65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package quicreuse
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import (
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"errors"
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"net"
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"github.com/lucas-clemente/quic-go"
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ma "github.com/multiformats/go-multiaddr"
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manet "github.com/multiformats/go-multiaddr/net"
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)
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var (
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quicV1MA = ma.StringCast("/quic-v1")
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quicDraft29MA = ma.StringCast("/quic")
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)
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func ToQuicMultiaddr(na net.Addr, version quic.VersionNumber) (ma.Multiaddr, error) {
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udpMA, err := manet.FromNetAddr(na)
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if err != nil {
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return nil, err
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}
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switch version {
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case quic.VersionDraft29:
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return udpMA.Encapsulate(quicDraft29MA), nil
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case quic.Version1:
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return udpMA.Encapsulate(quicV1MA), nil
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default:
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return nil, errors.New("unknown QUIC version")
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}
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}
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func FromQuicMultiaddr(addr ma.Multiaddr) (*net.UDPAddr, quic.VersionNumber, error) {
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var version quic.VersionNumber
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var partsBeforeQUIC []ma.Multiaddr
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ma.ForEach(addr, func(c ma.Component) bool {
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switch c.Protocol().Code {
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case ma.P_QUIC:
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version = quic.VersionDraft29
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return false
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case ma.P_QUIC_V1:
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version = quic.Version1
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return false
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default:
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partsBeforeQUIC = append(partsBeforeQUIC, &c)
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return true
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}
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})
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if len(partsBeforeQUIC) == 0 {
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return nil, version, errors.New("no addr before QUIC component")
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}
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if version == 0 {
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// Not found
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return nil, version, errors.New("unknown QUIC version")
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}
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netAddr, err := manet.ToNetAddr(ma.Join(partsBeforeQUIC...))
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if err != nil {
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return nil, version, err
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}
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udpAddr, ok := netAddr.(*net.UDPAddr)
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if !ok {
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return nil, 0, errors.New("not a *net.UDPAddr")
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}
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return udpAddr, version, nil
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}
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