include <getopt.h> |
| 41 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 42 | #include <openbsc/gsm_data.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 43 | #include <osmocore/select.h> |
| 44 | #include <osmocore/tlv.h> |
| 45 | #include <osmocore/msgb.h> |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 46 | #include <openbsc/debug.h> |
| 47 | #include <openbsc/ipaccess.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 48 | #include <osmocore/talloc.h> |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 49 | |
Harald Welte | dc5062b | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 50 | static struct log_target *stderr_target; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 51 | |
| 52 | /* one instance of an ip.access protocol proxy */ |
| 53 | struct ipa_proxy { |
| 54 | /* socket where we listen for incoming OML from BTS */ |
| 55 | struct bsc_fd oml_listen_fd; |
| 56 | /* socket where we listen for incoming RSL from BTS */ |
| 57 | struct bsc_fd rsl_listen_fd; |
| 58 | /* list of BTS's (struct ipa_bts_conn */ |
| 59 | struct llist_head bts_list; |
| 60 | /* the BSC reconnect timer */ |
| 61 | struct timer_list reconn_timer; |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 62 | /* global GPRS NS data */ |
| 63 | struct in_addr gprs_addr; |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 64 | struct in_addr listen_addr; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /* global pointer to the proxy structure */ |
| 68 | static struct ipa_proxy *ipp; |
| 69 | |
| 70 | struct ipa_proxy_conn { |
| 71 | struct bsc_fd fd; |
| 72 | struct llist_head tx_queue; |
| 73 | struct ipa_bts_conn *bts_conn; |
| 74 | }; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 75 | #define MAX_TRX 4 |
| 76 | |
| 77 | /* represents a particular BTS in our proxy */ |
| 78 | struct ipa_bts_conn { |
| 79 | /* list of BTS's (ipa_proxy->bts_list) */ |
| 80 | struct llist_head list; |
| 81 | /* back pointer to the proxy which we belong to */ |
| 82 | struct ipa_proxy *ipp; |
| 83 | /* the unit ID as determined by CCM */ |
| 84 | struct { |
| 85 | u_int16_t site_id; |
| 86 | u_int16_t bts_id; |
| 87 | } unit_id; |
| 88 | |
| 89 | /* incoming connections from BTS */ |
| 90 | struct ipa_proxy_conn *oml_conn; |
| 91 | struct ipa_proxy_conn *rsl_conn[MAX_TRX]; |
| 92 | |
| 93 | /* outgoing connections to BSC */ |
| 94 | struct ipa_proxy_conn *bsc_oml_conn; |
| 95 | struct ipa_proxy_conn *bsc_rsl_conn[MAX_TRX]; |
| 96 | |
| 97 | /* UDP sockets for BTS and BSC injection */ |
| 98 | struct bsc_fd udp_bts_fd; |
| 99 | struct bsc_fd udp_bsc_fd; |
| 100 | |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 101 | /* NS data */ |
| 102 | struct in_addr bts_addr; |
| 103 | struct bsc_fd gprs_ns_fd; |
| 104 | int gprs_local_port; |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 105 | uint16_t gprs_orig_port; |
| 106 | uint32_t gprs_orig_ip; |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 107 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 108 | char *id_tags[0xff]; |
| 109 | u_int8_t *id_resp; |
| 110 | unsigned int id_resp_len; |
| 111 | }; |
| 112 | |
| 113 | enum ipp_fd_type { |
| 114 | OML_FROM_BTS = 1, |
| 115 | RSL_FROM_BTS = 2, |
| 116 | OML_TO_BSC = 3, |
| 117 | RSL_TO_BSC = 4, |
| 118 | UDP_TO_BTS = 5, |
| 119 | UDP_TO_BSC = 6, |
| 120 | }; |
| 121 | |
| 122 | /* some of the code against we link from OpenBSC needs this */ |
| 123 | void *tall_bsc_ctx; |
| 124 | |
| 125 | static char *listen_ipaddr; |
| 126 | static char *bsc_ipaddr; |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 127 | static char *gprs_ns_ipaddr; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 128 | |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 129 | static int make_gprs_sock(struct bsc_fd *bfd, int (*cb)(struct bsc_fd*,unsigned int), void *); |
| 130 | static int gprs_ns_cb(struct bsc_fd *bfd, unsigned int what); |
| 131 | |
Holger Hans Peter Freyther | 3dac881 | 2010-06-09 14:39:22 +0800 | [diff] [blame] | 132 | #define PROXY_ALLOC_SIZE 1200 |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 133 | |
| 134 | static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG }; |
| 135 | static const u_int8_t id_ack[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK }; |
| 136 | static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET, |
| 137 | 0x01, IPAC_IDTAG_UNIT, |
| 138 | 0x01, IPAC_IDTAG_MACADDR, |
| 139 | 0x01, IPAC_IDTAG_LOCATION1, |
| 140 | 0x01, IPAC_IDTAG_LOCATION2, |
| 141 | 0x01, IPAC_IDTAG_EQUIPVERS, |
| 142 | 0x01, IPAC_IDTAG_SWVERSION, |
| 143 | 0x01, IPAC_IDTAG_UNITNAME, |
| 144 | 0x01, IPAC_IDTAG_SERNR, |
| 145 | }; |
| 146 | |
| 147 | static const char *idtag_names[] = { |
| 148 | [IPAC_IDTAG_SERNR] = "Serial_Number", |
| 149 | [IPAC_IDTAG_UNITNAME] = "Unit_Name", |
| 150 | [IPAC_IDTAG_LOCATION1] = "Location_1", |
| 151 | [IPAC_IDTAG_LOCATION2] = "Location_2", |
| 152 | [IPAC_IDTAG_EQUIPVERS] = "Equipment_Version", |
| 153 | [IPAC_IDTAG_SWVERSION] = "Software_Version", |
| 154 | [IPAC_IDTAG_IPADDR] = "IP_Address", |
| 155 | [IPAC_IDTAG_MACADDR] = "MAC_Address", |
| 156 | [IPAC_IDTAG_UNIT] = "Unit_ID", |
| 157 | }; |
| 158 | |
| 159 | static const char *ipac_idtag_name(int tag) |
| 160 | { |
| 161 | if (tag >= ARRAY_SIZE(idtag_names)) |
| 162 | return "unknown"; |
| 163 | |
| 164 | return idtag_names[tag]; |
| 165 | } |
| 166 | |
| 167 | static int ipac_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len) |
| 168 | { |
| 169 | u_int8_t t_len; |
| 170 | u_int8_t t_tag; |
| 171 | u_int8_t *cur = buf; |
| 172 | |
| 173 | while (cur < buf + len) { |
| 174 | t_len = *cur++; |
| 175 | t_tag = *cur++; |
| 176 | |
| 177 | DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur); |
| 178 | |
| 179 | dec->lv[t_tag].len = t_len; |
| 180 | dec->lv[t_tag].val = cur; |
| 181 | |
| 182 | cur += t_len; |
| 183 | } |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id, |
| 188 | u_int16_t *trx_id) |
| 189 | { |
| 190 | unsigned long ul; |
| 191 | char *endptr; |
| 192 | const char *nptr; |
| 193 | |
| 194 | nptr = str; |
| 195 | ul = strtoul(nptr, &endptr, 10); |
| 196 | if (endptr <= nptr) |
| 197 | return -EINVAL; |
| 198 | if (site_id) |
| 199 | *site_id = ul & 0xffff; |
| 200 | |
| 201 | if (*endptr++ != '/') |
| 202 | return -EINVAL; |
| 203 | |
| 204 | nptr = endptr; |
| 205 | ul = strtoul(nptr, &endptr, 10); |
| 206 | if (endptr <= nptr) |
| 207 | return -EINVAL; |
| 208 | if (bts_id) |
| 209 | *bts_id = ul & 0xffff; |
| 210 | |
| 211 | if (*endptr++ != '/') |
| 212 | return -EINVAL; |
| 213 | |
| 214 | nptr = endptr; |
| 215 | ul = strtoul(nptr, &endptr, 10); |
| 216 | if (endptr <= nptr) |
| 217 | return -EINVAL; |
| 218 | if (trx_id) |
| 219 | *trx_id = ul & 0xffff; |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static struct ipa_bts_conn *find_bts_by_unitid(struct ipa_proxy *ipp, |
| 225 | u_int16_t site_id, |
| 226 | u_int16_t bts_id) |
| 227 | { |
| 228 | struct ipa_bts_conn *ipbc; |
| 229 | |
| 230 | llist_for_each_entry(ipbc, &ipp->bts_list, list) { |
| 231 | if (ipbc->unit_id.site_id == site_id && |
| 232 | ipbc->unit_id.bts_id == bts_id) |
| 233 | return ipbc; |
| 234 | } |
| 235 | |
| 236 | return NULL; |
| 237 | } |
| 238 | |
| 239 | struct ipa_proxy_conn *alloc_conn(void) |
| 240 | { |
| 241 | struct ipa_proxy_conn *ipc; |
| 242 | |
| 243 | ipc = talloc_zero(tall_bsc_ctx, struct ipa_proxy_conn); |
| 244 | if (!ipc) |
| 245 | return NULL; |
| 246 | |
| 247 | INIT_LLIST_HEAD(&ipc->tx_queue); |
| 248 | |
| 249 | return ipc; |
| 250 | } |
| 251 | |
| 252 | static int store_idtags(struct ipa_bts_conn *ipbc, struct tlv_parsed *tlvp) |
| 253 | { |
| 254 | unsigned int i, len; |
| 255 | |
| 256 | for (i = 0; i <= 0xff; i++) { |
| 257 | if (!TLVP_PRESENT(tlvp, i)) |
| 258 | continue; |
| 259 | |
| 260 | len = TLVP_LEN(tlvp, i); |
| 261 | #if 0 |
| 262 | if (!ipbc->id_tags[i]) |
| 263 | ipbc->id_tags[i] = talloc_size(tall_bsc_ctx, len); |
| 264 | else |
| 265 | #endif |
Harald Welte | a16ef3d | 2009-12-23 23:35:51 +0100 | [diff] [blame] | 266 | ipbc->id_tags[i] = talloc_realloc_size(ipbc, |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 267 | ipbc->id_tags[i], len); |
| 268 | if (!ipbc->id_tags[i]) |
| 269 | return -ENOMEM; |
| 270 | |
| 271 | memset(ipbc->id_tags[i], 0, len); |
| 272 | //memcpy(ipbc->id_tags[i], TLVP_VAL(tlvp, i), len); |
| 273 | } |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | |
| 278 | static struct ipa_proxy_conn *connect_bsc(struct sockaddr_in *sa, int priv_nr, void *data); |
| 279 | |
| 280 | #define logp_ipbc_uid(ss, lvl, ipbc, trx_id) _logp_ipbc_uid(ss, lvl, __FILE__, __LINE__, ipbc, trx_id) |
| 281 | |
| 282 | static void _logp_ipbc_uid(unsigned int ss, unsigned int lvl, char *file, int line, |
| 283 | struct ipa_bts_conn *ipbc, u_int8_t trx_id) |
| 284 | { |
| 285 | if (ipbc) |
Harald Welte | dc5062b | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 286 | logp2(ss, lvl, file, line, 0, "(%u/%u/%u) ", ipbc->unit_id.site_id, |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 287 | ipbc->unit_id.bts_id, trx_id); |
| 288 | else |
Harald Welte | dc5062b | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 289 | logp2(ss, lvl, file, line, 0, "unknown "); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | /* UDP socket handling */ |
| 293 | |
| 294 | static int make_sock(struct bsc_fd *bfd, u_int16_t port, int proto, int priv_nr, |
| 295 | int (*cb)(struct bsc_fd *fd, unsigned int what), |
| 296 | void *data) |
| 297 | { |
| 298 | struct sockaddr_in addr; |
| 299 | int ret, on = 1; |
| 300 | |
| 301 | bfd->fd = socket(AF_INET, SOCK_DGRAM, proto); |
| 302 | bfd->cb = cb; |
| 303 | bfd->when = BSC_FD_READ; |
| 304 | bfd->data = data; |
| 305 | bfd->priv_nr = priv_nr; |
| 306 | |
| 307 | memset(&addr, 0, sizeof(addr)); |
| 308 | addr.sin_family = AF_INET; |
| 309 | addr.sin_port = htons(port); |
| 310 | addr.sin_addr.s_addr = INADDR_ANY; |
| 311 | |
| 312 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 313 | |
| 314 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 315 | if (ret < 0) { |
| 316 | LOGP(DINP, LOGL_ERROR, "could not bind socket: %s\n", |
| 317 | strerror(errno)); |
| 318 | return -EIO; |
| 319 | } |
| 320 | |
| 321 | ret = bsc_register_fd(bfd); |
| 322 | if (ret < 0) { |
| 323 | perror("register UDP fd"); |
| 324 | return ret; |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static int handle_udp_read(struct bsc_fd *bfd) |
| 330 | { |
| 331 | struct ipa_bts_conn *ipbc = bfd->data; |
| 332 | struct ipa_proxy_conn *other_conn = NULL; |
| 333 | struct msgb *msg = msgb_alloc(PROXY_ALLOC_SIZE, "Abis/IP UDP"); |
| 334 | struct ipaccess_head *hh; |
| 335 | int ret; |
| 336 | |
| 337 | /* with UDP sockets, we cannot read partial packets but have to read |
| 338 | * all of it in one go */ |
| 339 | hh = (struct ipaccess_head *) msg->data; |
| 340 | ret = recv(bfd->fd, msg->data, msg->data_len, 0); |
| 341 | if (ret < 0) { |
Harald Welte | fb33957 | 2009-12-24 13:35:18 +0100 | [diff] [blame] | 342 | if (errno != EAGAIN) |
| 343 | LOGP(DINP, LOGL_ERROR, "recv error %s\n", strerror(errno)); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 344 | msgb_free(msg); |
| 345 | return ret; |
| 346 | } |
| 347 | if (ret == 0) { |
| 348 | DEBUGP(DINP, "UDP peer disappeared, dead socket\n"); |
| 349 | bsc_unregister_fd(bfd); |
| 350 | close(bfd->fd); |
| 351 | bfd->fd = -1; |
| 352 | msgb_free(msg); |
| 353 | return -EIO; |
| 354 | } |
| 355 | if (ret < sizeof(*hh)) { |
| 356 | DEBUGP(DINP, "could not even read header!?!\n"); |
| 357 | msgb_free(msg); |
| 358 | return -EIO; |
| 359 | } |
| 360 | msgb_put(msg, ret); |
| 361 | msg->l2h = msg->data + sizeof(*hh); |
| 362 | DEBUGP(DMI, "UDP RX: %s\n", hexdump(msg->data, msg->len)); |
| 363 | |
| 364 | if (hh->len != msg->len - sizeof(*hh)) { |
| 365 | DEBUGP(DINP, "length (%u/%u) disagrees with header(%u)\n", |
| 366 | msg->len, msg->len - 3, hh->len); |
| 367 | msgb_free(msg); |
| 368 | return -EIO; |
| 369 | } |
| 370 | |
| 371 | switch (bfd->priv_nr & 0xff) { |
| 372 | case UDP_TO_BTS: |
| 373 | /* injection towards BTS */ |
| 374 | switch (hh->proto) { |
| 375 | case IPAC_PROTO_RSL: |
| 376 | /* FIXME: what to do about TRX > 0 */ |
| 377 | other_conn = ipbc->rsl_conn[0]; |
| 378 | break; |
| 379 | default: |
| 380 | DEBUGP(DINP, "Unknown protocol 0x%02x, sending to " |
| 381 | "OML FD\n", hh->proto); |
| 382 | /* fall through */ |
| 383 | case IPAC_PROTO_IPACCESS: |
| 384 | case IPAC_PROTO_OML: |
| 385 | other_conn = ipbc->oml_conn; |
| 386 | break; |
| 387 | } |
| 388 | break; |
| 389 | case UDP_TO_BSC: |
| 390 | /* injection towards BSC */ |
| 391 | switch (hh->proto) { |
| 392 | case IPAC_PROTO_RSL: |
| 393 | /* FIXME: what to do about TRX > 0 */ |
| 394 | other_conn = ipbc->bsc_rsl_conn[0]; |
| 395 | break; |
| 396 | default: |
| 397 | DEBUGP(DINP, "Unknown protocol 0x%02x, sending to " |
| 398 | "OML FD\n", hh->proto); |
| 399 | case IPAC_PROTO_IPACCESS: |
| 400 | case IPAC_PROTO_OML: |
| 401 | other_conn = ipbc->bsc_oml_conn; |
| 402 | break; |
| 403 | } |
| 404 | break; |
| 405 | default: |
| 406 | DEBUGP(DINP, "Unknown filedescriptor priv_nr=%04x\n", bfd->priv_nr); |
| 407 | break; |
| 408 | } |
| 409 | |
| 410 | if (other_conn) { |
| 411 | /* enqueue the message for TX on the respective FD */ |
| 412 | msgb_enqueue(&other_conn->tx_queue, msg); |
| 413 | other_conn->fd.when |= BSC_FD_WRITE; |
| 414 | } else |
| 415 | msgb_free(msg); |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static int handle_udp_write(struct bsc_fd *bfd) |
| 421 | { |
| 422 | /* not implemented yet */ |
| 423 | bfd->when &= ~BSC_FD_WRITE; |
| 424 | |
| 425 | return -EIO; |
| 426 | } |
| 427 | |
| 428 | /* callback from select.c in case one of the fd's can be read/written */ |
| 429 | static int udp_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 430 | { |
| 431 | int rc = 0; |
| 432 | |
| 433 | if (what & BSC_FD_READ) |
| 434 | rc = handle_udp_read(bfd); |
| 435 | if (what & BSC_FD_WRITE) |
| 436 | rc = handle_udp_write(bfd); |
| 437 | |
| 438 | return rc; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | static int ipbc_alloc_connect(struct ipa_proxy_conn *ipc, struct bsc_fd *bfd, |
| 443 | u_int16_t site_id, u_int16_t bts_id, |
| 444 | u_int16_t trx_id, struct tlv_parsed *tlvp, |
| 445 | struct msgb *msg) |
| 446 | { |
| 447 | struct ipa_bts_conn *ipbc; |
| 448 | u_int16_t udp_port; |
| 449 | int ret = 0; |
| 450 | struct sockaddr_in sin; |
| 451 | |
| 452 | memset(&sin, 0, sizeof(sin)); |
| 453 | sin.sin_family = AF_INET; |
| 454 | inet_aton(bsc_ipaddr, &sin.sin_addr); |
| 455 | |
| 456 | DEBUGP(DINP, "(%u/%u/%u) New BTS connection: ", |
| 457 | site_id, bts_id, trx_id); |
| 458 | |
| 459 | /* OML needs to be established before RSL */ |
| 460 | if ((bfd->priv_nr & 0xff) != OML_FROM_BTS) { |
| 461 | DEBUGPC(DINP, "Not a OML connection ?!?\n"); |
| 462 | return -EIO; |
| 463 | } |
| 464 | |
| 465 | /* allocate new BTS connection data structure */ |
| 466 | ipbc = talloc_zero(tall_bsc_ctx, struct ipa_bts_conn); |
| 467 | if (!ipbc) { |
| 468 | ret = -ENOMEM; |
| 469 | goto err_out; |
| 470 | } |
| 471 | |
| 472 | DEBUGPC(DINP, "Created BTS Conn data structure\n"); |
| 473 | ipbc->ipp = ipp; |
| 474 | ipbc->unit_id.site_id = site_id; |
| 475 | ipbc->unit_id.bts_id = bts_id; |
| 476 | ipbc->oml_conn = ipc; |
| 477 | ipc->bts_conn = ipbc; |
| 478 | |
| 479 | /* store the content of the ID TAGS for later reference */ |
| 480 | store_idtags(ipbc, tlvp); |
| 481 | ipbc->id_resp_len = msg->len; |
| 482 | ipbc->id_resp = talloc_size(tall_bsc_ctx, ipbc->id_resp_len); |
| 483 | memcpy(ipbc->id_resp, msg->data, ipbc->id_resp_len); |
| 484 | |
| 485 | /* Create OML TCP connection towards BSC */ |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 486 | sin.sin_port = htons(IPA_TCP_PORT_OML); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 487 | ipbc->bsc_oml_conn = connect_bsc(&sin, OML_TO_BSC, ipbc); |
| 488 | if (!ipbc->bsc_oml_conn) { |
| 489 | ret = -EIO; |
| 490 | goto err_bsc_conn; |
| 491 | } |
| 492 | |
| 493 | DEBUGP(DINP, "(%u/%u/%u) OML Connected to BSC\n", |
| 494 | site_id, bts_id, trx_id); |
| 495 | |
| 496 | /* Create UDP socket for BTS packet injection */ |
| 497 | udp_port = 10000 + (site_id % 1000)*100 + (bts_id % 100); |
| 498 | ret = make_sock(&ipbc->udp_bts_fd, udp_port, IPPROTO_UDP, |
| 499 | UDP_TO_BTS, udp_fd_cb, ipbc); |
| 500 | if (ret < 0) |
| 501 | goto err_udp_bts; |
| 502 | DEBUGP(DINP, "(%u/%u/%u) Created UDP socket for injection " |
| 503 | "towards BTS at port %u\n", site_id, bts_id, trx_id, udp_port); |
| 504 | |
| 505 | /* Create UDP socket for BSC packet injection */ |
| 506 | udp_port = 20000 + (site_id % 1000)*100 + (bts_id % 100); |
| 507 | ret = make_sock(&ipbc->udp_bsc_fd, udp_port, IPPROTO_UDP, |
| 508 | UDP_TO_BSC, udp_fd_cb, ipbc); |
| 509 | if (ret < 0) |
| 510 | goto err_udp_bsc; |
| 511 | DEBUGP(DINP, "(%u/%u/%u) Created UDP socket for injection " |
| 512 | "towards BSC at port %u\n", site_id, bts_id, trx_id, udp_port); |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 513 | |
| 514 | |
| 515 | /* GPRS NS related code */ |
| 516 | if (gprs_ns_ipaddr) { |
| 517 | struct sockaddr_in sock; |
| 518 | socklen_t len = sizeof(sock); |
| 519 | ret = make_gprs_sock(&ipbc->gprs_ns_fd, gprs_ns_cb, ipbc); |
| 520 | if (ret < 0) { |
| 521 | LOGP(DINP, LOGL_ERROR, "Creating the GPRS socket failed.\n"); |
| 522 | goto err_udp_bsc; |
| 523 | } |
| 524 | |
| 525 | ret = getsockname(ipbc->gprs_ns_fd.fd, (struct sockaddr* ) &sock, &len); |
| 526 | ipbc->gprs_local_port = ntohs(sock.sin_port); |
| 527 | LOGP(DINP, LOGL_NOTICE, |
| 528 | "Created GPRS NS Socket. Listening on: %s:%d\n", |
| 529 | inet_ntoa(sock.sin_addr), ipbc->gprs_local_port); |
| 530 | |
| 531 | ret = getpeername(bfd->fd, (struct sockaddr* ) &sock, &len); |
| 532 | ipbc->bts_addr = sock.sin_addr; |
| 533 | } |
| 534 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 535 | llist_add(&ipbc->list, &ipp->bts_list); |
| 536 | |
| 537 | return 0; |
| 538 | |
| 539 | err_udp_bsc: |
| 540 | bsc_unregister_fd(&ipbc->udp_bts_fd); |
| 541 | err_udp_bts: |
| 542 | bsc_unregister_fd(&ipbc->bsc_oml_conn->fd); |
| 543 | close(ipbc->bsc_oml_conn->fd.fd); |
| 544 | talloc_free(ipbc->bsc_oml_conn); |
| 545 | ipbc->bsc_oml_conn = NULL; |
| 546 | err_bsc_conn: |
| 547 | talloc_free(ipbc->id_resp); |
| 548 | talloc_free(ipbc); |
| 549 | #if 0 |
| 550 | bsc_unregister_fd(bfd); |
| 551 | close(bfd->fd); |
| 552 | talloc_free(bfd); |
| 553 | #endif |
| 554 | err_out: |
| 555 | return ret; |
| 556 | } |
| 557 | |
| 558 | static int ipaccess_rcvmsg(struct ipa_proxy_conn *ipc, struct msgb *msg, |
| 559 | struct bsc_fd *bfd) |
| 560 | { |
| 561 | struct tlv_parsed tlvp; |
| 562 | u_int8_t msg_type = *(msg->l2h); |
| 563 | u_int16_t site_id, bts_id, trx_id; |
| 564 | struct ipa_bts_conn *ipbc; |
| 565 | int ret = 0; |
| 566 | |
| 567 | switch (msg_type) { |
| 568 | case IPAC_MSGT_PING: |
| 569 | ret = write(bfd->fd, pong, sizeof(pong)); |
| 570 | if (ret < 0) |
| 571 | return ret; |
| 572 | if (ret < sizeof(pong)) { |
| 573 | DEBUGP(DINP, "short write\n"); |
| 574 | return -EIO; |
| 575 | } |
| 576 | break; |
| 577 | case IPAC_MSGT_PONG: |
| 578 | DEBUGP(DMI, "PONG!\n"); |
| 579 | break; |
| 580 | case IPAC_MSGT_ID_RESP: |
| 581 | DEBUGP(DMI, "ID_RESP "); |
| 582 | /* parse tags, search for Unit ID */ |
| 583 | ipac_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2, |
| 584 | msgb_l2len(msg)-2); |
| 585 | DEBUGP(DMI, "\n"); |
| 586 | |
| 587 | if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) { |
| 588 | LOGP(DINP, LOGL_ERROR, "No Unit ID in ID RESPONSE !?!\n"); |
| 589 | return -EIO; |
| 590 | } |
| 591 | |
| 592 | /* lookup BTS, create sign_link, ... */ |
Holger Hans Peter Freyther | 82ae716 | 2010-03-30 15:20:46 +0200 | [diff] [blame] | 593 | site_id = bts_id = trx_id = 0; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 594 | parse_unitid((char *)TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT), |
| 595 | &site_id, &bts_id, &trx_id); |
| 596 | ipbc = find_bts_by_unitid(ipp, site_id, bts_id); |
| 597 | if (!ipbc) { |
| 598 | /* We have not found an ipbc (per-bts proxy instance) |
| 599 | * for this BTS yet. The first connection of a new BTS must |
| 600 | * be a OML connection. We allocate the associated data structures, |
| 601 | * and try to connect to the remote end */ |
| 602 | |
| 603 | return ipbc_alloc_connect(ipc, bfd, site_id, bts_id, |
| 604 | trx_id, &tlvp, msg); |
| 605 | /* if this fails, the caller will clean up bfd */ |
| 606 | } else { |
| 607 | struct sockaddr_in sin; |
| 608 | memset(&sin, 0, sizeof(sin)); |
| 609 | sin.sin_family = AF_INET; |
| 610 | inet_aton(bsc_ipaddr, &sin.sin_addr); |
| 611 | |
| 612 | DEBUGP(DINP, "Identified BTS %u/%u/%u\n", |
| 613 | site_id, bts_id, trx_id); |
| 614 | |
| 615 | if ((bfd->priv_nr & 0xff) != RSL_FROM_BTS) { |
| 616 | LOGP(DINP, LOGL_ERROR, "Second OML connection from " |
| 617 | "same BTS ?!?\n"); |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | if (trx_id > MAX_TRX) { |
| 622 | LOGP(DINP, LOGL_ERROR, "We don't support more " |
| 623 | "than %u TRX\n", MAX_TRX); |
| 624 | return -EINVAL; |
| 625 | } |
| 626 | |
| 627 | ipc->bts_conn = ipbc; |
| 628 | /* store TRX number in higher 8 bit of the bfd private number */ |
| 629 | bfd->priv_nr |= trx_id << 8; |
| 630 | ipbc->rsl_conn[trx_id] = ipc; |
| 631 | |
| 632 | /* Create RSL TCP connection towards BSC */ |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 633 | sin.sin_port = htons(IPA_TCP_PORT_RSL); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 634 | ipbc->bsc_rsl_conn[trx_id] = |
| 635 | connect_bsc(&sin, RSL_TO_BSC | (trx_id << 8), ipbc); |
| 636 | if (!ipbc->bsc_oml_conn) |
| 637 | return -EIO; |
| 638 | DEBUGP(DINP, "(%u/%u/%u) Connected RSL to BSC\n", |
| 639 | site_id, bts_id, trx_id); |
| 640 | } |
| 641 | break; |
| 642 | case IPAC_MSGT_ID_GET: |
| 643 | DEBUGP(DMI, "ID_GET\n"); |
| 644 | if ((bfd->priv_nr & 0xff) != OML_TO_BSC && |
| 645 | (bfd->priv_nr & 0xff) != RSL_TO_BSC) { |
| 646 | DEBUGP(DINP, "IDentity REQuest from BTS ?!?\n"); |
| 647 | return -EIO; |
| 648 | } |
| 649 | ipbc = ipc->bts_conn; |
| 650 | if (!ipbc) { |
| 651 | DEBUGP(DINP, "ID_GET from BSC before we have ID_RESP from BTS\n"); |
| 652 | return -EIO; |
| 653 | } |
| 654 | ret = write(bfd->fd, ipbc->id_resp, ipbc->id_resp_len); |
| 655 | break; |
| 656 | case IPAC_MSGT_ID_ACK: |
| 657 | DEBUGP(DMI, "ID_ACK? -> ACK!\n"); |
| 658 | ret = write(bfd->fd, id_ack, sizeof(id_ack)); |
| 659 | break; |
Holger Hans Peter Freyther | 0897dad | 2010-06-09 17:38:59 +0800 | [diff] [blame] | 660 | default: |
| 661 | LOGP(DMI, LOGL_ERROR, "Unhandled IPA type; %d\n", msg_type); |
| 662 | return 1; |
| 663 | break; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 664 | } |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error) |
| 669 | { |
| 670 | struct msgb *msg = msgb_alloc(PROXY_ALLOC_SIZE, "Abis/IP"); |
| 671 | struct ipaccess_head *hh; |
| 672 | int len, ret = 0; |
| 673 | |
| 674 | if (!msg) { |
| 675 | *error = -ENOMEM; |
| 676 | return NULL; |
| 677 | } |
| 678 | |
| 679 | /* first read our 3-byte header */ |
| 680 | hh = (struct ipaccess_head *) msg->data; |
| 681 | ret = recv(bfd->fd, msg->data, 3, 0); |
| 682 | if (ret < 0) { |
Harald Welte | fb33957 | 2009-12-24 13:35:18 +0100 | [diff] [blame] | 683 | if (errno != EAGAIN) |
Harald Welte | da95693 | 2009-12-24 12:49:43 +0100 | [diff] [blame] | 684 | LOGP(DINP, LOGL_ERROR, "recv error: %s\n", strerror(errno)); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 685 | msgb_free(msg); |
| 686 | *error = ret; |
| 687 | return NULL; |
| 688 | } else if (ret == 0) { |
| 689 | msgb_free(msg); |
| 690 | *error = ret; |
| 691 | return NULL; |
| 692 | } |
| 693 | |
| 694 | msgb_put(msg, ret); |
| 695 | |
| 696 | /* then read te length as specified in header */ |
| 697 | msg->l2h = msg->data + sizeof(*hh); |
| 698 | len = ntohs(hh->len); |
| 699 | ret = recv(bfd->fd, msg->l2h, len, 0); |
| 700 | if (ret < len) { |
| 701 | LOGP(DINP, LOGL_ERROR, "short read!\n"); |
| 702 | msgb_free(msg); |
| 703 | *error = -EIO; |
| 704 | return NULL; |
| 705 | } |
| 706 | msgb_put(msg, ret); |
| 707 | |
| 708 | return msg; |
| 709 | } |
| 710 | |
| 711 | static struct ipa_proxy_conn *ipc_by_priv_nr(struct ipa_bts_conn *ipbc, |
| 712 | unsigned int priv_nr) |
| 713 | { |
| 714 | struct ipa_proxy_conn *bsc_conn; |
| 715 | unsigned int trx_id = priv_nr >> 8; |
| 716 | |
| 717 | switch (priv_nr & 0xff) { |
| 718 | case OML_FROM_BTS: /* incoming OML data from BTS, forward to BSC OML */ |
| 719 | bsc_conn = ipbc->bsc_oml_conn; |
| 720 | break; |
| 721 | case RSL_FROM_BTS: /* incoming RSL data from BTS, forward to BSC RSL */ |
| 722 | bsc_conn = ipbc->bsc_rsl_conn[trx_id]; |
| 723 | break; |
| 724 | case OML_TO_BSC: /* incoming OML data from BSC, forward to BTS OML */ |
| 725 | bsc_conn = ipbc->oml_conn; |
| 726 | break; |
| 727 | case RSL_TO_BSC: /* incoming RSL data from BSC, forward to BTS RSL */ |
| 728 | bsc_conn = ipbc->rsl_conn[trx_id]; |
| 729 | break; |
| 730 | default: |
| 731 | bsc_conn = NULL; |
| 732 | break; |
| 733 | } |
| 734 | return bsc_conn; |
| 735 | } |
| 736 | |
| 737 | static void reconn_tmr_cb(void *data) |
| 738 | { |
| 739 | struct ipa_proxy *ipp = data; |
| 740 | struct ipa_bts_conn *ipbc; |
| 741 | struct sockaddr_in sin; |
| 742 | int i; |
| 743 | |
| 744 | DEBUGP(DINP, "Running reconnect timer\n"); |
| 745 | |
| 746 | memset(&sin, 0, sizeof(sin)); |
| 747 | sin.sin_family = AF_INET; |
| 748 | inet_aton(bsc_ipaddr, &sin.sin_addr); |
| 749 | |
| 750 | llist_for_each_entry(ipbc, &ipp->bts_list, list) { |
| 751 | /* if OML to BSC is dead, try to restore it */ |
| 752 | if (ipbc->oml_conn && !ipbc->bsc_oml_conn) { |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 753 | sin.sin_port = htons(IPA_TCP_PORT_OML); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 754 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, 0); |
| 755 | LOGPC(DINP, LOGL_NOTICE, "OML Trying to reconnect\n"); |
| 756 | ipbc->bsc_oml_conn = connect_bsc(&sin, OML_TO_BSC, ipbc); |
| 757 | if (!ipbc->bsc_oml_conn) |
| 758 | goto reschedule; |
| 759 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, 0); |
| 760 | LOGPC(DINP, LOGL_NOTICE, "OML Reconnected\n"); |
| 761 | } |
| 762 | /* if we (still) don't have a OML connection, skip RSL */ |
| 763 | if (!ipbc->oml_conn || !ipbc->bsc_oml_conn) |
| 764 | continue; |
| 765 | |
| 766 | for (i = 0; i < ARRAY_SIZE(ipbc->rsl_conn); i++) { |
| 767 | unsigned int priv_nr; |
| 768 | /* don't establish RSL links which we don't have */ |
| 769 | if (!ipbc->rsl_conn[i]) |
| 770 | continue; |
| 771 | if (ipbc->bsc_rsl_conn[i]) |
| 772 | continue; |
| 773 | priv_nr = ipbc->rsl_conn[i]->fd.priv_nr; |
| 774 | priv_nr &= ~0xff; |
| 775 | priv_nr |= RSL_TO_BSC; |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 776 | sin.sin_port = htons(IPA_TCP_PORT_RSL); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 777 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, priv_nr >> 8); |
| 778 | LOGPC(DINP, LOGL_NOTICE, "RSL Trying to reconnect\n"); |
| 779 | ipbc->bsc_rsl_conn[i] = connect_bsc(&sin, priv_nr, ipbc); |
| 780 | if (!ipbc->bsc_rsl_conn) |
| 781 | goto reschedule; |
| 782 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, priv_nr >> 8); |
| 783 | LOGPC(DINP, LOGL_NOTICE, "RSL Reconnected\n"); |
| 784 | } |
| 785 | } |
| 786 | return; |
| 787 | |
| 788 | reschedule: |
| 789 | bsc_schedule_timer(&ipp->reconn_timer, 5, 0); |
| 790 | } |
| 791 | |
| 792 | static void handle_dead_socket(struct bsc_fd *bfd) |
| 793 | { |
| 794 | struct ipa_proxy_conn *ipc = bfd->data; /* local conn */ |
| 795 | struct ipa_proxy_conn *bsc_conn; /* remote conn */ |
| 796 | struct ipa_bts_conn *ipbc = ipc->bts_conn; |
| 797 | unsigned int trx_id = bfd->priv_nr >> 8; |
| 798 | struct msgb *msg, *msg2; |
| 799 | |
| 800 | bsc_unregister_fd(bfd); |
| 801 | close(bfd->fd); |
| 802 | bfd->fd = -1; |
| 803 | |
| 804 | /* FIXME: clear tx_queue, remove all references, etc. */ |
| 805 | llist_for_each_entry_safe(msg, msg2, &ipc->tx_queue, list) |
| 806 | msgb_free(msg); |
| 807 | |
| 808 | switch (bfd->priv_nr & 0xff) { |
| 809 | case OML_FROM_BTS: /* incoming OML data from BTS, forward to BSC OML */ |
| 810 | ipbc->oml_conn = NULL; |
| 811 | bsc_conn = ipbc->bsc_oml_conn; |
| 812 | /* close the connection to the BSC */ |
| 813 | bsc_unregister_fd(&bsc_conn->fd); |
| 814 | close(bsc_conn->fd.fd); |
| 815 | llist_for_each_entry_safe(msg, msg2, &bsc_conn->tx_queue, list) |
| 816 | msgb_free(msg); |
| 817 | talloc_free(bsc_conn); |
| 818 | ipbc->bsc_oml_conn = NULL; |
| 819 | /* FIXME: do we need to delete the entire ipbc ? */ |
| 820 | break; |
| 821 | case RSL_FROM_BTS: /* incoming RSL data from BTS, forward to BSC RSL */ |
| 822 | ipbc->rsl_conn[trx_id] = NULL; |
| 823 | bsc_conn = ipbc->bsc_rsl_conn[trx_id]; |
| 824 | /* close the connection to the BSC */ |
| 825 | bsc_unregister_fd(&bsc_conn->fd); |
| 826 | close(bsc_conn->fd.fd); |
| 827 | llist_for_each_entry_safe(msg, msg2, &bsc_conn->tx_queue, list) |
| 828 | msgb_free(msg); |
| 829 | talloc_free(bsc_conn); |
| 830 | ipbc->bsc_rsl_conn[trx_id] = NULL; |
| 831 | break; |
| 832 | case OML_TO_BSC: /* incoming OML data from BSC, forward to BTS OML */ |
| 833 | ipbc->bsc_oml_conn = NULL; |
| 834 | bsc_conn = ipbc->oml_conn; |
| 835 | /* start reconnect timer */ |
| 836 | bsc_schedule_timer(&ipp->reconn_timer, 5, 0); |
| 837 | break; |
| 838 | case RSL_TO_BSC: /* incoming RSL data from BSC, forward to BTS RSL */ |
| 839 | ipbc->bsc_rsl_conn[trx_id] = NULL; |
| 840 | bsc_conn = ipbc->rsl_conn[trx_id]; |
| 841 | /* start reconnect timer */ |
| 842 | bsc_schedule_timer(&ipp->reconn_timer, 5, 0); |
| 843 | break; |
| 844 | default: |
| 845 | bsc_conn = NULL; |
| 846 | break; |
| 847 | } |
| 848 | |
| 849 | talloc_free(ipc); |
| 850 | } |
| 851 | |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 852 | static void patch_gprs_msg(struct ipa_bts_conn *ipbc, int priv_nr, struct msgb *msg) |
| 853 | { |
| 854 | uint8_t *nsvci; |
| 855 | |
| 856 | if ((priv_nr & 0xff) != OML_FROM_BTS && (priv_nr & 0xff) != OML_TO_BSC) |
| 857 | return; |
| 858 | |
| 859 | if (msgb_l2len(msg) != 39) |
| 860 | return; |
| 861 | |
| 862 | /* |
| 863 | * Check if this is a IPA Set Attribute or IPA Set Attribute ACK |
| 864 | * and if the FOM Class is GPRS NSVC0 and then we will patch it. |
| 865 | * |
| 866 | * The patch assumes the message looks like the one from the trace |
| 867 | * but we only match messages with a specific size anyway... So |
| 868 | * this hack should work just fine. |
| 869 | */ |
| 870 | |
| 871 | if (msg->l2h[0] == 0x10 && msg->l2h[1] == 0x80 && |
| 872 | msg->l2h[2] == 0x00 && msg->l2h[3] == 0x15 && |
| 873 | msg->l2h[18] == 0xf5 && msg->l2h[19] == 0xf2) { |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 874 | nsvci = &msg->l2h[23]; |
| 875 | ipbc->gprs_orig_port = *(u_int16_t *)(nsvci+8); |
| 876 | ipbc->gprs_orig_ip = *(u_int32_t *)(nsvci+10); |
| 877 | *(u_int16_t *)(nsvci+8) = htons(ipbc->gprs_local_port); |
| 878 | *(u_int32_t *)(nsvci+10) = ipbc->ipp->listen_addr.s_addr; |
| 879 | } else if (msg->l2h[0] == 0x10 && msg->l2h[1] == 0x80 && |
| 880 | msg->l2h[2] == 0x00 && msg->l2h[3] == 0x15 && |
| 881 | msg->l2h[18] == 0xf6 && msg->l2h[19] == 0xf2) { |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 882 | nsvci = &msg->l2h[23]; |
| 883 | *(u_int16_t *)(nsvci+8) = ipbc->gprs_orig_port; |
| 884 | *(u_int32_t *)(nsvci+10) = ipbc->gprs_orig_ip; |
| 885 | } |
| 886 | } |
| 887 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 888 | static int handle_tcp_read(struct bsc_fd *bfd) |
| 889 | { |
| 890 | struct ipa_proxy_conn *ipc = bfd->data; |
| 891 | struct ipa_bts_conn *ipbc = ipc->bts_conn; |
| 892 | struct ipa_proxy_conn *bsc_conn; |
Harald Welte | a16ef3d | 2009-12-23 23:35:51 +0100 | [diff] [blame] | 893 | struct msgb *msg; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 894 | struct ipaccess_head *hh; |
| 895 | int ret = 0; |
| 896 | char *btsbsc; |
| 897 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 898 | if ((bfd->priv_nr & 0xff) <= 2) |
| 899 | btsbsc = "BTS"; |
| 900 | else |
| 901 | btsbsc = "BSC"; |
| 902 | |
| 903 | msg = ipaccess_read_msg(bfd, &ret); |
| 904 | if (!msg) { |
| 905 | if (ret == 0) { |
| 906 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, bfd->priv_nr >> 8); |
| 907 | LOGPC(DINP, LOGL_NOTICE, "%s disappeared, " |
| 908 | "dead socket\n", btsbsc); |
| 909 | handle_dead_socket(bfd); |
| 910 | } |
| 911 | return ret; |
| 912 | } |
| 913 | |
| 914 | msgb_put(msg, ret); |
| 915 | logp_ipbc_uid(DMI, LOGL_DEBUG, ipbc, bfd->priv_nr >> 8); |
| 916 | DEBUGPC(DMI, "RX<-%s: %s\n", btsbsc, hexdump(msg->data, msg->len)); |
| 917 | |
| 918 | hh = (struct ipaccess_head *) msg->data; |
| 919 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 920 | ret = ipaccess_rcvmsg(ipc, msg, bfd); |
| 921 | if (ret < 0) { |
| 922 | bsc_unregister_fd(bfd); |
| 923 | close(bfd->fd); |
| 924 | bfd->fd = -1; |
| 925 | talloc_free(bfd); |
Holger Hans Peter Freyther | 0897dad | 2010-06-09 17:38:59 +0800 | [diff] [blame] | 926 | msgb_free(msg); |
| 927 | return ret; |
| 928 | } else if (ret == 0) { |
| 929 | /* we do not forward parts of the CCM protocol |
| 930 | * through the proxy but rather terminate it ourselves. */ |
| 931 | msgb_free(msg); |
| 932 | return ret; |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 933 | } |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 934 | } |
| 935 | |
| 936 | if (!ipbc) { |
| 937 | LOGP(DINP, LOGL_ERROR, |
| 938 | "received %s packet but no ipc->bts_conn?!?\n", btsbsc); |
| 939 | msgb_free(msg); |
| 940 | return -EIO; |
| 941 | } |
| 942 | |
| 943 | bsc_conn = ipc_by_priv_nr(ipbc, bfd->priv_nr); |
| 944 | if (bsc_conn) { |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 945 | if (gprs_ns_ipaddr) |
| 946 | patch_gprs_msg(ipbc, bfd->priv_nr, msg); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 947 | /* enqueue packet towards BSC */ |
| 948 | msgb_enqueue(&bsc_conn->tx_queue, msg); |
| 949 | /* mark respective filedescriptor as 'we want to write' */ |
| 950 | bsc_conn->fd.when |= BSC_FD_WRITE; |
| 951 | } else { |
| 952 | logp_ipbc_uid(DINP, LOGL_INFO, ipbc, bfd->priv_nr >> 8); |
| 953 | LOGPC(DINP, LOGL_INFO, "Dropping packet from %s, " |
| 954 | "since remote connection is dead\n", btsbsc); |
| 955 | msgb_free(msg); |
| 956 | } |
| 957 | |
| 958 | return ret; |
| 959 | } |
| 960 | |
| 961 | /* a TCP socket is ready to be written to */ |
| 962 | static int handle_tcp_write(struct bsc_fd *bfd) |
| 963 | { |
| 964 | struct ipa_proxy_conn *ipc = bfd->data; |
| 965 | struct ipa_bts_conn *ipbc = ipc->bts_conn; |
| 966 | struct llist_head *lh; |
| 967 | struct msgb *msg; |
| 968 | char *btsbsc; |
| 969 | int ret; |
| 970 | |
| 971 | if ((bfd->priv_nr & 0xff) <= 2) |
| 972 | btsbsc = "BTS"; |
| 973 | else |
| 974 | btsbsc = "BSC"; |
| 975 | |
| 976 | |
| 977 | /* get the next msg for this timeslot */ |
| 978 | if (llist_empty(&ipc->tx_queue)) { |
| 979 | bfd->when &= ~BSC_FD_WRITE; |
| 980 | return 0; |
| 981 | } |
| 982 | lh = ipc->tx_queue.next; |
| 983 | llist_del(lh); |
| 984 | msg = llist_entry(lh, struct msgb, list); |
| 985 | |
| 986 | logp_ipbc_uid(DMI, LOGL_DEBUG, ipbc, bfd->priv_nr >> 8); |
| 987 | DEBUGPC(DMI, "TX %04x: %s\n", bfd->priv_nr, |
| 988 | hexdump(msg->data, msg->len)); |
| 989 | |
| 990 | ret = send(bfd->fd, msg->data, msg->len, 0); |
| 991 | msgb_free(msg); |
| 992 | |
| 993 | if (ret == 0) { |
| 994 | logp_ipbc_uid(DINP, LOGL_NOTICE, ipbc, bfd->priv_nr >> 8); |
| 995 | LOGP(DINP, LOGL_NOTICE, "%s disappeared, dead socket\n", btsbsc); |
| 996 | handle_dead_socket(bfd); |
| 997 | } |
| 998 | |
| 999 | return ret; |
| 1000 | } |
| 1001 | |
| 1002 | /* callback from select.c in case one of the fd's can be read/written */ |
| 1003 | static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 1004 | { |
| 1005 | int rc = 0; |
| 1006 | |
| 1007 | if (what & BSC_FD_READ) { |
| 1008 | rc = handle_tcp_read(bfd); |
| 1009 | if (rc < 0) |
| 1010 | return rc; |
| 1011 | } |
| 1012 | if (what & BSC_FD_WRITE) |
| 1013 | rc = handle_tcp_write(bfd); |
| 1014 | |
| 1015 | return rc; |
| 1016 | } |
| 1017 | |
| 1018 | /* callback of the listening filedescriptor */ |
| 1019 | static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 1020 | { |
| 1021 | int ret; |
| 1022 | struct ipa_proxy_conn *ipc; |
| 1023 | struct bsc_fd *bfd; |
| 1024 | struct sockaddr_in sa; |
| 1025 | socklen_t sa_len = sizeof(sa); |
| 1026 | |
| 1027 | if (!(what & BSC_FD_READ)) |
| 1028 | return 0; |
| 1029 | |
| 1030 | ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 1031 | if (ret < 0) { |
| 1032 | perror("accept"); |
| 1033 | return ret; |
| 1034 | } |
Holger Hans Peter Freyther | acf8a0c | 2010-03-29 08:47:44 +0200 | [diff] [blame] | 1035 | DEBUGP(DINP, "accept()ed new %s link from %s\n", |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1036 | (listen_bfd->priv_nr & 0xff) == OML_FROM_BTS ? "OML" : "RSL", |
| 1037 | inet_ntoa(sa.sin_addr)); |
| 1038 | |
| 1039 | ipc = alloc_conn(); |
| 1040 | if (!ipc) { |
| 1041 | close(ret); |
| 1042 | return -ENOMEM; |
| 1043 | } |
| 1044 | |
| 1045 | bfd = &ipc->fd; |
| 1046 | bfd->fd = ret; |
| 1047 | bfd->data = ipc; |
| 1048 | bfd->priv_nr = listen_bfd->priv_nr; |
| 1049 | bfd->cb = ipaccess_fd_cb; |
| 1050 | bfd->when = BSC_FD_READ; |
| 1051 | ret = bsc_register_fd(bfd); |
| 1052 | if (ret < 0) { |
| 1053 | LOGP(DINP, LOGL_ERROR, "could not register FD\n"); |
| 1054 | close(bfd->fd); |
| 1055 | talloc_free(ipc); |
| 1056 | return ret; |
| 1057 | } |
| 1058 | |
| 1059 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
| 1060 | ret = write(bfd->fd, id_req, sizeof(id_req)); |
| 1061 | |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1065 | static void send_ns(int fd, const char *buf, int size, struct in_addr ip, int port) |
| 1066 | { |
| 1067 | int ret; |
| 1068 | struct sockaddr_in addr; |
| 1069 | socklen_t len = sizeof(addr); |
| 1070 | memset(&addr, 0, sizeof(addr)); |
| 1071 | |
| 1072 | addr.sin_family = AF_INET; |
Holger Hans Peter Freyther | 21e1c0d | 2010-06-10 15:56:26 +0800 | [diff] [blame] | 1073 | addr.sin_port = htons(port); |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1074 | addr.sin_addr = ip; |
| 1075 | |
| 1076 | ret = sendto(fd, buf, size, 0, (struct sockaddr *) &addr, len); |
| 1077 | if (ret < 0) { |
| 1078 | LOGP(DINP, LOGL_ERROR, "Failed to forward GPRS message.\n"); |
| 1079 | } |
| 1080 | } |
| 1081 | |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1082 | static int gprs_ns_cb(struct bsc_fd *bfd, unsigned int what) |
| 1083 | { |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1084 | struct ipa_bts_conn *bts; |
| 1085 | char buf[4096]; |
| 1086 | int ret; |
| 1087 | struct sockaddr_in sock; |
| 1088 | socklen_t len = sizeof(sock); |
| 1089 | |
| 1090 | /* 1. get the data... */ |
| 1091 | ret = recvfrom(bfd->fd, buf, sizeof(buf), 0, (struct sockaddr *) &sock, &len); |
| 1092 | if (ret < 0) { |
| 1093 | LOGP(DINP, LOGL_ERROR, "Failed to recv GPRS NS msg: %s.\n", strerror(errno)); |
| 1094 | return -1; |
| 1095 | } |
| 1096 | |
| 1097 | bts = bfd->data; |
| 1098 | |
| 1099 | /* 2. figure out where to send it to */ |
| 1100 | if (memcmp(&sock.sin_addr, &ipp->gprs_addr, sizeof(sock.sin_addr)) == 0) { |
| 1101 | LOGP(DINP, LOGL_DEBUG, "GPRS NS msg from network.\n"); |
| 1102 | send_ns(bfd->fd, buf, ret, bts->bts_addr, 23000); |
| 1103 | } else if (memcmp(&sock.sin_addr, &bts->bts_addr, sizeof(sock.sin_addr)) == 0) { |
| 1104 | LOGP(DINP, LOGL_DEBUG, "GPRS NS msg from BTS.\n"); |
| 1105 | send_ns(bfd->fd, buf, ret, ipp->gprs_addr, 23000); |
Holger Hans Peter Freyther | 21e1c0d | 2010-06-10 15:56:26 +0800 | [diff] [blame] | 1106 | } else { |
| 1107 | LOGP(DINP, LOGL_ERROR, "Unknown GPRS source: %s\n", inet_ntoa(sock.sin_addr)); |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1108 | } |
| 1109 | |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1110 | return 0; |
| 1111 | } |
| 1112 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1113 | static int make_listen_sock(struct bsc_fd *bfd, u_int16_t port, int priv_nr, |
| 1114 | int (*cb)(struct bsc_fd *fd, unsigned int what)) |
| 1115 | { |
| 1116 | struct sockaddr_in addr; |
| 1117 | int ret, on = 1; |
| 1118 | |
| 1119 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 1120 | bfd->cb = cb; |
| 1121 | bfd->when = BSC_FD_READ; |
| 1122 | bfd->priv_nr = priv_nr; |
| 1123 | |
| 1124 | memset(&addr, 0, sizeof(addr)); |
| 1125 | addr.sin_family = AF_INET; |
| 1126 | addr.sin_port = htons(port); |
| 1127 | if (!listen_ipaddr) |
| 1128 | addr.sin_addr.s_addr = INADDR_ANY; |
| 1129 | else |
| 1130 | inet_aton(listen_ipaddr, &addr.sin_addr); |
| 1131 | |
| 1132 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 1133 | |
| 1134 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 1135 | if (ret < 0) { |
Holger Hans Peter Freyther | 7670651 | 2010-06-09 15:17:53 +0800 | [diff] [blame] | 1136 | LOGP(DINP, LOGL_ERROR, |
| 1137 | "Could not bind listen socket for IP %s with error: %s.\n", |
| 1138 | listen_ipaddr, strerror(errno)); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1139 | return -EIO; |
| 1140 | } |
| 1141 | |
| 1142 | ret = listen(bfd->fd, 1); |
| 1143 | if (ret < 0) { |
| 1144 | perror("listen"); |
| 1145 | return ret; |
| 1146 | } |
| 1147 | |
| 1148 | ret = bsc_register_fd(bfd); |
| 1149 | if (ret < 0) { |
| 1150 | perror("register_listen_fd"); |
| 1151 | return ret; |
| 1152 | } |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1156 | static int make_gprs_sock(struct bsc_fd *bfd, int (*cb)(struct bsc_fd*,unsigned int), void *data) |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1157 | { |
| 1158 | struct sockaddr_in addr; |
| 1159 | int ret; |
| 1160 | |
| 1161 | bfd->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
| 1162 | bfd->cb = cb; |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1163 | bfd->data = data; |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1164 | bfd->when = BSC_FD_READ; |
| 1165 | |
| 1166 | memset(&addr, 0, sizeof(addr)); |
| 1167 | addr.sin_family = AF_INET; |
| 1168 | addr.sin_port = 0; |
| 1169 | inet_aton(listen_ipaddr, &addr.sin_addr); |
| 1170 | |
| 1171 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 1172 | if (ret < 0) { |
| 1173 | LOGP(DINP, LOGL_ERROR, |
| 1174 | "Could not bind n socket for IP %s with error: %s.\n", |
| 1175 | listen_ipaddr, strerror(errno)); |
| 1176 | return -EIO; |
| 1177 | } |
| 1178 | |
| 1179 | ret = bsc_register_fd(bfd); |
| 1180 | if (ret < 0) { |
| 1181 | perror("register_listen_fd"); |
| 1182 | return ret; |
| 1183 | } |
| 1184 | return 0; |
| 1185 | } |
| 1186 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1187 | /* Actively connect to a BSC. */ |
| 1188 | static struct ipa_proxy_conn *connect_bsc(struct sockaddr_in *sa, int priv_nr, void *data) |
| 1189 | { |
| 1190 | struct ipa_proxy_conn *ipc; |
| 1191 | struct bsc_fd *bfd; |
| 1192 | int ret, on = 1; |
| 1193 | |
| 1194 | ipc = alloc_conn(); |
| 1195 | if (!ipc) |
| 1196 | return NULL; |
| 1197 | |
| 1198 | ipc->bts_conn = data; |
| 1199 | |
| 1200 | bfd = &ipc->fd; |
| 1201 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 1202 | bfd->cb = ipaccess_fd_cb; |
| 1203 | bfd->when = BSC_FD_READ | BSC_FD_WRITE; |
| 1204 | bfd->data = ipc; |
| 1205 | bfd->priv_nr = priv_nr; |
| 1206 | |
| 1207 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 1208 | |
| 1209 | ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa)); |
| 1210 | if (ret < 0) { |
Holger Hans Peter Freyther | 6cb9b23 | 2010-06-09 15:15:11 +0800 | [diff] [blame] | 1211 | LOGP(DINP, LOGL_ERROR, "Could not connect socket: %s\n", |
| 1212 | inet_ntoa(sa->sin_addr)); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1213 | close(bfd->fd); |
| 1214 | talloc_free(ipc); |
| 1215 | return NULL; |
| 1216 | } |
| 1217 | |
| 1218 | /* pre-fill tx_queue with identity request */ |
| 1219 | ret = bsc_register_fd(bfd); |
| 1220 | if (ret < 0) { |
| 1221 | close(bfd->fd); |
| 1222 | talloc_free(ipc); |
| 1223 | return NULL; |
| 1224 | } |
| 1225 | |
| 1226 | return ipc; |
| 1227 | } |
| 1228 | |
| 1229 | static int ipaccess_proxy_setup(void) |
| 1230 | { |
| 1231 | int ret; |
| 1232 | |
| 1233 | ipp = talloc_zero(tall_bsc_ctx, struct ipa_proxy); |
| 1234 | if (!ipp) |
| 1235 | return -ENOMEM; |
| 1236 | INIT_LLIST_HEAD(&ipp->bts_list); |
| 1237 | ipp->reconn_timer.cb = reconn_tmr_cb; |
| 1238 | ipp->reconn_timer.data = ipp; |
| 1239 | |
| 1240 | /* Listen for OML connections */ |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 1241 | ret = make_listen_sock(&ipp->oml_listen_fd, IPA_TCP_PORT_OML, |
| 1242 | OML_FROM_BTS, listen_fd_cb); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1243 | if (ret < 0) |
| 1244 | return ret; |
| 1245 | |
| 1246 | /* Listen for RSL connections */ |
Harald Welte | 87ed5cd | 2009-12-23 22:47:53 +0100 | [diff] [blame] | 1247 | ret = make_listen_sock(&ipp->rsl_listen_fd, IPA_TCP_PORT_RSL, |
| 1248 | RSL_FROM_BTS, listen_fd_cb); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1249 | |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1250 | if (ret < 0) |
| 1251 | return ret; |
| 1252 | |
| 1253 | /* Connect the GPRS NS Socket */ |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 1254 | if (gprs_ns_ipaddr) { |
Holger Hans Peter Freyther | 952aba7 | 2010-06-09 17:07:43 +0800 | [diff] [blame] | 1255 | inet_aton(gprs_ns_ipaddr, &ipp->gprs_addr); |
Holger Hans Peter Freyther | 4fe22cc | 2010-06-10 15:57:08 +0800 | [diff] [blame] | 1256 | inet_aton(listen_ipaddr, &ipp->listen_addr); |
| 1257 | } |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1258 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1259 | return ret; |
| 1260 | } |
| 1261 | |
| 1262 | static void signal_handler(int signal) |
| 1263 | { |
| 1264 | fprintf(stdout, "signal %u received\n", signal); |
| 1265 | |
| 1266 | switch (signal) { |
| 1267 | case SIGABRT: |
| 1268 | /* in case of abort, we want to obtain a talloc report |
| 1269 | * and then return to the caller, who will abort the process */ |
| 1270 | case SIGUSR1: |
| 1271 | talloc_report_full(tall_bsc_ctx, stderr); |
| 1272 | break; |
| 1273 | default: |
| 1274 | break; |
| 1275 | } |
| 1276 | } |
| 1277 | |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1278 | static void print_help() |
| 1279 | { |
| 1280 | printf(" ipaccess-proxy is a proxy BTS.\n"); |
| 1281 | printf(" -h --help. This help text.\n"); |
| 1282 | printf(" -l --listen IP. The ip to listen to.\n"); |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1283 | printf(" -b --bsc IP. The BSC IP address.\n"); |
| 1284 | printf(" -g --gprs IP. Take GPRS NS from that IP.\n"); |
| 1285 | printf("\n"); |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1286 | printf(" -s --disable-color. Disable the color inside the logging message.\n"); |
| 1287 | printf(" -e --log-level number. Set the global loglevel.\n"); |
| 1288 | printf(" -T --timestamp. Prefix every log message with a timestamp.\n"); |
| 1289 | printf(" -V --version. Print the version of OpenBSC.\n"); |
| 1290 | } |
| 1291 | |
| 1292 | static void print_usage() |
| 1293 | { |
| 1294 | printf("Usage: ipaccess-proxy\n"); |
| 1295 | } |
| 1296 | |
| 1297 | static void handle_options(int argc, char** argv) |
| 1298 | { |
| 1299 | while (1) { |
| 1300 | int option_index = 0, c; |
| 1301 | static struct option long_options[] = { |
| 1302 | {"help", 0, 0, 'h'}, |
| 1303 | {"disable-color", 0, 0, 's'}, |
| 1304 | {"timestamp", 0, 0, 'T'}, |
| 1305 | {"log-level", 1, 0, 'e'}, |
| 1306 | {"listen", 1, 0, 'l'}, |
| 1307 | {"bsc", 1, 0, 'b'}, |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1308 | {"udp", 1, 0, 'u'}, |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1309 | {0, 0, 0, 0} |
| 1310 | }; |
| 1311 | |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1312 | c = getopt_long(argc, argv, "hsTe:l:b:g:", |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1313 | long_options, &option_index); |
| 1314 | if (c == -1) |
| 1315 | break; |
| 1316 | |
| 1317 | switch (c) { |
| 1318 | case 'h': |
| 1319 | print_usage(); |
| 1320 | print_help(); |
| 1321 | exit(0); |
| 1322 | case 'l': |
| 1323 | listen_ipaddr = optarg; |
| 1324 | break; |
| 1325 | case 'b': |
| 1326 | bsc_ipaddr = optarg; |
| 1327 | break; |
Holger Hans Peter Freyther | 6147c5d | 2010-06-09 16:20:39 +0800 | [diff] [blame] | 1328 | case 'g': |
| 1329 | gprs_ns_ipaddr = optarg; |
| 1330 | break; |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1331 | case 's': |
| 1332 | log_set_use_color(stderr_target, 0); |
| 1333 | break; |
| 1334 | case 'T': |
| 1335 | log_set_print_timestamp(stderr_target, 1); |
| 1336 | break; |
| 1337 | case 'e': |
| 1338 | log_set_log_level(stderr_target, atoi(optarg)); |
| 1339 | break; |
| 1340 | default: |
| 1341 | /* ignore */ |
| 1342 | break; |
| 1343 | } |
| 1344 | } |
| 1345 | } |
| 1346 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1347 | int main(int argc, char **argv) |
| 1348 | { |
| 1349 | int rc; |
| 1350 | |
| 1351 | listen_ipaddr = "192.168.100.11"; |
| 1352 | bsc_ipaddr = "192.168.100.239"; |
| 1353 | |
| 1354 | tall_bsc_ctx = talloc_named_const(NULL, 1, "ipaccess-proxy"); |
| 1355 | |
Harald Welte | dc5062b | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 1356 | log_init(&log_info); |
| 1357 | stderr_target = log_target_create_stderr(); |
| 1358 | log_add_target(stderr_target); |
| 1359 | log_set_all_filter(stderr_target, 1); |
| 1360 | log_parse_category_mask(stderr_target, "DINP:DMI"); |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1361 | |
Holger Hans Peter Freyther | 1a0c2b7 | 2010-06-09 14:59:09 +0800 | [diff] [blame] | 1362 | handle_options(argc, argv); |
| 1363 | |
Harald Welte | 2ca7c31 | 2009-12-23 22:44:04 +0100 | [diff] [blame] | 1364 | rc = ipaccess_proxy_setup(); |
| 1365 | if (rc < 0) |
| 1366 | exit(1); |
| 1367 | |
| 1368 | signal(SIGUSR1, &signal_handler); |
| 1369 | signal(SIGABRT, &signal_handler); |
| 1370 | |
| 1371 | while (1) { |
| 1372 | bsc_select_main(0); |
| 1373 | } |
| 1374 | } |