Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 1 | /* OpenBSC Abis input driver for ip.access */ |
| 2 | |
| 3 | /* (C) 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 General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 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 General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <unistd.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <errno.h> |
| 27 | #include <string.h> |
| 28 | #include <time.h> |
| 29 | #include <sys/fcntl.h> |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <sys/ioctl.h> |
| 33 | #include <arpa/inet.h> |
| 34 | |
| 35 | #include <openbsc/select.h> |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 36 | #include <openbsc/tlv.h> |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 37 | #include <openbsc/msgb.h> |
| 38 | #include <openbsc/debug.h> |
| 39 | #include <openbsc/gsm_data.h> |
| 40 | #include <openbsc/abis_nm.h> |
| 41 | #include <openbsc/abis_rsl.h> |
| 42 | #include <openbsc/subchan_demux.h> |
| 43 | #include <openbsc/e1_input.h> |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 44 | #include <openbsc/ipaccess.h> |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 45 | #include <openbsc/talloc.h> |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 46 | |
| 47 | /* data structure for one E1 interface with A-bis */ |
| 48 | struct ia_e1_handle { |
| 49 | struct bsc_fd listen_fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 50 | struct bsc_fd rsl_listen_fd; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 51 | struct gsm_network *gsmnet; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 52 | }; |
| 53 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 54 | static struct ia_e1_handle *e1h; |
| 55 | |
| 56 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 57 | #define TS1_ALLOC_SIZE 300 |
| 58 | |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 59 | static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG }; |
| 60 | static const u_int8_t id_ack[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK }; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 61 | static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET, |
| 62 | 0x01, IPAC_IDTAG_UNIT, |
| 63 | 0x01, IPAC_IDTAG_MACADDR, |
| 64 | 0x01, IPAC_IDTAG_LOCATION1, |
| 65 | 0x01, IPAC_IDTAG_LOCATION2, |
| 66 | 0x01, IPAC_IDTAG_EQUIPVERS, |
| 67 | 0x01, IPAC_IDTAG_SWVERSION, |
| 68 | 0x01, IPAC_IDTAG_UNITNAME, |
| 69 | 0x01, IPAC_IDTAG_SERNR, |
| 70 | }; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 71 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 72 | static const char *idtag_names[] = { |
| 73 | [IPAC_IDTAG_SERNR] = "Serial_Number", |
| 74 | [IPAC_IDTAG_UNITNAME] = "Unit_Name", |
| 75 | [IPAC_IDTAG_LOCATION1] = "Location_1", |
| 76 | [IPAC_IDTAG_LOCATION2] = "Location_2", |
| 77 | [IPAC_IDTAG_EQUIPVERS] = "Equipment_Version", |
| 78 | [IPAC_IDTAG_SWVERSION] = "Software_Version", |
| 79 | [IPAC_IDTAG_IPADDR] = "IP_Address", |
| 80 | [IPAC_IDTAG_MACADDR] = "MAC_Address", |
| 81 | [IPAC_IDTAG_UNIT] = "Unit_ID", |
| 82 | }; |
| 83 | |
| 84 | static const char *ipac_idtag_name(int tag) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 85 | { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 86 | if (tag >= ARRAY_SIZE(idtag_names)) |
| 87 | return "unknown"; |
| 88 | |
| 89 | return idtag_names[tag]; |
| 90 | } |
| 91 | |
| 92 | static int ipac_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len) |
| 93 | { |
| 94 | u_int8_t t_len; |
| 95 | u_int8_t t_tag; |
| 96 | u_int8_t *cur = buf; |
| 97 | |
| 98 | while (cur < buf + len) { |
| 99 | t_len = *cur++; |
| 100 | t_tag = *cur++; |
| 101 | |
| 102 | DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur); |
| 103 | |
| 104 | dec->lv[t_tag].len = t_len; |
| 105 | dec->lv[t_tag].val = cur; |
| 106 | |
| 107 | cur += t_len; |
| 108 | } |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | struct gsm_bts *find_bts_by_unitid(struct gsm_network *net, |
| 113 | u_int16_t site_id, u_int16_t bts_id) |
| 114 | { |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 115 | struct gsm_bts *bts; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 116 | |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 117 | llist_for_each_entry(bts, &net->bts_list, list) { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 118 | |
| 119 | if (!is_ipaccess_bts(bts)) |
| 120 | continue; |
| 121 | |
| 122 | if (bts->ip_access.site_id == site_id && |
| 123 | bts->ip_access.bts_id == bts_id) |
| 124 | return bts; |
| 125 | } |
| 126 | |
| 127 | return NULL; |
| 128 | } |
| 129 | |
| 130 | static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id, |
| 131 | u_int16_t *trx_id) |
| 132 | { |
| 133 | unsigned long ul; |
| 134 | char *endptr; |
| 135 | const char *nptr; |
| 136 | |
| 137 | nptr = str; |
| 138 | ul = strtoul(nptr, &endptr, 10); |
| 139 | if (endptr <= nptr) |
| 140 | return -EINVAL; |
| 141 | if (site_id) |
| 142 | *site_id = ul & 0xffff; |
| 143 | |
| 144 | if (*endptr++ != '/') |
| 145 | return -EINVAL; |
| 146 | |
| 147 | nptr = endptr; |
| 148 | ul = strtoul(nptr, &endptr, 10); |
| 149 | if (endptr <= nptr) |
| 150 | return -EINVAL; |
| 151 | if (bts_id) |
| 152 | *bts_id = ul & 0xffff; |
| 153 | |
| 154 | if (*endptr++ != '/') |
| 155 | return -EINVAL; |
| 156 | |
| 157 | nptr = endptr; |
| 158 | ul = strtoul(nptr, &endptr, 10); |
| 159 | if (endptr <= nptr) |
| 160 | return -EINVAL; |
| 161 | if (trx_id) |
| 162 | *trx_id = ul & 0xffff; |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 167 | /* base handling of the ip.access protocol */ |
| 168 | int ipaccess_rcvmsg_base(struct msgb *msg, |
| 169 | struct bsc_fd *bfd) |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 170 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 171 | u_int8_t msg_type = *(msg->l2h); |
Holger Freyther | ff9592f | 2009-03-09 16:17:14 +0000 | [diff] [blame] | 172 | int ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 173 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 174 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 175 | case IPAC_MSGT_PING: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 176 | ret = write(bfd->fd, pong, sizeof(pong)); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 177 | break; |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 178 | case IPAC_MSGT_PONG: |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 179 | DEBUGP(DMI, "PONG!\n"); |
| 180 | break; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 181 | case IPAC_MSGT_ID_ACK: |
| 182 | DEBUGP(DMI, "ID_ACK? -> ACK!\n"); |
| 183 | ret = write(bfd->fd, id_ack, sizeof(id_ack)); |
| 184 | break; |
| 185 | } |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg, |
| 190 | struct bsc_fd *bfd) |
| 191 | { |
| 192 | struct tlv_parsed tlvp; |
| 193 | u_int8_t msg_type = *(msg->l2h); |
| 194 | u_int16_t site_id = 0, bts_id = 0, trx_id = 0; |
| 195 | struct gsm_bts *bts; |
| 196 | |
| 197 | /* handle base messages */ |
| 198 | ipaccess_rcvmsg_base(msg, bfd); |
| 199 | |
| 200 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 201 | case IPAC_MSGT_ID_RESP: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 202 | DEBUGP(DMI, "ID_RESP "); |
| 203 | /* parse tags, search for Unit ID */ |
| 204 | ipac_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2, |
| 205 | msgb_l2len(msg)-2); |
| 206 | DEBUGP(DMI, "\n"); |
| 207 | |
| 208 | if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) |
| 209 | break; |
| 210 | |
| 211 | /* lookup BTS, create sign_link, ... */ |
| 212 | parse_unitid((char *)TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT), |
| 213 | &site_id, &bts_id, &trx_id); |
| 214 | bts = find_bts_by_unitid(e1h->gsmnet, site_id, bts_id); |
| 215 | if (!bts) { |
| 216 | DEBUGP(DINP, "Unable to find BTS configuration for " |
| 217 | " %u/%u/%u, disconnecting\n", site_id, bts_id, |
| 218 | trx_id); |
| 219 | return -EIO; |
| 220 | } |
| 221 | DEBUGP(DINP, "Identified BTS %u/%u/%u\n", site_id, bts_id, trx_id); |
| 222 | if (bfd->priv_nr == 1) { |
| 223 | bts->oml_link = e1inp_sign_link_create(&line->ts[1-1], |
| 224 | E1INP_SIGN_OML, bts->c0, |
| 225 | 0, 0xff); |
| 226 | } else if (bfd->priv_nr == 2) { |
| 227 | struct e1inp_ts *e1i_ts; |
| 228 | struct bsc_fd *newbfd; |
| 229 | |
| 230 | /* FIXME: implement this for non-0 TRX */ |
| 231 | bfd->data = line = bts->oml_link->ts->line; |
| 232 | e1i_ts = &line->ts[2-1]; |
| 233 | newbfd = &e1i_ts->driver.ipaccess.fd; |
| 234 | |
| 235 | bts->c0->rsl_link = |
| 236 | e1inp_sign_link_create(e1i_ts, |
| 237 | E1INP_SIGN_RSL, bts->c0, |
| 238 | 0, 0); |
| 239 | /* get rid of our old temporary bfd */ |
| 240 | memcpy(newbfd, bfd, sizeof(*newbfd)); |
| 241 | bsc_unregister_fd(bfd); |
| 242 | bsc_register_fd(newbfd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 243 | talloc_free(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 244 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 245 | break; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 246 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 247 | return 0; |
| 248 | } |
| 249 | |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 250 | /* FIXME: this is per BTS */ |
| 251 | static int oml_up = 0; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 252 | static int rsl_up = 0; |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 253 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 254 | /* |
| 255 | * read one ipa message from the socket |
| 256 | * return NULL in case of error |
| 257 | */ |
| 258 | struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 259 | { |
Harald Welte | 966636f | 2009-06-26 19:39:35 +0200 | [diff] [blame] | 260 | struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "Abis/IP"); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 261 | struct ipaccess_head *hh; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 262 | int ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 263 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 264 | if (!msg) { |
| 265 | *error = -ENOMEM; |
| 266 | return NULL; |
| 267 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 268 | |
| 269 | /* first read our 3-byte header */ |
| 270 | hh = (struct ipaccess_head *) msg->data; |
| 271 | ret = recv(bfd->fd, msg->data, 3, 0); |
| 272 | if (ret < 0) { |
| 273 | fprintf(stderr, "recv error %s\n", strerror(errno)); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 274 | msgb_free(msg); |
| 275 | *error = ret; |
| 276 | return NULL; |
| 277 | } else if (ret == 0) { |
| 278 | msgb_free(msg); |
| 279 | *error = ret; |
| 280 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 281 | } |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 282 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 283 | msgb_put(msg, ret); |
| 284 | |
| 285 | /* then read te length as specified in header */ |
| 286 | msg->l2h = msg->data + sizeof(*hh); |
| 287 | ret = recv(bfd->fd, msg->l2h, hh->len, 0); |
| 288 | if (ret < hh->len) { |
| 289 | fprintf(stderr, "short read!\n"); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 290 | msgb_free(msg); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 291 | *error = -EIO; |
| 292 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 293 | } |
| 294 | msgb_put(msg, ret); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 295 | |
| 296 | return msg; |
| 297 | } |
| 298 | |
| 299 | static int handle_ts1_read(struct bsc_fd *bfd) |
| 300 | { |
| 301 | struct e1inp_line *line = bfd->data; |
| 302 | unsigned int ts_nr = bfd->priv_nr; |
| 303 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 304 | struct e1inp_sign_link *link; |
| 305 | struct msgb *msg; |
| 306 | struct ipaccess_head *hh; |
| 307 | int ret, error; |
| 308 | |
| 309 | msg = ipaccess_read_msg(bfd, &error); |
| 310 | if (!msg) { |
| 311 | if (error == 0) { |
| 312 | fprintf(stderr, "BTS disappeared, dead socket\n"); |
| 313 | e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_RSL); |
| 314 | e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_OML); |
| 315 | bsc_unregister_fd(bfd); |
| 316 | close(bfd->fd); |
| 317 | bfd->fd = -1; |
| 318 | } |
| 319 | return error; |
| 320 | } |
| 321 | |
Sylvain Munaut | 86538c7 | 2009-09-30 22:35:04 +0200 | [diff] [blame] | 322 | DEBUGP(DMI, "RX %u: %s\n", ts_nr, hexdump(msgb_l2(msg), msgb_l2len(msg))); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 323 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 324 | hh = (struct ipaccess_head *) msg->data; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 325 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 326 | ret = ipaccess_rcvmsg(line, msg, bfd); |
| 327 | if (ret < 0) { |
| 328 | e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_RSL); |
| 329 | e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_OML); |
| 330 | bsc_unregister_fd(bfd); |
| 331 | close(bfd->fd); |
| 332 | bfd->fd = -1; |
| 333 | } |
| 334 | msgb_free(msg); |
| 335 | return ret; |
| 336 | } |
| 337 | /* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg() |
| 338 | * might have free'd it !!! */ |
| 339 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 340 | link = e1inp_lookup_sign_link(e1i_ts, 0, hh->proto); |
| 341 | if (!link) { |
| 342 | printf("no matching signalling link for hh->proto=0x%02x\n", hh->proto); |
| 343 | msgb_free(msg); |
| 344 | return -EIO; |
| 345 | } |
| 346 | msg->trx = link->trx; |
| 347 | |
| 348 | switch (hh->proto) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 349 | case IPAC_PROTO_RSL: |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 350 | if (!rsl_up) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 351 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, 0, IPAC_PROTO_RSL); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 352 | rsl_up = 1; |
| 353 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 354 | ret = abis_rsl_rcvmsg(msg); |
| 355 | break; |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 356 | case IPAC_PROTO_OML: |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 357 | if (!oml_up) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 358 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, 0, IPAC_PROTO_OML); |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 359 | oml_up = 1; |
| 360 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 361 | ret = abis_nm_rcvmsg(msg); |
| 362 | break; |
| 363 | default: |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 364 | DEBUGP(DMI, "Unknown IP.access protocol proto=0x%02x\n", hh->proto); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 365 | msgb_free(msg); |
| 366 | break; |
| 367 | } |
| 368 | return ret; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 371 | void ipaccess_prepend_header(struct msgb *msg, int proto) |
| 372 | { |
| 373 | struct ipaccess_head *hh; |
| 374 | |
| 375 | /* prepend the ip.access header */ |
| 376 | hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh)); |
| 377 | hh->zero = 0; |
| 378 | hh->len = msg->len - sizeof(*hh); |
| 379 | hh->proto = proto; |
| 380 | } |
| 381 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 382 | static int handle_ts1_write(struct bsc_fd *bfd) |
| 383 | { |
| 384 | struct e1inp_line *line = bfd->data; |
| 385 | unsigned int ts_nr = bfd->priv_nr; |
| 386 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 387 | struct e1inp_sign_link *sign_link; |
| 388 | struct msgb *msg; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 389 | u_int8_t proto; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 390 | int ret; |
| 391 | |
| 392 | /* get the next msg for this timeslot */ |
| 393 | msg = e1inp_tx_ts(e1i_ts, &sign_link); |
| 394 | if (!msg) { |
| 395 | bfd->when &= ~BSC_FD_WRITE; |
| 396 | return 0; |
| 397 | } |
| 398 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 399 | switch (sign_link->type) { |
| 400 | case E1INP_SIGN_OML: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 401 | proto = IPAC_PROTO_OML; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 402 | break; |
| 403 | case E1INP_SIGN_RSL: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 404 | proto = IPAC_PROTO_RSL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 405 | break; |
| 406 | default: |
| 407 | msgb_free(msg); |
| 408 | return -EINVAL; |
| 409 | } |
| 410 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 411 | |
| 412 | msg->l2h = msg->data; |
| 413 | ipaccess_prepend_header(msg, proto); |
| 414 | |
| 415 | DEBUGP(DMI, "TX %u: %s\n", ts_nr, hexdump(msg->l2h, msgb_l2len(msg))); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 416 | |
| 417 | ret = send(bfd->fd, msg->data, msg->len, 0); |
| 418 | msgb_free(msg); |
Harald Welte | 7a2a71e | 2009-05-01 21:54:11 +0000 | [diff] [blame] | 419 | usleep(100000); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 420 | |
| 421 | return ret; |
| 422 | } |
| 423 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 424 | /* callback from select.c in case one of the fd's can be read/written */ |
| 425 | static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 426 | { |
| 427 | struct e1inp_line *line = bfd->data; |
| 428 | unsigned int ts_nr = bfd->priv_nr; |
| 429 | unsigned int idx = ts_nr-1; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 430 | struct e1inp_ts *e1i_ts; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 431 | int rc = 0; |
| 432 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 433 | /* In case of early RSL we might not yet have a line */ |
| 434 | |
| 435 | if (line) |
| 436 | e1i_ts = &line->ts[idx]; |
| 437 | |
| 438 | if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 439 | if (what & BSC_FD_READ) |
| 440 | rc = handle_ts1_read(bfd); |
| 441 | if (what & BSC_FD_WRITE) |
| 442 | rc = handle_ts1_write(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 443 | } else |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 444 | fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 445 | |
| 446 | return rc; |
| 447 | } |
| 448 | |
| 449 | |
| 450 | static int ts_want_write(struct e1inp_ts *e1i_ts) |
| 451 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 452 | e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE; |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | struct e1inp_driver ipaccess_driver = { |
| 458 | .name = "ip.access", |
| 459 | .want_write = ts_want_write, |
| 460 | }; |
| 461 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 462 | /* callback of the OML listening filedescriptor */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 463 | static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 464 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 465 | int ret; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 466 | int idx = 0; |
| 467 | struct e1inp_line *line; |
| 468 | struct e1inp_ts *e1i_ts; |
| 469 | struct bsc_fd *bfd; |
| 470 | struct sockaddr_in sa; |
| 471 | socklen_t sa_len = sizeof(sa); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 472 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 473 | if (!(what & BSC_FD_READ)) |
| 474 | return 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 475 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 476 | ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 477 | if (ret < 0) { |
| 478 | perror("accept"); |
| 479 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 480 | } |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 481 | DEBUGP(DINP, "accept()ed new OML link from %s\n", inet_ntoa(sa.sin_addr)); |
| 482 | |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 483 | line = talloc(tall_bsc_ctx, struct e1inp_line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 484 | if (!line) { |
| 485 | close(ret); |
| 486 | return -ENOMEM; |
| 487 | } |
| 488 | memset(line, 0, sizeof(*line)); |
| 489 | line->driver = &ipaccess_driver; |
| 490 | //line->driver_data = e1h; |
| 491 | /* create virrtual E1 timeslots for signalling */ |
| 492 | e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); |
| 493 | e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_SIGN); |
| 494 | |
| 495 | e1i_ts = &line->ts[idx]; |
| 496 | |
| 497 | bfd = &e1i_ts->driver.ipaccess.fd; |
| 498 | bfd->fd = ret; |
| 499 | bfd->data = line; |
| 500 | bfd->priv_nr = 1; |
| 501 | bfd->cb = ipaccess_fd_cb; |
| 502 | bfd->when = BSC_FD_READ; |
| 503 | ret = bsc_register_fd(bfd); |
| 504 | if (ret < 0) { |
| 505 | fprintf(stderr, "could not register FD\n"); |
| 506 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 507 | talloc_free(line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 508 | return ret; |
| 509 | } |
| 510 | |
| 511 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
| 512 | ret = write(bfd->fd, id_req, sizeof(id_req)); |
| 513 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 514 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 515 | //return e1inp_line_register(line); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 516 | } |
| 517 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 518 | static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 519 | { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 520 | struct sockaddr_in sa; |
| 521 | socklen_t sa_len = sizeof(sa); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 522 | struct bsc_fd *bfd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 523 | int ret; |
| 524 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 525 | if (!(what & BSC_FD_READ)) |
| 526 | return 0; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 527 | |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 528 | bfd = talloc(tall_bsc_ctx, struct bsc_fd); |
| 529 | if (!bfd) |
| 530 | return -ENOMEM; |
| 531 | memset(bfd, 0, sizeof(*bfd)); |
| 532 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 533 | /* Some BTS has connected to us, but we don't know yet which line |
| 534 | * (as created by the OML link) to associate it with. Thus, we |
| 535 | * aloocate a temporary bfd until we have received ID from BTS */ |
| 536 | |
| 537 | bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 538 | if (bfd->fd < 0) { |
| 539 | perror("accept"); |
| 540 | return bfd->fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 541 | } |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 542 | DEBUGP(DINP, "accept()ed new RSL link from %s\n", inet_ntoa(sa.sin_addr)); |
| 543 | bfd->priv_nr = 2; |
| 544 | bfd->cb = ipaccess_fd_cb; |
| 545 | bfd->when = BSC_FD_READ; |
| 546 | ret = bsc_register_fd(bfd); |
| 547 | if (ret < 0) { |
| 548 | fprintf(stderr, "could not register FD\n"); |
| 549 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 550 | talloc_free(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 551 | return ret; |
| 552 | } |
| 553 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
| 554 | ret = write(bfd->fd, id_req, sizeof(id_req)); |
| 555 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int make_sock(struct bsc_fd *bfd, u_int16_t port, |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 560 | int (*cb)(struct bsc_fd *fd, unsigned int what)) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 561 | { |
| 562 | struct sockaddr_in addr; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 563 | int ret, on = 1; |
| 564 | |
| 565 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 566 | bfd->cb = cb; |
| 567 | bfd->when = BSC_FD_READ; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 568 | //bfd->data = line; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 569 | |
| 570 | memset(&addr, 0, sizeof(addr)); |
| 571 | addr.sin_family = AF_INET; |
| 572 | addr.sin_port = htons(port); |
| 573 | addr.sin_addr.s_addr = INADDR_ANY; |
| 574 | |
| 575 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 576 | |
| 577 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 578 | if (ret < 0) { |
| 579 | fprintf(stderr, "could not bind l2 socket %s\n", |
| 580 | strerror(errno)); |
| 581 | return -EIO; |
| 582 | } |
| 583 | |
| 584 | ret = listen(bfd->fd, 1); |
| 585 | if (ret < 0) { |
| 586 | perror("listen"); |
| 587 | return ret; |
| 588 | } |
| 589 | |
| 590 | ret = bsc_register_fd(bfd); |
| 591 | if (ret < 0) { |
| 592 | perror("register_listen_fd"); |
| 593 | return ret; |
| 594 | } |
| 595 | return 0; |
| 596 | } |
| 597 | |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 598 | /* Actively connect to a BTS. Currently used by ipaccess-config.c */ |
| 599 | int ipaccess_connect(struct e1inp_line *line, struct sockaddr_in *sa) |
| 600 | { |
| 601 | struct e1inp_ts *e1i_ts = &line->ts[0]; |
| 602 | struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd; |
| 603 | int ret, on = 1; |
| 604 | |
| 605 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 606 | bfd->cb = ipaccess_fd_cb; |
| 607 | bfd->when = BSC_FD_READ | BSC_FD_WRITE; |
| 608 | bfd->data = line; |
| 609 | bfd->priv_nr = 1; |
| 610 | |
| 611 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 612 | |
| 613 | ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa)); |
| 614 | if (ret < 0) { |
| 615 | fprintf(stderr, "could not connect socket\n"); |
| 616 | close(bfd->fd); |
| 617 | return ret; |
| 618 | } |
| 619 | |
| 620 | ret = bsc_register_fd(bfd); |
| 621 | if (ret < 0) { |
| 622 | close(bfd->fd); |
| 623 | return ret; |
| 624 | } |
| 625 | |
| 626 | line->driver = &ipaccess_driver; |
| 627 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 628 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 629 | //return e1inp_line_register(line); |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 630 | } |
| 631 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 632 | int ipaccess_setup(struct gsm_network *gsmnet) |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 633 | { |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 634 | int ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 635 | |
| 636 | /* register the driver with the core */ |
| 637 | /* FIXME: do this in the plugin initializer function */ |
| 638 | ret = e1inp_driver_register(&ipaccess_driver); |
| 639 | if (ret) |
| 640 | return ret; |
| 641 | |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 642 | e1h = talloc(tall_bsc_ctx, struct ia_e1_handle); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 643 | if (!e1h) |
| 644 | return -ENOMEM; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 645 | memset(e1h, 0, sizeof(*e1h)); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 646 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 647 | e1h->gsmnet = gsmnet; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 648 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 649 | /* Listen for OML connections */ |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 650 | ret = make_sock(&e1h->listen_fd, 3002, listen_fd_cb); |
Harald Welte | cf55978 | 2009-05-01 15:43:49 +0000 | [diff] [blame] | 651 | if (ret < 0) |
| 652 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 653 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 654 | /* Listen for RSL connections */ |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 655 | ret = make_sock(&e1h->rsl_listen_fd, 3003, rsl_listen_fd_cb); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 656 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 657 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 658 | } |