Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 1 | /* MTP level3 link */ |
| 2 | /* |
| 3 | * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 4 | * (C) 2010 by On-Waves |
| 5 | * All Rights Reserved |
| 6 | * |
| 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 |
| 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 |
| 15 | * GNU Affero General Public License for more details. |
| 16 | * |
| 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/>. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <mtp_data.h> |
| 23 | #include <mtp_level3.h> |
| 24 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 25 | #include <counter.h> |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 26 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 27 | #include <osmocore/talloc.h> |
| 28 | |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 29 | #include <string.h> |
| 30 | |
| 31 | static struct msgb *mtp_create_sltm(struct mtp_link *link) |
| 32 | { |
| 33 | const uint8_t test_ptrn[14] = { 'G', 'S', 'M', 'M', 'M', 'S', }; |
| 34 | struct mtp_level_3_hdr *hdr; |
| 35 | struct mtp_level_3_mng *mng; |
| 36 | struct msgb *msg = mtp_msg_alloc(link->set); |
| 37 | uint8_t *data; |
| 38 | if (!msg) |
| 39 | return NULL; |
| 40 | |
| 41 | hdr = (struct mtp_level_3_hdr *) msg->l2h; |
| 42 | hdr->ser_ind = MTP_SI_MNT_REG_MSG; |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 43 | hdr->addr = MTP_ADDR(link->nr % 16, link->set->dpc, link->set->opc); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 44 | |
| 45 | mng = (struct mtp_level_3_mng *) msgb_put(msg, sizeof(*mng)); |
| 46 | mng->cmn.h0 = MTP_TST_MSG_GRP; |
| 47 | mng->cmn.h1 = MTP_TST_MSG_SLTM; |
| 48 | mng->length = ARRAY_SIZE(test_ptrn); |
| 49 | |
| 50 | data = msgb_put(msg, ARRAY_SIZE(test_ptrn)); |
| 51 | memcpy(data, test_ptrn, ARRAY_SIZE(test_ptrn)); |
| 52 | |
| 53 | /* remember the last tst ptrn... once we have some */ |
| 54 | memcpy(link->test_ptrn, test_ptrn, ARRAY_SIZE(test_ptrn)); |
| 55 | |
| 56 | return msg; |
| 57 | } |
| 58 | |
| 59 | static void mtp_send_sltm(struct mtp_link *link) |
| 60 | { |
| 61 | struct msgb *msg; |
| 62 | |
| 63 | link->sltm_pending = 1; |
| 64 | msg = mtp_create_sltm(link); |
| 65 | if (!msg) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 66 | LOGP(DINP, LOGL_ERROR, "Failed to allocate SLTM on link %d/%s of %d/%s.\n", |
| 67 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 68 | return; |
| 69 | } |
| 70 | |
Holger Hans Peter Freyther | 9543f4a | 2011-01-24 20:49:58 +0100 | [diff] [blame] | 71 | mtp_link_submit(link, msg); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | static void mtp_sltm_t1_timeout(void *_link) |
| 75 | { |
| 76 | struct mtp_link *link = (struct mtp_link *) _link; |
| 77 | |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 78 | rate_ctr_inc(&link->ctrg->ctr[MTP_LNK_SLTM_TOUT]); |
| 79 | |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 80 | if (link->slta_misses == 0) { |
Holger Hans Peter Freyther | 38d936a | 2011-01-26 12:41:42 +0100 | [diff] [blame] | 81 | LOGP(DINP, LOGL_ERROR, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 82 | "No SLTM response on link %d/%s of %d/%s.\n", |
| 83 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 84 | ++link->slta_misses; |
| 85 | mtp_send_sltm(link); |
| 86 | bsc_schedule_timer(&link->t1_timer, MTP_T1); |
| 87 | } else { |
Holger Hans Peter Freyther | 38d936a | 2011-01-26 12:41:42 +0100 | [diff] [blame] | 88 | LOGP(DINP, LOGL_ERROR, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 89 | "Two missing SLTAs on link %d/%s of %d/%s.\n", |
| 90 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 91 | bsc_del_timer(&link->t2_timer); |
Holger Hans Peter Freyther | fa8cf2d | 2011-01-20 16:51:34 +0100 | [diff] [blame] | 92 | mtp_link_failure(link); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 93 | } |
| 94 | } |
| 95 | |
| 96 | static void mtp_sltm_t2_timeout(void *_link) |
| 97 | { |
| 98 | struct mtp_link *link = (struct mtp_link *) _link; |
| 99 | |
| 100 | if (!link->set->running) { |
Holger Hans Peter Freyther | 38d936a | 2011-01-26 12:41:42 +0100 | [diff] [blame] | 101 | LOGP(DINP, LOGL_INFO, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 102 | "The linkset is not active. Stopping link test on %d/%s of %d/%s.\n", |
| 103 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 104 | return; |
| 105 | } |
| 106 | |
| 107 | link->slta_misses = 0; |
| 108 | mtp_send_sltm(link); |
| 109 | |
| 110 | bsc_schedule_timer(&link->t1_timer, MTP_T1); |
| 111 | |
| 112 | if (link->set->sltm_once && link->was_up) |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 113 | LOGP(DINP, LOGL_INFO, "Not sending SLTM again on link %d/%s of %d/%s.\n", |
| 114 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 115 | else |
| 116 | bsc_schedule_timer(&link->t2_timer, MTP_T2); |
| 117 | } |
| 118 | |
Holger Hans Peter Freyther | a8ce061 | 2011-01-20 16:30:24 +0100 | [diff] [blame] | 119 | void mtp_link_stop_link_test(struct mtp_link *link) |
| 120 | { |
| 121 | bsc_del_timer(&link->t1_timer); |
| 122 | bsc_del_timer(&link->t2_timer); |
| 123 | |
| 124 | link->sltm_pending = 0; |
| 125 | } |
| 126 | |
| 127 | void mtp_link_start_link_test(struct mtp_link *link) |
| 128 | { |
| 129 | mtp_sltm_t2_timeout(link); |
| 130 | } |
| 131 | |
| 132 | int mtp_link_slta(struct mtp_link *link, uint16_t l3_len, |
| 133 | struct mtp_level_3_mng *mng) |
| 134 | { |
| 135 | if (mng->length != 14) { |
| 136 | LOGP(DINP, LOGL_ERROR, "Wrongly sized SLTA: %u\n", mng->length); |
| 137 | return -1; |
| 138 | } |
| 139 | |
| 140 | if (l3_len != 16) { |
| 141 | LOGP(DINP, LOGL_ERROR, "Wrongly sized SLTA: %u\n", mng->length); |
| 142 | return -1; |
| 143 | } |
| 144 | |
| 145 | if (memcmp(mng->data, link->test_ptrn, sizeof(link->test_ptrn)) != 0) { |
| 146 | LOGP(DINP, LOGL_ERROR, "Wrong test pattern SLTA\n"); |
| 147 | return -1; |
| 148 | } |
| 149 | |
| 150 | /* we had a matching slta */ |
| 151 | bsc_del_timer(&link->t1_timer); |
| 152 | link->sltm_pending = 0; |
| 153 | link->was_up = 1; |
| 154 | |
| 155 | return 0; |
| 156 | } |
Holger Hans Peter Freyther | fa8cf2d | 2011-01-20 16:51:34 +0100 | [diff] [blame] | 157 | |
| 158 | void mtp_link_failure(struct mtp_link *link) |
| 159 | { |
Holger Hans Peter Freyther | 309d79f | 2011-01-28 18:26:20 +0100 | [diff] [blame] | 160 | if (link->blocked) { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 161 | LOGP(DINP, LOGL_ERROR, "Ignoring failure on blocked link %d/%s on %d/%s.\n", |
| 162 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 309d79f | 2011-01-28 18:26:20 +0100 | [diff] [blame] | 163 | return; |
| 164 | } |
| 165 | |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 166 | LOGP(DINP, LOGL_ERROR, "Link %d/%s of %d/%s has failed, going to reset it.\n", |
| 167 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 168 | rate_ctr_inc(&link->ctrg->ctr[MTP_LNK_ERROR]); |
Holger Hans Peter Freyther | fa8cf2d | 2011-01-20 16:51:34 +0100 | [diff] [blame] | 169 | link->reset(link); |
| 170 | } |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 171 | |
| 172 | void mtp_link_block(struct mtp_link *link) |
| 173 | { |
| 174 | link->blocked = 1; |
| 175 | link->shutdown(link); |
| 176 | } |
| 177 | |
| 178 | void mtp_link_unblock(struct mtp_link *link) |
| 179 | { |
| 180 | if (!link->blocked) |
| 181 | return; |
| 182 | link->blocked = 0; |
| 183 | link->reset(link); |
| 184 | } |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 185 | |
| 186 | static int dummy_arg1(struct mtp_link *link) |
| 187 | { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 188 | LOGP(DINP, LOGL_ERROR, "The link %d/%s of linkset %d/%s is not typed.\n", |
| 189 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int dummy_arg2(struct mtp_link *link, struct msgb *msg) |
| 194 | { |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 195 | LOGP(DINP, LOGL_ERROR, "The link %d/%s of linkset %d/%s is not typed.\n", |
| 196 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 197 | msgb_free(msg); |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | struct mtp_link *mtp_link_alloc(struct mtp_link_set *set) |
| 202 | { |
| 203 | struct mtp_link *link; |
| 204 | |
| 205 | link = talloc_zero(set, struct mtp_link); |
| 206 | if (!link) { |
| 207 | LOGP(DINP, LOGL_ERROR, "Failed to allocate the link.\n"); |
| 208 | return NULL; |
| 209 | } |
| 210 | |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 211 | link->nr = set->nr_links++; |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 212 | link->ctrg = rate_ctr_group_alloc(link, |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 213 | mtp_link_rate_ctr_desc(), link->nr); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 214 | if (!link->ctrg) { |
| 215 | LOGP(DINP, LOGL_ERROR, "Failed to allocate rate_ctr.\n"); |
| 216 | talloc_free(link); |
| 217 | return NULL; |
| 218 | } |
| 219 | |
| 220 | /* make sure a unconfigured link does not crash */ |
| 221 | link->start = dummy_arg1; |
| 222 | link->write = dummy_arg2; |
| 223 | link->shutdown = dummy_arg1; |
| 224 | link->reset = dummy_arg1; |
| 225 | link->clear_queue = dummy_arg1; |
| 226 | |
| 227 | link->pcap_fd = -1; |
| 228 | |
| 229 | link->t1_timer.data = link; |
| 230 | link->t1_timer.cb = mtp_sltm_t1_timeout; |
| 231 | link->t2_timer.data = link; |
| 232 | link->t2_timer.cb = mtp_sltm_t2_timeout; |
| 233 | |
| 234 | link->set = set; |
| 235 | |
| 236 | llist_add_tail(&link->entry, &set->links); |
| 237 | mtp_link_set_init_slc(set); |
| 238 | |
| 239 | return link; |
| 240 | } |
| 241 | |
| 242 | struct mtp_link *mtp_link_num(struct mtp_link_set *set, int num) |
| 243 | { |
| 244 | struct mtp_link *link; |
| 245 | |
| 246 | llist_for_each_entry(link, &set->links, entry) |
Holger Hans Peter Freyther | 5a34c7f | 2011-02-17 03:23:42 +0100 | [diff] [blame] | 247 | if (link->nr == num) |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 248 | return link; |
| 249 | |
| 250 | return NULL; |
| 251 | } |