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hotfix: use 64k buffer to read tun device packet for windows tun device mtu 65535 (#404)

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This commit is contained in:
naison
2024-12-17 11:46:09 +08:00
committed by GitHub
parent 51166477c2
commit 68d550a80d
8 changed files with 43 additions and 43 deletions
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28
pkg/core/tunhandler.go
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@@ -96,24 +96,24 @@ type Device struct {
func (d *Device) readFromTun() {
for {
buf := config.SPool.Get().([]byte)[:]
buf := config.LPool.Get().([]byte)[:]
n, err := d.tun.Read(buf[:])
if err != nil {
config.SPool.Put(buf[:])
config.LPool.Put(buf[:])
log.Errorf("[TUN] Failed to read from tun: %v", err)
util.SafeWrite(d.chExit, err)
return
}
if n == 0 {
log.Errorf("[TUN] Read packet length 0")
config.SPool.Put(buf[:])
config.LPool.Put(buf[:])
continue
}
src, dst, err := util.ParseIP(buf[:n])
if err != nil {
log.Errorf("[TUN] Unknown packet")
config.SPool.Put(buf[:])
config.LPool.Put(buf[:])
continue
}
@@ -130,7 +130,7 @@ func (d *Device) readFromTun() {
func (d *Device) writeToTun() {
for e := range d.tunOutbound {
_, err := d.tun.Write(e.data[:e.length])
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
if err != nil {
util.SafeWrite(d.chExit, err)
return
@@ -278,17 +278,17 @@ func (p *Peer) sendErr(err error) {
func (p *Peer) readFromConn() {
for {
buf := config.SPool.Get().([]byte)[:]
buf := config.LPool.Get().([]byte)[:]
n, from, err := p.conn.ReadFrom(buf[:])
if err != nil {
config.SPool.Put(buf[:])
config.LPool.Put(buf[:])
p.sendErr(err)
return
}
src, dst, err := util.ParseIP(buf[:n])
if err != nil {
config.SPool.Put(buf[:])
config.LPool.Put(buf[:])
log.Errorf("[TUN] Unknown packet: %v", err)
continue
}
@@ -316,7 +316,7 @@ func (p *Peer) readFromTCPConn() {
src, dst, err := util.ParseIP(packet.Data)
if err != nil {
log.Errorf("[TUN] Unknown packet")
config.SPool.Put(packet.Data[:])
config.LPool.Put(packet.Data[:])
continue
}
u := &udpElem{
@@ -335,7 +335,7 @@ func (p *Peer) routePeer() {
if routeToAddr := p.routeMapUDP.RouteTo(e.dst); routeToAddr != nil {
log.Debugf("[UDP] Find UDP route to dst: %s -> %s", e.dst, routeToAddr)
_, err := p.conn.WriteTo(e.data[:e.length], routeToAddr)
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
if err != nil {
p.sendErr(err)
return
@@ -344,7 +344,7 @@ func (p *Peer) routePeer() {
log.Debugf("[TCP] Find TCP route to dst: %s -> %s", e.dst.String(), conn.(net.Conn).RemoteAddr())
dgram := newDatagramPacket(e.data[:e.length])
err := dgram.Write(conn.(net.Conn))
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
if err != nil {
log.Errorf("[TCP] udp-tun %s <- %s : %s", conn.(net.Conn).RemoteAddr(), dgram.Addr(), err)
p.sendErr(err)
@@ -367,7 +367,7 @@ func (p *Peer) routeTUN() {
if addr := p.routeMapUDP.RouteTo(e.dst); addr != nil {
log.Debugf("[TUN] Find UDP route to dst: %s -> %s", e.dst, addr)
_, err := p.conn.WriteTo(e.data[:e.length], addr)
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
if err != nil {
log.Debugf("[TUN] Failed wirte to route dst: %s -> %s", e.dst, addr)
p.sendErr(err)
@@ -377,7 +377,7 @@ func (p *Peer) routeTUN() {
log.Debugf("[TUN] Find TCP route to dst: %s -> %s", e.dst.String(), conn.(net.Conn).RemoteAddr())
dgram := newDatagramPacket(e.data[:e.length])
err := dgram.Write(conn.(net.Conn))
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
if err != nil {
log.Errorf("[TUN] Failed to write TCP %s <- %s : %s", conn.(net.Conn).RemoteAddr(), dgram.Addr(), err)
p.sendErr(err)
@@ -385,7 +385,7 @@ func (p *Peer) routeTUN() {
}
} else {
log.Errorf("[TUN] No route for src: %s -> dst: %s, drop it", e.src, e.dst)
config.SPool.Put(e.data[:])
config.LPool.Put(e.data[:])
}
}
}