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osmo-msc/src/rsl.c

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/* 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) 2008-2009 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <osmocore/tlv.h>
#include <osmocore/rsl.h>
void rsl_init_rll_hdr(struct abis_rsl_rll_hdr *dh, uint8_t msg_type)
{
dh->c.msg_discr = ABIS_RSL_MDISC_RLL;
dh->c.msg_type = msg_type;
dh->ie_chan = RSL_IE_CHAN_NR;
dh->ie_link_id = RSL_IE_LINK_IDENT;
}
const struct tlv_definition rsl_att_tlvdef = {
.def = {
[RSL_IE_CHAN_NR] = { TLV_TYPE_TV },
[RSL_IE_LINK_IDENT] = { TLV_TYPE_TV },
[RSL_IE_ACT_TYPE] = { TLV_TYPE_TV },
[RSL_IE_BS_POWER] = { TLV_TYPE_TV },
[RSL_IE_CHAN_IDENT] = { TLV_TYPE_TLV },
[RSL_IE_CHAN_MODE] = { TLV_TYPE_TLV },
[RSL_IE_ENCR_INFO] = { TLV_TYPE_TLV },
[RSL_IE_FRAME_NUMBER] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_HANDO_REF] = { TLV_TYPE_TV },
[RSL_IE_L1_INFO] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_L3_INFO] = { TLV_TYPE_TL16V },
[RSL_IE_MS_IDENTITY] = { TLV_TYPE_TLV },
[RSL_IE_MS_POWER] = { TLV_TYPE_TV },
[RSL_IE_PAGING_GROUP] = { TLV_TYPE_TV },
[RSL_IE_PAGING_LOAD] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_PYHS_CONTEXT] = { TLV_TYPE_TLV },
[RSL_IE_ACCESS_DELAY] = { TLV_TYPE_TV },
[RSL_IE_RACH_LOAD] = { TLV_TYPE_TLV },
[RSL_IE_REQ_REFERENCE] = { TLV_TYPE_FIXED, 3 },
[RSL_IE_RELEASE_MODE] = { TLV_TYPE_TV },
[RSL_IE_RESOURCE_INFO] = { TLV_TYPE_TLV },
[RSL_IE_RLM_CAUSE] = { TLV_TYPE_TLV },
[RSL_IE_STARTNG_TIME] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_TIMING_ADVANCE] = { TLV_TYPE_TV },
[RSL_IE_UPLINK_MEAS] = { TLV_TYPE_TLV },
[RSL_IE_CAUSE] = { TLV_TYPE_TLV },
[RSL_IE_MEAS_RES_NR] = { TLV_TYPE_TV },
[RSL_IE_MSG_ID] = { TLV_TYPE_TV },
[RSL_IE_SYSINFO_TYPE] = { TLV_TYPE_TV },
[RSL_IE_MS_POWER_PARAM] = { TLV_TYPE_TLV },
[RSL_IE_BS_POWER_PARAM] = { TLV_TYPE_TLV },
[RSL_IE_PREPROC_PARAM] = { TLV_TYPE_TLV },
[RSL_IE_PREPROC_MEAS] = { TLV_TYPE_TLV },
[RSL_IE_IMM_ASS_INFO] = { TLV_TYPE_TLV },
[RSL_IE_SMSCB_INFO] = { TLV_TYPE_FIXED, 23 },
[RSL_IE_MS_TIMING_OFFSET] = { TLV_TYPE_TV },
[RSL_IE_ERR_MSG] = { TLV_TYPE_TLV },
[RSL_IE_FULL_BCCH_INFO] = { TLV_TYPE_TLV },
[RSL_IE_CHAN_NEEDED] = { TLV_TYPE_TV },
[RSL_IE_CB_CMD_TYPE] = { TLV_TYPE_TV },
[RSL_IE_SMSCB_MSG] = { TLV_TYPE_TLV },
[RSL_IE_FULL_IMM_ASS_INFO] = { TLV_TYPE_TLV },
[RSL_IE_SACCH_INFO] = { TLV_TYPE_TLV },
[RSL_IE_CBCH_LOAD_INFO] = { TLV_TYPE_TV },
[RSL_IE_SMSCB_CHAN_INDICATOR] = { TLV_TYPE_TV },
[RSL_IE_GROUP_CALL_REF] = { TLV_TYPE_TLV },
[RSL_IE_CHAN_DESC] = { TLV_TYPE_TLV },
[RSL_IE_NCH_DRX_INFO] = { TLV_TYPE_TLV },
[RSL_IE_CMD_INDICATOR] = { TLV_TYPE_TLV },
[RSL_IE_EMLPP_PRIO] = { TLV_TYPE_TV },
[RSL_IE_UIC] = { TLV_TYPE_TLV },
[RSL_IE_MAIN_CHAN_REF] = { TLV_TYPE_TV },
[RSL_IE_MR_CONFIG] = { TLV_TYPE_TLV },
[RSL_IE_MR_CONTROL] = { TLV_TYPE_TV },
[RSL_IE_SUP_CODEC_TYPES] = { TLV_TYPE_TLV },
[RSL_IE_CODEC_CONFIG] = { TLV_TYPE_TLV },
[RSL_IE_RTD] = { TLV_TYPE_TV },
[RSL_IE_TFO_STATUS] = { TLV_TYPE_TV },
[RSL_IE_LLP_APDU] = { TLV_TYPE_TLV },
[RSL_IE_SIEMENS_MRPCI] = { TLV_TYPE_TV },
[RSL_IE_IPAC_PROXY_UDP] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_IPAC_BSCMPL_TOUT] = { TLV_TYPE_TV },
[RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 },
[RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_IPAC_RTP_PAYLOAD] = { TLV_TYPE_TV },
[RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_IPAC_SPEECH_MODE] = { TLV_TYPE_TV },
[RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 },
[RSL_IE_IPAC_CONN_ID] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_IPAC_RTP_CSD_FMT] = { TLV_TYPE_TV },
[RSL_IE_IPAC_RTP_JIT_BUF] = { TLV_TYPE_FIXED, 2 },
[RSL_IE_IPAC_RTP_COMPR] = { TLV_TYPE_TV },
[RSL_IE_IPAC_RTP_PAYLOAD2] = { TLV_TYPE_TV },
[RSL_IE_IPAC_RTP_MPLEX] = { TLV_TYPE_FIXED, 8 },
[RSL_IE_IPAC_RTP_MPLEX_ID] = { TLV_TYPE_TV },
},
};
/* encode channel number as per Section 9.3.1 */
uint8_t rsl_enc_chan_nr(uint8_t type, uint8_t subch, uint8_t timeslot)
{
uint8_t ret;
ret = (timeslot & 0x07) | type;
switch (type) {
case RSL_CHAN_Lm_ACCHs:
subch &= 0x01;
break;
case RSL_CHAN_SDCCH4_ACCH:
subch &= 0x07;
break;
case RSL_CHAN_SDCCH8_ACCH:
subch &= 0x07;
break;
default:
/* no subchannels allowed */
subch = 0x00;
break;
}
ret |= (subch << 3);
return ret;
}
/* FIXME: convert to value_string */
static const char *rsl_err_vals[0xff] = {
[RSL_ERR_RADIO_IF_FAIL] = "Radio Interface Failure",
[RSL_ERR_RADIO_LINK_FAIL] = "Radio Link Failure",
[RSL_ERR_HANDOVER_ACC_FAIL] = "Handover Access Failure",
[RSL_ERR_TALKER_ACC_FAIL] = "Talker Access Failure",
[RSL_ERR_OM_INTERVENTION] = "O&M Intervention",
[RSL_ERR_NORMAL_UNSPEC] = "Normal event, unspecified",
[RSL_ERR_T_MSRFPCI_EXP] = "Siemens: T_MSRFPCI Expired",
[RSL_ERR_EQUIPMENT_FAIL] = "Equipment Failure",
[RSL_ERR_RR_UNAVAIL] = "Radio Resource not available",
[RSL_ERR_TERR_CH_FAIL] = "Terrestrial Channel Failure",
[RSL_ERR_CCCH_OVERLOAD] = "CCCH Overload",
[RSL_ERR_ACCH_OVERLOAD] = "ACCH Overload",
[RSL_ERR_PROCESSOR_OVERLOAD] = "Processor Overload",
[RSL_ERR_RES_UNAVAIL] = "Resource not available, unspecified",
[RSL_ERR_TRANSC_UNAVAIL] = "Transcoding not available",
[RSL_ERR_SERV_OPT_UNAVAIL] = "Service or Option not available",
[RSL_ERR_ENCR_UNIMPL] = "Encryption algorithm not implemented",
[RSL_ERR_SERV_OPT_UNIMPL] = "Service or Option not implemented",
[RSL_ERR_RCH_ALR_ACTV_ALLOC] = "Radio channel already activated",
[RSL_ERR_INVALID_MESSAGE] = "Invalid Message, unspecified",
[RSL_ERR_MSG_DISCR] = "Message Discriminator Error",
[RSL_ERR_MSG_TYPE] = "Message Type Error",
[RSL_ERR_MSG_SEQ] = "Message Sequence Error",
[RSL_ERR_IE_ERROR] = "General IE error",
[RSL_ERR_MAND_IE_ERROR] = "Mandatory IE error",
[RSL_ERR_OPT_IE_ERROR] = "Optional IE error",
[RSL_ERR_IE_NONEXIST] = "IE non-existent",
[RSL_ERR_IE_LENGTH] = "IE length error",
[RSL_ERR_IE_CONTENT] = "IE content error",
[RSL_ERR_PROTO] = "Protocol error, unspecified",
[RSL_ERR_INTERWORKING] = "Interworking error, unspecified",
};
const struct value_string rsl_rlm_cause_strs[] = {
{ RLL_CAUSE_T200_EXPIRED, "Timer T200 expired (N200+1) times" },
{ RLL_CAUSE_REEST_REQ, "Re-establishment request" },
{ RLL_CAUSE_UNSOL_UA_RESP, "Unsolicited UA response" },
{ RLL_CAUSE_UNSOL_DM_RESP, "Unsolicited DM response" },
{ RLL_CAUSE_UNSOL_DM_RESP_MF, "Unsolicited DM response, multiple frame" },
{ RLL_CAUSE_UNSOL_SPRV_RESP, "Unsolicited supervisory response" },
{ RLL_CAUSE_SEQ_ERR, "Sequence Error" },
{ RLL_CAUSE_UFRM_INC_PARAM, "U-Frame with incorrect parameters" },
{ RLL_CAUSE_SFRM_INC_PARAM, "S-Frame with incorrect parameters" },
{ RLL_CAUSE_IFRM_INC_MBITS, "I-Frame with incorrect use of M bit" },
{ RLL_CAUSE_IFRM_INC_LEN, "I-Frame with incorrect length" },
{ RLL_CAUSE_FRM_UNIMPL, "Fraeme not implemented" },
{ RLL_CAUSE_SABM_MF, "SABM command, multiple frame established state" },
{ RLL_CAUSE_SABM_INFO_NOTALL, "SABM frame with information not allowed in this state" },
{ 0, NULL },
};
const char *rsl_err_name(uint8_t err)
{
if (rsl_err_vals[err])
return rsl_err_vals[err];
else
return "unknown";
}
/* Section 3.3.2.3 TS 05.02. I think this looks like a table */
int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf)
{
switch (ccch_conf) {
case RSL_BCCH_CCCH_CONF_1_NC:
return 1;
case RSL_BCCH_CCCH_CONF_1_C:
return 1;
case RSL_BCCH_CCCH_CONF_2_NC:
return 2;
case RSL_BCCH_CCCH_CONF_3_NC:
return 3;
case RSL_BCCH_CCCH_CONF_4_NC:
return 4;
default:
return -1;
}
}
/* Section 3.3.2.3 TS 05.02 */
int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf)
{
switch (ccch_conf) {
case RSL_BCCH_CCCH_CONF_1_NC:
return 0;
case RSL_BCCH_CCCH_CONF_1_C:
return 1;
case RSL_BCCH_CCCH_CONF_2_NC:
return 0;
case RSL_BCCH_CCCH_CONF_3_NC:
return 0;
case RSL_BCCH_CCCH_CONF_4_NC:
return 0;
default:
return -1;
}
}
/* Push a RSL RLL header with L3_INFO IE */
int rsl_rll_push_l3(struct msgb *msg, uint8_t msg_type,
uint8_t chan_nr, uint8_t link_id)
{
uint8_t l3_len = msg->tail - (uint8_t *)msgb_l3(msg);
struct abis_rsl_rll_hdr *rh;
/* construct a RSLms RLL message (DATA INDICATION, UNIT DATA
* INDICATION) and send it off via RSLms */
/* Push the L3 IE tag and lengh */
msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len);
/* Then push the RSL header */
rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh));
rsl_init_rll_hdr(rh, msg_type);
rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP;
rh->chan_nr = chan_nr;
rh->link_id = link_id;
/* set the l2 header pointer */
msg->l2h = (uint8_t *)rh;
return 0;
}
struct msgb *rsl_rll_simple(uint8_t msg_type, uint8_t chan_nr,
uint8_t link_id)
{
struct abis_rsl_rll_hdr *rh;
struct msgb *msg = msgb_alloc(sizeof(*rh), "rsl_rll_simple");
if (!msg)
return NULL;
/* put the RSL header */
rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh));
rsl_init_rll_hdr(rh, msg_type);
rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP;
rh->chan_nr = chan_nr;
rh->link_id = link_id;
/* set the l2 header pointer */
msg->l2h = (uint8_t *)rh;
return msg;
}
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