diff options
Diffstat (limited to 'src/libmsc/gsm_04_08_cc.c')
| -rw-r--r-- | src/libmsc/gsm_04_08_cc.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c index ed29e8494..e950f0857 100644 --- a/src/libmsc/gsm_04_08_cc.c +++ b/src/libmsc/gsm_04_08_cc.c @@ -485,6 +485,70 @@ static void gsm48_start_cc_timer(struct gsm_trans *trans, int current, trans->cc.Tcurrent = current; } +struct osmo_lcls *lcls_compose(struct osmo_lcls *lcls_fixme_for_member, struct gsm_trans *trans, bool use_lac) +{ + /* FIXME: ensure that a interface is in use for this transaction + This fails test #13 because we have no sccp there Do we need this logging? + Can we get primary_pc elsewhere? */ + if (!trans->net->a.sri->sccp) + return NULL; + struct osmo_ss7_instance *ss7 = osmo_sccp_get_ss7(trans->net->a.sri->sccp); + struct osmo_lcls *lcls; + uint8_t w = osmo_ss7_pc_width(&ss7->cfg.pc_fmt); + + if (!trans) { + LOGP(DCC, LOGL_ERROR, "LCLS: unable to fill parameters for unallocated transaction\n"); + return NULL; + } + + if (!trans->net->vlr->cfg.lcls_enable) { + LOGP(DCC, LOGL_NOTICE, "LCLS disabled globally\n"); + return NULL; + } + + /* Why this test? Do we need it? Where to find conn now, if this is still valid? + if (!cc_trans->conn) { + LOGP(DCC, LOGL_ERROR, "LCLS: unable to fill parameters for transaction without connection\n"); + return NULL; + }*/ + + if (trans->msc_a->c.ran->type != OSMO_RAT_GERAN_A) { + LOGP(DCC, LOGL_ERROR, "LCLS: only A interface is supported at the moment\n"); + return NULL; + } + + lcls = talloc_zero(trans, struct osmo_lcls); + if (!lcls) { + LOGP(DCC, LOGL_ERROR, "LCLS: failed to allocate osmo_lcls\n"); + return NULL; + } + + LOGP(DCC, LOGL_INFO, "LCLS: using %u bits (%u bytes) for node ID\n", w, w / 8); + + lcls->gcr.net_len = 3; + lcls->gcr.node = ss7->cfg.primary_pc; + + /* net id from Q.1902.3 3-5 bytes, this function gives 3 bytes exactly */ + osmo_plmn_to_bcd(lcls->gcr.net, &trans->net->plmn); + + osmo_store32be(trans->callref, lcls->gcr.cr); + //osmo_store32be(0, lcls->gcr.cr); + osmo_store16be(use_lac ? trans->msc_a->via_cell.lai.lac : trans->msc_a->via_cell.cell_identity, lcls->gcr.cr + 3); + + LOGP(DCC, LOGL_INFO, "LCLS: allocated %s-based CR-ID %s\n", use_lac ? "LAC" : "CI", + osmo_hexdump(lcls->gcr.cr, 5)); + + lcls->config = GSM0808_LCLS_CFG_BOTH_WAY; + lcls->control = GSM0808_LCLS_CSC_CONNECT; + lcls->corr_needed = true; + lcls->gcr_available = true; + + LOGP(DCC, LOGL_DEBUG, "Filled %s\n", osmo_lcls_dump(lcls)); + LOGP(DCC, LOGL_DEBUG, "Filled %s\n", osmo_gcr_dump(lcls)); + + return lcls; +} + static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg) { struct gsm48_hdr *gh = msgb_l3(msg); @@ -498,6 +562,11 @@ static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg) memset(&setup, 0, sizeof(struct gsm_mncc)); setup.callref = trans->callref; + /* New Global Call Reference */ + trans->lcls = lcls_compose(trans->lcls, trans, true); + //if (lcls_compose(&trans-lcls, trans, true) + // LOG_TRANS(trans, LOGL_ERROR, "LCLS Error\n"); + tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); /* emergency setup is identified by msg_type */ if (msg_type == GSM48_MT_CC_EMERG_SETUP) { @@ -1856,6 +1925,9 @@ static int mncc_tx_to_gsm_cc(struct gsm_network *net, const union mncc_msg *msg) /* Find callref */ trans = trans_find_by_callref(net, data->callref); + if (trans) + LOG_TRANS(trans, LOGL_ERROR, "CC MNCC TX trans->lcls %s\n", osmo_gcr_dump(trans->lcls)); + /* Callref unknown */ if (!trans) { struct vlr_subscr *vsub; @@ -2145,6 +2217,8 @@ int gsm0408_rcv_cc(struct msc_a *msc_a, struct msgb *msg) /* Find transaction */ trans = trans_find_by_id(msc_a, TRANS_CC, transaction_id); + if (trans) + LOG_TRANS(trans, LOGL_ERROR, "RCV_CC trans->lcls %s\n", osmo_gcr_dump(trans->lcls)); /* Create transaction */ if (!trans) { |