Lex
September 14, 2021, 10:05am
1
Hello,
Defold: 1.2.186
I’m using Nakama with Defold.
When I open the app without a VPN (I’m in Europe), the app connects to the server and everything works fine.
As soon as I set up the VPN in a “far” country (Canada, UAE), I get the following error:
WARNING:WEBSOCKET: STATE_CREATE -> STATE_CONNECTING
ERROR:DLIB: mbedtls_ssl_handshake failed: Unknown error - -26624 (-0x6800)
ERROR:DLIB: SSL handshake timeout
WARNING:WEBSOCKET: STATUS: 'Failed to open connection: WOULDBLOCK' len: 37
WARNING:WEBSOCKET: STATE_CONNECTING -> STATE_DISCONNECTED
DEBUG:SCRIPT: Problem connection
DEBUG:SCRIPT: Failed to open connection: WOULDBLOCK
The issues arises when trying to connect with a websocket.
socket.connection = websocket.connect(...)
Does anyone know what the issue is? And how to solve it? Here’s my config.yml on Nakama’s side :
socket:
server_key: "XXXXXXX"
port: 7350
address: ""
protocol: "tcp"
max_message_size_bytes: 4096
max_request_size_bytes: 131072
read_buffer_size_bytes: 4096
write_buffer_size_bytes: 4096
read_timeout_ms: 30000
write_timeout_ms: 30000
idle_timeout_ms: 60000
write_wait_ms: 10000
pong_wait_ms: 10000
ping_period_ms: 8000
ping_backoff_threshold: 20
outgoing_queue_size: 64
ssl_certificate: "" #/nakama/data/cert.pem"
ssl_private_key: "" #/nakama/data/key.pem"
I posted also on Nakama forum because I’m not sure if the issue comes from Nakama and Defold.
britzl
September 14, 2021, 10:39am
2
The timeout happens here:
if (ret != 0)
{
SSL_LOGE("mbedtls_ssl_handshake failed", ret);
if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED)
{
dmLogError("Unable to verify the server's certificate.");
return RESULT_CONNREFUSED;
}
else if (ret == MBEDTLS_ERR_SSL_TIMEOUT)
{
dmLogError("SSL handshake timeout");
return RESULT_WOULDBLOCK;
}
return RESULT_HANDSHAKE_FAILED;
}
This is part of the process when the connection is created:
static Result Connect(HPool pool, const char* host, dmSocket::Address address, uint16_t port, bool ssl, int timeout, Connection* c, dmSocket::Result* sr)
{
uint64_t connectstart = dmTime::GetTime();
Result r = ConnectSocket(pool, address, port, timeout, c, sr);
if( r != RESULT_OK )
{
c->m_Socket = dmSocket::INVALID_SOCKET_HANDLE;
return r;
}
uint64_t handshakestart = dmTime::GetTime();
if( timeout > 0 && (handshakestart - connectstart) > (uint64_t)timeout )
{
dmSocket::Delete(c->m_Socket);
c->m_Socket = dmSocket::INVALID_SOCKET_HANDLE;
return RESULT_SOCKET_ERROR;
}
if (RESULT_OK == r && ssl) {
This file has been truncated. show original
As you can see there’s a timeout being passed around. What kind of timeout have you set when connecting the socket? See example here:
I now see that you mentioned that you are using Nakama. The timeout can be configured for the Nakama client when the client is created:
local defold = require "nakama.engine.defold"
local nakama = require "nakama.nakama"
local config = {
host = "127.0.0.1",
port = 7350,
use_ssl = false,
username = "defaultkey",
password = "",
engine = defold,
timeout = 10, -- connection timeout in seconds
}
local client = nakama.create_client(config)
1 Like
Lex
September 14, 2021, 10:45am
3
@britzl I looked at the code of the extension and realized the websocket has undocumented configuration parameters. I set
[websocket]
debug = 1
socket_timeout = 10000000
in my game.project and it just worked!
By the way, adding a timeout value in nakama parameter didn’t fix the issue:
local config = {
host = "127.0.0.1",
port = 7350,
use_ssl = false,
username = "defaultkey",
password = "",
engine = defold,
timeout = 10,
}
1 Like
britzl
September 14, 2021, 11:21am
4
Lex:
in my game.project and it just worked!
By the way, adding a timeout value in nakama parameter didn’t fix the issue:
Ah, yes, there’s two different timeouts. The one you are using deals with the underlying socket timeout and the one I mentioned is for the high level websocket timeout. Sorry for the confusion!
1 Like
britzl
September 14, 2021, 11:31am
5
Added this to the documentation:
---
title: Defold websocket extension API documentation
brief: This manual covers how to use websockets with Defold
---
# Defold websocket extension API documentation
This extension supports both secure (`wss://`) and non secure (`ws://`) websocket connections.
All platforms should support this extension.
Here is how you connect to a websocket and listen to events:
```lua
local function websocket_callback(self, conn, data)
if data.event == websocket.EVENT_DISCONNECTED then
print("Disconnected: " .. tostring(conn))
self.connection = nil
update_gui(self)
elseif data.event == websocket.EVENT_CONNECTED then
show original
3 Likes