diff options
Diffstat (limited to 'src/osmo-bsc/abis_rsl.c')
| -rw-r--r-- | src/osmo-bsc/abis_rsl.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/src/osmo-bsc/abis_rsl.c b/src/osmo-bsc/abis_rsl.c index 0b68d7c53..06d19a5d5 100644 --- a/src/osmo-bsc/abis_rsl.c +++ b/src/osmo-bsc/abis_rsl.c @@ -1,7 +1,7 @@ /* GSM Radio Signalling Link messages on the A-bis interface * 3GPP TS 08.58 version 8.6.0 Release 1999 / ETSI TS 100 596 V8.6.0 */ -/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> +/* (C) 2008-2019 by Harald Welte <laforge@gnumonks.org> * (C) 2012 by Holger Hans Peter Freyther * * All Rights Reserved @@ -52,6 +52,7 @@ #include <osmocom/bsc/lchan_fsm.h> #include <osmocom/bsc/lchan_rtp_fsm.h> #include <osmocom/bsc/handover_fsm.h> +#include <osmocom/bsc/smscb.h> #define RSL_ALLOC_SIZE 1024 #define RSL_ALLOC_HEADROOM 128 @@ -1489,6 +1490,36 @@ static int rsl_rx_ccch_load(struct msgb *msg) return 0; } +/* 8.5.9 current load on the CBCH (Cell Broadcast) */ +static int rsl_rx_cbch_load(struct msgb *msg) +{ + struct e1inp_sign_link *sign_link = msg->dst; + struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); + struct gsm_bts *bts = sign_link->trx->bts; + bool cbch_extended = false; + bool is_overflow = false; + int8_t load_info; + struct tlv_parsed tp; + uint8_t slot_count; + + rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg) - sizeof(*rslh)); + if (!TLVP_PRESENT(&tp, RSL_IE_CBCH_LOAD_INFO)) { + LOG_BTS(bts, DRSL, LOGL_ERROR, "CBCH LOAD IND without mandatory CBCH Load Info IE\n"); + return -1; + } + /* 9.4.43 */ + load_info = *TLVP_VAL(&tp, RSL_IE_CBCH_LOAD_INFO); + if (load_info & 0x80) + is_overflow = true; + slot_count = load_info & 0x0F; + + if (TLVP_PRES_LEN(&tp, RSL_IE_SMSCB_CHAN_INDICATOR, 1) && + (*TLVP_VAL(&tp, RSL_IE_SMSCB_CHAN_INDICATOR) & 0x0F) == 0x01) + cbch_extended = true; + + return bts_smscb_rx_cbch_load_ind(bts, cbch_extended, is_overflow, slot_count); +} + /* Ericsson specific: Immediate Assign Sent */ static int rsl_rx_ericsson_imm_assign_sent(struct msgb *msg) { @@ -1537,7 +1568,7 @@ static int abis_rsl_rx_cchan(struct msgb *msg) break; case RSL_MT_CBCH_LOAD_IND: /* current load on the CBCH */ - /* FIXME: handle this. Ignore for now */ + rc = rsl_rx_cbch_load(msg); break; case RSL_MT_ERICSSON_IMM_ASS_SENT: rc = rsl_rx_ericsson_imm_assign_sent(msg); |