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 | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 47 | #include <osmocore/talloc.h> |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 48 | |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 49 | #define PRIV_OML 1 |
| 50 | #define PRIV_RSL 2 |
| 51 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 52 | /* data structure for one E1 interface with A-bis */ |
| 53 | struct ia_e1_handle { |
| 54 | struct bsc_fd listen_fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 55 | struct bsc_fd rsl_listen_fd; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 56 | struct bsc_fd gprs_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 | |
| 104 | while (cur < buf + len) { |
| 105 | t_len = *cur++; |
| 106 | t_tag = *cur++; |
| 107 | |
| 108 | DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur); |
| 109 | |
| 110 | dec->lv[t_tag].len = t_len; |
| 111 | dec->lv[t_tag].val = cur; |
| 112 | |
| 113 | cur += t_len; |
| 114 | } |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | struct gsm_bts *find_bts_by_unitid(struct gsm_network *net, |
| 119 | u_int16_t site_id, u_int16_t bts_id) |
| 120 | { |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 121 | struct gsm_bts *bts; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 122 | |
Harald Welte | e441d9c | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 123 | llist_for_each_entry(bts, &net->bts_list, list) { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 124 | |
| 125 | if (!is_ipaccess_bts(bts)) |
| 126 | continue; |
| 127 | |
| 128 | if (bts->ip_access.site_id == site_id && |
| 129 | bts->ip_access.bts_id == bts_id) |
| 130 | return bts; |
| 131 | } |
| 132 | |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id, |
| 137 | u_int16_t *trx_id) |
| 138 | { |
| 139 | unsigned long ul; |
| 140 | char *endptr; |
| 141 | const char *nptr; |
| 142 | |
| 143 | nptr = str; |
| 144 | ul = strtoul(nptr, &endptr, 10); |
| 145 | if (endptr <= nptr) |
| 146 | return -EINVAL; |
| 147 | if (site_id) |
| 148 | *site_id = ul & 0xffff; |
| 149 | |
| 150 | if (*endptr++ != '/') |
| 151 | return -EINVAL; |
| 152 | |
| 153 | nptr = endptr; |
| 154 | ul = strtoul(nptr, &endptr, 10); |
| 155 | if (endptr <= nptr) |
| 156 | return -EINVAL; |
| 157 | if (bts_id) |
| 158 | *bts_id = ul & 0xffff; |
| 159 | |
| 160 | if (*endptr++ != '/') |
| 161 | return -EINVAL; |
| 162 | |
| 163 | nptr = endptr; |
| 164 | ul = strtoul(nptr, &endptr, 10); |
| 165 | if (endptr <= nptr) |
| 166 | return -EINVAL; |
| 167 | if (trx_id) |
| 168 | *trx_id = ul & 0xffff; |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
Holger Hans Peter Freyther | 301e628 | 2010-01-13 09:06:46 +0100 | [diff] [blame] | 173 | /* send the id ack */ |
| 174 | int ipaccess_send_id_ack(int fd) |
| 175 | { |
| 176 | return write(fd, id_ack, sizeof(id_ack)); |
| 177 | } |
| 178 | |
Holger Hans Peter Freyther | 3bc856b | 2010-02-07 12:04:07 +0100 | [diff] [blame] | 179 | int ipaccess_send_id_req(int fd) |
| 180 | { |
| 181 | return write(fd, id_req, sizeof(id_req)); |
| 182 | } |
| 183 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 184 | /* base handling of the ip.access protocol */ |
| 185 | int ipaccess_rcvmsg_base(struct msgb *msg, |
| 186 | struct bsc_fd *bfd) |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 187 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 188 | u_int8_t msg_type = *(msg->l2h); |
Holger Freyther | ff9592f | 2009-03-09 16:17:14 +0000 | [diff] [blame] | 189 | int ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 190 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 191 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 192 | case IPAC_MSGT_PING: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 193 | ret = write(bfd->fd, pong, sizeof(pong)); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 194 | break; |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 195 | case IPAC_MSGT_PONG: |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 196 | DEBUGP(DMI, "PONG!\n"); |
| 197 | break; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 198 | case IPAC_MSGT_ID_ACK: |
| 199 | DEBUGP(DMI, "ID_ACK? -> ACK!\n"); |
Holger Hans Peter Freyther | 301e628 | 2010-01-13 09:06:46 +0100 | [diff] [blame] | 200 | ret = ipaccess_send_id_ack(bfd->fd); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 201 | break; |
| 202 | } |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg, |
| 207 | struct bsc_fd *bfd) |
| 208 | { |
| 209 | struct tlv_parsed tlvp; |
| 210 | u_int8_t msg_type = *(msg->l2h); |
| 211 | u_int16_t site_id = 0, bts_id = 0, trx_id = 0; |
| 212 | struct gsm_bts *bts; |
| 213 | |
| 214 | /* handle base messages */ |
| 215 | ipaccess_rcvmsg_base(msg, bfd); |
| 216 | |
| 217 | switch (msg_type) { |
Harald Welte | 4f361fc | 2009-02-15 15:32:53 +0000 | [diff] [blame] | 218 | case IPAC_MSGT_ID_RESP: |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 219 | DEBUGP(DMI, "ID_RESP "); |
| 220 | /* parse tags, search for Unit ID */ |
Holger Hans Peter Freyther | d3d5be1 | 2010-02-09 14:37:23 +0100 | [diff] [blame] | 221 | ipaccess_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2, |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 222 | msgb_l2len(msg)-2); |
| 223 | DEBUGP(DMI, "\n"); |
| 224 | |
| 225 | if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) |
| 226 | break; |
| 227 | |
| 228 | /* lookup BTS, create sign_link, ... */ |
| 229 | parse_unitid((char *)TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT), |
| 230 | &site_id, &bts_id, &trx_id); |
| 231 | bts = find_bts_by_unitid(e1h->gsmnet, site_id, bts_id); |
| 232 | if (!bts) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 233 | LOGP(DINP, LOGL_ERROR, "Unable to find BTS configuration for " |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 234 | " %u/%u/%u, disconnecting\n", site_id, bts_id, |
| 235 | trx_id); |
| 236 | return -EIO; |
| 237 | } |
| 238 | 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] | 239 | if (bfd->priv_nr == PRIV_OML) { |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 240 | /* drop any old oml connection */ |
| 241 | ipaccess_drop_oml(bts); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 242 | bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1], |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 243 | E1INP_SIGN_OML, bts->c0, |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 244 | bts->oml_tei, 0); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 245 | } else if (bfd->priv_nr == PRIV_RSL) { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 246 | struct e1inp_ts *e1i_ts; |
| 247 | struct bsc_fd *newbfd; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 248 | 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] | 249 | |
| 250 | /* drop any old rsl connection */ |
| 251 | ipaccess_drop_rsl(trx); |
| 252 | |
| 253 | if (!bts->oml_link) { |
| 254 | bsc_unregister_fd(bfd); |
| 255 | close(bfd->fd); |
| 256 | bfd->fd = -1; |
| 257 | talloc_free(bfd); |
| 258 | return 0; |
| 259 | } |
| 260 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 261 | bfd->data = line = bts->oml_link->ts->line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 262 | e1i_ts = &line->ts[PRIV_RSL + trx_id - 1]; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 263 | newbfd = &e1i_ts->driver.ipaccess.fd; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 264 | e1inp_ts_config(e1i_ts, line, E1INP_TS_TYPE_SIGN); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 265 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 266 | trx->rsl_link = e1inp_sign_link_create(e1i_ts, |
| 267 | E1INP_SIGN_RSL, trx, |
| 268 | trx->rsl_tei, 0); |
Holger Hans Peter Freyther | 354ef81 | 2010-03-24 04:02:55 +0100 | [diff] [blame] | 269 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 270 | /* get rid of our old temporary bfd */ |
| 271 | memcpy(newbfd, bfd, sizeof(*newbfd)); |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 272 | newbfd->priv_nr = PRIV_RSL + trx_id; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 273 | bsc_unregister_fd(bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 274 | bfd->fd = -1; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 275 | talloc_free(bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 276 | bsc_register_fd(newbfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 277 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 278 | break; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 279 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 280 | return 0; |
| 281 | } |
| 282 | |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 283 | #define OML_UP 0x0001 |
| 284 | #define RSL_UP 0x0002 |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 285 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 286 | /* |
| 287 | * read one ipa message from the socket |
| 288 | * return NULL in case of error |
| 289 | */ |
| 290 | struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 291 | { |
Harald Welte | 966636f | 2009-06-26 19:39:35 +0200 | [diff] [blame] | 292 | struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "Abis/IP"); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 293 | struct ipaccess_head *hh; |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 294 | int len, ret = 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 295 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 296 | if (!msg) { |
| 297 | *error = -ENOMEM; |
| 298 | return NULL; |
| 299 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 300 | |
| 301 | /* first read our 3-byte header */ |
| 302 | hh = (struct ipaccess_head *) msg->data; |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 303 | ret = recv(bfd->fd, msg->data, sizeof(*hh), 0); |
| 304 | if (ret == 0) { |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 305 | msgb_free(msg); |
| 306 | *error = ret; |
| 307 | return NULL; |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 308 | } else if (ret != sizeof(*hh)) { |
| 309 | if (errno != EAGAIN) |
| 310 | 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] | 311 | msgb_free(msg); |
| 312 | *error = ret; |
| 313 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 314 | } |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 315 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 316 | msgb_put(msg, ret); |
| 317 | |
| 318 | /* then read te length as specified in header */ |
| 319 | msg->l2h = msg->data + sizeof(*hh); |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 320 | len = ntohs(hh->len); |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 321 | |
| 322 | if (len < 0 || TS1_ALLOC_SIZE < len + sizeof(*hh)) { |
| 323 | LOGP(DINP, LOGL_ERROR, "Can not read this packet. %d avail\n", len); |
| 324 | msgb_free(msg); |
| 325 | *error = -EIO; |
| 326 | return NULL; |
| 327 | } |
| 328 | |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 329 | ret = recv(bfd->fd, msg->l2h, len, 0); |
| 330 | if (ret < len) { |
Holger Hans Peter Freyther | b3121c5 | 2010-03-24 08:40:55 +0100 | [diff] [blame] | 331 | 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] | 332 | msgb_free(msg); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 333 | *error = -EIO; |
| 334 | return NULL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 335 | } |
| 336 | msgb_put(msg, ret); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 337 | |
| 338 | return msg; |
| 339 | } |
| 340 | |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 341 | int ipaccess_drop_oml(struct gsm_bts *bts) |
| 342 | { |
| 343 | struct gsm_bts_trx *trx; |
| 344 | struct e1inp_ts *ts; |
| 345 | struct e1inp_line *line; |
| 346 | struct bsc_fd *bfd; |
| 347 | |
| 348 | if (!bts || !bts->oml_link) |
| 349 | return -1; |
| 350 | |
| 351 | /* send OML down */ |
| 352 | ts = bts->oml_link->ts; |
| 353 | line = ts->line; |
Holger Hans Peter Freyther | f8eff2e | 2010-04-11 18:54:58 +0200 | [diff] [blame] | 354 | 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] | 355 | |
| 356 | bfd = &ts->driver.ipaccess.fd; |
| 357 | bsc_unregister_fd(bfd); |
| 358 | close(bfd->fd); |
| 359 | bfd->fd = -1; |
| 360 | |
| 361 | /* clean up OML and RSL */ |
| 362 | e1inp_sign_link_destroy(bts->oml_link); |
| 363 | bts->oml_link = NULL; |
| 364 | bts->ip_access.flags = 0; |
| 365 | |
| 366 | /* drop all RSL connections too */ |
| 367 | llist_for_each_entry(trx, &bts->trx_list, list) |
| 368 | ipaccess_drop_rsl(trx); |
| 369 | |
| 370 | /* kill the E1 line now... as we have no one left to use it */ |
| 371 | talloc_free(line); |
| 372 | |
| 373 | return -1; |
| 374 | } |
| 375 | |
| 376 | static int ipaccess_drop(struct e1inp_ts *ts, struct bsc_fd *bfd) |
| 377 | { |
| 378 | struct e1inp_sign_link *link; |
| 379 | int bts_nr; |
| 380 | |
| 381 | if (!ts) { |
| 382 | /* |
| 383 | * If we don't have a TS this means that this is a RSL |
| 384 | * connection but we are not past the authentication |
| 385 | * handling yet. So we can safely delete this bfd and |
| 386 | * wait for a reconnect. |
| 387 | */ |
| 388 | bsc_unregister_fd(bfd); |
| 389 | close(bfd->fd); |
| 390 | bfd->fd = -1; |
| 391 | talloc_free(bfd); |
| 392 | return -1; |
| 393 | } |
| 394 | |
| 395 | /* attempt to find a signalling link */ |
| 396 | if (ts->type == E1INP_TS_TYPE_SIGN) { |
| 397 | llist_for_each_entry(link, &ts->sign.sign_links, list) { |
| 398 | bts_nr = link->trx->bts->bts_nr; |
| 399 | /* we have issues just reconnecting RLS so we drop OML */ |
| 400 | ipaccess_drop_oml(link->trx->bts); |
| 401 | return bts_nr; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | /* error case */ |
| 406 | LOGP(DINP, LOGL_ERROR, "Failed to find a signalling link for ts: %p\n", ts); |
| 407 | bsc_unregister_fd(bfd); |
| 408 | close(bfd->fd); |
| 409 | bfd->fd = -1; |
| 410 | return -1; |
| 411 | } |
| 412 | |
| 413 | int ipaccess_drop_rsl(struct gsm_bts_trx *trx) |
| 414 | { |
| 415 | struct bsc_fd *bfd; |
| 416 | struct e1inp_ts *ts; |
| 417 | |
| 418 | if (!trx || !trx->rsl_link) |
| 419 | return -1; |
| 420 | |
| 421 | /* send RSL down */ |
| 422 | ts = trx->rsl_link->ts; |
Holger Hans Peter Freyther | f8eff2e | 2010-04-11 18:54:58 +0200 | [diff] [blame] | 423 | 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] | 424 | |
| 425 | /* close the socket */ |
| 426 | bfd = &ts->driver.ipaccess.fd; |
| 427 | bsc_unregister_fd(bfd); |
| 428 | close(bfd->fd); |
| 429 | bfd->fd = -1; |
| 430 | |
| 431 | /* destroy */ |
| 432 | e1inp_sign_link_destroy(trx->rsl_link); |
| 433 | trx->rsl_link = NULL; |
| 434 | |
| 435 | return -1; |
| 436 | } |
| 437 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 438 | static int handle_ts1_read(struct bsc_fd *bfd) |
| 439 | { |
| 440 | struct e1inp_line *line = bfd->data; |
| 441 | unsigned int ts_nr = bfd->priv_nr; |
| 442 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 443 | struct e1inp_sign_link *link; |
| 444 | struct msgb *msg; |
| 445 | struct ipaccess_head *hh; |
Holger Hans Peter Freyther | 67b5961 | 2009-10-27 10:08:38 +0100 | [diff] [blame] | 446 | int ret = 0, error; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 447 | |
| 448 | msg = ipaccess_read_msg(bfd, &error); |
| 449 | if (!msg) { |
| 450 | if (error == 0) { |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 451 | int ret = ipaccess_drop(e1i_ts, bfd); |
| 452 | if (ret >= 0) |
Harald Welte (local) | 7971d3d | 2009-12-28 17:52:11 +0100 | [diff] [blame] | 453 | LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n", |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 454 | ret); |
| 455 | else |
Harald Welte (local) | 7971d3d | 2009-12-28 17:52:11 +0100 | [diff] [blame] | 456 | LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n"); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 457 | } |
| 458 | return error; |
| 459 | } |
| 460 | |
Sylvain Munaut | 86538c7 | 2009-09-30 22:35:04 +0200 | [diff] [blame] | 461 | 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] | 462 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 463 | hh = (struct ipaccess_head *) msg->data; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 464 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 465 | ret = ipaccess_rcvmsg(line, msg, bfd); |
Holger Hans Peter Freyther | 70402a4 | 2010-04-15 11:17:24 +0200 | [diff] [blame] | 466 | if (ret < 0) |
| 467 | ipaccess_drop(e1i_ts, bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 468 | msgb_free(msg); |
| 469 | return ret; |
| 470 | } |
| 471 | /* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg() |
| 472 | * might have free'd it !!! */ |
| 473 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 474 | link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 475 | if (!link) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 476 | LOGP(DINP, LOGL_ERROR, "no matching signalling link for " |
| 477 | "hh->proto=0x%02x\n", hh->proto); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 478 | msgb_free(msg); |
| 479 | return -EIO; |
| 480 | } |
| 481 | msg->trx = link->trx; |
| 482 | |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 483 | switch (link->type) { |
| 484 | case E1INP_SIGN_RSL: |
Harald Welte | 1394fea | 2009-12-21 23:01:33 +0100 | [diff] [blame] | 485 | if (!(msg->trx->bts->ip_access.flags & (RSL_UP << msg->trx->nr))) { |
Harald Welte | e73501a | 2009-10-21 21:16:00 +0200 | [diff] [blame] | 486 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, link->tei, link->sapi); |
Harald Welte | 1394fea | 2009-12-21 23:01:33 +0100 | [diff] [blame] | 487 | msg->trx->bts->ip_access.flags |= (RSL_UP << msg->trx->nr); |
Harald Welte | e73501a | 2009-10-21 21:16:00 +0200 | [diff] [blame] | 488 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 489 | ret = abis_rsl_rcvmsg(msg); |
| 490 | break; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 491 | case E1INP_SIGN_OML: |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 492 | if (!(msg->trx->bts->ip_access.flags & OML_UP)) { |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 493 | e1inp_event(e1i_ts, EVT_E1_TEI_UP, link->tei, link->sapi); |
Harald Welte | 88a412a | 2009-12-16 17:32:37 +0100 | [diff] [blame] | 494 | msg->trx->bts->ip_access.flags |= OML_UP; |
Harald Welte | 7782c14 | 2009-02-15 03:39:51 +0000 | [diff] [blame] | 495 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 496 | ret = abis_nm_rcvmsg(msg); |
| 497 | break; |
| 498 | default: |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 499 | 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] | 500 | msgb_free(msg); |
| 501 | break; |
| 502 | } |
| 503 | return ret; |
| 504 | } |
| 505 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 506 | void ipaccess_prepend_header(struct msgb *msg, int proto) |
| 507 | { |
| 508 | struct ipaccess_head *hh; |
| 509 | |
| 510 | /* prepend the ip.access header */ |
| 511 | hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh)); |
Sylvain Munaut | d7d1c99 | 2009-10-29 16:33:59 +0100 | [diff] [blame] | 512 | hh->len = htons(msg->len - sizeof(*hh)); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 513 | hh->proto = proto; |
| 514 | } |
| 515 | |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 516 | static int ts_want_write(struct e1inp_ts *e1i_ts) |
| 517 | { |
| 518 | e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE; |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | static void timeout_ts1_write(void *data) |
| 524 | { |
| 525 | struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; |
| 526 | |
| 527 | /* trigger write of ts1, due to tx delay timer */ |
| 528 | ts_want_write(e1i_ts); |
| 529 | } |
| 530 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 531 | static int handle_ts1_write(struct bsc_fd *bfd) |
| 532 | { |
| 533 | struct e1inp_line *line = bfd->data; |
| 534 | unsigned int ts_nr = bfd->priv_nr; |
| 535 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 536 | struct e1inp_sign_link *sign_link; |
| 537 | struct msgb *msg; |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 538 | u_int8_t proto; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 539 | int ret; |
| 540 | |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 541 | bfd->when &= ~BSC_FD_WRITE; |
| 542 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 543 | /* get the next msg for this timeslot */ |
| 544 | msg = e1inp_tx_ts(e1i_ts, &sign_link); |
| 545 | if (!msg) { |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 546 | /* no message after tx delay timer */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 547 | return 0; |
| 548 | } |
| 549 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 550 | switch (sign_link->type) { |
| 551 | case E1INP_SIGN_OML: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 552 | proto = IPAC_PROTO_OML; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 553 | break; |
| 554 | case E1INP_SIGN_RSL: |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 555 | proto = IPAC_PROTO_RSL; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 556 | break; |
| 557 | default: |
| 558 | msgb_free(msg); |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 559 | bfd->when |= BSC_FD_WRITE; /* come back for more msg */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 560 | return -EINVAL; |
| 561 | } |
| 562 | |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 563 | msg->l2h = msg->data; |
Harald Welte | 8175e95 | 2009-10-20 00:22:00 +0200 | [diff] [blame] | 564 | ipaccess_prepend_header(msg, sign_link->tei); |
Holger Hans Peter Freyther | d5f0522 | 2009-08-18 10:05:45 +0200 | [diff] [blame] | 565 | |
| 566 | 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] | 567 | |
| 568 | ret = send(bfd->fd, msg->data, msg->len, 0); |
| 569 | msgb_free(msg); |
Andreas Eversberg | 38ae5cb | 2009-10-08 12:53:16 +0200 | [diff] [blame] | 570 | |
| 571 | /* set tx delay timer for next event */ |
| 572 | e1i_ts->sign.tx_timer.cb = timeout_ts1_write; |
| 573 | e1i_ts->sign.tx_timer.data = e1i_ts; |
Holger Hans Peter Freyther | 63cb447 | 2010-04-11 10:10:04 +0200 | [diff] [blame] | 574 | |
| 575 | /* Reducing this might break the nanoBTS 900 init. */ |
| 576 | bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 100000); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 577 | |
| 578 | return ret; |
| 579 | } |
| 580 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 581 | /* callback from select.c in case one of the fd's can be read/written */ |
| 582 | static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 583 | { |
| 584 | struct e1inp_line *line = bfd->data; |
| 585 | unsigned int ts_nr = bfd->priv_nr; |
| 586 | unsigned int idx = ts_nr-1; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 587 | struct e1inp_ts *e1i_ts; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 588 | int rc = 0; |
| 589 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 590 | /* In case of early RSL we might not yet have a line */ |
| 591 | |
| 592 | if (line) |
| 593 | e1i_ts = &line->ts[idx]; |
| 594 | |
| 595 | if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 596 | if (what & BSC_FD_READ) |
| 597 | rc = handle_ts1_read(bfd); |
| 598 | if (what & BSC_FD_WRITE) |
| 599 | rc = handle_ts1_write(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 600 | } else |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 601 | 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] | 602 | |
| 603 | return rc; |
| 604 | } |
| 605 | |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 606 | static struct msgb *read_gprs_msg(struct bsc_fd *bfd, int *error, |
| 607 | struct sockaddr_in *saddr) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 608 | { |
| 609 | struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "Abis/IP/GPRS"); |
| 610 | int ret = 0; |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 611 | socklen_t saddr_len = sizeof(*saddr); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 612 | |
| 613 | if (!msg) { |
| 614 | *error = -ENOMEM; |
| 615 | return NULL; |
| 616 | } |
| 617 | |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 618 | ret = recvfrom(bfd->fd, msg->data, TS1_ALLOC_SIZE, 0, |
| 619 | (struct sockaddr *)saddr, &saddr_len); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 620 | if (ret < 0) { |
| 621 | fprintf(stderr, "recv error %s\n", strerror(errno)); |
| 622 | msgb_free(msg); |
| 623 | *error = ret; |
| 624 | return NULL; |
| 625 | } else if (ret == 0) { |
| 626 | msgb_free(msg); |
| 627 | *error = ret; |
| 628 | return NULL; |
| 629 | } |
| 630 | |
| 631 | msg->l2h = msg->data; |
| 632 | msgb_put(msg, ret); |
| 633 | |
| 634 | return msg; |
| 635 | } |
| 636 | |
| 637 | static int handle_gprs_read(struct bsc_fd *bfd) |
| 638 | { |
| 639 | int error; |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 640 | struct sockaddr_in saddr; |
| 641 | struct msgb *msg = read_gprs_msg(bfd, &error, &saddr); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 642 | |
| 643 | if (!msg) |
| 644 | return error; |
| 645 | |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 646 | return gprs_ns_rcvmsg(msg, &saddr); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | static int handle_gprs_write(struct bsc_fd *bfd) |
| 650 | { |
| 651 | } |
| 652 | |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 653 | int ipac_gprs_send(struct msgb *msg, struct sockaddr_in *daddr) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 654 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 655 | int rc; |
| 656 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 657 | rc = sendto(e1h->gprs_fd.fd, msg->data, msg->len, 0, |
Harald Welte | 5434d7e | 2010-03-18 00:01:43 +0800 | [diff] [blame] | 658 | (struct sockaddr *)daddr, sizeof(*daddr)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 659 | |
| 660 | talloc_free(msg); |
| 661 | |
| 662 | return rc; |
| 663 | } |
| 664 | |
| 665 | /* UDP Port 23000 carries the LLC-in-BSSGP-in-NS protocol stack */ |
| 666 | static int gprs_fd_cb(struct bsc_fd *bfd, unsigned int what) |
| 667 | { |
| 668 | int rc; |
| 669 | |
| 670 | if (what & BSC_FD_READ) |
| 671 | rc = handle_gprs_read(bfd); |
| 672 | if (what & BSC_FD_WRITE) |
| 673 | rc = handle_gprs_write(bfd); |
| 674 | |
| 675 | return rc; |
| 676 | } |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 677 | |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 678 | struct e1inp_driver ipaccess_driver = { |
| 679 | .name = "ip.access", |
| 680 | .want_write = ts_want_write, |
| 681 | }; |
| 682 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 683 | /* callback of the OML listening filedescriptor */ |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 684 | static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 685 | { |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 686 | int ret; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 687 | int idx = 0; |
Holger Hans Peter Freyther | edee794 | 2010-03-24 11:20:27 +0100 | [diff] [blame] | 688 | int i; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 689 | struct e1inp_line *line; |
| 690 | struct e1inp_ts *e1i_ts; |
| 691 | struct bsc_fd *bfd; |
| 692 | struct sockaddr_in sa; |
| 693 | socklen_t sa_len = sizeof(sa); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 694 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 695 | if (!(what & BSC_FD_READ)) |
| 696 | return 0; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 697 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 698 | ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 699 | if (ret < 0) { |
| 700 | perror("accept"); |
| 701 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 702 | } |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 703 | LOGP(DINP, LOGL_NOTICE, "accept()ed new OML link from %s\n", |
| 704 | inet_ntoa(sa.sin_addr)); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 705 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 706 | line = talloc_zero(tall_bsc_ctx, struct e1inp_line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 707 | if (!line) { |
| 708 | close(ret); |
| 709 | return -ENOMEM; |
| 710 | } |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 711 | line->driver = &ipaccess_driver; |
| 712 | //line->driver_data = e1h; |
| 713 | /* create virrtual E1 timeslots for signalling */ |
| 714 | e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 715 | |
Holger Hans Peter Freyther | edee794 | 2010-03-24 11:20:27 +0100 | [diff] [blame] | 716 | /* initialize the fds */ |
| 717 | for (i = 0; i < ARRAY_SIZE(line->ts); ++i) |
| 718 | line->ts[i].driver.ipaccess.fd.fd = -1; |
| 719 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 720 | e1i_ts = &line->ts[idx]; |
| 721 | |
| 722 | bfd = &e1i_ts->driver.ipaccess.fd; |
| 723 | bfd->fd = ret; |
| 724 | bfd->data = line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 725 | bfd->priv_nr = PRIV_OML; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 726 | bfd->cb = ipaccess_fd_cb; |
| 727 | bfd->when = BSC_FD_READ; |
| 728 | ret = bsc_register_fd(bfd); |
| 729 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 730 | LOGP(DINP, LOGL_ERROR, "could not register FD\n"); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 731 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 732 | talloc_free(line); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 733 | return ret; |
| 734 | } |
| 735 | |
| 736 | /* 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] | 737 | ret = ipaccess_send_id_req(bfd->fd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 738 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 739 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 740 | //return e1inp_line_register(line); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 741 | } |
| 742 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 743 | static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what) |
| 744 | { |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 745 | struct sockaddr_in sa; |
| 746 | socklen_t sa_len = sizeof(sa); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 747 | struct bsc_fd *bfd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 748 | int ret; |
| 749 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 750 | if (!(what & BSC_FD_READ)) |
| 751 | return 0; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 752 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 753 | bfd = talloc_zero(tall_bsc_ctx, struct bsc_fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 754 | if (!bfd) |
| 755 | return -ENOMEM; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 756 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 757 | /* Some BTS has connected to us, but we don't know yet which line |
| 758 | * (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] | 759 | * allocate a temporary bfd until we have received ID from BTS */ |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 760 | |
| 761 | bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 762 | if (bfd->fd < 0) { |
| 763 | perror("accept"); |
| 764 | return bfd->fd; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 765 | } |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 766 | 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] | 767 | bfd->priv_nr = PRIV_RSL; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 768 | bfd->cb = ipaccess_fd_cb; |
| 769 | bfd->when = BSC_FD_READ; |
| 770 | ret = bsc_register_fd(bfd); |
| 771 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 772 | LOGP(DINP, LOGL_ERROR, "could not register FD\n"); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 773 | close(bfd->fd); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 774 | talloc_free(bfd); |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 775 | return ret; |
| 776 | } |
| 777 | /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */ |
| 778 | ret = write(bfd->fd, id_req, sizeof(id_req)); |
| 779 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 780 | return 0; |
| 781 | } |
| 782 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 783 | static int make_sock(struct bsc_fd *bfd, int proto, u_int16_t port, |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 784 | int (*cb)(struct bsc_fd *fd, unsigned int what)) |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 785 | { |
| 786 | struct sockaddr_in addr; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 787 | int ret, on = 1; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 788 | int type = SOCK_STREAM; |
| 789 | |
| 790 | if (proto == IPPROTO_UDP) |
| 791 | type = SOCK_DGRAM; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 792 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 793 | bfd->fd = socket(AF_INET, type, proto); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 794 | bfd->cb = cb; |
| 795 | bfd->when = BSC_FD_READ; |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 796 | //bfd->data = line; |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 797 | |
Holger Hans Peter Freyther | 4d2d95b | 2010-02-19 13:07:05 +0100 | [diff] [blame] | 798 | if (bfd->fd < 0) { |
| 799 | LOGP(DINP, LOGL_ERROR, "could not create TCP socket.\n"); |
| 800 | return -EIO; |
| 801 | } |
| 802 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 803 | memset(&addr, 0, sizeof(addr)); |
| 804 | addr.sin_family = AF_INET; |
| 805 | addr.sin_port = htons(port); |
| 806 | addr.sin_addr.s_addr = INADDR_ANY; |
| 807 | |
| 808 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 809 | |
| 810 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 811 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 812 | LOGP(DINP, LOGL_ERROR, "could not bind l2 socket %s\n", |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 813 | strerror(errno)); |
Holger Hans Peter Freyther | 4d2d95b | 2010-02-19 13:07:05 +0100 | [diff] [blame] | 814 | close(bfd->fd); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 815 | return -EIO; |
| 816 | } |
| 817 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 818 | if (proto != IPPROTO_UDP) { |
| 819 | ret = listen(bfd->fd, 1); |
| 820 | if (ret < 0) { |
| 821 | perror("listen"); |
| 822 | return ret; |
| 823 | } |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | ret = bsc_register_fd(bfd); |
| 827 | if (ret < 0) { |
| 828 | perror("register_listen_fd"); |
Holger Hans Peter Freyther | 4d2d95b | 2010-02-19 13:07:05 +0100 | [diff] [blame] | 829 | close(bfd->fd); |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 830 | return ret; |
| 831 | } |
| 832 | return 0; |
| 833 | } |
| 834 | |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 835 | /* Actively connect to a BTS. Currently used by ipaccess-config.c */ |
| 836 | int ipaccess_connect(struct e1inp_line *line, struct sockaddr_in *sa) |
| 837 | { |
| 838 | struct e1inp_ts *e1i_ts = &line->ts[0]; |
| 839 | struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd; |
| 840 | int ret, on = 1; |
| 841 | |
| 842 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 843 | bfd->cb = ipaccess_fd_cb; |
| 844 | bfd->when = BSC_FD_READ | BSC_FD_WRITE; |
| 845 | bfd->data = line; |
Holger Hans Peter Freyther | dc6af63 | 2010-03-24 04:56:13 +0100 | [diff] [blame] | 846 | bfd->priv_nr = PRIV_OML; |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 847 | |
Holger Hans Peter Freyther | 4d2d95b | 2010-02-19 13:07:05 +0100 | [diff] [blame] | 848 | if (bfd->fd < 0) { |
| 849 | LOGP(DINP, LOGL_ERROR, "could not create TCP socket.\n"); |
| 850 | return -EIO; |
| 851 | } |
| 852 | |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 853 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 854 | |
| 855 | ret = connect(bfd->fd, (struct sockaddr *) sa, sizeof(*sa)); |
| 856 | if (ret < 0) { |
Harald Welte | afdca0f | 2009-12-23 23:01:04 +0100 | [diff] [blame] | 857 | LOGP(DINP, LOGL_ERROR, "could not connect socket\n"); |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 858 | close(bfd->fd); |
| 859 | return ret; |
| 860 | } |
| 861 | |
| 862 | ret = bsc_register_fd(bfd); |
| 863 | if (ret < 0) { |
| 864 | close(bfd->fd); |
| 865 | return ret; |
| 866 | } |
| 867 | |
| 868 | line->driver = &ipaccess_driver; |
| 869 | |
Holger Hans Peter Freyther | 09e364b | 2009-08-10 07:59:27 +0200 | [diff] [blame] | 870 | return ret; |
Harald Welte | 4258182 | 2009-08-08 16:12:58 +0200 | [diff] [blame] | 871 | //return e1inp_line_register(line); |
Harald Welte | 25de991 | 2009-04-30 15:53:07 +0000 | [diff] [blame] | 872 | } |
| 873 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 874 | int ipaccess_setup(struct gsm_network *gsmnet) |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 875 | { |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 876 | int ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 877 | |
| 878 | /* register the driver with the core */ |
| 879 | /* FIXME: do this in the plugin initializer function */ |
| 880 | ret = e1inp_driver_register(&ipaccess_driver); |
| 881 | if (ret) |
| 882 | return ret; |
| 883 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 884 | e1h = talloc_zero(tall_bsc_ctx, struct ia_e1_handle); |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 885 | if (!e1h) |
| 886 | return -ENOMEM; |
Harald Welte | a4ffea9 | 2009-06-22 01:36:25 +0200 | [diff] [blame] | 887 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 888 | e1h->gsmnet = gsmnet; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 889 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 890 | /* Listen for OML connections */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 891 | ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, IPA_TCP_PORT_OML, |
| 892 | listen_fd_cb); |
Harald Welte | cf55978 | 2009-05-01 15:43:49 +0000 | [diff] [blame] | 893 | if (ret < 0) |
| 894 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 895 | |
Harald Welte | 5c1e458 | 2009-02-15 11:57:29 +0000 | [diff] [blame] | 896 | /* Listen for RSL connections */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 897 | ret = make_sock(&e1h->rsl_listen_fd, IPPROTO_TCP, |
| 898 | IPA_TCP_PORT_RSL, rsl_listen_fd_cb); |
| 899 | if (ret < 0) |
| 900 | return ret; |
| 901 | |
| 902 | /* Listen for incoming GPRS packets */ |
| 903 | ret = make_sock(&e1h->gprs_fd, IPPROTO_UDP, 23000, gprs_fd_cb); |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 904 | |
Harald Welte | edb3778 | 2009-05-01 14:59:07 +0000 | [diff] [blame] | 905 | return ret; |
Harald Welte | 5fd8a54 | 2009-02-13 02:43:36 +0000 | [diff] [blame] | 906 | } |