4 files changed, 13 insertions, 13 deletions
diff --git a/src/network/network_func.h b/src/network/network_func.h
index 6a21eb80a..22ed04c32 100644
--- a/src/network/network_func.h
+++ b/src/network/network_func.h
@@ -80,9 +80,9 @@ void NetworkServerDoMove(ClientID client_id, CompanyID company_id);
 void NetworkServerSendRcon(ClientID client_id, TextColour colour_code, const std::string &string);
 void NetworkServerSendChat(NetworkAction action, DestType type, int dest, const std::string &msg, ClientID from_id, int64 data = 0, bool from_admin = false);
 
-void NetworkServerKickClient(ClientID client_id, const char *reason);
-uint NetworkServerKickOrBanIP(ClientID client_id, bool ban, const char *reason);
-uint NetworkServerKickOrBanIP(const char *ip, bool ban, const char *reason);
+void NetworkServerKickClient(ClientID client_id, const std::string &reason);
+uint NetworkServerKickOrBanIP(ClientID client_id, bool ban, const std::string &reason);
+uint NetworkServerKickOrBanIP(const std::string &ip, bool ban, const std::string &reason);
 
 void NetworkInitChatMessage();
 void CDECL NetworkAddChatMessage(TextColour colour, uint duration, const std::string &message);
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
index bd91cc25a..9048ad854 100644
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -1661,7 +1661,7 @@ enum DropDownAdmin {
  */
 static void AdminClientKickCallback(Window *w, bool confirmed)
 {
-	if (confirmed) NetworkServerKickClient(_admin_client_id, nullptr);
+	if (confirmed) NetworkServerKickClient(_admin_client_id, {});
 }
 
 /**
@@ -1671,7 +1671,7 @@ static void AdminClientKickCallback(Window *w, bool confirmed)
  */
 static void AdminClientBanCallback(Window *w, bool confirmed)
 {
-	if (confirmed) NetworkServerKickOrBanIP(_admin_client_id, true, nullptr);
+	if (confirmed) NetworkServerKickOrBanIP(_admin_client_id, true, {});
 }
 
 /**
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
index d15263e53..b981b11a0 100644
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -429,12 +429,12 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendCompanyInfo()
  * @param error The error to disconnect for.
  * @param reason In case of kicking a client, specifies the reason for kicking the client.
  */
-NetworkRecvStatus ServerNetworkGameSocketHandler::SendError(NetworkErrorCode error, const char *reason)
+NetworkRecvStatus ServerNetworkGameSocketHandler::SendError(NetworkErrorCode error, const std::string &reason)
 {
 	Packet *p = new Packet(PACKET_SERVER_ERROR);
 
 	p->Send_uint8(error);
-	if (reason != nullptr) p->Send_string(reason);
+	if (!reason.empty()) p->Send_string(reason);
 	this->SendPacket(p);
 
 	StringID strid = GetNetworkErrorMsg(error);
@@ -447,7 +447,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendError(NetworkErrorCode err
 
 		DEBUG(net, 1, "'%s' made an error and has been disconnected: %s", client_name, GetString(strid).c_str());
 
-		if (error == NETWORK_ERROR_KICKED && reason != nullptr) {
+		if (error == NETWORK_ERROR_KICKED && !reason.empty()) {
 			NetworkTextMessage(NETWORK_ACTION_KICKED, CC_DEFAULT, false, client_name, reason, strid);
 		} else {
 			NetworkTextMessage(NETWORK_ACTION_LEAVE, CC_DEFAULT, false, client_name, "", strid);
@@ -2054,7 +2054,7 @@ void NetworkServerSendRcon(ClientID client_id, TextColour colour_code, const std
  * @param client_id The client to kick.
  * @param reason In case of kicking a client, specifies the reason for kicking the client.
  */
-void NetworkServerKickClient(ClientID client_id, const char *reason)
+void NetworkServerKickClient(ClientID client_id, const std::string &reason)
 {
 	if (client_id == CLIENT_ID_SERVER) return;
 	NetworkClientSocket::GetByClientID(client_id)->SendError(NETWORK_ERROR_KICKED, reason);
@@ -2066,7 +2066,7 @@ void NetworkServerKickClient(ClientID client_id, const char *reason)
  * @param ban Whether to ban or kick.
  * @param reason In case of kicking a client, specifies the reason for kicking the client.
  */
-uint NetworkServerKickOrBanIP(ClientID client_id, bool ban, const char *reason)
+uint NetworkServerKickOrBanIP(ClientID client_id, bool ban, const std::string &reason)
 {
 	return NetworkServerKickOrBanIP(NetworkClientSocket::GetByClientID(client_id)->GetClientIP(), ban, reason);
 }
@@ -2077,7 +2077,7 @@ uint NetworkServerKickOrBanIP(ClientID client_id, bool ban, const char *reason)
  * @param ban Whether to ban or just kick.
  * @param reason In case of kicking a client, specifies the reason for kicking the client.
  */
-uint NetworkServerKickOrBanIP(const char *ip, bool ban, const char *reason)
+uint NetworkServerKickOrBanIP(const std::string &ip, bool ban, const std::string &reason)
 {
 	/* Add address to ban-list */
 	if (ban) {
@@ -2101,7 +2101,7 @@ uint NetworkServerKickOrBanIP(const char *ip, bool ban, const char *reason)
 	for (NetworkClientSocket *cs : NetworkClientSocket::Iterate()) {
 		if (cs->client_id == CLIENT_ID_SERVER) continue;
 		if (cs->client_id == _redirect_console_to_client) continue;
-		if (cs->client_address.IsInNetmask(ip)) {
+		if (cs->client_address.IsInNetmask(ip.c_str())) {
 			NetworkServerKickClient(cs->client_id, reason);
 			n++;
 		}
diff --git a/src/network/network_server.h b/src/network/network_server.h
index 850b56007..7a3fa3eac 100644
--- a/src/network/network_server.h
+++ b/src/network/network_server.h
@@ -93,7 +93,7 @@ public:
 	NetworkRecvStatus SendMove(ClientID client_id, CompanyID company_id);
 
 	NetworkRecvStatus SendClientInfo(NetworkClientInfo *ci);
-	NetworkRecvStatus SendError(NetworkErrorCode error, const char *reason = nullptr);
+	NetworkRecvStatus SendError(NetworkErrorCode error, const std::string &reason = {});
 	NetworkRecvStatus SendChat(NetworkAction action, ClientID client_id, bool self_send, const std::string &msg, int64 data);
 	NetworkRecvStatus SendJoin(ClientID client_id);
 	NetworkRecvStatus SendFrame();