1 /*
2 * Copyright 2017 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "api/candidate.h"
12
13 namespace cricket {
14
Candidate()15 Candidate::Candidate()
16 : id_(rtc::CreateRandomString(8)),
17 component_(0),
18 priority_(0),
19 network_type_(rtc::ADAPTER_TYPE_UNKNOWN),
20 generation_(0),
21 network_id_(0),
22 network_cost_(0) {}
23
Candidate(int component,const std::string & protocol,const rtc::SocketAddress & address,uint32_t priority,const std::string & username,const std::string & password,const std::string & type,uint32_t generation,const std::string & foundation,uint16_t network_id,uint16_t network_cost)24 Candidate::Candidate(int component,
25 const std::string& protocol,
26 const rtc::SocketAddress& address,
27 uint32_t priority,
28 const std::string& username,
29 const std::string& password,
30 const std::string& type,
31 uint32_t generation,
32 const std::string& foundation,
33 uint16_t network_id,
34 uint16_t network_cost)
35 : id_(rtc::CreateRandomString(8)),
36 component_(component),
37 protocol_(protocol),
38 address_(address),
39 priority_(priority),
40 username_(username),
41 password_(password),
42 type_(type),
43 network_type_(rtc::ADAPTER_TYPE_UNKNOWN),
44 generation_(generation),
45 foundation_(foundation),
46 network_id_(network_id),
47 network_cost_(network_cost) {}
48
49 Candidate::Candidate(const Candidate&) = default;
50
51 Candidate::~Candidate() = default;
52
IsEquivalent(const Candidate & c) const53 bool Candidate::IsEquivalent(const Candidate& c) const {
54 // We ignore the network name, since that is just debug information, and
55 // the priority and the network cost, since they should be the same if the
56 // rest are.
57 return (component_ == c.component_) && (protocol_ == c.protocol_) &&
58 (address_ == c.address_) && (username_ == c.username_) &&
59 (password_ == c.password_) && (type_ == c.type_) &&
60 (generation_ == c.generation_) && (foundation_ == c.foundation_) &&
61 (related_address_ == c.related_address_) &&
62 (network_id_ == c.network_id_);
63 }
64
MatchesForRemoval(const Candidate & c) const65 bool Candidate::MatchesForRemoval(const Candidate& c) const {
66 return component_ == c.component_ && protocol_ == c.protocol_ &&
67 address_ == c.address_;
68 }
69
ToStringInternal(bool sensitive) const70 std::string Candidate::ToStringInternal(bool sensitive) const {
71 std::ostringstream ost;
72 std::string address =
73 sensitive ? address_.ToSensitiveString() : address_.ToString();
74 ost << "Cand[" << transport_name_ << ":" << foundation_ << ":" << component_
75 << ":" << protocol_ << ":" << priority_ << ":" << address << ":" << type_
76 << ":" << related_address_ << ":" << username_ << ":" << password_ << ":"
77 << network_id_ << ":" << network_cost_ << ":" << generation_ << "]";
78 return ost.str();
79 }
80
GetPriority(uint32_t type_preference,int network_adapter_preference,int relay_preference) const81 uint32_t Candidate::GetPriority(uint32_t type_preference,
82 int network_adapter_preference,
83 int relay_preference) const {
84 // RFC 5245 - 4.1.2.1.
85 // priority = (2^24)*(type preference) +
86 // (2^8)*(local preference) +
87 // (2^0)*(256 - component ID)
88
89 // |local_preference| length is 2 bytes, 0-65535 inclusive.
90 // In our implemenation we will partion local_preference into
91 // 0 1
92 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
93 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
94 // | NIC Pref | Addr Pref |
95 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
96 // NIC Type - Type of the network adapter e.g. 3G/Wifi/Wired.
97 // Addr Pref - Address preference value as per RFC 3484.
98 // local preference = (NIC Type << 8 | Addr_Pref) - relay preference.
99
100 int addr_pref = IPAddressPrecedence(address_.ipaddr());
101 int local_preference =
102 ((network_adapter_preference << 8) | addr_pref) + relay_preference;
103
104 return (type_preference << 24) | (local_preference << 8) | (256 - component_);
105 }
106
operator ==(const Candidate & o) const107 bool Candidate::operator==(const Candidate& o) const {
108 return id_ == o.id_ && component_ == o.component_ &&
109 protocol_ == o.protocol_ && relay_protocol_ == o.relay_protocol_ &&
110 address_ == o.address_ && priority_ == o.priority_ &&
111 username_ == o.username_ && password_ == o.password_ &&
112 type_ == o.type_ && network_name_ == o.network_name_ &&
113 network_type_ == o.network_type_ && generation_ == o.generation_ &&
114 foundation_ == o.foundation_ &&
115 related_address_ == o.related_address_ && tcptype_ == o.tcptype_ &&
116 transport_name_ == o.transport_name_ && network_id_ == o.network_id_;
117 }
118
operator !=(const Candidate & o) const119 bool Candidate::operator!=(const Candidate& o) const {
120 return !(*this == o);
121 }
122
123 } // namespace cricket
124