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Websocket

Websocket is a data channel type in GOST.

TLS Certificate Configuration

For TLS configuration, please refer to TLS configuration。

Websocket

Unencrypted Websocket data channel.

gost -L ws://:8080

services:
- name: service-0
  addr: :
  handler:
    type: auto
  listener:
    type: ws

Websocket Secure

Websocket data channel based on TLS encryption.

gost -L wss://:8080

services:
- name: service-0
  addr: :
  handler:
    type: auto
  listener:
    type: wss

Multiplexing

GOST extends Websocket with multiplexing feature (mws, mwss), multiplexing is based on the xtaci/smux library.

gost -L mws://:8443

gost -L mwss://:8443

services:
- name: service-0
  addr: :
  handler:
    type: auto
  listener:
    type: mws
    # type: mwss
    metadata:
      mux.version: 1

Options

mux.version (int, default=1)
SMUX protocol version.
mux.keepaliveDisabled (bool, default=false)
Whether to disable keep-alive.
mux.keepaliveInterval (duration, default=10s)
Heartbeat interval.
mux.keepaliveTimeout (duration, default=30s)
Heartbeat timeout.
mux.maxFrameSize (int, default=32768)
Maximum frame length.
mux.maxReceiveBuffer (int, default=4194304)
Receive buffer size.
mux.maxStreamBuffer (int, default=65536)
Steam Buffer Size.

Custom Request Path

The request path can be customized via path option, the default value is /ws.

Path Matching Verification

The connection can be successfully established only when the path option set by the client and the server are the same.

Server

gost -L wss://:8443?path=/ws

services:
- name: service-0
  addr: :8443
  handler:
    type: auto
  listener:
    type: wss
    metadata:
      path: /ws

Client

gost -L http://:8080 -F wss://:8443?path=/ws

services:
- name: service-0
  addr: :8080
  handler:
    type: http
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :8443
      connector:
        type: http
      dialer:
        type: wss
        metadata:
          path: /ws

Custom Request Hostname

By default, the client uses the node address (-F parameter or the address specified in nodes.addr) as the request hostname (HTTP Host header). The request hostname can be customized through host option.

gost -L http://:8080 -F wss://:8443?host=example.com

services:
- name: service-0
  addr: :8080
  handler:
    type: http
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :8443
      connector:
        type: http
      dialer:
        type: wss
        metadata:
          host: example.com

Custom HTTP Request Headers

You can customize the request header information through header option.

services:
- name: service-0
  addr: :8080
  handler:
    type: http
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :8443
      connector:
        type: http
      dialer:
        type: wss
        metadata:
          header:
            User-Agent: "gost/3.0"
            foo: bar

Keep-Alive

The client can enable keep-alive through keepalive option and set the interval for sending heartbeat packets through ttl option.

gost -L http://:8080 -F "wss://:8443?keepalive=true&ttl=15s"

services:
- name: service-0
  addr: :8080
  handler:
    type: http
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :8443
      connector:
        type: http
      dialer:
        type: wss
        metadata:
          keepalive: true
          ttl: 15s

Proxy

Websocket tunnel can be used in combination with various proxy protocols.

HTTP Over Websocket

gost -L http+wss://:8443

services:
- name: service-0
  addr: :8443
  handler:
    type: http
  listener:
    type: wss
    # type: mwss

SOCKS5 Over Websocket

gost -L socks5+wss://:8443

services:
- name: service-0
  addr: :8443
  handler:
    type: socks5
  listener:
    type: wss
    # type: mwss

Relay Over Websocket

gost -L relay+wss://:8443

services:
- name: service-0
  addr: :8443
  handler:
    type: relay
  listener:
    type: wss
    # type: mwss

Port Forwarding

Websocket tunnel can also be used as port forwarding.

Server

gost -L wss://:8443/:1080 -L socks5://:1080

is equivalent to

gost -L forward+wss://:8443/:1080 -L socks5://:1080

services:
- name: service-0
  addr: :8443
  handler:
    type: forward
  listener:
    type: wss
  forwarder:
    nodes:
    - name: target-0
      addr: :1080
- name: service-1
  addr: :1080
  handler:
    type: socks5
  listener:
    type: tcp

By using port forwarding of the websocket tunnel, a websocket data channel is added to the SOCKS5 proxy service on port 1080.

At this time, port 8443 is equivalent to:

gost -L socks5+wss://:8443

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