sdpcontents.hxx

这是国外的resip协议栈

#if !defined(RESIP_SDPCONTENTS_HXX)
#define RESIP_SDPCONTENTS_HXX

#include <vector>
#include <list>
#include <iosfwd>
#include <memory>

#include "resip/stack/Contents.hxx"
#include "resip/stack/Uri.hxx"
#include "rutil/Data.hxx"
#include "rutil/HashMap.hxx"
#include "rutil/HeapInstanceCounter.hxx"

namespace resip
{

class SdpContents;

class AttributeHelper
{
   public:
      RESIP_HeapCount(AttributeHelper);
      AttributeHelper();
      AttributeHelper(const AttributeHelper& rhs);
      AttributeHelper& operator=(const AttributeHelper& rhs);

      bool exists(const Data& key) const;
      const std::list<Data>& getValues(const Data& key) const;
      std::ostream& encode(std::ostream& s) const;
      void parse(ParseBuffer& pb);
      void addAttribute(const Data& key, const Data& value = Data::Empty);
      void clearAttribute(const Data& key);
   private:
      std::list<std::pair<Data, Data> > mAttributeList;  // used to ensure attribute ordering on encode
      HashMap< Data, std::list<Data> > mAttributes;
};

class SdpContents : public Contents
{
   public:
      RESIP_HeapCount(SdpContents);
      typedef enum {IP4=1, IP6} AddrType;
      static const SdpContents Empty;

      class Session;

      class Session
      {
         public:
            class Medium;

            class Codec
            {
               public:
                  Codec() : mName(), mRate(0), mPayloadType(-1) {}
                  Codec(const Data& name, unsigned long rate, const Data& parameters = Data::Empty, const Data& encodingParameters = Data::Empty);
                  Codec(const Data& name, int payloadType, int rate=8000);
                  Codec(const Codec& rhs);
                  Codec& operator=(const Codec& codec);

                  void parse(ParseBuffer& pb,
                             const SdpContents::Session::Medium& medium,
                             int payLoadType);

                  const Data& getName() const;
                  int getRate() const;

                  int payloadType() const {return mPayloadType;}
                  int& payloadType() {return mPayloadType;}

                  const Data& parameters() const {return mParameters;}
                  Data& parameters() {return mParameters;}

                  const Data& encodingParameters() const {return mEncodingParameters;}
                  Data& encodingParameters() {return mEncodingParameters;}

                  static const Codec ULaw_8000;
                  static const Codec ALaw_8000;
                  static const Codec G729_8000;
                  static const Codec G723_8000;
                  static const Codec GSM_8000;
                  static const Codec TelephoneEvent;
                  static const Codec FrfDialedDigit;
                  static const Codec CN;

                  typedef HashMap<int, Codec> CodecMap;
                  // "static" payload types as defined in RFC 3551.
                  // Maps payload type (number) to Codec definition.
                  static CodecMap& getStaticCodecs();

                  friend bool operator==(const Codec&, const Codec&);

               private:
                  Data mName;
                  unsigned long mRate;
                  int mPayloadType;
                  Data mParameters;  // Format parameters
                  Data mEncodingParameters;

                  static std::auto_ptr<CodecMap> sStaticCodecs;
                  static bool sStaticCodecsCreated;
                  friend std::ostream& operator<<(std::ostream&, const Codec&);
            };

            class Origin
            {
               public:
                  Origin(const Data& user,
                         const UInt64& sessionId,
                         const UInt64& version,
                         AddrType addr,
                         const Data& address);
                  Origin(const Origin& rhs);
                  Origin& operator=(const Origin& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  const UInt64& getSessionId() const {return mSessionId;}
                  UInt64& getSessionId() { return mSessionId; }

                  const UInt64& getVersion() const {return mVersion;}
                  UInt64& getVersion() { return mVersion; }
                  const Data& user() const {return mUser;}
                  Data& user() {return mUser;}
                  AddrType getAddressType() const {return mAddrType;}
                  const Data& getAddress() const {return mAddress;}
                  void setAddress(const Data& host, AddrType type = IP4);

               private:
                  Origin();

                  Data mUser;
                  UInt64 mSessionId;
                  UInt64 mVersion;
                  AddrType mAddrType;
                  Data mAddress;

                  friend class Session;
            };

            class Email
            {
               public:
                  Email(const Data& address,
                        const Data& freeText);

                  Email(const Email& rhs);
                  Email& operator=(const Email& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  const Data& getAddress() const {return mAddress;}
                  const Data& getFreeText() const {return mFreeText;}

               private:
                  Email() {}

                  Data mAddress;
                  Data mFreeText;

                  friend class Session;
            };

            class Phone
            {
               public:
                  Phone(const Data& number,
                        const Data& freeText);
                  Phone(const Phone& rhs);
                  Phone& operator=(const Phone& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  const Data& getNumber() const {return mNumber;}
                  const Data& getFreeText() const {return mFreeText;}

               private:
                  Phone() {}

                  Data mNumber;
                  Data mFreeText;

                  friend class Session;
            };

            class Connection
            {
               public:
                  Connection(AddrType addType,
                             const Data& address,
                             unsigned long ttl = 0);
                  Connection(const Connection& rhs);
                  Connection& operator=(const Connection& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  AddrType getAddressType() const {return mAddrType;}
                  const Data& getAddress() const {return mAddress;}
                  void setAddress(const Data& host, AddrType type = IP4);
                  unsigned long ttl() const {return mTTL;}
                  unsigned long& ttl() {return mTTL;}

               private:
                  Connection();

                  AddrType mAddrType;
                  Data mAddress;
                  unsigned long mTTL;

                  friend class Session;
                  friend class Medium;
            };

            class Bandwidth
            {
               public:
                  Bandwidth(const Data& modifier,
                            unsigned long kbPerSecond);
                  Bandwidth(const Bandwidth& rhs);
                  Bandwidth& operator=(const Bandwidth& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  const Data& modifier() const {return mModifier;}
                  Data modifier() {return mModifier;}
                  unsigned long kbPerSecond() const {return mKbPerSecond;}
                  unsigned long& kbPerSecond() {return mKbPerSecond;}

               private:
                  Bandwidth() {}
                  Data mModifier;
                  unsigned long mKbPerSecond;

                  friend class Session;
                  friend class Medium;
            };

            class Time
            {
               public:
                  Time(unsigned long start,
                       unsigned long stop);
                  Time(const Time& rhs);
                  Time& operator=(const Time& rhs);

                  void parse(ParseBuffer& pb);
                  std::ostream& encode(std::ostream&) const;

                  class Repeat
                  {
                     public:
                        Repeat(unsigned long interval,
                               unsigned long duration,
                               std::list<int> offsets);
                        void parse(ParseBuffer& pb);
                        std::ostream& encode(std::ostream&) const;

                        unsigned long getInterval() const {return mInterval;}
                        unsigned long getDuration() const {return mDuration;}
                        const std::list<int> getOffsets() const {return mOffsets;}

                     private:
                        Repeat() {}
                        unsigned long mInterval;
                        unsigned long mDuration;
                        std::list<int> mOffsets;

                        friend class Time;
                  };

                  void addRepeat(const Repeat& repeat);

                  unsigned long getStart() const {return mStart;}
                  unsigned long getStop() const {return mStop;}
                  const std::list<Repeat>& getRepeats() const {return mRepeats;}

               private:
                  Time() {}
                  unsigned long mStart;
                  unsigned long mStop;
                  std::list<Repeat> mRepeats;

                  friend class Session;
            };

            class Timezones
            {
               public: