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feat: full frag support

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This commit is contained in:
Toby
2022-02-25 17:08:54 -08:00
parent 6efa976a56
commit 1789db9ade
3 changed files with 71 additions and 20 deletions
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47
pkg/core/server_client.go
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@@ -10,6 +10,7 @@ import (
"github.com/tobyxdd/hysteria/pkg/acl"
"github.com/tobyxdd/hysteria/pkg/transport"
"github.com/tobyxdd/hysteria/pkg/utils"
"math/rand"
"net"
"strconv"
"sync"
@@ -35,6 +36,7 @@ type serverClient struct {
udpSessionMutex sync.RWMutex
udpSessionMap map[uint32]*net.UDPConn
nextUDPSessionID uint32
udpDefragger defragger
}
func newServerClient(cs quic.Session, transport *transport.ServerTransport, auth []byte, disableUDP bool, ACLEngine *acl.Engine,
@@ -123,43 +125,47 @@ func (c *serverClient) handleMessage(msg []byte) {
if err != nil {
return
}
dfMsg := c.udpDefragger.Feed(udpMsg)
if dfMsg == nil {
return
}
c.udpSessionMutex.RLock()
conn, ok := c.udpSessionMap[udpMsg.SessionID]
conn, ok := c.udpSessionMap[dfMsg.SessionID]
c.udpSessionMutex.RUnlock()
if ok {
// Session found, send the message
action, arg := acl.ActionDirect, ""
var ipAddr *net.IPAddr
if c.ACLEngine != nil {
action, arg, ipAddr, err = c.ACLEngine.ResolveAndMatch(udpMsg.Host)
action, arg, ipAddr, err = c.ACLEngine.ResolveAndMatch(dfMsg.Host)
} else {
ipAddr, err = c.Transport.ResolveIPAddr(udpMsg.Host)
ipAddr, err = c.Transport.ResolveIPAddr(dfMsg.Host)
}
if err != nil {
return
}
switch action {
case acl.ActionDirect, acl.ActionProxy: // Treat proxy as direct on server side
_, _ = conn.WriteToUDP(udpMsg.Data, &net.UDPAddr{
_, _ = conn.WriteToUDP(dfMsg.Data, &net.UDPAddr{
IP: ipAddr.IP,
Port: int(udpMsg.Port),
Port: int(dfMsg.Port),
Zone: ipAddr.Zone,
})
if c.UpCounter != nil {
c.UpCounter.Add(float64(len(udpMsg.Data)))
c.UpCounter.Add(float64(len(dfMsg.Data)))
}
case acl.ActionBlock:
// Do nothing
case acl.ActionHijack:
hijackIPAddr, err := c.Transport.ResolveIPAddr(arg)
if err == nil {
_, _ = conn.WriteToUDP(udpMsg.Data, &net.UDPAddr{
_, _ = conn.WriteToUDP(dfMsg.Data, &net.UDPAddr{
IP: hijackIPAddr.IP,
Port: int(udpMsg.Port),
Port: int(dfMsg.Port),
Zone: hijackIPAddr.Zone,
})
if c.UpCounter != nil {
c.UpCounter.Add(float64(len(udpMsg.Data)))
c.UpCounter.Add(float64(len(dfMsg.Data)))
}
}
default:
@@ -297,14 +303,29 @@ func (c *serverClient) handleUDP(stream quic.Stream) {
for {
n, rAddr, err := conn.ReadFromUDP(buf)
if n > 0 {
var msgBuf bytes.Buffer
_ = struc.Pack(&msgBuf, &udpMessage{
msg := udpMessage{
SessionID: id,
Host: rAddr.IP.String(),
Port: uint16(rAddr.Port),
FragCount: 1,
Data: buf[:n],
})
_ = c.CS.SendMessage(msgBuf.Bytes())
}
// try no frag first
var msgBuf bytes.Buffer
_ = struc.Pack(&msgBuf, &msg)
err = c.CS.SendMessage(msgBuf.Bytes())
if err != nil {
if errSize, ok := err.(quic.ErrMessageToLarge); ok {
// need to frag
msg.MsgID = uint16(rand.Intn(0xFFFF)) + 1 // msgID must be > 0 when fragCount > 1
fragMsgs := fragUDPMessage(msg, int(errSize))
for _, fragMsg := range fragMsgs {
msgBuf.Reset()
_ = struc.Pack(&msgBuf, &fragMsg)
_ = c.CS.SendMessage(msgBuf.Bytes())
}
}
}
if c.DownCounter != nil {
c.DownCounter.Add(float64(n))
}