diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2013-03-10 09:45:26 +0100 |
|---|---|---|
| committer | Neels Hofmeyr <neels@hofmeyr.de> | 2017-12-01 03:37:42 +0100 |
| commit | e9d06be699f53d9e5117a9b31f822a2f61ab715c (patch) | |
| tree | 4b60453abe07bcb73e0f03a95282c8bedd431b0b /src/libmsc | |
| parent | 343ca64ca1b51faa472ac34d6cc34f7d7398393c (diff) | |
Each BTS can be configured for speech support (other than GSM full rate)
Speech codings which are not supported by BTS will be removed from the
bearer capability information element after parsing. This way it is not
required for the MNCC application to consider support of each BTS.
Only GSM full rate is supported by default.
Diffstat (limited to 'src/libmsc')
| -rw-r--r-- | src/libmsc/gsm_04_08.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c index 0767c722f..45d132e1b 100644 --- a/src/libmsc/gsm_04_08.c +++ b/src/libmsc/gsm_04_08.c @@ -79,6 +79,29 @@ struct gsm_lai { uint16_t lac; }; +static int apply_codec_restrictions(struct gsm_bts *bts, + struct gsm_mncc_bearer_cap *bcap) +{ + int i, j; + + /* remove unsupported speech versions from list */ + for (i = 0, j = 0; bcap->speech_ver[i] >= 0; i++) { + if (bcap->speech_ver[i] == 0) + bcap->speech_ver[j++] = 0; + if (bcap->speech_ver[i] == 2 && bts->codec.efr) + bcap->speech_ver[j++] = 2; + if (bcap->speech_ver[i] == 4 && bts->codec.afs) + bcap->speech_ver[j++] = 4; + if (bcap->speech_ver[i] == 1 && bts->codec.hr) + bcap->speech_ver[j++] = 1; + if (bcap->speech_ver[i] == 5 && bts->codec.ahs) + bcap->speech_ver[j++] = 5; + } + bcap->speech_ver[j] = -1; + + return 0; +} + static uint32_t new_callref = 0x80000001; void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg) @@ -1914,6 +1937,7 @@ static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg) setup.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&setup.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &setup.bearer_cap); } /* facility */ if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { @@ -2067,6 +2091,7 @@ static int gsm48_cc_rx_call_conf(struct gsm_trans *trans, struct msgb *msg) call_conf.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&call_conf.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &call_conf.bearer_cap); } /* cause */ if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { @@ -2755,6 +2780,7 @@ static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg) modify.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY); @@ -2797,6 +2823,7 @@ static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans, struct msgb *msg modify.fields |= MNCC_F_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } new_cc_state(trans, GSM_CSTATE_ACTIVE); @@ -2837,6 +2864,7 @@ static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg) modify.fields |= GSM48_IE_BEARER_CAP; gsm48_decode_bearer_cap(&modify.bearer_cap, TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); + apply_codec_restrictions(trans->conn->bts, &modify.bearer_cap); } /* cause */ if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |