gbproxy: Add todo for BVC RESET logic

When we receive a signalling BVC RESET from the SGSN we want to reset
the signalling BVCs for every peer.

Change-Id: I98c1a53d0e4b9a988e9ddec97ce0c67ded6f6326
Related: SYS#4998

src/gb_proxy.c

@@ -1218,7 +1218,16 @@ static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg,
 	case BSSGP_PDUT_BVC_RESET_ACK:
 		if (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei)
 			break;
-		/* fall through */
+		/* simple case: BVCI IE is mandatory */
+		if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))
+			goto err_mand_ie;
+		bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI));
+		if (bvci == BVCI_SIGNALLING) {
+			/* TODO: Reset all PTP BVCIs */
+		} else {
+			rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci);
+		}
+		break;
 	case BSSGP_PDUT_FLUSH_LL:
 		/* simple case: BVCI IE is mandatory */
 		if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))

tests/gbproxy/gbproxy_test.ok

@@ -3236,7 +3236,6 @@ NS2 CALLBACK, prim 0, msg length 5, bvci 0x0000
 23 04 82 10 02 
 
 Gbproxy global:
-    Invalid BVC Identifier          : 1
     Patch error: no peer            : 1
 Peers:
   NSEI 4096, BVCI 4098, not blocked, RAI 112-332-16464-96
@@ -4307,7 +4306,6 @@ Peers:
     Detach Accept count             : 3
     TLLI-Cache: 0
 Gbproxy global:
-    Invalid BVC Identifier          : 1
     BSSGP protocol error      (SGSN): 2
     Patch error: no peer            : 1
 === test_gbproxy_keep_info ===