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/*
* Copyright 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/jsep_session_description.h"
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "api/candidate.h"
#include "api/jsep.h"
#include "api/jsep_ice_candidate.h"
#include "media/base/codec.h"
#include "p2p/base/p2p_constants.h"
#include "p2p/base/port.h"
#include "p2p/base/transport_description.h"
#include "p2p/base/transport_info.h"
#include "pc/session_description.h"
#include "pc/webrtc_sdp.h"
#include "rtc_base/helpers.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/string_encode.h"
#include "test/gtest.h"
using cricket::MediaProtocolType;
using ::testing::Values;
using webrtc::IceCandidateCollection;
using webrtc::IceCandidateInterface;
using webrtc::JsepIceCandidate;
using webrtc::JsepSessionDescription;
using webrtc::SdpType;
using webrtc::SessionDescriptionInterface;
static const char kCandidateUfrag[] = "ufrag";
static const char kCandidatePwd[] = "pwd";
static const char kCandidateUfragVoice[] = "ufrag_voice";
static const char kCandidatePwdVoice[] = "pwd_voice";
static const char kCandidateUfragVideo[] = "ufrag_video";
static const char kCandidatePwdVideo[] = "pwd_video";
static const char kCandidateFoundation[] = "a0+B/1";
static const uint32_t kCandidatePriority = 2130706432U; // pref = 1.0
static const uint32_t kCandidateGeneration = 2;
// This creates a session description with both audio and video media contents.
// In SDP this is described by two m lines, one audio and one video.
static std::unique_ptr<cricket::SessionDescription>
CreateCricketSessionDescription() {
auto desc = std::make_unique<cricket::SessionDescription>();
// AudioContentDescription
auto audio = std::make_unique<cricket::AudioContentDescription>();
// VideoContentDescription
auto video = std::make_unique<cricket::VideoContentDescription>();
audio->AddCodec(cricket::AudioCodec(103, "ISAC", 16000, 0, 0));
desc->AddContent(cricket::CN_AUDIO, MediaProtocolType::kRtp,
std::move(audio));
video->AddCodec(cricket::VideoCodec(120, "VP8"));
desc->AddContent(cricket::CN_VIDEO, MediaProtocolType::kRtp,
std::move(video));
desc->AddTransportInfo(cricket::TransportInfo(
cricket::CN_AUDIO,
cricket::TransportDescription(
std::vector<std::string>(), kCandidateUfragVoice, kCandidatePwdVoice,
cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_NONE, NULL)));
desc->AddTransportInfo(cricket::TransportInfo(
cricket::CN_VIDEO,
cricket::TransportDescription(
std::vector<std::string>(), kCandidateUfragVideo, kCandidatePwdVideo,
cricket::ICEMODE_FULL, cricket::CONNECTIONROLE_NONE, NULL)));
return desc;
}
class JsepSessionDescriptionTest : public ::testing::Test {
protected:
virtual void SetUp() {
int port = 1234;
rtc::SocketAddress address("127.0.0.1", port++);
cricket::Candidate candidate(cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
address, 1, "", "", "local", 0, "1");
candidate_ = candidate;
const std::string session_id = rtc::ToString(rtc::CreateRandomId64());
const std::string session_version = rtc::ToString(rtc::CreateRandomId());
jsep_desc_ = std::make_unique<JsepSessionDescription>(SdpType::kOffer);
ASSERT_TRUE(jsep_desc_->Initialize(CreateCricketSessionDescription(),
session_id, session_version));
}
std::string Serialize(const SessionDescriptionInterface* desc) {
std::string sdp;
EXPECT_TRUE(desc->ToString(&sdp));
EXPECT_FALSE(sdp.empty());
return sdp;
}
std::unique_ptr<SessionDescriptionInterface> DeSerialize(
const std::string& sdp) {
auto jsep_desc = std::make_unique<JsepSessionDescription>(SdpType::kOffer);
EXPECT_TRUE(webrtc::SdpDeserialize(sdp, jsep_desc.get(), nullptr));
return std::move(jsep_desc);
}
cricket::Candidate candidate_;
std::unique_ptr<JsepSessionDescription> jsep_desc_;
};
// Test that number_of_mediasections() returns the number of media contents in
// a session description.
TEST_F(JsepSessionDescriptionTest, CheckSessionDescription) {
EXPECT_EQ(2u, jsep_desc_->number_of_mediasections());
}
// Test that we can add a candidate to a session description without MID.
TEST_F(JsepSessionDescriptionTest, AddCandidateWithoutMid) {
JsepIceCandidate jsep_candidate("", 0, candidate_);
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(0);
ASSERT_TRUE(ice_candidates != NULL);
EXPECT_EQ(1u, ice_candidates->count());
const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
ASSERT_TRUE(ice_candidate != NULL);
candidate_.set_username(kCandidateUfragVoice);
candidate_.set_password(kCandidatePwdVoice);
EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
EXPECT_EQ(0, ice_candidate->sdp_mline_index());
EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
}
// Test that we can add and remove candidates to a session description with
// MID. Removing candidates requires MID (transport_name).
TEST_F(JsepSessionDescriptionTest, AddAndRemoveCandidatesWithMid) {
// mid and m-line index don't match, in this case mid is preferred.
std::string mid = "video";
JsepIceCandidate jsep_candidate(mid, 0, candidate_);
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
EXPECT_EQ(0u, jsep_desc_->candidates(0)->count());
const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(1);
ASSERT_TRUE(ice_candidates != NULL);
EXPECT_EQ(1u, ice_candidates->count());
const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
ASSERT_TRUE(ice_candidate != NULL);
candidate_.set_username(kCandidateUfragVideo);
candidate_.set_password(kCandidatePwdVideo);
EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
// The mline index should have been updated according to mid.
EXPECT_EQ(1, ice_candidate->sdp_mline_index());
std::vector<cricket::Candidate> candidates(1, candidate_);
candidates[0].set_transport_name(mid);
EXPECT_EQ(1u, jsep_desc_->RemoveCandidates(candidates));
EXPECT_EQ(0u, jsep_desc_->candidates(0)->count());
EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
}
TEST_F(JsepSessionDescriptionTest, AddCandidateAlreadyHasUfrag) {
candidate_.set_username(kCandidateUfrag);
candidate_.set_password(kCandidatePwd);
JsepIceCandidate jsep_candidate("audio", 0, candidate_);
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(0);
ASSERT_TRUE(ice_candidates != NULL);
EXPECT_EQ(1u, ice_candidates->count());
const IceCandidateInterface* ice_candidate = ice_candidates->at(0);
ASSERT_TRUE(ice_candidate != NULL);
candidate_.set_username(kCandidateUfrag);
candidate_.set_password(kCandidatePwd);
EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
}
// Test that we can not add a candidate if there is no corresponding media
// content in the session description.
TEST_F(JsepSessionDescriptionTest, AddBadCandidate) {
JsepIceCandidate bad_candidate1("", 55, candidate_);
EXPECT_FALSE(jsep_desc_->AddCandidate(&bad_candidate1));
JsepIceCandidate bad_candidate2("some weird mid", 0, candidate_);
EXPECT_FALSE(jsep_desc_->AddCandidate(&bad_candidate2));
}
// Tests that repeatedly adding the same candidate, with or without credentials,
// does not increase the number of candidates in the description.
TEST_F(JsepSessionDescriptionTest, AddCandidateDuplicates) {
JsepIceCandidate jsep_candidate("", 0, candidate_);
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
// Add the same candidate again. It should be ignored.
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
// Create a new candidate, identical except that the ufrag and pwd are now
// populated.
candidate_.set_username(kCandidateUfragVoice);
candidate_.set_password(kCandidatePwdVoice);
JsepIceCandidate jsep_candidate_with_credentials("", 0, candidate_);
// This should also be identified as redundant and ignored.
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate_with_credentials));
EXPECT_EQ(1u, jsep_desc_->candidates(0)->count());
}
// Test that the connection address is set to a hostname address after adding a
// hostname candidate.
TEST_F(JsepSessionDescriptionTest, AddHostnameCandidate) {
cricket::Candidate c;
c.set_component(cricket::ICE_CANDIDATE_COMPONENT_RTP);
c.set_protocol(cricket::UDP_PROTOCOL_NAME);
c.set_address(rtc::SocketAddress("example.local", 1234));
c.set_type(cricket::LOCAL_PORT_TYPE);
const size_t audio_index = 0;
JsepIceCandidate hostname_candidate("audio", audio_index, c);
EXPECT_TRUE(jsep_desc_->AddCandidate(&hostname_candidate));
ASSERT_NE(nullptr, jsep_desc_->description());
ASSERT_EQ(2u, jsep_desc_->description()->contents().size());
const auto& content = jsep_desc_->description()->contents()[audio_index];
EXPECT_EQ("0.0.0.0:9",
content.media_description()->connection_address().ToString());
}
// Test that we can serialize a JsepSessionDescription and deserialize it again.
TEST_F(JsepSessionDescriptionTest, SerializeDeserialize) {
std::string sdp = Serialize(jsep_desc_.get());
auto parsed_jsep_desc = DeSerialize(sdp);
EXPECT_EQ(2u, parsed_jsep_desc->number_of_mediasections());
std::string parsed_sdp = Serialize(parsed_jsep_desc.get());
EXPECT_EQ(sdp, parsed_sdp);
}
// Test that we can serialize a JsepSessionDescription when a hostname candidate
// is the default destination and deserialize it again. The connection address
// in the deserialized description should be the dummy address 0.0.0.0:9.
TEST_F(JsepSessionDescriptionTest, SerializeDeserializeWithHostnameCandidate) {
cricket::Candidate c;
c.set_component(cricket::ICE_CANDIDATE_COMPONENT_RTP);
c.set_protocol(cricket::UDP_PROTOCOL_NAME);
c.set_address(rtc::SocketAddress("example.local", 1234));
c.set_type(cricket::LOCAL_PORT_TYPE);
const size_t audio_index = 0;
const size_t video_index = 1;
JsepIceCandidate hostname_candidate_audio("audio", audio_index, c);
JsepIceCandidate hostname_candidate_video("video", video_index, c);
EXPECT_TRUE(jsep_desc_->AddCandidate(&hostname_candidate_audio));
EXPECT_TRUE(jsep_desc_->AddCandidate(&hostname_candidate_video));
std::string sdp = Serialize(jsep_desc_.get());
auto parsed_jsep_desc = DeSerialize(sdp);
EXPECT_EQ(2u, parsed_jsep_desc->number_of_mediasections());
ASSERT_NE(nullptr, parsed_jsep_desc->description());
ASSERT_EQ(2u, parsed_jsep_desc->description()->contents().size());
const auto& audio_content =
parsed_jsep_desc->description()->contents()[audio_index];
const auto& video_content =
parsed_jsep_desc->description()->contents()[video_index];
EXPECT_EQ("0.0.0.0:9",
audio_content.media_description()->connection_address().ToString());
EXPECT_EQ("0.0.0.0:9",
video_content.media_description()->connection_address().ToString());
}
// Tests that we can serialize and deserialize a JsepSesssionDescription
// with candidates.
TEST_F(JsepSessionDescriptionTest, SerializeDeserializeWithCandidates) {
std::string sdp = Serialize(jsep_desc_.get());
// Add a candidate and check that the serialized result is different.
JsepIceCandidate jsep_candidate("audio", 0, candidate_);
EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
std::string sdp_with_candidate = Serialize(jsep_desc_.get());
EXPECT_NE(sdp, sdp_with_candidate);
auto parsed_jsep_desc = DeSerialize(sdp_with_candidate);
std::string parsed_sdp_with_candidate = Serialize(parsed_jsep_desc.get());
EXPECT_EQ(sdp_with_candidate, parsed_sdp_with_candidate);
}
// TODO(zhihuang): Modify these tests. These are used to verify that after
// adding the candidates, the connection_address field is set correctly. Modify
// those so that the "connection address" is tested directly.
// Tests serialization of SDP with only IPv6 candidates and verifies that IPv6
// is used as default address in c line according to preference.
TEST_F(JsepSessionDescriptionTest, SerializeSessionDescriptionWithIPv6Only) {
// Stun has a high preference than local host.
cricket::Candidate candidate1(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("::1", 1234), kCandidatePriority, "", "",
cricket::STUN_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
cricket::Candidate candidate2(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("::2", 1235), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
JsepIceCandidate jice1("audio", 0, candidate1);
JsepIceCandidate jice2("audio", 0, candidate2);
JsepIceCandidate jice3("video", 0, candidate1);
JsepIceCandidate jice4("video", 0, candidate2);
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice1));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice2));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice3));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice4));
std::string message = Serialize(jsep_desc_.get());
// Should have a c line like this one.
EXPECT_NE(message.find("c=IN IP6 ::1"), std::string::npos);
// Shouldn't have a IP4 c line.
EXPECT_EQ(message.find("c=IN IP4"), std::string::npos);
}
// Tests serialization of SDP with both IPv4 and IPv6 candidates and
// verifies that IPv4 is used as default address in c line even if the
// preference of IPv4 is lower.
TEST_F(JsepSessionDescriptionTest,
SerializeSessionDescriptionWithBothIPFamilies) {
cricket::Candidate candidate_v4(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("192.168.1.5", 1234), kCandidatePriority, "", "",
cricket::STUN_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
cricket::Candidate candidate_v6(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("::1", 1234), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
JsepIceCandidate jice_v4("audio", 0, candidate_v4);
JsepIceCandidate jice_v6("audio", 0, candidate_v6);
JsepIceCandidate jice_v4_video("video", 0, candidate_v4);
JsepIceCandidate jice_v6_video("video", 0, candidate_v6);
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice_v4));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice_v6));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice_v4_video));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice_v6_video));
std::string message = Serialize(jsep_desc_.get());
// Should have a c line like this one.
EXPECT_NE(message.find("c=IN IP4 192.168.1.5"), std::string::npos);
// Shouldn't have a IP6 c line.
EXPECT_EQ(message.find("c=IN IP6"), std::string::npos);
}
// Tests serialization of SDP with both UDP and TCP candidates and
// verifies that UDP is used as default address in c line even if the
// preference of UDP is lower.
TEST_F(JsepSessionDescriptionTest,
SerializeSessionDescriptionWithBothProtocols) {
// Stun has a high preference than local host.
cricket::Candidate candidate1(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "tcp",
rtc::SocketAddress("::1", 1234), kCandidatePriority, "", "",
cricket::STUN_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
cricket::Candidate candidate2(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("fe80::1234:5678:abcd:ef12", 1235), kCandidatePriority,
"", "", cricket::LOCAL_PORT_TYPE, kCandidateGeneration,
kCandidateFoundation);
JsepIceCandidate jice1("audio", 0, candidate1);
JsepIceCandidate jice2("audio", 0, candidate2);
JsepIceCandidate jice3("video", 0, candidate1);
JsepIceCandidate jice4("video", 0, candidate2);
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice1));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice2));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice3));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice4));
std::string message = Serialize(jsep_desc_.get());
// Should have a c line like this one.
EXPECT_NE(message.find("c=IN IP6 fe80::1234:5678:abcd:ef12"),
std::string::npos);
// Shouldn't have a IP4 c line.
EXPECT_EQ(message.find("c=IN IP4"), std::string::npos);
}
// Tests serialization of SDP with only TCP candidates and verifies that
// null IPv4 is used as default address in c line.
TEST_F(JsepSessionDescriptionTest, SerializeSessionDescriptionWithTCPOnly) {
// Stun has a high preference than local host.
cricket::Candidate candidate1(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "tcp",
rtc::SocketAddress("::1", 1234), kCandidatePriority, "", "",
cricket::STUN_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
cricket::Candidate candidate2(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "tcp",
rtc::SocketAddress("::2", 1235), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
JsepIceCandidate jice1("audio", 0, candidate1);
JsepIceCandidate jice2("audio", 0, candidate2);
JsepIceCandidate jice3("video", 0, candidate1);
JsepIceCandidate jice4("video", 0, candidate2);
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice1));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice2));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice3));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice4));
std::string message = Serialize(jsep_desc_.get());
EXPECT_EQ(message.find("c=IN IP6 ::3"), std::string::npos);
// Should have a c line like this one when no any default exists.
EXPECT_NE(message.find("c=IN IP4 0.0.0.0"), std::string::npos);
}
// Tests that the connection address will be correctly set when the Candidate is
// removed.
TEST_F(JsepSessionDescriptionTest, RemoveCandidateAndSetConnectionAddress) {
cricket::Candidate candidate1(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("::1", 1234), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
candidate1.set_transport_name("audio");
cricket::Candidate candidate2(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "tcp",
rtc::SocketAddress("::2", 1235), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
candidate2.set_transport_name("audio");
cricket::Candidate candidate3(
cricket::ICE_CANDIDATE_COMPONENT_RTP, "udp",
rtc::SocketAddress("192.168.1.1", 1236), kCandidatePriority, "", "",
cricket::LOCAL_PORT_TYPE, kCandidateGeneration, kCandidateFoundation);
candidate3.set_transport_name("audio");
JsepIceCandidate jice1("audio", 0, candidate1);
JsepIceCandidate jice2("audio", 0, candidate2);
JsepIceCandidate jice3("audio", 0, candidate3);
size_t audio_index = 0;
auto media_desc =
jsep_desc_->description()->contents()[audio_index].media_description();
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice1));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice2));
ASSERT_TRUE(jsep_desc_->AddCandidate(&jice3));
std::vector<cricket::Candidate> candidates;
EXPECT_EQ("192.168.1.1:1236", media_desc->connection_address().ToString());
candidates.push_back(candidate3);
ASSERT_TRUE(jsep_desc_->RemoveCandidates(candidates));
EXPECT_EQ("[::1]:1234", media_desc->connection_address().ToString());
candidates.clear();
candidates.push_back(candidate2);
ASSERT_TRUE(jsep_desc_->RemoveCandidates(candidates));
EXPECT_EQ("[::1]:1234", media_desc->connection_address().ToString());
candidates.clear();
candidates.push_back(candidate1);
ASSERT_TRUE(jsep_desc_->RemoveCandidates(candidates));
EXPECT_EQ("0.0.0.0:9", media_desc->connection_address().ToString());
}
class EnumerateAllSdpTypesTest : public ::testing::Test,
public ::testing::WithParamInterface<SdpType> {
};
TEST_P(EnumerateAllSdpTypesTest, TestIdentity) {
SdpType type = GetParam();
const char* str = webrtc::SdpTypeToString(type);
EXPECT_EQ(type, webrtc::SdpTypeFromString(str));
}
INSTANTIATE_TEST_SUITE_P(JsepSessionDescriptionTest,
EnumerateAllSdpTypesTest,
Values(SdpType::kOffer,
SdpType::kPrAnswer,
SdpType::kAnswer));
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