VOL-2854: Add command line option to specify interface name in openolt on which gRPC server will run
          - OLT management interface or inband interface can be given as command line input and gRPC
            server will listen on given interface's IP address
          - If no interface name given gRPC server will listen on "0.0.0.0:9191"

Change-Id: I506fabf7ae81bf4d4ed8f6199107801daff62941
diff --git a/agent/common/core.h b/agent/common/core.h
index f73051e..31e10ed 100644
--- a/agent/common/core.h
+++ b/agent/common/core.h
@@ -238,6 +238,7 @@
 void stats_collection();
 Status check_connection();
 Status check_bal_ready();
+std::string get_ip_address(const char* nw_intf);
 
 // Stubbed defntions of bcmolt_cfg_get required for unit-test
 #ifdef TEST_MODE