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simplify writing of the gQUIC Version Negotiation Packet

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This commit is contained in:
Marten Seemann 2018-03-28 05:48:28 +07:00
parent 5e82335005
commit 1e9b3f0bb2
3 changed files with 36 additions and 48 deletions
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14
internal/wire/version_negotiation.go
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@ -10,17 +10,9 @@ import (
// ComposeGQUICVersionNegotiation composes a Version Negotiation Packet for gQUIC
func ComposeGQUICVersionNegotiation(connID protocol.ConnectionID, versions []protocol.VersionNumber) []byte {
buf := &bytes.Buffer{}
ph := Header{
ConnectionID: connID,
PacketNumber: 1,
VersionFlag: true,
IsVersionNegotiation: true,
}
if err := ph.writePublicHeader(buf, protocol.PerspectiveServer, protocol.VersionWhatever); err != nil {
utils.Errorf("error composing version negotiation packet: %s", err.Error())
return nil
}
buf := bytes.NewBuffer(make([]byte, 0, 1+8+len(versions)*4))
buf.Write([]byte{0x1 | 0x8}) // type byte
utils.BigEndian.WriteUint64(buf, uint64(connID))
for _, v := range versions {
utils.BigEndian.WriteUint32(buf, uint32(v))
}