1 /*
2 * libjingle
3 * Copyright 2012 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <string>
29
30 #include "talk/app/webrtc/jsepicecandidate.h"
31 #include "talk/app/webrtc/jsepsessiondescription.h"
32 #include "webrtc/p2p/base/candidate.h"
33 #include "webrtc/p2p/base/constants.h"
34 #include "webrtc/p2p/base/sessiondescription.h"
35 #include "talk/session/media/mediasession.h"
36 #include "webrtc/base/gunit.h"
37 #include "webrtc/base/helpers.h"
38 #include "webrtc/base/scoped_ptr.h"
39 #include "webrtc/base/ssladapter.h"
40 #include "webrtc/base/stringencode.h"
41
42 using webrtc::IceCandidateCollection;
43 using webrtc::IceCandidateInterface;
44 using webrtc::JsepIceCandidate;
45 using webrtc::JsepSessionDescription;
46 using webrtc::SessionDescriptionInterface;
47 using rtc::scoped_ptr;
48
49 static const char kCandidateUfrag[] = "ufrag";
50 static const char kCandidatePwd[] = "pwd";
51 static const char kCandidateUfragVoice[] = "ufrag_voice";
52 static const char kCandidatePwdVoice[] = "pwd_voice";
53 static const char kCandidateUfragVideo[] = "ufrag_video";
54 static const char kCandidatePwdVideo[] = "pwd_video";
55
56 // This creates a session description with both audio and video media contents.
57 // In SDP this is described by two m lines, one audio and one video.
CreateCricketSessionDescription()58 static cricket::SessionDescription* CreateCricketSessionDescription() {
59 cricket::SessionDescription* desc(new cricket::SessionDescription());
60 // AudioContentDescription
61 scoped_ptr<cricket::AudioContentDescription> audio(
62 new cricket::AudioContentDescription());
63
64 // VideoContentDescription
65 scoped_ptr<cricket::VideoContentDescription> video(
66 new cricket::VideoContentDescription());
67
68 audio->AddCodec(cricket::AudioCodec(103, "ISAC", 16000, 0, 0, 0));
69 desc->AddContent(cricket::CN_AUDIO, cricket::NS_JINGLE_RTP,
70 audio.release());
71
72 video->AddCodec(cricket::VideoCodec(120, "VP8", 640, 480, 30, 0));
73 desc->AddContent(cricket::CN_VIDEO, cricket::NS_JINGLE_RTP,
74 video.release());
75
76 EXPECT_TRUE(desc->AddTransportInfo(
77 cricket::TransportInfo(
78 cricket::CN_AUDIO,
79 cricket::TransportDescription(
80 std::vector<std::string>(),
81 kCandidateUfragVoice, kCandidatePwdVoice,
82 cricket::ICEMODE_FULL,
83 cricket::CONNECTIONROLE_NONE,
84 NULL, cricket::Candidates()))));
85 EXPECT_TRUE(desc->AddTransportInfo(
86 cricket::TransportInfo(cricket::CN_VIDEO,
87 cricket::TransportDescription(
88 std::vector<std::string>(),
89 kCandidateUfragVideo, kCandidatePwdVideo,
90 cricket::ICEMODE_FULL,
91 cricket::CONNECTIONROLE_NONE,
92 NULL, cricket::Candidates()))));
93 return desc;
94 }
95
96 class JsepSessionDescriptionTest : public testing::Test {
97 protected:
SetUp()98 virtual void SetUp() {
99 int port = 1234;
100 rtc::SocketAddress address("127.0.0.1", port++);
101 cricket::Candidate candidate(cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
102 address, 1, "", "", "local", 0, "1");
103 candidate_ = candidate;
104 const std::string session_id =
105 rtc::ToString(rtc::CreateRandomId64());
106 const std::string session_version =
107 rtc::ToString(rtc::CreateRandomId());
108 jsep_desc_.reset(new JsepSessionDescription("dummy"));
109 ASSERT_TRUE(jsep_desc_->Initialize(CreateCricketSessionDescription(),
110 session_id, session_version));
111 }
112
Serialize(const SessionDescriptionInterface * desc)113 std::string Serialize(const SessionDescriptionInterface* desc) {
114 std::string sdp;
115 EXPECT_TRUE(desc->ToString(&sdp));
116 EXPECT_FALSE(sdp.empty());
117 return sdp;
118 }
119
DeSerialize(const std::string & sdp)120 SessionDescriptionInterface* DeSerialize(const std::string& sdp) {
121 JsepSessionDescription* desc(new JsepSessionDescription("dummy"));
122 EXPECT_TRUE(desc->Initialize(sdp, NULL));
123 return desc;
124 }
125
126 cricket::Candidate candidate_;
127 rtc::scoped_ptr<JsepSessionDescription> jsep_desc_;
128 };
129
130 // Test that number_of_mediasections() returns the number of media contents in
131 // a session description.
TEST_F(JsepSessionDescriptionTest,CheckSessionDescription)132 TEST_F(JsepSessionDescriptionTest, CheckSessionDescription) {
133 EXPECT_EQ(2u, jsep_desc_->number_of_mediasections());
134 }
135
136 // Test that we can add a candidate to a session description.
TEST_F(JsepSessionDescriptionTest,AddCandidateWithoutMid)137 TEST_F(JsepSessionDescriptionTest, AddCandidateWithoutMid) {
138 JsepIceCandidate jsep_candidate("", 0, candidate_);
139 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
140 const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(0);
141 ASSERT_TRUE(ice_candidates != NULL);
142 EXPECT_EQ(1u, ice_candidates->count());
143 const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
144 ASSERT_TRUE(ice_candidate != NULL);
145 candidate_.set_username(kCandidateUfragVoice);
146 candidate_.set_password(kCandidatePwdVoice);
147 EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
148 EXPECT_EQ(0, ice_candidate->sdp_mline_index());
149 EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
150 }
151
TEST_F(JsepSessionDescriptionTest,AddCandidateWithMid)152 TEST_F(JsepSessionDescriptionTest, AddCandidateWithMid) {
153 // mid and m-line index don't match, in this case mid is preferred.
154 JsepIceCandidate jsep_candidate("video", 0, candidate_);
155 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
156 EXPECT_EQ(0u, jsep_desc_->candidates(0)->count());
157 const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(1);
158 ASSERT_TRUE(ice_candidates != NULL);
159 EXPECT_EQ(1u, ice_candidates->count());
160 const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
161 ASSERT_TRUE(ice_candidate != NULL);
162 candidate_.set_username(kCandidateUfragVideo);
163 candidate_.set_password(kCandidatePwdVideo);
164 EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
165 // The mline index should have been updated according to mid.
166 EXPECT_EQ(1, ice_candidate->sdp_mline_index());
167 }
168
TEST_F(JsepSessionDescriptionTest,AddCandidateAlreadyHasUfrag)169 TEST_F(JsepSessionDescriptionTest, AddCandidateAlreadyHasUfrag) {
170 candidate_.set_username(kCandidateUfrag);
171 candidate_.set_password(kCandidatePwd);
172 JsepIceCandidate jsep_candidate("audio", 0, candidate_);
173 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
174 const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(0);
175 ASSERT_TRUE(ice_candidates != NULL);
176 EXPECT_EQ(1u, ice_candidates->count());
177 const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
178 ASSERT_TRUE(ice_candidate != NULL);
179 candidate_.set_username(kCandidateUfrag);
180 candidate_.set_password(kCandidatePwd);
181 EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
182
183 EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
184 }
185
186 // Test that we can not add a candidate if there is no corresponding media
187 // content in the session description.
TEST_F(JsepSessionDescriptionTest,AddBadCandidate)188 TEST_F(JsepSessionDescriptionTest, AddBadCandidate) {
189 JsepIceCandidate bad_candidate1("", 55, candidate_);
190 EXPECT_FALSE(jsep_desc_->AddCandidate(&bad_candidate1));
191
192 JsepIceCandidate bad_candidate2("some weird mid", 0, candidate_);
193 EXPECT_FALSE(jsep_desc_->AddCandidate(&bad_candidate2));
194 }
195
196 // Tests that repeatedly adding the same candidate, with or without credentials,
197 // does not increase the number of candidates in the description.
TEST_F(JsepSessionDescriptionTest,AddCandidateDuplicates)198 TEST_F(JsepSessionDescriptionTest, AddCandidateDuplicates) {
199 JsepIceCandidate jsep_candidate("", 0, candidate_);
200 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
201 EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
202
203 // Add the same candidate again. It should be ignored.
204 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
205 EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
206
207 // Create a new candidate, identical except that the ufrag and pwd are now
208 // populated.
209 candidate_.set_username(kCandidateUfragVoice);
210 candidate_.set_password(kCandidatePwdVoice);
211 JsepIceCandidate jsep_candidate_with_credentials("", 0, candidate_);
212
213 // This should also be identified as redundant and ignored.
214 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate_with_credentials));
215 EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
216 }
217
218 // Test that we can serialize a JsepSessionDescription and deserialize it again.
TEST_F(JsepSessionDescriptionTest,SerializeDeserialize)219 TEST_F(JsepSessionDescriptionTest, SerializeDeserialize) {
220 std::string sdp = Serialize(jsep_desc_.get());
221
222 scoped_ptr<SessionDescriptionInterface> parsed_jsep_desc(DeSerialize(sdp));
223 EXPECT_EQ(2u, parsed_jsep_desc->number_of_mediasections());
224
225 std::string parsed_sdp = Serialize(parsed_jsep_desc.get());
226 EXPECT_EQ(sdp, parsed_sdp);
227 }
228
229 // Tests that we can serialize and deserialize a JsepSesssionDescription
230 // with candidates.
TEST_F(JsepSessionDescriptionTest,SerializeDeserializeWithCandidates)231 TEST_F(JsepSessionDescriptionTest, SerializeDeserializeWithCandidates) {
232 std::string sdp = Serialize(jsep_desc_.get());
233
234 // Add a candidate and check that the serialized result is different.
235 JsepIceCandidate jsep_candidate("audio", 0, candidate_);
236 EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
237 std::string sdp_with_candidate = Serialize(jsep_desc_.get());
238 EXPECT_NE(sdp, sdp_with_candidate);
239
240 scoped_ptr<SessionDescriptionInterface> parsed_jsep_desc(
241 DeSerialize(sdp_with_candidate));
242 std::string parsed_sdp_with_candidate = Serialize(parsed_jsep_desc.get());
243
244 EXPECT_EQ(sdp_with_candidate, parsed_sdp_with_candidate);
245 }
246