/* gprs_bssgp_pcu.cpp * * Copyright (C) 2012 Ivan Klyuchnikov * Copyright (C) 2013 by Holger Hans Peter Freyther * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * 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 General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "coding_scheme.h" #include "tbf_dl.h" #include "llc.h" #include "gprs_rlcmac.h" #include "bts_pch_timer.h" #include "alloc_algo.h" /* Tuning parameters for BSSGP flow control */ #define FC_DEFAULT_LIFE_TIME_SECS 10 /* experimental value, 10s */ #define FC_MS_BUCKET_SIZE_BY_BMAX(bmax) ((bmax) / 2 + 500) /* experimental */ #define FC_FALLBACK_BVC_BUCKET_SIZE 2000 /* e.g. on R = 0, value taken from PCAP files */ #define FC_MS_MAX_RX_SLOTS 4 /* limit MS default R to 4 TS per MS */ /* Constants for BSSGP flow control */ #define FC_MAX_BUCKET_LEAK_RATE (6553500 / 8) /* Byte/s */ #define FC_MAX_BUCKET_SIZE 6553500 /* Octets */ extern void *tall_pcu_ctx; extern uint16_t spoof_mcc, spoof_mnc; extern bool spoof_mnc_3_digits; static const struct rate_ctr_desc sgsn_ctr_description[] = { [SGSN_CTR_RX_PAGING_CS] = { "rx_paging_cs", "Amount of paging CS requests received" }, [SGSN_CTR_RX_PAGING_PS] = { "rx_paging_ps", "Amount of paging PS requests received" }, }; static const struct rate_ctr_group_desc sgsn_ctrg_desc = { .group_name_prefix = "pcu:sgsn", .group_description = "SGSN Statistics", .class_id = OSMO_STATS_CLASS_SUBSCRIBER, .num_ctr = ARRAY_SIZE(sgsn_ctr_description), .ctr_desc = sgsn_ctr_description, }; static void bvc_timeout(void *_priv); static int parse_ra_cap(struct tlv_parsed *tp, MS_Radio_Access_capability_t *rac) { struct bitvec *block; uint8_t cap_len; uint8_t *cap; memset(rac, 0, sizeof(*rac)); if (!TLVP_PRESENT(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP)) return -EINVAL; cap_len = TLVP_LEN(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); cap = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); LOGP(DBSSGP, LOGL_DEBUG, "Got BSSGP RA Capability of size %d\n", cap_len); block = bitvec_alloc(cap_len, tall_pcu_ctx); bitvec_unpack(block, cap); /* TS 24.008, 10.5.5.12a */ decode_gsm_ra_cap(block, rac); bitvec_free(block); return 0; } static int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp) { struct bssgp_ud_hdr *budh; uint32_t tlli; uint32_t tlli_old = GSM_RESERVED_TMSI; uint8_t *data; uint16_t len; uint8_t ms_class = 0; uint8_t egprs_ms_class = 0; int rc; MS_Radio_Access_capability_t rac; const char *imsi = NULL; struct osmo_mobile_identity mi_imsi; budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg); tlli = ntohl(budh->tlli); /* LLC_PDU is mandatory IE */ if (!TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) { LOGP(DBSSGP, LOGL_NOTICE, "BSSGP TLLI=0x%08x Rx UL-UD missing mandatory IE\n", tlli); return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); } data = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU); len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); if (len > LLC_MAX_LEN) { LOGP(DBSSGP, LOGL_NOTICE, "BSSGP TLLI=0x%08x Rx UL-UD IE_LLC_PDU too large\n", tlli); return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); } /* read IMSI. if no IMSI exists, use first paging block (any paging), * because during attachment the IMSI might not be known, so the MS * will listen to all paging blocks. */ if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { rc = osmo_mobile_identity_decode(&mi_imsi, TLVP_VAL(tp, BSSGP_IE_IMSI), TLVP_LEN(tp, BSSGP_IE_IMSI), true); if (rc < 0 || mi_imsi.type != GSM_MI_TYPE_IMSI) { LOGP(DBSSGP, LOGL_NOTICE, "Failed to parse IMSI IE (rc=%d)\n", rc); return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); } imsi = &mi_imsi.imsi[0]; } /* parse ms radio access capability */ if (parse_ra_cap(tp, &rac) >= 0) { /* Get the EGPRS class from the RA capability */ ms_class = get_ms_class_by_capability(&rac); egprs_ms_class = get_egprs_ms_class_by_capability(&rac); LOGP(DBSSGP, LOGL_DEBUG, "Got downlink MS class %d/%d\n", ms_class, egprs_ms_class); } /* get lifetime */ uint16_t delay_csec = 0xffff; if (TLVP_PRESENT(tp, BSSGP_IE_PDU_LIFETIME)) { uint8_t lt_len = TLVP_LEN(tp, BSSGP_IE_PDU_LIFETIME); if (lt_len == 2) delay_csec = tlvp_val16be(tp, BSSGP_IE_PDU_LIFETIME); else LOGP(DBSSGP, LOGL_NOTICE, "BSSGP invalid length of " "PDU_LIFETIME IE\n"); } else LOGP(DBSSGP, LOGL_NOTICE, "BSSGP missing mandatory " "PDU_LIFETIME IE\n"); /* get optional TLLI old */ if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) { uint8_t tlli_len = TLVP_LEN(tp, BSSGP_IE_PDU_LIFETIME); if (tlli_len == 2) tlli_old = tlvp_val16be(tp, BSSGP_IE_TLLI); else LOGP(DBSSGP, LOGL_NOTICE, "BSSGP invalid length of " "TLLI (old) IE\n"); } LOGP(DBSSGP, LOGL_INFO, "LLC [SGSN -> PCU] = TLLI: 0x%08x IMSI: %s len: %d\n", tlli, imsi ? : "none", len); return dl_tbf_handle(the_pcu->bssgp.bts, tlli, tlli_old, imsi, ms_class, egprs_ms_class, delay_csec, data, len); } /* 3GPP TS 48.018 Table 10.3.2. Returns 0 on success, suggested BSSGP cause otherwise */ static unsigned int get_paging_cs_mi(struct paging_req_cs *req, const struct tlv_parsed *tp) { int rc; req->chan_needed = tlvp_val8(tp, BSSGP_IE_CHAN_NEEDED, 0); if (!TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { LOGP(DBSSGP, LOGL_ERROR, "IMSI Mobile Identity mandatory IE not found\n"); return BSSGP_CAUSE_MISSING_MAND_IE; } rc = osmo_mobile_identity_decode(&req->mi_imsi, TLVP_VAL(tp, BSSGP_IE_IMSI), TLVP_LEN(tp, BSSGP_IE_IMSI), true); if (rc < 0 || req->mi_imsi.type != GSM_MI_TYPE_IMSI) { LOGP(DBSSGP, LOGL_ERROR, "Invalid IMSI Mobile Identity\n"); return BSSGP_CAUSE_INV_MAND_INF; } req->mi_imsi_present = true; /* TMSI is optional */ req->mi_tmsi_present = false; if (TLVP_PRESENT(tp, BSSGP_IE_TMSI)) { /* Be safe against an evil SGSN - check the length */ if (TLVP_LEN(tp, BSSGP_IE_TMSI) != GSM23003_TMSI_NUM_BYTES) { LOGP(DBSSGP, LOGL_NOTICE, "TMSI IE has odd length (!= 4)\n"); return BSSGP_CAUSE_COND_IE_ERR; } /* NOTE: TMSI (unlike IMSI) IE comes without MI type header */ req->mi_tmsi = (struct osmo_mobile_identity){ .type = GSM_MI_TYPE_TMSI, }; req->mi_tmsi.tmsi = osmo_load32be(TLVP_VAL(tp, BSSGP_IE_TMSI)); req->mi_tmsi_present = true; } if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) req->tlli = osmo_load32be(TLVP_VAL(tp, BSSGP_IE_TLLI)); else req->tlli = GSM_RESERVED_TMSI; return 0; } static int gprs_bssgp_pcu_rx_paging_cs(struct msgb *msg, const struct tlv_parsed *tp) { struct paging_req_cs req; struct gprs_rlcmac_bts *bts; struct GprsMs *ms; int rc; rate_ctr_inc(rate_ctr_group_get_ctr(the_pcu->bssgp.ctrs, SGSN_CTR_RX_PAGING_CS)); if ((rc = get_paging_cs_mi(&req, tp)) > 0) return bssgp_tx_status((enum gprs_bssgp_cause) rc, NULL, msg); /* We need to page all BTSs since even if a BTS has a matching MS, it * may have already moved to a newer BTS. On Each BTS, if the MS is * known, then bts_add_paging() can optimize and page only on PDCHs the * target MS is using. */ llist_for_each_entry(bts, &the_pcu->bts_list, list) { /* TODO: Match by TMSI before IMSI if present?! */ ms = bts_get_ms_by_tlli(bts, req.tlli, req.tlli); if (!ms && req.mi_imsi_present) ms = bts_get_ms_by_imsi(bts, req.mi_imsi.imsi); bts_add_paging(bts, &req, ms); } return 0; } /* Returns 0 on success, suggested BSSGP cause otherwise */ static unsigned int get_paging_ps_mi(struct osmo_mobile_identity *mi, const struct tlv_parsed *tp) { /* Use TMSI (if present) or IMSI */ if (TLVP_PRESENT(tp, BSSGP_IE_TMSI)) { /* Be safe against an evil SGSN - check the length */ if (TLVP_LEN(tp, BSSGP_IE_TMSI) != GSM23003_TMSI_NUM_BYTES) { LOGP(DBSSGP, LOGL_NOTICE, "TMSI IE has odd length (!= 4)\n"); return BSSGP_CAUSE_COND_IE_ERR; } /* NOTE: TMSI (unlike IMSI) IE comes without MI type header */ *mi = (struct osmo_mobile_identity){ .type = GSM_MI_TYPE_TMSI, }; mi->tmsi = osmo_load32be(TLVP_VAL(tp, BSSGP_IE_TMSI)); } else if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { int rc = osmo_mobile_identity_decode(mi, TLVP_VAL(tp, BSSGP_IE_IMSI), TLVP_LEN(tp, BSSGP_IE_IMSI), true); if (rc < 0 || mi->type != GSM_MI_TYPE_IMSI) { LOGP(DBSSGP, LOGL_ERROR, "Invalid IMSI Mobile Identity\n"); return BSSGP_CAUSE_COND_IE_ERR; } } else { LOGP(DBSSGP, LOGL_ERROR, "Neither TMSI IE nor IMSI IE is present\n"); return BSSGP_CAUSE_MISSING_COND_IE; } return 0; } static int gprs_bssgp_pcu_rx_paging_ps(struct msgb *msg, const struct tlv_parsed *tp) { struct osmo_mobile_identity mi_imsi; struct osmo_mobile_identity paging_mi; struct gprs_rlcmac_bts *bts; int rc; rate_ctr_inc(rate_ctr_group_get_ctr(the_pcu->bssgp.ctrs, SGSN_CTR_RX_PAGING_PS)); if (!TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { LOGP(DBSSGP, LOGL_ERROR, "No IMSI\n"); return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); } rc = osmo_mobile_identity_decode(&mi_imsi, TLVP_VAL(tp, BSSGP_IE_IMSI), TLVP_LEN(tp, BSSGP_IE_IMSI), true); if (rc < 0 || mi_imsi.type != GSM_MI_TYPE_IMSI) { LOGP(DBSSGP, LOGL_NOTICE, "Failed to parse IMSI IE (rc=%d)\n", rc); return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); } if ((rc = get_paging_ps_mi(&paging_mi, tp)) > 0) return bssgp_tx_status((enum gprs_bssgp_cause) rc, NULL, msg); /* FIXME: look if MS is attached a specific BTS and then only page on that one? */ llist_for_each_entry(bts, &the_pcu->bts_list, list) { if (bts_pch_timer_get_by_imsi(bts, mi_imsi.imsi)) { LOGP(DBSSGP, LOGL_INFO, "PS-Paging request already pending for IMSI=%s\n", mi_imsi.imsi); bts_do_rate_ctr_inc(bts, CTR_PCH_REQUESTS_ALREADY); continue; } if (gprs_rlcmac_paging_request(bts, &paging_mi, mi_imsi.imsi) < 0) continue; bts_pch_timer_start(bts, &paging_mi, mi_imsi.imsi); } return 0; } /* Receive a BSSGP PDU from a BSS on a PTP BVCI */ static int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) { struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; int bvci = bctx ? bctx->bvci : -1; unsigned rc = 0; if (!bctx) return -EINVAL; /* If traffic is received on a BVC that is marked as blocked, the * received PDU shall not be accepted and a STATUS PDU (Cause value: * BVC Blocked) shall be sent to the peer entity on the signalling BVC */ if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) { uint16_t bvci = msgb_bvci(msg); LOGP(DBSSGP, LOGL_NOTICE, "rx BVC_S_BLOCKED\n"); return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg); } switch (pdu_type) { case BSSGP_PDUT_STATUS: /* already handled in libosmogb */ OSMO_ASSERT(0); break; case BSSGP_PDUT_DL_UNITDATA: LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (PTP) DL_UNITDATA\n", bvci); if (the_pcu->bssgp.on_dl_unit_data) the_pcu->bssgp.on_dl_unit_data(&the_pcu->bssgp, msg, tp); gprs_bssgp_pcu_rx_dl_ud(msg, tp); break; case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (PTP) %s\n", bvci, bssgp_pdu_str(pdu_type)); break; case BSSGP_PDUT_PAGING_CS: gprs_bssgp_pcu_rx_paging_cs(msg, tp); break; case BSSGP_PDUT_PAGING_PS: gprs_bssgp_pcu_rx_paging_ps(msg, tp); break; case BSSGP_PDUT_RA_CAPABILITY: case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: LOGP(DBSSGP, LOGL_INFO, "Rx BSSGP BVCI=%d (PTP) PDU type %s not implemented\n", bvci, bssgp_pdu_str(pdu_type)); break; /* See TS 08.18 5.4.1 */ case BSSGP_PDUT_SUSPEND: case BSSGP_PDUT_SUSPEND_ACK: case BSSGP_PDUT_SUSPEND_NACK: case BSSGP_PDUT_RESUME: case BSSGP_PDUT_RESUME_ACK: case BSSGP_PDUT_RESUME_NACK: case BSSGP_PDUT_FLUSH_LL: case BSSGP_PDUT_FLUSH_LL_ACK: case BSSGP_PDUT_LLC_DISCARD: case BSSGP_PDUT_BVC_BLOCK: case BSSGP_PDUT_BVC_BLOCK_ACK: case BSSGP_PDUT_BVC_UNBLOCK: case BSSGP_PDUT_BVC_UNBLOCK_ACK: case BSSGP_PDUT_BVC_RESET: case BSSGP_PDUT_BVC_RESET_ACK: case BSSGP_PDUT_SGSN_INVOKE_TRACE: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%u (PTP) PDU type %s unexpected at PTP\n", bctx->bvci, bssgp_pdu_str(pdu_type)); rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); break; default: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%u (PTP) PDU type %s unknown\n", bctx->bvci, bssgp_pdu_str(pdu_type)); rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); break; } return rc; } /* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */ static int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) { struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; int rc = 0; int bvci = bctx ? bctx->bvci : msgb_bvci(msg); switch (pdu_type) { case BSSGP_PDUT_STATUS: /* already handled in libosmogb */ OSMO_ASSERT(0); break; case BSSGP_PDUT_SUSPEND_ACK: case BSSGP_PDUT_RESUME_ACK: case BSSGP_PDUT_BVC_BLOCK_ACK: LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (SIGN) %s\n", bvci, bssgp_pdu_str(pdu_type)); break; case BSSGP_PDUT_BVC_RESET_ACK: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) BVC_RESET_ACK\n", bvci); if (!the_pcu->bssgp.bvc_sig_reset) the_pcu->bssgp.bvc_sig_reset = 1; else the_pcu->bssgp.bvc_reset = 1; bvc_timeout(NULL); break; case BSSGP_PDUT_PAGING_CS: gprs_bssgp_pcu_rx_paging_cs(msg, tp); break; case BSSGP_PDUT_PAGING_PS: gprs_bssgp_pcu_rx_paging_ps(msg, tp); break; case BSSGP_PDUT_BVC_UNBLOCK_ACK: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) BVC_UNBLOCK_ACK\n", bvci); the_pcu->bssgp.bvc_unblocked = 1; if (the_pcu->bssgp.on_unblock_ack) the_pcu->bssgp.on_unblock_ack(&the_pcu->bssgp); bvc_timeout(NULL); break; case BSSGP_PDUT_SUSPEND_NACK: case BSSGP_PDUT_RESUME_NACK: case BSSGP_PDUT_FLUSH_LL: case BSSGP_PDUT_SGSN_INVOKE_TRACE: LOGP(DBSSGP, LOGL_INFO, "Rx BSSGP BVCI=%d (SIGN) PDU type %s not implemented\n", bvci, bssgp_pdu_str(pdu_type)); break; /* See TS 08.18 5.4.1 */ case BSSGP_PDUT_UL_UNITDATA: case BSSGP_PDUT_DL_UNITDATA: case BSSGP_PDUT_RA_CAPABILITY: case BSSGP_PDUT_PTM_UNITDATA: case BSSGP_PDUT_RA_CAPA_UDPATE: case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: case BSSGP_PDUT_RADIO_STATUS: case BSSGP_PDUT_FLOW_CONTROL_BVC: case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: case BSSGP_PDUT_FLOW_CONTROL_MS: case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: case BSSGP_PDUT_DOWNLOAD_BSS_PFC: case BSSGP_PDUT_CREATE_BSS_PFC: case BSSGP_PDUT_CREATE_BSS_PFC_ACK: case BSSGP_PDUT_CREATE_BSS_PFC_NACK: case BSSGP_PDUT_MODIFY_BSS_PFC: case BSSGP_PDUT_MODIFY_BSS_PFC_ACK: case BSSGP_PDUT_DELETE_BSS_PFC: case BSSGP_PDUT_DELETE_BSS_PFC_ACK: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) PDU type %s unexpected at SIGN\n", bvci, bssgp_pdu_str(pdu_type)); break; default: LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) PDU type %s unknown\n", bvci, bssgp_pdu_str(pdu_type)); rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); break; } return rc; } static int gprs_bssgp_pcu_rcvmsg(struct msgb *msg) { struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); struct tlv_parsed tp; enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; uint16_t ns_bvci = msgb_bvci(msg), nsei = msgb_nsei(msg); uint16_t bvci; int data_len; int rc = 0; struct bssgp_bvc_ctx *bctx; switch (pdu_type) { case BSSGP_PDUT_STATUS: /* Pass the message to the generic BSSGP parser, which handles * STATUS and RESET messages in either direction. */ case BSSGP_PDUT_RAN_INFO: case BSSGP_PDUT_RAN_INFO_REQ: case BSSGP_PDUT_RAN_INFO_ACK: case BSSGP_PDUT_RAN_INFO_ERROR: case BSSGP_PDUT_RAN_INFO_APP_ERROR: /* Also pass all RIM related messages to the generic BSSGP * parser so that it can deliver primitive to the RIM SAP * (SAP_BSSGP_RIM) */ return bssgp_rcvmsg(msg); default: break; } /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */ /* UNITDATA BSSGP headers have TLLI in front */ if (pdu_type != BSSGP_PDUT_UL_UNITDATA && pdu_type != BSSGP_PDUT_DL_UNITDATA) { data_len = msgb_bssgp_len(msg) - sizeof(*bgph); rc = bssgp_tlv_parse(&tp, bgph->data, data_len); } else { data_len = msgb_bssgp_len(msg) - sizeof(*budh); rc = bssgp_tlv_parse(&tp, budh->data, data_len); } if (rc < 0) { LOGP(DBSSGP, LOGL_ERROR, "Failed to parse BSSGP %s message. Invalid message was: %s\n", bssgp_pdu_str(pdu_type), msgb_hexdump(msg)); return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); } if (pdu_type == BSSGP_PDUT_BVC_RESET) { if (ns_bvci != BVCI_SIGNALLING || !TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { LOGP(DBSSGP, LOGL_ERROR, "Rx an invalid BVC-RESET %s\n", msgb_hexdump(msg)); return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); } bvci = tlvp_val16be(&tp, BSSGP_IE_BVCI); if (bvci != BVCI_SIGNALLING && bvci != the_pcu->bssgp.bctx->bvci) { LOGP(DBSSGP, LOGL_ERROR, "Rx BVC-RESET for an unknown BVCI %d\n", bvci); return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci, msg); } return bssgp_rcvmsg(msg); } /* look-up or create the BTS context for this BVC */ bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg)); if (!bctx && ns_bvci != BVCI_SIGNALLING) { LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU type %s for unknown BVCI\n", nsei, ns_bvci, bssgp_pdu_str(pdu_type)); return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); } if (bctx) { log_set_context(LOG_CTX_GB_BVC, bctx); rate_ctr_inc(rate_ctr_group_get_ctr(bctx->ctrg, BSSGP_CTR_PKTS_IN)); rate_ctr_add(rate_ctr_group_get_ctr(bctx->ctrg, BSSGP_CTR_BYTES_IN), msgb_bssgp_len(msg)); } if (ns_bvci == BVCI_SIGNALLING) { LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n"); rc = gprs_bssgp_pcu_rx_sign(msg, &tp, bctx); } else if (ns_bvci == BVCI_PTM) { LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTM bssgp_tx_status\n"); rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); } else { LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTP=%u gprs_bssgp_rx_ptp\n", ns_bvci); rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx); } return rc; } static void handle_nm_status(struct osmo_bssgp_prim *bp) { enum gprs_bssgp_cause cause; LOGP(DPCU, LOGL_DEBUG, "Got NM-STATUS.ind, BVCI=%d, NSEI=%d\n", bp->bvci, bp->nsei); if (!TLVP_PRESENT(bp->tp, BSSGP_IE_CAUSE)) return; cause = (enum gprs_bssgp_cause)*TLVP_VAL(bp->tp, BSSGP_IE_CAUSE); if (cause != BSSGP_CAUSE_BVCI_BLOCKED && cause != BSSGP_CAUSE_UNKNOWN_BVCI) return; if (!TLVP_PRESENT(bp->tp, BSSGP_IE_BVCI)) return; if (the_pcu->bssgp.bctx->bvci != bp->bvci) { LOGP(DPCU, LOGL_NOTICE, "Received BSSGP STATUS message for an unknown BVCI (%d), " "ignored\n", bp->bvci); return; } switch (cause) { case BSSGP_CAUSE_BVCI_BLOCKED: if (the_pcu->bssgp.bvc_unblocked) { the_pcu->bssgp.bvc_unblocked = 0; bvc_timeout(NULL); } break; case BSSGP_CAUSE_UNKNOWN_BVCI: if (the_pcu->bssgp.bvc_reset) { the_pcu->bssgp.bvc_reset = 0; bvc_timeout(NULL); } break; default: break; } } int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) { struct osmo_bssgp_prim *bp; int rc; enum gprs_bssgp_cause cause; bp = container_of(oph, struct osmo_bssgp_prim, oph); switch (oph->sap) { case SAP_BSSGP_NM: switch (oph->primitive) { case PRIM_NM_STATUS: handle_nm_status(bp); break; case PRIM_NM_BVC_RESET: /* received a BVC PTP reset */ LOGP(DPCU, LOGL_INFO, "Rx BVC_RESET on bvci %d\n", bp->bvci); /* Rx Reset from SGSN */ if (bp->bvci == BVCI_SIGNALLING) { if (TLVP_PRES_LEN(bp->tp, BSSGP_IE_CAUSE, 1)) cause = (enum gprs_bssgp_cause)*TLVP_VAL(bp->tp, BSSGP_IE_CAUSE); else { LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u BVC RESET without cause?!\n", bp->nsei); break; } rc = bssgp_tx_bvc_ptp_reset(bp->nsei, cause); if (rc < 0) { LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u BVC PTP reset procedure failed: %d\n", bp->nsei, rc); break; } the_pcu->bssgp.bvc_sig_reset = 1; the_pcu->bssgp.bvc_reset = 0; the_pcu->bssgp.bvc_unblocked = 0; } else if (bp->bvci == the_pcu->bssgp.bctx->bvci) { the_pcu->bssgp.bvc_reset = 1; the_pcu->bssgp.bvc_unblocked = 0; bvc_timeout(NULL); } break; } break; case SAP_BSSGP_RIM: return handle_rim(bp); default: break; } return 0; } void gprs_ns_prim_status_cb(struct osmo_gprs_ns2_prim *nsp) { switch (nsp->u.status.cause) { case GPRS_NS2_AFF_CAUSE_SNS_CONFIGURED: LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d SNS configured.\n", nsp->nsei); break; case GPRS_NS2_AFF_CAUSE_RECOVERY: LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became available\n", nsp->nsei); if (!the_pcu->bssgp.nsvc_unblocked) { the_pcu->bssgp.bvc_sig_reset = 0; the_pcu->bssgp.bvc_reset = 0; the_pcu->bssgp.nsvc_unblocked = 1; bvc_timeout(NULL); } break; case GPRS_NS2_AFF_CAUSE_FAILURE: LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became unavailable\n", nsp->nsei); if (the_pcu->bssgp.nsvc_unblocked) { the_pcu->bssgp.nsvc_unblocked = 0; osmo_timer_del(&the_pcu->bssgp.bvc_timer); the_pcu->bssgp.bvc_sig_reset = 0; the_pcu->bssgp.bvc_reset = 0; the_pcu->bssgp.bvc_unblocked = 0; } break; case GPRS_NS2_AFF_CAUSE_SNS_FAILURE: break; default: LOGP(DPCU, LOGL_DEBUG, "NS: %s Unknown affecting cause %s / %d from NS\n", get_value_string(osmo_prim_op_names, nsp->oph.operation), gprs_ns2_aff_cause_prim_str(nsp->u.status.cause), nsp->u.status.cause); break; } } /* called by the ns layer */ int gprs_ns_prim_cb(struct osmo_prim_hdr *oph, void *ctx) { struct osmo_gprs_ns2_prim *nsp; int rc = 0; if (oph->sap != SAP_NS) return 0; nsp = container_of(oph, struct osmo_gprs_ns2_prim, oph); if (oph->operation != PRIM_OP_INDICATION) { LOGP(DPCU, LOGL_NOTICE, "NS: %s Unknown prim %d from NS\n", get_value_string(osmo_prim_op_names, oph->operation), oph->operation); goto out; } switch (oph->primitive) { case GPRS_NS2_PRIM_UNIT_DATA: /* hand the message into the BSSGP implementation */ /* add required msg fields for Gb layer */ msgb_bssgph(oph->msg) = oph->msg->l3h; msgb_bvci(oph->msg) = nsp->bvci; msgb_nsei(oph->msg) = nsp->nsei; rc = gprs_bssgp_pcu_rcvmsg(oph->msg); break; case GPRS_NS2_PRIM_STATUS: gprs_ns_prim_status_cb(nsp); break; case GPRS_NS2_PRIM_CONGESTION: break; default: LOGP(DPCU, LOGL_DEBUG, "NS: %s Unknown prim %s / %d from NS\n", get_value_string(osmo_prim_op_names, oph->operation), gprs_ns2_prim_str((enum gprs_ns2_prim) oph->primitive), oph->primitive); break; } out: if (oph->msg) msgb_free(oph->msg); return rc; } /* called by the bssgp layer to send NS PDUs */ int gprs_gp_send_cb(void *ctx, struct msgb *msg) { struct gprs_ns2_inst *nsi = (struct gprs_ns2_inst *) ctx; struct osmo_gprs_ns2_prim nsp = {}; nsp.nsei = msgb_nsei(msg); nsp.bvci = msgb_bvci(msg); osmo_prim_init(&nsp.oph, SAP_NS, GPRS_NS2_PRIM_UNIT_DATA, PRIM_OP_REQUEST, msg); return gprs_ns2_recv_prim(nsi, &nsp.oph); } static unsigned count_pdch(const struct gprs_rlcmac_bts *bts) { size_t trx_no, ts_no; unsigned num_pdch = 0; for (trx_no = 0; trx_no < ARRAY_SIZE(bts->trx); ++trx_no) { const struct gprs_rlcmac_trx *trx = &bts->trx[trx_no]; for (ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { const struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; if (pdch_is_enabled(pdch)) num_pdch += 1; } } return num_pdch; } static uint32_t gprs_bssgp_max_leak_rate(enum CodingScheme cs, int num_pdch) { int bytes_per_rlc_block = mcs_max_data_block_bytes(cs) * num_data_blocks(mcs_header_type(cs)); /* n byte payload per 20ms */ return bytes_per_rlc_block * (1000 / 20) * num_pdch; } static uint32_t compute_bucket_size(struct gprs_rlcmac_bts *bts, uint32_t leak_rate, uint32_t fallback) { uint32_t bucket_size = 0; uint16_t bucket_time = the_pcu->vty.fc_bucket_time; if (bucket_time == 0) bucket_time = the_pcu->vty.force_llc_lifetime; if (bucket_time == 0xffff) bucket_size = FC_MAX_BUCKET_SIZE; if (bucket_size == 0 && bucket_time && leak_rate) bucket_size = (uint64_t)leak_rate * bucket_time / 100; if (bucket_size == 0 && leak_rate) bucket_size = leak_rate * FC_DEFAULT_LIFE_TIME_SECS; if (bucket_size == 0) bucket_size = fallback; if (bucket_size > FC_MAX_BUCKET_SIZE) bucket_size = FC_MAX_BUCKET_SIZE; return bucket_size; } static uint32_t get_and_reset_avg_queue_delay(void) { struct timespec *delay_sum = &the_pcu->bssgp.queue_delay_sum; uint32_t delay_sum_ms = delay_sum->tv_sec * 1000 + delay_sum->tv_nsec / 1000000000; uint32_t avg_delay_ms = 0; if (the_pcu->bssgp.queue_delay_count > 0) avg_delay_ms = delay_sum_ms / the_pcu->bssgp.queue_delay_count; /* Reset accumulator */ delay_sum->tv_sec = delay_sum->tv_nsec = 0; the_pcu->bssgp.queue_delay_count = 0; return avg_delay_ms; } static int get_and_reset_measured_leak_rate(int *usage_by_1000, unsigned num_pdch) { int rate; /* byte per second */ if (the_pcu->bssgp.queue_frames_sent == 0) return -1; if (the_pcu->bssgp.queue_frames_recv == 0) return -1; *usage_by_1000 = the_pcu->bssgp.queue_frames_recv * 1000 / the_pcu->bssgp.queue_frames_sent; /* 20ms/num_pdch is the average RLC block duration, so the rate is * calculated as: * rate = bytes_recv / (block_dur * block_count) */ rate = the_pcu->bssgp.queue_bytes_recv * 1000 * num_pdch / (20 * the_pcu->bssgp.queue_frames_recv); the_pcu->bssgp.queue_frames_sent = 0; the_pcu->bssgp.queue_bytes_recv = 0; the_pcu->bssgp.queue_frames_recv = 0; return rate; } static enum CodingScheme max_coding_scheme_dl(struct gprs_rlcmac_bts *bts) { int num = 0; int i; bool mcs_any = false; /* First check if we support any MCS: */ for (i = 8; i >= 0; i--) { if (bts->mcs_mask & (1 << i)) { num = i + 1; mcs_any = true; break; } } if (mcs_any) { if (!the_pcu->vty.cs_adj_enabled) { if (bts->initial_mcs_dl) { num = bts->initial_mcs_dl; } else { /* We found "num" for free in the loop above */ } } else if (bts_max_mcs_dl(bts)) { num = bts_max_mcs_dl(bts); } else { num = 9; } if (num) return mcs_get_egprs_by_num(num); } if (!the_pcu->vty.cs_adj_enabled) { if (bts->initial_cs_dl) { num = bts->initial_cs_dl; } else { for (i = 3; i >= 0; i--) { if (bts->cs_mask & (1 << i)) { num = i + 1; break; } } } } else if (bts_max_cs_dl(bts)) { num = bts_max_cs_dl(bts); } if (!num) num = 4; return mcs_get_gprs_by_num(num); } static int gprs_bssgp_tx_fc_bvc(void) { struct gprs_rlcmac_bts *bts; uint32_t bucket_size; /* oct */ uint32_t ms_bucket_size; /* oct */ uint32_t leak_rate; /* oct/s */ uint32_t ms_leak_rate; /* oct/s */ uint32_t avg_delay_ms; int num_pdch = -1; enum CodingScheme max_cs_dl; if (!the_pcu->bssgp.bctx) { LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); return -EIO; } /* FIXME: This calculation needs to be redone to support multiple BTS */ bts = llist_first_entry_or_null(&the_pcu->bts_list, struct gprs_rlcmac_bts, list); if (!bts) { LOGP(DBSSGP, LOGL_ERROR, "No bts\n"); return -EIO; } max_cs_dl = max_coding_scheme_dl(bts); bucket_size = the_pcu->vty.fc_bvc_bucket_size; leak_rate = the_pcu->vty.fc_bvc_leak_rate; ms_bucket_size = the_pcu->vty.fc_ms_bucket_size; ms_leak_rate = the_pcu->vty.fc_ms_leak_rate; /* FIXME: This calculation is mostly wrong. It should be done based on currently established TBF (and whether the related (egprs)_ms_class as per which CS/MCS they support). */ if (leak_rate == 0) { int meas_rate; int usage; /* in 0..1000 */ if (num_pdch < 0) num_pdch = count_pdch(bts); meas_rate = get_and_reset_measured_leak_rate(&usage, num_pdch); if (meas_rate > 0) { leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, num_pdch); leak_rate = (meas_rate * usage + leak_rate * (1000 - usage)) / 1000; LOGP(DBSSGP, LOGL_DEBUG, "Estimated BVC leak rate = %d " "(measured %d, usage %d%%)\n", leak_rate, meas_rate, usage/10); } } if (leak_rate == 0) { if (num_pdch < 0) num_pdch = count_pdch(bts); leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, num_pdch); LOGP(DBSSGP, LOGL_DEBUG, "Computed BVC leak rate = %d, num_pdch = %d, cs = %s\n", leak_rate, num_pdch, mcs_name(max_cs_dl)); }; if (ms_leak_rate == 0) { int ms_num_pdch; int max_pdch = gprs_alloc_max_dl_slots_per_ms(bts, 0); if (num_pdch < 0) num_pdch = count_pdch(bts); ms_num_pdch = num_pdch; if (max_pdch > FC_MS_MAX_RX_SLOTS) max_pdch = FC_MS_MAX_RX_SLOTS; if (ms_num_pdch > max_pdch) ms_num_pdch = max_pdch; ms_leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, ms_num_pdch); /* TODO: To properly support multiple TRX, the per MS leak rate * should be derived from the max number of PDCH TS per TRX. */ LOGP(DBSSGP, LOGL_DEBUG, "Computed MS default leak rate = %d, ms_num_pdch = %d, " "cs = %s\n", ms_leak_rate, ms_num_pdch, mcs_name(max_cs_dl)); }; /* TODO: Force leak_rate to 0 on buffer bloat */ if (bucket_size == 0) bucket_size = compute_bucket_size(bts, leak_rate, FC_FALLBACK_BVC_BUCKET_SIZE); if (ms_bucket_size == 0) ms_bucket_size = compute_bucket_size(bts, ms_leak_rate, FC_MS_BUCKET_SIZE_BY_BMAX(bucket_size)); if (leak_rate > FC_MAX_BUCKET_LEAK_RATE) leak_rate = FC_MAX_BUCKET_LEAK_RATE; if (ms_leak_rate > FC_MAX_BUCKET_LEAK_RATE) ms_leak_rate = FC_MAX_BUCKET_LEAK_RATE; /* Avg queue delay monitoring */ avg_delay_ms = get_and_reset_avg_queue_delay(); /* Update tag */ the_pcu->bssgp.fc_tag += 1; LOGP(DBSSGP, LOGL_DEBUG, "Sending FLOW CONTROL BVC, Bmax = %d, R = %d, Bmax_MS = %d, " "R_MS = %d, avg_dly = %d\n", bucket_size, leak_rate, ms_bucket_size, ms_leak_rate, avg_delay_ms); return bssgp_tx_fc_bvc(the_pcu->bssgp.bctx, the_pcu->bssgp.fc_tag, bucket_size, leak_rate, ms_bucket_size, ms_leak_rate, NULL, &avg_delay_ms); } static void bvc_timeout(void *_priv) { unsigned long secs; if (!the_pcu->bssgp.bvc_sig_reset) { LOGP(DBSSGP, LOGL_INFO, "Sending reset on BVCI 0\n"); bssgp_tx_bvc_reset(the_pcu->bssgp.bctx, 0, BSSGP_CAUSE_OML_INTERV); secs = osmo_tdef_get(the_pcu->T_defs, -102, OSMO_TDEF_S, -1); osmo_timer_schedule(&the_pcu->bssgp.bvc_timer, secs, 0); return; } if (!the_pcu->bssgp.bvc_reset) { LOGP(DBSSGP, LOGL_INFO, "Sending reset on BVCI %d\n", the_pcu->bssgp.bctx->bvci); bssgp_tx_bvc_reset(the_pcu->bssgp.bctx, the_pcu->bssgp.bctx->bvci, BSSGP_CAUSE_OML_INTERV); secs = osmo_tdef_get(the_pcu->T_defs, -102, OSMO_TDEF_S, -1); osmo_timer_schedule(&the_pcu->bssgp.bvc_timer, secs, 0); return; } if (!the_pcu->bssgp.bvc_unblocked) { LOGP(DBSSGP, LOGL_INFO, "Sending unblock on BVCI %d\n", the_pcu->bssgp.bctx->bvci); bssgp_tx_bvc_unblock(the_pcu->bssgp.bctx); secs = osmo_tdef_get(the_pcu->T_defs, -101, OSMO_TDEF_S, -1); osmo_timer_schedule(&the_pcu->bssgp.bvc_timer, secs, 0); return; } LOGP(DBSSGP, LOGL_DEBUG, "Sending flow control info on BVCI %d\n", the_pcu->bssgp.bctx->bvci); gprs_bssgp_tx_fc_bvc(); osmo_timer_schedule(&the_pcu->bssgp.bvc_timer, the_pcu->vty.fc_interval, 0); } /*! configure NS layer * * \param bts pointer to the bts object * \param nsei the NSEI of the BSS * \param local pointer to an array of local address to bind on. * \param remote pointer to an array of remote address SGSNs. If dynamic IP-SNS is used remote is used as initial SGSN endpoints. * \param nsvci pointer to an array of nsvcis * \param valid bitmask. a 1 means the position in the array contains a valid entry for local, remote, nsvci * \returns 0 if the configuration has succeeded. on error != 0 */ static int ns_configure_nse(struct gprs_rlcmac_bts *bts, uint16_t nsei, const struct osmo_sockaddr *local, const struct osmo_sockaddr *remote, const uint16_t *nsvci, uint16_t valid) { unsigned int i; int rc; uint16_t binds = 0; bool nsvcs = false; struct gprs_ns2_vc *nsvc; struct gprs_ns2_vc_bind *bind[PCU_IF_NUM_NSVC] = { }; char name[16]; bool sns_configured = false; if (!valid) return -1; bts->nse = gprs_ns2_nse_by_nsei(the_pcu->nsi, nsei); if (!bts->nse) bts->nse = gprs_ns2_create_nse(the_pcu->nsi, nsei, GPRS_NS2_LL_UDP, the_pcu->vty.ns_dialect); if (!bts->nse) { LOGP(DBSSGP, LOGL_ERROR, "Failed to create NSE\n"); return -1; } for (i = 0; i < PCU_IF_NUM_NSVC; i++) { if (!(valid & (1 << i))) continue; bind[i] = gprs_ns2_ip_bind_by_sockaddr(the_pcu->nsi, &local[i]); if (!bind[i]) { snprintf(name, sizeof(name), "pcu%u", i); rc = gprs_ns2_ip_bind(the_pcu->nsi, name, &local[i], 0, &bind[i]); if (rc < 0) { LOGP(DBSSGP, LOGL_ERROR, "Failed to bind to %s\n", osmo_sockaddr_to_str(&local[i])); continue; } if (the_pcu->vty.ns_dialect == GPRS_NS2_DIALECT_SNS) { rc = gprs_ns2_sns_add_bind(bts->nse, bind[i]); if (rc < 0) { LOGP(DBSSGP, LOGL_ERROR, "Failed to add bind %s to the NSE for IP-SNS\n", osmo_sockaddr_to_str(&local[i])); continue; } } if (the_pcu->vty.ns_ip_dscp != -1) gprs_ns2_ip_bind_set_dscp(bind[i], the_pcu->vty.ns_ip_dscp); if (the_pcu->vty.ns_priority != -1) gprs_ns2_ip_bind_set_priority(bind[i], the_pcu->vty.ns_priority); } binds |= 1 << i; } if (!binds) { LOGP(DBSSGP, LOGL_ERROR, "Failed to bind to any NS-VC\n"); gprs_ns2_free_nses(the_pcu->nsi); return -1; } for (i = 0; i < PCU_IF_NUM_NSVC; i++) { if (!(binds & (1 << i))) continue; if (the_pcu->vty.ns_dialect == GPRS_NS2_DIALECT_SNS) { rc = gprs_ns2_sns_add_endpoint(bts->nse, &remote[i]); if (rc && rc != -EALREADY) { LOGP(DBSSGP, LOGL_ERROR, "Failed to add SNS endpoint %s!\n", osmo_sockaddr_to_str(&remote[i])); return rc; } else { sns_configured = true; } } else { nsvc = gprs_ns2_ip_connect(bind[i], &remote[i], bts->nse, nsvci[i]); if (nsvc) nsvcs = true; else LOGP(DBSSGP, LOGL_ERROR, "Failed to connect to towards SGSN %s!\n", osmo_sockaddr_to_str(&remote[i])); } } if (the_pcu->vty.ns_dialect == GPRS_NS2_DIALECT_SNS) return sns_configured ? 0 : -1; else return nsvcs ? 0 : -1; } struct nsvc_cb { const struct osmo_sockaddr *local; const struct osmo_sockaddr *remote; const uint16_t *nsvci; /* [in] bitmask of valid nsvc in local/remote */ uint16_t valid; /* [out] bitmask of found nsvcs */ uint16_t found; }; static int ns_conf_vc_cb(struct gprs_ns2_vc *nsvc, void *ctx) { struct nsvc_cb *data = (struct nsvc_cb *) ctx; unsigned int i; for (i = 0; i < PCU_IF_NUM_NSVC; i++) { if (!(data->valid & (1 << i))) continue; if (data->found & (1 << i)) continue; if (gprs_ns2_ip_vc_equal(nsvc, &data->local[i], &data->remote[i], data->nsvci[i])) { data->found |= 1 << i; return 0; } } /* Found an extra nsvc */ LOGP(DBSSGP, LOGL_DEBUG, " Removing NSVC %s\n", gprs_ns2_ll_str(nsvc)); gprs_ns2_free_nsvc(nsvc); return 0; } /* update the ns configuration if needed */ int gprs_ns_update_config(struct gprs_rlcmac_bts *bts, uint16_t nsei, const struct osmo_sockaddr *local, const struct osmo_sockaddr *remote, uint16_t *nsvci, uint16_t valid) { int rc = 0; if (!bts->nse) { /* there shouldn't any previous state. */ gprs_ns2_free_nses(the_pcu->nsi); gprs_ns2_free_binds(the_pcu->nsi); rc = ns_configure_nse(bts, nsei, local, remote, nsvci, valid); } else if (nsei != gprs_ns2_nse_nsei(bts->nse)) { /* the NSEI has changed */ gprs_ns2_free_nses(the_pcu->nsi); gprs_ns2_free_binds(the_pcu->nsi); rc = ns_configure_nse(bts, nsei, local, remote, nsvci, valid); } else if (the_pcu->vty.ns_dialect == GPRS_NS2_DIALECT_SNS) { /* SNS: check if the initial nsvc is the same, if not recreate it */ const struct osmo_sockaddr *initial = gprs_ns2_nse_sns_remote(bts->nse); unsigned int i; for (i = 0; i < PCU_IF_NUM_NSVC; i++) { if (!(valid & (1 << i))) continue; /* found the initial - everything should be fine */ if (!osmo_sockaddr_cmp(initial, &remote[i])) return 0; } gprs_ns2_free_nses(the_pcu->nsi); gprs_ns2_free_binds(the_pcu->nsi); rc = ns_configure_nse(bts, nsei, local, remote, nsvci, valid); } else { /* check if all NSVC are still the same. */ struct nsvc_cb data = { .local = &local[0], .remote = &remote[0], .nsvci = &nsvci[0], .valid = valid, .found = 0, }; /* search the current active nsvcs */ gprs_ns2_nse_foreach_nsvc(bts->nse, &ns_conf_vc_cb, &data); /* we found all our valid nsvcs and might have removed all other nsvcs */ if (valid == data.found) return 0; /* remove all found nsvcs from the valid field */ valid &= ~data.found; rc = ns_configure_nse(bts, nsei, local, remote, nsvci, valid); } if (rc) LOGP(DBSSGP, LOGL_ERROR, "Failed to connect!\n"); return rc; } struct gprs_bssgp_pcu *gprs_bssgp_init( struct gprs_rlcmac_bts *bts, uint16_t nsei, uint16_t bvci, uint16_t mcc, uint16_t mnc, bool mnc_3_digits, uint16_t lac, uint16_t rac, uint16_t cell_id) { /* if already created... return the current address */ if (the_pcu->bssgp.bctx) return &the_pcu->bssgp; the_pcu->bssgp.bts = bts; the_pcu->bssgp.bctx = btsctx_alloc(bvci, nsei); if (!the_pcu->bssgp.bctx) { LOGP(DBSSGP, LOGL_ERROR, "Failed to create BSSGP context\n"); the_pcu->bssgp.bts->nse = NULL; return NULL; } the_pcu->bssgp.bctx->is_sgsn = false; the_pcu->bssgp.bctx->ra_id.mcc = spoof_mcc ? : mcc; if (spoof_mnc) { the_pcu->bssgp.bctx->ra_id.mnc = spoof_mnc; the_pcu->bssgp.bctx->ra_id.mnc_3_digits = spoof_mnc_3_digits; } else { the_pcu->bssgp.bctx->ra_id.mnc = mnc; the_pcu->bssgp.bctx->ra_id.mnc_3_digits = mnc_3_digits; } the_pcu->bssgp.bctx->ra_id.lac = lac; the_pcu->bssgp.bctx->ra_id.rac = rac; the_pcu->bssgp.bctx->cell_id = cell_id; osmo_timer_setup(&the_pcu->bssgp.bvc_timer, bvc_timeout, bts); the_pcu->bssgp.ctrs = rate_ctr_group_alloc(the_pcu, &sgsn_ctrg_desc, 0); OSMO_ASSERT(the_pcu->bssgp.ctrs) return &the_pcu->bssgp; } void gprs_bssgp_destroy(struct gprs_rlcmac_bts *bts) { rate_ctr_group_free(the_pcu->bssgp.ctrs); osmo_timer_del(&the_pcu->bssgp.bvc_timer); /* FIXME: blocking... */ the_pcu->bssgp.nsvc_unblocked = 0; the_pcu->bssgp.bvc_sig_reset = 0; the_pcu->bssgp.bvc_reset = 0; the_pcu->bssgp.bvc_unblocked = 0; bssgp_bvc_ctx_free(the_pcu->bssgp.bctx); the_pcu->bssgp.bctx = NULL; gprs_ns2_free(the_pcu->nsi); the_pcu->nsi = NULL; bts->nse = NULL; } void gprs_bssgp_update_frames_sent() { the_pcu->bssgp.queue_frames_sent += 1; } void gprs_bssgp_update_bytes_received(unsigned bytes_recv, unsigned frames_recv) { the_pcu->bssgp.queue_bytes_recv += bytes_recv; the_pcu->bssgp.queue_frames_recv += frames_recv; } void gprs_bssgp_update_queue_delay(const struct timespec *tv_recv, const struct timespec *tv_now) { struct timespec *delay_sum = &the_pcu->bssgp.queue_delay_sum; struct timespec tv_delay; timespecsub(tv_now, tv_recv, &tv_delay); timespecadd(delay_sum, &tv_delay, delay_sum); the_pcu->bssgp.queue_delay_count += 1; }