Fixes some bugs in parsing the program_options.

1 files changed, 8 insertions, 2 deletions

diff --git a/node/main.cpp b/node/main.cpp
index 031e0d0..85b0ca5 100644
--- a/node/main.cpp
+++ b/node/main.cpp
@@ -22,7 +22,7 @@ int main(int argc, char* argv[]) {
 		("interface4,4", po::value<std::string>()->default_value("0.0.0.0"), "Set the ipv4 address to listen on.")
 		("enable_v6", po::value<bool>()->default_value(true), "Enable/disable ipv6 accept support.")
 		("interface6,6", po::value<std::string>()->default_value("::"), "Set the ipv6 address to listen on.")
-		("next_node,n", po::value<std::string>()->required(), "The address of the next node in the network")
+		("next_node,n", po::value<std::string>(), "The address of the next node in the network")
 		("first,f", "This is the first node and will be the communication point for the clients.")
 	;
 
@@ -44,7 +44,13 @@ int main(int argc, char* argv[]) {
 	ListenSettings lsettings{en4, if4, en6, if6, port};
 
 	bool is_first = bool(vm.count("first"));
-	std::string next_node = vm["next_node"].as<std::string>();
+	std::string next_node;
+	if(vm.count("next_node")) {
+		next_node = vm["next_node"].as<std::string>();
+	} else {
+		std::cerr << "next_node option is required." << std::endl;
+		return -1;
+	}
 	
 	Uri uri = parse_uri(next_node);