Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 1 | /* Implementation of the C7 UDP link */ |
| 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> |
| 23 | #include <udp_input.h> |
| 24 | #include <mtp_data.h> |
| 25 | #include <mtp_pcap.h> |
| 26 | #include <snmp_mtp.h> |
Holger Hans Peter Freyther | cbf7d18 | 2010-07-31 05:25:35 +0800 | [diff] [blame] | 27 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 28 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 29 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 30 | |
| 31 | #include <sys/socket.h> |
| 32 | #include <netinet/in.h> |
| 33 | #include <arpa/inet.h> |
| 34 | |
| 35 | #include <string.h> |
| 36 | #include <unistd.h> |
| 37 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 38 | static struct mtp_udp_link *find_link(struct mtp_udp_data *data, uint16_t link_index) |
| 39 | { |
| 40 | struct mtp_udp_link *lnk; |
| 41 | |
| 42 | llist_for_each_entry(lnk, &data->links, entry) |
| 43 | if (lnk->link_index == link_index) |
| 44 | return lnk; |
| 45 | |
| 46 | return NULL; |
| 47 | } |
| 48 | |
| 49 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 50 | static int udp_write_cb(struct osmo_fd *fd, struct msgb *msg) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 51 | { |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 52 | struct mtp_udp_data *data; |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 53 | struct mtp_udp_link *link; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 54 | int rc; |
| 55 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 56 | data = fd->data; |
| 57 | link = find_link(data, msg->cb[0]); |
| 58 | if (!link) { |
| 59 | LOGP(DINP, LOGL_ERROR, "Failed to find link with %lu\n", msg->cb[0]); |
| 60 | return -1; |
| 61 | } |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 62 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 63 | LOGP(DINP, LOGL_DEBUG, "Sending MSU: %s\n", osmo_hexdump(msg->data, msg->len)); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 64 | mtp_handle_pcap(link->base, NET_OUT, msg->l2h, msgb_l2len(msg)); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 65 | |
| 66 | /* the assumption is we have connected the socket to the remote */ |
| 67 | rc = sendto(fd->fd, msg->data, msg->len, 0, |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 68 | (struct sockaddr *) &link->remote, sizeof(link->remote)); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 69 | if (rc != msg->len) { |
| 70 | LOGP(DINP, LOGL_ERROR, "Failed to write msg to socket: %d\n", rc); |
| 71 | return -1; |
| 72 | } |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 77 | static int udp_read_cb(struct osmo_fd *fd) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 78 | { |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 79 | struct mtp_udp_data *data; |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 80 | struct mtp_udp_link *ulnk; |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 81 | struct mtp_link *link; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 82 | struct udp_data_hdr *hdr; |
| 83 | struct msgb *msg; |
| 84 | int rc; |
| 85 | unsigned int length; |
| 86 | |
| 87 | msg = msgb_alloc_headroom(4096, 128, "UDP datagram"); |
| 88 | if (!msg) { |
| 89 | LOGP(DINP, LOGL_ERROR, "Failed to allocate memory.\n"); |
| 90 | return -1; |
| 91 | } |
| 92 | |
| 93 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 94 | data = (struct mtp_udp_data *) fd->data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 95 | rc = read(fd->fd, msg->data, 2096); |
| 96 | if (rc < sizeof(*hdr)) { |
| 97 | LOGP(DINP, LOGL_ERROR, "Failed to read at least size of the header: %d\n", rc); |
| 98 | rc = -1; |
| 99 | goto exit; |
| 100 | } |
| 101 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 102 | hdr = (struct udp_data_hdr *) msgb_put(msg, sizeof(*hdr)); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 103 | ulnk = find_link(data, ntohs(hdr->data_link_index)); |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 104 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 105 | if (!ulnk) { |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 106 | LOGP(DINP, LOGL_ERROR, "No link registered for %d\n", |
| 107 | ntohs(hdr->data_link_index)); |
| 108 | goto exit; |
| 109 | } |
| 110 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 111 | link = ulnk->base; |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 112 | if (link->blocked) { |
| 113 | LOGP(DINP, LOGL_ERROR, "The link is blocked.\n"); |
| 114 | rc = 0; |
| 115 | goto exit; |
| 116 | } |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 117 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 118 | if (hdr->data_type == UDP_DATA_RETR_COMPL || hdr->data_type == UDP_DATA_RETR_IMPOS) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 119 | LOGP(DINP, LOGL_ERROR, "Link retrieval done on %d/%s of %d/%s.\n", |
| 120 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | fa8cf2d | 2011-01-20 16:51:34 +0100 | [diff] [blame] | 121 | mtp_link_failure(link); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 122 | goto exit; |
Holger Hans Peter Freyther | 86a2a53 | 2011-01-28 17:47:25 +0100 | [diff] [blame] | 123 | } else if (hdr->data_type == UDP_DATA_LINK_UP) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 124 | LOGP(DINP, LOGL_NOTICE, "Link of %d/%s of %d/%s is up.\n", |
| 125 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 86a2a53 | 2011-01-28 17:47:25 +0100 | [diff] [blame] | 126 | mtp_link_up(link); |
| 127 | goto exit; |
| 128 | } else if (hdr->data_type == UDP_DATA_LINK_DOWN) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 129 | LOGP(DINP, LOGL_NOTICE, "Link of %d/%s of %d/%s is down.\n", |
| 130 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 86a2a53 | 2011-01-28 17:47:25 +0100 | [diff] [blame] | 131 | mtp_link_failure(link); |
| 132 | goto exit; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 133 | } else if (hdr->data_type > UDP_DATA_MSU_PRIO_3) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 134 | LOGP(DINP, LOGL_ERROR, "Link failue on %d/%s of %d/%s.\n", |
| 135 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | fa8cf2d | 2011-01-20 16:51:34 +0100 | [diff] [blame] | 136 | mtp_link_failure(link); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 137 | goto exit; |
| 138 | } |
| 139 | |
Holger Hans Peter Freyther | 86a2a53 | 2011-01-28 17:47:25 +0100 | [diff] [blame] | 140 | /* throw away data as the link is down */ |
| 141 | if (link->set->available == 0) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 142 | LOGP(DINP, LOGL_ERROR, "Link %d/%s of %d/%s is down. Not forwarding.\n", |
| 143 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 86a2a53 | 2011-01-28 17:47:25 +0100 | [diff] [blame] | 144 | rc = 0; |
| 145 | goto exit; |
| 146 | } |
| 147 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 148 | length = ntohl(hdr->data_length); |
| 149 | if (length + sizeof(*hdr) > (unsigned int) rc) { |
Holger Hans Peter Freyther | d3f412b | 2011-01-28 18:52:16 +0100 | [diff] [blame] | 150 | LOGP(DINP, LOGL_ERROR, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 151 | "The MSU payload does not fit: %u + %u > %d on link %d/%s of %d/%s.\n", |
| 152 | length, sizeof(*hdr), rc, |
| 153 | link->nr, link->name, link->set->nr, link->set->name); |
| 154 | rc = 0; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 155 | rc = -1; |
| 156 | goto exit; |
| 157 | } |
| 158 | |
| 159 | msg->l2h = msgb_put(msg, length); |
| 160 | |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 161 | LOGP(DINP, LOGL_DEBUG, "MSU data on link %d/%s of %d/%s data %s.\n", |
| 162 | link->nr, link->name, link->set->nr, link->set->name, |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 163 | osmo_hexdump(msg->data, msg->len)); |
Holger Hans Peter Freyther | 36260e9 | 2011-01-22 17:37:56 +0100 | [diff] [blame] | 164 | mtp_handle_pcap(link, NET_IN, msg->l2h, msgb_l2len(msg)); |
Holger Hans Peter Freyther | bee2ed1 | 2011-01-18 13:29:42 +0100 | [diff] [blame] | 165 | mtp_link_set_data(link, msg); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 166 | |
| 167 | exit: |
| 168 | msgb_free(msg); |
| 169 | return rc; |
| 170 | } |
| 171 | |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 172 | static int udp_link_dummy(struct mtp_link *link) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 173 | { |
| 174 | /* nothing todo */ |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static void do_start(void *_data) |
| 179 | { |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 180 | struct mtp_udp_link *link = (struct mtp_udp_link *) _data; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 181 | |
Holger Hans Peter Freyther | 3a1c0af | 2011-01-24 20:21:11 +0100 | [diff] [blame] | 182 | snmp_mtp_activate(link->session, link->link_index); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 183 | } |
| 184 | |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 185 | static int udp_link_reset(struct mtp_link *link) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 186 | { |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 187 | struct mtp_udp_link *ulnk; |
| 188 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 189 | ulnk = (struct mtp_udp_link *) link->data; |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 190 | |
Holger Hans Peter Freyther | 3a1c0af | 2011-01-24 20:21:11 +0100 | [diff] [blame] | 191 | snmp_mtp_deactivate(ulnk->session, ulnk->link_index); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 192 | return 0; |
| 193 | } |
| 194 | |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 195 | static int udp_link_shutdown(struct mtp_link *link) |
| 196 | { |
| 197 | return udp_link_reset(link); |
| 198 | } |
| 199 | |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 200 | static int udp_link_write(struct mtp_link *link, struct msgb *msg) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 201 | { |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 202 | struct mtp_udp_link *ulnk; |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 203 | struct udp_data_hdr *hdr; |
| 204 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 205 | ulnk = (struct mtp_udp_link *) link->data; |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 206 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 207 | hdr = (struct udp_data_hdr *) msgb_push(msg, sizeof(*hdr)); |
| 208 | hdr->format_type = UDP_FORMAT_SIMPLE_UDP; |
| 209 | hdr->data_type = UDP_DATA_MSU_PRIO_0; |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 210 | hdr->data_link_index = htons(ulnk->link_index); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 211 | hdr->user_context = 0; |
| 212 | hdr->data_length = htonl(msgb_l2len(msg)); |
| 213 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 214 | msg->cb[0] = ulnk->link_index; |
| 215 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 216 | if (osmo_wqueue_enqueue(&ulnk->data->write_queue, msg) != 0) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 217 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue msg on link %d/%s of %d/%s.\n", |
| 218 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 219 | msgb_free(msg); |
| 220 | return -1; |
| 221 | } |
| 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
Holger Hans Peter Freyther | 0e2f911 | 2011-01-17 11:54:39 +0100 | [diff] [blame] | 226 | static int udp_link_start(struct mtp_link *link) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 227 | { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 228 | do_start(link); |
| 229 | return 0; |
| 230 | } |
| 231 | |
Holger Hans Peter Freyther | 3a1c0af | 2011-01-24 20:21:11 +0100 | [diff] [blame] | 232 | int link_udp_init(struct mtp_udp_link *link, char *remote, int port) |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 233 | { |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 234 | /* prepare the remote */ |
| 235 | memset(&link->remote, 0, sizeof(link->remote)); |
| 236 | link->remote.sin_family = AF_INET; |
| 237 | link->remote.sin_port = htons(port); |
| 238 | inet_aton(remote, &link->remote.sin_addr); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 239 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 240 | return 0; |
| 241 | } |
| 242 | |
Holger Hans Peter Freyther | 083a30b | 2011-01-21 12:57:12 +0100 | [diff] [blame] | 243 | static void snmp_poll(void *_data) |
| 244 | { |
| 245 | struct mtp_udp_data *data = _data; |
| 246 | snmp_mtp_poll(); |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 247 | osmo_timer_schedule(&data->snmp_poll, 0, 5000); |
Holger Hans Peter Freyther | 083a30b | 2011-01-21 12:57:12 +0100 | [diff] [blame] | 248 | } |
| 249 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 250 | int link_global_init(struct mtp_udp_data *data) |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 251 | { |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 252 | INIT_LLIST_HEAD(&data->links); |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 253 | osmo_wqueue_init(&data->write_queue, 100); |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 254 | |
| 255 | /* socket creation */ |
| 256 | data->write_queue.bfd.data = data; |
| 257 | data->write_queue.bfd.when = BSC_FD_READ; |
| 258 | data->write_queue.read_cb = udp_read_cb; |
| 259 | data->write_queue.write_cb = udp_write_cb; |
| 260 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | int link_global_bind(struct mtp_udp_data *data, int src_port) |
| 265 | { |
| 266 | struct sockaddr_in addr; |
| 267 | int fd; |
| 268 | int on; |
| 269 | |
Holger Hans Peter Freyther | f38114e | 2011-01-20 21:11:13 +0100 | [diff] [blame] | 270 | data->write_queue.bfd.fd = fd = socket(AF_INET, SOCK_DGRAM, 0); |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 271 | if (fd < 0) { |
| 272 | LOGP(DINP, LOGL_ERROR, "Failed to create UDP socket.\n"); |
| 273 | return -1; |
| 274 | } |
| 275 | |
| 276 | on = 1; |
| 277 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 278 | |
| 279 | memset(&addr, 0, sizeof(addr)); |
| 280 | addr.sin_family = AF_INET; |
| 281 | addr.sin_port = htons(src_port); |
| 282 | addr.sin_addr.s_addr = INADDR_ANY; |
| 283 | |
| 284 | if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| 285 | perror("Failed to bind UDP socket"); |
| 286 | close(fd); |
| 287 | return -1; |
| 288 | } |
| 289 | |
| 290 | /* now connect the socket to the remote */ |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 291 | if (osmo_fd_register(&data->write_queue.bfd) != 0) { |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 292 | LOGP(DINP, LOGL_ERROR, "Failed to register BFD.\n"); |
| 293 | close(fd); |
| 294 | return -1; |
| 295 | } |
| 296 | |
Holger Hans Peter Freyther | 083a30b | 2011-01-21 12:57:12 +0100 | [diff] [blame] | 297 | data->snmp_poll.data = data; |
| 298 | data->snmp_poll.cb = snmp_poll; |
| 299 | snmp_poll(data); |
| 300 | |
Holger Hans Peter Freyther | 97f66e2 | 2010-07-28 03:32:52 +0800 | [diff] [blame] | 301 | return 0; |
| 302 | } |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 303 | |
| 304 | void snmp_mtp_callback(struct snmp_mtp_session *session, |
| 305 | int area, int res, int link_id) |
| 306 | { |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 307 | struct mtp_udp_link *ulink; |
| 308 | struct mtp_link *link; |
| 309 | |
Holger Hans Peter Freyther | 3a1c0af | 2011-01-24 20:21:11 +0100 | [diff] [blame] | 310 | ulink = session->data; |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 311 | if (!ulink) |
Holger Hans Peter Freyther | d3f412b | 2011-01-28 18:52:16 +0100 | [diff] [blame] | 312 | return LOGP(DINP, LOGL_ERROR, "Failed to find link_id %d\n", link_id); |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 313 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 314 | link = ulink->base; |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 315 | |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 316 | if (res == SNMP_STATUS_TIMEOUT && !link->blocked) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 317 | LOGP(DINP, LOGL_ERROR, |
| 318 | "Failed to restart link %d/%s of linkset %d/%s\n", |
| 319 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 320 | udp_link_reset(link); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | switch (area) { |
| 325 | case SNMP_LINK_UP: |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 326 | break; |
| 327 | case SNMP_LINK_DOWN: |
| 328 | mtp_link_down(link); |
| 329 | |
| 330 | /* |
| 331 | * restart the link in 90 seconds... |
| 332 | * to force a timeout on the BSC |
| 333 | */ |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 334 | if (!link->blocked) { |
| 335 | link->link_activate.cb = do_start; |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 336 | link->link_activate.data = ulink; |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 337 | osmo_timer_schedule(&link->link_activate, ulink->reset_timeout, 0); |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 338 | LOGP(DINP, LOGL_NOTICE, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 339 | "Will bring up link %d/%s of linkset %d/%s in %d seconds.\n", |
| 340 | link->nr, link->name, |
| 341 | link->set->nr, link->set->name, |
| 342 | ulink->reset_timeout); |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 343 | } |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 344 | break; |
| 345 | default: |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 346 | LOGP(DINP, LOGL_ERROR, |
| 347 | "Unknown event %d on %d/%s of linkset %d/%s.\n", |
| 348 | area, link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | eab2096 | 2011-01-21 18:00:36 +0100 | [diff] [blame] | 349 | } |
| 350 | } |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 351 | |
| 352 | struct mtp_udp_link *mtp_udp_link_init(struct mtp_link *blnk) |
| 353 | { |
| 354 | struct bsc_data *bsc; |
| 355 | struct mtp_udp_link *lnk; |
| 356 | |
| 357 | lnk = talloc_zero(blnk, struct mtp_udp_link); |
| 358 | if (!lnk) { |
| 359 | LOGP(DINP, LOGL_ERROR, "Failed to allocate.\n"); |
| 360 | return NULL; |
| 361 | } |
| 362 | |
| 363 | /* setup SNMP first, it is blocking */ |
| 364 | lnk->session = snmp_mtp_session_create(); |
| 365 | if (!lnk->session) { |
| 366 | LOGP(DINP, LOGL_ERROR, "Failed to allocate snmp session.\n"); |
| 367 | talloc_free(lnk); |
| 368 | return NULL; |
| 369 | } |
| 370 | lnk->session->data = lnk; |
| 371 | |
| 372 | bsc = blnk->set->bsc; |
| 373 | lnk->data = &bsc->udp_data; |
| 374 | lnk->reset_timeout = bsc->udp_reset_timeout; |
| 375 | |
| 376 | lnk->base = blnk; |
| 377 | lnk->base->data = lnk; |
| 378 | lnk->base->type = SS7_LTYPE_UDP; |
| 379 | lnk->bsc = bsc; |
| 380 | |
| 381 | /* function table */ |
| 382 | lnk->base->shutdown = udp_link_shutdown; |
| 383 | lnk->base->clear_queue = udp_link_dummy; |
| 384 | |
| 385 | lnk->base->reset = udp_link_reset; |
| 386 | lnk->base->start = udp_link_start; |
| 387 | lnk->base->write = udp_link_write; |
| 388 | |
| 389 | /* prepare the remote */ |
| 390 | memset(&lnk->remote, 0, sizeof(lnk->remote)); |
| 391 | lnk->remote.sin_family = AF_INET; |
| 392 | |
| 393 | /* add it to the list of udp connections */ |
| 394 | llist_add_tail(&lnk->entry, &lnk->data->links); |
| 395 | |
| 396 | return lnk; |
| 397 | } |