From 003176f069f70117584a5f378cbfffb8637e0133 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Wed, 10 Apr 2024 20:27:43 +0800
Subject: [PATCH] Remove unused fakeip packet conn

---
 transport/fakeip/packet.go      | 55 ---------------------------------
 transport/fakeip/packet_wait.go | 37 ----------------------
 2 files changed, 92 deletions(-)
 delete mode 100644 transport/fakeip/packet.go
 delete mode 100644 transport/fakeip/packet_wait.go

diff --git a/transport/fakeip/packet.go b/transport/fakeip/packet.go
deleted file mode 100644
index 620acb92..00000000
--- a/transport/fakeip/packet.go
+++ /dev/null
@@ -1,55 +0,0 @@
-package fakeip
-
-import (
-	"github.com/sagernet/sing/common/buf"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-var _ N.PacketConn = (*NATPacketConn)(nil)
-
-type NATPacketConn struct {
-	N.PacketConn
-	origin      M.Socksaddr
-	destination M.Socksaddr
-}
-
-func NewNATPacketConn(conn N.PacketConn, origin M.Socksaddr, destination M.Socksaddr) *NATPacketConn {
-	return &NATPacketConn{
-		PacketConn:  conn,
-		origin:      socksaddrWithoutPort(origin),
-		destination: socksaddrWithoutPort(destination),
-	}
-}
-
-func (c *NATPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
-	destination, err = c.PacketConn.ReadPacket(buffer)
-	if socksaddrWithoutPort(destination) == c.origin {
-		destination = M.Socksaddr{
-			Addr: c.destination.Addr,
-			Fqdn: c.destination.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return
-}
-
-func (c *NATPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	if socksaddrWithoutPort(destination) == c.destination {
-		destination = M.Socksaddr{
-			Addr: c.origin.Addr,
-			Fqdn: c.origin.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return c.PacketConn.WritePacket(buffer, destination)
-}
-
-func (c *NATPacketConn) Upstream() any {
-	return c.PacketConn
-}
-
-func socksaddrWithoutPort(destination M.Socksaddr) M.Socksaddr {
-	destination.Port = 0
-	return destination
-}
diff --git a/transport/fakeip/packet_wait.go b/transport/fakeip/packet_wait.go
deleted file mode 100644
index 9fa4a5bd..00000000
--- a/transport/fakeip/packet_wait.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package fakeip
-
-import (
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-func (c *NATPacketConn) CreatePacketReadWaiter() (N.PacketReadWaiter, bool) {
-	waiter, created := bufio.CreatePacketReadWaiter(c.PacketConn)
-	if !created {
-		return nil, false
-	}
-	return &waitNATPacketConn{c, waiter}, true
-}
-
-type waitNATPacketConn struct {
-	*NATPacketConn
-	readWaiter N.PacketReadWaiter
-}
-
-func (c *waitNATPacketConn) InitializeReadWaiter(options N.ReadWaitOptions) (needCopy bool) {
-	return c.readWaiter.InitializeReadWaiter(options)
-}
-
-func (c *waitNATPacketConn) WaitReadPacket() (buffer *buf.Buffer, destination M.Socksaddr, err error) {
-	buffer, destination, err = c.readWaiter.WaitReadPacket()
-	if err == nil && socksaddrWithoutPort(destination) == c.origin {
-		destination = M.Socksaddr{
-			Addr: c.destination.Addr,
-			Fqdn: c.destination.Fqdn,
-			Port: destination.Port,
-		}
-	}
-	return
-}