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libwebsockets/minimal-examples/raw/minimal-raw-netcat
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Andy Green 498a4e2bd7 sul: all timed objects use a single pt sul list 
wsi timeout, wsi hrtimer, sequencer timeout and vh-protocol timer
all now participate on a single sorted us list.

The whole idea of polling wakes is thrown out, poll waits ignore the
timeout field and always use infinite timeouts.

Introduce a public api that can schedule its own callback from the event
loop with us resolution (usually ms is all the platform can do).

Upgrade timeouts and sequencer timeouts to also be able to use us resolution.

Introduce a prepared fakewsi in the pt, so we don't have to allocate
one on the heap when we need it.

Directly handle vh-protocol timer if LWS_MAX_SMP == 1
2019-08-09 10:12:09 +01:00
..
CMakeLists.txt minimal-raw-netcat 2018-05-02 08:46:16 +08:00
minimal-raw-netcat.c sul: all timed objects use a single pt sul list 2019-08-09 10:12:09 +01:00
README.md minimal-raw-netcat 2018-05-02 08:46:16 +08:00

README.md

lws minimal raw netcat

This example shows to to create a "netcat" that copies its stdin to a remote socket and prints what is returned in stdout.

It has some advantage over the real netcat, it will wait 1s after stdin closes to print results that are in flight.

build

 $ cmake . && make

usage

 $ echo -e -n "GET / http/1.1\r\n\r\n"| ./lws-minimal-raw-netcat
[2018/05/02 08:53:53:2665] USER: LWS minimal raw netcat [--server ip] [--port port]
[2018/05/02 08:53:53:2667] NOTICE: Creating Vhost 'default' (no listener), 1 protocols, IPv6 off
[2018/05/02 08:53:53:2703] USER: Starting connect...
[2018/05/02 08:53:53:5644] USER: Connected to libwebsockets.org:80...
[2018/05/02 08:53:53:5645] USER: LWS_CALLBACK_RAW_ADOPT
[2018/05/02 08:53:53:5645] USER: LWS_CALLBACK_RAW_ADOPT_FILE
[2018/05/02 08:53:53:5646] USER: LWS_CALLBACK_RAW_RX_FILE
[2018/05/02 08:53:53:5646] USER: LWS_CALLBACK_RAW_CLOSE_FILE
[2018/05/02 08:53:53:8600] USER: LWS_CALLBACK_RAW_RX (186)
HTTP/1.1 301 Redirect
server: lwsws
Strict-Transport-Security: max-age=15768000 ; includeSubDomains
location: https://libwebsockets.org
content-type: text/html
content-length: 0

Note the example does everything itself, after 5s idle the remote server closes the connection after which the example continues until you ^C it.