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      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 "talk/base/gunit.h"
     33 #include "talk/base/helpers.h"
     34 #include "talk/base/scoped_ptr.h"
     35 #include "talk/base/stringencode.h"
     36 #include "talk/p2p/base/candidate.h"
     37 #include "talk/p2p/base/constants.h"
     38 #include "talk/p2p/base/sessiondescription.h"
     39 #include "talk/session/media/mediasession.h"
     40 
     41 using webrtc::IceCandidateCollection;
     42 using webrtc::IceCandidateInterface;
     43 using webrtc::JsepIceCandidate;
     44 using webrtc::JsepSessionDescription;
     45 using webrtc::SessionDescriptionInterface;
     46 using talk_base::scoped_ptr;
     47 
     48 static const char kCandidateUfrag[] = "ufrag";
     49 static const char kCandidatePwd[] = "pwd";
     50 static const char kCandidateUfragVoice[] = "ufrag_voice";
     51 static const char kCandidatePwdVoice[] = "pwd_voice";
     52 static const char kCandidateUfragVideo[] = "ufrag_video";
     53 static const char kCandidatePwdVideo[] = "pwd_video";
     54 
     55 // This creates a session description with both audio and video media contents.
     56 // In SDP this is described by two m lines, one audio and one video.
     57 static cricket::SessionDescription* CreateCricketSessionDescription() {
     58   cricket::SessionDescription* desc(new cricket::SessionDescription());
     59   // AudioContentDescription
     60   scoped_ptr<cricket::AudioContentDescription> audio(
     61       new cricket::AudioContentDescription());
     62 
     63   // VideoContentDescription
     64   scoped_ptr<cricket::VideoContentDescription> video(
     65       new cricket::VideoContentDescription());
     66 
     67   audio->AddCodec(cricket::AudioCodec(103, "ISAC", 16000, 0, 0, 0));
     68   desc->AddContent(cricket::CN_AUDIO, cricket::NS_JINGLE_RTP,
     69                    audio.release());
     70 
     71   video->AddCodec(cricket::VideoCodec(120, "VP8", 640, 480, 30, 0));
     72   desc->AddContent(cricket::CN_VIDEO, cricket::NS_JINGLE_RTP,
     73                    video.release());
     74 
     75   EXPECT_TRUE(desc->AddTransportInfo(
     76       cricket::TransportInfo(
     77                              cricket::CN_AUDIO,
     78                              cricket::TransportDescription(
     79                                  cricket::NS_GINGLE_P2P,
     80                                  std::vector<std::string>(),
     81                                  kCandidateUfragVoice, kCandidatePwdVoice,
     82                                  cricket::ICEMODE_FULL, NULL,
     83                                  cricket::Candidates()))));
     84   EXPECT_TRUE(desc->AddTransportInfo(
     85       cricket::TransportInfo(cricket::CN_VIDEO,
     86                              cricket::TransportDescription(
     87                                  cricket::NS_GINGLE_P2P,
     88                                  std::vector<std::string>(),
     89                                  kCandidateUfragVideo, kCandidatePwdVideo,
     90                                  cricket::ICEMODE_FULL, NULL,
     91                                  cricket::Candidates()))));
     92   return desc;
     93 }
     94 
     95 class JsepSessionDescriptionTest : public testing::Test {
     96  protected:
     97   virtual void SetUp() {
     98     int port = 1234;
     99     talk_base::SocketAddress address("127.0.0.1", port++);
    100     cricket::Candidate candidate("rtp", cricket::ICE_CANDIDATE_COMPONENT_RTP,
    101                                  "udp", address, 1, "",
    102                                  "", "local", "eth0", 0, "1");
    103     candidate_ = candidate;
    104     const std::string session_id =
    105         talk_base::ToString(talk_base::CreateRandomId64());
    106     const std::string session_version =
    107         talk_base::ToString(talk_base::CreateRandomId());
    108     jsep_desc_.reset(new JsepSessionDescription("dummy"));
    109     ASSERT_TRUE(jsep_desc_->Initialize(CreateCricketSessionDescription(),
    110         session_id, session_version));
    111   }
    112 
    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 
    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   talk_base::scoped_ptr<JsepSessionDescription> jsep_desc_;
    128 };
    129 
    130 // Test that number_of_mediasections() returns the number of media contents in
    131 // a session description.
    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.
    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 
    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 
    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.
    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 // Test that we can serialize a JsepSessionDescription and deserialize it again.
    197 TEST_F(JsepSessionDescriptionTest, SerializeDeserialize) {
    198   std::string sdp = Serialize(jsep_desc_.get());
    199 
    200   scoped_ptr<SessionDescriptionInterface> parsed_jsep_desc(DeSerialize(sdp));
    201   EXPECT_EQ(2u, parsed_jsep_desc->number_of_mediasections());
    202 
    203   std::string parsed_sdp = Serialize(parsed_jsep_desc.get());
    204   EXPECT_EQ(sdp, parsed_sdp);
    205 }
    206 
    207 // Tests that we can serialize and deserialize a JsepSesssionDescription
    208 // with candidates.
    209 TEST_F(JsepSessionDescriptionTest, SerializeDeserializeWithCandidates) {
    210   std::string sdp = Serialize(jsep_desc_.get());
    211 
    212   // Add a candidate and check that the serialized result is different.
    213   JsepIceCandidate jsep_candidate("audio", 0, candidate_);
    214   EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
    215   std::string sdp_with_candidate = Serialize(jsep_desc_.get());
    216   EXPECT_NE(sdp, sdp_with_candidate);
    217 
    218   scoped_ptr<SessionDescriptionInterface> parsed_jsep_desc(
    219       DeSerialize(sdp_with_candidate));
    220   std::string parsed_sdp_with_candidate = Serialize(parsed_jsep_desc.get());
    221 
    222   EXPECT_EQ(sdp_with_candidate, parsed_sdp_with_candidate);
    223 }
    224