Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 1 | /* SMPP 3.4 interface, SMSC-side implementation */ |
| 2 | /* (C) 2012 by Harald Welte <laforge@gnumonks.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <unistd.h> |
| 22 | #include <string.h> |
| 23 | #include <stdint.h> |
| 24 | #include <errno.h> |
| 25 | |
| 26 | #include <sys/socket.h> |
| 27 | #include <netinet/in.h> |
| 28 | |
| 29 | #include <smpp34.h> |
| 30 | #include <smpp34_structs.h> |
| 31 | #include <smpp34_params.h> |
| 32 | |
| 33 | #include <osmocom/core/utils.h> |
| 34 | #include <osmocom/core/socket.h> |
| 35 | #include <osmocom/core/msgb.h> |
| 36 | #include <osmocom/core/logging.h> |
| 37 | #include <osmocom/core/write_queue.h> |
| 38 | #include <osmocom/core/talloc.h> |
| 39 | |
| 40 | #include "smpp_smsc.h" |
| 41 | |
| 42 | #include <openbsc/debug.h> |
| 43 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 44 | /*! \brief Ugly wrapper. libsmpp34 should do this itself! */ |
| 45 | #define SMPP34_UNPACK(rc, type, str, data, len) \ |
| 46 | memset(str, 0, sizeof(*str)); \ |
| 47 | rc = smpp34_unpack(type, str, data, len) |
| 48 | |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 49 | enum emse_bind { |
| 50 | ESME_BIND_RX = 0x01, |
| 51 | ESME_BIND_TX = 0x02, |
| 52 | }; |
| 53 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 54 | /*! \brief increaes the use/reference count */ |
| 55 | void smpp_esme_get(struct osmo_esme *esme) |
| 56 | { |
| 57 | esme->use++; |
| 58 | } |
| 59 | |
| 60 | static void esme_destroy(struct osmo_esme *esme) |
| 61 | { |
| 62 | osmo_wqueue_clear(&esme->wqueue); |
| 63 | if (esme->wqueue.bfd.fd >= 0) { |
| 64 | osmo_fd_unregister(&esme->wqueue.bfd); |
| 65 | close(esme->wqueue.bfd.fd); |
| 66 | } |
| 67 | llist_del(&esme->list); |
| 68 | talloc_free(esme); |
| 69 | } |
| 70 | |
| 71 | /*! \brief decrease the use/reference count, free if it is 0 */ |
| 72 | void smpp_esme_put(struct osmo_esme *esme) |
| 73 | { |
| 74 | esme->use--; |
| 75 | if (esme->use <= 0) |
| 76 | esme_destroy(esme); |
| 77 | } |
| 78 | |
Harald Welte | 4341309 | 2012-11-08 19:44:08 +0100 | [diff] [blame] | 79 | static struct osmo_esme * |
| 80 | esme_by_system_id(const struct smsc *smsc, char *system_id) |
| 81 | { |
| 82 | struct osmo_esme *e; |
| 83 | |
| 84 | llist_for_each_entry(e, &smsc->esme_list, list) { |
| 85 | if (!strcmp(e->system_id, system_id)) |
| 86 | return e; |
| 87 | } |
| 88 | return NULL; |
| 89 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 90 | |
| 91 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 92 | /*! \brief initialize the libsmpp34 data structure for a response */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 93 | #define INIT_RESP(type, resp, req) { \ |
| 94 | memset((resp), 0, sizeof(*(resp))); \ |
| 95 | (resp)->command_length = 0; \ |
| 96 | (resp)->command_id = type; \ |
| 97 | (resp)->command_status = ESME_ROK; \ |
| 98 | (resp)->sequence_number = (req)->sequence_number; \ |
| 99 | } |
| 100 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 101 | /*! \brief pack a libsmpp34 data strcutrure and send it to the ESME */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 102 | #define PACK_AND_SEND(esme, ptr) pack_and_send(esme, (ptr)->command_id, ptr) |
| 103 | static int pack_and_send(struct osmo_esme *esme, uint32_t type, void *ptr) |
| 104 | { |
| 105 | struct msgb *msg = msgb_alloc(4096, "SMPP_Tx"); |
| 106 | int rc, rlen; |
| 107 | if (!msg) |
| 108 | return -ENOMEM; |
| 109 | |
| 110 | rc = smpp34_pack(type, msg->tail, msgb_tailroom(msg), &rlen, ptr); |
| 111 | if (rc != 0) { |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 112 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error during smpp34_pack(): %s\n", |
| 113 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 114 | msgb_free(msg); |
| 115 | return -EINVAL; |
| 116 | } |
| 117 | msgb_put(msg, rlen); |
| 118 | |
| 119 | return osmo_wqueue_enqueue(&esme->wqueue, msg); |
| 120 | } |
| 121 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 122 | /*! \brief transmit a generic NACK to a remote ESME */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 123 | static int smpp_tx_gen_nack(struct osmo_esme *esme, uint32_t seq, uint32_t status) |
| 124 | { |
| 125 | struct generic_nack_t nack; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 126 | char buf[SMALL_BUFF]; |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 127 | |
| 128 | nack.command_length = 0; |
| 129 | nack.command_id = GENERIC_NACK; |
| 130 | nack.sequence_number = seq; |
| 131 | nack.command_status = status; |
| 132 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 133 | LOGP(DSMPP, LOGL_ERROR, "[%s] Tx GENERIC NACK: %s\n", |
| 134 | esme->system_id, str_command_status(status, buf)); |
| 135 | |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 136 | return PACK_AND_SEND(esme, &nack); |
| 137 | } |
| 138 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 139 | /*! \brief retrieve SMPP command ID from a msgb */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 140 | static inline uint32_t smpp_msgb_cmdid(struct msgb *msg) |
| 141 | { |
| 142 | uint8_t *tmp = msgb_data(msg) + 4; |
| 143 | return ntohl(*(uint32_t *)tmp); |
| 144 | } |
| 145 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 146 | /*! \brief retrieve SMPP sequence number from a msgb */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 147 | static inline uint32_t smpp_msgb_seq(struct msgb *msg) |
| 148 | { |
| 149 | uint8_t *tmp = msgb_data(msg); |
| 150 | return ntohl(*(uint32_t *)tmp); |
| 151 | } |
| 152 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 153 | /*! \brief handle an incoming SMPP generic NACK */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 154 | static int smpp_handle_gen_nack(struct osmo_esme *esme, struct msgb *msg) |
| 155 | { |
| 156 | struct generic_nack_t nack; |
| 157 | char buf[SMALL_BUFF]; |
| 158 | int rc; |
| 159 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 160 | SMPP34_UNPACK(rc, GENERIC_NACK, &nack, msgb_data(msg), |
| 161 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 162 | if (rc < 0) { |
| 163 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 164 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 165 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 166 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 167 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 168 | LOGP(DSMPP, LOGL_ERROR, "[%s] Rx GENERIC NACK: %s\n", |
| 169 | esme->system_id, str_command_status(nack.command_status, buf)); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 174 | /*! \brief handle an incoming SMPP BIND RECEIVER */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 175 | static int smpp_handle_bind_rx(struct osmo_esme *esme, struct msgb *msg) |
| 176 | { |
| 177 | struct bind_receiver_t bind; |
| 178 | struct bind_receiver_resp_t bind_r; |
| 179 | int rc; |
| 180 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 181 | SMPP34_UNPACK(rc, BIND_RECEIVER, &bind, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 182 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 183 | if (rc < 0) { |
| 184 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 185 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 186 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 187 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 188 | |
| 189 | INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); |
| 190 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 191 | LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Rx from (Version %02x)\n", |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 192 | bind.system_id, bind.interface_version); |
| 193 | |
| 194 | if (bind.interface_version != SMPP_VERSION) { |
| 195 | bind_r.command_status = ESME_RSYSERR; |
| 196 | goto err; |
| 197 | } |
| 198 | |
| 199 | if (esme->bind_flags) { |
| 200 | bind_r.command_status = ESME_RALYBND; |
| 201 | goto err; |
| 202 | } |
| 203 | |
| 204 | esme->smpp_version = bind.interface_version; |
| 205 | snprintf(esme->system_id, sizeof(esme->system_id), "%s", |
| 206 | bind.system_id); |
| 207 | esme->bind_flags = ESME_BIND_RX; |
| 208 | |
| 209 | /* FIXME */ |
| 210 | err: |
| 211 | return 0; |
| 212 | } |
| 213 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 214 | /*! \brief handle an incoming SMPP BIND TRANSMITTER */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 215 | static int smpp_handle_bind_tx(struct osmo_esme *esme, struct msgb *msg) |
| 216 | { |
| 217 | struct bind_transmitter_t bind; |
| 218 | struct bind_transmitter_resp_t bind_r; |
| 219 | struct tlv_t tlv; |
| 220 | int rc; |
| 221 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 222 | SMPP34_UNPACK(rc, BIND_TRANSMITTER, &bind, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 223 | msgb_length(msg)); |
| 224 | if (rc < 0) { |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 225 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 226 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 227 | return rc; |
| 228 | } |
| 229 | |
| 230 | INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); |
| 231 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 232 | LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Tx (Version %02x)\n", |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 233 | bind.system_id, bind.interface_version); |
| 234 | |
| 235 | if (bind.interface_version != SMPP_VERSION) { |
| 236 | bind_r.command_status = ESME_RSYSERR; |
| 237 | goto err; |
| 238 | } |
| 239 | |
| 240 | if (esme->bind_flags) { |
| 241 | bind_r.command_status = ESME_RALYBND; |
| 242 | goto err; |
| 243 | } |
| 244 | |
| 245 | esme->smpp_version = bind.interface_version; |
| 246 | snprintf(esme->system_id, sizeof(esme->system_id), "%s", bind.system_id); |
| 247 | esme->bind_flags = ESME_BIND_TX; |
| 248 | |
| 249 | /* build response */ |
| 250 | snprintf((char *)bind_r.system_id, sizeof(bind_r.system_id), "%s", |
| 251 | esme->smsc->system_id); |
| 252 | |
| 253 | /* add interface version TLV */ |
| 254 | tlv.tag = TLVID_sc_interface_version; |
| 255 | tlv.length = sizeof(uint8_t); |
| 256 | tlv.value.val16 = esme->smpp_version; |
| 257 | build_tlv(&bind_r.tlv, &tlv); |
| 258 | |
| 259 | err: |
| 260 | return PACK_AND_SEND(esme, &bind_r); |
| 261 | } |
| 262 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 263 | /*! \brief handle an incoming SMPP BIND TRANSCEIVER */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 264 | static int smpp_handle_bind_trx(struct osmo_esme *esme, struct msgb *msg) |
| 265 | { |
| 266 | struct bind_transceiver_t bind; |
| 267 | struct bind_transceiver_resp_t bind_r; |
| 268 | int rc; |
| 269 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 270 | SMPP34_UNPACK(rc, BIND_TRANSCEIVER, &bind, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 271 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 272 | if (rc < 0) { |
| 273 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 274 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 275 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 276 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 277 | |
| 278 | INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); |
| 279 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 280 | LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Trx (Version %02x)\n", |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 281 | bind.system_id, bind.interface_version); |
| 282 | |
| 283 | if (bind.interface_version != SMPP_VERSION) { |
| 284 | bind_r.command_status = ESME_RSYSERR; |
| 285 | goto err; |
| 286 | } |
| 287 | |
| 288 | if (esme->bind_flags) { |
| 289 | bind_r.command_status = ESME_RALYBND; |
| 290 | goto err; |
| 291 | } |
| 292 | |
| 293 | esme->smpp_version = bind.interface_version; |
| 294 | snprintf(esme->system_id, sizeof(esme->system_id), "%s", bind.system_id); |
| 295 | esme->bind_flags |= ESME_BIND_TX | ESME_BIND_RX; |
| 296 | |
| 297 | /* FIXME */ |
| 298 | err: |
| 299 | return 0; |
| 300 | } |
| 301 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 302 | /*! \brief handle an incoming SMPP UNBIND */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 303 | static int smpp_handle_unbind(struct osmo_esme *esme, struct msgb *msg) |
| 304 | { |
| 305 | struct unbind_t unbind; |
| 306 | struct unbind_resp_t unbind_r; |
| 307 | int rc; |
| 308 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 309 | SMPP34_UNPACK(rc, UNBIND, &unbind, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 310 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 311 | if (rc < 0) { |
| 312 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 313 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 314 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 315 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 316 | |
| 317 | INIT_RESP(UNBIND_RESP, &unbind_r, &unbind); |
| 318 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 319 | LOGP(DSMPP, LOGL_INFO, "[%s] Rx UNBIND\n", esme->system_id); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 320 | |
| 321 | if (esme->bind_flags == 0) { |
| 322 | unbind_r.command_status = ESME_RINVBNDSTS; |
| 323 | goto err; |
| 324 | } |
| 325 | |
| 326 | esme->bind_flags = 0; |
| 327 | err: |
| 328 | return PACK_AND_SEND(esme, &unbind_r); |
| 329 | } |
| 330 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 331 | /*! \brief handle an incoming SMPP ENQUIRE LINK */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 332 | static int smpp_handle_enq_link(struct osmo_esme *esme, struct msgb *msg) |
| 333 | { |
| 334 | struct enquire_link_t enq; |
| 335 | struct enquire_link_resp_t enq_r; |
| 336 | int rc; |
| 337 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 338 | SMPP34_UNPACK(rc, ENQUIRE_LINK, &enq, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 339 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 340 | if (rc < 0) { |
| 341 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 342 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 343 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 344 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 345 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 346 | LOGP(DSMPP, LOGL_DEBUG, "[%s] Rx Enquire Link\n", esme->system_id); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 347 | |
| 348 | INIT_RESP(ENQUIRE_LINK_RESP, &enq_r, &enq); |
| 349 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 350 | LOGP(DSMPP, LOGL_DEBUG, "[%s] Tx Enquire Link Response\n", esme->system_id); |
| 351 | |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 352 | return PACK_AND_SEND(esme, &enq_r); |
| 353 | } |
| 354 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 355 | /*! \brief send a SUBMIT-SM RESPONSE to a remote ESME */ |
Harald Welte | 4341309 | 2012-11-08 19:44:08 +0100 | [diff] [blame] | 356 | int smpp_tx_submit_r(struct osmo_esme *esme, uint32_t sequence_nr, |
| 357 | uint32_t command_status, char *msg_id) |
| 358 | { |
| 359 | struct submit_sm_resp_t submit_r; |
| 360 | |
| 361 | memset(&submit_r, 0, sizeof(submit_r)); |
| 362 | submit_r.command_length = 0; |
| 363 | submit_r.command_id = SUBMIT_SM_RESP; |
| 364 | submit_r.command_status = command_status; |
| 365 | submit_r.sequence_number= sequence_nr; |
Harald Welte | 475cb61 | 2012-11-09 12:51:44 +0100 | [diff] [blame] | 366 | snprintf((char *) submit_r.message_id, sizeof(submit_r.message_id), "%s", msg_id); |
Harald Welte | 4341309 | 2012-11-08 19:44:08 +0100 | [diff] [blame] | 367 | |
| 368 | return PACK_AND_SEND(esme, &submit_r); |
| 369 | } |
| 370 | |
Harald Welte | 475cb61 | 2012-11-09 12:51:44 +0100 | [diff] [blame] | 371 | static const struct value_string smpp_avail_strs[] = { |
| 372 | { 0, "Available" }, |
| 373 | { 1, "Denied" }, |
| 374 | { 2, "Unavailable" }, |
| 375 | { 0, NULL } |
| 376 | }; |
| 377 | |
| 378 | /*! \brief send an ALERT_NOTIFICATION to a remote ESME */ |
| 379 | int smpp_tx_alert(struct osmo_esme *esme, uint8_t ton, uint8_t npi, |
| 380 | const char *addr, uint8_t avail_status) |
| 381 | { |
| 382 | struct alert_notification_t alert; |
| 383 | struct tlv_t tlv; |
| 384 | |
| 385 | memset(&alert, 0, sizeof(alert)); |
| 386 | alert.command_length = 0; |
| 387 | alert.command_id = ALERT_NOTIFICATION; |
| 388 | alert.command_status = ESME_ROK; |
| 389 | alert.sequence_number = esme->own_seq_nr++; |
| 390 | alert.source_addr_ton = ton; |
| 391 | alert.source_addr_npi = npi; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 392 | snprintf((char *)alert.source_addr, sizeof(alert.source_addr), "%s", addr); |
Harald Welte | 475cb61 | 2012-11-09 12:51:44 +0100 | [diff] [blame] | 393 | |
| 394 | tlv.tag = TLVID_ms_availability_status; |
| 395 | tlv.length = sizeof(uint8_t); |
| 396 | tlv.value.val08 = avail_status; |
| 397 | build_tlv(&alert.tlv, &tlv); |
| 398 | |
| 399 | LOGP(DSMPP, LOGL_DEBUG, "[%s] Tx ALERT_NOTIFICATION (%s/%u/%u): %s\n", |
| 400 | esme->system_id, alert.source_addr, alert.source_addr_ton, |
| 401 | alert.source_addr_npi, |
| 402 | get_value_string(smpp_avail_strs, avail_status)); |
| 403 | |
| 404 | return PACK_AND_SEND(esme, &alert); |
| 405 | } |
| 406 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 407 | /*! \brief handle an incoming SMPP SUBMIT-SM */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 408 | static int smpp_handle_submit(struct osmo_esme *esme, struct msgb *msg) |
| 409 | { |
| 410 | struct submit_sm_t submit; |
| 411 | struct submit_sm_resp_t submit_r; |
| 412 | int rc; |
| 413 | |
Harald Welte | aecf4b9 | 2012-11-08 22:12:45 +0100 | [diff] [blame] | 414 | memset(&submit, 0, sizeof(submit)); |
| 415 | SMPP34_UNPACK(rc, SUBMIT_SM, &submit, msgb_data(msg), |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 416 | msgb_length(msg)); |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 417 | if (rc < 0) { |
| 418 | LOGP(DSMPP, LOGL_ERROR, "[%s] Error in smpp34_unpack():%s\n", |
| 419 | esme->system_id, smpp34_strerror); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 420 | return rc; |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 421 | } |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 422 | |
| 423 | INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); |
| 424 | |
| 425 | if (!(esme->bind_flags & ESME_BIND_TX)) { |
| 426 | submit_r.command_status = ESME_RINVBNDSTS; |
| 427 | return PACK_AND_SEND(esme, &submit_r); |
| 428 | } |
| 429 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 430 | LOGP(DSMPP, LOGL_INFO, "[%s] Rx SUBMIT-SM (%s/%u/%u)\n", |
| 431 | esme->system_id, submit.destination_addr, |
| 432 | submit.dest_addr_ton, submit.dest_addr_npi); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 433 | |
| 434 | INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); |
| 435 | |
| 436 | rc = handle_smpp_submit(esme, &submit, &submit_r); |
| 437 | if (rc == 0) |
| 438 | return PACK_AND_SEND(esme, &submit_r); |
| 439 | |
| 440 | return rc; |
| 441 | } |
| 442 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 443 | /*! \brief one complete SMPP PDU from the ESME has been received */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 444 | static int smpp_pdu_rx(struct osmo_esme *esme, struct msgb *msg) |
| 445 | { |
| 446 | uint32_t cmd_id = smpp_msgb_cmdid(msg); |
| 447 | int rc = 0; |
| 448 | |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 449 | LOGP(DSMPP, LOGL_DEBUG, "[%s] smpp_pdu_rx(%s)\n", esme->system_id, |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 450 | osmo_hexdump(msgb_data(msg), msgb_length(msg))); |
| 451 | |
| 452 | switch (cmd_id) { |
| 453 | case GENERIC_NACK: |
| 454 | rc = smpp_handle_gen_nack(esme, msg); |
| 455 | break; |
| 456 | case BIND_RECEIVER: |
| 457 | rc = smpp_handle_bind_rx(esme, msg); |
| 458 | break; |
| 459 | case BIND_TRANSMITTER: |
| 460 | rc = smpp_handle_bind_tx(esme, msg); |
| 461 | break; |
| 462 | case BIND_TRANSCEIVER: |
| 463 | rc = smpp_handle_bind_trx(esme, msg); |
| 464 | break; |
| 465 | case UNBIND: |
| 466 | rc = smpp_handle_unbind(esme, msg); |
| 467 | break; |
| 468 | case ENQUIRE_LINK: |
| 469 | rc = smpp_handle_enq_link(esme, msg); |
| 470 | break; |
| 471 | case SUBMIT_SM: |
| 472 | rc = smpp_handle_submit(esme, msg); |
| 473 | break; |
| 474 | case DELIVER_SM: |
| 475 | break; |
| 476 | case DATA_SM: |
| 477 | break; |
| 478 | case CANCEL_SM: |
| 479 | case QUERY_SM: |
| 480 | case REPLACE_SM: |
| 481 | case SUBMIT_MULTI: |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 482 | LOGP(DSMPP, LOGL_NOTICE, "[%s] Unimplemented PDU Commmand " |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 483 | "0x%08x\n", esme->system_id, cmd_id); |
| 484 | break; |
| 485 | default: |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 486 | LOGP(DSMPP, LOGL_ERROR, "[%s] Unknown PDU Command 0x%08x\n", |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 487 | esme->system_id, cmd_id); |
| 488 | rc = smpp_tx_gen_nack(esme, smpp_msgb_seq(msg), ESME_RINVCMDID); |
| 489 | break; |
| 490 | } |
| 491 | |
| 492 | return rc; |
| 493 | } |
| 494 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 495 | /* !\brief call-back when per-ESME TCP socket has some data to be read */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 496 | static int esme_link_read_cb(struct osmo_fd *ofd) |
| 497 | { |
| 498 | struct osmo_esme *esme = ofd->data; |
| 499 | uint32_t len; |
| 500 | uint8_t *lenptr = (uint8_t *) &len; |
| 501 | uint8_t *cur; |
| 502 | struct msgb *msg; |
| 503 | int rdlen; |
| 504 | int rc; |
| 505 | |
| 506 | switch (esme->read_state) { |
| 507 | case READ_ST_IN_LEN: |
| 508 | rdlen = sizeof(uint32_t) - esme->read_idx; |
| 509 | rc = read(ofd->fd, lenptr + esme->read_idx, rdlen); |
| 510 | if (rc < 0) { |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 511 | LOGP(DSMPP, LOGL_ERROR, "[%s] read returned %d\n", |
| 512 | esme->system_id, rc); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 513 | } else if (rc == 0) { |
| 514 | goto dead_socket; |
| 515 | } else |
| 516 | esme->read_idx += rc; |
| 517 | if (esme->read_idx >= sizeof(uint32_t)) { |
| 518 | esme->read_len = ntohl(len); |
| 519 | msg = msgb_alloc(esme->read_len, "SMPP Rx"); |
| 520 | if (!msg) |
| 521 | return -ENOMEM; |
| 522 | esme->read_msg = msg; |
| 523 | cur = msgb_put(msg, sizeof(uint32_t)); |
| 524 | memcpy(cur, lenptr, sizeof(uint32_t)); |
| 525 | esme->read_state = READ_ST_IN_MSG; |
| 526 | esme->read_idx = sizeof(uint32_t); |
| 527 | } |
| 528 | break; |
| 529 | case READ_ST_IN_MSG: |
| 530 | msg = esme->read_msg; |
| 531 | rdlen = esme->read_len - esme->read_idx; |
| 532 | rc = read(ofd->fd, msg->tail, OSMO_MIN(rdlen, msgb_tailroom(msg))); |
| 533 | if (rc < 0) { |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 534 | LOGP(DSMPP, LOGL_ERROR, "[%s] read returned %d\n", |
| 535 | esme->system_id, rc); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 536 | } else if (rc == 0) { |
| 537 | goto dead_socket; |
| 538 | } else { |
| 539 | esme->read_idx += rc; |
| 540 | msgb_put(msg, rc); |
| 541 | } |
| 542 | |
| 543 | if (esme->read_idx >= esme->read_len) { |
| 544 | rc = smpp_pdu_rx(esme, esme->read_msg); |
| 545 | esme->read_msg = NULL; |
| 546 | esme->read_idx = 0; |
| 547 | esme->read_len = 0; |
| 548 | esme->read_state = READ_ST_IN_LEN; |
| 549 | } |
| 550 | break; |
| 551 | } |
| 552 | |
| 553 | return 0; |
| 554 | dead_socket: |
| 555 | msgb_free(esme->read_msg); |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 556 | osmo_fd_unregister(&esme->wqueue.bfd); |
| 557 | close(esme->wqueue.bfd.fd); |
| 558 | esme->wqueue.bfd.fd = -1; |
| 559 | smpp_esme_put(esme); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 560 | |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | /* call-back of write queue once it wishes to write a message to the socket */ |
| 565 | static void esme_link_write_cb(struct osmo_fd *ofd, struct msgb *msg) |
| 566 | { |
| 567 | struct osmo_esme *esme = ofd->data; |
| 568 | int rc; |
| 569 | |
| 570 | rc = write(ofd->fd, msgb_data(msg), msgb_length(msg)); |
| 571 | if (rc == 0) { |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 572 | osmo_fd_unregister(&esme->wqueue.bfd); |
| 573 | close(esme->wqueue.bfd.fd); |
| 574 | esme->wqueue.bfd.fd = -1; |
| 575 | smpp_esme_put(esme); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 576 | } else if (rc < msgb_length(msg)) { |
Harald Welte | 6bc15a1 | 2012-11-09 13:02:49 +0100 | [diff] [blame] | 577 | LOGP(DSMPP, LOGL_ERROR, "[%s] Short write\n", esme->system_id); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 578 | return; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | /* callback for already-accepted new TCP socket */ |
| 583 | static int link_accept_cb(struct smsc *smsc, int fd, |
| 584 | struct sockaddr_storage *s, socklen_t s_len) |
| 585 | { |
| 586 | struct osmo_esme *esme = talloc_zero(smsc, struct osmo_esme); |
| 587 | if (!esme) |
| 588 | return -ENOMEM; |
| 589 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 590 | smpp_esme_get(esme); |
Harald Welte | 475cb61 | 2012-11-09 12:51:44 +0100 | [diff] [blame] | 591 | esme->own_seq_nr = rand(); |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 592 | esme->smsc = smsc; |
| 593 | osmo_wqueue_init(&esme->wqueue, 10); |
| 594 | esme->wqueue.bfd.fd = fd; |
| 595 | esme->wqueue.bfd.data = esme; |
| 596 | esme->wqueue.bfd.when = BSC_FD_READ; |
| 597 | osmo_fd_register(&esme->wqueue.bfd); |
| 598 | |
| 599 | esme->wqueue.read_cb = esme_link_read_cb; |
| 600 | esme->wqueue.write_cb = esme_link_write_cb; |
| 601 | |
| 602 | esme->sa_len = OSMO_MIN(sizeof(esme->sa), s_len); |
| 603 | memcpy(&esme->sa, s, esme->sa_len); |
| 604 | |
| 605 | llist_add_tail(&esme->list, &smsc->esme_list); |
| 606 | |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* callback of listening TCP socket */ |
| 611 | static int smsc_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| 612 | { |
| 613 | int rc; |
| 614 | struct sockaddr_storage sa; |
| 615 | socklen_t sa_len = sizeof(sa); |
| 616 | |
| 617 | rc = accept(ofd->fd, (struct sockaddr *)&sa, &sa_len); |
| 618 | if (rc < 0) { |
| 619 | LOGP(DSMPP, LOGL_ERROR, "Accept returns %d (%s)\n", |
| 620 | rc, strerror(errno)); |
| 621 | return rc; |
| 622 | } |
| 623 | return link_accept_cb(ofd->data, rc, &sa, sa_len); |
| 624 | } |
| 625 | |
Harald Welte | bf6d98e | 2012-11-08 20:11:05 +0100 | [diff] [blame] | 626 | /*! \brief Initialize the SMSC-side SMPP implementation */ |
Harald Welte | 2dba82d | 2012-11-08 16:14:37 +0100 | [diff] [blame] | 627 | int smpp_smsc_init(struct smsc *smsc, uint16_t port) |
| 628 | { |
| 629 | int rc; |
| 630 | |
| 631 | INIT_LLIST_HEAD(&smsc->esme_list); |
| 632 | smsc->listen_ofd.data = smsc; |
| 633 | smsc->listen_ofd.cb = smsc_fd_cb; |
| 634 | rc = osmo_sock_init_ofd(&smsc->listen_ofd, AF_UNSPEC, SOCK_STREAM, |
| 635 | IPPROTO_TCP, NULL, port, OSMO_SOCK_F_BIND); |
| 636 | |
| 637 | return rc; |
| 638 | } |