jackyyf
/
transparent-proxy
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Update to match latest go version.

This commit is contained in:
Yifu Yu 2024-06-27 02:20:09 +08:00
parent a55aed58cb
commit ffb93ccd7e
2 changed files with 58 additions and 18 deletions
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57
main.go
View File

@ -1,14 +1,24 @@
package main
import (
"go.megvii-inc.com/transparent-proxy/server"
"flag"
"fmt"
"net"
"git.eve.moe/jackyyf/transparent-proxy/server"
"io"
"net"
)
func main() {
proxy_listener, err := server.NewIPv4TransparentListener(":9091")
var port = flag.Int("port", 1080, "Listen port of the server")
func main() {
flag.Parse()
go IPv4Handler()
go IPv6Handler()
select {}
}
func IPv4Handler() {
proxy_listener, err := server.NewIPv4TransparentListener(fmt.Sprintf("0.0.0.0:%d", *port))
if err != nil {
panic(err)
}
@ -18,8 +28,24 @@ func main() {
fmt.Println("Accept Error: ", err.Error())
continue
}
fmt.Printf("Accepted connection: %s => %s\n", conn.TCPConn().RemoteAddr().String(), conn.RealAddr().String())
go handle(conn)
// fmt.Printf("Accepted connection: %s => %s\n", conn.TCPConn().RemoteAddr().String(), conn.RealAddr().String())
go handle4(conn)
}
}
func IPv6Handler() {
proxy_listener, err := server.NewIPv6TransparentListener(fmt.Sprintf("[::]:%d", *port))
if err != nil {
panic(err)
}
for {
conn, err := proxy_listener.Accept()
if err != nil {
fmt.Println("Accept Error: ", err.Error())
continue
}
// fmt.Printf("Accepted connection: %s => %s\n", conn.TCPConn().RemoteAddr().String(), conn.RealAddr().String())
go handle6(conn)
}
}
@ -36,7 +62,7 @@ func pipeThenClose(reader io.Reader, writer io.WriteCloser) {
}
}
if err == io.EOF {
fmt.Println("Reader reached EOF, closing.")
// fmt.Println("Reader reached EOF, closing.")
return
}
if err != nil {
@ -47,13 +73,26 @@ func pipeThenClose(reader io.Reader, writer io.WriteCloser) {
}
}
func handle(conn server.TransparentConnection) {
func handle4(conn server.TransparentConnection) {
rconn, err := net.DialTCP("tcp4", nil, conn.RealAddr())
if err != nil {
fmt.Println("Connect to ", conn.RealAddr().String(), " error: ", err.Error())
conn.TCPConn().Close()
return
}
// fmt.Printf("ESTABLISHED %s <=> %s\n", conn.TCPConn().RemoteAddr().String(), conn.RealAddr().String())
go pipeThenClose(conn.TCPConn(), rconn)
go pipeThenClose(rconn, conn.TCPConn())
}
}
func handle6(conn server.TransparentConnection) {
rconn, err := net.DialTCP("tcp6", conn.TCPConn().RemoteAddr().(*net.TCPAddr), conn.RealAddr())
if err != nil {
fmt.Println("Connect to ", conn.RealAddr().String(), " error: ", err.Error())
conn.TCPConn().Close()
return
}
// fmt.Printf("ESTABLISHED %s <=> %s\n", conn.TCPConn().RemoteAddr().String(), conn.RealAddr().String())
go pipeThenClose(conn.TCPConn(), rconn)
go pipeThenClose(rconn, conn.TCPConn())
}

19
server/hack_linux.go
View File

@ -9,9 +9,9 @@ package server
// WARZONE BEGINS HERE! MIND YOUR HEAD!
import (
"reflect"
"net"
"golang.org/x/sys/unix"
"net"
"reflect"
)
const (
@ -19,13 +19,14 @@ const (
)
func GetFDFromTCPConn(conn *net.TCPConn) int {
// Actual fd is stored at: (*(*TCPConn).conn.fd).sysfd
// Actual fd is stored at: (*(*TCPConn).conn.fd).pfd.Sysfd
v := reflect.ValueOf(*conn)
c := v.FieldByName("conn")
fdp := c.FieldByName("fd")
fd := reflect.Indirect(fdp)
sysfd := fd.FieldByName("sysfd")
return int(sysfd.Int())
pfd := fd.FieldByName("pfd")
Sysfd := pfd.FieldByName("Sysfd")
return int(Sysfd.Int())
}
func GetAddr4FromFD(fd int) *net.TCPAddr {
@ -41,9 +42,9 @@ func GetAddr4FromFD(fd int) *net.TCPAddr {
Flowinfo 4byte ipv4 address
Addr 16byte ignore for ipv4
Scope_id 4byte ignore for ipv4
*/
*/
addr.Flowinfo = be32toh(addr.Flowinfo)
a, b, c, d := byte(addr.Flowinfo >> 24), byte((addr.Flowinfo >> 16) & 255), byte((addr.Flowinfo >> 8) & 255), byte(addr.Flowinfo & 255)
a, b, c, d := byte(addr.Flowinfo>>24), byte((addr.Flowinfo>>16)&255), byte((addr.Flowinfo>>8)&255), byte(addr.Flowinfo&255)
ip := net.IPv4(a, b, c, d)
return &net.TCPAddr{IP: ip, Port: int(be16toh(addr.Port)), Zone: ""}
}
@ -61,9 +62,9 @@ func GetAddr6FromFD(fd int) *net.TCPAddr {
Flowinfo 4byte ipv6 flowinfo ignore
Addr 16byte ipv6 addr
Scope_id 4byte ipv6 scope id ignore
*/
*/
v6addr := make(net.IP, 16)
// Make GC happy?
copy(v6addr, addr.Addr[:])
return &net.TCPAddr{IP: v6addr, Port: int(be16toh(addr.Port)), Zone: ""}
}
}