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> |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 4 | * (C) 2010 by Holger Hans Peter Freyther |
| 5 | * (C) 2010 by On-Waves |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [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 <time.h> |
| 31 | #include <sys/fcntl.h> |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/socket.h> |
| 34 | #include <sys/ioctl.h> |
| 35 | #include <arpa/inet.h> |
| 36 | |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 37 | #include <osmocore/select.h> |
| 38 | #include <osmocore/tlv.h> |
| 39 | #include <osmocore/msgb.h> |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 40 | #include <openbsc/debug.h> |
| 41 | #include <openbsc/gsm_data.h> |
| 42 | #include <openbsc/abis_nm.h> |
| 43 | #include <openbsc/abis_rsl.h> |
| 44 | #include <openbsc/subchan_demux.h> |
| 45 | #include <openbsc/e1_input.h> |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 46 | #include <openbsc/ipaccess.h> |
Harald Welte | 5540c4c | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 47 | #include <openbsc/socket.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 48 | #include <osmocore/talloc.h> |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 49 | |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 50 | #define PRIV_OML 1 |
| 51 | #define PRIV_RSL 2 |
| 52 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 53 | /* data structure for one E1 interface with A-bis */ |
| 54 | struct ia_e1_handle { |
| 55 | struct bsc_fd listen_fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 56 | struct bsc_fd rsl_listen_fd; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 57 | struct gsm_network *gsmnet; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 58 | }; |
| 59 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 60 | static struct ia_e1_handle *e1h; |
| 61 | |
| 62 | |
Holger Hans Peter Freyther | 6c8c0dd | 2010-04-04 18:12:37 +0200 | [diff] [blame] | 63 | #define TS1_ALLOC_SIZE 900 |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 64 | |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 65 | static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG }; |
| 66 | 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] | 67 | static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET, |
Holger Hans Peter Freyther | acf8a0c | 2010-03-29 08:47:44 +0200 | [diff] [blame] | 68 | 0x01, IPAC_IDTAG_UNIT, |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 69 | 0x01, IPAC_IDTAG_MACADDR, |
| 70 | 0x01, IPAC_IDTAG_LOCATION1, |
| 71 | 0x01, IPAC_IDTAG_LOCATION2, |
| 72 | 0x01, IPAC_IDTAG_EQUIPVERS, |
| 73 | 0x01, IPAC_IDTAG_SWVERSION, |
| 74 | 0x01, IPAC_IDTAG_UNITNAME, |
| 75 | 0x01, IPAC_IDTAG_SERNR, |
| 76 | }; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 77 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 78 | static const char *idtag_names[] = { |
| 79 | [IPAC_IDTAG_SERNR] = "Serial_Number", |
| 80 | [IPAC_IDTAG_UNITNAME] = "Unit_Name", |
| 81 | [IPAC_IDTAG_LOCATION1] = "Location_1", |
| 82 | [IPAC_IDTAG_LOCATION2] = "Location_2", |
| 83 | [IPAC_IDTAG_EQUIPVERS] = "Equipment_Version", |
| 84 | [IPAC_IDTAG_SWVERSION] = "Software_Version", |
| 85 | [IPAC_IDTAG_IPADDR] = "IP_Address", |
| 86 | [IPAC_IDTAG_MACADDR] = "MAC_Address", |
| 87 | [IPAC_IDTAG_UNIT] = "Unit_ID", |
| 88 | }; |
| 89 | |
| 90 | static const char *ipac_idtag_name(int tag) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 91 | { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 92 | if (tag >= ARRAY_SIZE(idtag_names)) |
| 93 | return "unknown"; |
| 94 | |
| 95 | return idtag_names[tag]; |
| 96 | } |
| 97 | |
Holger Hans Peter Freyther | d3d5be1 | 2010-02-09 14:37:23 +0100 | [diff] [blame] | 98 | int ipaccess_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len) |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 99 | { |
| 100 | u_int8_t t_len; |
| 101 | u_int8_t t_tag; |
| 102 | u_int8_t *cur = buf; |
| 103 | |
Holger Hans Peter Freyther | 949e0ba | 2010-10-14 17:21:04 +0200 | [diff] [blame] | 104 | memset(dec, 0, sizeof(*dec)); |
| 105 | |
Holger Hans Peter Freyther | d9e81d0 | 2010-10-14 20:42:45 +0200 | [diff] [blame] | 106 | while (len >= 2) { |
| 107 | len -= 2; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 108 | t_len = *cur++; |
| 109 | t_tag = *cur++; |
| 110 | |
Holger Hans Peter Freyther | d9e81d0 | 2010-10-14 20:42:45 +0200 | [diff] [blame] | 111 | if (t_len > len + 1) { |
| 112 | LOGP(DMI, LOGL_ERROR, "The tag does not fit: %d\n", t_len); |
| 113 | return -1; |
| 114 | } |
| 115 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 116 | DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur); |
| 117 | |
| 118 | dec->lv[t_tag].len = t_len; |
| 119 | dec->lv[t_tag].val = cur; |
| 120 | |
| 121 | cur += t_len; |
Holger Hans Peter Freyther | d9e81d0 | 2010-10-14 20:42:45 +0200 | [diff] [blame] | 122 | len -= t_len; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 123 | } |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | struct gsm_bts *find_bts_by_unitid(struct gsm_network *net, |
| 128 | u_int16_t site_id, u_int16_t bts_id) |
| 129 | { |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 130 | struct gsm_bts *bts; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 131 | |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 132 | llist_for_each_entry(bts, &net->bts_list, list) { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 133 | |
| 134 | if (!is_ipaccess_bts(bts)) |
| 135 | continue; |
| 136 | |
| 137 | if (bts->ip_access.site_id == site_id && |
| 138 | bts->ip_access.bts_id == bts_id) |
| 139 | return bts; |
| 140 | } |
| 141 | |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id, |
| 146 | u_int16_t *trx_id) |
| 147 | { |
| 148 | unsigned long ul; |
| 149 | char *endptr; |
| 150 | const char *nptr; |
| 151 | |
| 152 | nptr = str; |
| 153 | ul = strtoul(nptr, &endptr, 10); |
| 154 | if (endptr <= nptr) |
| 155 | return -EINVAL; |
| 156 | if (site_id) |
| 157 | *site_id = ul & 0xffff; |
| 158 | |
| 159 | if (*endptr++ != '/') |
| 160 | return -EINVAL; |
| 161 | |
| 162 | nptr = endptr; |
| 163 | ul = strtoul(nptr, &endptr, 10); |
| 164 | if (endptr <= nptr) |
| 165 | return -EINVAL; |
| 166 | if (bts_id) |
| 167 | *bts_id = ul & 0xffff; |
| 168 | |
| 169 | if (*endptr++ != '/') |
| 170 | return -EINVAL; |
| 171 | |
| 172 | nptr = endptr; |
| 173 | ul = strtoul(nptr, &endptr, 10); |
| 174 | if (endptr <= nptr) |
| 175 | return -EINVAL; |
| 176 | if (trx_id) |
| 177 | *trx_id = ul & 0xffff; |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
Holger Hans Peter Freyther | 301e628 | 2010-01-13 09:06:46 +0100 | [diff] [blame] | 182 | /* send the id ack */ |
| 183 | int ipaccess_send_id_ack(int fd) |
| 184 | { |
| 185 | return write(fd, id_ack, sizeof(id_ack)); |
| 186 | } |
| 187 | |
Holger Hans Peter Freyther | 3bc856b | 2010-02-07 12:04:07 +0100 | [diff] [blame] | 188 | int ipaccess_send_id_req(int fd) |
| 189 | { |
| 190 | return write(fd, id_req, sizeof(id_req)); |
| 191 | } |
| 192 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 193 | /* base handling of the ip.access protocol */ |
| 194 | int ipaccess_rcvmsg_base(struct msgb *msg, |
| 195 | struct bsc_fd *bfd) |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 196 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 197 | u_int8_t msg_type = *(msg->l2h); |
Holger Freyther | ff9592f | 2009-03-09 16:17:14 +0000 | [diff] [blame] | 198 | int ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 199 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 200 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 201 | case IPAC_MSGT_PING: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 202 | ret = write(bfd->fd, pong, sizeof(pong)); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 203 | break; |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 204 | case IPAC_MSGT_PONG: |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 205 | DEBUGP(DMI, "PONG!\n"); |
| 206 | break; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 207 | case IPAC_MSGT_ID_ACK: |
| 208 | DEBUGP(DMI, "ID_ACK? -> ACK!\n"); |
Holger Hans Peter Freyther | 301e628 | 2010-01-13 09:06:46 +0100 | [diff] [blame] | 209 | ret = ipaccess_send_id_ack(bfd->fd); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 210 | break; |
| 211 | } |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg, |
| 216 | struct bsc_fd *bfd) |
| 217 | { |
| 218 | struct tlv_parsed tlvp; |
| 219 | u_int8_t msg_type = *(msg->l2h); |
| 220 | u_int16_t site_id = 0, bts_id = 0, trx_id = 0; |
| 221 | struct gsm_bts *bts; |
Holger Hans Peter Freyther | e383980 | 2010-10-14 21:17:30 +0200 | [diff] [blame] | 222 | char *unitid; |
| 223 | int len; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 224 | |
| 225 | /* handle base messages */ |
| 226 | ipaccess_rcvmsg_base(msg, bfd); |
| 227 | |
| 228 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 229 | case IPAC_MSGT_ID_RESP: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 230 | DEBUGP(DMI, "ID_RESP "); |
| 231 | /* parse tags, search for Unit ID */ |
Holger Hans Peter Freyther | d3d5be1 | 2010-02-09 14:37:23 +0100 | [diff] [blame] | 232 | ipaccess_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2, |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 233 | msgb_l2len(msg)-2); |
| 234 | DEBUGP(DMI, "\n"); |
| 235 | |
| 236 | if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) |
| 237 | break; |
| 238 | |
Holger Hans Peter Freyther | e383980 | 2010-10-14 21:17:30 +0200 | [diff] [blame] | 239 | len = TLVP_LEN(&tlvp, IPAC_IDTAG_UNIT); |
| 240 | if (len < 1) |
| 241 | break; |
| 242 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 243 | /* lookup BTS, create sign_link, ... */ |
Holger Hans Peter Freyther | e383980 | 2010-10-14 21:17:30 +0200 | [diff] [blame] | 244 | unitid = (char *) TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT); |
| 245 | unitid[len - 1] = '\0'; |
| 246 | parse_unitid(unitid, &site_id, &bts_id, &trx_id); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 247 | bts = find_bts_by_unitid(e1h->gsmnet, site_id, bts_id); |
| 248 | if (!bts) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 249 | LOGP(DINP, LOGL_ERROR, "Unable to find BTS configuration for " |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 250 | " %u/%u/%u, disconnecting\n", site_id, bts_id, |
| 251 | trx_id); |
| 252 | return -EIO; |
| 253 | } |
| 254 | DEBUGP(DINP, "Identified BTS %u/%u/%u\n", site_id, bts_id, trx_id); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 255 | if (bfd->priv_nr == PRIV_OML) { |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 256 | /* drop any old oml connection */ |
| 257 | ipaccess_drop_oml(bts); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 258 | bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1], |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 259 | E1INP_SIGN_OML, bts->c0, |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 260 | bts->oml_tei, 0); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 261 | } else if (bfd->priv_nr == PRIV_RSL) { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 262 | struct e1inp_ts *e1i_ts; |
| 263 | struct bsc_fd *newbfd; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 264 | struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, trx_id); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 265 | |
| 266 | /* drop any old rsl connection */ |
| 267 | ipaccess_drop_rsl(trx); |
| 268 | |
| 269 | if (!bts->oml_link) { |
| 270 | bsc_unregister_fd(bfd); |
| 271 | close(bfd->fd); |
| 272 | bfd->fd = -1; |
| 273 | talloc_free(bfd); |
| 274 | return 0; |
| 275 | } |
| 276 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 277 | bfd->data = line = bts->oml_link->ts->line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 278 | e1i_ts = &line->ts[PRIV_RSL + trx_id - 1]; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 279 | newbfd = &e1i_ts->driver.ipaccess.fd; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 280 | e1inp_ts_config(e1i_ts, line, E1INP_TS_TYPE_SIGN); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 281 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 282 | trx->rsl_link = e1inp_sign_link_create(e1i_ts, |
| 283 | E1INP_SIGN_RSL, trx, |
| 284 | trx->rsl_tei, 0); |
Holger Hans Peter Freyther | d49fc5a | 2010-11-15 20:36:21 +0100 | [diff] [blame] | 285 | trx->rsl_link->ts->sign.delay = 0; |
Holger Hans Peter Freyther | 354ef81 | 2010-03-24 04:02:55 +0100 | [diff] [blame] | 286 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 287 | /* get rid of our old temporary bfd */ |
| 288 | memcpy(newbfd, bfd, sizeof(*newbfd)); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 289 | newbfd->priv_nr = PRIV_RSL + trx_id; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 290 | bsc_unregister_fd(bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 291 | bfd->fd = -1; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 292 | talloc_free(bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 293 | bsc_register_fd(newbfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 294 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 295 | break; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 296 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 297 | return 0; |
| 298 | } |
| 299 | |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 300 | #define OML_UP 0x0001 |
| 301 | #define RSL_UP 0x0002 |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 302 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 303 | /* |
| 304 | * read one ipa message from the socket |
| 305 | * return NULL in case of error |
| 306 | */ |
| 307 | struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 308 | { |
Harald Welte | 966636f | 2009-06-26 19:39:35 +0200 | [diff] [blame] | 309 | struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "Abis/IP"); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 310 | struct ipaccess_head *hh; |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 311 | int len, ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 312 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 313 | if (!msg) { |
| 314 | *error = -ENOMEM; |
| 315 | return NULL; |
| 316 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 317 | |
| 318 | /* first read our 3-byte header */ |
| 319 | hh = (struct ipaccess_head *) msg->data; |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 320 | ret = recv(bfd->fd, msg->data, sizeof(*hh), 0); |
| 321 | if (ret == 0) { |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 322 | msgb_free(msg); |
| 323 | *error = ret; |
| 324 | return NULL; |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 325 | } else if (ret != sizeof(*hh)) { |
| 326 | if (errno != EAGAIN) |
| 327 | LOGP(DINP, LOGL_ERROR, "recv error %d %s\n", ret, strerror(errno)); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 328 | msgb_free(msg); |
| 329 | *error = ret; |
| 330 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 331 | } |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 332 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 333 | msgb_put(msg, ret); |
| 334 | |
| 335 | /* then read te length as specified in header */ |
| 336 | msg->l2h = msg->data + sizeof(*hh); |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 337 | len = ntohs(hh->len); |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 338 | |
| 339 | if (len < 0 || TS1_ALLOC_SIZE < len + sizeof(*hh)) { |
| 340 | LOGP(DINP, LOGL_ERROR, "Can not read this packet. %d avail\n", len); |
| 341 | msgb_free(msg); |
| 342 | *error = -EIO; |
| 343 | return NULL; |
| 344 | } |
| 345 | |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 346 | ret = recv(bfd->fd, msg->l2h, len, 0); |
| 347 | if (ret < len) { |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 348 | LOGP(DINP, LOGL_ERROR, "short read! Got %d from %d\n", ret, len); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 349 | msgb_free(msg); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 350 | *error = -EIO; |
| 351 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 352 | } |
| 353 | msgb_put(msg, ret); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 354 | |
| 355 | return msg; |
| 356 | } |
| 357 | |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 358 | int ipaccess_drop_oml(struct gsm_bts *bts) |
| 359 | { |
| 360 | struct gsm_bts_trx *trx; |
| 361 | struct e1inp_ts *ts; |
| 362 | struct e1inp_line *line; |
| 363 | struct bsc_fd *bfd; |
| 364 | |
| 365 | if (!bts || !bts->oml_link) |
| 366 | return -1; |
| 367 | |
| 368 | /* send OML down */ |
| 369 | ts = bts->oml_link->ts; |
| 370 | line = ts->line; |
Holger Hans Peter Freyther | f8eff2e | 2010-04-11 18:54:58 +0200 | [diff] [blame] | 371 | e1inp_event(ts, EVT_E1_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 372 | |
| 373 | bfd = &ts->driver.ipaccess.fd; |
| 374 | bsc_unregister_fd(bfd); |
| 375 | close(bfd->fd); |
| 376 | bfd->fd = -1; |
| 377 | |
| 378 | /* clean up OML and RSL */ |
| 379 | e1inp_sign_link_destroy(bts->oml_link); |
| 380 | bts->oml_link = NULL; |
| 381 | bts->ip_access.flags = 0; |
| 382 | |
| 383 | /* drop all RSL connections too */ |
| 384 | llist_for_each_entry(trx, &bts->trx_list, list) |
| 385 | ipaccess_drop_rsl(trx); |
| 386 | |
| 387 | /* kill the E1 line now... as we have no one left to use it */ |
| 388 | talloc_free(line); |
| 389 | |
| 390 | return -1; |
| 391 | } |
| 392 | |
| 393 | static int ipaccess_drop(struct e1inp_ts *ts, struct bsc_fd *bfd) |
| 394 | { |
| 395 | struct e1inp_sign_link *link; |
| 396 | int bts_nr; |
| 397 | |
| 398 | if (!ts) { |
| 399 | /* |
| 400 | * If we don't have a TS this means that this is a RSL |
| 401 | * connection but we are not past the authentication |
| 402 | * handling yet. So we can safely delete this bfd and |
| 403 | * wait for a reconnect. |
| 404 | */ |
| 405 | bsc_unregister_fd(bfd); |
| 406 | close(bfd->fd); |
| 407 | bfd->fd = -1; |
| 408 | talloc_free(bfd); |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | /* attempt to find a signalling link */ |
| 413 | if (ts->type == E1INP_TS_TYPE_SIGN) { |
| 414 | llist_for_each_entry(link, &ts->sign.sign_links, list) { |
| 415 | bts_nr = link->trx->bts->bts_nr; |
| 416 | /* we have issues just reconnecting RLS so we drop OML */ |
| 417 | ipaccess_drop_oml(link->trx->bts); |
| 418 | return bts_nr; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | /* error case */ |
| 423 | LOGP(DINP, LOGL_ERROR, "Failed to find a signalling link for ts: %p\n", ts); |
| 424 | bsc_unregister_fd(bfd); |
| 425 | close(bfd->fd); |
| 426 | bfd->fd = -1; |
| 427 | return -1; |
| 428 | } |
| 429 | |
| 430 | int ipaccess_drop_rsl(struct gsm_bts_trx *trx) |
| 431 | { |
| 432 | struct bsc_fd *bfd; |
| 433 | struct e1inp_ts *ts; |
| 434 | |
| 435 | if (!trx || !trx->rsl_link) |
| 436 | return -1; |
| 437 | |
| 438 | /* send RSL down */ |
| 439 | ts = trx->rsl_link->ts; |
Holger Hans Peter Freyther | f8eff2e | 2010-04-11 18:54:58 +0200 | [diff] [blame] | 440 | e1inp_event(ts, EVT_E1_TEI_DN, trx->rsl_link->tei, trx->rsl_link->sapi); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 441 | |
| 442 | /* close the socket */ |
| 443 | bfd = &ts->driver.ipaccess.fd; |
| 444 | bsc_unregister_fd(bfd); |
| 445 | close(bfd->fd); |
| 446 | bfd->fd = -1; |
| 447 | |
| 448 | /* destroy */ |
| 449 | e1inp_sign_link_destroy(trx->rsl_link); |
| 450 | trx->rsl_link = NULL; |
| 451 | |
| 452 | return -1; |
| 453 | } |
| 454 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 455 | static int handle_ts1_read(struct bsc_fd *bfd) |
| 456 | { |
| 457 | struct e1inp_line *line = bfd->data; |
| 458 | unsigned int ts_nr = bfd->priv_nr; |
| 459 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 460 | struct e1inp_sign_link *link; |
| 461 | struct msgb *msg; |
| 462 | struct ipaccess_head *hh; |
Holger Hans Peter Freyther | 67b5961 | 2009-10-27 10:08:38 +0100 | [diff] [blame] | 463 | int ret = 0, error; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 464 | |
| 465 | msg = ipaccess_read_msg(bfd, &error); |
| 466 | if (!msg) { |
| 467 | if (error == 0) { |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 468 | int ret = ipaccess_drop(e1i_ts, bfd); |
| 469 | if (ret >= 0) |
Harald Welte (local) | 7971d3d | 2009-12-28 17:52:11 +0100 | [diff] [blame] | 470 | LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n", |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 471 | ret); |
| 472 | else |
Harald Welte (local) | 7971d3d | 2009-12-28 17:52:11 +0100 | [diff] [blame] | 473 | LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n"); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 474 | } |
| 475 | return error; |
| 476 | } |
| 477 | |
Sylvain Munaut | 86538c7 | 2009-09-30 22:35:04 +0200 | [diff] [blame] | 478 | 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] | 479 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 480 | hh = (struct ipaccess_head *) msg->data; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 481 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 482 | ret = ipaccess_rcvmsg(line, msg, bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 483 | if (ret < 0) |
| 484 | ipaccess_drop(e1i_ts, bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 485 | msgb_free(msg); |
| 486 | return ret; |
| 487 | } |
| 488 | /* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg() |
| 489 | * might have free'd it !!! */ |
| 490 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 491 | link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 492 | if (!link) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 493 | LOGP(DINP, LOGL_ERROR, "no matching signalling link for " |
| 494 | "hh->proto=0x%02x\n", hh->proto); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 495 | msgb_free(msg); |
| 496 | return -EIO; |
| 497 | } |
| 498 | msg->trx = link->trx; |
| 499 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 500 | switch (link->type) { |
| 501 | case E1INP_SIGN_RSL: |
Harald Welte | 1394fea | 2009-12-21 23:01:33 +0100 | [diff] [blame] | 502 | if (!(msg->trx->bts->ip_access.flags & (RSL_UP << msg->trx->nr))) { |
Harald Welte | e73501a | 2009-10-21 21:16:00 +0200 | [diff] [blame] | 503 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, link->tei, link->sapi); |
Harald Welte | 1394fea | 2009-12-21 23:01:33 +0100 | [diff] [blame] | 504 | msg->trx->bts->ip_access.flags |= (RSL_UP << msg->trx->nr); |
Harald Welte | e73501a | 2009-10-21 21:16:00 +0200 | [diff] [blame] | 505 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 506 | ret = abis_rsl_rcvmsg(msg); |
| 507 | break; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 508 | case E1INP_SIGN_OML: |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 509 | if (!(msg->trx->bts->ip_access.flags & OML_UP)) { |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 510 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, link->tei, link->sapi); |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 511 | msg->trx->bts->ip_access.flags |= OML_UP; |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 512 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 513 | ret = abis_nm_rcvmsg(msg); |
| 514 | break; |
| 515 | default: |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 516 | LOGP(DINP, LOGL_NOTICE, "Unknown IP.access protocol proto=0x%02x\n", hh->proto); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 517 | msgb_free(msg); |
| 518 | break; |
| 519 | } |
| 520 | return ret; |
| 521 | } |
| 522 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 523 | void ipaccess_prepend_header(struct msgb *msg, int proto) |
| 524 | { |
| 525 | struct ipaccess_head *hh; |
| 526 | |
| 527 | /* prepend the ip.access header */ |
| 528 | hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh)); |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 529 | hh->len = htons(msg->len - sizeof(*hh)); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 530 | hh->proto = proto; |
| 531 | } |
| 532 | |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 533 | static int ts_want_write(struct e1inp_ts *e1i_ts) |
| 534 | { |
| 535 | e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE; |
| 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | static void timeout_ts1_write(void *data) |
| 541 | { |
| 542 | struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; |
| 543 | |
| 544 | /* trigger write of ts1, due to tx delay timer */ |
| 545 | ts_want_write(e1i_ts); |
| 546 | } |
| 547 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 548 | static int handle_ts1_write(struct bsc_fd *bfd) |
| 549 | { |
| 550 | struct e1inp_line *line = bfd->data; |
| 551 | unsigned int ts_nr = bfd->priv_nr; |
| 552 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 553 | struct e1inp_sign_link *sign_link; |
| 554 | struct msgb *msg; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 555 | u_int8_t proto; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 556 | int ret; |
| 557 | |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 558 | bfd->when &= ~BSC_FD_WRITE; |
| 559 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 560 | /* get the next msg for this timeslot */ |
| 561 | msg = e1inp_tx_ts(e1i_ts, &sign_link); |
| 562 | if (!msg) { |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 563 | /* no message after tx delay timer */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 564 | return 0; |
| 565 | } |
| 566 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 567 | switch (sign_link->type) { |
| 568 | case E1INP_SIGN_OML: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 569 | proto = IPAC_PROTO_OML; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 570 | break; |
| 571 | case E1INP_SIGN_RSL: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 572 | proto = IPAC_PROTO_RSL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 573 | break; |
| 574 | default: |
| 575 | msgb_free(msg); |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 576 | bfd->when |= BSC_FD_WRITE; /* come back for more msg */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 577 | return -EINVAL; |
| 578 | } |
| 579 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 580 | msg->l2h = msg->data; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 581 | ipaccess_prepend_header(msg, sign_link->tei); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 582 | |
| 583 | 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] | 584 | |
| 585 | ret = send(bfd->fd, msg->data, msg->len, 0); |
| 586 | msgb_free(msg); |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 587 | |
| 588 | /* set tx delay timer for next event */ |
| 589 | e1i_ts->sign.tx_timer.cb = timeout_ts1_write; |
| 590 | e1i_ts->sign.tx_timer.data = e1i_ts; |
Holger Hans Peter Freyther | 63cb447 | 2010-04-11 10:10:04 +0200 | [diff] [blame] | 591 | |
| 592 | /* Reducing this might break the nanoBTS 900 init. */ |
Holger Hans Peter Freyther | d85642a | 2010-04-26 16:02:04 +0800 | [diff] [blame] | 593 | bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 594 | |
| 595 | return ret; |
| 596 | } |
| 597 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 598 | /* callback from select.c in case one of the fd's can be read/written */ |
| 599 | static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 600 | { |
| 601 | struct e1inp_line *line = bfd->data; |
| 602 | unsigned int ts_nr = bfd->priv_nr; |
| 603 | unsigned int idx = ts_nr-1; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 604 | struct e1inp_ts *e1i_ts; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 605 | int rc = 0; |
| 606 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 607 | /* In case of early RSL we might not yet have a line */ |
| 608 | |
| 609 | if (line) |
| 610 | e1i_ts = &line->ts[idx]; |
| 611 | |
| 612 | if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 613 | if (what & BSC_FD_READ) |
| 614 | rc = handle_ts1_read(bfd); |
| 615 | if (what & BSC_FD_WRITE) |
| 616 | rc = handle_ts1_write(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 617 | } else |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 618 | LOGP(DINP, LOGL_ERROR, "unknown E1 TS type %u\n", e1i_ts->type); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 619 | |
| 620 | return rc; |
| 621 | } |
| 622 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 623 | struct e1inp_driver ipaccess_driver = { |
| 624 | .name = "ip.access", |
| 625 | .want_write = ts_want_write, |
Holger Hans Peter Freyther | d49fc5a | 2010-11-15 20:36:21 +0100 | [diff] [blame] | 626 | .default_delay = 0, |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 627 | }; |
| 628 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 629 | /* callback of the OML listening filedescriptor */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 630 | static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 631 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 632 | int ret; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 633 | int idx = 0; |
Holger Hans Peter Freyther | edee794 | 2010-03-24 11:20:27 +0100 | [diff] [blame] | 634 | int i; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 635 | struct e1inp_line *line; |
| 636 | struct e1inp_ts *e1i_ts; |
| 637 | struct bsc_fd *bfd; |
| 638 | struct sockaddr_in sa; |
| 639 | socklen_t sa_len = sizeof(sa); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 640 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 641 | if (!(what & BSC_FD_READ)) |
| 642 | return 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 643 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 644 | ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 645 | if (ret < 0) { |
| 646 | perror("accept"); |
| 647 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 648 | } |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 649 | LOGP(DINP, LOGL_NOTICE, "accept()ed new OML link from %s\n", |
| 650 | inet_ntoa(sa.sin_addr)); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 651 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 652 | line = talloc_zero(tall_bsc_ctx, struct e1inp_line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 653 | if (!line) { |
| 654 | close(ret); |
| 655 | return -ENOMEM; |
| 656 | } |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 657 | line->driver = &ipaccess_driver; |
| 658 | //line->driver_data = e1h; |
| 659 | /* create virrtual E1 timeslots for signalling */ |
| 660 | e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 661 | |
Holger Hans Peter Freyther | edee794 | 2010-03-24 11:20:27 +0100 | [diff] [blame] | 662 | /* initialize the fds */ |
| 663 | for (i = 0; i < ARRAY_SIZE(line->ts); ++i) |
| 664 | line->ts[i].driver.ipaccess.fd.fd = -1; |
| 665 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 666 | e1i_ts = &line->ts[idx]; |
| 667 | |
| 668 | bfd = &e1i_ts->driver.ipaccess.fd; |
| 669 | bfd->fd = ret; |
| 670 | bfd->data = line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 671 | bfd->priv_nr = PRIV_OML; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 672 | bfd->cb = ipaccess_fd_cb; |
| 673 | bfd->when = BSC_FD_READ; |
| 674 | ret = bsc_register_fd(bfd); |
| 675 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 676 | LOGP(DINP, LOGL_ERROR, "could not register FD\n"); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 677 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 678 | talloc_free(line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 679 | return ret; |
| 680 | } |
| 681 | |
| 682 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
Holger Hans Peter Freyther | 3bc856b | 2010-02-07 12:04:07 +0100 | [diff] [blame] | 683 | ret = ipaccess_send_id_req(bfd->fd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 684 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 685 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 686 | //return e1inp_line_register(line); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 687 | } |
| 688 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 689 | static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 690 | { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 691 | struct sockaddr_in sa; |
| 692 | socklen_t sa_len = sizeof(sa); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 693 | struct bsc_fd *bfd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 694 | int ret; |
| 695 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 696 | if (!(what & BSC_FD_READ)) |
| 697 | return 0; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 698 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 699 | bfd = talloc_zero(tall_bsc_ctx, struct bsc_fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 700 | if (!bfd) |
| 701 | return -ENOMEM; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 702 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 703 | /* Some BTS has connected to us, but we don't know yet which line |
| 704 | * (as created by the OML link) to associate it with. Thus, we |
Holger Hans Peter Freyther | c7df7c6 | 2009-11-15 13:50:39 +0100 | [diff] [blame] | 705 | * allocate a temporary bfd until we have received ID from BTS */ |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 706 | |
| 707 | bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 708 | if (bfd->fd < 0) { |
| 709 | perror("accept"); |
| 710 | return bfd->fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 711 | } |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 712 | LOGP(DINP, LOGL_NOTICE, "accept()ed new RSL link from %s\n", inet_ntoa(sa.sin_addr)); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 713 | bfd->priv_nr = PRIV_RSL; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 714 | bfd->cb = ipaccess_fd_cb; |
| 715 | bfd->when = BSC_FD_READ; |
| 716 | ret = bsc_register_fd(bfd); |
| 717 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 718 | LOGP(DINP, LOGL_ERROR, "could not register FD\n"); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 719 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 720 | talloc_free(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 721 | return ret; |
| 722 | } |
| 723 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
| 724 | ret = write(bfd->fd, id_req, sizeof(id_req)); |
| 725 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 726 | return 0; |
| 727 | } |
| 728 | |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 729 | /* Actively connect to a BTS. Currently used by ipaccess-config.c */ |
| 730 | int ipaccess_connect(struct e1inp_line *line, struct sockaddr_in *sa) |
| 731 | { |
| 732 | struct e1inp_ts *e1i_ts = &line->ts[0]; |
| 733 | struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd; |
| 734 | int ret, on = 1; |
| 735 | |
| 736 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 737 | bfd->cb = ipaccess_fd_cb; |
| 738 | bfd->when = BSC_FD_READ | BSC_FD_WRITE; |
| 739 | bfd->data = line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 740 | bfd->priv_nr = PRIV_OML; |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 741 | |
Holger Hans Peter Freyther | 4d2d95b | 2010-02-19 13:07:05 +0100 | [diff] [blame] | 742 | if (bfd->fd < 0) { |
| 743 | LOGP(DINP, LOGL_ERROR, "could not create TCP socket.\n"); |
| 744 | return -EIO; |
| 745 | } |
| 746 | |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 747 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 748 | |
| 749 | ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa)); |
| 750 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 751 | LOGP(DINP, LOGL_ERROR, "could not connect socket\n"); |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 752 | close(bfd->fd); |
| 753 | return ret; |
| 754 | } |
| 755 | |
| 756 | ret = bsc_register_fd(bfd); |
| 757 | if (ret < 0) { |
| 758 | close(bfd->fd); |
| 759 | return ret; |
| 760 | } |
| 761 | |
| 762 | line->driver = &ipaccess_driver; |
| 763 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 764 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 765 | //return e1inp_line_register(line); |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 766 | } |
| 767 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 768 | int ipaccess_setup(struct gsm_network *gsmnet) |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 769 | { |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 770 | int ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 771 | |
| 772 | /* register the driver with the core */ |
| 773 | /* FIXME: do this in the plugin initializer function */ |
| 774 | ret = e1inp_driver_register(&ipaccess_driver); |
| 775 | if (ret) |
| 776 | return ret; |
| 777 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 778 | e1h = talloc_zero(tall_bsc_ctx, struct ia_e1_handle); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 779 | if (!e1h) |
| 780 | return -ENOMEM; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 781 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 782 | e1h->gsmnet = gsmnet; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 783 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 784 | /* Listen for OML connections */ |
Harald Welte | 5540c4c | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 785 | ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, 0, IPA_TCP_PORT_OML, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 786 | listen_fd_cb); |
Harald Welte | cf55978 | 2009-05-01 15:43:49 +0000 | [diff] [blame] | 787 | if (ret < 0) |
| 788 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 789 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 790 | /* Listen for RSL connections */ |
Harald Welte | 5540c4c | 2010-05-19 14:38:50 +0200 | [diff] [blame] | 791 | ret = make_sock(&e1h->rsl_listen_fd, IPPROTO_TCP, 0, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 792 | IPA_TCP_PORT_RSL, rsl_listen_fd_cb); |
| 793 | if (ret < 0) |
| 794 | return ret; |
| 795 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 796 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 797 | } |