/* * Handle the connection to the MSC. This include ping/timeout/reconnect * (C) 2008-2018 by Harald Welte * (C) 2009-2015 by Holger Hans Peter Freyther * (C) 2009-2015 by On-Waves * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static const struct rate_ctr_desc msc_ctr_description[] = { /* Rx message counters (per specific message) */ [MSC_CTR_BSSMAP_RX_UDT_RESET_ACKNOWLEDGE] = {"bssmap:rx:udt:reset:ack", "Number of received BSSMAP UDT RESET ACKNOWLEDGE messages"}, [MSC_CTR_BSSMAP_RX_UDT_RESET] = {"bssmap:rx:udt:reset:request", "Number of received BSSMAP UDT RESET messages"}, [MSC_CTR_BSSMAP_RX_UDT_PAGING] = {"bssmap:rx:udt:paging", "Number of received BSSMAP UDT PAGING messages"}, [MSC_CTR_BSSMAP_RX_UDT_UNKNOWN] = {"bssmap:rx:udt:err_unknown", "Number of received BSSMAP unknown UDT messages"}, [MSC_CTR_BSSMAP_RX_DT1_CLEAR_CMD] = {"bssmap:rx:dt1:clear:cmd", "Number of received BSSMAP DT1 CLEAR CMD messages"}, [MSC_CTR_BSSMAP_RX_DT1_CIPHER_MODE_CMD] = {"bssmap:rx:dt1:cipher_mode:cmd", "Number of received BSSMAP DT1 CIPHER MODE CMD messages"}, [MSC_CTR_BSSMAP_RX_DT1_ASSIGMENT_RQST] = {"bssmap:rx:dt1:assignment:rqst", "Number of received BSSMAP DT1 ASSIGMENT RQST messages"}, [MSC_CTR_BSSMAP_RX_DT1_LCLS_CONNECT_CTRL] = {"bssmap:rx:dt1:lcls_connect_ctrl:cmd", "Number of received BSSMAP DT1 LCLS CONNECT CTRL messages"}, [MSC_CTR_BSSMAP_RX_DT1_HANDOVER_CMD] = {"bssmap:rx:dt1:handover:cmd", "Number of received BSSMAP DT1 HANDOVER CMD messages"}, [MSC_CTR_BSSMAP_RX_DT1_CLASSMARK_RQST] = {"bssmap:rx:dt1:classmark:rqst", "Number of received BSSMAP DT1 CLASSMARK RQST messages"}, [MSC_CTR_BSSMAP_RX_DT1_CONFUSION] = {"bssmap:rx:dt1:confusion", "Number of received BSSMAP DT1 CONFUSION messages"}, [MSC_CTR_BSSMAP_RX_DT1_UNKNOWN] = {"bssmap:rx:dt1:err_unknown", "Number of received BSSMAP unknown DT1 messages"}, [MSC_CTR_BSSMAP_RX_DT1_DTAP] = {"bssmap:rx:dt1:dtap:good", "Number of received BSSMAP DTAP messages"}, [MSC_CTR_BSSMAP_RX_DT1_DTAP_ERROR] = {"bssmap:rx:dt1:dtap:error", "Number of received BSSMAP DTAP messages with errors"}, /* Tx message counters (per message type) * * The counters here follow the logic of the osmo_bsc_sigtran_send() function * which receives DT1 messages from the upper layers and actually sends them to the MSC. * These counters cover all messages passed to the function by the upper layers: */ [MSC_CTR_BSSMAP_TX_BSS_MANAGEMENT] = {"bssmap:tx:type:bss_management", "Number of transmitted BSS MANAGEMENT messages"}, [MSC_CTR_BSSMAP_TX_DTAP] = {"bssmap:tx:type:dtap", "Number of transmitted DTAP messages"}, [MSC_CTR_BSSMAP_TX_UNKNOWN] = {"bssmap:tx:type:err_unknown", "Number of transmitted messages with unknown type (an error in our code?)"}, [MSC_CTR_BSSMAP_TX_SHORT] = {"bssmap:tx:type:err_short", "Number of transmitted messages which are too short (an error in our code?)"}, /* The next counters are also counted in the osmo_bsc_sigtran_send() function and * sum up to the exactly same number as the counters above but instead of message * classes they split by the result of the sending attempt: */ [MSC_CTR_BSSMAP_TX_ERR_CONN_NOT_READY] = {"bssmap:tx:result:err_conn_not_ready", "Number of BSSMAP messages we tried to send when the connection was not ready yet"}, [MSC_CTR_BSSMAP_TX_ERR_SEND] = {"bssmap:tx:result:err_send", "Number of socket errors while sending BSSMAP messages"}, [MSC_CTR_BSSMAP_TX_SUCCESS] = {"bssmap:tx:result:success", "Number of successfully sent BSSMAP messages"}, /* Tx message counters (per specific message) * * Theoretically, the DT1 counters should sum up to the same number as the Tx counters * above but since these counters are coming from the upper layers, there might be * some difference if we forget some code path. */ [MSC_CTR_BSSMAP_TX_UDT_RESET] = {"bssmap:tx:udt:reset:request", "Number of transmitted BSSMAP UDT RESET messages"}, [MSC_CTR_BSSMAP_TX_UDT_RESET_ACK] = {"bssmap:tx:udt:reset:ack", "Number of transmitted BSSMAP UDT RESET ACK messages"}, [MSC_CTR_BSSMAP_TX_DT1_CLEAR_RQST] = {"bssmap:tx:dt1:clear:rqst", "Number of transmitted BSSMAP DT1 CLEAR RQSTtx messages"}, [MSC_CTR_BSSMAP_TX_DT1_CLEAR_COMPLETE] = {"bssmap:tx:dt1:clear:complete", "Number of transmitted BSSMAP DT1 CLEAR COMPLETE messages"}, [MSC_CTR_BSSMAP_TX_DT1_ASSIGMENT_FAILURE] = {"bssmap:tx:dt1:assigment:failure", "Number of transmitted BSSMAP DT1 ASSIGMENT FAILURE messages"}, [MSC_CTR_BSSMAP_TX_DT1_ASSIGMENT_COMPLETE] = {"bssmap:tx:dt1:assigment:complete", "Number of transmitted BSSMAP DT1 ASSIGMENT COMPLETE messages"}, [MSC_CTR_BSSMAP_TX_DT1_SAPI_N_REJECT] = {"bssmap:tx:dt1:sapi_n:reject", "Number of transmitted BSSMAP DT1 SAPI N REJECT messages"}, [MSC_CTR_BSSMAP_TX_DT1_CIPHER_COMPLETE] = {"bssmap:tx:dt1:cipher_mode:complete", "Number of transmitted BSSMAP DT1 CIPHER COMPLETE messages"}, [MSC_CTR_BSSMAP_TX_DT1_CIPHER_REJECT] = {"bssmap:tx:dt1:cipher_mode:reject", "Number of transmitted BSSMAP DT1 CIPHER REJECT messages"}, [MSC_CTR_BSSMAP_TX_DT1_CLASSMARK_UPDATE] = {"bssmap:tx:dt1:classmark:update", "Number of transmitted BSSMAP DT1 CLASSMARK UPDATE messages"}, [MSC_CTR_BSSMAP_TX_DT1_LCLS_CONNECT_CTRL_ACK] = {"bssmap:tx:dt1:lcls_connect_ctrl:ack", "Number of transmitted BSSMAP DT1 LCLS CONNECT CTRL ACK messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_REQUIRED] = {"bssmap:tx:dt1:handover:required", "Number of transmitted BSSMAP DT1 HANDOVER REQUIRED messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_PERFORMED] = {"bssmap:tx:dt1:handover:performed", "Number of transmitted BSSMAP DT1 HANDOVER PERFORMED messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_RQST_ACKNOWLEDGE] = {"bssmap:tx:dt1:handover:rqst_acknowledge", "Number of transmitted BSSMAP DT1 HANDOVER RQST ACKNOWLEDGE messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_DETECT] = {"bssmap:tx:dt1:handover:detect", "Number of transmitted BSSMAP DT1 HANDOVER DETECT messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_COMPLETE] = {"bssmap:tx:dt1:handover:complete", "Number of transmitted BSSMAP DT1 HANDOVER COMPLETE messages"}, [MSC_CTR_BSSMAP_TX_DT1_HANDOVER_FAILURE] = {"bssmap:tx:dt1:handover:failure", "Number of transmitted BSSMAP DT1 HANDOVER FAILURE messages"}, [MSC_CTR_BSSMAP_TX_DT1_DTAP] = {"bssmap:tx:dt1:dtap", "Number of transmitted BSSMAP DT1 DTAP messages"}, }; static const struct rate_ctr_group_desc msc_ctrg_desc = { "msc", "mobile switching center", OSMO_STATS_CLASS_GLOBAL, ARRAY_SIZE(msc_ctr_description), msc_ctr_description, }; static const struct osmo_stat_item_desc msc_stat_desc[] = { { "msc_links:active", "Number of active MSC links", "", 16, 0 }, { "msc_links:total", "Number of configured MSC links", "", 16, 0 }, }; static const struct osmo_stat_item_group_desc msc_statg_desc = { .group_name_prefix = "msc", .group_description = "mobile switching center", .class_id = OSMO_STATS_CLASS_GLOBAL, .num_items = ARRAY_SIZE(msc_stat_desc), .item_desc = msc_stat_desc, }; int osmo_bsc_msc_init(struct bsc_msc_data *msc) { struct gsm_network *net = msc->network; uint16_t mgw_port; int rc; if (net->mgw.conf->remote_port >= 0) mgw_port = net->mgw.conf->remote_port; else mgw_port = MGCP_CLIENT_REMOTE_PORT_DEFAULT; rc = osmo_sock_init2_ofd(&msc->mgcp_ipa.ofd, AF_INET, SOCK_DGRAM, IPPROTO_UDP, msc->mgcp_ipa.local_addr, msc->mgcp_ipa.local_port, net->mgw.conf->remote_addr, mgw_port, OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT); if (rc < 0) { LOGP(DMSC, LOGL_ERROR, "msc %u: Could not create/connect/bind MGCP proxy socket: %d\n", msc->nr, rc); return rc; } return 0; } struct bsc_msc_data *osmo_msc_data_find(struct gsm_network *net, int nr) { struct bsc_msc_data *msc_data; llist_for_each_entry(msc_data, &net->bsc_data->mscs, entry) if (msc_data->nr == nr) return msc_data; return NULL; } struct bsc_msc_data *osmo_msc_data_alloc(struct gsm_network *net, int nr) { struct bsc_msc_data *msc_data; unsigned int i; /* check if there is already one */ msc_data = osmo_msc_data_find(net, nr); if (msc_data) return msc_data; msc_data = talloc_zero(net, struct bsc_msc_data); if (!msc_data) return NULL; /* init statistics */ msc_data->msc_ctrs = rate_ctr_group_alloc(net, &msc_ctrg_desc, nr); if (!msc_data->msc_ctrs) { talloc_free(msc_data); return NULL; } msc_data->msc_statg = osmo_stat_item_group_alloc(net, &msc_statg_desc, nr); if (!msc_data->msc_statg) { rate_ctr_group_free(msc_data->msc_ctrs); talloc_free(msc_data); return NULL; } llist_add_tail(&msc_data->entry, &net->bsc_data->mscs); /* Init back pointer */ msc_data->network = net; msc_data->core_plmn = (struct osmo_plmn_id){ .mcc = GSM_MCC_MNC_INVALID, .mnc = GSM_MCC_MNC_INVALID, }; msc_data->core_ci = -1; msc_data->core_lac = -1; msc_data->rtp_base = 4000; msc_data->nr = nr; msc_data->allow_emerg = 1; msc_data->a.asp_proto = OSMO_SS7_ASP_PROT_M3UA; /* Defaults for the audio setup */ msc_data->amr_conf.m5_90 = 1; msc_data->amr_octet_aligned = true; /* Allow the full set of possible codecs by default */ msc_data->audio_length = 5; msc_data->audio_support = talloc_zero_array(msc_data, struct gsm_audio_support *, msc_data->audio_length); for (i = 0; i < msc_data->audio_length; i++) { msc_data->audio_support[i] = talloc_zero(msc_data->audio_support, struct gsm_audio_support); } msc_data->audio_support[0]->ver = 1; msc_data->audio_support[0]->hr = 0; msc_data->audio_support[1]->ver = 1; msc_data->audio_support[1]->hr = 1; msc_data->audio_support[2]->ver = 2; msc_data->audio_support[2]->hr = 0; msc_data->audio_support[3]->ver = 3; msc_data->audio_support[3]->hr = 0; msc_data->audio_support[4]->ver = 3; msc_data->audio_support[4]->hr = 1; osmo_fd_setup(&msc_data->mgcp_ipa.ofd, -1, BSC_FD_READ, &bsc_sccplite_mgcp_proxy_cb, msc_data, 0); msc_data->mgcp_ipa.local_addr = talloc_strdup(msc_data, "0.0.0.0"); msc_data->mgcp_ipa.local_port = 0; /* dynamic */ return msc_data; } struct osmo_cell_global_id *cgi_for_msc(struct bsc_msc_data *msc, struct gsm_bts *bts) { static struct osmo_cell_global_id cgi; cgi.lai.plmn = msc->network->plmn; if (msc->core_plmn.mcc != GSM_MCC_MNC_INVALID) cgi.lai.plmn.mcc = msc->core_plmn.mcc; if (msc->core_plmn.mnc != GSM_MCC_MNC_INVALID) { cgi.lai.plmn.mnc = msc->core_plmn.mnc; cgi.lai.plmn.mnc_3_digits = msc->core_plmn.mnc_3_digits; } cgi.lai.lac = (msc->core_lac != -1) ? msc->core_lac : bts->location_area_code; cgi.cell_identity = (msc->core_ci != -1) ? msc->core_ci : bts->cell_identity; return &cgi; }