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Feature: MITM rewrite

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This commit is contained in:
yaling888
2022-04-10 03:59:27 +08:00
parent 5a27ebd1b3
commit f036e06f6f
40 changed files with 2144 additions and 71 deletions
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15
dns/middleware.go
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@@ -21,7 +21,7 @@ type (
middleware func(next handler) handler
)
func withHosts(hosts *trie.DomainTrie[netip.Addr]) middleware {
func withHosts(hosts *trie.DomainTrie[netip.Addr], mapping *cache.LruCache[string, string]) middleware {
return func(next handler) handler {
return func(ctx *context.DNSContext, r *D.Msg) (*D.Msg, error) {
q := r.Question[0]
@@ -30,23 +30,28 @@ func withHosts(hosts *trie.DomainTrie[netip.Addr]) middleware {
return next(ctx, r)
}
record := hosts.Search(strings.TrimRight(q.Name, "."))
qName := strings.TrimRight(q.Name, ".")
record := hosts.Search(qName)
if record == nil {
return next(ctx, r)
}
ip := record.Data
if mapping != nil {
mapping.SetWithExpire(ip.Unmap().String(), qName, time.Now().Add(time.Second*5))
}
msg := r.Copy()
if ip.Is4() && q.Qtype == D.TypeA {
rr := &D.A{}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeA, Class: D.ClassINET, Ttl: 1}
rr.A = ip.AsSlice()
msg.Answer = []D.RR{rr}
} else if ip.Is6() && q.Qtype == D.TypeAAAA {
rr := &D.AAAA{}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeAAAA, Class: D.ClassINET, Ttl: dnsDefaultTTL}
rr.Hdr = D.RR_Header{Name: q.Name, Rrtype: D.TypeAAAA, Class: D.ClassINET, Ttl: 1}
rr.AAAA = ip.AsSlice()
msg.Answer = []D.RR{rr}
@@ -177,7 +182,7 @@ func NewHandler(resolver *Resolver, mapper *ResolverEnhancer) handler {
middlewares := []middleware{}
if resolver.hosts != nil {
middlewares = append(middlewares, withHosts(resolver.hosts))
middlewares = append(middlewares, withHosts(resolver.hosts, mapper.mapping))
}
if mapper.mode == C.DNSFakeIP {