Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * The SS7 Application part for forwarding or nat... |
| 3 | * |
| 4 | * (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 5 | * (C) 2010-2011 by On-Waves |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software: you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation, either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <ss7_application.h> |
| 24 | #include <bsc_data.h> |
Holger Hans Peter Freyther | c5200fc | 2011-02-16 22:35:30 +0100 | [diff] [blame] | 25 | #include <bsc_sccp.h> |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 26 | #include <cellmgr_debug.h> |
| 27 | #include <msc_connection.h> |
| 28 | #include <sctp_m2ua.h> |
| 29 | |
| 30 | #include <osmocore/talloc.h> |
| 31 | |
Holger Hans Peter Freyther | c5200fc | 2011-02-16 22:35:30 +0100 | [diff] [blame] | 32 | |
| 33 | /* the SS7 dispatch... maybe as function pointers in the future */ |
Holger Hans Peter Freyther | 64b7d56 | 2011-02-16 23:00:50 +0100 | [diff] [blame] | 34 | void forward_sccp_stp(struct mtp_link_set *set, struct msgb *_msg, int sls) |
| 35 | { |
| 36 | struct mtp_link_set *other; |
| 37 | other = set->app->route_src.set == set ? |
| 38 | set->app->route_dst.set : set->app->route_src.set; |
| 39 | mtp_link_set_submit_sccp_data(other, sls, _msg->l2h, msgb_l2len(_msg)); |
| 40 | } |
| 41 | |
| 42 | void forward_isup_stp(struct mtp_link_set *set, struct msgb *msg, int sls) |
| 43 | { |
| 44 | struct mtp_link_set *other; |
| 45 | other = set->app->route_src.set == set ? |
| 46 | set->app->route_dst.set : set->app->route_src.set; |
| 47 | mtp_link_set_submit_isup_data(other, sls, msg->l3h, msgb_l3len(msg)); |
| 48 | } |
| 49 | |
| 50 | void mtp_link_set_forward_sccp(struct mtp_link_set *set, struct msgb *_msg, int sls) |
| 51 | { |
| 52 | if (!set->app) { |
| 53 | LOGP(DINP, LOGL_ERROR, "Linkset %d/%s has no application.\n", |
Holger Hans Peter Freyther | a33b23f | 2011-02-16 23:37:40 +0100 | [diff] [blame] | 54 | set->nr, set->name); |
Holger Hans Peter Freyther | 64b7d56 | 2011-02-16 23:00:50 +0100 | [diff] [blame] | 55 | return; |
| 56 | } |
| 57 | |
| 58 | switch (set->app->type) { |
| 59 | case APP_STP: |
| 60 | forward_sccp_stp(set, _msg, sls); |
| 61 | break; |
| 62 | case APP_CELLMGR: |
| 63 | case APP_RELAY: |
| 64 | app_forward_sccp(set->app, _msg, sls); |
| 65 | break; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | void mtp_link_set_forward_isup(struct mtp_link_set *set, struct msgb *msg, int sls) |
| 70 | { |
| 71 | if (!set->app) { |
| 72 | LOGP(DINP, LOGL_ERROR, "Linkset %d/%s has no application.\n", |
Holger Hans Peter Freyther | a33b23f | 2011-02-16 23:37:40 +0100 | [diff] [blame] | 73 | set->nr, set->name); |
Holger Hans Peter Freyther | 64b7d56 | 2011-02-16 23:00:50 +0100 | [diff] [blame] | 74 | return; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | switch (set->app->type) { |
| 79 | case APP_STP: |
| 80 | forward_isup_stp(set, msg, sls); |
| 81 | break; |
| 82 | case APP_CELLMGR: |
| 83 | case APP_RELAY: |
| 84 | LOGP(DINP, LOGL_ERROR, "ISUP is not handled.\n"); |
| 85 | break; |
| 86 | } |
| 87 | } |
| 88 | |
Holger Hans Peter Freyther | c5200fc | 2011-02-16 22:35:30 +0100 | [diff] [blame] | 89 | void mtp_linkset_down(struct mtp_link_set *set) |
| 90 | { |
| 91 | set->available = 0; |
| 92 | mtp_link_set_stop(set); |
| 93 | |
| 94 | if (set->app && set->app->type != APP_STP) { |
| 95 | app_clear_connections(set->app); |
| 96 | |
| 97 | /* If we have an A link send a reset to the MSC */ |
| 98 | msc_mgcp_reset(set->app->route_dst.msc); |
| 99 | msc_send_reset(set->app->route_dst.msc); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | void mtp_linkset_up(struct mtp_link_set *set) |
| 104 | { |
| 105 | set->available = 1; |
| 106 | |
| 107 | /* we have not gone through link down */ |
| 108 | if (set->app && set->app->type != APP_STP && |
| 109 | set->app->route_dst.msc->msc_link_down) { |
| 110 | app_clear_connections(set->app); |
| 111 | app_resources_released(set->app); |
| 112 | } |
| 113 | |
| 114 | mtp_link_set_reset(set); |
| 115 | } |
| 116 | |
| 117 | |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 118 | struct ss7_application *ss7_application_alloc(struct bsc_data *bsc) |
| 119 | { |
| 120 | struct ss7_application *app; |
| 121 | |
| 122 | app = talloc_zero(bsc, struct ss7_application); |
| 123 | if (!app) { |
| 124 | LOGP(DINP, LOGL_ERROR, "Failed to create SS7 Application.\n"); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | INIT_LLIST_HEAD(&app->sccp_connections); |
Holger Hans Peter Freyther | 169a1a9 | 2011-02-22 15:45:52 +0100 | [diff] [blame] | 129 | llist_add_tail(&app->entry, &bsc->apps); |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 130 | app->nr = bsc->num_apps++; |
| 131 | app->bsc = bsc; |
| 132 | |
| 133 | return app; |
| 134 | } |
| 135 | |
| 136 | struct ss7_application *ss7_application_num(struct bsc_data *bsc, int num) |
| 137 | { |
| 138 | struct ss7_application *ss7; |
| 139 | |
| 140 | llist_for_each_entry(ss7, &bsc->apps, entry) |
| 141 | if (ss7->nr == num) |
| 142 | return ss7; |
| 143 | |
| 144 | return NULL; |
| 145 | } |
| 146 | |
| 147 | static int ss7_app_setup_stp(struct ss7_application *app, |
| 148 | int src_type, int src_num, |
| 149 | int dst_type, int dst_num) |
| 150 | { |
| 151 | struct mtp_link_set *src, *dst; |
| 152 | |
| 153 | if (src_type != SS7_SET_LINKSET) { |
| 154 | LOGP(DINP, LOGL_ERROR, |
| 155 | "SS7 %d/%s source needs to be a linkset.\n", |
| 156 | app->nr, app->name); |
| 157 | return -1; |
| 158 | } |
| 159 | |
| 160 | if (dst_type != SS7_SET_LINKSET) { |
| 161 | LOGP(DINP, LOGL_ERROR, |
| 162 | "SS7 %d/%s destination needs to be a linkset.\n", |
| 163 | app->nr, app->name); |
| 164 | return -1; |
| 165 | } |
| 166 | |
| 167 | /* veryify the MTP Linkset */ |
| 168 | src = mtp_link_set_num(app->bsc, src_num); |
| 169 | if (!src) { |
| 170 | LOGP(DINP, LOGL_ERROR, |
| 171 | "SS7 %d/%s source linkset not found with nr: %d.\n", |
| 172 | app->nr, app->name, src_num); |
| 173 | return -2; |
| 174 | } |
| 175 | |
| 176 | if (src->app) { |
| 177 | LOGP(DINP, LOGL_ERROR, |
| 178 | "SS7 %d/%s is using linkset %d/%s\n", |
| 179 | src->app->nr, src->app->name, |
Holger Hans Peter Freyther | a33b23f | 2011-02-16 23:37:40 +0100 | [diff] [blame] | 180 | src->nr, src->name); |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 181 | return -3; |
| 182 | } |
| 183 | |
| 184 | /* veryify the MTP Linkset */ |
| 185 | dst = mtp_link_set_num(app->bsc, dst_num); |
| 186 | if (!dst) { |
| 187 | LOGP(DINP, LOGL_ERROR, |
| 188 | "SS7 %d/%s destionation linkset not found with nr: %d.\n", |
| 189 | app->nr, app->name, dst_num); |
| 190 | return -2; |
| 191 | } |
| 192 | |
| 193 | if (dst->app) { |
| 194 | LOGP(DINP, LOGL_ERROR, |
| 195 | "SS7 %d/%s is using linkset %d/%s\n", |
| 196 | dst->app->nr, dst->app->name, |
Holger Hans Peter Freyther | a33b23f | 2011-02-16 23:37:40 +0100 | [diff] [blame] | 197 | dst->nr, dst->name); |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 198 | return -3; |
| 199 | } |
| 200 | |
| 201 | /* now connect it */ |
| 202 | src->app = app; |
| 203 | app->route_src.type = src_type; |
| 204 | app->route_src.nr = src_num; |
| 205 | app->route_src.set = src; |
| 206 | app->route_src.msc = NULL; |
| 207 | |
| 208 | dst->app = app; |
| 209 | app->route_dst.type = dst_type; |
| 210 | app->route_dst.nr = dst_num; |
| 211 | app->route_dst.set = dst; |
| 212 | app->route_dst.msc = NULL; |
| 213 | |
| 214 | app->type = APP_STP; |
| 215 | app->bsc->m2ua_trans->started = 1; |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 216 | app->route_is_set = 1; |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 217 | |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | static int ss7_app_setup_relay(struct ss7_application *app, int type, |
| 222 | int src_type, int src_num, int dst_type, int dst_num) |
| 223 | { |
| 224 | struct mtp_link_set *mtp; |
| 225 | struct msc_connection *msc; |
| 226 | |
| 227 | /* verify the types */ |
| 228 | if (src_type != SS7_SET_LINKSET) { |
| 229 | LOGP(DINP, LOGL_ERROR, |
| 230 | "SS7 %d/%s source needs to be a linkset.\n", |
| 231 | app->nr, app->name); |
| 232 | return -1; |
| 233 | } |
| 234 | |
| 235 | if (dst_type != SS7_SET_MSC) { |
| 236 | LOGP(DINP, LOGL_ERROR, |
| 237 | "SS7 %d/%s dest needs to be a MSC.\n", |
| 238 | app->nr, app->name); |
| 239 | return -1; |
| 240 | } |
| 241 | |
| 242 | /* veryify the MTP Linkset */ |
| 243 | mtp = mtp_link_set_num(app->bsc, src_num); |
| 244 | if (!mtp) { |
| 245 | LOGP(DINP, LOGL_ERROR, |
| 246 | "SS7 %d/%s source linkset not found with nr: %d.\n", |
| 247 | app->nr, app->name, src_num); |
| 248 | return -2; |
| 249 | } |
| 250 | |
| 251 | if (mtp->app) { |
| 252 | LOGP(DINP, LOGL_ERROR, |
| 253 | "SS7 %d/%s is using linkset %d/%s\n", |
| 254 | mtp->app->nr, mtp->app->name, |
Holger Hans Peter Freyther | a33b23f | 2011-02-16 23:37:40 +0100 | [diff] [blame] | 255 | mtp->nr, mtp->name); |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 256 | return -3; |
| 257 | } |
| 258 | |
| 259 | /* verify the MSC connection */ |
| 260 | msc = msc_connection_num(app->bsc, dst_num); |
| 261 | if (!msc) { |
| 262 | LOGP(DINP, LOGL_ERROR, |
| 263 | "SS7 %d/%s dest MSC not found with nr: %d.\n", |
| 264 | app->nr, app->name, dst_num); |
| 265 | return -4; |
| 266 | } |
| 267 | |
| 268 | if (msc->app) { |
| 269 | LOGP(DINP, LOGL_ERROR, |
| 270 | "SS7 %d/%s is using MSC connection %d/%s\n", |
| 271 | msc->app->nr, msc->app->name, |
| 272 | msc->nr, msc->name); |
| 273 | return -5; |
| 274 | } |
| 275 | |
| 276 | |
| 277 | /* now connect it and run the app */ |
| 278 | mtp->app = app; |
| 279 | app->route_src.type = src_type; |
| 280 | app->route_src.nr = src_num; |
| 281 | app->route_src.set = mtp; |
| 282 | app->route_src.msc = NULL; |
| 283 | |
| 284 | msc->app = app; |
| 285 | app->route_dst.type = dst_type; |
| 286 | app->route_dst.nr = dst_num; |
| 287 | app->route_dst.set = NULL; |
| 288 | app->route_dst.msc = msc; |
| 289 | |
| 290 | app->type = type; |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 291 | app->route_is_set = 1; |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 292 | |
Holger Hans Peter Freyther | a7bc3aa | 2011-02-16 16:12:07 +0100 | [diff] [blame] | 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | int ss7_application_setup(struct ss7_application *ss7, int type, |
| 297 | int src_type, int src_num, |
| 298 | int dst_type, int dst_num) |
| 299 | { |
| 300 | switch (type) { |
| 301 | case APP_CELLMGR: |
| 302 | case APP_RELAY: |
| 303 | return ss7_app_setup_relay(ss7, type, src_type, src_num, |
| 304 | dst_type, dst_num); |
| 305 | break; |
| 306 | case APP_STP: |
| 307 | return ss7_app_setup_stp(ss7, src_type, src_num, |
| 308 | dst_type, dst_num); |
| 309 | default: |
| 310 | LOGP(DINP, LOGL_ERROR, |
| 311 | "SS7 Application %d is not supported.\n", type); |
| 312 | return -1; |
| 313 | } |
| 314 | } |
Holger Hans Peter Freyther | ab7c601 | 2011-02-16 22:23:52 +0100 | [diff] [blame] | 315 | |
| 316 | |
| 317 | static void start_mtp(struct mtp_link_set *set) |
| 318 | { |
| 319 | struct mtp_link *link; |
| 320 | |
| 321 | llist_for_each_entry(link, &set->links, entry) |
| 322 | link->reset(link); |
| 323 | } |
| 324 | |
| 325 | static void start_msc(struct msc_connection *msc) |
| 326 | { |
| 327 | msc_connection_start(msc); |
| 328 | } |
| 329 | |
Holger Hans Peter Freyther | cfe9d71 | 2011-02-17 20:32:09 +0100 | [diff] [blame] | 330 | static void start_set(struct ss7_application *app, struct mtp_link_set *set) |
| 331 | { |
| 332 | if (!set) |
| 333 | return; |
| 334 | |
| 335 | set->isup_opc = set->isup_opc >= 0 ? set->isup_opc : set->opc; |
| 336 | set->sccp_opc = set->sccp_opc >= 0 ? set->sccp_opc : set->opc; |
| 337 | set->pass_all_isup = app->isup_pass; |
| 338 | start_mtp(set); |
| 339 | } |
| 340 | |
Holger Hans Peter Freyther | ab7c601 | 2011-02-16 22:23:52 +0100 | [diff] [blame] | 341 | int ss7_application_start(struct ss7_application *app) |
| 342 | { |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 343 | if (!app->route_is_set) { |
| 344 | LOGP(DINP, LOGL_ERROR, |
| 345 | "The routes are not configured on app %d.\n", app->nr); |
| 346 | return -1; |
| 347 | } |
| 348 | |
Holger Hans Peter Freyther | cfe9d71 | 2011-02-17 20:32:09 +0100 | [diff] [blame] | 349 | start_set(app, app->route_src.set); |
| 350 | start_set(app, app->route_dst.set); |
Holger Hans Peter Freyther | ab7c601 | 2011-02-16 22:23:52 +0100 | [diff] [blame] | 351 | |
| 352 | if (app->route_src.msc) |
| 353 | start_msc(app->route_src.msc); |
| 354 | if (app->route_dst.msc) |
| 355 | start_msc(app->route_dst.msc); |
| 356 | |
| 357 | LOGP(DINP, LOGL_NOTICE, "SS7 Application %d/%s is now running.\n", |
| 358 | app->nr, app->name); |
| 359 | return 0; |
| 360 | } |
Holger Hans Peter Freyther | cfe9d71 | 2011-02-17 20:32:09 +0100 | [diff] [blame] | 361 | |
| 362 | void ss7_application_pass_isup(struct ss7_application *app, int pass) |
| 363 | { |
| 364 | if (app->route_src.set) |
| 365 | app->route_src.set->pass_all_isup = pass; |
| 366 | if (app->route_dst.set) |
| 367 | app->route_dst.set->pass_all_isup = pass; |
| 368 | } |