/*! \brief Transmit a BVC-RESET message (Chapter 10.4.12) */
int bssgp_tx_bvc_reset(struct bssgp_bvc_ctx *bctx, uint16_t bvci, uint8_t cause)
{
struct msgb *msg = bssgp_msgb_alloc();
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
uint16_t _bvci = htons(bvci);
LOGP(DBSSGP, LOGL_NOTICE, "BSSGP (BVCI=%u) Tx BVC-RESET "
"CAUSE=%u\n", bvci, cause);
msgb_nsei(msg) = bctx->nsei;
msgb_bvci(msg) = 0; /* Signalling */
bgph->pdu_type = BSSGP_PDUT_BVC_RESET;
msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
if (bvci != BVCI_PTM) {
uint8_t bssgp_cid[8];
bssgp_create_cell_id(bssgp_cid, &bctx->ra_id, bctx->cell_id);
msgb_tvlv_put(msg, BSSGP_IE_CELL_ID, sizeof(bssgp_cid), bssgp_cid);
}
/* Optional: Feature Bitmap */
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 = 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);
}
/* generate a PDP context based on the IE's from the 04.08 message,
* and send the GTP create pdp context request to the GGSN */
struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn,
struct sgsn_mm_ctx *mmctx,
uint16_t nsapi,
struct tlv_parsed *tp)
{
struct gprs_ra_id raid;
struct sgsn_pdp_ctx *pctx;
struct pdp_t *pdp;
uint64_t imsi_ui64;
size_t qos_len;
const uint8_t *qos;
int rc;
LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n");
pctx = sgsn_pdp_ctx_alloc(mmctx, nsapi);
if (!pctx) {
LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n");
return NULL;
}
imsi_ui64 = imsi_str2gtp(mmctx->imsi);
rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL);
if (rc) {
LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n");
return NULL;
}
pdp->priv = pctx;
pctx->lib = pdp;
pctx->ggsn = ggsn;
//pdp->peer = /* sockaddr_in of GGSN (receive) */
//pdp->ipif = /* not used by library */
pdp->version = ggsn->gtp_version;
pdp->hisaddr0 = ggsn->remote_addr;
pdp->hisaddr1 = ggsn->remote_addr;
//pdp->cch_pdp = 512; /* Charging Flat Rate */
/* MS provided APN, subscription was verified by the caller */
pdp->selmode = 0xFC | 0x00;
/* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */
/* Put the MSISDN in case we have it */
if (mmctx->subscr) {
pdp->msisdn.l = mmctx->subscr->sgsn_data->msisdn_len;
if (pdp->msisdn.l > sizeof(pdp->msisdn.v))
pdp->msisdn.l = sizeof(pdp->msisdn.v);
memcpy(pdp->msisdn.v, mmctx->subscr->sgsn_data->msisdn,
pdp->msisdn.l);
}
/* End User Address from GMM requested PDP address */
pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR);
if (pdp->eua.l > sizeof(pdp->eua.v))
pdp->eua.l = sizeof(pdp->eua.v);
memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR),
pdp->eua.l);
/* Highest 4 bits of first byte need to be set to 1, otherwise
* the IE is identical with the 04.08 PDP Address IE */
pdp->eua.v[0] |= 0xf0;
/* APN name from GMM */
pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN);
if (pdp->apn_use.l > sizeof(pdp->apn_use.v))
pdp->apn_use.l = sizeof(pdp->apn_use.v);
memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN),
pdp->apn_use.l);
/* Protocol Configuration Options from GMM */
pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT);
if (pdp->pco_req.l > sizeof(pdp->pco_req.v))
pdp->pco_req.l = sizeof(pdp->pco_req.v);
memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT),
pdp->pco_req.l);
/* QoS options from GMM or remote */
if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) {
qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS);
qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS);
} else {
qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS);
qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS);
}
if (qos_len <= 3) {
pdp->qos_req.l = qos_len + 1;
if (pdp->qos_req.l > sizeof(pdp->qos_req.v))
pdp->qos_req.l = sizeof(pdp->qos_req.v);
pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */
memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1);
} else {
pdp->qos_req.l = qos_len;
if (pdp->qos_req.l > sizeof(pdp->qos_req.v))
pdp->qos_req.l = sizeof(pdp->qos_req.v);
memcpy(pdp->qos_req.v, qos, pdp->qos_req.l);
}
/* SGSN address for control plane */
pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr);
memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr,
sizeof(sgsn->cfg.gtp_listenaddr.sin_addr));
/* SGSN address for user plane */
pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr);
memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr,
sizeof(sgsn->cfg.gtp_listenaddr.sin_addr));
/* Assume we are a GERAN system */
pdp->rattype.l = 1;
pdp->rattype.v[0] = 2;
pdp->rattype_given = 1;
/* Include RAI and ULI all the time */
pdp->rai_given = 1;
pdp->rai.l = 6;
raid = mmctx->ra;
raid.lac = 0xFFFE;
raid.rac = 0xFF;
gsm48_construct_ra(pdp->rai.v, &raid);
pdp->userloc_given = 1;
pdp->userloc.l = 8;
pdp->userloc.v[0] = 0; /* CGI for GERAN */
bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->cell_id);
/* include the IMEI(SV) */
pdp->imeisv_given = 1;
gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei);
pdp->imeisv.l = pdp->imeisv.v[0];
memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8);
/* change pdp state to 'requested' */
pctx->state = PDP_STATE_CR_REQ;
rc = gtp_create_context_req(ggsn->gsn, pdp, pctx);
/* FIXME */
return pctx;
}
