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add connection padding on server side

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Shelikhoo 2025-01-29 11:46:33 +00:00
parent 53172a588b
commit 0aa1470e01
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3 changed files with 24 additions and 4 deletions
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10
server/lib/http.go
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@ -5,7 +5,7 @@ import (
"crypto/rand"
"crypto/sha256"
"encoding/binary"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/messages"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/packetpadding"
"io"
"log"
"net"
@ -15,6 +15,7 @@ import (
"github.com/gorilla/websocket"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/messages"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/turbotunnel"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/websocketconn"
)
@ -142,6 +143,9 @@ func (handler *httpHandler) turboTunnelUDPLikeMode(conn net.Conn, addr net.Addr,
wg.Add(2)
done := make(chan struct{})
connPaddable := packetpadding.NewPaddableConnection(
packetpadding.ConfirmsReadWriteCloserPreservesMessageBoundary(conn), packetpadding.New())
// The remainder of the WebSocket stream consists of packets, one packet
// per WebSocket message. We read them one by one and feed them into the
// QueuePacketConn on which kcp.ServeConn was set up, which eventually
@ -151,7 +155,7 @@ func (handler *httpHandler) turboTunnelUDPLikeMode(conn net.Conn, addr net.Addr,
defer close(done) // Signal the write loop to finish
var p [2048]byte
for {
n, err := conn.Read(p[:])
n, err := connPaddable.Read(p[:])
if err != nil {
log.Println(err)
return
@ -173,7 +177,7 @@ func (handler *httpHandler) turboTunnelUDPLikeMode(conn net.Conn, addr net.Addr,
if !ok {
return
}
_, err := conn.Write(p)
_, err := connPaddable.Write(p)
pconn.Restore(p)
if err != nil {
log.Println(err)