Fixed parsing of BSSGP DL-UNITDATA in gprs_bssgp_pcu_rx_dl_ud() function.
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@ -25,14 +25,11 @@ struct sgsn_instance *sgsn;
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void *tall_bsc_ctx;
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struct bssgp_bvc_ctx *bctx = btsctx_alloc(BVCI, NSEI);
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int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg)
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int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp)
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{
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struct bssgp_ud_hdr *budh;
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int tfi;
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int data_index = 0;
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int i = 0;
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int pdu_index = 0;
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int llc_pdu_len = 0;
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budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg);
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struct gprs_rlcmac_tbf *tbf;
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@ -47,41 +44,39 @@ int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg)
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tbf->tlli = ntohl(budh->tlli);
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LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] START TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
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// TODO: Implement full parsing of BSSGP DL-UNITDATA (TS 48.018 10.2.1)
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for (i = 4; i < MAX_LEN_PDU; i++)
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/* LLC_PDU is mandatory IE */
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if (!TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU))
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{
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// Try to find IE LLC-PDU
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if(budh->data[i] == IE_LLC_PDU)
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{
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// Length of LLC-PDU (TS 48.016 10.1.2)
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LOGP(DBSSGP, LOGL_ERROR, "BSSGP TLLI=0x%08x Rx UL-UD missing mandatory IE\n", tbf->tlli);
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return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
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}
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// one octet length indicator
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if (budh->data[i+1] & 0x80)
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{
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llc_pdu_len = budh->data[i+1]&0x7f;
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pdu_index = i + 2;
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}
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// two octets length indicator
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else
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{
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llc_pdu_len = (budh->data[i+1] << 8)|budh->data[i+2];
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pdu_index = i + 3;
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}
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break;
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}
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}
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//LOGP(DBSSGP, LOGL_NOTICE, "LLC PDU LEN = %d \n", llc_pdu_len);
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//LOGP(DBSSGP, LOGL_NOTICE, "data = ");
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for (i = pdu_index; i < pdu_index + llc_pdu_len; i++)
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{
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//LOGPC(DBSSGP, LOGL_NOTICE, "%02x", budh ->data[i]);
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tbf->rlc_data[data_index] = budh->data[i];
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data_index++;
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}
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//LOGPC(DBSSGP, LOGL_NOTICE, "\n");
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gsmtap_send_llc(tbf->rlc_data,data_index);
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tbf->data_index = data_index;
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uint8_t *llc_pdu = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU);
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tbf->data_index = TLVP_LEN(tp, BSSGP_IE_LLC_PDU);
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LOGP(DBSSGP, LOGL_NOTICE, "LLC PDU = ");
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for (i = 0; i < tbf->data_index; i++)
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{
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tbf->rlc_data[i] = llc_pdu[i];
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LOGPC(DBSSGP, LOGL_NOTICE, "%02x", tbf->rlc_data[i]);
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}
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uint16_t imsi_len = 0;
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uint8_t *imsi;
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if (TLVP_PRESENT(tp, BSSGP_IE_IMSI))
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{
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imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI);
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imsi = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_IMSI);
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LOGPC(DBSSGP, LOGL_NOTICE, " IMSI = ");
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for (i = 0; i < imsi_len; i++)
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{
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LOGPC(DBSSGP, LOGL_NOTICE, "%02x", imsi[i]);
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}
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LOGPC(DBSSGP, LOGL_NOTICE, "\n");
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}
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gsmtap_send_llc(tbf->rlc_data,tbf->data_index);
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gprs_rlcmac_packet_downlink_assignment(tbf);
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}
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@ -105,7 +100,7 @@ int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_
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switch (pdu_type) {
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case BSSGP_PDUT_DL_UNITDATA:
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LOGP(DBSSGP, LOGL_NOTICE, "RX: [SGSN->PCU] BSSGP_PDUT_DL_UNITDATA\n");
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gprs_bssgp_pcu_rx_dl_ud(msg);
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gprs_bssgp_pcu_rx_dl_ud(msg, tp);
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break;
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case BSSGP_PDUT_PAGING_PS:
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LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
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@ -58,7 +58,7 @@ struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei);
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extern struct bssgp_bvc_ctx *bctx;
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int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg);
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int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp);
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int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
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