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libwebsockets/minimal-examples/ws-client/minimal-ws-client-ping
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Andy Green f9f6bb66fe lws_validity: unified connection validity tracking 
Refactor everything around ping / pong handling in ws and h2, so there
is instead a protocol-independent validity lws_sul tracking how long it
has been since the last exchange that confirms the operation of the
network connection in both directions.

Clean out periodic role callback and replace the last two role users
with discrete lws_sul for each pt.
2019-09-22 09:35:07 -07:00
..
CMakeLists.txt clean: internally use LWS_WITH_CLIENT and _SERVER 2019-08-26 09:58:57 +01:00
libwebsockets.org.cer tls certs: update warmcat.com and libwebsockets.org public certs 2019-09-22 03:08:36 -07:00
minimal-ws-client-ping.c lws_validity: unified connection validity tracking 2019-09-22 09:35:07 -07:00
README.md lws_validity: unified connection validity tracking 2019-09-22 09:35:07 -07:00

README.md

lws minimal ws client PING

This connects to libwebsockets.org using the lws-mirror-protocol.

It then sends a ws PING every 5s and records any PONG coming back.

build

 $ cmake . && make

Commandline Options

Option Meaning
-d Set logging verbosity
--server Use a specific server instead of libwebsockets.org, eg --server localhost. Implies LCCSCF_ALLOW_SELFSIGNED
--port Use a specific port instead of 443, eg --port 7681
-z Send zero-length pings for testing
--protocol Use a specific ws subprotocol rather than lws-mirror-protocol, eg, --protocol myprotocol
-v Connection validity use 3s / 10s instead of default 5m / 5m10s

usage

Just run it, wait for the connect and then there will be PINGs sent at 5s intervals.

 $ ./lws-minimal-ws-client-ping
[2018/05/09 16:55:03:1160] USER: LWS minimal ws client PING
[2018/05/09 16:55:03:1379] NOTICE: Creating Vhost 'default' (serving disabled), 1 protocols, IPv6 off
[2018/05/09 16:55:03:1715] NOTICE: client loaded CA for verification ./libwebsockets.org.cer
[2018/05/09 16:55:03:1717] NOTICE: created client ssl context for default
[2018/05/09 16:55:04:8332] USER: callback_minimal_broker: established
[2018/05/09 16:55:09:8389] USER: Sending PING 10...
[2018/05/09 16:55:10:1491] USER: LWS_CALLBACK_CLIENT_RECEIVE_PONG
[2018/05/09 16:55:10:1494] NOTICE: 
[2018/05/09 16:55:10:1514] NOTICE: 0000: 70 69 6E 67 20 62 6F 64 79 21                      ping body!      
[2018/05/09 16:55:10:1515] NOTICE: 
...