/usr/include/sipxtapi/os/OsNatConnectionSocket.h is in libsipxtapi-dev 3.3.0~test17-2.1.
This file is owned by root:root, with mode 0o644.
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//
// Copyright (C) 2005 Pingtel Corp.
//
// $$
//////////////////////////////////////////////////////////////////////////////
#ifndef _OsNatConnectionSocket_h_
#define _OsNatConnectionSocket_h_
// SYSTEM INCLUDES
// APPLICATION INCLUDES
#include "os/OsConnectionSocket.h"
#include "os/OsNatDatagramSocket.h"
#include "os/OsMsgQ.h"
#include "os/OsTimer.h"
#include "os/OsQueuedEvent.h"
#include "os/OsRWMutex.h"
#include "os/OsNatSocketBaseImpl.h"
#include "utl/UtlHashMap.h"
// MACROS
// EXTERNAL FUNCTIONS
// EXTERNAL VARIABLES
// CONSTANTS
// STRUCTS
// TYPEDEFS
// FORWARD DECLARATIONS
class NatMsg ;
class OsEvent ;
class OsNatAgentTask;
class OsNatKeepaliveListener;
/**
* OsNatConnectionSocket extends an OsDatagramSocket by adding an integrated
* STUN and TURN client. If STUN or TURN is enabled, request will be send
* to the designated server every refresh period. The external addresses
* obtained by these mechanisms are retrieved by invoking getMappedIp and
* getRelayIp.
*
* For this mechanism to work, someone must pump inbound socket data by
* calling one of the ::read() methods. Otherwise, the packets will not be
* received/processed. Internally, the implemenation peeks at the read
* data and passes the message to the OsNatAgentTask for processing.
*/
class OsNatConnectionSocket : public OsConnectionSocket, public OsNatSocketBaseImpl
{
/* //////////////////////////// PUBLIC //////////////////////////////////// */
public:
friend class OsNatAgentTask ;
/* ============================ CREATORS ================================== */
OsNatConnectionSocket(int connectedSocketDescriptor,
const RtpTcpRoles role);
OsNatConnectionSocket(const char* szLocalIp,
int connectedSocketDescriptor,
const RtpTcpRoles role);
// Constructor
OsNatConnectionSocket(int serverPort,
const char* serverName,
UtlBoolean blockingConnect,
const char* localIp,
const bool bConnect,
const RtpTcpRoles role);
/**
* Standard Destructor
*/
virtual ~OsNatConnectionSocket();
/* ============================ MANIPULATORS ============================== */
virtual OsSocket* getSocket();
virtual void setRole(const RtpTcpRoles role);
virtual const RtpTcpRoles getRole() const;
/**
* Standard read, see OsDatagramSocket for details.
*/
virtual int read(char* buffer, int bufferLength) ;
/**
* Standard read, see OsDatagramSocket for details.
*/
virtual int read(char* buffer, int bufferLength,
UtlString* ipAddress, int* port);
/**
* Standard read, see OsDatagramSocket for details.
*/
virtual int read(char* buffer, int bufferLength,
struct in_addr* ipAddress, int* port);
/**
* Standard read, see OsDatagramSocket for details.
*/
virtual int read(char* buffer, int bufferLength, long waitMilliseconds);
/**
* Standard write, see OsDatagramSocket for details.
*/
virtual int write(const char* buffer, int bufferLength);
/**
* Standard write, see OsDatagramSocket for details.
*/
virtual int socketWrite(const char* buffer, int bufferLength,
const char* ipAddress, int port, PacketType packetType=UNKNOWN_PACKET);
/**
* Standard write, see OsDatagramSocket for details.
*/
virtual int write(const char* buffer, int bufferLength,
const char* ipAddress, int port);
/**
* Standard write, see OsDatagramSocket for details.
*/
virtual int write(const char* buffer, int bufferLength,
long waitMilliseconds);
/**
* Enable STUN. Enabling STUN will reset the the keep alive timer and
* will force a binding refresh.
*
* @param szStunServer
* @param stunPort
* @param iKeepAlive
* @param stunOptions
* @param bReadFromSocket
*/
virtual void enableStun(const char* szStunServer,
int stunPort,
int iKeepAlive,
int stunOptions,
bool bReadFromSocket) ;
/**
* Disable STUN. Disabling STUN will stop all keep alives and cause
* getMappedIp to fail.
*/
virtual void disableStun() ;
/**
* Enable STUN. Enabling STUN will reset the the keep alive timer and
* will force a binding refresh.
*
* @param szTurnSever
* @param turnPort
* @param iKeepAlive
* @param username
* @param password
* @param bReadFromSocket
*/
virtual void enableTurn(const char* szTurnSever,
int turnPort,
int iKeepAlive,
const char* username,
const char* password,
bool bReadFromSocket) ;
/**
* Disable TURN. Disabling TURN will stop all keep alives and cause
* getRelayIp to fail.
*/
virtual void disableTurn() ;
/**
* When a stun packet is received this socket can either call read again
* to obtain the next packet or return with zero bytes read. By default
* the socket will transparently call Read again and will block until a
* non-stun packet is read. Calling this method will effect the next
* read -- in other words it will not unblock an active read.
*
* @param bEnable True to enable transparent stun reads and block until
* a non-stun packet is received (default) or False to return
* with zero bytes read if a stun packet is received.
*/
virtual void enableTransparentReads(bool bEnable) ;
/**
* Add an alternate destination to this OsNatConnectionSocket. Alternate
* destinations are tested by sending stun packets. If a stun response is
* received and the priority is greater than what has already been selected
* then that address is used.
*
* @param szAddress IP address of the alternate destination
* @param iPort port number of the alternate destination
* @param priority priority of the alternate where a higher number
* indicates a higher priority.
*/
virtual void addAlternateDestination(const char* szAddress, int iPort, int priority) ;
/**
* Prepares a destination under TURN usage.
*/
virtual void readyDestination(const char* szAddress, int iPort) ;
/**
* Sets as notification event that is signaled upon the next successful
* stun response or on failure (did not receive a stun response within
* (STUN_ABORT_THRESHOLD * STUN_TIMEOUT_RESPONSE_MS). If a notification
* event was previous set either by calling this method or via the
* constructor, it will be overridden. If the initial STUN success/failure
* state has already been determined, this method is undefined.
*
* @param pNotification Notification event signaled on success or failure.
*/
virtual void setNotifier(OsNotification* pNotification) ;
virtual UtlBoolean addCrLfKeepAlive(const char* szRemoteIp,
const int remotePort,
const int keepAliveSecs,
OsNatKeepaliveListener* pListener) ;
virtual UtlBoolean removeCrLfKeepAlive(const char* szRemoteIp,
const int remotePort) ;
virtual UtlBoolean addStunKeepAlive(const char* szRemoteIp,
const int remotePort,
const int keepAliveSecs,
OsNatKeepaliveListener* pListener) ;
virtual UtlBoolean removeStunKeepAlive(const char* szRemoteIp,
const int remotePort) ;
/* ============================ ACCESSORS ================================= */
/**
* Return the external mapped IP address for this socket. This method will
* return false if stun is disabled, it was unable to retrieve a stun
* binding, or both the ip and port parameters are null.
*
* @param ip Buffer to place STUN-discovered IP address
* @param port Buffer to place STUN-discovered port number
*/
virtual UtlBoolean getMappedIp(UtlString* ip, int* port) ;
/**
* Return the external relay IP address for this socket. This method will
* return false if stun is disabled, it was unable to retrieve a turn
* allocation, or both the ip and port parameters are null.
*
* @param ip Buffer to place TURN-discovered IP address
* @param port Buffer to place TURN-discovered port number
*/
virtual UtlBoolean getRelayIp(UtlString* ip, int* port) ;
/**
* TODO: DOCS
*/
virtual UtlBoolean getBestDestinationAddress(UtlString& address, int& iPort) ;
/**
* TODO: DOCS
*/
virtual UtlBoolean applyDestinationAddress(const char* szAddress, int iPort) ;
/**
* Applies framing to buffers sent over streaming connections
* to a TURN server.
* Framing prepends with a header like so:
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type | Reserved = 0 | Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
*
* @param type Type of framed buffer - STUN or DATA
* @param buffer Buffer to be framed.
* @param bufferLength Length of the buffer to be framed.
* @param framedBufferLen Output parameter for the length of the
* framed buffer.
*
* @returns Pointer to a newly allocated buffer. Must be freed by caller.
*/
const char* frameBuffer(TURN_FRAMING_TYPE type,
const char* buffer,
const int bufferLength,
int& framedBufferLen);
virtual void destroy();
virtual int clientConnect(const char* szServer, const int port);
virtual bool isClientConnected(const char* szServer, const int port);
virtual OsNatConnectionSocket* getClientConnection(const char* szServer, const int port);
/* ============================ INQUIRY =================================== */
/* //////////////////////////// PROTECTED ///////////////////////////////// */
protected:
/**
* active, passive, or actpass
*/
RtpTcpRoles mRole;
mutable OsRWMutex mRoleMutex;
mutable OsMutex mStreamHandlerMutex;
/**
* Set the STUN-derived address for this socket.
*
* @param address STUN-derived hostname/IP address
* @param iPort STUN-derived port address
*/
void setStunAddress(const UtlString& address, const int iPort) ;
/**
* Set the TURN-dervied relay address for this socket.
*
* @param address TURN-derived hostname/IP address
* @param iPort TURN-derived port address
*/
void setTurnAddress(const UtlString& address, const int iPort) ;
/**
* Report that a stun attempt failed.
*/
void markStunFailure() ;
/**
* Report that a stun attempt succeeded.
*/
void markStunSuccess(bool bAddressChanged) ;
/**
* Report that a stun attempt failed.
*/
void markTurnFailure() ;
/**
* Report that a stun attempt succeeded.
*/
void markTurnSuccess() ;
/**
* Reset the destination address for this OsNatConnectionSocket. This
* method is called by the OsStunAgentTask when a better address is
* found via STUN/ICE.
*
* @param address The new destination address
* @param iPort The new destination port
* @param priority Priority of the destination address
*/
void evaluateDestinationAddress(const UtlString& address, int iPort, int priority) ;
virtual void handleFramedStream( char* pData,
const int size,
const char* receivedIp,
const int port);
virtual bool handleUnframedBuffer(const TURN_FRAMING_TYPE type,
const char* buff,
const int buffSize,
const char* receivedIp,
const int port);
bool mbTransparentReads ; /**< Block until a non-stun/turn packet is read */
/**
* This is the connection socket's analogous UDP socket.
* Used for STUN and other requests that require UDP.
*/
OsNatDatagramSocket* mpDatagramSocket;
void addClientConnection(const char* ipAddress, const int port, OsNatConnectionSocket* pClient);
UtlHashMap mClientConnectionSockets; // map of client connection sockets
// key = destination IP address
// value = OsNatConnectionSocket pointer
/* //////////////////////////// PRIVATE /////////////////////////////////// */
private:
STUN_STATE mStunState ; /**< STUN status/state */
TURN_STATE mTurnState ; /**< TURN status/state */
/* Global Attributes */
OsNatAgentTask* mpNatAgent; /**< Pointer to Nat agent task (handles refreshes) */
OsNotification* mpNotification ; /** Notify on initial stun success or failure */
bool mbNotified ; /** Have we notified the requestor? */
/* ICE Settings */
int miDestPriority ; /**< Priority of destination address / port. */
UtlString mDestAddress; /**< Destination address */
int miDestPort ; /**< Destination port */
char mszFragment[(MAX_RTP_BYTES + 4)];
int mFragmentSize;
};
#endif // _OsNatConnectionSocket_h_
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