sccp: Implement dpc_accessible()

Change-Id: I16b0aa71db5be2daf7a8c52da829a38ad564eb7b
---
M src/sccp_scrc.c
1 file changed, 21 insertions(+), 2 deletions(-)


git pull ssh://gerrit.osmocom.org:29418/libosmo-sigtran refs/changes/50/40250/1

diff --git a/src/sccp_scrc.c b/src/sccp_scrc.c
index 63ded9d..8a0ddd1 100644
--- a/src/sccp_scrc.c
+++ b/src/sccp_scrc.c
@@ -62,9 +62,28 @@
 	return false;
 }
 
-static bool dpc_accessible(struct osmo_sccp_instance *inst, uint32_t pc)
+static bool dpc_accessible(struct osmo_sccp_instance *inst, uint32_t dpc)
 {
-	/* TODO: implement this! */
+	struct osmo_ss7_route *rt;
+	struct osmo_ss7_route_label rtlabel;
+
+	if (osmo_ss7_pc_is_local(inst->ss7, dpc)) {
+		LOGP(DLSCCP, LOGL_DEBUG, "dpc_accessible(%u): true (local)\n", dpc);
+		return true;
+	}
+
+	rtlabel = (struct osmo_ss7_route_label){
+		.opc = 0,
+		.dpc = dpc,
+		.sls = 0,
+	};
+
+	rt = ss7_instance_lookup_route(inst->ss7, &rtlabel);
+	if (!rt) {
+		LOGP(DLSCCP, LOGL_INFO, "dpc_accessible(%u): false\n", dpc);
+		return false;
+	}
+	LOGP(DLSCCP, LOGL_DEBUG, "dpc_accessible(%u): true\n", dpc);
 	return true;
 }
 

