mirror of https://github.com/0xERR0R/blocky.git
127 lines
2.7 KiB
Go
127 lines
2.7 KiB
Go
package resolver
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import (
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"io/ioutil"
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"net"
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"net/http"
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"net/http/httptest"
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"strconv"
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"strings"
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"github.com/0xERR0R/blocky/config"
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"github.com/0xERR0R/blocky/util"
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"github.com/miekg/dns"
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"github.com/stretchr/testify/mock"
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)
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type resolverMock struct {
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mock.Mock
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NextResolver
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}
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func (r *resolverMock) Configuration() (result []string) {
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return
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}
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func (r *resolverMock) Resolve(req *Request) (*Response, error) {
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args := r.Called(req)
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resp, ok := args.Get(0).(*Response)
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if ok {
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return resp, args.Error((1))
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}
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return nil, args.Error(1)
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}
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// TestDOHUpstream creates a mock DoH Upstream
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func TestDOHUpstream(fn func(request *dns.Msg) (response *dns.Msg),
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reqFn ...func(w http.ResponseWriter)) config.Upstream {
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server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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body, err := ioutil.ReadAll(r.Body)
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util.FatalOnError("can't read request: ", err)
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msg := new(dns.Msg)
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err = msg.Unpack(body)
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util.FatalOnError("can't deserialize message: ", err)
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response := fn(msg)
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response.SetReply(msg)
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b, err := response.Pack()
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util.FatalOnError("can't serialize message: ", err)
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w.Header().Set("content-type", "application/dns-message")
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for _, f := range reqFn {
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if f != nil {
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f(w)
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}
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}
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_, err = w.Write(b)
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util.FatalOnError("can't write response: ", err)
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}))
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upstream, err := config.ParseUpstream(server.URL)
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util.FatalOnError("can't resolve address: ", err)
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return upstream
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}
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// TestUDPUpstream creates a mock UDP upstream
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//nolint:funlen
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func TestUDPUpstream(fn func(request *dns.Msg) (response *dns.Msg)) config.Upstream {
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a, err := net.ResolveUDPAddr("udp4", ":0")
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util.FatalOnError("can't resolve address: ", err)
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ln, err := net.ListenUDP("udp4", a)
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util.FatalOnError("can't create connection: ", err)
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ladr := ln.LocalAddr().String()
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host := strings.Split(ladr, ":")[0]
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p, err := strconv.ParseUint(strings.Split(ladr, ":")[1], 10, 16)
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util.FatalOnError("can't convert port: ", err)
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port := uint16(p)
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go func() {
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for {
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buffer := make([]byte, 1024)
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n, addr, err := ln.ReadFromUDP(buffer)
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util.FatalOnError("error on reading from udp: ", err)
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msg := new(dns.Msg)
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err = msg.Unpack(buffer[0 : n-1])
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util.FatalOnError("can't deserialize message: ", err)
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response := fn(msg)
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// nil should indicate an error
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if response == nil {
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_, _ = ln.WriteToUDP([]byte("dummy"), addr)
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continue
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}
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rCode := response.Rcode
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response.SetReply(msg)
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if rCode != 0 {
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response.Rcode = rCode
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}
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b, err := response.Pack()
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util.FatalOnError("can't serialize message: ", err)
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_, err = ln.WriteToUDP(b, addr)
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util.FatalOnError("can't write to UDP: ", err)
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}
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}()
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return config.Upstream{Net: "tcp+udp", Host: host, Port: port}
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}
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