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cleanup: remove the original netx implementation (#653)

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This commit completely removes the original netx implementation,
which was only used by `tor`, since this has changed in
https://github.com/ooni/probe-cli/pull/652.

The original netx implementation was my first attempt at performing
network measurements using Go. It started its life inside of the
https://github.com/ooni/netx repository. It was later merged into
the https://github.com/ooni/probe-engine repository. It finally
ended up into this repository when we merged probe-engine with it.

The main issue with the original implementation is that it was
a bit too complex and used channels where they were probably not
necessary. Because of that, later I introduced a second netx
implementation, which currently lives in ./internal/engine/netx.

The current netx implementation, the third one, lives in the
./internal/netxlite package. We are currently working to replace
the second implementation with the third one, but this is happening
at a slow pace. Also, the second implementation does not have big
maintenance concerns but it's just a bit too bureaucratic to use
since it involves creating lots of `Config` structures.

The reference issue is probably https://github.com/ooni/probe/issues/1688,
since this diff has been enabled by rewriting Tor to use `measurex`
(a library living on top of `netxlite`).
This commit is contained in:
Simone Basso
2022-01-05 19:00:50 +01:00
committed by GitHub
parent dfa5e708fe
commit 60a3c372f5
32 changed files with 0 additions and 6290 deletions
Download Patch File Download Diff File Expand all files Collapse all files
internal/engine/netx/resolver/emitter.go
-79
View File
@@ -1,79 +0,0 @@
package resolver
import (
"context"
"time"
"github.com/ooni/probe-cli/v3/internal/engine/legacy/netx/modelx"
)
// EmitterTransport is a RoundTripper that emits events when they occur.
type EmitterTransport struct {
RoundTripper
}
// RoundTrip implements RoundTripper.RoundTrip
func (txp EmitterTransport) RoundTrip(ctx context.Context, querydata []byte) ([]byte, error) {
root := modelx.ContextMeasurementRootOrDefault(ctx)
root.Handler.OnMeasurement(modelx.Measurement{
DNSQuery: &modelx.DNSQueryEvent{
Data: querydata,
DurationSinceBeginning: time.Since(root.Beginning),
},
})
replydata, err := txp.RoundTripper.RoundTrip(ctx, querydata)
if err != nil {
return nil, err
}
root.Handler.OnMeasurement(modelx.Measurement{
DNSReply: &modelx.DNSReplyEvent{
Data: replydata,
DurationSinceBeginning: time.Since(root.Beginning),
},
})
return replydata, nil
}
// EmitterResolver is a resolver that emits events
type EmitterResolver struct {
Resolver
}
// LookupHost returns the IP addresses of a host
func (r EmitterResolver) LookupHost(ctx context.Context, hostname string) ([]string, error) {
var (
network string
address string
)
type queryableResolver interface {
Transport() RoundTripper
}
if qr, ok := r.Resolver.(queryableResolver); ok {
txp := qr.Transport()
network, address = txp.Network(), txp.Address()
}
root := modelx.ContextMeasurementRootOrDefault(ctx)
root.Handler.OnMeasurement(modelx.Measurement{
ResolveStart: &modelx.ResolveStartEvent{
DurationSinceBeginning: time.Since(root.Beginning),
Hostname: hostname,
TransportAddress: address,
TransportNetwork: network,
},
})
addrs, err := r.Resolver.LookupHost(ctx, hostname)
root.Handler.OnMeasurement(modelx.Measurement{
ResolveDone: &modelx.ResolveDoneEvent{
Addresses: addrs,
DurationSinceBeginning: time.Since(root.Beginning),
Error: err,
Hostname: hostname,
TransportAddress: address,
TransportNetwork: network,
},
})
return addrs, err
}
var _ RoundTripper = EmitterTransport{}
var _ Resolver = EmitterResolver{}
internal/engine/netx/resolver/emitter_test.go
-194
View File
@@ -1,194 +0,0 @@
package resolver_test
import (
"bytes"
"context"
"errors"
"io"
"net/http"
"testing"
"time"
"github.com/miekg/dns"
"github.com/ooni/probe-cli/v3/internal/engine/legacy/netx/handlers"
"github.com/ooni/probe-cli/v3/internal/engine/legacy/netx/modelx"
"github.com/ooni/probe-cli/v3/internal/engine/netx/resolver"
"github.com/ooni/probe-cli/v3/internal/model/mocks"
)
func TestEmitterTransportSuccess(t *testing.T) {
ctx := context.Background()
handler := &handlers.SavingHandler{}
root := &modelx.MeasurementRoot{
Beginning: time.Now(),
Handler: handler,
}
ctx = modelx.WithMeasurementRoot(ctx, root)
txp := resolver.EmitterTransport{RoundTripper: resolver.FakeTransport{
Data: resolver.GenReplySuccess(t, dns.TypeA, "8.8.8.8"),
}}
e := resolver.MiekgEncoder{}
querydata, err := e.Encode("www.google.com", dns.TypeAAAA, true)
if err != nil {
t.Fatal(err)
}
replydata, err := txp.RoundTrip(ctx, querydata)
if err != nil {
t.Fatal(err)
}
events := handler.Read()
if len(events) != 2 {
t.Fatal("unexpected number of events")
}
if events[0].DNSQuery == nil {
t.Fatal("missing DNSQuery field")
}
if !bytes.Equal(events[0].DNSQuery.Data, querydata) {
t.Fatal("invalid query data")
}
if events[0].DNSQuery.DurationSinceBeginning <= 0 {
t.Fatal("invalid duration since beginning")
}
if events[1].DNSReply == nil {
t.Fatal("missing DNSReply field")
}
if !bytes.Equal(events[1].DNSReply.Data, replydata) {
t.Fatal("missing reply data")
}
if events[1].DNSReply.DurationSinceBeginning <= 0 {
t.Fatal("invalid duration since beginning")
}
}
func TestEmitterTransportFailure(t *testing.T) {
ctx := context.Background()
handler := &handlers.SavingHandler{}
root := &modelx.MeasurementRoot{
Beginning: time.Now(),
Handler: handler,
}
ctx = modelx.WithMeasurementRoot(ctx, root)
mocked := errors.New("mocked error")
txp := resolver.EmitterTransport{RoundTripper: resolver.FakeTransport{
Err: mocked,
}}
e := resolver.MiekgEncoder{}
querydata, err := e.Encode("www.google.com", dns.TypeAAAA, true)
if err != nil {
t.Fatal(err)
}
replydata, err := txp.RoundTrip(ctx, querydata)
if !errors.Is(err, mocked) {
t.Fatal("not the error we expected")
}
if replydata != nil {
t.Fatal("expected nil replydata")
}
events := handler.Read()
if len(events) != 1 {
t.Fatal("unexpected number of events")
}
if events[0].DNSQuery == nil {
t.Fatal("missing DNSQuery field")
}
if !bytes.Equal(events[0].DNSQuery.Data, querydata) {
t.Fatal("invalid query data")
}
if events[0].DNSQuery.DurationSinceBeginning <= 0 {
t.Fatal("invalid duration since beginning")
}
}
func TestEmitterResolverFailure(t *testing.T) {
ctx := context.Background()
handler := &handlers.SavingHandler{}
root := &modelx.MeasurementRoot{
Beginning: time.Now(),
Handler: handler,
}
ctx = modelx.WithMeasurementRoot(ctx, root)
r := resolver.EmitterResolver{Resolver: resolver.NewSerialResolver(
&resolver.DNSOverHTTPS{
Client: &mocks.HTTPClient{
MockDo: func(req *http.Request) (*http.Response, error) {
return nil, io.EOF
},
},
URL: "https://dns.google.com/",
},
)}
replies, err := r.LookupHost(ctx, "www.google.com")
if !errors.Is(err, io.EOF) {
t.Fatal("not the error we expected")
}
if replies != nil {
t.Fatal("expected nil replies")
}
events := handler.Read()
if len(events) != 2 {
t.Fatal("unexpected number of events")
}
if events[0].ResolveStart == nil {
t.Fatal("missing ResolveStart field")
}
if events[0].ResolveStart.DurationSinceBeginning <= 0 {
t.Fatal("invalid duration since beginning")
}
if events[0].ResolveStart.Hostname != "www.google.com" {
t.Fatal("invalid Hostname")
}
if events[0].ResolveStart.TransportAddress != "https://dns.google.com/" {
t.Fatal("invalid TransportAddress")
}
if events[0].ResolveStart.TransportNetwork != "doh" {
t.Fatal("invalid TransportNetwork")
}
if events[1].ResolveDone == nil {
t.Fatal("missing ResolveDone field")
}
if events[1].ResolveDone.DurationSinceBeginning <= 0 {
t.Fatal("invalid duration since beginning")
}
if events[1].ResolveDone.Error != io.EOF {
t.Fatal("invalid Error")
}
if events[1].ResolveDone.Hostname != "www.google.com" {
t.Fatal("invalid Hostname")
}
if events[1].ResolveDone.TransportAddress != "https://dns.google.com/" {
t.Fatal("invalid TransportAddress")
}
if events[1].ResolveDone.TransportNetwork != "doh" {
t.Fatal("invalid TransportNetwork")
}
}
func TestEmitterResolverSuccess(t *testing.T) {
ctx := context.Background()
handler := &handlers.SavingHandler{}
root := &modelx.MeasurementRoot{
Beginning: time.Now(),
Handler: handler,
}
ctx = modelx.WithMeasurementRoot(ctx, root)
r := resolver.EmitterResolver{Resolver: resolver.NewFakeResolverWithResult(
[]string{"8.8.8.8"},
)}
replies, err := r.LookupHost(ctx, "dns.google.com")
if err != nil {
t.Fatal(err)
}
if len(replies) != 1 {
t.Fatal("expected a single replies")
}
events := handler.Read()
if len(events) != 2 {
t.Fatal("unexpected number of events")
}
if events[1].ResolveDone == nil {
t.Fatal("missing ResolveDone field")
}
if events[1].ResolveDone.Addresses[0] != "8.8.8.8" {
t.Fatal("invalid Addresses")
}
}