c/ooni-probe-cli
Watch
1
0
Fork
You've already forked ooni-probe-cli
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

feat(netxlite): implement DNSTransport wrapping (#776)

Browse source 
Acknowledge that transports MAY be used in isolation (i.e., outside
of a Resolver) and add support for wrapping.

Ensure that every factory that creates an unwrapped type is named
accordingly to hopefully ensure there are no surprises.

Implement DNSTransport wrapping and use a technique similar to the
one used by Dialer to customize the DNSTransport while constructing
more complex data types (e.g., a specific resolver).

Ensure that the stdlib resolver's own "getaddrinfo" transport (1)
is wrapped and (2) could be extended during construction.

This work is part of my ongoing effort to bring to this repository
websteps-illustrated changes relative to netxlite.

Ref issue: https://github.com/ooni/probe/issues/2096
This commit is contained in:
Simone Basso 2022-06-01 11:10:08 +02:00 • committed by GitHub
commit 8f7e3803eb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
20 changed files with 369 additions and 91 deletions
Download patch file Download diff file Expand all files Collapse all files

20
internal/netxlite/dnsovertcp_test.go
View file

@ -20,7 +20,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
t.Run("cannot encode query", func(t *testing.T) {
expected := errors.New("mocked error")
const address = "9.9.9.9:53"
txp := NewDNSOverTCPTransport(new(net.Dialer).DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(new(net.Dialer).DialContext, address)
query := &mocks.DNSQuery{
MockBytes: func() ([]byte, error) {
return nil, expected
@ -37,7 +37,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
t.Run("query too large", func(t *testing.T) {
const address = "9.9.9.9:53"
txp := NewDNSOverTCPTransport(new(net.Dialer).DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(new(net.Dialer).DialContext, address)
query := &mocks.DNSQuery{
MockBytes: func() ([]byte, error) {
return make([]byte, math.MaxUint16+1), nil
@ -65,7 +65,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
return nil, mocked
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
resp, err := txp.RoundTrip(context.Background(), query)
if !errors.Is(err, mocked) {
t.Fatal("not the error we expected")
@ -98,7 +98,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
}, nil
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
resp, err := txp.RoundTrip(context.Background(), query)
if !errors.Is(err, mocked) {
t.Fatal("not the error we expected")
@ -134,7 +134,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
}, nil
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
resp, err := txp.RoundTrip(context.Background(), query)
if !errors.Is(err, mocked) {
t.Fatal("not the error we expected")
@ -176,7 +176,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
}, nil
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
resp, err := txp.RoundTrip(context.Background(), query)
if !errors.Is(err, mocked) {
t.Fatal("not the error we expected")
@ -211,7 +211,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
}, nil
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
txp.decoder = &mocks.DNSDecoder{
MockDecodeResponse: func(data []byte, query model.DNSQuery) (model.DNSResponse, error) {
return nil, mocked
@ -250,7 +250,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
}, nil
},
}
txp := NewDNSOverTCPTransport(fakedialer.DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(fakedialer.DialContext, address)
expectedResp := &mocks.DNSResponse{}
txp.decoder = &mocks.DNSDecoder{
MockDecodeResponse: func(data []byte, query model.DNSQuery) (model.DNSResponse, error) {
@ -269,7 +269,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
t.Run("other functions okay with TCP", func(t *testing.T) {
const address = "9.9.9.9:53"
txp := NewDNSOverTCPTransport(new(net.Dialer).DialContext, address)
txp := NewUnwrappedDNSOverTCPTransport(new(net.Dialer).DialContext, address)
if txp.RequiresPadding() != false {
t.Fatal("invalid RequiresPadding")
}
@ -284,7 +284,7 @@ func TestDNSOverTCPTransport(t *testing.T) {
t.Run("other functions okay with TLS", func(t *testing.T) {
const address = "9.9.9.9:853"
txp := NewDNSOverTLSTransport((&tls.Dialer{}).DialContext, address)
txp := NewUnwrappedDNSOverTLSTransport((&tls.Dialer{}).DialContext, address)
if txp.RequiresPadding() != true {
t.Fatal("invalid RequiresPadding")
}