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response.go
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response.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package msg_matcher
import (
"context"
"github.com/IrineSistiana/mosdns/dispatcher/handler"
"github.com/IrineSistiana/mosdns/dispatcher/pkg/matcher/domain"
"github.com/IrineSistiana/mosdns/dispatcher/pkg/matcher/elem"
"github.com/IrineSistiana/mosdns/dispatcher/pkg/matcher/netlist"
"github.com/miekg/dns"
"net"
)
type AAAAAIPMatcher struct {
ipMatcher netlist.Matcher
}
func NewAAAAAIPMatcher(ipMatcher netlist.Matcher) *AAAAAIPMatcher {
return &AAAAAIPMatcher{ipMatcher: ipMatcher}
}
func (m *AAAAAIPMatcher) Match(_ context.Context, qCtx *handler.Context) (matched bool, _ error) {
if qCtx.R() == nil {
return false, nil
}
for _, rr := range qCtx.R().Answer {
var ip net.IP
switch rr := rr.(type) {
case *dns.A:
ip = rr.A
case *dns.AAAA:
ip = rr.AAAA
default:
continue
}
if m.ipMatcher.Match(ip) {
return true, nil
}
}
return false, nil
}
type CNameMatcher struct {
domainMatcher domain.Matcher
}
func NewCNameMatcher(domainMatcher domain.Matcher) *CNameMatcher {
return &CNameMatcher{domainMatcher: domainMatcher}
}
func (m *CNameMatcher) Match(_ context.Context, qCtx *handler.Context) (matched bool, _ error) {
if qCtx.R() == nil {
return false, nil
}
for _, rr := range qCtx.R().Answer {
if cname, ok := rr.(*dns.CNAME); ok {
if _, ok := m.domainMatcher.Match(cname.Target); ok {
return true, nil
}
}
}
return false, nil
}
type RCodeMatcher struct {
elemMatcher *elem.IntMatcher
}
func NewRCodeMatcher(elemMatcher *elem.IntMatcher) *RCodeMatcher {
return &RCodeMatcher{elemMatcher: elemMatcher}
}
func (m *RCodeMatcher) Match(_ context.Context, qCtx *handler.Context) (matched bool, _ error) {
if qCtx.R() == nil {
return false, nil
}
if m.elemMatcher.Match(qCtx.R().Rcode) {
return true, nil
}
return false, nil
}