[3572] Discard DHCPv4 host options container if it is empty.

This is a small performance improvement.

diff --git a/src/bin/dhcp4/dhcp4_srv.cc b/src/bin/dhcp4/dhcp4_srv.cc
index 47afca878abb9ade0851de9d6d8f9c255cfc2918..05333e0cb77ea1ab6dde411d692e655be2ba3448 100644 (file)
--- a/src/bin/dhcp4/dhcp4_srv.cc
+++ b/src/bin/dhcp4/dhcp4_srv.cc
@@ -926,7 +926,7 @@ Dhcpv4Srv::buildCfgOptionList(Dhcpv4Exchange& ex) {
 
     // Firstly, host specific options.
     const ConstHostPtr& host = ex.getContext()->host_;
-    if (host) {
+    if (host && !host->getCfgOption4()->empty()) {
         co_list.push_back(host->getCfgOption4());
     }