rtpudpv6transmitter.h

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/*

  This file is a part of JRTPLIB
  Copyright (c) 1999-2016 Jori Liesenborgs

  Contact: jori.liesenborgs@gmail.com

  This library was developed at the Expertise Centre for Digital Media
  (http://www.edm.uhasselt.be), a research center of the Hasselt University
  (http://www.uhasselt.be). The library is based upon work done for 
  my thesis at the School for Knowledge Technology (Belgium/The Netherlands).

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  IN THE SOFTWARE.

*/

#ifndef RTPUDPV6TRANSMITTER_H

#define RTPUDPV6TRANSMITTER_H

#include "rtpconfig.h"

#ifdef RTP_SUPPORT_IPV6

#include "rtptransmitter.h"
#include "rtpipv6destination.h"
#include "rtphashtable.h"
#include "rtpkeyhashtable.h"
#include "rtpsocketutil.h"
#include <string.h>
#include <list>

#ifdef RTP_SUPPORT_THREAD
    #include <jthread/jmutex.h>
#endif // RTP_SUPPORT_THREAD

#define RTPUDPV6TRANS_HASHSIZE                                      8317
#define RTPUDPV6TRANS_DEFAULTPORTBASE                               5000

#define RTPUDPV6TRANS_RTPRECEIVEBUFFER                          32768
#define RTPUDPV6TRANS_RTCPRECEIVEBUFFER                         32768
#define RTPUDPV6TRANS_RTPTRANSMITBUFFER                         32768
#define RTPUDPV6TRANS_RTCPTRANSMITBUFFER                        32768

namespace jrtplib
{

class JRTPLIB_IMPORTEXPORT RTPUDPv6TransmissionParams : public RTPTransmissionParams
{
public:
    RTPUDPv6TransmissionParams():RTPTransmissionParams(RTPTransmitter::IPv6UDPProto)    { portbase = RTPUDPV6TRANS_DEFAULTPORTBASE; for (int i = 0 ; i < 16 ; i++) bindIP.s6_addr[i] = 0; multicastTTL = 1; mcastifidx = 0; rtpsendbuf = RTPUDPV6TRANS_RTPTRANSMITBUFFER; rtprecvbuf= RTPUDPV6TRANS_RTPRECEIVEBUFFER; rtcpsendbuf = RTPUDPV6TRANS_RTCPTRANSMITBUFFER; rtcprecvbuf = RTPUDPV6TRANS_RTCPRECEIVEBUFFER; }

    void SetBindIP(in6_addr ip)                                         { bindIP = ip; }

    void SetMulticastInterfaceIndex(unsigned int idx)                   { mcastifidx = idx; }

    void SetPortbase(uint16_t pbase)                                    { portbase = pbase; }

    void SetMulticastTTL(uint8_t mcastTTL)                              { multicastTTL = mcastTTL; }

    void SetLocalIPList(std::list<in6_addr> &iplist)                    { localIPs = iplist; } 

    void ClearLocalIPList()                                             { localIPs.clear(); }

    in6_addr GetBindIP() const                                          { return bindIP; }

    unsigned int GetMulticastInterfaceIndex() const                     { return mcastifidx; }

    uint16_t GetPortbase() const                                        { return portbase; }

    uint8_t GetMulticastTTL() const                                     { return multicastTTL; }

    const std::list<in6_addr> &GetLocalIPList() const                   { return localIPs; }

    void SetRTPSendBuffer(int s)                                { rtpsendbuf = s; }

    void SetRTPReceiveBuffer(int s)                             { rtprecvbuf = s; }

    void SetRTCPSendBuffer(int s)                               { rtcpsendbuf = s; }

    void SetRTCPReceiveBuffer(int s)                            { rtcprecvbuf = s; }

    int GetRTPSendBuffer() const                                { return rtpsendbuf; }

    int GetRTPReceiveBuffer() const                             { return rtprecvbuf; }

    int GetRTCPSendBuffer() const                               { return rtcpsendbuf; }

    int GetRTCPReceiveBuffer() const                            { return rtcprecvbuf; }
private:
    uint16_t portbase;
    in6_addr bindIP;
    unsigned int mcastifidx;
    std::list<in6_addr> localIPs;
    uint8_t multicastTTL;
    int rtpsendbuf, rtprecvbuf;
    int rtcpsendbuf, rtcprecvbuf;
};

class JRTPLIB_IMPORTEXPORT RTPUDPv6TransmissionInfo : public RTPTransmissionInfo
{
public:
    RTPUDPv6TransmissionInfo(std::list<in6_addr> iplist, SocketType rtpsock, SocketType rtcpsock) : RTPTransmissionInfo(RTPTransmitter::IPv6UDPProto) 
                                                            { localIPlist = iplist; rtpsocket = rtpsock; rtcpsocket = rtcpsock; }

    ~RTPUDPv6TransmissionInfo()                             { }

    std::list<in6_addr> GetLocalIPList() const              { return localIPlist; }

    SocketType GetRTPSocket() const                             { return rtpsocket; }

    SocketType GetRTCPSocket() const                                { return rtcpsocket; }
private:
    std::list<in6_addr> localIPlist;
    SocketType rtpsocket,rtcpsocket;
};
        
class JRTPLIB_IMPORTEXPORT RTPUDPv6Trans_GetHashIndex_IPv6Dest
{
public:
    static int GetIndex(const RTPIPv6Destination &d)                    { in6_addr ip = d.GetIP(); return ((((uint32_t)ip.s6_addr[12])<<24)|(((uint32_t)ip.s6_addr[13])<<16)|(((uint32_t)ip.s6_addr[14])<<8)|((uint32_t)ip.s6_addr[15]))%RTPUDPV6TRANS_HASHSIZE; }
};

class JRTPLIB_IMPORTEXPORT RTPUDPv6Trans_GetHashIndex_in6_addr
{
public:
    static int GetIndex(const in6_addr &ip)                         { return ((((uint32_t)ip.s6_addr[12])<<24)|(((uint32_t)ip.s6_addr[13])<<16)|(((uint32_t)ip.s6_addr[14])<<8)|((uint32_t)ip.s6_addr[15]))%RTPUDPV6TRANS_HASHSIZE; }
};

#define RTPUDPV6TRANS_HEADERSIZE                                (40+8)
    
class JRTPLIB_IMPORTEXPORT RTPUDPv6Transmitter : public RTPTransmitter
{
public:
    RTPUDPv6Transmitter(RTPMemoryManager *mgr);
    ~RTPUDPv6Transmitter();

    int Init(bool treadsafe);
    int Create(size_t maxpacksize,const RTPTransmissionParams *transparams);
    void Destroy();
    RTPTransmissionInfo *GetTransmissionInfo();
    void DeleteTransmissionInfo(RTPTransmissionInfo *inf);

    int GetLocalHostName(uint8_t *buffer,size_t *bufferlength);
    bool ComesFromThisTransmitter(const RTPAddress *addr);
    size_t GetHeaderOverhead()                              { return RTPUDPV6TRANS_HEADERSIZE; }
    
    int Poll();
    int WaitForIncomingData(const RTPTime &delay,bool *dataavailable = 0);
    int AbortWait();
    
    int SendRTPData(const void *data,size_t len);   
    int SendRTCPData(const void *data,size_t len);

    int AddDestination(const RTPAddress &addr);
    int DeleteDestination(const RTPAddress &addr);
    void ClearDestinations();

    bool SupportsMulticasting();
    int JoinMulticastGroup(const RTPAddress &addr);
    int LeaveMulticastGroup(const RTPAddress &addr);
    void LeaveAllMulticastGroups();

    int SetReceiveMode(RTPTransmitter::ReceiveMode m);
    int AddToIgnoreList(const RTPAddress &addr);
    int DeleteFromIgnoreList(const RTPAddress &addr);
    void ClearIgnoreList();
    int AddToAcceptList(const RTPAddress &addr);
    int DeleteFromAcceptList(const RTPAddress &addr);
    void ClearAcceptList();
    int SetMaximumPacketSize(size_t s); 
    
    bool NewDataAvailable();
    RTPRawPacket *GetNextPacket();
#ifdef RTPDEBUG
    void Dump();
#endif // RTPDEBUG
private:
    int CreateLocalIPList();
    bool GetLocalIPList_Interfaces();
    void GetLocalIPList_DNS();
    void AddLoopbackAddress();
    void FlushPackets();
    int PollSocket(bool rtp);
    int ProcessAddAcceptIgnoreEntry(in6_addr ip,uint16_t port);
    int ProcessDeleteAcceptIgnoreEntry(in6_addr ip,uint16_t port);
#ifdef RTP_SUPPORT_IPV6MULTICAST
    bool SetMulticastTTL(uint8_t ttl);
#endif // RTP_SUPPORT_IPV6MULTICAST
    bool ShouldAcceptData(in6_addr srcip,uint16_t srcport);
    void ClearAcceptIgnoreInfo();
    
    bool init;
    bool created;
    bool waitingfordata;
    SocketType rtpsock,rtcpsock;
    in6_addr bindIP;
    unsigned int mcastifidx;
    std::list<in6_addr> localIPs;
    uint16_t portbase;
    uint8_t multicastTTL;
    RTPTransmitter::ReceiveMode receivemode;

    uint8_t *localhostname;
    size_t localhostnamelength;
    
    RTPHashTable<const RTPIPv6Destination,RTPUDPv6Trans_GetHashIndex_IPv6Dest,RTPUDPV6TRANS_HASHSIZE> destinations;
#ifdef RTP_SUPPORT_IPV6MULTICAST
    RTPHashTable<const in6_addr,RTPUDPv6Trans_GetHashIndex_in6_addr,RTPUDPV6TRANS_HASHSIZE> multicastgroups;
#endif // RTP_SUPPORT_IPV6MULTICAST
    std::list<RTPRawPacket*> rawpacketlist;

    bool supportsmulticasting;
    size_t maxpacksize;

    class PortInfo
    {
    public:
        PortInfo() { all = false; }
        
        bool all;
        std::list<uint16_t> portlist;
    };

    RTPKeyHashTable<const in6_addr,PortInfo*,RTPUDPv6Trans_GetHashIndex_in6_addr,RTPUDPV6TRANS_HASHSIZE> acceptignoreinfo;

    // notification descriptors for AbortWait (0 is for reading, 1 for writing)
    SocketType abortdesc[2];

    int CreateAbortDescriptors();
    void DestroyAbortDescriptors();
    void AbortWaitInternal();
#ifdef RTP_SUPPORT_THREAD
    jthread::JMutex mainmutex,waitmutex;
    int threadsafe;
#endif // RTP_SUPPORT_THREAD
};

} // end namespace

#endif // RTP_SUPPORT_IPV6

#endif // RTPUDPV6TRANSMITTER_H