55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package libp2p
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import (
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"os"
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"strings"
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"github.com/libp2p/go-libp2p"
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smux "github.com/libp2p/go-libp2p-core/mux"
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mplex "github.com/libp2p/go-libp2p-mplex"
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yamux "github.com/libp2p/go-libp2p-yamux"
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)
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func makeSmuxTransportOption(mplexExp bool) libp2p.Option {
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const yamuxID = "/yamux/1.0.0"
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const mplexID = "/mplex/6.7.0"
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ymxtpt := *yamux.DefaultTransport
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ymxtpt.AcceptBacklog = 512
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if os.Getenv("YAMUX_DEBUG") != "" {
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ymxtpt.LogOutput = os.Stderr
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}
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muxers := map[string]smux.Multiplexer{yamuxID: &ymxtpt}
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if mplexExp {
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muxers[mplexID] = mplex.DefaultTransport
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}
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// Allow muxer preference order overriding
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order := []string{yamuxID, mplexID}
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if prefs := os.Getenv("LIBP2P_MUX_PREFS"); prefs != "" {
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order = strings.Fields(prefs)
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}
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opts := make([]libp2p.Option, 0, len(order))
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for _, id := range order {
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tpt, ok := muxers[id]
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if !ok {
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log.Warning("unknown or duplicate muxer in LIBP2P_MUX_PREFS: %s", id)
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continue
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}
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delete(muxers, id)
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opts = append(opts, libp2p.Muxer(id, tpt))
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}
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return libp2p.ChainOptions(opts...)
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}
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func SmuxTransport(mplex bool) func() (opts Libp2pOpts, err error) {
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return func() (opts Libp2pOpts, err error) {
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opts.Opts = append(opts.Opts, makeSmuxTransportOption(mplex))
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return
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}
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}
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