bssgp: Introduce "GLOBAL" port for PTP BVC

There are some messages/procedures on a PTP BVC which are not related
to one specific TLLI, but affect the whole PTP BVC.  First and foremost
that is the FLOW-CONTROL-BVC. Let's check if the user is interested in
handling those internally (by connecting to the GLOBAL port).  If not,
fall back to acknowledging all incoing FC-BVC and ignoring all ACKs.

Related: OS#4891
Change-Id: Ib80a6a522dbcb33fd0e7bd31a73ef28fdc636f57
changes/29/21629/1
Harald Welte 2 years ago
parent 27a70cc453
commit 71449b0a13
  1. 32
      library/BSSGP_Emulation.ttcnpp

@ -698,7 +698,10 @@ type component BSSGP_BVC_CT {
/* port to a management instance */
port BSSGP_BVC_MGMT_SP_PT MGMT;
/* BSSGP-User SAP towards the user (Client) */
/* per-BVC global port for e.g. BVC Flow Control */
port BSSGP_SP_PT GLOBAL;
/* BSSGP-User SAP towards the user (per-TLLI, Client) */
port BSSGP_SP_PT BSSGP_SP;
port BSSGP_SP_PT BSSGP_SP_SIG;
port BSSGP_PROC_PT BSSGP_PROC;
@ -1119,16 +1122,24 @@ private altstep as_ptp_unblocked() runs on BSSGP_BVC_CT {
[] as_ptp_handle_inbound_reset();
/* simply acknowledge all per-BVC Flow Control Messages */
[g_sgsn_role] BVC.receive(tr_ptp_BnsUdInd(tr_BVC_FC_BVC, g_cfg.bvci)) -> value udi {
var OCT1 tag := udi.bssgp.pDU_BSSGP_FLOW_CONTROL_BVC.tag.unstructured_Value;
BVC.send(ts_ptp_BnsUdReq(t_BVC_FC_BVC_ACK(tag), g_cfg.bvci, g_bvc_lsp));
if (GLOBAL.checkstate("Connected")) {
GLOBAL.send(udi.bssgp);
} else {
/* simply acknowledge all per-BVC Flow Control Messages */
var OCT1 tag := udi.bssgp.pDU_BSSGP_FLOW_CONTROL_BVC.tag.unstructured_Value;
BVC.send(ts_ptp_BnsUdReq(t_BVC_FC_BVC_ACK(tag), g_cfg.bvci, g_bvc_lsp));
}
}
/*
[g_sgsn_role] BVC.receive(tr_ptp_BnsUdInd(t_BVC_FC_MS, g_cfg.bvci)) {
BVC.send(ts_ptp_BnsUdReq(t_BVC_FC_MS_ACK, g_cfg.bvci));
[not g_sgsn_role] BVC.receive(tr_ptp_BnsUdInd(t_BVC_FC_BVC_ACK(?), g_cfg.bvci)) -> value udi {
if (GLOBAL.checkstate("Connected")) {
GLOBAL.send(udi.bssgp);
} else {
/* ignore any incoming flow control ACK */
}
}
*/
/* Any other PTP BSSGP message: If it has TLLI, route to component; otherwise broadcast */
[] BVC.receive(tr_ptp_BnsUdInd(?, g_cfg.bvci)) -> value udi {
var BssgpDecoded dec := f_dec_bssgp(udi.bssgp);
@ -1221,6 +1232,11 @@ private altstep as_ptp_unblocked() runs on BSSGP_BVC_CT {
BVC.send(ts_ptp_BnsUdReq(ts_BSSGP_DL_UD(tlli, llc_enc), g_cfg.bvci, oct2int(tlli)));
}
/* Testcase sends us BSSGP on global port */
[] GLOBAL.receive(PDU_BSSGP:?)-> value bs_pdu sender vc_conn {
BVC.send(ts_ptp_BnsUdReq(bs_pdu, g_cfg.bvci, g_bvc_lsp));
}
[] MGMT.receive(BssgpBlockRequest:?) -> value bbr {
f_ptp_sendBlock(bbr.cause);
}

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