add CTOS_EXTERNAL_ADDRESS (#2832)

gframe/duelclient.cpp

@@ -118,6 +118,15 @@ void DuelClient::ClientRead(bufferevent* bev, void* ctx) {
 void DuelClient::ClientEvent(bufferevent* bev, short events, void* ctx) {
 	if (events & BEV_EVENT_CONNECTED) {
 		bool create_game = (intptr_t)ctx;
+		if(!create_game) {
+			uint16_t hostname_buf[LEN_HOSTNAME];
+			auto hostname_len = BufferIO::CopyCharArray(mainGame->ebJoinHost->getText(), hostname_buf);
+			auto hostname_msglen = (hostname_len + 1) * sizeof(uint16_t);
+			char buf[LEN_HOSTNAME * sizeof(uint16_t) + sizeof(uint32_t)];
+			memset(buf, 0, sizeof(uint32_t)); // real_ip
+			memcpy(buf + sizeof(uint32_t), hostname_buf, hostname_msglen);
+			SendBufferToServer(CTOS_EXTERNAL_ADDRESS, buf, hostname_msglen + sizeof(uint32_t));
+		}
 		CTOS_PlayerInfo cspi;
 		BufferIO::CopyCharArray(mainGame->ebNickName->getText(), cspi.name);
 		SendPacketToServer(CTOS_PLAYER_INFO, cspi);

gframe/netserver.cpp

@@ -257,6 +257,15 @@ void NetServer::HandleCTOSPacket(DuelPlayer* dp, unsigned char* data, int len) {
 		BufferIO::CopyCharArray(pkt->name, dp->name);
 		break;
 	}
+	case CTOS_EXTERNAL_ADDRESS: {
+		// for other server & reverse proxy use only
+		/*
+		wchar_t hostname[LEN_HOSTNAME];
+		uint32_t real_ip = ntohl(BufferIO::ReadInt32(pdata));
+		BufferIO::CopyCharArray((uint16_t*)pdata, hostname);
+		*/
+		break;
+	}
 	case CTOS_CREATE_GAME: {
 		if(dp->game || duel_mode)
 			return;

gframe/network.h

@@ -103,6 +103,14 @@ struct CTOS_Kick {
 check_trivially_copyable(CTOS_Kick);
 static_assert(sizeof(CTOS_Kick) == 1, "size mismatch: CTOS_Kick");
 
+/*
+* CTOS_ExternalAddress
+* uint32_t real_ip; (IPv4 address, BE, alway 0 in normal client)
+* uint16_t hostname[256]; (UTF-16 string)
+*/
+
+constexpr int LEN_HOSTNAME = 256;
+
 // STOC
 struct STOC_ErrorMsg {
 	uint8_t msg{};
@@ -258,6 +266,7 @@ public:
 #define CTOS_SURRENDER		0x14	// no data
 #define CTOS_TIME_CONFIRM	0x15	// no data
 #define CTOS_CHAT			0x16	// uint16_t array
+#define CTOS_EXTERNAL_ADDRESS	0x17	// CTOS_ExternalAddress
 #define CTOS_HS_TODUELIST	0x20	// no data
 #define CTOS_HS_TOOBSERVER	0x21	// no data
 #define CTOS_HS_READY		0x22	// no data