Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 1 | /* Run M2UA over SCTP here */ |
| 2 | /* (C) 2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Affero General Public License as published by |
| 6 | * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Affero General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include <sctp_m2ua.h> |
| 19 | #include <bsc_data.h> |
| 20 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 21 | #include <counter.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 22 | #include <mtp_data.h> |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 23 | #include <mtp_pcap.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 24 | |
| 25 | #include <osmocore/talloc.h> |
| 26 | |
| 27 | #include <sys/socket.h> |
| 28 | #include <arpa/inet.h> |
| 29 | |
| 30 | #include <string.h> |
| 31 | #include <unistd.h> |
| 32 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 33 | static struct mtp_m2ua_link *find_m2ua_link(struct sctp_m2ua_transport *trans, int link_index) |
| 34 | { |
| 35 | struct mtp_m2ua_link *link; |
| 36 | link_index = link_index; |
| 37 | |
| 38 | llist_for_each_entry(link, &trans->links, entry) { |
| 39 | if (link->link_index == link_index) |
| 40 | return link; |
| 41 | } |
| 42 | |
| 43 | return NULL; |
| 44 | } |
| 45 | |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 46 | static void link_down(struct mtp_link *link) |
| 47 | { |
| 48 | rate_ctr_inc(&link->ctrg->ctr[MTP_LNK_ERROR]); |
| 49 | mtp_link_down(link); |
| 50 | } |
| 51 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 52 | static void m2ua_conn_destroy(struct sctp_m2ua_conn *conn) |
| 53 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 54 | struct mtp_m2ua_link *link; |
| 55 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 56 | close(conn->queue.bfd.fd); |
| 57 | bsc_unregister_fd(&conn->queue.bfd); |
| 58 | write_queue_clear(&conn->queue); |
| 59 | llist_del(&conn->entry); |
| 60 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 61 | /* TODO: hardcoded link index */ |
| 62 | link = find_m2ua_link(conn->trans, 0); |
| 63 | if (link && conn->asp_up && conn->asp_active && conn->established) |
| 64 | link_down(&link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 65 | talloc_free(conn); |
| 66 | |
| 67 | #warning "Notify any other AS(P) for failover scenario" |
| 68 | } |
| 69 | |
| 70 | static int m2ua_conn_send(struct sctp_m2ua_conn *conn, |
| 71 | struct m2ua_msg *m2ua, |
| 72 | struct sctp_sndrcvinfo *info) |
| 73 | { |
| 74 | struct msgb *msg; |
| 75 | msg = m2ua_to_msg(m2ua); |
| 76 | if (!msg) |
| 77 | return -1; |
| 78 | |
| 79 | /* save the OOB data in front of the message */ |
| 80 | msg->l2h = msg->data; |
| 81 | msgb_push(msg, sizeof(*info)); |
| 82 | memcpy(msg->data, info, sizeof(*info)); |
| 83 | |
| 84 | if (write_queue_enqueue(&conn->queue, msg) != 0) { |
| 85 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue.\n"); |
| 86 | msgb_free(msg); |
| 87 | return -1; |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 93 | static int m2ua_conn_send_ntfy(struct mtp_m2ua_link *link, |
| 94 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 95 | struct sctp_sndrcvinfo *info) |
| 96 | { |
| 97 | struct m2ua_msg *msg; |
| 98 | uint16_t state[2]; |
| 99 | int rc; |
| 100 | |
| 101 | msg = m2ua_msg_alloc(); |
| 102 | if (!msg) |
| 103 | return -1; |
| 104 | msg->hdr.msg_class = M2UA_CLS_MGMT; |
| 105 | msg->hdr.msg_type = M2UA_MGMT_NTFY; |
| 106 | |
| 107 | /* state change */ |
| 108 | state[0] = ntohs(M2UA_STP_AS_STATE_CHG); |
| 109 | |
| 110 | if (conn->asp_active) |
| 111 | state[1] = ntohs(M2UA_STP_AS_ACTIVE); |
| 112 | else |
| 113 | state[1] = ntohs(M2UA_STP_AS_INACTIVE); |
| 114 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 115 | /* TODO: embed the interface identifier */ |
| 116 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 117 | m2ua_msg_add_data(msg, MUA_TAG_STATUS, 4, (uint8_t *) state); |
| 118 | m2ua_msg_add_data(msg, MUA_TAG_ASP_IDENT, 4, conn->asp_ident); |
| 119 | rc = m2ua_conn_send(conn, msg, info); |
| 120 | m2ua_msg_free(msg); |
| 121 | |
| 122 | return rc; |
| 123 | } |
| 124 | |
| 125 | static int m2ua_handle_asp_ack(struct sctp_m2ua_conn *conn, |
| 126 | struct m2ua_msg *m2ua, |
| 127 | struct sctp_sndrcvinfo *info) |
| 128 | { |
| 129 | struct m2ua_msg_part *asp_ident; |
| 130 | struct m2ua_msg *ack; |
| 131 | |
| 132 | asp_ident = m2ua_msg_find_tag(m2ua, MUA_TAG_ASP_IDENT); |
| 133 | if (!asp_ident) { |
| 134 | LOGP(DINP, LOGL_ERROR, "ASP UP lacks ASP IDENT\n"); |
| 135 | return -1; |
| 136 | } |
| 137 | if (asp_ident->len != 4) { |
| 138 | LOGP(DINP, LOGL_ERROR, "ASP Ident needs to be four byte.\n"); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | /* TODO: Better handling for fail over is needed here */ |
| 143 | ack = m2ua_msg_alloc(); |
| 144 | if (!ack) { |
| 145 | LOGP(DINP, LOGL_ERROR, "Failed to create response\n"); |
| 146 | return -1; |
| 147 | } |
| 148 | |
| 149 | ack->hdr.msg_class = M2UA_CLS_ASPSM; |
| 150 | ack->hdr.msg_type = M2UA_ASPSM_UP_ACK; |
| 151 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 152 | m2ua_msg_free(ack); |
| 153 | return -1; |
| 154 | } |
| 155 | |
| 156 | memcpy(conn->asp_ident, asp_ident->dat, 4); |
| 157 | conn->asp_up = 1; |
| 158 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 159 | m2ua_msg_free(ack); |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static int m2ua_handle_asp(struct sctp_m2ua_conn *conn, |
| 164 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 165 | { |
| 166 | switch (m2ua->hdr.msg_type) { |
| 167 | case M2UA_ASPSM_UP: |
| 168 | m2ua_handle_asp_ack(conn, m2ua, info); |
| 169 | break; |
| 170 | default: |
| 171 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 172 | m2ua->hdr.msg_type); |
| 173 | break; |
| 174 | } |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 179 | static int m2ua_handle_asptm_act(struct mtp_m2ua_link *link, |
| 180 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 181 | struct m2ua_msg *m2ua, |
| 182 | struct sctp_sndrcvinfo *info) |
| 183 | { |
| 184 | struct m2ua_msg *ack; |
| 185 | |
| 186 | /* TODO: parse the interface identifiers. This is plural */ |
| 187 | ack = m2ua_msg_alloc(); |
| 188 | if (!ack) |
| 189 | return -1; |
| 190 | |
| 191 | ack->hdr.msg_class = M2UA_CLS_ASPTM; |
| 192 | ack->hdr.msg_type = M2UA_ASPTM_ACTIV_ACK; |
| 193 | |
| 194 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 195 | m2ua_msg_free(ack); |
| 196 | return -1; |
| 197 | } |
| 198 | |
| 199 | conn->asp_active = 1; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 200 | m2ua_conn_send_ntfy(link, conn, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 201 | m2ua_msg_free(ack); |
| 202 | return 0; |
| 203 | } |
| 204 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 205 | static int m2ua_handle_asptm(struct mtp_m2ua_link *link, |
| 206 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 207 | struct m2ua_msg *m2ua, |
| 208 | struct sctp_sndrcvinfo *info) |
| 209 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 210 | if (!link) { |
| 211 | LOGP(DINP, LOGL_ERROR, "Link is required.\n"); |
| 212 | return -1; |
| 213 | } |
| 214 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 215 | switch (m2ua->hdr.msg_type) { |
| 216 | case M2UA_ASPTM_ACTIV: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 217 | m2ua_handle_asptm_act(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 218 | break; |
| 219 | default: |
| 220 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 221 | m2ua->hdr.msg_type); |
| 222 | break; |
| 223 | } |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 228 | static int m2ua_handle_state_req(struct mtp_m2ua_link *link, |
| 229 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 230 | struct m2ua_msg *m2ua, |
| 231 | struct sctp_sndrcvinfo *info) |
| 232 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 233 | struct m2ua_msg_part *state; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 234 | struct m2ua_msg *conf; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 235 | int req; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 236 | |
| 237 | state = m2ua_msg_find_tag(m2ua, M2UA_TAG_STATE_REQ); |
| 238 | if (!state || state->len != 4) { |
| 239 | LOGP(DINP, LOGL_ERROR, "Mandantory state request not present.\n"); |
| 240 | return -1; |
| 241 | } |
| 242 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 243 | memcpy(&req, state->dat, 4); |
| 244 | req = ntohl(req); |
| 245 | |
| 246 | switch (req) { |
| 247 | case M2UA_STATUS_EMER_SET: |
| 248 | conf = m2ua_msg_alloc(); |
| 249 | if (!conf) |
| 250 | return -1; |
| 251 | |
| 252 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 253 | conf->hdr.msg_type = M2UA_MAUP_STATE_CON; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 254 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &link->link_index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 255 | m2ua_msg_add_data(conf, M2UA_TAG_STATE_REQ, 4, (uint8_t *) &req); |
| 256 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 257 | m2ua_msg_free(conf); |
| 258 | return -1; |
| 259 | } |
| 260 | m2ua_msg_free(conf); |
| 261 | break; |
| 262 | default: |
| 263 | LOGP(DINP, LOGL_ERROR, "Unknown STATE Request: %d\n", req); |
| 264 | break; |
| 265 | } |
| 266 | |
| 267 | return 0; |
| 268 | } |
| 269 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 270 | static int m2ua_handle_est_req(struct mtp_m2ua_link *link, |
| 271 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 272 | struct m2ua_msg *m2ua, |
| 273 | struct sctp_sndrcvinfo *info) |
| 274 | { |
| 275 | struct m2ua_msg *conf; |
| 276 | |
| 277 | conf = m2ua_msg_alloc(); |
| 278 | if (!conf) |
| 279 | return -1; |
| 280 | |
| 281 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 282 | conf->hdr.msg_type = M2UA_MAUP_EST_CON; |
| 283 | |
| 284 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 285 | m2ua_msg_free(conf); |
| 286 | return -1; |
| 287 | } |
| 288 | |
| 289 | conn->established = 1; |
| 290 | LOGP(DINP, LOGL_NOTICE, "M2UA/Link is established.\n"); |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 291 | mtp_link_up(&link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 292 | m2ua_msg_free(conf); |
| 293 | return 0; |
| 294 | } |
| 295 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 296 | static int m2ua_handle_rel_req(struct mtp_m2ua_link *link, |
| 297 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 298 | struct m2ua_msg *m2ua, |
| 299 | struct sctp_sndrcvinfo *info) |
| 300 | { |
| 301 | struct m2ua_msg *conf; |
| 302 | |
| 303 | conf = m2ua_msg_alloc(); |
| 304 | if (!conf) |
| 305 | return -1; |
| 306 | |
| 307 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 308 | conf->hdr.msg_type = M2UA_MAUP_REL_CON; |
| 309 | |
| 310 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 311 | m2ua_msg_free(conf); |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | conn->established = 0; |
| 316 | LOGP(DINP, LOGL_NOTICE, "M2UA/Link is released.\n"); |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 317 | link_down(&link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 318 | m2ua_msg_free(conf); |
| 319 | return 0; |
| 320 | } |
| 321 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 322 | static int m2ua_handle_data(struct mtp_m2ua_link *_link, |
| 323 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 324 | struct m2ua_msg *m2ua, |
| 325 | struct sctp_sndrcvinfo *info) |
| 326 | { |
| 327 | struct msgb *msg; |
| 328 | struct m2ua_msg_part *data; |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 329 | struct mtp_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 330 | |
| 331 | data = m2ua_msg_find_tag(m2ua, M2UA_TAG_DATA); |
| 332 | if (!data) { |
| 333 | LOGP(DINP, LOGL_ERROR, "No DATA in DATA message.\n"); |
| 334 | return -1; |
| 335 | } |
| 336 | |
| 337 | if (data->len > 2048) { |
| 338 | LOGP(DINP, LOGL_ERROR, "TOO much data for us to handle.\n"); |
| 339 | return -1; |
| 340 | } |
| 341 | |
| 342 | msg = msgb_alloc(2048, "m2ua-data"); |
| 343 | if (!msg) { |
| 344 | LOGP(DINP, LOGL_ERROR, "Failed to allocate storage.\n"); |
| 345 | return -1; |
| 346 | } |
| 347 | |
| 348 | msg->l2h = msgb_put(msg, data->len); |
| 349 | memcpy(msg->l2h, data->dat, data->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 350 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 351 | link = &_link->base; |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 352 | if (!link->blocked) { |
| 353 | mtp_handle_pcap(link, NET_IN, msg->l2h, msgb_l2len(msg)); |
| 354 | mtp_link_set_data(link, msg); |
| 355 | } |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 356 | msgb_free(msg); |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 361 | static int m2ua_handle_maup(struct mtp_m2ua_link *link, |
| 362 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 363 | struct m2ua_msg *m2ua, |
| 364 | struct sctp_sndrcvinfo *info) |
| 365 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 366 | if (!link) { |
| 367 | LOGP(DINP, LOGL_ERROR, "Link is required.\n"); |
| 368 | return -1; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 371 | switch (m2ua->hdr.msg_type) { |
| 372 | case M2UA_MAUP_STATE_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 373 | m2ua_handle_state_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 374 | break; |
| 375 | case M2UA_MAUP_EST_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 376 | m2ua_handle_est_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 377 | break; |
| 378 | case M2UA_MAUP_REL_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 379 | m2ua_handle_rel_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 380 | break; |
| 381 | case M2UA_MAUP_DATA: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 382 | m2ua_handle_data(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 383 | break; |
| 384 | default: |
| 385 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 386 | m2ua->hdr.msg_type); |
| 387 | break; |
| 388 | } |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int m2ua_handle_mgmt(struct sctp_m2ua_conn *conn, |
| 394 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 395 | { |
| 396 | switch (m2ua->hdr.msg_type) { |
| 397 | case M2UA_MGMT_ERROR: |
| 398 | LOGP(DINP, LOGL_ERROR, "We did something wrong. Error...\n"); |
| 399 | break; |
| 400 | case M2UA_MGMT_NTFY: |
| 401 | LOGP(DINP, LOGL_NOTICE, "There was a notiy.. but we should only send it.\n"); |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 408 | static int m2ua_find_interface(struct m2ua_msg *m2ua, int def) |
| 409 | { |
| 410 | struct m2ua_msg_part *ident; |
| 411 | |
| 412 | ident = m2ua_msg_find_tag(m2ua, MUA_TAG_IDENT_INT); |
| 413 | if (ident && ident->len == 4) { |
| 414 | memcpy(&def, ident->dat, 4); |
| 415 | def = ntohl(def); |
| 416 | } |
| 417 | |
| 418 | return def; |
| 419 | } |
| 420 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 421 | static int m2ua_conn_handle(struct sctp_m2ua_conn *conn, |
| 422 | struct msgb *msg, struct sctp_sndrcvinfo *info) |
| 423 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 424 | struct mtp_m2ua_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 425 | struct m2ua_msg *m2ua; |
| 426 | m2ua = m2ua_from_msg(msg->len, msg->data); |
| 427 | if (!m2ua) { |
| 428 | LOGP(DINP, LOGL_ERROR, "Failed to parse the message.\n"); |
| 429 | return -1; |
| 430 | } |
| 431 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 432 | link = find_m2ua_link(conn->trans, m2ua_find_interface(m2ua, 0)); |
| 433 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 434 | switch (m2ua->hdr.msg_class) { |
| 435 | case M2UA_CLS_MGMT: |
| 436 | m2ua_handle_mgmt(conn, m2ua, info); |
| 437 | break; |
| 438 | case M2UA_CLS_ASPSM: |
| 439 | m2ua_handle_asp(conn, m2ua, info); |
| 440 | break; |
| 441 | case M2UA_CLS_ASPTM: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 442 | m2ua_handle_asptm(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 443 | break; |
| 444 | case M2UA_CLS_MAUP: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 445 | m2ua_handle_maup(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 446 | break; |
| 447 | default: |
| 448 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_class %d\n", |
| 449 | m2ua->hdr.msg_class); |
| 450 | break; |
| 451 | } |
| 452 | |
| 453 | m2ua_msg_free(m2ua); |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static int m2ua_conn_read(struct bsc_fd *fd) |
| 458 | { |
| 459 | struct sockaddr_in addr; |
| 460 | struct sctp_sndrcvinfo info; |
| 461 | socklen_t len = sizeof(addr); |
| 462 | struct msgb *msg; |
| 463 | int rc; |
| 464 | |
| 465 | msg = msgb_alloc(2048, "m2ua buffer"); |
| 466 | if (!msg) { |
| 467 | LOGP(DINP, LOGL_ERROR, "Failed to allocate buffer.\n"); |
| 468 | m2ua_conn_destroy(fd->data); |
| 469 | return -1; |
| 470 | } |
| 471 | |
| 472 | memset(&info, 0, sizeof(info)); |
| 473 | memset(&addr, 0, sizeof(addr)); |
| 474 | rc = sctp_recvmsg(fd->fd, msg->data, msg->data_len, |
| 475 | (struct sockaddr *) &addr, &len, &info, NULL); |
Holger Hans Peter Freyther | c5562bd | 2011-01-26 11:02:42 +0100 | [diff] [blame] | 476 | if (rc <= 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 477 | LOGP(DINP, LOGL_ERROR, "Failed to read.\n"); |
| 478 | m2ua_conn_destroy(fd->data); |
| 479 | return -1; |
| 480 | } |
| 481 | |
| 482 | msgb_put(msg, rc); |
| 483 | LOGP(DINP, LOGL_NOTICE, "Read %d on stream: %d ssn: %d assoc: %d\n", |
| 484 | rc, info.sinfo_stream, info.sinfo_ssn, info.sinfo_assoc_id); |
| 485 | m2ua_conn_handle(fd->data, msg, &info); |
| 486 | msgb_free(msg); |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static int sctp_m2ua_write(struct mtp_link *link, struct msgb *msg) |
| 491 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 492 | struct mtp_m2ua_link *mlink; |
| 493 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 494 | struct sctp_m2ua_conn *conn = NULL, *tmp; |
| 495 | struct sctp_sndrcvinfo info; |
| 496 | struct m2ua_msg *m2ua; |
| 497 | uint32_t interface; |
| 498 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 499 | mlink = (struct mtp_m2ua_link *) link; |
| 500 | trans = mlink->transport; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 501 | |
| 502 | if (llist_empty(&trans->conns)) |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 503 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 504 | |
| 505 | llist_for_each_entry(tmp, &trans->conns, entry) |
| 506 | if (tmp->established && tmp->asp_active && tmp->asp_up) { |
| 507 | conn = tmp; |
| 508 | break; |
| 509 | } |
| 510 | |
| 511 | if (!conn) { |
| 512 | LOGP(DINP, LOGL_ERROR, "No active ASP?\n"); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 513 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | m2ua = m2ua_msg_alloc(); |
| 517 | if (!m2ua) |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 518 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 519 | |
Holger Hans Peter Freyther | 36260e9 | 2011-01-22 17:37:56 +0100 | [diff] [blame] | 520 | mtp_handle_pcap(link, NET_OUT, msg->data, msg->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 521 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 522 | m2ua->hdr.msg_class = M2UA_CLS_MAUP; |
| 523 | m2ua->hdr.msg_type = M2UA_MAUP_DATA; |
| 524 | |
| 525 | interface = htonl(0); |
| 526 | m2ua_msg_add_data(m2ua, MUA_TAG_IDENT_INT, 4, (uint8_t *) &interface); |
| 527 | m2ua_msg_add_data(m2ua, M2UA_TAG_DATA, msg->len, msg->data); |
| 528 | |
| 529 | memset(&info, 0, sizeof(info)); |
| 530 | info.sinfo_stream = 1; |
| 531 | info.sinfo_assoc_id = 1; |
| 532 | info.sinfo_ppid = htonl(2); |
| 533 | |
| 534 | m2ua_conn_send(conn, m2ua, &info); |
| 535 | m2ua_msg_free(m2ua); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 536 | |
| 537 | clean: |
| 538 | msgb_free(msg); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | static int m2ua_conn_write(struct bsc_fd *fd, struct msgb *msg) |
| 543 | { |
| 544 | int ret; |
| 545 | struct sctp_sndrcvinfo info; |
| 546 | memcpy(&info, msg->data, sizeof(info)); |
| 547 | |
| 548 | ret = sctp_send(fd->fd, msg->l2h, msgb_l2len(msg), |
| 549 | &info, 0); |
| 550 | |
| 551 | if (ret != msgb_l2len(msg)) |
| 552 | LOGP(DINP, LOGL_ERROR, "Failed to send %d.\n", ret); |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | static int sctp_trans_accept(struct bsc_fd *fd, unsigned int what) |
| 558 | { |
| 559 | struct sctp_event_subscribe events; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 560 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 561 | struct sctp_m2ua_conn *conn; |
| 562 | struct sockaddr_in addr; |
| 563 | socklen_t len; |
| 564 | int s; |
| 565 | |
| 566 | len = sizeof(addr); |
| 567 | s = accept(fd->fd, (struct sockaddr *) &addr, &len); |
| 568 | if (s < 0) { |
| 569 | LOGP(DINP, LOGL_ERROR, "Failed to accept.\n"); |
| 570 | return -1; |
| 571 | } |
| 572 | |
| 573 | trans = fd->data; |
| 574 | if (!trans->started) { |
| 575 | LOGP(DINP, LOGL_NOTICE, "The link is not started.\n"); |
| 576 | close(s); |
| 577 | return -1; |
| 578 | } |
| 579 | |
| 580 | LOGP(DINP, LOGL_NOTICE, "Got a new SCTP connection.\n"); |
| 581 | conn = talloc_zero(fd->data, struct sctp_m2ua_conn); |
| 582 | if (!conn) { |
| 583 | LOGP(DINP, LOGL_ERROR, "Failed to create.\n"); |
| 584 | close(s); |
| 585 | return -1; |
| 586 | } |
| 587 | |
| 588 | conn->trans = trans; |
| 589 | |
| 590 | write_queue_init(&conn->queue, 10); |
| 591 | conn->queue.bfd.fd = s; |
| 592 | conn->queue.bfd.data = conn; |
| 593 | conn->queue.bfd.when = BSC_FD_READ; |
| 594 | conn->queue.read_cb = m2ua_conn_read; |
| 595 | conn->queue.write_cb = m2ua_conn_write; |
| 596 | |
| 597 | if (bsc_register_fd(&conn->queue.bfd) != 0) { |
| 598 | LOGP(DINP, LOGL_ERROR, "Failed to register.\n"); |
| 599 | close(s); |
| 600 | talloc_free(conn); |
| 601 | return -1; |
| 602 | } |
| 603 | |
| 604 | memset(&events, 0, sizeof(events)); |
| 605 | events.sctp_data_io_event = 1; |
| 606 | setsockopt(s, SOL_SCTP, SCTP_EVENTS, &events, sizeof(events)); |
| 607 | |
| 608 | llist_add_tail(&conn->entry, &trans->conns); |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | static int sctp_m2ua_dummy(struct mtp_link *link) |
| 613 | { |
| 614 | return 0; |
| 615 | } |
| 616 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 617 | static int sctp_m2ua_start(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 618 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 619 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 620 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 621 | link->transport->started = 1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 622 | return 0; |
| 623 | } |
| 624 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 625 | static int sctp_m2ua_reset(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 626 | { |
| 627 | struct sctp_m2ua_conn *conn, *tmp; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 628 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 629 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 630 | /* TODO: only connection that use the current link index! */ |
| 631 | llist_for_each_entry_safe(conn, tmp, &link->transport->conns, entry) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 632 | m2ua_conn_destroy(conn); |
| 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 637 | struct sctp_m2ua_transport *sctp_m2ua_transp_create(const char *ip, int port) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 638 | { |
| 639 | int sctp; |
| 640 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 641 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 642 | |
| 643 | sctp = socket(PF_INET, SOCK_STREAM, IPPROTO_SCTP); |
| 644 | if (!sctp) { |
| 645 | LOGP(DINP, LOGL_ERROR, "Failed to create socket.\n"); |
| 646 | return NULL; |
| 647 | } |
| 648 | |
| 649 | memset(&addr, 0, sizeof(addr)); |
| 650 | addr.sin_family = AF_INET; |
| 651 | addr.sin_port = htons(port); |
| 652 | addr.sin_addr.s_addr = inet_addr(ip); |
| 653 | |
| 654 | if (bind(sctp, (struct sockaddr *) &addr, sizeof(addr)) != 0) { |
| 655 | LOGP(DINP, LOGL_ERROR, "Failed to bind.\n"); |
| 656 | close(sctp); |
| 657 | return NULL; |
| 658 | } |
| 659 | |
| 660 | if (listen(sctp, 1) != 0) { |
| 661 | LOGP(DINP, LOGL_ERROR, "Failed to listen.\n"); |
| 662 | close(sctp); |
| 663 | return NULL; |
| 664 | } |
| 665 | |
| 666 | int on = 1; |
| 667 | setsockopt(sctp, SOL_SCTP, 112, &on, sizeof(on)); |
| 668 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 669 | trans = talloc_zero(NULL, struct sctp_m2ua_transport); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 670 | if (!trans) { |
| 671 | LOGP(DINP, LOGL_ERROR, "Remove the talloc.\n"); |
| 672 | close(sctp); |
| 673 | return NULL; |
| 674 | } |
| 675 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 676 | trans->bsc.fd = sctp; |
| 677 | trans->bsc.data = trans; |
| 678 | trans->bsc.cb = sctp_trans_accept; |
| 679 | trans->bsc.when = BSC_FD_READ; |
| 680 | |
| 681 | if (bsc_register_fd(&trans->bsc) != 0) { |
| 682 | LOGP(DINP, LOGL_ERROR, "Failed to register the fd.\n"); |
| 683 | talloc_free(trans); |
| 684 | close(sctp); |
| 685 | return NULL; |
| 686 | } |
| 687 | |
| 688 | INIT_LLIST_HEAD(&trans->conns); |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 689 | INIT_LLIST_HEAD(&trans->links); |
| 690 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 691 | return trans; |
| 692 | } |
| 693 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 694 | struct mtp_m2ua_link *mtp_m2ua_link_create(struct mtp_link_set *set) |
| 695 | { |
| 696 | struct mtp_m2ua_link *lnk; |
| 697 | |
| 698 | lnk = talloc_zero(set, struct mtp_m2ua_link); |
| 699 | if (!lnk) { |
| 700 | LOGP(DINP, LOGL_ERROR, "Failed to allocate.\n"); |
| 701 | return NULL; |
| 702 | } |
| 703 | |
| 704 | /* remember we have a link here */ |
| 705 | llist_add(&lnk->entry, &set->bsc->m2ua_trans->links); |
| 706 | |
| 707 | lnk->base.shutdown = sctp_m2ua_reset; |
| 708 | lnk->base.clear_queue = sctp_m2ua_dummy; |
| 709 | lnk->base.reset = sctp_m2ua_reset; |
| 710 | lnk->base.start = sctp_m2ua_start; |
| 711 | lnk->base.write = sctp_m2ua_write; |
| 712 | |
| 713 | lnk->transport = set->bsc->m2ua_trans; |
| 714 | return lnk; |
| 715 | } |