mirror of https://gerrit.osmocom.org/libosmocore
558 lines
17 KiB
C
558 lines
17 KiB
C
/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */
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/* (C) 2009-2017 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/byteswap.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/gsm/tlv.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/gprs/gprs_bssgp.h>
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#include <osmocom/gprs/gprs_bssgp_bss.h>
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#include <osmocom/gprs/gprs_ns.h>
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#include "common_vty.h"
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#define GSM_IMSI_LENGTH 17
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uint8_t *bssgp_msgb_tlli_put(struct msgb *msg, uint32_t tlli)
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{
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uint32_t _tlli = osmo_htonl(tlli);
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return msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli);
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}
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/*! \brief GMM-SUSPEND.req (Chapter 10.3.6) */
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int bssgp_tx_suspend(uint16_t nsei, uint32_t tlli,
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const struct gprs_ra_id *ra_id)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint8_t ra[6];
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=0) Tx SUSPEND (TLLI=0x%04x)\n",
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tlli);
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msgb_nsei(msg) = nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_SUSPEND;
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bssgp_msgb_tlli_put(msg, tlli);
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gsm48_construct_ra(ra, ra_id);
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msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief GMM-RESUME.req (Chapter 10.3.9) */
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int bssgp_tx_resume(uint16_t nsei, uint32_t tlli,
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const struct gprs_ra_id *ra_id, uint8_t suspend_ref)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint8_t ra[6];
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=0) Tx RESUME (TLLI=0x%04x)\n",
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tlli);
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msgb_nsei(msg) = nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_RESUME;
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bssgp_msgb_tlli_put(msg, tlli);
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gsm48_construct_ra(ra, ra_id);
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msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra);
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msgb_tvlv_put(msg, BSSGP_IE_SUSPEND_REF_NR, 1, &suspend_ref);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit RA-CAPABILITY-UPDATE (10.3.3) */
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int bssgp_tx_ra_capa_upd(struct bssgp_bvc_ctx *bctx, uint32_t tlli, uint8_t tag)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx RA-CAPA-UPD (TLLI=0x%04x)\n",
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bctx->bvci, tlli);
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/* set NSEI and BVCI in msgb cb */
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = bctx->bvci;
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bgph->pdu_type = BSSGP_PDUT_RA_CAPA_UDPATE;
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bssgp_msgb_tlli_put(msg, tlli);
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msgb_tvlv_put(msg, BSSGP_IE_TAG, 1, &tag);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/* first common part of RADIO-STATUS */
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static struct msgb *common_tx_radio_status(struct bssgp_bvc_ctx *bctx)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx RADIO-STATUS ",
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bctx->bvci);
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/* set NSEI and BVCI in msgb cb */
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = bctx->bvci;
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bgph->pdu_type = BSSGP_PDUT_RADIO_STATUS;
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return msg;
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}
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/* second common part of RADIO-STATUS */
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static int common_tx_radio_status2(struct msgb *msg, uint8_t cause)
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{
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msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
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LOGPC(DBSSGP, LOGL_NOTICE, "CAUSE=%s\n", bssgp_cause_str(cause));
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit RADIO-STATUS for TLLI (10.3.5) */
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int bssgp_tx_radio_status_tlli(struct bssgp_bvc_ctx *bctx, uint8_t cause,
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uint32_t tlli)
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{
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struct msgb *msg = common_tx_radio_status(bctx);
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if (!msg)
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return -ENOMEM;
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bssgp_msgb_tlli_put(msg, tlli);
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LOGPC(DBSSGP, LOGL_NOTICE, "TLLI=0x%08x ", tlli);
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return common_tx_radio_status2(msg, cause);
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}
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/*! \brief Transmit RADIO-STATUS for TMSI (10.3.5) */
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int bssgp_tx_radio_status_tmsi(struct bssgp_bvc_ctx *bctx, uint8_t cause,
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uint32_t tmsi)
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{
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struct msgb *msg = common_tx_radio_status(bctx);
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uint32_t _tmsi = osmo_htonl(tmsi);
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if (!msg)
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return -ENOMEM;
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msgb_tvlv_put(msg, BSSGP_IE_TMSI, 4, (uint8_t *)&_tmsi);
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LOGPC(DBSSGP, LOGL_NOTICE, "TMSI=0x%08x ", tmsi);
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return common_tx_radio_status2(msg, cause);
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}
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/*! \brief Transmit RADIO-STATUS for IMSI (10.3.5) */
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int bssgp_tx_radio_status_imsi(struct bssgp_bvc_ctx *bctx, uint8_t cause,
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const char *imsi)
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{
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struct msgb *msg = common_tx_radio_status(bctx);
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uint8_t mi[10];
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int imsi_len = gsm48_generate_mid_from_imsi(mi, imsi);
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if (!msg)
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return -ENOMEM;
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/* strip the MI type and length values (2 bytes) */
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if (imsi_len > 2)
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msgb_tvlv_put(msg, BSSGP_IE_IMSI, imsi_len-2, mi+2);
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LOGPC(DBSSGP, LOGL_NOTICE, "IMSI=%s ", imsi);
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return common_tx_radio_status2(msg, cause);
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}
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/*! \brief Transmit FLUSH-LL-ACK (Chapter 10.4.2) */
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int bssgp_tx_flush_ll_ack(struct bssgp_bvc_ctx *bctx, uint32_t tlli,
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uint8_t action, uint16_t bvci_new,
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uint32_t num_octets)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci_new = osmo_htons(bvci_new);
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uint32_t _oct_aff = osmo_htonl(num_octets & 0xFFFFFF);
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_FLUSH_LL_ACK;
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bssgp_msgb_tlli_put(msg, tlli);
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msgb_tvlv_put(msg, BSSGP_IE_FLUSH_ACTION, 1, &action);
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if (action == 1) /* transferred */
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci_new);
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msgb_tvlv_put(msg, BSSGP_IE_NUM_OCT_AFF, 3, (uint8_t *) &_oct_aff);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit LLC-DISCARDED (Chapter 10.4.3) */
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int bssgp_tx_llc_discarded(struct bssgp_bvc_ctx *bctx, uint32_t tlli,
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uint8_t num_frames, uint32_t num_octets)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci = osmo_htons(bctx->bvci);
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uint32_t _oct_aff = osmo_htonl(num_octets & 0xFFFFFF);
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx LLC-DISCARDED "
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"TLLI=0x%04x, FRAMES=%u, OCTETS=%u\n", bctx->bvci, tlli,
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num_frames, num_octets);
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_LLC_DISCARD;
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bssgp_msgb_tlli_put(msg, tlli);
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msgb_tvlv_put(msg, BSSGP_IE_LLC_FRAMES_DISCARDED, 1, &num_frames);
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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msgb_tvlv_put(msg, BSSGP_IE_NUM_OCT_AFF, 3, ((uint8_t *) &_oct_aff) + 1);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit a BVC-BLOCK message (Chapter 10.4.8) */
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int bssgp_tx_bvc_block(struct bssgp_bvc_ctx *bctx, uint8_t cause)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci = osmo_htons(bctx->bvci);
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx BVC-BLOCK "
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"CAUSE=%s\n", bctx->bvci, bssgp_cause_str(cause));
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_BVC_BLOCK;
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit a BVC-UNBLOCK message (Chapter 10.4.10) */
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int bssgp_tx_bvc_unblock(struct bssgp_bvc_ctx *bctx)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci = osmo_htons(bctx->bvci);
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx BVC-BLOCK\n", bctx->bvci);
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_BVC_UNBLOCK;
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit a BVC-RESET message (Chapter 10.4.12) */
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int bssgp_tx_bvc_reset(struct bssgp_bvc_ctx *bctx, uint16_t bvci, uint8_t cause)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci = osmo_htons(bvci);
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx BVC-RESET "
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"CAUSE=%s\n", bvci, bssgp_cause_str(cause));
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = 0; /* Signalling */
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bgph->pdu_type = BSSGP_PDUT_BVC_RESET;
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
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if (bvci != BVCI_PTM) {
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uint8_t bssgp_cid[8];
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bssgp_create_cell_id(bssgp_cid, &bctx->ra_id, bctx->cell_id);
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msgb_tvlv_put(msg, BSSGP_IE_CELL_ID, sizeof(bssgp_cid), bssgp_cid);
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}
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/* Optional: Feature Bitmap */
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit a FLOW_CONTROL-BVC (Chapter 10.4.4)
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* \param[in] bctx BVC Context
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* \param[in] tag Additional tag to identify acknowledge
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* \param[in] bucket_size Maximum bucket size in octets
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* \param[in] bucket_leak_rate Bucket leak rate in octets/sec
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* \param[in] bmax_default_ms Maximum bucket size default for MS
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* \param[in] r_default_ms Bucket leak rate default for MS in octets/sec
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* \param[in] bucket_full_ratio Ratio (in percent) of queue filling
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* \param[in] queue_delay_ms Average queuing delay in milliseconds
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*/
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int bssgp_tx_fc_bvc(struct bssgp_bvc_ctx *bctx, uint8_t tag,
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uint32_t bucket_size, uint32_t bucket_leak_rate,
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uint32_t bmax_default_ms, uint32_t r_default_ms,
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uint8_t *bucket_full_ratio, uint32_t *queue_delay_ms)
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{
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struct msgb *msg;
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struct bssgp_normal_hdr *bgph;
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uint16_t e_bucket_size, e_leak_rate, e_bmax_default_ms, e_r_default_ms;
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uint16_t e_queue_delay = 0; /* to make gcc happy */
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if ((bucket_size / 100) > 0xffff)
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return -EINVAL;
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e_bucket_size = osmo_htons(bucket_size / 100);
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if ((bucket_leak_rate * 8 / 100) > 0xffff)
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return -EINVAL;
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e_leak_rate = osmo_htons((bucket_leak_rate * 8) / 100);
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if ((bmax_default_ms / 100) > 0xffff)
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return -EINVAL;
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e_bmax_default_ms = osmo_htons(bmax_default_ms / 100);
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if ((r_default_ms * 8 / 100) > 0xffff)
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return -EINVAL;
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e_r_default_ms = osmo_htons((r_default_ms * 8) / 100);
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if (queue_delay_ms) {
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if ((*queue_delay_ms / 10) > 60000)
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return -EINVAL;
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else if (*queue_delay_ms == 0xFFFFFFFF)
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e_queue_delay = 0xFFFF;
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else
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e_queue_delay = osmo_htons(*queue_delay_ms / 10);
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}
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msg = bssgp_msgb_alloc();
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bgph = (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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msgb_nsei(msg) = bctx->nsei;
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msgb_bvci(msg) = bctx->bvci;
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bgph->pdu_type = BSSGP_PDUT_FLOW_CONTROL_BVC;
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msgb_tvlv_put(msg, BSSGP_IE_TAG, sizeof(tag), (uint8_t *)&tag);
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msgb_tvlv_put(msg, BSSGP_IE_BVC_BUCKET_SIZE,
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sizeof(e_bucket_size), (uint8_t *) &e_bucket_size);
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msgb_tvlv_put(msg, BSSGP_IE_BUCKET_LEAK_RATE,
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sizeof(e_leak_rate), (uint8_t *) &e_leak_rate);
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msgb_tvlv_put(msg, BSSGP_IE_BMAX_DEFAULT_MS,
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sizeof(e_bmax_default_ms),
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(uint8_t *) &e_bmax_default_ms);
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msgb_tvlv_put(msg, BSSGP_IE_R_DEFAULT_MS,
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sizeof(e_r_default_ms), (uint8_t *) &e_r_default_ms);
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if (bucket_full_ratio)
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msgb_tvlv_put(msg, BSSGP_IE_BUCKET_FULL_RATIO,
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1, bucket_full_ratio);
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if (queue_delay_ms)
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msgb_tvlv_put(msg, BSSGP_IE_BVC_MEASUREMENT,
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sizeof(e_queue_delay),
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(uint8_t *) &e_queue_delay);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/*! \brief Transmit a FLOW_CONTROL-MS (Chapter 10.4.6)
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* \param[in] bctx BVC Context
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* \param[in] tlli TLLI to identify MS
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* \param[in] tag Additional tag to identify acknowledge
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* \param[in] ms_bucket_size Maximum bucket size in octets
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* \param[in] bucket_leak_rate Bucket leak rate in octets/sec
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* \param[in] bucket_full_ratio Ratio (in percent) of queue filling
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*/
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int bssgp_tx_fc_ms(struct bssgp_bvc_ctx *bctx, uint32_t tlli, uint8_t tag,
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uint32_t ms_bucket_size, uint32_t bucket_leak_rate,
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uint8_t *bucket_full_ratio)
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{
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struct msgb *msg;
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struct bssgp_normal_hdr *bgph;
|
|
uint16_t e_bucket_size, e_leak_rate;
|
|
uint32_t e_tlli;
|
|
|
|
if ((ms_bucket_size / 100) > 0xffff)
|
|
return -EINVAL;
|
|
e_bucket_size = ms_bucket_size / 100;
|
|
|
|
if ((bucket_leak_rate * 8 / 100) > 0xffff)
|
|
return -EINVAL;
|
|
e_leak_rate = (bucket_leak_rate * 8) / 100;
|
|
|
|
msg = bssgp_msgb_alloc();
|
|
bgph = (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
|
|
msgb_nsei(msg) = bctx->nsei;
|
|
msgb_bvci(msg) = bctx->bvci;
|
|
bgph->pdu_type = BSSGP_PDUT_FLOW_CONTROL_MS;
|
|
|
|
e_tlli = osmo_htonl(tlli);
|
|
msgb_tvlv_put(msg, BSSGP_IE_TLLI, sizeof(e_tlli), (uint8_t *)&e_tlli);
|
|
msgb_tvlv_put(msg, BSSGP_IE_TAG, sizeof(tag), (uint8_t *)&tag);
|
|
msgb_tvlv_put(msg, BSSGP_IE_MS_BUCKET_SIZE,
|
|
sizeof(e_bucket_size), (uint8_t *) &e_bucket_size);
|
|
msgb_tvlv_put(msg, BSSGP_IE_BUCKET_LEAK_RATE,
|
|
sizeof(e_leak_rate), (uint8_t *) &e_leak_rate);
|
|
if (bucket_full_ratio)
|
|
msgb_tvlv_put(msg, BSSGP_IE_BUCKET_FULL_RATIO,
|
|
1, bucket_full_ratio);
|
|
|
|
return gprs_ns_sendmsg(bssgp_nsi, msg);
|
|
}
|
|
|
|
/*! \brief RL-UL-UNITDATA.req (Chapter 10.2.2)
|
|
* \param[in] bctx BVC Context
|
|
* \param[in] tlli TLLI to identify MS
|
|
* \param[in] qos_profile Pointer to three octests of QoS profile
|
|
* \param[in] llc_pdu msgb pointer containing UL Unitdata IE payload
|
|
*/
|
|
int bssgp_tx_ul_ud(struct bssgp_bvc_ctx *bctx, uint32_t tlli,
|
|
const uint8_t *qos_profile, struct msgb *llc_pdu)
|
|
{
|
|
struct msgb *msg = llc_pdu;
|
|
uint8_t bssgp_cid[8];
|
|
uint8_t bssgp_align[3] = {0, 0, 0};
|
|
struct bssgp_ud_hdr *budh;
|
|
int align = sizeof(*budh);
|
|
|
|
/* FIXME: Optional LSA Identifier List, PFI */
|
|
|
|
/* Cell Identifier */
|
|
bssgp_create_cell_id(bssgp_cid, &bctx->ra_id, bctx->cell_id);
|
|
align += 2; /* add T+L */
|
|
align += sizeof(bssgp_cid);
|
|
|
|
/* First push alignment IE */
|
|
align += 2; /* add T+L */
|
|
align = (4 - align) & 3; /* how many octest are required to align? */
|
|
msgb_tvlv_push(msg, BSSGP_IE_ALIGNMENT, align, bssgp_align);
|
|
|
|
/* Push other IEs */
|
|
msgb_tvlv_push(msg, BSSGP_IE_CELL_ID, sizeof(bssgp_cid), bssgp_cid);
|
|
|
|
/* User Data Header */
|
|
budh = (struct bssgp_ud_hdr *) msgb_push(msg, sizeof(*budh));
|
|
budh->tlli = osmo_htonl(tlli);
|
|
memcpy(budh->qos_profile, qos_profile, 3);
|
|
budh->pdu_type = BSSGP_PDUT_UL_UNITDATA;
|
|
|
|
/* set NSEI and BVCI in msgb cb */
|
|
msgb_nsei(msg) = bctx->nsei;
|
|
msgb_bvci(msg) = bctx->bvci;
|
|
|
|
rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_OUT]);
|
|
rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_OUT], msg->len);
|
|
|
|
return gprs_ns_sendmsg(bssgp_nsi, msg);
|
|
}
|
|
|
|
/* Parse a single GMM-PAGING.req to a given NSEI/NS-BVCI */
|
|
int bssgp_rx_paging(struct bssgp_paging_info *pinfo,
|
|
struct msgb *msg)
|
|
{
|
|
struct bssgp_normal_hdr *bgph =
|
|
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
|
struct tlv_parsed tp;
|
|
uint8_t ra[6];
|
|
int rc, data_len;
|
|
|
|
memset(ra, 0, sizeof(ra));
|
|
|
|
data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
|
|
rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
|
|
if (rc < 0)
|
|
goto err_mand_ie;
|
|
|
|
switch (bgph->pdu_type) {
|
|
case BSSGP_PDUT_PAGING_PS:
|
|
pinfo->mode = BSSGP_PAGING_PS;
|
|
break;
|
|
case BSSGP_PDUT_PAGING_CS:
|
|
pinfo->mode = BSSGP_PAGING_CS;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* IMSI */
|
|
if (!TLVP_PRESENT(&tp, BSSGP_IE_IMSI))
|
|
goto err_mand_ie;
|
|
if (!pinfo->imsi)
|
|
pinfo->imsi = talloc_zero_size(pinfo, GSM_IMSI_LENGTH);
|
|
gsm48_mi_to_string(pinfo->imsi, GSM_IMSI_LENGTH,
|
|
TLVP_VAL(&tp, BSSGP_IE_IMSI),
|
|
TLVP_LEN(&tp, BSSGP_IE_IMSI));
|
|
|
|
/* DRX Parameters */
|
|
if (!TLVP_PRESENT(&tp, BSSGP_IE_DRX_PARAMS))
|
|
goto err_mand_ie;
|
|
pinfo->drx_params = tlvp_val16be(&tp, BSSGP_IE_DRX_PARAMS);
|
|
|
|
/* Scope */
|
|
if (TLVP_PRESENT(&tp, BSSGP_IE_BSS_AREA_ID)) {
|
|
pinfo->scope = BSSGP_PAGING_BSS_AREA;
|
|
} else if (TLVP_PRESENT(&tp, BSSGP_IE_LOCATION_AREA)) {
|
|
pinfo->scope = BSSGP_PAGING_LOCATION_AREA;
|
|
memcpy(ra, TLVP_VAL(&tp, BSSGP_IE_LOCATION_AREA),
|
|
TLVP_LEN(&tp, BSSGP_IE_LOCATION_AREA));
|
|
gsm48_parse_ra(&pinfo->raid, ra);
|
|
} else if (TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) {
|
|
pinfo->scope = BSSGP_PAGING_ROUTEING_AREA;
|
|
memcpy(ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA),
|
|
TLVP_LEN(&tp, BSSGP_IE_ROUTEING_AREA));
|
|
gsm48_parse_ra(&pinfo->raid, ra);
|
|
} else if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) {
|
|
pinfo->scope = BSSGP_PAGING_BVCI;
|
|
pinfo->bvci = tlvp_val16be(&tp, BSSGP_IE_BVCI);
|
|
} else
|
|
return -EINVAL;
|
|
|
|
/* QoS profile mandatory for PS */
|
|
if (pinfo->mode == BSSGP_PAGING_PS) {
|
|
if (!TLVP_PRESENT(&tp, BSSGP_IE_QOS_PROFILE))
|
|
goto err_cond_ie;
|
|
if (TLVP_LEN(&tp, BSSGP_IE_QOS_PROFILE) < 3)
|
|
goto err;
|
|
|
|
memcpy(&pinfo->qos, TLVP_VAL(&tp, BSSGP_IE_QOS_PROFILE),
|
|
3);
|
|
}
|
|
|
|
/* Optional (P-)TMSI */
|
|
if (TLVP_PRESENT(&tp, BSSGP_IE_TMSI) &&
|
|
TLVP_LEN(&tp, BSSGP_IE_TMSI) >= 4) {
|
|
if (!pinfo->ptmsi)
|
|
pinfo->ptmsi = talloc_zero_size(pinfo, sizeof(uint32_t));
|
|
*(pinfo->ptmsi) = osmo_load32be(TLVP_VAL(&tp, BSSGP_IE_TMSI));
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_mand_ie:
|
|
err_cond_ie:
|
|
err:
|
|
/* FIXME */
|
|
return 0;
|
|
}
|