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send a reserved version number in version negotiation packets

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This commit is contained in:
Marten Seemann 2017-11-30 11:54:49 +07:00
parent 1f5cd31569
commit be29963637
6 changed files with 43 additions and 16 deletions
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16
internal/wire/version_negotiation.go
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@ -21,9 +21,7 @@ func ComposeGQUICVersionNegotiation(connID protocol.ConnectionID, versions []pro
utils.Errorf("error composing version negotiation packet: %s", err.Error())
return nil
}
for _, v := range versions {
utils.BigEndian.WriteUint32(fullReply, uint32(v))
}
writeVersions(fullReply, versions)
return fullReply.Bytes()
}
@ -48,8 +46,14 @@ func ComposeVersionNegotiation(
utils.Errorf("error composing version negotiation packet: %s", err.Error())
return nil
}
for _, v := range versions {
utils.BigEndian.WriteUint32(fullReply, uint32(v))
}
writeVersions(fullReply, versions)
return fullReply.Bytes()
}
// writeVersions writes the versions for a Version Negotiation Packet.
// It inserts one reserved version number at a random position.
func writeVersions(buf *bytes.Buffer, supported []protocol.VersionNumber) {
for _, v := range protocol.GetGreasedVersions(supported) {
utils.BigEndian.WriteUint32(buf, uint32(v))
}
}