Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) 2012-2013 by Pablo Neira Ayuso <pablo@gnumonks.org> |
| 3 | * (C) 2012-2013 by On Waves ehf <http://www.on-waves.com> |
| 4 | * All rights not specifically granted under this license are reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU Affero General Public License as published by the |
| 8 | * Free Software Foundation; either version 3 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #include <stdio.h> /* for printf */ |
| 13 | #include <string.h> /* for memcpy */ |
| 14 | #include <stdlib.h> /* for abs */ |
| 15 | #include <inttypes.h> /* for PRIu64 */ |
| 16 | #include <netinet/in.h> |
| 17 | #include <osmocom/core/msgb.h> |
Pau Espin Pedrol | f027f17 | 2019-05-06 13:57:31 +0200 | [diff] [blame] | 18 | #include <osmocom/core/socket.h> |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 19 | #include <osmocom/core/talloc.h> |
| 20 | |
| 21 | #include <osmocom/netif/osmux.h> |
| 22 | #include <osmocom/netif/rtp.h> |
Pau Espin Pedrol | c1ad553 | 2019-05-15 23:00:53 +0200 | [diff] [blame] | 23 | #include <osmocom/netif/amr.h> |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 24 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 25 | #include <osmocom/mgcp/mgcp.h> |
| 26 | #include <osmocom/mgcp/mgcp_internal.h> |
| 27 | #include <osmocom/mgcp/osmux.h> |
| 28 | #include <osmocom/mgcp/mgcp_conn.h> |
Philipp Maier | 37d11c8 | 2018-02-01 14:38:12 +0100 | [diff] [blame] | 29 | #include <osmocom/mgcp/mgcp_endp.h> |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 30 | |
| 31 | static struct osmo_fd osmux_fd; |
| 32 | |
| 33 | static LLIST_HEAD(osmux_handle_list); |
| 34 | |
| 35 | struct osmux_handle { |
| 36 | struct llist_head head; |
| 37 | struct osmux_in_handle *in; |
| 38 | struct in_addr rem_addr; |
Pau Espin Pedrol | 1205686 | 2019-05-13 17:30:21 +0200 | [diff] [blame] | 39 | int rem_port; /* network byte order */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 40 | int refcnt; |
| 41 | }; |
| 42 | |
| 43 | static void *osmux; |
| 44 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 45 | /* Deliver OSMUX batch to the remote end */ |
| 46 | static void osmux_deliver_cb(struct msgb *batch_msg, void *data) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 47 | { |
| 48 | struct osmux_handle *handle = data; |
| 49 | struct sockaddr_in out = { |
| 50 | .sin_family = AF_INET, |
| 51 | .sin_port = handle->rem_port, |
| 52 | }; |
| 53 | |
| 54 | memcpy(&out.sin_addr, &handle->rem_addr, sizeof(handle->rem_addr)); |
| 55 | sendto(osmux_fd.fd, batch_msg->data, batch_msg->len, 0, |
| 56 | (struct sockaddr *)&out, sizeof(out)); |
| 57 | msgb_free(batch_msg); |
| 58 | } |
| 59 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 60 | /* Lookup existing OSMUX handle for specified destination address. */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 61 | static struct osmux_handle * |
| 62 | osmux_handle_find_get(struct in_addr *addr, int rem_port) |
| 63 | { |
| 64 | struct osmux_handle *h; |
| 65 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 66 | llist_for_each_entry(h, &osmux_handle_list, head) { |
| 67 | if (memcmp(&h->rem_addr, addr, sizeof(struct in_addr)) == 0 && |
| 68 | h->rem_port == rem_port) { |
| 69 | LOGP(DLMGCP, LOGL_DEBUG, "using existing OSMUX handle " |
| 70 | "for addr=%s:%d\n", |
| 71 | inet_ntoa(*addr), ntohs(rem_port)); |
| 72 | h->refcnt++; |
| 73 | return h; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | return NULL; |
| 78 | } |
| 79 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 80 | /* Put down no longer needed OSMUX handle */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 81 | static void osmux_handle_put(struct osmux_in_handle *in) |
| 82 | { |
| 83 | struct osmux_handle *h; |
| 84 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 85 | llist_for_each_entry(h, &osmux_handle_list, head) { |
| 86 | if (h->in == in) { |
| 87 | if (--h->refcnt == 0) { |
| 88 | LOGP(DLMGCP, LOGL_INFO, |
| 89 | "Releasing unused osmux handle for %s:%d\n", |
| 90 | inet_ntoa(h->rem_addr), |
| 91 | ntohs(h->rem_port)); |
| 92 | LOGP(DLMGCP, LOGL_INFO, "Stats: " |
| 93 | "input RTP msgs: %u bytes: %"PRIu64" " |
| 94 | "output osmux msgs: %u bytes: %"PRIu64"\n", |
| 95 | in->stats.input_rtp_msgs, |
| 96 | in->stats.input_rtp_bytes, |
| 97 | in->stats.output_osmux_msgs, |
| 98 | in->stats.output_osmux_bytes); |
| 99 | llist_del(&h->head); |
| 100 | osmux_xfrm_input_fini(h->in); |
| 101 | talloc_free(h); |
| 102 | } |
| 103 | return; |
| 104 | } |
| 105 | } |
| 106 | LOGP(DLMGCP, LOGL_ERROR, "cannot find Osmux input handle %p\n", in); |
| 107 | } |
| 108 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 109 | /* Allocate free OSMUX handle */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 110 | static struct osmux_handle * |
| 111 | osmux_handle_alloc(struct mgcp_config *cfg, struct in_addr *addr, int rem_port) |
| 112 | { |
| 113 | struct osmux_handle *h; |
| 114 | |
| 115 | h = talloc_zero(osmux, struct osmux_handle); |
| 116 | if (!h) |
| 117 | return NULL; |
| 118 | h->rem_addr = *addr; |
| 119 | h->rem_port = rem_port; |
| 120 | h->refcnt++; |
| 121 | |
| 122 | h->in = talloc_zero(h, struct osmux_in_handle); |
| 123 | if (!h->in) { |
| 124 | talloc_free(h); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 128 | /* sequence number to start OSMUX message from */ |
| 129 | h->in->osmux_seq = 0; |
| 130 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 131 | h->in->batch_factor = cfg->osmux_batch; |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 132 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 133 | /* If batch size is zero, the library defaults to 1470 bytes. */ |
| 134 | h->in->batch_size = cfg->osmux_batch_size; |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 135 | h->in->deliver = osmux_deliver_cb; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 136 | osmux_xfrm_input_init(h->in); |
| 137 | h->in->data = h; |
| 138 | |
| 139 | llist_add(&h->head, &osmux_handle_list); |
| 140 | |
| 141 | LOGP(DLMGCP, LOGL_DEBUG, "created new OSMUX handle for addr=%s:%d\n", |
| 142 | inet_ntoa(*addr), ntohs(rem_port)); |
| 143 | |
| 144 | return h; |
| 145 | } |
| 146 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 147 | /* Lookup existing handle for a specified address, if the handle can not be |
Harald Welte | 1d1b98f | 2017-12-25 10:03:40 +0100 | [diff] [blame] | 148 | * found, the function will automatically allocate one */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 149 | static struct osmux_in_handle * |
| 150 | osmux_handle_lookup(struct mgcp_config *cfg, struct in_addr *addr, int rem_port) |
| 151 | { |
| 152 | struct osmux_handle *h; |
| 153 | |
| 154 | h = osmux_handle_find_get(addr, rem_port); |
| 155 | if (h != NULL) |
| 156 | return h->in; |
| 157 | |
| 158 | h = osmux_handle_alloc(cfg, addr, rem_port); |
| 159 | if (h == NULL) |
| 160 | return NULL; |
| 161 | |
| 162 | return h->in; |
| 163 | } |
| 164 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 165 | /*! send RTP packet through OSMUX connection. |
| 166 | * \param[in] buf rtp data |
| 167 | * \param[in] buf_len length of rtp data |
| 168 | * \param[in] conn associated RTP connection |
| 169 | * \returns 0 on success, -1 on ERROR */ |
| 170 | int osmux_xfrm_to_osmux(char *buf, int buf_len, struct mgcp_conn_rtp *conn) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 171 | { |
| 172 | int ret; |
| 173 | struct msgb *msg; |
| 174 | |
| 175 | msg = msgb_alloc(4096, "RTP"); |
| 176 | if (!msg) |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 177 | return -1; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 178 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 179 | memcpy(msg->data, buf, buf_len); |
| 180 | msgb_put(msg, buf_len); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 181 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 182 | if (conn->osmux.state != OSMUX_STATE_ENABLED) { |
| 183 | LOGPCONN(conn->conn, DLMGCP, LOGL_INFO, "forwarding RTP to Osmux conn not yet enabled, dropping (cid=%d)\n", |
| 184 | conn->osmux.cid); |
| 185 | return -1; |
| 186 | } |
| 187 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 188 | while ((ret = osmux_xfrm_input(conn->osmux.in, msg, conn->osmux.cid)) > 0) { |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 189 | /* batch full, build and deliver it */ |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 190 | osmux_xfrm_input_deliver(conn->osmux.in); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 191 | } |
| 192 | return 0; |
| 193 | } |
| 194 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 195 | /* Lookup the endpoint that corresponds to the specified address (port) */ |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 196 | static struct mgcp_conn_rtp* |
| 197 | osmux_conn_lookup(struct mgcp_config *cfg, uint8_t cid, |
| 198 | struct in_addr *from_addr) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 199 | { |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 200 | struct mgcp_endpoint *endp; |
| 201 | struct mgcp_conn *conn = NULL; |
| 202 | struct mgcp_conn_rtp * conn_rtp; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 203 | int i; |
| 204 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 205 | for (i=0; i<cfg->trunk.number_endpoints; i++) { |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 206 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 207 | endp = &cfg->trunk.endpoints[i]; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 208 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 209 | llist_for_each_entry(conn, &endp->conns, entry) { |
| 210 | if (conn->type != MGCP_CONN_TYPE_RTP) |
| 211 | continue; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 212 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 213 | conn_rtp = &conn->u.rtp; |
| 214 | if (!mgcp_conn_rtp_is_osmux(conn_rtp)) |
| 215 | continue; |
| 216 | |
| 217 | if (conn_rtp->osmux.cid == cid) |
| 218 | return conn_rtp; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 219 | } |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 220 | } |
| 221 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 222 | LOGP(DLMGCP, LOGL_ERROR, "Cannot find osmux conn with cid=%d\n", cid); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 223 | |
| 224 | return NULL; |
| 225 | } |
| 226 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 227 | /* FIXME: this is declared and used in mgcp_network.c, but documentation of mgcp_dispatch_rtp_bridge_cb() states another enum is to be used */ |
| 228 | enum { |
| 229 | MGCP_PROTO_RTP, |
| 230 | MGCP_PROTO_RTCP, |
| 231 | }; |
| 232 | |
| 233 | static void scheduled_from_osmux_tx_rtp_cb(struct msgb *msg, void *data) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 234 | { |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 235 | struct mgcp_conn_rtp *conn = data; |
| 236 | struct mgcp_endpoint *endp = conn->conn->endp; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 237 | struct sockaddr_in addr = { |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 238 | .sin_addr = conn->end.addr, |
| 239 | .sin_port = conn->end.rtp_port, |
| 240 | }; /* FIXME: not set/used in cb */ |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 241 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 242 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 243 | endp->type->dispatch_rtp_cb(MGCP_PROTO_RTP, &addr, (char *)msg->data, msg->len, conn->conn); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 244 | msgb_free(msg); |
| 245 | } |
| 246 | |
| 247 | static struct msgb *osmux_recv(struct osmo_fd *ofd, struct sockaddr_in *addr) |
| 248 | { |
| 249 | struct msgb *msg; |
| 250 | socklen_t slen = sizeof(*addr); |
| 251 | int ret; |
| 252 | |
| 253 | msg = msgb_alloc(4096, "OSMUX"); |
| 254 | if (!msg) { |
| 255 | LOGP(DLMGCP, LOGL_ERROR, "cannot allocate message\n"); |
| 256 | return NULL; |
| 257 | } |
| 258 | ret = recvfrom(ofd->fd, msg->data, msg->data_len, 0, |
| 259 | (struct sockaddr *)addr, &slen); |
| 260 | if (ret <= 0) { |
| 261 | msgb_free(msg); |
| 262 | LOGP(DLMGCP, LOGL_ERROR, "cannot receive message\n"); |
| 263 | return NULL; |
| 264 | } |
| 265 | msgb_put(msg, ret); |
| 266 | |
| 267 | return msg; |
| 268 | } |
| 269 | |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 270 | /* Updates endp osmux state and returns 0 if it can process messages, -1 otherwise */ |
| 271 | static int endp_osmux_state_check(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn, |
| 272 | bool sending) |
| 273 | { |
| 274 | switch(conn->osmux.state) { |
| 275 | case OSMUX_STATE_ACTIVATING: |
Pau Espin Pedrol | 295570c | 2019-05-13 17:32:47 +0200 | [diff] [blame] | 276 | if (osmux_enable_conn(endp, conn, &conn->end.addr, conn->end.rtp_port) < 0) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 277 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
Pau Espin Pedrol | 3752522 | 2019-05-13 17:34:14 +0200 | [diff] [blame] | 278 | "Could not enable osmux for conn on %s: %s\n", |
| 279 | sending ? "sent" : "received", |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 280 | mgcp_conn_dump(conn->conn)); |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 281 | return -1; |
| 282 | } |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 283 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
Pau Espin Pedrol | 3752522 | 2019-05-13 17:34:14 +0200 | [diff] [blame] | 284 | "Osmux %s CID %u towards %s:%u is now enabled\n", |
| 285 | sending ? "sent" : "received", |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 286 | conn->osmux.cid, inet_ntoa(conn->end.addr), |
Pau Espin Pedrol | 295570c | 2019-05-13 17:32:47 +0200 | [diff] [blame] | 287 | ntohs(conn->end.rtp_port)); |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 288 | return 0; |
| 289 | case OSMUX_STATE_ENABLED: |
| 290 | return 0; |
| 291 | default: |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 292 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
| 293 | "Osmux %s in conn %s without full negotiation, state %d\n", |
| 294 | sending ? "sent" : "received", |
| 295 | mgcp_conn_dump(conn->conn), conn->osmux.state); |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 296 | return -1; |
| 297 | } |
| 298 | } |
| 299 | |
Pau Espin Pedrol | 662fa42 | 2018-10-16 15:54:38 +0200 | [diff] [blame] | 300 | static int osmux_legacy_dummy_parse_cid(struct sockaddr_in *addr, struct msgb *msg, |
| 301 | uint8_t *osmux_cid) |
| 302 | { |
Pau Espin Pedrol | b5583cd | 2019-05-13 12:58:24 +0200 | [diff] [blame] | 303 | if (msg->len < 1 + sizeof(*osmux_cid)) { |
Pau Espin Pedrol | 662fa42 | 2018-10-16 15:54:38 +0200 | [diff] [blame] | 304 | LOGP(DLMGCP, LOGL_ERROR, |
Pau Espin Pedrol | b5583cd | 2019-05-13 12:58:24 +0200 | [diff] [blame] | 305 | "Discarding truncated Osmux dummy load: %s\n", osmo_hexdump(msg->data, msg->len)); |
Pau Espin Pedrol | 662fa42 | 2018-10-16 15:54:38 +0200 | [diff] [blame] | 306 | return -1; |
| 307 | } |
| 308 | |
| 309 | /* extract the osmux CID from the dummy message */ |
| 310 | memcpy(osmux_cid, &msg->data[1], sizeof(*osmux_cid)); |
| 311 | return 0; |
| 312 | } |
| 313 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 314 | /* This is called from the bsc-nat */ |
| 315 | static int osmux_handle_dummy(struct mgcp_config *cfg, struct sockaddr_in *addr, |
| 316 | struct msgb *msg) |
| 317 | { |
| 318 | uint8_t osmux_cid; |
| 319 | struct mgcp_conn_rtp *conn; |
| 320 | |
| 321 | if (osmux_legacy_dummy_parse_cid(addr, msg, &osmux_cid) < 0) |
| 322 | goto out; |
| 323 | |
| 324 | conn = osmux_conn_lookup(cfg, osmux_cid, &addr->sin_addr); |
| 325 | if (!conn) { |
| 326 | LOGP(DLMGCP, LOGL_ERROR, |
| 327 | "Cannot find conn for Osmux CID %d\n", osmux_cid); |
| 328 | goto out; |
| 329 | } |
| 330 | |
| 331 | endp_osmux_state_check(conn->conn->endp, conn, false); |
| 332 | /* Only needed to punch hole in firewall, it can be dropped */ |
| 333 | out: |
| 334 | msgb_free(msg); |
| 335 | return 0; |
| 336 | } |
| 337 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 338 | #define osmux_chunk_length(msg, rem) (rem - msg->len); |
| 339 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 340 | static int osmux_read_fd_cb(struct osmo_fd *ofd, unsigned int what) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 341 | { |
| 342 | struct msgb *msg; |
| 343 | struct osmux_hdr *osmuxh; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 344 | struct sockaddr_in addr; |
| 345 | struct mgcp_config *cfg = ofd->data; |
| 346 | uint32_t rem; |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 347 | struct mgcp_conn_rtp *conn_src; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 348 | |
| 349 | msg = osmux_recv(ofd, &addr); |
| 350 | if (!msg) |
| 351 | return -1; |
| 352 | |
Pau Espin Pedrol | d14163e | 2018-10-16 15:48:59 +0200 | [diff] [blame] | 353 | if (!cfg->osmux) { |
| 354 | LOGP(DLMGCP, LOGL_ERROR, |
| 355 | "bsc-nat wants to use Osmux but bsc did not request it\n"); |
| 356 | goto out; |
| 357 | } |
| 358 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 359 | /* not any further processing dummy messages */ |
| 360 | if (msg->data[0] == MGCP_DUMMY_LOAD) |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 361 | return osmux_handle_dummy(cfg, &addr, msg); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 362 | |
| 363 | rem = msg->len; |
| 364 | while((osmuxh = osmux_xfrm_output_pull(msg)) != NULL) { |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 365 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 366 | conn_src = osmux_conn_lookup(cfg, osmuxh->circuit_id, |
| 367 | &addr.sin_addr); |
| 368 | if (!conn_src) { |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 369 | LOGP(DLMGCP, LOGL_ERROR, |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 370 | "Cannot find a src conn for circuit_id=%d\n", |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 371 | osmuxh->circuit_id); |
| 372 | goto out; |
| 373 | } |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 374 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 375 | /*conn_dst = mgcp_find_dst_conn(conn_src->conn); |
| 376 | if (!conn_dst) { |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 377 | LOGP(DLMGCP, LOGL_ERROR, |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 378 | "Cannot find a dst conn for circuit_id=%d\n", |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 379 | osmuxh->circuit_id); |
| 380 | goto out; |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 381 | }*/ |
| 382 | |
| 383 | if (endp_osmux_state_check(conn_src->conn->endp, conn_src, false) == 0) { |
| 384 | conn_src->osmux.stats.octets += osmux_chunk_length(msg, rem); |
| 385 | conn_src->osmux.stats.chunks++; |
| 386 | osmux_xfrm_output_sched(&conn_src->osmux.out, osmuxh); |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 387 | } |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 388 | rem = msg->len; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 389 | } |
| 390 | out: |
| 391 | msgb_free(msg); |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | int osmux_init(int role, struct mgcp_config *cfg) |
| 396 | { |
| 397 | int ret; |
| 398 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 399 | osmux_fd.cb = osmux_read_fd_cb; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 400 | osmux_fd.data = cfg; |
| 401 | |
| 402 | ret = mgcp_create_bind(cfg->osmux_addr, &osmux_fd, cfg->osmux_port); |
| 403 | if (ret < 0) { |
Pau Espin Pedrol | f027f17 | 2019-05-06 13:57:31 +0200 | [diff] [blame] | 404 | LOGP(DLMGCP, LOGL_ERROR, "cannot bind OSMUX socket to %s:%u\n", |
| 405 | cfg->osmux_addr, cfg->osmux_port); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 406 | return ret; |
| 407 | } |
| 408 | mgcp_set_ip_tos(osmux_fd.fd, cfg->endp_dscp); |
| 409 | osmux_fd.when |= BSC_FD_READ; |
| 410 | |
| 411 | ret = osmo_fd_register(&osmux_fd); |
| 412 | if (ret < 0) { |
Pau Espin Pedrol | f027f17 | 2019-05-06 13:57:31 +0200 | [diff] [blame] | 413 | LOGP(DLMGCP, LOGL_ERROR, "cannot register OSMUX socket %s\n", |
| 414 | osmo_sock_get_name2(osmux_fd.fd)); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 415 | return ret; |
| 416 | } |
| 417 | cfg->osmux_init = 1; |
| 418 | |
Pau Espin Pedrol | f027f17 | 2019-05-06 13:57:31 +0200 | [diff] [blame] | 419 | LOGP(DLMGCP, LOGL_INFO, "OSMUX socket listening on %s\n", |
| 420 | osmo_sock_get_name2(osmux_fd.fd)); |
| 421 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 422 | return 0; |
| 423 | } |
| 424 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 425 | /*! enable OSXMUX circuit for a specified connection. |
| 426 | * \param[in] endp mgcp endpoint (configuration) |
| 427 | * \param[in] conn connection to disable |
| 428 | * \param[in] addr IP address of remote OSMUX endpoint |
Pau Espin Pedrol | 1205686 | 2019-05-13 17:30:21 +0200 | [diff] [blame] | 429 | * \param[in] port portnumber of the remote OSMUX endpoint (in network byte order) |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 430 | * \returns 0 on success, -1 on ERROR */ |
| 431 | int osmux_enable_conn(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn, |
| 432 | struct in_addr *addr, uint16_t port) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 433 | { |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 434 | /*! If osmux is enabled, initialize the output handler. This handler is |
| 435 | * used to reconstruct the RTP flow from osmux. The RTP SSRC is |
| 436 | * allocated based on the circuit ID (conn_net->osmux.cid), which is unique |
| 437 | * in the local scope to the BSC/BSC-NAT. We use it to divide the RTP |
Pau Espin Pedrol | 17bf603 | 2018-09-17 13:38:39 +0200 | [diff] [blame] | 438 | * SSRC space (2^32) by the OSMUX_CID_MAX + 1 possible circuit IDs, then randomly |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 439 | * select one value from that window. Thus, we have no chance to have |
| 440 | * overlapping RTP SSRC traveling to the BTSes behind the BSC, |
| 441 | * similarly, for flows traveling to the MSC. |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 442 | */ |
Pau Espin Pedrol | dac2ca7 | 2019-05-13 17:34:51 +0200 | [diff] [blame] | 443 | struct in_addr addr_unset = {}; |
Pau Espin Pedrol | 17bf603 | 2018-09-17 13:38:39 +0200 | [diff] [blame] | 444 | static const uint32_t rtp_ssrc_winlen = UINT32_MAX / (OSMUX_CID_MAX + 1); |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 445 | uint16_t osmux_dummy = endp->cfg->osmux_dummy; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 446 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 447 | /* Check if osmux is enabled for the specified connection */ |
Pau Espin Pedrol | 48aff62 | 2018-10-16 16:03:57 +0200 | [diff] [blame] | 448 | if (conn->osmux.state != OSMUX_STATE_ACTIVATING) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 449 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
| 450 | "conn:%s didn't negotiate Osmux, state %d\n", |
| 451 | mgcp_conn_dump(conn->conn), conn->osmux.state); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 452 | return -1; |
| 453 | } |
| 454 | |
Pau Espin Pedrol | dac2ca7 | 2019-05-13 17:34:51 +0200 | [diff] [blame] | 455 | /* Wait until we have the connection information from MDCX */ |
| 456 | if (memcmp(&conn->end.addr, &addr_unset, sizeof(addr_unset)) == 0) { |
| 457 | LOGPCONN(conn->conn, DLMGCP, LOGL_INFO, |
| 458 | "Osmux remote address/port still unknown\n"); |
| 459 | return -1; |
| 460 | } |
| 461 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 462 | conn->osmux.in = osmux_handle_lookup(endp->cfg, addr, port); |
| 463 | if (!conn->osmux.in) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 464 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
| 465 | "Cannot allocate input osmux handle for conn:%s\n", |
| 466 | mgcp_conn_dump(conn->conn)); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 467 | return -1; |
| 468 | } |
Pau Espin Pedrol | ac772d8 | 2019-05-06 18:02:00 +0200 | [diff] [blame] | 469 | if (osmux_xfrm_input_open_circuit(conn->osmux.in, conn->osmux.cid, osmux_dummy) < 0) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 470 | LOGPCONN(conn->conn, DLMGCP, LOGL_ERROR, |
| 471 | "Cannot open osmux circuit %u for conn:%s\n", |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 472 | conn->osmux.cid, mgcp_conn_dump(conn->conn)); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 473 | return -1; |
| 474 | } |
| 475 | |
Pau Espin Pedrol | df7d97e | 2019-05-17 17:14:06 +0200 | [diff] [blame] | 476 | osmux_xfrm_output_init2(&conn->osmux.out, |
Pau Espin Pedrol | 426a9d9 | 2018-10-16 15:31:45 +0200 | [diff] [blame] | 477 | (conn->osmux.cid * rtp_ssrc_winlen) + |
Pau Espin Pedrol | df7d97e | 2019-05-17 17:14:06 +0200 | [diff] [blame] | 478 | (random() % rtp_ssrc_winlen), |
| 479 | conn->end.codec->payload_type); |
Pau Espin Pedrol | 426a9d9 | 2018-10-16 15:31:45 +0200 | [diff] [blame] | 480 | |
Pau Espin Pedrol | 1442c5a | 2019-05-06 16:10:10 +0200 | [diff] [blame] | 481 | osmux_xfrm_output_set_tx_cb(&conn->osmux.out, |
| 482 | scheduled_from_osmux_tx_rtp_cb, conn); |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 483 | |
| 484 | conn->osmux.state = OSMUX_STATE_ENABLED; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 489 | /*! disable OSXMUX circuit for a specified connection. |
| 490 | * \param[in] conn connection to disable */ |
Pau Espin Pedrol | 85978da | 2019-05-17 14:38:19 +0200 | [diff] [blame] | 491 | void conn_osmux_disable(struct mgcp_conn_rtp *conn) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 492 | { |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 493 | |
Pau Espin Pedrol | 85978da | 2019-05-17 14:38:19 +0200 | [diff] [blame] | 494 | OSMO_ASSERT(conn->osmux.state != OSMUX_STATE_DISABLED); |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 495 | |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 496 | LOGPCONN(conn->conn, DLMGCP, LOGL_INFO, |
Pau Espin Pedrol | 85978da | 2019-05-17 14:38:19 +0200 | [diff] [blame] | 497 | "Releasing connection using Osmux CID %u\n", conn->osmux.cid); |
Pau Espin Pedrol | f2321b7 | 2018-05-17 13:55:14 +0200 | [diff] [blame] | 498 | |
Pau Espin Pedrol | 85978da | 2019-05-17 14:38:19 +0200 | [diff] [blame] | 499 | if (conn->osmux.state == OSMUX_STATE_ENABLED) { |
| 500 | /* We are closing, we don't need pending RTP packets to be transmitted */ |
| 501 | osmux_xfrm_output_set_tx_cb(&conn->osmux.out, NULL, NULL); |
| 502 | osmux_xfrm_output_flush(&conn->osmux.out); |
Pau Espin Pedrol | f2321b7 | 2018-05-17 13:55:14 +0200 | [diff] [blame] | 503 | |
Pau Espin Pedrol | 85978da | 2019-05-17 14:38:19 +0200 | [diff] [blame] | 504 | osmux_xfrm_input_close_circuit(conn->osmux.in, conn->osmux.cid); |
| 505 | conn->osmux.state = OSMUX_STATE_DISABLED; |
| 506 | conn_osmux_release_cid(conn); |
| 507 | osmux_handle_put(conn->osmux.in); |
| 508 | } |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 509 | conn_osmux_release_cid(conn); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 510 | } |
| 511 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 512 | /*! relase OSXMUX cid, that had been allocated to this connection. |
| 513 | * \param[in] conn connection with OSMUX cid to release */ |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 514 | void conn_osmux_release_cid(struct mgcp_conn_rtp *conn) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 515 | { |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 516 | if (conn->osmux.cid_allocated) |
| 517 | osmux_cid_pool_put(conn->osmux.cid); |
| 518 | conn->osmux.cid = 0; |
| 519 | conn->osmux.cid_allocated = false; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 520 | } |
| 521 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 522 | /*! allocate OSXMUX cid to connection. |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 523 | * \param[in] conn connection for which we allocate the OSMUX cid |
| 524 | * \param[in] osmux_cid OSMUX cid to allocate. -1 Means take next available one. |
| 525 | * \returns Allocated OSMUX cid, -1 on error (no free cids avail, or selected one is already taken). |
| 526 | */ |
| 527 | int conn_osmux_allocate_cid(struct mgcp_conn_rtp *conn, int osmux_cid) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 528 | { |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 529 | if (osmux_cid != -1 && osmux_cid_pool_allocated((uint8_t) osmux_cid)) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 530 | LOGPCONN(conn->conn, DLMGCP, LOGL_INFO, |
| 531 | "Osmux CID %d already allocated!\n", |
| 532 | osmux_cid); |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 533 | return -1; |
| 534 | } |
| 535 | |
| 536 | if (osmux_cid == -1) { |
| 537 | osmux_cid = osmux_cid_pool_get_next(); |
| 538 | if (osmux_cid == -1) { |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 539 | LOGPCONN(conn->conn, DLMGCP, LOGL_INFO, |
| 540 | "no available Osmux CID to allocate!\n"); |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 541 | return -1; |
| 542 | } |
| 543 | } else |
| 544 | osmux_cid_pool_get(osmux_cid); |
| 545 | |
| 546 | conn->osmux.cid = (uint8_t) osmux_cid; |
| 547 | conn->osmux.cid_allocated = true; |
Pau Espin Pedrol | fa810e8 | 2019-05-06 18:54:10 +0200 | [diff] [blame] | 548 | conn->type = MGCP_OSMUX_BSC; |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 549 | return osmux_cid; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 550 | } |
| 551 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 552 | /*! send RTP dummy packet to OSMUX connection port. |
| 553 | * \param[in] endp mcgp endpoint that holds the RTP connection |
| 554 | * \param[in] conn associated RTP connection |
| 555 | * \returns bytes sent, -1 on error */ |
| 556 | int osmux_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 557 | { |
Pau Espin Pedrol | c1ad553 | 2019-05-15 23:00:53 +0200 | [diff] [blame] | 558 | struct osmux_hdr *osmuxh; |
| 559 | int buf_len; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 560 | struct in_addr addr_unset = {}; |
| 561 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 562 | /*! The dummy packet will not be sent via the actual OSMUX connection, |
| 563 | * instead it is sent out of band to port where the remote OSMUX |
| 564 | * multplexer is listening. The goal is to ensure that the connection |
| 565 | * is kept open */ |
| 566 | |
| 567 | /*! We don't need to send the dummy load for osmux so often as another |
| 568 | * endpoint may have already punched the hole in the firewall. This |
| 569 | * approach is simple though. */ |
| 570 | |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 571 | /* Wait until we have the connection information from MDCX */ |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 572 | if (memcmp(&conn->end.addr, &addr_unset, sizeof(addr_unset)) == 0) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 573 | return 0; |
| 574 | |
Pau Espin Pedrol | de2a4d7 | 2018-10-16 16:37:43 +0200 | [diff] [blame] | 575 | if (endp_osmux_state_check(endp, conn, true) < 0) |
| 576 | return 0; |
| 577 | |
Pau Espin Pedrol | c1ad553 | 2019-05-15 23:00:53 +0200 | [diff] [blame] | 578 | buf_len = sizeof(struct osmux_hdr) + osmo_amr_bytes(AMR_FT_0); |
| 579 | osmuxh = (struct osmux_hdr *) alloca(buf_len); |
| 580 | memset(osmuxh, 0, buf_len); |
| 581 | osmuxh->ft = OSMUX_FT_DUMMY; |
| 582 | osmuxh->amr_ft = AMR_FT_0; |
| 583 | osmuxh->circuit_id = conn->osmux.cid; |
| 584 | |
Pau Espin Pedrol | c9a6280 | 2019-05-13 13:20:13 +0200 | [diff] [blame] | 585 | LOGPCONN(conn->conn, DLMGCP, LOGL_DEBUG, |
Pau Espin Pedrol | 3752522 | 2019-05-13 17:34:14 +0200 | [diff] [blame] | 586 | "sending OSMUX dummy load to %s:%u CID %u\n", |
| 587 | inet_ntoa(conn->end.addr), ntohs(conn->end.rtp_port), conn->osmux.cid); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 588 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 589 | return mgcp_udp_send(osmux_fd.fd, &conn->end.addr, |
Pau Espin Pedrol | c1ad553 | 2019-05-15 23:00:53 +0200 | [diff] [blame] | 590 | conn->end.rtp_port, (char*)osmuxh, buf_len); |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 591 | } |
| 592 | |
Pau Espin Pedrol | bcd52e5 | 2018-09-17 12:41:28 +0200 | [diff] [blame] | 593 | /* bsc-nat allocates/releases the Osmux circuit ID. +7 to round up to 8 bit boundary. */ |
| 594 | static uint8_t osmux_cid_bitmap[(OSMUX_CID_MAX + 1 + 7) / 8]; |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 595 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 596 | /*! count the number of taken OSMUX cids. |
| 597 | * \returns number of OSMUX cids in use */ |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 598 | int osmux_cid_pool_count_used(void) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 599 | { |
| 600 | int i, j, used = 0; |
| 601 | |
| 602 | for (i = 0; i < sizeof(osmux_cid_bitmap); i++) { |
| 603 | for (j = 0; j < 8; j++) { |
| 604 | if (osmux_cid_bitmap[i] & (1 << j)) |
| 605 | used += 1; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | return used; |
| 610 | } |
| 611 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 612 | /*! take a free OSMUX cid. |
| 613 | * \returns OSMUX cid */ |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 614 | int osmux_cid_pool_get_next(void) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 615 | { |
| 616 | int i, j; |
| 617 | |
| 618 | for (i = 0; i < sizeof(osmux_cid_bitmap); i++) { |
| 619 | for (j = 0; j < 8; j++) { |
| 620 | if (osmux_cid_bitmap[i] & (1 << j)) |
| 621 | continue; |
| 622 | |
| 623 | osmux_cid_bitmap[i] |= (1 << j); |
| 624 | LOGP(DLMGCP, LOGL_DEBUG, |
| 625 | "Allocating Osmux CID %u from pool\n", (i * 8) + j); |
| 626 | return (i * 8) + j; |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | LOGP(DLMGCP, LOGL_ERROR, "All Osmux circuits are in use!\n"); |
| 631 | return -1; |
| 632 | } |
| 633 | |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 634 | /*! take a specific OSMUX cid. |
| 635 | * \param[in] osmux_cid OSMUX cid */ |
| 636 | void osmux_cid_pool_get(uint8_t osmux_cid) |
| 637 | { |
| 638 | LOGP(DLMGCP, LOGL_DEBUG, "Allocating Osmux CID %u from pool\n", osmux_cid); |
| 639 | osmux_cid_bitmap[osmux_cid / 8] |= (1 << (osmux_cid % 8)); |
| 640 | } |
| 641 | |
Philipp Maier | 87bd9be | 2017-08-22 16:35:41 +0200 | [diff] [blame] | 642 | /*! put back a no longer used OSMUX cid. |
| 643 | * \param[in] osmux_cid OSMUX cid */ |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 644 | void osmux_cid_pool_put(uint8_t osmux_cid) |
Neels Hofmeyr | f83ec56 | 2017-09-07 19:18:40 +0200 | [diff] [blame] | 645 | { |
| 646 | LOGP(DLMGCP, LOGL_DEBUG, "Osmux CID %u is back to the pool\n", osmux_cid); |
| 647 | osmux_cid_bitmap[osmux_cid / 8] &= ~(1 << (osmux_cid % 8)); |
| 648 | } |
Pau Espin Pedrol | 8de58e7 | 2019-04-24 13:33:46 +0200 | [diff] [blame] | 649 | |
| 650 | /*! check if OSMUX cid is already taken */ |
| 651 | bool osmux_cid_pool_allocated(uint8_t osmux_cid) |
| 652 | { |
| 653 | return !!(osmux_cid_bitmap[osmux_cid / 8] & (1 << (osmux_cid % 8))); |
| 654 | } |