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implement sending of stateless resets

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This commit is contained in:
Marten Seemann 2019-03-06 13:58:32 +09:00
parent 6cf20310fe
commit 94046cdb4b
13 changed files with 199 additions and 46 deletions
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27
multiplexer.go
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@ -1,6 +1,7 @@
package quic
import (
"bytes"
"fmt"
"net"
"sync"
@ -14,13 +15,14 @@ var (
)
type multiplexer interface {
AddConn(net.PacketConn, int) (packetHandlerManager, error)
AddConn(c net.PacketConn, connIDLen int, statelessResetKey []byte) (packetHandlerManager, error)
RemoveConn(net.PacketConn) error
}
type connManager struct {
connIDLen int
manager packetHandlerManager
connIDLen int
statelessResetKey []byte
manager packetHandlerManager
}
// The connMultiplexer listens on multiple net.PacketConns and dispatches
@ -29,7 +31,7 @@ type connMultiplexer struct {
mutex sync.Mutex
conns map[net.PacketConn]connManager
newPacketHandlerManager func(net.PacketConn, int, utils.Logger) packetHandlerManager // so it can be replaced in the tests
newPacketHandlerManager func(net.PacketConn, int, []byte, utils.Logger) packetHandlerManager // so it can be replaced in the tests
logger utils.Logger
}
@ -47,19 +49,30 @@ func getMultiplexer() multiplexer {
return connMuxer
}
func (m *connMultiplexer) AddConn(c net.PacketConn, connIDLen int) (packetHandlerManager, error) {
func (m *connMultiplexer) AddConn(
c net.PacketConn,
connIDLen int,
statelessResetKey []byte,
) (packetHandlerManager, error) {
m.mutex.Lock()
defer m.mutex.Unlock()
p, ok := m.conns[c]
if !ok {
manager := m.newPacketHandlerManager(c, connIDLen, m.logger)
p = connManager{connIDLen: connIDLen, manager: manager}
manager := m.newPacketHandlerManager(c, connIDLen, statelessResetKey, m.logger)
p = connManager{
connIDLen: connIDLen,
statelessResetKey: statelessResetKey,
manager: manager,
}
m.conns[c] = p
}
if p.connIDLen != connIDLen {
return nil, fmt.Errorf("cannot use %d byte connection IDs on a connection that is already using %d byte connction IDs", connIDLen, p.connIDLen)
}
if statelessResetKey != nil && !bytes.Equal(p.statelessResetKey, statelessResetKey) {
return nil, fmt.Errorf("cannot use different stateless reset keys on the same packet conn")
}
return p.manager, nil
}