Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 1 | /* MSC related stuff... */ |
| 2 | /* |
| 3 | * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 4 | * (C) 2010 by On-Waves |
| 5 | * All Rights Reserved |
| 6 | * |
Holger Hans Peter Freyther | de56c22 | 2011-01-16 17:45:14 +0100 | [diff] [blame] | 7 | * This program is free software: you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Holger Hans Peter Freyther | de56c22 | 2011-01-16 17:45:14 +0100 | [diff] [blame] | 15 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 16 | * |
Holger Hans Peter Freyther | de56c22 | 2011-01-16 17:45:14 +0100 | [diff] [blame] | 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <bsc_data.h> |
Holger Hans Peter Freyther | 0f349f2 | 2010-10-06 04:39:08 +0800 | [diff] [blame] | 23 | #include <bsc_ussd.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 24 | #include <bss_patch.h> |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 25 | #include <bsc_sccp.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 26 | #include <bssap_sccp.h> |
| 27 | #include <ipaccess.h> |
| 28 | #include <mtp_data.h> |
Holger Hans Peter Freyther | cbf7d18 | 2010-07-31 05:25:35 +0800 | [diff] [blame] | 29 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 30 | |
Holger Hans Peter Freyther | cbf7d18 | 2010-07-31 05:25:35 +0800 | [diff] [blame] | 31 | #include <osmocore/tlv.h> |
| 32 | #include <osmocore/utils.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 33 | |
| 34 | #include <arpa/inet.h> |
| 35 | #include <sys/socket.h> |
| 36 | #include <netinet/tcp.h> |
| 37 | |
| 38 | #include <fcntl.h> |
| 39 | #include <unistd.h> |
| 40 | #include <errno.h> |
| 41 | #include <string.h> |
| 42 | |
| 43 | #define RECONNECT_TIME 10, 0 |
| 44 | #define NAT_MUX 0xfc |
| 45 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 46 | static void msc_send_id_response(struct bsc_msc_forward *bsc); |
| 47 | static void msc_send(struct bsc_msc_forward *bsc, struct msgb *msg, int proto); |
| 48 | static void msc_schedule_reconnect(struct bsc_msc_forward *bsc); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 49 | |
Holger Hans Peter Freyther | 569f1e1 | 2011-01-02 18:47:49 +0100 | [diff] [blame] | 50 | int send_or_queue_bsc_msg(struct mtp_link_set *link, int sls, struct msgb *msg) |
Holger Hans Peter Freyther | a4ca6d3 | 2010-10-06 04:51:44 +0800 | [diff] [blame] | 51 | { |
Holger Hans Peter Freyther | 569f1e1 | 2011-01-02 18:47:49 +0100 | [diff] [blame] | 52 | if (mtp_link_set_submit_sccp_data(link, sls, msg->l2h, msgb_l2len(msg)) != 0) |
Holger Hans Peter Freyther | a4ca6d3 | 2010-10-06 04:51:44 +0800 | [diff] [blame] | 53 | LOGP(DMSC, LOGL_ERROR, "Could not forward SCCP message.\n"); |
| 54 | return 0; |
| 55 | } |
| 56 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 57 | void msc_close_connection(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 58 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 59 | struct bsc_fd *bfd = &fw->msc_connection.bfd; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 60 | |
| 61 | close(bfd->fd); |
| 62 | bsc_unregister_fd(bfd); |
| 63 | bfd->fd = -1; |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 64 | fw->msc_link_down = 1; |
| 65 | release_bsc_resources(fw); |
| 66 | bsc_del_timer(&fw->ping_timeout); |
| 67 | bsc_del_timer(&fw->pong_timeout); |
| 68 | bsc_del_timer(&fw->msc_timeout); |
| 69 | msc_schedule_reconnect(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 70 | } |
| 71 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 72 | static void msc_connect_timeout(void *_fw_data) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 73 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 74 | struct bsc_msc_forward *fw = _fw_data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 75 | |
| 76 | LOGP(DMSC, LOGL_ERROR, "Timeout on the MSC connection.\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 77 | msc_close_connection(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 78 | } |
| 79 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 80 | static void msc_pong_timeout(void *_fw_data) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 81 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 82 | struct bsc_msc_forward *fw = _fw_data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 83 | LOGP(DMSC, LOGL_ERROR, "MSC didn't respond to ping. Closing.\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 84 | msc_close_connection(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 85 | } |
| 86 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 87 | static void send_ping(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 88 | { |
| 89 | struct msgb *msg; |
| 90 | |
| 91 | msg = msgb_alloc_headroom(4096, 128, "ping"); |
| 92 | if (!msg) { |
| 93 | LOGP(DMSC, LOGL_ERROR, "Failed to create PING.\n"); |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | msg->l2h = msgb_put(msg, 1); |
| 98 | msg->l2h[0] = IPAC_MSGT_PING; |
| 99 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 100 | msc_send(fw, msg, IPAC_PROTO_IPACCESS); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 101 | } |
| 102 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 103 | static void msc_ping_timeout(void *_fw_data) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 104 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 105 | struct bsc_msc_forward *fw = _fw_data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 106 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 107 | if (fw->ping_time < 0) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 108 | return; |
| 109 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 110 | send_ping(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 111 | |
| 112 | /* send another ping in 20 seconds */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 113 | bsc_schedule_timer(&fw->ping_timeout, fw->ping_time, 0); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 114 | |
| 115 | /* also start a pong timer */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 116 | bsc_schedule_timer(&fw->pong_timeout, fw->pong_time, 0); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | /* |
| 120 | * callback with IP access data |
| 121 | */ |
| 122 | static int ipaccess_a_fd_cb(struct bsc_fd *bfd) |
| 123 | { |
| 124 | int error; |
| 125 | struct ipaccess_head *hh; |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 126 | struct bsc_msc_forward *fw; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 127 | struct msgb *msg; |
| 128 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 129 | fw = bfd->data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 130 | msg = ipaccess_read_msg(bfd, &error); |
| 131 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 132 | if (!msg) { |
| 133 | if (error == 0) |
| 134 | fprintf(stderr, "The connection to the MSC was lost, exiting\n"); |
| 135 | else |
| 136 | fprintf(stderr, "Error in the IPA stream.\n"); |
| 137 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 138 | msc_close_connection(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | LOGP(DMSC, LOGL_DEBUG, "From MSC: %s proto: %d\n", hexdump(msg->data, msg->len), msg->l2h[0]); |
| 143 | |
| 144 | /* handle base message handling */ |
| 145 | hh = (struct ipaccess_head *) msg->data; |
| 146 | ipaccess_rcvmsg_base(msg, bfd); |
| 147 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 148 | /* initialize the networking. This includes sending a GSM08.08 message */ |
| 149 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 150 | if (fw->first_contact) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 151 | LOGP(DMSC, LOGL_NOTICE, "Connected to MSC. Sending reset.\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 152 | bsc_del_timer(&fw->msc_timeout); |
| 153 | fw->first_contact = 0; |
| 154 | fw->msc_link_down = 0; |
| 155 | msc_send_reset(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 156 | } |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 157 | if (msg->l2h[0] == IPAC_MSGT_ID_GET && fw->token) { |
| 158 | msc_send_id_response(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 159 | } else if (msg->l2h[0] == IPAC_MSGT_PONG) { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 160 | bsc_del_timer(&fw->pong_timeout); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 161 | } |
| 162 | } else if (hh->proto == IPAC_PROTO_SCCP) { |
| 163 | struct sccp_parse_result result; |
| 164 | int rc; |
Holger Hans Peter Freyther | 7694381 | 2010-11-16 11:14:34 +0100 | [diff] [blame] | 165 | |
| 166 | /* we can not forward it right now */ |
Holger Hans Peter Freyther | cea4518 | 2011-02-10 20:03:52 +0100 | [diff] [blame^] | 167 | if (fw->forward_only) { |
| 168 | if (fw->bsc->sccp_up && send_or_queue_bsc_msg(fw->bsc, -1, msg) == 1) |
| 169 | return 0; |
| 170 | |
| 171 | msgb_free(msg); |
Holger Hans Peter Freyther | 7694381 | 2010-11-16 11:14:34 +0100 | [diff] [blame] | 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 176 | rc = bss_patch_filter_msg(msg, &result); |
| 177 | |
| 178 | if (rc == BSS_FILTER_RESET_ACK) { |
| 179 | LOGP(DMSC, LOGL_NOTICE, "Filtering reset ack from the MSC\n"); |
| 180 | } else if (rc == BSS_FILTER_RLSD) { |
| 181 | LOGP(DMSC, LOGL_DEBUG, "Filtering RLSD from the MSC\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 182 | update_con_state(fw, rc, &result, msg, 1, 0); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 183 | } else if (rc == BSS_FILTER_RLC) { |
| 184 | /* if we receive this we have forwarded a RLSD to the network */ |
| 185 | LOGP(DMSC, LOGL_ERROR, "RLC from the network. BAD!\n"); |
| 186 | } else if (rc == BSS_FILTER_CLEAR_COMPL) { |
| 187 | LOGP(DMSC, LOGL_ERROR, "Clear Complete from the network.\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 188 | } else if (fw->bsc->sccp_up) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 189 | unsigned int sls; |
| 190 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 191 | update_con_state(fw, rc, &result, msg, 1, 0); |
| 192 | sls = sls_for_src_ref(fw, result.destination_local_reference); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 193 | |
Holger Hans Peter Freyther | 0f349f2 | 2010-10-06 04:39:08 +0800 | [diff] [blame] | 194 | /* Check for Location Update Accept */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 195 | bsc_ussd_handle_in_msg(fw, &result, msg); |
Holger Hans Peter Freyther | 0f349f2 | 2010-10-06 04:39:08 +0800 | [diff] [blame] | 196 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 197 | /* patch a possible PC */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 198 | bss_rewrite_header_to_bsc(msg, fw->bsc->opc, fw->bsc->dpc); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 199 | |
| 200 | /* we can not forward it right now */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 201 | if (send_or_queue_bsc_msg(fw->bsc, sls, msg) == 1) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 202 | return 0; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 203 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 204 | } |
| 205 | } else if (hh->proto == NAT_MUX) { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 206 | mgcp_forward(fw, msg->l2h, msgb_l2len(msg)); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 207 | } else { |
| 208 | LOGP(DMSC, LOGL_ERROR, "Unknown IPA proto 0x%x\n", hh->proto); |
| 209 | } |
| 210 | |
| 211 | msgb_free(msg); |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | static int ipaccess_write_cb(struct bsc_fd *fd, struct msgb *msg) |
| 216 | { |
| 217 | int rc; |
| 218 | |
| 219 | LOGP(DMSC, LOGL_DEBUG, "Sending to MSC: %s\n", hexdump(msg->data, msg->len)); |
| 220 | rc = write(fd->fd, msg->data, msg->len); |
| 221 | if (rc != msg->len) |
| 222 | LOGP(DMSC, LOGL_ERROR, "Could not write to MSC.\n"); |
| 223 | |
| 224 | return rc; |
| 225 | } |
| 226 | |
| 227 | /* called in the case of a non blocking connect */ |
| 228 | static int msc_connection_connect(struct bsc_fd *fd, unsigned int what) |
| 229 | { |
| 230 | int rc; |
| 231 | int val; |
| 232 | socklen_t len = sizeof(val); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 233 | struct bsc_msc_forward *fw; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 234 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 235 | fw = fd->data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 236 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 237 | if (fd != &fw->msc_connection.bfd) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 238 | LOGP(DMSC, LOGL_ERROR, "This is only working with the MSC connection.\n"); |
| 239 | return -1; |
| 240 | } |
| 241 | |
| 242 | if ((what & BSC_FD_WRITE) == 0) |
| 243 | return -1; |
| 244 | |
| 245 | /* check the socket state */ |
| 246 | rc = getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &val, &len); |
| 247 | if (rc != 0) { |
| 248 | LOGP(DMSC, LOGL_ERROR, "getsockopt for the MSC socket failed.\n"); |
| 249 | goto error; |
| 250 | } |
| 251 | if (val != 0) { |
| 252 | LOGP(DMSC, LOGL_ERROR, "Not connected to the MSC.\n"); |
| 253 | goto error; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | /* go to full operation */ |
| 258 | fd->cb = write_queue_bfd_cb; |
| 259 | fd->when = BSC_FD_READ; |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 260 | if (!llist_empty(&fw->msc_connection.msg_queue)) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 261 | fd->when |= BSC_FD_WRITE; |
| 262 | return 0; |
| 263 | |
| 264 | error: |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 265 | msc_close_connection(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 266 | return -1; |
| 267 | } |
| 268 | |
Holger Hans Peter Freyther | 377ba42 | 2010-10-01 20:37:40 +0800 | [diff] [blame] | 269 | static int setnonblocking(struct bsc_fd *fd) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 270 | { |
| 271 | int flags; |
| 272 | |
| 273 | flags = fcntl(fd->fd, F_GETFL); |
| 274 | if (flags < 0) { |
| 275 | perror("fcntl get failed"); |
| 276 | close(fd->fd); |
| 277 | fd->fd = -1; |
Holger Hans Peter Freyther | 377ba42 | 2010-10-01 20:37:40 +0800 | [diff] [blame] | 278 | return -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | flags |= O_NONBLOCK; |
| 282 | flags = fcntl(fd->fd, F_SETFL, flags); |
| 283 | if (flags < 0) { |
| 284 | perror("fcntl get failed"); |
| 285 | close(fd->fd); |
| 286 | fd->fd = -1; |
Holger Hans Peter Freyther | 377ba42 | 2010-10-01 20:37:40 +0800 | [diff] [blame] | 287 | return -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 288 | } |
Holger Hans Peter Freyther | 377ba42 | 2010-10-01 20:37:40 +0800 | [diff] [blame] | 289 | |
| 290 | return 0; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | static int connect_to_msc(struct bsc_fd *fd, const char *ip, int port, int tos) |
| 294 | { |
| 295 | struct sockaddr_in sin; |
| 296 | int on = 1, ret; |
| 297 | |
| 298 | LOGP(DMSC, LOGL_NOTICE, "Attempting to connect MSC at %s:%d\n", ip, port); |
| 299 | |
| 300 | fd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 301 | |
| 302 | if (fd->fd < 0) { |
| 303 | perror("Creating TCP socket failed"); |
| 304 | return fd->fd; |
| 305 | } |
| 306 | |
| 307 | /* make it non blocking */ |
Holger Hans Peter Freyther | 377ba42 | 2010-10-01 20:37:40 +0800 | [diff] [blame] | 308 | if (setnonblocking(fd) != 0) |
| 309 | return -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 310 | |
| 311 | memset(&sin, 0, sizeof(sin)); |
| 312 | sin.sin_family = AF_INET; |
| 313 | sin.sin_port = htons(port); |
| 314 | inet_aton(ip, &sin.sin_addr); |
| 315 | |
| 316 | setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 317 | ret = setsockopt(fd->fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); |
| 318 | if (ret != 0) |
| 319 | LOGP(DMSC, LOGL_ERROR, "Failed to set TCP_NODELAY: %s\n", strerror(errno)); |
| 320 | ret = setsockopt(fd->fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)); |
| 321 | if (ret != 0) |
| 322 | LOGP(DMSC, LOGL_ERROR, "Failed to set IP_TOS: %s\n", strerror(errno)); |
| 323 | |
| 324 | ret = connect(fd->fd, (struct sockaddr *) &sin, sizeof(sin)); |
| 325 | |
| 326 | if (ret == -1 && errno == EINPROGRESS) { |
| 327 | LOGP(DMSC, LOGL_ERROR, "MSC Connection in progress\n"); |
| 328 | fd->when = BSC_FD_WRITE; |
| 329 | fd->cb = msc_connection_connect; |
| 330 | } else if (ret < 0) { |
| 331 | perror("Connection failed"); |
| 332 | close(fd->fd); |
| 333 | fd->fd = -1; |
| 334 | return ret; |
| 335 | } else { |
| 336 | fd->when = BSC_FD_READ; |
| 337 | fd->cb = write_queue_bfd_cb; |
| 338 | } |
| 339 | |
| 340 | ret = bsc_register_fd(fd); |
| 341 | if (ret < 0) { |
| 342 | perror("Registering the fd failed"); |
| 343 | close(fd->fd); |
| 344 | fd->fd = -1; |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | return ret; |
| 349 | } |
| 350 | |
| 351 | static void msc_reconnect(void *_data) |
| 352 | { |
| 353 | int rc; |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 354 | struct bsc_msc_forward *fw = _data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 355 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 356 | bsc_del_timer(&fw->reconnect_timer); |
| 357 | fw->first_contact = 1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 358 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 359 | rc = connect_to_msc(&fw->msc_connection.bfd, fw->msc_address, 5000, fw->msc_ip_dscp); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 360 | if (rc < 0) { |
| 361 | fprintf(stderr, "Opening the MSC connection failed. Trying again\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 362 | bsc_schedule_timer(&fw->reconnect_timer, RECONNECT_TIME); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 363 | return; |
| 364 | } |
| 365 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 366 | fw->msc_timeout.cb = msc_connect_timeout; |
| 367 | fw->msc_timeout.data = fw; |
| 368 | bsc_schedule_timer(&fw->msc_timeout, fw->msc_time, 0); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 369 | } |
| 370 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 371 | static void msc_schedule_reconnect(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 372 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 373 | bsc_schedule_timer(&fw->reconnect_timer, RECONNECT_TIME); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | /* |
| 377 | * mgcp forwarding is below |
| 378 | */ |
| 379 | static int mgcp_do_write(struct bsc_fd *fd, struct msgb *msg) |
| 380 | { |
| 381 | int ret; |
| 382 | |
| 383 | LOGP(DMGCP, LOGL_DEBUG, "Sending msg to MGCP GW size: %u\n", msg->len); |
| 384 | |
| 385 | ret = write(fd->fd, msg->data, msg->len); |
| 386 | if (ret != msg->len) |
| 387 | LOGP(DMGCP, LOGL_ERROR, "Failed to forward message to MGCP GW (%s).\n", strerror(errno)); |
| 388 | |
| 389 | return ret; |
| 390 | } |
| 391 | |
| 392 | static int mgcp_do_read(struct bsc_fd *fd) |
| 393 | { |
| 394 | struct msgb *mgcp; |
| 395 | int ret; |
| 396 | |
| 397 | mgcp = msgb_alloc_headroom(4096, 128, "mgcp_from_gw"); |
| 398 | if (!mgcp) { |
| 399 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate MGCP message.\n"); |
| 400 | return -1; |
| 401 | } |
| 402 | |
| 403 | ret = read(fd->fd, mgcp->data, 4096 - 128); |
| 404 | if (ret <= 0) { |
| 405 | LOGP(DMGCP, LOGL_ERROR, "Failed to read: %d/%s\n", errno, strerror(errno)); |
| 406 | msgb_free(mgcp); |
| 407 | return -1; |
| 408 | } else if (ret > 4096 - 128) { |
| 409 | LOGP(DMGCP, LOGL_ERROR, "Too much data: %d\n", ret); |
| 410 | msgb_free(mgcp); |
| 411 | return -1; |
| 412 | } |
| 413 | |
| 414 | mgcp->l2h = msgb_put(mgcp, ret); |
| 415 | msc_send(fd->data, mgcp, NAT_MUX); |
| 416 | return 0; |
| 417 | } |
| 418 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 419 | void mgcp_forward(struct bsc_msc_forward *fw, const uint8_t *data, unsigned int length) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 420 | { |
| 421 | struct msgb *mgcp; |
| 422 | |
| 423 | if (length > 4096) { |
| 424 | LOGP(DMGCP, LOGL_ERROR, "Can not forward too big message.\n"); |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | mgcp = msgb_alloc(4096, "mgcp_to_gw"); |
| 429 | if (!mgcp) { |
| 430 | LOGP(DMGCP, LOGL_ERROR, "Failed to send message.\n"); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | msgb_put(mgcp, length); |
| 435 | memcpy(mgcp->data, data, mgcp->len); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 436 | if (write_queue_enqueue(&fw->mgcp_agent, mgcp) != 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 437 | LOGP(DMGCP, LOGL_FATAL, "Could not queue message to MGCP GW.\n"); |
| 438 | msgb_free(mgcp); |
| 439 | } |
| 440 | } |
| 441 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 442 | static int mgcp_create_port(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 443 | { |
| 444 | int on; |
| 445 | struct sockaddr_in addr; |
| 446 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 447 | fw->mgcp_agent.bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 448 | if (fw->mgcp_agent.bfd.fd < 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 449 | LOGP(DMGCP, LOGL_FATAL, "Failed to create UDP socket errno: %d\n", errno); |
| 450 | return -1; |
| 451 | } |
| 452 | |
| 453 | on = 1; |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 454 | setsockopt(fw->mgcp_agent.bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 455 | |
| 456 | /* try to bind the socket */ |
| 457 | memset(&addr, 0, sizeof(addr)); |
| 458 | addr.sin_family = AF_INET; |
| 459 | addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 460 | addr.sin_port = 0; |
| 461 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 462 | if (bind(fw->mgcp_agent.bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 463 | LOGP(DMGCP, LOGL_FATAL, "Failed to bind to any port.\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 464 | close(fw->mgcp_agent.bfd.fd); |
| 465 | fw->mgcp_agent.bfd.fd = -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 466 | return -1; |
| 467 | } |
| 468 | |
| 469 | /* connect to the remote */ |
| 470 | addr.sin_port = htons(2427); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 471 | if (connect(fw->mgcp_agent.bfd.fd, (struct sockaddr *) & addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 472 | LOGP(DMGCP, LOGL_FATAL, "Failed to connect to local MGCP GW. %s\n", strerror(errno)); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 473 | close(fw->mgcp_agent.bfd.fd); |
| 474 | fw->mgcp_agent.bfd.fd = -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 475 | return -1; |
| 476 | } |
| 477 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 478 | write_queue_init(&fw->mgcp_agent, 10); |
| 479 | fw->mgcp_agent.bfd.data = fw; |
| 480 | fw->mgcp_agent.bfd.when = BSC_FD_READ; |
| 481 | fw->mgcp_agent.read_cb = mgcp_do_read; |
| 482 | fw->mgcp_agent.write_cb = mgcp_do_write; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 483 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 484 | if (bsc_register_fd(&fw->mgcp_agent.bfd) != 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 485 | LOGP(DMGCP, LOGL_FATAL, "Failed to register BFD\n"); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 486 | close(fw->mgcp_agent.bfd.fd); |
| 487 | fw->mgcp_agent.bfd.fd = -1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 488 | return -1; |
| 489 | } |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 494 | int msc_init(struct bsc_msc_forward *fw, int mgcp) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 495 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 496 | write_queue_init(&fw->msc_connection, 100); |
| 497 | fw->reconnect_timer.cb = msc_reconnect; |
| 498 | fw->reconnect_timer.data = fw; |
| 499 | fw->msc_connection.read_cb = ipaccess_a_fd_cb; |
| 500 | fw->msc_connection.write_cb = ipaccess_write_cb; |
| 501 | fw->msc_connection.bfd.data = fw; |
| 502 | fw->msc_link_down = 1; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 503 | |
| 504 | /* handle the timeout */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 505 | fw->ping_timeout.cb = msc_ping_timeout; |
| 506 | fw->ping_timeout.data = fw; |
| 507 | fw->pong_timeout.cb = msc_pong_timeout; |
| 508 | fw->pong_timeout.data = fw; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 509 | |
| 510 | /* create MGCP port */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 511 | if (mgcp && mgcp_create_port(fw) != 0) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 512 | return -1; |
Holger Hans Peter Freyther | 7b7c297 | 2010-08-07 05:41:06 +0800 | [diff] [blame] | 513 | |
| 514 | /* now connect to the BSC */ |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 515 | msc_schedule_reconnect(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 519 | static void msc_send(struct bsc_msc_forward *fw, struct msgb *msg, int proto) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 520 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 521 | if (fw->msc_link_down) { |
Holger Hans Peter Freyther | 7b7c297 | 2010-08-07 05:41:06 +0800 | [diff] [blame] | 522 | LOGP(DMSC, LOGL_NOTICE, "Dropping data due lack of MSC connection.\n"); |
| 523 | msgb_free(msg); |
| 524 | return; |
| 525 | } |
| 526 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 527 | ipaccess_prepend_header(msg, proto); |
| 528 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 529 | if (write_queue_enqueue(&fw->msc_connection, msg) != 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 530 | LOGP(DMSC, LOGL_FATAL, "Failed to queue MSG for the MSC.\n"); |
| 531 | msgb_free(msg); |
| 532 | return; |
| 533 | } |
| 534 | } |
| 535 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 536 | void msc_send_rlc(struct bsc_msc_forward *fw, |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 537 | struct sccp_source_reference *src, struct sccp_source_reference *dst) |
| 538 | { |
| 539 | struct msgb *msg; |
| 540 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 541 | if (fw->msc_link_down) { |
Holger Hans Peter Freyther | e250ac3 | 2011-01-21 12:50:02 +0100 | [diff] [blame] | 542 | LOGP(DMSC, LOGL_NOTICE, "Not releasing connection due lack of connection.\n"); |
| 543 | return; |
| 544 | } |
| 545 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 546 | msg = create_sccp_rlc(src, dst); |
| 547 | if (!msg) |
| 548 | return; |
| 549 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 550 | msc_send(fw, msg, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 551 | } |
| 552 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 553 | void msc_send_reset(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 554 | { |
| 555 | struct msgb *msg; |
| 556 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 557 | if (fw->msc_link_down) { |
Holger Hans Peter Freyther | e250ac3 | 2011-01-21 12:50:02 +0100 | [diff] [blame] | 558 | LOGP(DMSC, LOGL_NOTICE, "Not sending reset due lack of connection.\n"); |
| 559 | return; |
| 560 | } |
| 561 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 562 | msg = create_reset(); |
| 563 | if (!msg) |
| 564 | return; |
| 565 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 566 | msc_send(fw, msg, IPAC_PROTO_SCCP); |
| 567 | msc_ping_timeout(fw); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 568 | } |
| 569 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 570 | static void msc_send_id_response(struct bsc_msc_forward *fw) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 571 | { |
| 572 | struct msgb *msg; |
| 573 | |
| 574 | msg = msgb_alloc_headroom(4096, 128, "id resp"); |
| 575 | msg->l2h = msgb_v_put(msg, IPAC_MSGT_ID_RESP); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 576 | msgb_l16tv_put(msg, strlen(fw->token) + 1, |
| 577 | IPAC_IDTAG_UNITNAME, (uint8_t *) fw->token); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 578 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 579 | msc_send(fw, msg, IPAC_PROTO_IPACCESS); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 580 | } |
| 581 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 582 | void msc_send_direct(struct bsc_msc_forward *fw, struct msgb *msg) |
Holger Hans Peter Freyther | 594ee9a | 2010-11-16 11:03:19 +0100 | [diff] [blame] | 583 | { |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 584 | return msc_send(fw, msg, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | 594ee9a | 2010-11-16 11:03:19 +0100 | [diff] [blame] | 585 | } |
| 586 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 587 | void msc_send_msg(struct bsc_msc_forward *fw, int rc, struct sccp_parse_result *result, struct msgb *_msg) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 588 | { |
| 589 | struct msgb *msg; |
| 590 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 591 | if (fw->msc_connection.bfd.fd < 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 592 | LOGP(DMSC, LOGL_ERROR, "No connection to the MSC. dropping\n"); |
| 593 | return; |
| 594 | } |
| 595 | |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 596 | bsc_ussd_handle_out_msg(fw, result, _msg); |
Holger Hans Peter Freyther | 0f349f2 | 2010-10-06 04:39:08 +0800 | [diff] [blame] | 597 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 598 | msg = msgb_alloc_headroom(4096, 128, "SCCP to MSC"); |
| 599 | if (!msg) { |
| 600 | LOGP(DMSC, LOGL_ERROR, "Failed to alloc MSC msg.\n"); |
| 601 | return; |
| 602 | } |
| 603 | |
| 604 | bss_rewrite_header_for_msc(rc, msg, _msg, result); |
Holger Hans Peter Freyther | e86c02e | 2011-02-10 15:32:14 +0100 | [diff] [blame] | 605 | msc_send(fw, msg, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 606 | } |