
Security News
NVD Quietly Sweeps 100K+ CVEs Into a “Deferred” Black Hole
NVD now marks all pre-2018 CVEs as "Deferred," signaling it will no longer enrich older vulnerabilities, further eroding trust in its data.
github.com/cockroachdb/cmux
cmux is a generic Go library to multiplex connections based on their payload. Using cmux, you can serve gRPC, SSH, HTTPS, HTTP, Go RPC, and pretty much any other protocol on the same TCP listener.
Simply create your main listener, create a cmux for that listener, and then match connections:
// Create the main listener.
l, err := net.Listen("tcp", ":23456")
if err != nil {
log.Fatal(err)
}
// Create a cmux.
m := cmux.New(l)
// Match connections in order:
// First grpc, then HTTP, and otherwise Go RPC/TCP.
grpcL := m.Match(cmux.HTTP2HeaderField("content-type", "application/grpc"))
httpL := m.Match(cmux.HTTP1Fast())
trpcL := m.Match(cmux.Any()) // Any means anything that is not yet matched.
// Create your protocol servers.
grpcS := grpc.NewServer()
grpchello.RegisterGreeterServer(grpcs, &server{})
httpS := &http.Server{
Handler: &helloHTTP1Handler{},
}
trpcS := rpc.NewServer()
s.Register(&ExampleRPCRcvr{})
// Use the muxed listeners for your servers.
go grpcS.Serve(grpcL)
go httpS.Serve(httpL)
go trpcS.Accept(trpcL)
// Start serving!
m.Serve()
There are more examples on GoDoc.
Since we are only matching the very first bytes of a connection, the performance overhead on long-lived connections (i.e., RPCs and pipelined HTTP streams) is negligible.
TLS: net/http
uses a type assertion
to identify TLS connections; since cmux's lookahead-implementing connection
wraps the underlying TLS connection, this type assertion fails. This means you
can serve HTTPS using cmux but http.Request.TLS
will not be set in your
handlers. If you are able to wrap TLS around cmux, you can work around this
limitation. See https://github.com/cockroachdb/cockroach/commit/83caba2 for an
example of this approach.
Different Protocols on The Same Connection: cmux
matches the connection
when it's accepted. For example, one connection can be either gRPC or REST, but
not both. That is, we assume that a client connection is either used for gRPC
or REST.
Copyright 2016 The CMux Authors. All rights reserved.
See CONTRIBUTORS for the CMux Authors. Code is released under the Apache 2 license.
FAQs
Unknown package
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
NVD now marks all pre-2018 CVEs as "Deferred," signaling it will no longer enrich older vulnerabilities, further eroding trust in its data.
Research
Security News
Lazarus-linked threat actors expand their npm malware campaign with new RAT loaders, hex obfuscation, and over 5,600 downloads across 11 packages.
Security News
Safari 18.4 adds support for Iterator Helpers and two other TC39 JavaScript features, bringing full cross-browser coverage to key parts of the ECMAScript spec.