fa1c90a479
* Require Field for rewrite rules * review feedback changes * fix ut * fix typo, add warning message
31 lines
713 B
Go
31 lines
713 B
Go
// Package rewrite is middleware for rewriting requests internally to something different.
|
|
package rewrite
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// ClassRule is a class rewrite rule.
|
|
type ClassRule struct {
|
|
fromClass, toClass uint16
|
|
}
|
|
|
|
// Initializer
|
|
func (rule ClassRule) New(args ...string) Rule {
|
|
from, to := args[0], strings.Join(args[1:], " ")
|
|
return &ClassRule{dns.StringToClass[from], dns.StringToClass[to]}
|
|
|
|
}
|
|
|
|
// Rewrite rewrites the the current request.
|
|
func (rule ClassRule) Rewrite(r *dns.Msg) Result {
|
|
if rule.fromClass > 0 && rule.toClass > 0 {
|
|
if r.Question[0].Qclass == rule.fromClass {
|
|
r.Question[0].Qclass = rule.toClass
|
|
return RewriteDone
|
|
}
|
|
}
|
|
return RewriteIgnored
|
|
}
|