ceremonyclient/go-libp2p/p2p/transport/quicreuse/quic_multiaddr.go
2023-08-20 23:07:43 -05:00

65 lines
1.5 KiB
Go

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