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This commit is contained in:
jerry901 2021-12-27 17:29:17 +09:00
parent f43fe9e156
commit cfe7ca2118
4 changed files with 92 additions and 84 deletions
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74
handler/handler.go
View File

@ -1,74 +0,0 @@
package handler
import (
"fmt"
"io/ioutil"
"log"
"net"
"SpoofDPI/util"
"github.com/babolivier/go-doh-client"
)
var resolver = doh.Resolver{
Host: "8.8.8.8",
Class: doh.IN,
}
func HandleClientRequest(clientConn net.Conn) {
defer clientConn.Close()
buf, err := util.ReadBytes(clientConn)
if err != nil {
return
}
fmt.Println("\n##### Request from client : ")
fmt.Println(string(buf))
domain, port := util.ExtractDomainAndPort(string(buf))
log.Println("domain: "+ domain)
log.Println("port: " + port)
ip, err := util.DnsLookupOverHttps(domain) // Dns lookup over https
if err != nil {
log.Fatal(err)
return
}
remoteConn, err := net.Dial("tcp", ip+":"+port) // create connection to server
if err != nil {
fmt.Println(err)
return
}
defer remoteConn.Close()
DoMitm(clientConn, remoteConn, buf)
}
func DoMitm(clientConn net.Conn, remoteConn net.Conn, data []byte) {
_, write_err := remoteConn.Write(data)
if write_err != nil {
fmt.Println("failed:", write_err)
return
}
defer remoteConn.(*net.TCPConn).CloseWrite()
buf, read_err := ioutil.ReadAll(remoteConn)
if read_err != nil {
fmt.Println("failed:", read_err)
return
}
log.Println("\n##### Response from server: ")
log.Println(string(buf))
_, write_err = clientConn.Write(buf)
if write_err != nil {
fmt.Println("failed:", write_err)
return
}
defer clientConn.(*net.TCPConn).CloseWrite()
}

38
mitm/mitm.go Normal file
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@ -0,0 +1,38 @@
package mitm
import (
"net"
"log"
"io/ioutil"
"fmt"
)
func GoGoSing(clientConn net.Conn, remoteConn net.Conn, data []byte) {
_, write_err := remoteConn.Write(data)
if write_err != nil {
log.Fatal("failed:", write_err)
return
}
defer remoteConn.(*net.TCPConn).CloseWrite()
// Read from the server
buf, read_err := ioutil.ReadAll(remoteConn)
if read_err != nil {
log.Fatal("failed:", read_err)
return
}
fmt.Println()
log.Println()
fmt.Println("##### Response from the server: ")
fmt.Println(string(buf))
// Write to client
_, write_err = clientConn.Write(buf)
if write_err != nil {
log.Fatal("failed:", write_err)
return
}
defer clientConn.(*net.TCPConn).CloseWrite()
}

58
spoof-dpi.go
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@ -1,28 +1,72 @@
package main
import (
"net"
"SpoofDPI/mitm"
"SpoofDPI/util"
"fmt"
"log"
"SpoofDPI/handler"
"net"
)
const (
CLI_PORT = "8080"
DNS_ADDR = "1.1.1.1"
)
type config struct {
port string
age int
}
func main() {
log.Println("##### Listening 8080..")
listener, err := net.Listen("tcp", ":8080")
listener, err := net.Listen("tcp", ":" + CLI_PORT)
if err != nil {
panic(err)
}
for {
connClient, err := listener.Accept()
clientConn, err := listener.Accept()
if err != nil {
log.Println("error accepting connection", err)
continue
}
log.Println("##### New connection", connClient.RemoteAddr())
log.Println("##### New connection", clientConn.RemoteAddr())
go handler.HandleClientRequest(connClient)
}
go func() {
defer clientConn.Close()
buf, err := util.ReadBytes(clientConn)
if err != nil {
return
}
fmt.Println()
log.Println()
fmt.Println("##### Request from client : ")
fmt.Println(string(buf))
domain, port := util.ExtractDomainAndPort(string(buf))
log.Println("domain: "+ domain)
log.Println("port: " + port)
ip, err := util.DnsLookupOverHttps(DNS_ADDR, domain) // Dns lookup over https
if err != nil {
log.Fatal(err)
return
}
remoteConn, err := net.Dial("tcp", ip+":"+port) // create connection to server
if err != nil {
log.Fatal(err)
return
}
defer remoteConn.Close()
mitm.GoGoSing(clientConn, remoteConn, buf)
}()
}
}

4
util/util.go
View File

@ -41,10 +41,10 @@ func ReadBytes(conn net.Conn)([]byte, error) {
return buf, nil
}
func DnsLookupOverHttps(domain string)(string, error) {
func DnsLookupOverHttps(addr string, domain string)(string, error) {
// Perform a A lookup on example.com
resolver := doh.Resolver{
Host: "8.8.8.8", // Change this with your favourite DoH-compliant resolver.
Host: addr, // Change this with your favourite DoH-compliant resolver.
Class: doh.IN,
}