mirrors/uquic
1
0
Fork 0
mirror of https://github.com/refraction-networking/uquic.git synced 2025-04-04 12:47:36 +03:00
Code Issues Projects Releases Packages Wiki Activity

qlog dropped version negotiation packets

Browse source
This commit is contained in:
Marten Seemann 2020-04-14 17:39:13 +07:00
parent 80418be227
commit 5b7b9c84d4
2 changed files with 57 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

9
client.go
View file

@ -330,18 +330,27 @@ func (c *client) handleVersionNegotiationPacket(p *receivedPacket) {
hdr, _, _, err := wire.ParsePacket(p.data, 0)
if err != nil {
if c.qlogger != nil {
c.qlogger.DroppedPacket(qlog.PacketTypeVersionNegotiation, protocol.ByteCount(len(p.data)), qlog.PacketDropHeaderParseError)
}
c.logger.Debugf("Error parsing Version Negotiation packet: %s", err)
return
}
// ignore delayed / duplicated version negotiation packets
if c.receivedVersionNegotiationPacket || c.versionNegotiated.Get() {
if c.qlogger != nil {
c.qlogger.DroppedPacket(qlog.PacketTypeVersionNegotiation, protocol.ByteCount(len(p.data)), qlog.PacketDropUnexpectedPacket)
}
c.logger.Debugf("Received a delayed Version Negotiation packet.")
return
}
for _, v := range hdr.SupportedVersions {
if v == c.version {
if c.qlogger != nil {
c.qlogger.DroppedPacket(qlog.PacketTypeVersionNegotiation, protocol.ByteCount(len(p.data)), qlog.PacketDropUnexpectedVersion)
}
// The Version Negotiation packet contains the version that we offered.
// This might be a packet sent by an attacker (or by a terribly broken server implementation).
return