mirror of
https://github.com/bettercap/bettercap
synced 2025-07-05 20:42:09 -07:00
99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
package dns_proxy
|
|
|
|
import (
|
|
"github.com/bettercap/bettercap/v2/log"
|
|
"github.com/bettercap/bettercap/v2/session"
|
|
"github.com/evilsocket/islazy/plugin"
|
|
|
|
"github.com/miekg/dns"
|
|
|
|
"github.com/robertkrimen/otto"
|
|
)
|
|
|
|
type DnsProxyScript struct {
|
|
*plugin.Plugin
|
|
|
|
doOnRequest bool
|
|
doOnResponse bool
|
|
doOnCommand bool
|
|
}
|
|
|
|
func LoadDnsProxyScript(path string, sess *session.Session) (err error, s *DnsProxyScript) {
|
|
log.Debug("loading proxy script %s ...", path)
|
|
|
|
plug, err := plugin.Load(path)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// define session pointer
|
|
if err = plug.Set("env", sess.Env.Data); err != nil {
|
|
log.Error("Error while defining environment: %+v", err)
|
|
return
|
|
}
|
|
|
|
// run onLoad if defined
|
|
if plug.HasFunc("onLoad") {
|
|
if _, err = plug.Call("onLoad"); err != nil {
|
|
log.Error("Error while executing onLoad callback: %s", "\nTraceback:\n "+err.(*otto.Error).String())
|
|
return
|
|
}
|
|
}
|
|
|
|
s = &DnsProxyScript{
|
|
Plugin: plug,
|
|
doOnRequest: plug.HasFunc("onRequest"),
|
|
doOnResponse: plug.HasFunc("onResponse"),
|
|
doOnCommand: plug.HasFunc("onCommand"),
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *DnsProxyScript) OnRequest(req *dns.Msg, clientIP string) (jsreq, jsres *JSQuery) {
|
|
if s.doOnRequest {
|
|
jsreq := NewJSQuery(req, clientIP)
|
|
jsres := NewJSQuery(req, clientIP)
|
|
|
|
if _, err := s.Call("onRequest", jsreq, jsres); err != nil {
|
|
log.Error("%s", err)
|
|
return nil, nil
|
|
} else if jsreq.WasModified() {
|
|
jsreq.UpdateHash()
|
|
return jsreq, nil
|
|
} else if jsres.WasModified() {
|
|
jsres.UpdateHash()
|
|
return nil, jsres
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (s *DnsProxyScript) OnResponse(req, res *dns.Msg, clientIP string) (jsreq, jsres *JSQuery) {
|
|
if s.doOnResponse {
|
|
jsreq := NewJSQuery(req, clientIP)
|
|
jsres := NewJSQuery(res, clientIP)
|
|
|
|
if _, err := s.Call("onResponse", jsreq, jsres); err != nil {
|
|
log.Error("%s", err)
|
|
return nil, nil
|
|
} else if jsres.WasModified() {
|
|
jsres.UpdateHash()
|
|
return nil, jsres
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (s *DnsProxyScript) OnCommand(cmd string) bool {
|
|
if s.doOnCommand {
|
|
if ret, err := s.Call("onCommand", cmd); err != nil {
|
|
log.Error("Error while executing onCommand callback: %+v", err)
|
|
return false
|
|
} else if v, ok := ret.(bool); ok {
|
|
return v
|
|
}
|
|
}
|
|
return false
|
|
}
|