233 lines
7.1 KiB
C++
233 lines
7.1 KiB
C++
/* gprs_bssgp_pcu.cpp
|
|
*
|
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <gprs_rlcmac.h>
|
|
#include <gprs_bssgp_pcu.h>
|
|
#include <pcu_l1_if.h>
|
|
|
|
struct sgsn_instance *sgsn;
|
|
void *tall_bsc_ctx;
|
|
struct bssgp_bvc_ctx *bctx = btsctx_alloc(BVCI, NSEI);
|
|
|
|
int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg)
|
|
{
|
|
struct bssgp_ud_hdr *budh;
|
|
int tfi;
|
|
int data_index = 0;
|
|
int i = 0;
|
|
int pdu_index = 0;
|
|
|
|
budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg);
|
|
struct gprs_rlcmac_tbf *tbf;
|
|
// Create new TBF
|
|
tfi = tfi_alloc();
|
|
if (tfi < 0) {
|
|
return tfi;
|
|
}
|
|
tbf = tbf_alloc(tfi);
|
|
tbf->direction = GPRS_RLCMAC_DL_TBF;
|
|
tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START;
|
|
tbf->tlli = ntohl(budh->tlli);
|
|
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP TLLI=0x%08x \n", ntohl(budh->tlli));
|
|
for (i = 4; i < MAX_LEN_PDU; i++)
|
|
{
|
|
//LOGP(DBSSGP, LOGL_NOTICE, "SERCH data = -0x%02x\n", budh ->data[i]);
|
|
if(budh->data[i] == IE_PDU)
|
|
{
|
|
pdu_index = i + 2;
|
|
break;
|
|
}
|
|
}
|
|
for (i = pdu_index; i < pdu_index + (budh->data[pdu_index-1]&0x7f); i++)
|
|
{
|
|
//LOGP(DBSSGP, LOGL_NOTICE, "-0x%02x\n", budh ->data[i]);
|
|
tbf->rlc_data[data_index] = budh->data[i];
|
|
data_index++;
|
|
}
|
|
DEBUGP(DBSSGP, "BSSGP Catch from SGSN=%u octets. Send it to OpenBTS.\n", data_index);
|
|
gsmtap_send_llc(tbf->rlc_data,data_index);
|
|
tbf->data_index = data_index;
|
|
|
|
gprs_rlcmac_downlink_assignment(tbf);
|
|
}
|
|
|
|
/* Receive a BSSGP PDU from a BSS on a PTP BVCI */
|
|
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);
|
|
uint8_t pdu_type = bgph->pdu_type;
|
|
unsigned rc = 0;
|
|
|
|
/* 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_DL_UNITDATA:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_DL_UNITDATA\n");
|
|
gprs_bssgp_pcu_rx_dl_ud(msg);
|
|
break;
|
|
case BSSGP_PDUT_PAGING_PS:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
|
break;
|
|
case BSSGP_PDUT_PAGING_CS:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n");
|
|
break;
|
|
case BSSGP_PDUT_RA_CAPA_UPDATE_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RA_CAPA_UPDATE_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_BVC_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_FLOW_CONTROL_MS_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_MS_ACK\n");
|
|
break;
|
|
default:
|
|
DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x unknown\n", bctx->bvci, 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 */
|
|
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);
|
|
int rc = 0;
|
|
switch (bgph->pdu_type) {
|
|
case BSSGP_PDUT_STATUS:
|
|
/* Some exception has occurred */
|
|
DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci);
|
|
/* FIXME: send NM_STATUS.ind to NM */
|
|
break;
|
|
case BSSGP_PDUT_SUSPEND_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_SUSPEND_NACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_NACK\n");
|
|
break;
|
|
case BSSGP_PDUT_BVC_RESET_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_RESET_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_PAGING_PS:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
|
break;
|
|
case BSSGP_PDUT_PAGING_CS:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n");
|
|
break;
|
|
case BSSGP_PDUT_RESUME_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_RESUME_NACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_NACK\n");
|
|
break;
|
|
case BSSGP_PDUT_FLUSH_LL:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLUSH_LL\n");
|
|
break;
|
|
case BSSGP_PDUT_BVC_BLOCK_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_BVC_UNBLOCK_ACK:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_UNBLOCK_ACK\n");
|
|
break;
|
|
case BSSGP_PDUT_SGSN_INVOKE_TRACE:
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SGSN_INVOKE_TRACE\n");
|
|
break;
|
|
default:
|
|
DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n", bctx->bvci, bgph->pdu_type);
|
|
rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
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;
|
|
uint8_t pdu_type = bgph->pdu_type;
|
|
uint16_t ns_bvci = msgb_bvci(msg);
|
|
int data_len;
|
|
int rc = 0;
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* look-up or create the BTS context for this BVC */
|
|
bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg));
|
|
|
|
/* Only a RESET PDU can create a new BVC context */
|
|
if (!bctx)
|
|
{
|
|
bctx = btsctx_alloc(ns_bvci, msgb_nsei(msg));
|
|
}
|
|
|
|
if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET_ACK)
|
|
{
|
|
LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU "
|
|
"type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci,
|
|
pdu_type);
|
|
return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
|
|
}
|
|
|
|
if (bctx)
|
|
{
|
|
log_set_context(BSC_CTX_BVC, bctx);
|
|
rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]);
|
|
rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], msgb_bssgp_len(msg));
|
|
}
|
|
|
|
if (ns_bvci == BVCI_SIGNALLING)
|
|
{
|
|
LOGP(DBSSGP, LOGL_NOTICE, "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_NOTICE, "rx BVCI_PTM bssgp_tx_status\n");
|
|
rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
|
|
}
|
|
else
|
|
{
|
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTP gprs_bssgp_rx_ptp\n");
|
|
rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx);
|
|
}
|
|
return rc;
|
|
}
|