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/*
* Copyright 2004 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.
*/
#ifndef WEBRTC_P2P_BASE_PORTALLOCATOR_H_
#define WEBRTC_P2P_BASE_PORTALLOCATOR_H_
#include <string>
#include <vector>
#include "webrtc/p2p/base/portinterface.h"
#include "webrtc/base/helpers.h"
#include "webrtc/base/proxyinfo.h"
#include "webrtc/base/sigslot.h"
namespace cricket {
// PortAllocator is responsible for allocating Port types for a given
// P2PSocket. It also handles port freeing.
//
// Clients can override this class to control port allocation, including
// what kinds of ports are allocated.
enum {
// Disable local UDP ports. This doesn't impact how we connect to relay
// servers.
PORTALLOCATOR_DISABLE_UDP = 0x01,
PORTALLOCATOR_DISABLE_STUN = 0x02,
PORTALLOCATOR_DISABLE_RELAY = 0x04,
// Disable local TCP ports. This doesn't impact how we connect to relay
// servers.
PORTALLOCATOR_DISABLE_TCP = 0x08,
PORTALLOCATOR_ENABLE_SHAKER = 0x10,
PORTALLOCATOR_ENABLE_IPV6 = 0x40,
PORTALLOCATOR_ENABLE_SHARED_UFRAG = 0x80,
PORTALLOCATOR_ENABLE_SHARED_SOCKET = 0x100,
PORTALLOCATOR_ENABLE_STUN_RETRANSMIT_ATTRIBUTE = 0x200,
PORTALLOCATOR_DISABLE_ADAPTER_ENUMERATION = 0x400,
// When specified, a loopback candidate will be generated if
// PORTALLOCATOR_DISABLE_ADAPTER_ENUMERATION is specified.
PORTALLOCATOR_ENABLE_LOCALHOST_CANDIDATE = 0x800,
// Disallow use of UDP when connecting to a relay server. Since proxy servers
// usually don't handle UDP, using UDP will leak the IP address.
PORTALLOCATOR_DISABLE_UDP_RELAY = 0x1000,
};
const uint32 kDefaultPortAllocatorFlags = 0;
const uint32 kDefaultStepDelay = 1000; // 1 sec step delay.
// As per RFC 5245 Appendix B.1, STUN transactions need to be paced at certain
// internal. Less than 20ms is not acceptable. We choose 50ms as our default.
const uint32 kMinimumStepDelay = 50;
// CF = CANDIDATE FILTER
enum {
CF_NONE = 0x0,
CF_HOST = 0x1,
CF_REFLEXIVE = 0x2,
CF_RELAY = 0x4,
CF_ALL = 0x7,
};
class PortAllocatorSession : public sigslot::has_slots<> {
public:
// Content name passed in mostly for logging and debugging.
// TODO(mallinath) - Change username and password to ice_ufrag and ice_pwd.
PortAllocatorSession(const std::string& content_name,
int component,
const std::string& username,
const std::string& password,
uint32 flags);
// Subclasses should clean up any ports created.
virtual ~PortAllocatorSession() {}
uint32 flags() const { return flags_; }
void set_flags(uint32 flags) { flags_ = flags; }
std::string content_name() const { return content_name_; }
int component() const { return component_; }
// Starts gathering STUN and Relay configurations.
virtual void StartGettingPorts() = 0;
virtual void StopGettingPorts() = 0;
virtual bool IsGettingPorts() = 0;
sigslot::signal2<PortAllocatorSession*, PortInterface*> SignalPortReady;
sigslot::signal2<PortAllocatorSession*,
const std::vector<Candidate>&> SignalCandidatesReady;
sigslot::signal1<PortAllocatorSession*> SignalCandidatesAllocationDone;
virtual uint32 generation() { return generation_; }
virtual void set_generation(uint32 generation) { generation_ = generation; }
sigslot::signal1<PortAllocatorSession*> SignalDestroyed;
protected:
const std::string& username() const { return username_; }
const std::string& password() const { return password_; }
std::string content_name_;
int component_;
private:
uint32 flags_;
uint32 generation_;
std::string username_;
std::string password_;
};
class PortAllocator : public sigslot::has_slots<> {
public:
PortAllocator() :
flags_(kDefaultPortAllocatorFlags),
min_port_(0),
max_port_(0),
step_delay_(kDefaultStepDelay),
allow_tcp_listen_(true),
candidate_filter_(CF_ALL) {
// This will allow us to have old behavior on non webrtc clients.
}
virtual ~PortAllocator() {}
PortAllocatorSession* CreateSession(
const std::string& sid,
const std::string& content_name,
int component,
const std::string& ice_ufrag,
const std::string& ice_pwd);
uint32 flags() const { return flags_; }
void set_flags(uint32 flags) { flags_ = flags; }
const std::string& user_agent() const { return agent_; }
const rtc::ProxyInfo& proxy() const { return proxy_; }
void set_proxy(const std::string& agent, const rtc::ProxyInfo& proxy) {
agent_ = agent;
proxy_ = proxy;
}
// Gets/Sets the port range to use when choosing client ports.
int min_port() const { return min_port_; }
int max_port() const { return max_port_; }
bool SetPortRange(int min_port, int max_port) {
if (min_port > max_port) {
return false;
}
min_port_ = min_port;
max_port_ = max_port;
return true;
}
uint32 step_delay() const { return step_delay_; }
void set_step_delay(uint32 delay) {
step_delay_ = delay;
}
bool allow_tcp_listen() const { return allow_tcp_listen_; }
void set_allow_tcp_listen(bool allow_tcp_listen) {
allow_tcp_listen_ = allow_tcp_listen;
}
uint32 candidate_filter() { return candidate_filter_; }
bool set_candidate_filter(uint32 filter) {
// TODO(mallinath) - Do transition check?
candidate_filter_ = filter;
return true;
}
// Gets/Sets the Origin value used for WebRTC STUN requests.
const std::string& origin() const { return origin_; }
void set_origin(const std::string& origin) { origin_ = origin; }
protected:
virtual PortAllocatorSession* CreateSessionInternal(
const std::string& content_name,
int component,
const std::string& ice_ufrag,
const std::string& ice_pwd) = 0;
uint32 flags_;
std::string agent_;
rtc::ProxyInfo proxy_;
int min_port_;
int max_port_;
uint32 step_delay_;
bool allow_tcp_listen_;
uint32 candidate_filter_;
std::string origin_;
};
} // namespace cricket
#endif // WEBRTC_P2P_BASE_PORTALLOCATOR_H_