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send IETF draft style version negotiation packets

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Send a gQUIC Version Negotiation Packet, if the client packet has a
Public Header. If the client has an IETF draft style header, send an
IETF draft style Version Negotiation Packet.
This commit is contained in:
Marten Seemann 2017-10-29 18:19:24 +07:00
parent 515babb4bd
commit b0f34e776e
6 changed files with 108 additions and 36 deletions
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30
internal/wire/version_negotiation.go
View file

@ -7,18 +7,36 @@ import (
"github.com/lucas-clemente/quic-go/internal/utils"
)
// ComposeVersionNegotiation composes a Version Negotiation Packet
// TODO(894): implement the IETF draft format of Version Negotiation Packets
func ComposeVersionNegotiation(connectionID protocol.ConnectionID, versions []protocol.VersionNumber) []byte {
// ComposeGQUICVersionNegotiation composes a Version Negotiation Packet for gQUIC
func ComposeGQUICVersionNegotiation(connID protocol.ConnectionID, versions []protocol.VersionNumber) []byte {
fullReply := &bytes.Buffer{}
ph := Header{
ConnectionID: connectionID,
ConnectionID: connID,
PacketNumber: 1,
VersionFlag: true,
}
err := ph.writePublicHeader(fullReply, protocol.PerspectiveServer, protocol.VersionWhatever)
if err != nil {
if err := ph.writePublicHeader(fullReply, protocol.PerspectiveServer, protocol.VersionWhatever); err != nil {
utils.Errorf("error composing version negotiation packet: %s", err.Error())
return nil
}
for _, v := range versions {
utils.BigEndian.WriteUint32(fullReply, uint32(v))
}
return fullReply.Bytes()
}
// ComposeVersionNegotiation composes a Version Negotiation according to the IETF draft
func ComposeVersionNegotiation(connID protocol.ConnectionID, pn protocol.PacketNumber, versions []protocol.VersionNumber) []byte {
fullReply := &bytes.Buffer{}
ph := Header{
IsLongHeader: true,
Type: protocol.PacketTypeVersionNegotiation,
ConnectionID: connID,
PacketNumber: pn,
}
if err := ph.writeHeader(fullReply); err != nil {
utils.Errorf("error composing version negotiation packet: %s", err.Error())
return nil
}
for _, v := range versions {
utils.BigEndian.WriteUint32(fullReply, uint32(v))