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 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 25 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 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 | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 33 | #define SCTP_PPID_M2UA 2 |
| 34 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 35 | static struct mtp_m2ua_link *find_m2ua_link(struct sctp_m2ua_transport *trans, int link_index) |
| 36 | { |
| 37 | struct mtp_m2ua_link *link; |
| 38 | link_index = link_index; |
| 39 | |
| 40 | llist_for_each_entry(link, &trans->links, entry) { |
| 41 | if (link->link_index == link_index) |
| 42 | return link; |
| 43 | } |
| 44 | |
| 45 | return NULL; |
| 46 | } |
| 47 | |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 48 | static void link_down(struct mtp_link *link) |
| 49 | { |
| 50 | rate_ctr_inc(&link->ctrg->ctr[MTP_LNK_ERROR]); |
| 51 | mtp_link_down(link); |
| 52 | } |
| 53 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 54 | static void m2ua_conn_destroy(struct sctp_m2ua_conn *conn) |
| 55 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 56 | struct mtp_m2ua_link *link; |
| 57 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 58 | close(conn->queue.bfd.fd); |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 59 | osmo_fd_unregister(&conn->queue.bfd); |
| 60 | osmo_wqueue_clear(&conn->queue); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 61 | llist_del(&conn->entry); |
| 62 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 63 | llist_for_each_entry(link, &conn->trans->links, entry) { |
| 64 | if (link->conn != conn) |
| 65 | continue; |
| 66 | |
| 67 | if (link->established) |
| 68 | link_down(link->base); |
| 69 | link->established = 0; |
| 70 | link->asp_active = 0; |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 71 | link->active = 0; |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 72 | link->conn = NULL; |
| 73 | } |
| 74 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 75 | talloc_free(conn); |
| 76 | |
| 77 | #warning "Notify any other AS(P) for failover scenario" |
| 78 | } |
| 79 | |
| 80 | static int m2ua_conn_send(struct sctp_m2ua_conn *conn, |
| 81 | struct m2ua_msg *m2ua, |
| 82 | struct sctp_sndrcvinfo *info) |
| 83 | { |
| 84 | struct msgb *msg; |
| 85 | msg = m2ua_to_msg(m2ua); |
| 86 | if (!msg) |
| 87 | return -1; |
| 88 | |
| 89 | /* save the OOB data in front of the message */ |
| 90 | msg->l2h = msg->data; |
| 91 | msgb_push(msg, sizeof(*info)); |
| 92 | memcpy(msg->data, info, sizeof(*info)); |
| 93 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 94 | if (osmo_wqueue_enqueue(&conn->queue, msg) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 95 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue.\n"); |
| 96 | msgb_free(msg); |
| 97 | return -1; |
| 98 | } |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 103 | static int m2ua_conn_send_ntfy(struct mtp_m2ua_link *link, |
| 104 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 105 | struct sctp_sndrcvinfo *info) |
| 106 | { |
| 107 | struct m2ua_msg *msg; |
| 108 | uint16_t state[2]; |
Holger Hans Peter Freyther | 41df6c5 | 2011-02-17 03:30:22 +0100 | [diff] [blame] | 109 | uint32_t ident; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 110 | int rc; |
| 111 | |
| 112 | msg = m2ua_msg_alloc(); |
| 113 | if (!msg) |
| 114 | return -1; |
| 115 | msg->hdr.msg_class = M2UA_CLS_MGMT; |
| 116 | msg->hdr.msg_type = M2UA_MGMT_NTFY; |
| 117 | |
| 118 | /* state change */ |
| 119 | state[0] = ntohs(M2UA_STP_AS_STATE_CHG); |
| 120 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 121 | if (link->asp_active) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 122 | state[1] = ntohs(M2UA_STP_AS_ACTIVE); |
| 123 | else |
| 124 | state[1] = ntohs(M2UA_STP_AS_INACTIVE); |
| 125 | |
| 126 | m2ua_msg_add_data(msg, MUA_TAG_STATUS, 4, (uint8_t *) state); |
| 127 | m2ua_msg_add_data(msg, MUA_TAG_ASP_IDENT, 4, conn->asp_ident); |
Holger Hans Peter Freyther | 41df6c5 | 2011-02-17 03:30:22 +0100 | [diff] [blame] | 128 | |
| 129 | ident = htonl(link->link_index); |
| 130 | m2ua_msg_add_data(msg, MUA_TAG_IDENT_INT, 4, (uint8_t *) &ident); |
| 131 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 132 | rc = m2ua_conn_send(conn, msg, info); |
| 133 | m2ua_msg_free(msg); |
| 134 | |
| 135 | return rc; |
| 136 | } |
| 137 | |
| 138 | static int m2ua_handle_asp_ack(struct sctp_m2ua_conn *conn, |
| 139 | struct m2ua_msg *m2ua, |
| 140 | struct sctp_sndrcvinfo *info) |
| 141 | { |
| 142 | struct m2ua_msg_part *asp_ident; |
| 143 | struct m2ua_msg *ack; |
| 144 | |
| 145 | asp_ident = m2ua_msg_find_tag(m2ua, MUA_TAG_ASP_IDENT); |
| 146 | if (!asp_ident) { |
| 147 | LOGP(DINP, LOGL_ERROR, "ASP UP lacks ASP IDENT\n"); |
| 148 | return -1; |
| 149 | } |
| 150 | if (asp_ident->len != 4) { |
| 151 | LOGP(DINP, LOGL_ERROR, "ASP Ident needs to be four byte.\n"); |
| 152 | return -1; |
| 153 | } |
| 154 | |
| 155 | /* TODO: Better handling for fail over is needed here */ |
| 156 | ack = m2ua_msg_alloc(); |
| 157 | if (!ack) { |
| 158 | LOGP(DINP, LOGL_ERROR, "Failed to create response\n"); |
| 159 | return -1; |
| 160 | } |
| 161 | |
| 162 | ack->hdr.msg_class = M2UA_CLS_ASPSM; |
| 163 | ack->hdr.msg_type = M2UA_ASPSM_UP_ACK; |
| 164 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 165 | m2ua_msg_free(ack); |
| 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | memcpy(conn->asp_ident, asp_ident->dat, 4); |
| 170 | conn->asp_up = 1; |
| 171 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 172 | m2ua_msg_free(ack); |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static int m2ua_handle_asp(struct sctp_m2ua_conn *conn, |
| 177 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 178 | { |
| 179 | switch (m2ua->hdr.msg_type) { |
| 180 | case M2UA_ASPSM_UP: |
| 181 | m2ua_handle_asp_ack(conn, m2ua, info); |
| 182 | break; |
| 183 | default: |
| 184 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 185 | m2ua->hdr.msg_type); |
| 186 | break; |
| 187 | } |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 192 | static int m2ua_handle_asptm_act(struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 193 | struct m2ua_msg *m2ua, |
| 194 | struct sctp_sndrcvinfo *info) |
| 195 | { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 196 | struct m2ua_msg_part *part; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 197 | struct m2ua_msg *ack; |
| 198 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 199 | ack = m2ua_msg_alloc(); |
| 200 | if (!ack) |
| 201 | return -1; |
| 202 | |
| 203 | ack->hdr.msg_class = M2UA_CLS_ASPTM; |
| 204 | ack->hdr.msg_type = M2UA_ASPTM_ACTIV_ACK; |
| 205 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 206 | /* |
| 207 | * Move things over to this connection now. |
| 208 | */ |
| 209 | llist_for_each_entry(part, &m2ua->headers, entry) { |
| 210 | struct mtp_m2ua_link *link; |
| 211 | uint32_t interf; |
| 212 | |
| 213 | |
| 214 | if (part->tag != MUA_TAG_IDENT_INT) |
| 215 | continue; |
| 216 | if (part->len != 4) |
| 217 | continue; |
| 218 | |
| 219 | memcpy(&interf, part->dat, 4); |
| 220 | link = find_m2ua_link(conn->trans, ntohl(interf)); |
| 221 | if (!link) { |
| 222 | LOGP(DINP, LOGL_ERROR, |
| 223 | "M2UA Link index %d is not configured.\n", ntohl(interf)); |
| 224 | continue; |
| 225 | } |
| 226 | |
| 227 | link->conn = conn; |
| 228 | link->asp_active = 1; |
| 229 | m2ua_msg_add_data(ack, MUA_TAG_IDENT_INT, 4, (uint8_t *) &interf); |
| 230 | } |
| 231 | |
| 232 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 233 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 234 | m2ua_msg_free(ack); |
| 235 | return -1; |
| 236 | } |
| 237 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 238 | /* now again send NTFY on all these links */ |
| 239 | llist_for_each_entry(part, &m2ua->headers, entry) { |
| 240 | struct mtp_m2ua_link *link; |
| 241 | uint32_t interf; |
| 242 | |
| 243 | |
| 244 | if (part->tag != MUA_TAG_IDENT_INT) |
| 245 | continue; |
| 246 | if (part->len != 4) |
| 247 | continue; |
| 248 | |
| 249 | memcpy(&interf, part->dat, 4); |
| 250 | link = find_m2ua_link(conn->trans, ntohl(interf)); |
| 251 | if (!link) |
| 252 | continue; |
| 253 | m2ua_conn_send_ntfy(link, conn, info); |
| 254 | } |
| 255 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 256 | m2ua_msg_free(ack); |
| 257 | return 0; |
| 258 | } |
| 259 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 260 | static int m2ua_handle_asptm(struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 261 | struct m2ua_msg *m2ua, |
| 262 | struct sctp_sndrcvinfo *info) |
| 263 | { |
| 264 | switch (m2ua->hdr.msg_type) { |
| 265 | case M2UA_ASPTM_ACTIV: |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 266 | m2ua_handle_asptm_act(conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 267 | break; |
| 268 | default: |
| 269 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 270 | m2ua->hdr.msg_type); |
| 271 | break; |
| 272 | } |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 277 | static int m2ua_handle_state_req(struct mtp_m2ua_link *link, |
| 278 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 279 | struct m2ua_msg *m2ua, |
| 280 | struct sctp_sndrcvinfo *info) |
| 281 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 282 | struct m2ua_msg_part *state; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 283 | struct m2ua_msg *conf; |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 284 | uint32_t index; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 285 | int req; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 286 | |
Holger Hans Peter Freyther | 5960ba3 | 2011-03-02 21:56:03 +0100 | [diff] [blame] | 287 | /* fixup for a broken MSC */ |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 288 | if (link->conn != conn) { |
Holger Hans Peter Freyther | 5960ba3 | 2011-03-02 21:56:03 +0100 | [diff] [blame] | 289 | if (!link->conn) { |
| 290 | LOGP(DINP, LOGL_NOTICE, |
| 291 | "No ASP Activate but no connection is on link-index %d.\n", |
| 292 | link->link_index); |
| 293 | link->conn = conn; |
| 294 | link->asp_active = 1; |
| 295 | } else { |
| 296 | LOGP(DINP, LOGL_ERROR, |
| 297 | "Someone forgot the ASP Activate on link-index %d\n", |
| 298 | link->link_index); |
| 299 | return -1; |
| 300 | } |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 301 | } |
| 302 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 303 | state = m2ua_msg_find_tag(m2ua, M2UA_TAG_STATE_REQ); |
| 304 | if (!state || state->len != 4) { |
| 305 | LOGP(DINP, LOGL_ERROR, "Mandantory state request not present.\n"); |
| 306 | return -1; |
| 307 | } |
| 308 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 309 | memcpy(&req, state->dat, 4); |
| 310 | req = ntohl(req); |
| 311 | |
| 312 | switch (req) { |
| 313 | case M2UA_STATUS_EMER_SET: |
| 314 | conf = m2ua_msg_alloc(); |
| 315 | if (!conf) |
| 316 | return -1; |
| 317 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 318 | index = htonl(link->link_index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 319 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 320 | conf->hdr.msg_type = M2UA_MAUP_STATE_CON; |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 321 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 322 | m2ua_msg_add_data(conf, M2UA_TAG_STATE_REQ, 4, (uint8_t *) &req); |
| 323 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 324 | m2ua_msg_free(conf); |
| 325 | return -1; |
| 326 | } |
| 327 | m2ua_msg_free(conf); |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 328 | |
| 329 | LOGP(DINP, LOGL_NOTICE, "M2UA link-index %d is running.\n", link->link_index); |
| 330 | link->active = 1; |
| 331 | mtp_link_up(link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 332 | break; |
| 333 | default: |
| 334 | LOGP(DINP, LOGL_ERROR, "Unknown STATE Request: %d\n", req); |
| 335 | break; |
| 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 341 | static int m2ua_handle_est_req(struct mtp_m2ua_link *link, |
| 342 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 343 | struct m2ua_msg *m2ua, |
| 344 | struct sctp_sndrcvinfo *info) |
| 345 | { |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 346 | uint32_t index; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 347 | struct m2ua_msg *conf; |
| 348 | |
| 349 | conf = m2ua_msg_alloc(); |
| 350 | if (!conf) |
| 351 | return -1; |
| 352 | |
| 353 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 354 | conf->hdr.msg_type = M2UA_MAUP_EST_CON; |
| 355 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 356 | index = htonl(link->link_index); |
| 357 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
| 358 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 359 | if (m2ua_conn_send(conn, conf, info) != 0) { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 360 | link->established = 0; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 361 | m2ua_msg_free(conf); |
| 362 | return -1; |
| 363 | } |
| 364 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 365 | link->established = 1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 366 | m2ua_msg_free(conf); |
| 367 | return 0; |
| 368 | } |
| 369 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 370 | static int m2ua_handle_rel_req(struct mtp_m2ua_link *link, |
| 371 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 372 | struct m2ua_msg *m2ua, |
| 373 | struct sctp_sndrcvinfo *info) |
| 374 | { |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 375 | uint32_t index; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 376 | struct m2ua_msg *conf; |
| 377 | |
| 378 | conf = m2ua_msg_alloc(); |
| 379 | if (!conf) |
| 380 | return -1; |
| 381 | |
| 382 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 383 | conf->hdr.msg_type = M2UA_MAUP_REL_CON; |
| 384 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 385 | index = htonl(link->link_index); |
| 386 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
| 387 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 388 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 389 | m2ua_msg_free(conf); |
| 390 | return -1; |
| 391 | } |
| 392 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 393 | link->established = 0; |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 394 | link->active = 0; |
Holger Hans Peter Freyther | 123147a | 2011-03-03 00:58:44 +0100 | [diff] [blame] | 395 | LOGP(DINP, LOGL_NOTICE, "M2UA/Link link-index %d is released.\n", link->link_index); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 396 | link_down(link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 397 | m2ua_msg_free(conf); |
| 398 | return 0; |
| 399 | } |
| 400 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 401 | static int m2ua_handle_data(struct mtp_m2ua_link *_link, |
| 402 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 403 | struct m2ua_msg *m2ua, |
| 404 | struct sctp_sndrcvinfo *info) |
| 405 | { |
| 406 | struct msgb *msg; |
| 407 | struct m2ua_msg_part *data; |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 408 | struct mtp_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 409 | |
| 410 | data = m2ua_msg_find_tag(m2ua, M2UA_TAG_DATA); |
| 411 | if (!data) { |
| 412 | LOGP(DINP, LOGL_ERROR, "No DATA in DATA message.\n"); |
| 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | if (data->len > 2048) { |
| 417 | LOGP(DINP, LOGL_ERROR, "TOO much data for us to handle.\n"); |
| 418 | return -1; |
| 419 | } |
| 420 | |
| 421 | msg = msgb_alloc(2048, "m2ua-data"); |
| 422 | if (!msg) { |
| 423 | LOGP(DINP, LOGL_ERROR, "Failed to allocate storage.\n"); |
| 424 | return -1; |
| 425 | } |
| 426 | |
| 427 | msg->l2h = msgb_put(msg, data->len); |
| 428 | memcpy(msg->l2h, data->dat, data->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 429 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 430 | link = _link->base; |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 431 | if (!link->blocked) { |
| 432 | mtp_handle_pcap(link, NET_IN, msg->l2h, msgb_l2len(msg)); |
| 433 | mtp_link_set_data(link, msg); |
| 434 | } |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 435 | msgb_free(msg); |
| 436 | |
| 437 | return 0; |
| 438 | } |
| 439 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 440 | static int m2ua_handle_maup(struct mtp_m2ua_link *link, |
| 441 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 442 | struct m2ua_msg *m2ua, |
| 443 | struct sctp_sndrcvinfo *info) |
| 444 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 445 | if (!link) { |
| 446 | LOGP(DINP, LOGL_ERROR, "Link is required.\n"); |
| 447 | return -1; |
| 448 | } |
| 449 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 450 | if (link->conn != conn) { |
| 451 | LOGP(DINP, LOGL_ERROR, |
| 452 | "Someone forgot the ASP Activate on link-index %d\n", |
| 453 | link->link_index); |
| 454 | return -1; |
| 455 | } |
| 456 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 457 | switch (m2ua->hdr.msg_type) { |
| 458 | case M2UA_MAUP_STATE_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 459 | m2ua_handle_state_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 460 | break; |
| 461 | case M2UA_MAUP_EST_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 462 | m2ua_handle_est_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 463 | break; |
| 464 | case M2UA_MAUP_REL_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 465 | m2ua_handle_rel_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 466 | break; |
| 467 | case M2UA_MAUP_DATA: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 468 | m2ua_handle_data(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 469 | break; |
| 470 | default: |
| 471 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 472 | m2ua->hdr.msg_type); |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static int m2ua_handle_mgmt(struct sctp_m2ua_conn *conn, |
| 480 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 481 | { |
| 482 | switch (m2ua->hdr.msg_type) { |
| 483 | case M2UA_MGMT_ERROR: |
| 484 | LOGP(DINP, LOGL_ERROR, "We did something wrong. Error...\n"); |
| 485 | break; |
| 486 | case M2UA_MGMT_NTFY: |
| 487 | LOGP(DINP, LOGL_NOTICE, "There was a notiy.. but we should only send it.\n"); |
| 488 | break; |
| 489 | } |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 494 | static int m2ua_find_interface(struct m2ua_msg *m2ua, int def) |
| 495 | { |
| 496 | struct m2ua_msg_part *ident; |
| 497 | |
| 498 | ident = m2ua_msg_find_tag(m2ua, MUA_TAG_IDENT_INT); |
| 499 | if (ident && ident->len == 4) { |
| 500 | memcpy(&def, ident->dat, 4); |
| 501 | def = ntohl(def); |
| 502 | } |
| 503 | |
| 504 | return def; |
| 505 | } |
| 506 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 507 | static int m2ua_conn_handle(struct sctp_m2ua_conn *conn, |
| 508 | struct msgb *msg, struct sctp_sndrcvinfo *info) |
| 509 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 510 | struct mtp_m2ua_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 511 | struct m2ua_msg *m2ua; |
| 512 | m2ua = m2ua_from_msg(msg->len, msg->data); |
| 513 | if (!m2ua) { |
| 514 | LOGP(DINP, LOGL_ERROR, "Failed to parse the message.\n"); |
| 515 | return -1; |
| 516 | } |
| 517 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 518 | link = find_m2ua_link(conn->trans, m2ua_find_interface(m2ua, 0)); |
| 519 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 520 | switch (m2ua->hdr.msg_class) { |
| 521 | case M2UA_CLS_MGMT: |
| 522 | m2ua_handle_mgmt(conn, m2ua, info); |
| 523 | break; |
| 524 | case M2UA_CLS_ASPSM: |
| 525 | m2ua_handle_asp(conn, m2ua, info); |
| 526 | break; |
| 527 | case M2UA_CLS_ASPTM: |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 528 | m2ua_handle_asptm(conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 529 | break; |
| 530 | case M2UA_CLS_MAUP: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 531 | m2ua_handle_maup(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 532 | break; |
| 533 | default: |
| 534 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_class %d\n", |
| 535 | m2ua->hdr.msg_class); |
| 536 | break; |
| 537 | } |
| 538 | |
| 539 | m2ua_msg_free(m2ua); |
| 540 | return 0; |
| 541 | } |
| 542 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 543 | static int m2ua_conn_read(struct osmo_fd *fd) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 544 | { |
| 545 | struct sockaddr_in addr; |
| 546 | struct sctp_sndrcvinfo info; |
| 547 | socklen_t len = sizeof(addr); |
| 548 | struct msgb *msg; |
| 549 | int rc; |
| 550 | |
| 551 | msg = msgb_alloc(2048, "m2ua buffer"); |
| 552 | if (!msg) { |
| 553 | LOGP(DINP, LOGL_ERROR, "Failed to allocate buffer.\n"); |
| 554 | m2ua_conn_destroy(fd->data); |
| 555 | return -1; |
| 556 | } |
| 557 | |
| 558 | memset(&info, 0, sizeof(info)); |
| 559 | memset(&addr, 0, sizeof(addr)); |
| 560 | rc = sctp_recvmsg(fd->fd, msg->data, msg->data_len, |
| 561 | (struct sockaddr *) &addr, &len, &info, NULL); |
Holger Hans Peter Freyther | c5562bd | 2011-01-26 11:02:42 +0100 | [diff] [blame] | 562 | if (rc <= 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 563 | LOGP(DINP, LOGL_ERROR, "Failed to read.\n"); |
Holger Hans Peter Freyther | a2938fe | 2011-02-25 19:48:24 +0100 | [diff] [blame] | 564 | msgb_free(msg); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 565 | m2ua_conn_destroy(fd->data); |
| 566 | return -1; |
| 567 | } |
| 568 | |
Holger Hans Peter Freyther | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 569 | if (ntohl(info.sinfo_ppid) != SCTP_PPID_M2UA) { |
| 570 | LOGP(DINP, LOGL_ERROR, "Only M2UA is allowed on this socket.\n"); |
| 571 | msgb_free(msg); |
| 572 | return -1; |
| 573 | } |
| 574 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 575 | msgb_put(msg, rc); |
Holger Hans Peter Freyther | 5e5758c | 2011-02-17 18:18:22 +0100 | [diff] [blame] | 576 | LOGP(DINP, LOGL_DEBUG, "Read %d on stream: %d ssn: %d assoc: %d\n", |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 577 | rc, info.sinfo_stream, info.sinfo_ssn, info.sinfo_assoc_id); |
| 578 | m2ua_conn_handle(fd->data, msg, &info); |
| 579 | msgb_free(msg); |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | static int sctp_m2ua_write(struct mtp_link *link, struct msgb *msg) |
| 584 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 585 | struct mtp_m2ua_link *mlink; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 586 | struct sctp_sndrcvinfo info; |
| 587 | struct m2ua_msg *m2ua; |
| 588 | uint32_t interface; |
| 589 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 590 | mlink = (struct mtp_m2ua_link *) link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 591 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 592 | |
| 593 | if (!mlink->conn) { |
| 594 | LOGP(DINP, LOGL_ERROR, "M2UA write with no ASP for %d/%s of %d/%s.\n", |
| 595 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 596 | goto clean; |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 597 | } |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 598 | |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 599 | if (!mlink->asp_active || !mlink->established || !mlink->active) { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 600 | LOGP(DINP, LOGL_ERROR, "ASP not ready for %d/%s of %d/%s.\n", |
| 601 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 602 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | m2ua = m2ua_msg_alloc(); |
| 606 | if (!m2ua) |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 607 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 608 | |
Holger Hans Peter Freyther | 36260e9 | 2011-01-22 17:37:56 +0100 | [diff] [blame] | 609 | mtp_handle_pcap(link, NET_OUT, msg->data, msg->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 610 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 611 | m2ua->hdr.msg_class = M2UA_CLS_MAUP; |
| 612 | m2ua->hdr.msg_type = M2UA_MAUP_DATA; |
| 613 | |
Holger Hans Peter Freyther | 7e8ee3a | 2011-03-02 22:00:24 +0100 | [diff] [blame] | 614 | interface = htonl(mlink->link_index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 615 | m2ua_msg_add_data(m2ua, MUA_TAG_IDENT_INT, 4, (uint8_t *) &interface); |
| 616 | m2ua_msg_add_data(m2ua, M2UA_TAG_DATA, msg->len, msg->data); |
| 617 | |
| 618 | memset(&info, 0, sizeof(info)); |
| 619 | info.sinfo_stream = 1; |
| 620 | info.sinfo_assoc_id = 1; |
Holger Hans Peter Freyther | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 621 | info.sinfo_ppid = htonl(SCTP_PPID_M2UA); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 622 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 623 | m2ua_conn_send(mlink->conn, m2ua, &info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 624 | m2ua_msg_free(m2ua); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 625 | |
| 626 | clean: |
| 627 | msgb_free(msg); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 628 | return 0; |
| 629 | } |
| 630 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 631 | static int m2ua_conn_write(struct osmo_fd *fd, struct msgb *msg) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 632 | { |
| 633 | int ret; |
| 634 | struct sctp_sndrcvinfo info; |
| 635 | memcpy(&info, msg->data, sizeof(info)); |
| 636 | |
| 637 | ret = sctp_send(fd->fd, msg->l2h, msgb_l2len(msg), |
| 638 | &info, 0); |
| 639 | |
| 640 | if (ret != msgb_l2len(msg)) |
| 641 | LOGP(DINP, LOGL_ERROR, "Failed to send %d.\n", ret); |
| 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 646 | static int sctp_trans_accept(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 647 | { |
| 648 | struct sctp_event_subscribe events; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 649 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 650 | struct sctp_m2ua_conn *conn; |
| 651 | struct sockaddr_in addr; |
| 652 | socklen_t len; |
Holger Hans Peter Freyther | 0e6cbc6 | 2011-02-25 19:42:51 +0100 | [diff] [blame] | 653 | int s, ret; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 654 | |
| 655 | len = sizeof(addr); |
| 656 | s = accept(fd->fd, (struct sockaddr *) &addr, &len); |
| 657 | if (s < 0) { |
| 658 | LOGP(DINP, LOGL_ERROR, "Failed to accept.\n"); |
| 659 | return -1; |
| 660 | } |
| 661 | |
| 662 | trans = fd->data; |
| 663 | if (!trans->started) { |
| 664 | LOGP(DINP, LOGL_NOTICE, "The link is not started.\n"); |
| 665 | close(s); |
| 666 | return -1; |
| 667 | } |
| 668 | |
Holger Hans Peter Freyther | 0e6cbc6 | 2011-02-25 19:42:51 +0100 | [diff] [blame] | 669 | memset(&events, 0, sizeof(events)); |
| 670 | events.sctp_data_io_event = 1; |
| 671 | ret = setsockopt(s, SOL_SCTP, SCTP_EVENTS, &events, sizeof(events)); |
| 672 | if (ret != 0) { |
| 673 | LOGP(DINP, LOGL_ERROR, "Failed to enable SCTP Events. Closing socket.\n"); |
| 674 | close(s); |
| 675 | return -1; |
| 676 | } |
| 677 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 678 | LOGP(DINP, LOGL_NOTICE, "Got a new SCTP connection.\n"); |
| 679 | conn = talloc_zero(fd->data, struct sctp_m2ua_conn); |
| 680 | if (!conn) { |
| 681 | LOGP(DINP, LOGL_ERROR, "Failed to create.\n"); |
| 682 | close(s); |
| 683 | return -1; |
| 684 | } |
| 685 | |
| 686 | conn->trans = trans; |
| 687 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 688 | osmo_wqueue_init(&conn->queue, 10); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 689 | conn->queue.bfd.fd = s; |
| 690 | conn->queue.bfd.data = conn; |
| 691 | conn->queue.bfd.when = BSC_FD_READ; |
| 692 | conn->queue.read_cb = m2ua_conn_read; |
| 693 | conn->queue.write_cb = m2ua_conn_write; |
| 694 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 695 | if (osmo_fd_register(&conn->queue.bfd) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 696 | LOGP(DINP, LOGL_ERROR, "Failed to register.\n"); |
| 697 | close(s); |
| 698 | talloc_free(conn); |
| 699 | return -1; |
| 700 | } |
| 701 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 702 | llist_add_tail(&conn->entry, &trans->conns); |
| 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | static int sctp_m2ua_dummy(struct mtp_link *link) |
| 707 | { |
| 708 | return 0; |
| 709 | } |
| 710 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 711 | static int sctp_m2ua_start(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 712 | { |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 713 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 714 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 715 | link->transport->started = 1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 716 | return 0; |
| 717 | } |
| 718 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 719 | static int sctp_m2ua_reset(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 720 | { |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 721 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 722 | |
Holger Hans Peter Freyther | 7c6feca | 2011-02-17 15:15:28 +0100 | [diff] [blame] | 723 | /* |
| 724 | * TODO: Send a Release Indication? Send NTFY to other ASPs to |
| 725 | * ask them to activate the link? What should we do here? Right |
| 726 | * now do exactly nothing. |
| 727 | */ |
| 728 | LOGP(DINP, LOGL_ERROR, |
| 729 | "M2UA link-index %d not doing the reset.\n", link->link_index); |
| 730 | |
| 731 | if (link->conn && link->asp_active && link->established) |
| 732 | mtp_link_start_link_test(_link); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 733 | |
| 734 | return 0; |
| 735 | } |
| 736 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 737 | struct sctp_m2ua_transport *sctp_m2ua_transp_create(struct bsc_data *bsc) |
| 738 | { |
| 739 | struct sctp_m2ua_transport *trans; |
| 740 | |
| 741 | trans = talloc_zero(bsc, struct sctp_m2ua_transport); |
| 742 | if (!trans) { |
| 743 | LOGP(DINP, LOGL_ERROR, "Remove the talloc.\n"); |
| 744 | return NULL; |
| 745 | } |
| 746 | |
| 747 | INIT_LLIST_HEAD(&trans->conns); |
| 748 | INIT_LLIST_HEAD(&trans->links); |
| 749 | |
| 750 | |
| 751 | return trans; |
| 752 | } |
| 753 | |
| 754 | int sctp_m2ua_transport_bind(struct sctp_m2ua_transport *trans, |
| 755 | const char *ip, int port) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 756 | { |
| 757 | int sctp; |
| 758 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 759 | |
| 760 | sctp = socket(PF_INET, SOCK_STREAM, IPPROTO_SCTP); |
| 761 | if (!sctp) { |
| 762 | LOGP(DINP, LOGL_ERROR, "Failed to create socket.\n"); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 763 | return -1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | memset(&addr, 0, sizeof(addr)); |
| 767 | addr.sin_family = AF_INET; |
| 768 | addr.sin_port = htons(port); |
| 769 | addr.sin_addr.s_addr = inet_addr(ip); |
| 770 | |
| 771 | if (bind(sctp, (struct sockaddr *) &addr, sizeof(addr)) != 0) { |
| 772 | LOGP(DINP, LOGL_ERROR, "Failed to bind.\n"); |
| 773 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 774 | return -2; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 775 | } |
| 776 | |
| 777 | if (listen(sctp, 1) != 0) { |
| 778 | LOGP(DINP, LOGL_ERROR, "Failed to listen.\n"); |
| 779 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 780 | return -3; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | int on = 1; |
| 784 | setsockopt(sctp, SOL_SCTP, 112, &on, sizeof(on)); |
| 785 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 786 | trans->bsc.fd = sctp; |
| 787 | trans->bsc.data = trans; |
| 788 | trans->bsc.cb = sctp_trans_accept; |
| 789 | trans->bsc.when = BSC_FD_READ; |
| 790 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame^] | 791 | if (osmo_fd_register(&trans->bsc) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 792 | LOGP(DINP, LOGL_ERROR, "Failed to register the fd.\n"); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 793 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 794 | return -4; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 795 | } |
| 796 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 797 | return 0; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 798 | } |
| 799 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 800 | struct mtp_m2ua_link *mtp_m2ua_link_init(struct mtp_link *blnk) |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 801 | { |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 802 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 803 | struct mtp_m2ua_link *lnk; |
| 804 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 805 | lnk = talloc_zero(blnk, struct mtp_m2ua_link); |
| 806 | if (!lnk) { |
| 807 | LOGP(DINP, LOGL_ERROR, "Failed to allocate.\n"); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 808 | return NULL; |
| 809 | } |
| 810 | |
| 811 | /* make sure we can resolve it both ways */ |
| 812 | lnk->base = blnk; |
| 813 | blnk->data = lnk; |
| 814 | blnk->type = SS7_LTYPE_M2UA; |
| 815 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 816 | /* remember we have a link here */ |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 817 | trans = blnk->set->bsc->m2ua_trans; |
Holger Hans Peter Freyther | 169a1a9 | 2011-02-22 15:45:52 +0100 | [diff] [blame] | 818 | llist_add_tail(&lnk->entry, &trans->links); |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 819 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 820 | lnk->base->shutdown = sctp_m2ua_reset; |
| 821 | lnk->base->clear_queue = sctp_m2ua_dummy; |
| 822 | lnk->base->reset = sctp_m2ua_reset; |
| 823 | lnk->base->start = sctp_m2ua_start; |
| 824 | lnk->base->write = sctp_m2ua_write; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 825 | |
Holger Hans Peter Freyther | b27c962 | 2011-02-16 23:47:25 +0100 | [diff] [blame] | 826 | lnk->transport = trans; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 827 | return lnk; |
| 828 | } |