/*! \brief receive a traffic L1 primitive for a given lchan */
int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg)
{
GsmL1_Prim_t *l1p = msgb_l1prim(l1p_msg);
GsmL1_PhDataInd_t *data_ind = &l1p->u.phDataInd;
uint8_t payload_type = data_ind->msgUnitParam.u8Buffer[0];
uint8_t *payload = data_ind->msgUnitParam.u8Buffer + 1;
uint8_t payload_len, sid_first[7] = {0};
struct msgb *rmsg = NULL;
struct gsm_lchan *lchan = &trx->ts[L1SAP_CHAN2TS(chan_nr)].lchan[l1sap_chan2ss(chan_nr)];
if (is_recv_only(lchan->abis_ip.speech_mode))
return -EAGAIN;
if (data_ind->msgUnitParam.u8Size < 1) {
LOGP(DL1C, LOGL_ERROR, "chan_nr %d Rx Payload size 0\n",
chan_nr);
return -EINVAL;
}
payload_len = data_ind->msgUnitParam.u8Size - 1;
switch (payload_type) {
case GsmL1_TchPlType_Fr:
#if defined(L1_HAS_EFR) && defined(USE_L1_RTP_MODE)
case GsmL1_TchPlType_Efr:
#endif
if (lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
break;
case GsmL1_TchPlType_Hr:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
break;
case GsmL1_TchPlType_Amr:
if (lchan->type != GSM_LCHAN_TCH_H &&
lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
break;
case GsmL1_TchPlType_Amr_Onset:
if (lchan->type != GSM_LCHAN_TCH_H &&
lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
/* according to 3GPP TS 26.093 ONSET frames precede the first
speech frame of a speech burst - set the marker for next RTP
frame */
lchan->rtp_tx_marker = true;
break;
case GsmL1_TchPlType_Amr_SidFirstP1:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
LOGP(DL1C, LOGL_DEBUG, "DTX: received SID_FIRST_P1 from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidFirstP2:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
LOGP(DL1C, LOGL_DEBUG, "DTX: received SID_FIRST_P2 from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidFirstInH:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
lchan->rtp_tx_marker = true;
LOGP(DL1C, LOGL_DEBUG, "DTX: received SID_FIRST_INH from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidUpdateInH:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
lchan->rtp_tx_marker = true;
LOGP(DL1C, LOGL_DEBUG, "DTX: received SID_UPDATE_INH from L1 "
"(%d bytes)\n", payload_len);
break;
default:
LOGP(DL1C, LOGL_NOTICE, "%s Rx Payload Type %s is unsupported\n",
gsm_lchan_name(lchan),
get_value_string(femtobts_tch_pl_names, payload_type));
break;
}
switch (payload_type) {
case GsmL1_TchPlType_Fr:
rmsg = l1_to_rtppayload_fr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Hr:
rmsg = l1_to_rtppayload_hr(payload, payload_len, lchan);
break;
#if defined(L1_HAS_EFR) && defined(USE_L1_RTP_MODE)
case GsmL1_TchPlType_Efr:
rmsg = l1_to_rtppayload_efr(payload, payload_len, lchan);
break;
#endif
case GsmL1_TchPlType_Amr:
rmsg = l1_to_rtppayload_amr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Amr_SidFirstP1:
memcpy(sid_first, payload, payload_len);
int len = osmo_amr_rtp_enc(sid_first, 0, AMR_SID, AMR_GOOD);
if (len < 0)
return 0;
rmsg = l1_to_rtppayload_amr(sid_first, len, lchan);
break;
}
if (rmsg)
return add_l1sap_header(trx, rmsg, lchan, chan_nr,
data_ind->u32Fn);
return 0;
err_payload_match:
LOGP(DL1C, LOGL_ERROR, "%s Rx Payload Type %s incompatible with lchan\n",
gsm_lchan_name(lchan),
get_value_string(femtobts_tch_pl_names, payload_type));
return -EINVAL;
}
/*! \brief receive a traffic L1 primitive for a given lchan */
int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg)
{
GsmL1_Prim_t *l1p = msgb_l1prim(l1p_msg);
GsmL1_PhDataInd_t *data_ind = &l1p->u.phDataInd;
uint8_t *payload, payload_type, payload_len, sid_first[9] = { 0 };
struct msgb *rmsg = NULL;
struct gsm_lchan *lchan = &trx->ts[L1SAP_CHAN2TS(chan_nr)].lchan[l1sap_chan2ss(chan_nr)];
if (is_recv_only(lchan->abis_ip.speech_mode))
return -EAGAIN;
if (data_ind->msgUnitParam.u8Size < 1) {
LOGPFN(DL1P, LOGL_DEBUG, data_ind->u32Fn, "chan_nr %d Rx Payload size 0\n", chan_nr);
/* Push empty payload to upper layers */
rmsg = msgb_alloc_headroom(256, 128, "L1P-to-RTP");
return add_l1sap_header(trx, rmsg, lchan, chan_nr, data_ind->u32Fn,
data_ind->measParam.fBer * 10000,
data_ind->measParam.fLinkQuality * 10);
}
payload_type = data_ind->msgUnitParam.u8Buffer[0];
payload = data_ind->msgUnitParam.u8Buffer + 1;
payload_len = data_ind->msgUnitParam.u8Size - 1;
/* clear RTP marker if the marker has previously sent */
if (!lchan->tch.dtx.is_speech_resume)
lchan->rtp_tx_marker = false;
switch (payload_type) {
case GsmL1_TchPlType_Fr:
case GsmL1_TchPlType_Efr:
if (lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
break;
case GsmL1_TchPlType_Hr:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
break;
case GsmL1_TchPlType_Amr:
if (lchan->type != GSM_LCHAN_TCH_H &&
lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
break;
case GsmL1_TchPlType_Amr_Onset:
if (lchan->type != GSM_LCHAN_TCH_H &&
lchan->type != GSM_LCHAN_TCH_F)
goto err_payload_match;
/* according to 3GPP TS 26.093 ONSET frames precede the first
speech frame of a speech burst - set the marker for next RTP
frame */
lchan->tch.dtx.is_speech_resume = true;
lchan->rtp_tx_marker = true;
break;
case GsmL1_TchPlType_Amr_SidFirstP1:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
LOGPFN(DL1P, LOGL_DEBUG, data_ind->u32Fn, "DTX: received SID_FIRST_P1 from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidFirstP2:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
LOGPFN(DL1P, LOGL_DEBUG, data_ind->u32Fn, "DTX: received SID_FIRST_P2 from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidFirstInH:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
lchan->tch.dtx.is_speech_resume = true;
lchan->rtp_tx_marker = true;
LOGPFN(DL1P, LOGL_DEBUG, data_ind->u32Fn, "DTX: received SID_FIRST_INH from L1 "
"(%d bytes)\n", payload_len);
break;
case GsmL1_TchPlType_Amr_SidUpdateInH:
if (lchan->type != GSM_LCHAN_TCH_H)
goto err_payload_match;
lchan->tch.dtx.is_speech_resume = true;
lchan->rtp_tx_marker = true;
LOGPFN(DL1P, LOGL_DEBUG, data_ind->u32Fn, "DTX: received SID_UPDATE_INH from L1 "
"(%d bytes)\n", payload_len);
break;
default:
LOGPFN(DL1P, LOGL_NOTICE, data_ind->u32Fn, "%s Rx Payload Type %s is unsupported\n",
gsm_lchan_name(lchan),
get_value_string(oc2gbts_tch_pl_names, payload_type));
break;
}
LOGP(DL1P, LOGL_DEBUG, "%s %s lchan->rtp_tx_marker = %s, len=%u\n",
gsm_lchan_name(lchan),
get_value_string(oc2gbts_tch_pl_names, payload_type),
lchan->rtp_tx_marker ? "true" : "false",
payload_len);
switch (payload_type) {
case GsmL1_TchPlType_Fr:
rmsg = l1_to_rtppayload_fr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Hr:
rmsg = l1_to_rtppayload_hr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Efr:
rmsg = l1_to_rtppayload_efr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Amr:
rmsg = l1_to_rtppayload_amr(payload, payload_len, lchan);
break;
case GsmL1_TchPlType_Amr_SidFirstP1:
memcpy(sid_first, payload, payload_len);
int len = osmo_amr_rtp_enc(sid_first, 0, AMR_SID, AMR_GOOD);
if (len < 0)
return 0;
rmsg = l1_to_rtppayload_amr(sid_first, len, lchan);
break;
}
if (rmsg)
return add_l1sap_header(trx, rmsg, lchan, chan_nr, data_ind->u32Fn,
data_ind->measParam.fBer * 10000,
data_ind->measParam.fLinkQuality * 10);
return 0;
err_payload_match:
LOGPFN(DL1P, LOGL_ERROR, data_ind->u32Fn, "%s Rx Payload Type %s incompatible with lchan\n",
gsm_lchan_name(lchan), get_value_string(oc2gbts_tch_pl_names, payload_type));
return -EINVAL;
}