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package lib
import (
"bytes"
"fmt"
"io/ioutil"
"net"
"net/http"
"testing"
"git.torproject.org/pluggable-transports/snowflake.git/common/util"
. "github.com/smartystreets/goconvey/convey"
)
type MockTransport struct {
statusOverride int
body []byte
}
// Just returns a response with fake SDP answer.
func (m *MockTransport) RoundTrip(req *http.Request) (*http.Response, error) {
s := ioutil.NopCloser(bytes.NewReader(m.body))
r := &http.Response{
StatusCode: m.statusOverride,
Body: s,
}
return r, nil
}
type FakeDialer struct {
max int
}
func (w FakeDialer) Catch() (*WebRTCPeer, error) {
fmt.Println("Caught a dummy snowflake.")
return &WebRTCPeer{}, nil
}
func (w FakeDialer) GetMax() int {
return w.max
}
type FakeSocksConn struct {
net.Conn
rejected bool
}
func (f FakeSocksConn) Reject() error {
f.rejected = true
return nil
}
func (f FakeSocksConn) Grant(addr *net.TCPAddr) error { return nil }
type FakePeers struct{ toRelease *WebRTCPeer }
func (f FakePeers) Collect() (*WebRTCPeer, error) { return &WebRTCPeer{}, nil }
func (f FakePeers) Pop() *WebRTCPeer { return nil }
func (f FakePeers) Melted() <-chan struct{} { return nil }
func TestSnowflakeClient(t *testing.T) {
Convey("Peers", t, func() {
Convey("Can construct", func() {
d := &FakeDialer{max: 1}
p, _ := NewPeers(d)
So(p.Tongue.GetMax(), ShouldEqual, 1)
So(p.snowflakeChan, ShouldNotBeNil)
So(cap(p.snowflakeChan), ShouldEqual, 1)
})
Convey("Collecting a Snowflake requires a Tongue.", func() {
p, err := NewPeers(nil)
So(err, ShouldNotBeNil)
// Set the dialer so that collection is possible.
d := &FakeDialer{max: 1}
p, err = NewPeers(d)
_, err = p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, 1)
// S
_, err = p.Collect()
})
Convey("Collection continues until capacity.", func() {
c := 5
p, _ := NewPeers(FakeDialer{max: c})
// Fill up to capacity.
for i := 0; i < c; i++ {
fmt.Println("Adding snowflake ", i)
_, err := p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, i+1)
}
// But adding another gives an error.
So(p.Count(), ShouldEqual, c)
_, err := p.Collect()
So(err, ShouldNotBeNil)
So(p.Count(), ShouldEqual, c)
// But popping and closing allows it to continue.
s := p.Pop()
s.Close()
So(s, ShouldNotBeNil)
So(p.Count(), ShouldEqual, c-1)
_, err = p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, c)
})
Convey("Count correctly purges peers marked for deletion.", func() {
p, _ := NewPeers(FakeDialer{max: 5})
p.Collect()
p.Collect()
p.Collect()
p.Collect()
So(p.Count(), ShouldEqual, 4)
s := p.Pop()
s.Close()
So(p.Count(), ShouldEqual, 3)
s = p.Pop()
s.Close()
So(p.Count(), ShouldEqual, 2)
})
Convey("End Closes all peers.", func() {
cnt := 5
p, _ := NewPeers(FakeDialer{max: cnt})
for i := 0; i < cnt; i++ {
p.activePeers.PushBack(&WebRTCPeer{})
}
So(p.Count(), ShouldEqual, cnt)
p.End()
<-p.Melted()
So(p.Count(), ShouldEqual, 0)
})
Convey("Pop skips over closed peers.", func() {
p, _ := NewPeers(FakeDialer{max: 4})
wc1, _ := p.Collect()
wc2, _ := p.Collect()
wc3, _ := p.Collect()
So(wc1, ShouldNotBeNil)
So(wc2, ShouldNotBeNil)
So(wc3, ShouldNotBeNil)
wc1.Close()
r := p.Pop()
So(p.Count(), ShouldEqual, 2)
So(r, ShouldEqual, wc2)
wc4, _ := p.Collect()
wc2.Close()
wc3.Close()
r = p.Pop()
So(r, ShouldEqual, wc4)
})
})
Convey("Snowflake", t, func() {
SkipConvey("Handler Grants correctly", func() {
socks := &FakeSocksConn{}
broker := &BrokerChannel{Host: "test"}
d := NewWebRTCDialer(broker, nil, 1)
So(socks.rejected, ShouldEqual, false)
Handler(socks, d)
So(socks.rejected, ShouldEqual, true)
})
})
Convey("Dialers", t, func() {
Convey("Can construct WebRTCDialer.", func() {
broker := &BrokerChannel{Host: "test"}
d := NewWebRTCDialer(broker, nil, 1)
So(d, ShouldNotBeNil)
So(d.BrokerChannel, ShouldNotBeNil)
So(d.BrokerChannel.Host, ShouldEqual, "test")
})
SkipConvey("WebRTCDialer can Catch a snowflake.", func() {
broker := &BrokerChannel{Host: "test"}
d := NewWebRTCDialer(broker, nil, 1)
conn, err := d.Catch()
So(conn, ShouldBeNil)
So(err, ShouldNotBeNil)
})
})
Convey("Rendezvous", t, func() {
transport := &MockTransport{
http.StatusOK,
[]byte(`{"type":"answer","sdp":"fake"}`),
}
fakeOffer, err := util.DeserializeSessionDescription(`{"type":"offer","sdp":"test"}`)
if err != nil {
panic(err)
}
Convey("Construct BrokerChannel with no front domain", func() {
b, err := NewBrokerChannel("test.broker", "", transport, false)
So(b.url, ShouldNotBeNil)
So(err, ShouldBeNil)
So(b.url.Path, ShouldResemble, "test.broker")
So(b.transport, ShouldNotBeNil)
})
Convey("Construct BrokerChannel *with* front domain", func() {
b, err := NewBrokerChannel("test.broker", "front", transport, false)
So(b.url, ShouldNotBeNil)
So(err, ShouldBeNil)
So(b.url.Path, ShouldResemble, "test.broker")
So(b.url.Host, ShouldResemble, "front")
So(b.transport, ShouldNotBeNil)
})
Convey("BrokerChannel.Negotiate responds with answer", func() {
b, err := NewBrokerChannel("test.broker", "", transport, false)
So(err, ShouldBeNil)
answer, err := b.Negotiate(fakeOffer)
So(err, ShouldBeNil)
So(answer, ShouldNotBeNil)
So(answer.SDP, ShouldResemble, "fake")
})
Convey("BrokerChannel.Negotiate fails with 503", func() {
b, err := NewBrokerChannel("test.broker", "",
&MockTransport{http.StatusServiceUnavailable, []byte("\n")},
false)
So(err, ShouldBeNil)
answer, err := b.Negotiate(fakeOffer)
So(err, ShouldNotBeNil)
So(answer, ShouldBeNil)
So(err.Error(), ShouldResemble, BrokerError503)
})
Convey("BrokerChannel.Negotiate fails with 400", func() {
b, err := NewBrokerChannel("test.broker", "",
&MockTransport{http.StatusBadRequest, []byte("\n")},
false)
So(err, ShouldBeNil)
answer, err := b.Negotiate(fakeOffer)
So(err, ShouldNotBeNil)
So(answer, ShouldBeNil)
So(err.Error(), ShouldResemble, BrokerError400)
})
Convey("BrokerChannel.Negotiate fails with large read", func() {
b, err := NewBrokerChannel("test.broker", "",
&MockTransport{http.StatusOK, make([]byte, 100001, 100001)},
false)
So(err, ShouldBeNil)
answer, err := b.Negotiate(fakeOffer)
So(err, ShouldNotBeNil)
So(answer, ShouldBeNil)
So(err.Error(), ShouldResemble, "unexpected EOF")
})
Convey("BrokerChannel.Negotiate fails with unexpected error", func() {
b, err := NewBrokerChannel("test.broker", "",
&MockTransport{123, []byte("")}, false)
So(err, ShouldBeNil)
answer, err := b.Negotiate(fakeOffer)
So(err, ShouldNotBeNil)
So(answer, ShouldBeNil)
So(err.Error(), ShouldResemble, BrokerErrorUnexpected)
})
})
}
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