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libwebsockets/lib/secure-streams/protocols
Andy Green 7eb36102a9 ss: server: h1, h2, ws basic support
Add initial support for defining servers using Secure Streams
policy and api semantics.

Serving h1, h2 and ws should be functional, the new minimal
example shows a combined http + SS server with an incrementing
ws message shown in the browser over tls, in around 200 lines
of user code.

NOP out anything to do with plugins, they're not currently used.

Update the docs correspondingly.
2020-07-27 12:05:24 +01:00
..
README.md client: secure streams 2020-03-04 12:17:49 +00:00
ss-h1.c ss: server: h1, h2, ws basic support 2020-07-27 12:05:24 +01:00
ss-h2.c ss: server: h1, h2, ws basic support 2020-07-27 12:05:24 +01:00
ss-mqtt.c ss: server: h1, h2, ws basic support 2020-07-27 12:05:24 +01:00
ss-raw.c ss: server: h1, h2, ws basic support 2020-07-27 12:05:24 +01:00
ss-ws.c ss: server: h1, h2, ws basic support 2020-07-27 12:05:24 +01:00

Lws Protocol bindings for Secure Streams

This directory contains the code wiring up normal lws protocols to Secure Streams.

The lws_protocols callback

This is the normal lws struct lws_protocols callback that handles events and traffic on the lws protocol being supported.

The various events and traffic are converted into calls using the Secure Streams api, and Secure Streams events.

The connect_munge helper

Different protocols have different semantics in the arguments to the client connect function, this protocol-specific helper is called to munge the connect_info struct to match the details of the protocol selected.

The ss->policy->aux string is used to hold protocol-specific information passed in the from the policy, eg, the URL path or websockets subprotocol name.

The (library-private) ss_pcols export

Each protocol binding exports two things to other parts of lws (they are not exported to user code)

  • a struct lws_protocols, including a pointer to the callback

  • a struct ss_pcols describing how secure_streams should use, including a pointer to the related connect_munge helper.

In ./lib/core-net/vhost.c, enabled protocols are added to vhost protcols lists so they may be used. And in ./lib/secure-streams/secure-streams.c, enabled struct ss_pcols are listed and checked for matches when the user creates a new Secure Stream.