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| | |
| | | /********** |
| | | This library is free software; you can redistribute it and/or modify it under |
| | | the terms of the GNU Lesser General Public License as published by the |
| | | Free Software Foundation; either version 3 of the License, or (at your |
| | | option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.) |
| | | |
| | | This library is distributed in the hope that it will be useful, but WITHOUT |
| | | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| | | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for |
| | | more details. |
| | | |
| | | You should have received a copy of the GNU Lesser General Public License |
| | | along with this library; if not, write to the Free Software Foundation, Inc., |
| | | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | | **********/ |
| | | // "mTunnel" multicast access service |
| | | // Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved. |
| | | // Network Addresses |
| | | // C++ header |
| | | |
| | | #ifndef _NET_ADDRESS_HH |
| | | #define _NET_ADDRESS_HH |
| | | |
| | | #ifndef _HASH_TABLE_HH |
| | | #include "HashTable.hh" |
| | | #endif |
| | | |
| | | #ifndef _NET_COMMON_H |
| | | #include "NetCommon.h" |
| | | #endif |
| | | |
| | | #ifndef _USAGE_ENVIRONMENT_HH |
| | | #include "UsageEnvironment.hh" |
| | | #endif |
| | | |
| | | // Definition of a type representing a low-level network address. |
| | | // At present, this is 32-bits, for IPv4. Later, generalize it, |
| | | // to allow for IPv6. |
| | | typedef u_int32_t netAddressBits; |
| | | |
| | | class NetAddress { |
| | | public: |
| | | NetAddress(u_int8_t const* data, |
| | | unsigned length = 4 /* default: 32 bits */); |
| | | NetAddress(unsigned length = 4); // sets address data to all-zeros |
| | | NetAddress(NetAddress const& orig); |
| | | NetAddress& operator=(NetAddress const& rightSide); |
| | | virtual ~NetAddress(); |
| | | |
| | | unsigned length() const { return fLength; } |
| | | u_int8_t const* data() const // always in network byte order |
| | | { return fData; } |
| | | |
| | | private: |
| | | void assign(u_int8_t const* data, unsigned length); |
| | | void clean(); |
| | | |
| | | unsigned fLength; |
| | | u_int8_t* fData; |
| | | }; |
| | | |
| | | class NetAddressList { |
| | | public: |
| | | NetAddressList(char const* hostname); |
| | | NetAddressList(NetAddressList const& orig); |
| | | NetAddressList& operator=(NetAddressList const& rightSide); |
| | | virtual ~NetAddressList(); |
| | | |
| | | unsigned numAddresses() const { return fNumAddresses; } |
| | | |
| | | NetAddress const* firstAddress() const; |
| | | |
| | | // Used to iterate through the addresses in a list: |
| | | class Iterator { |
| | | public: |
| | | Iterator(NetAddressList const& addressList); |
| | | NetAddress const* nextAddress(); // NULL iff none |
| | | private: |
| | | NetAddressList const& fAddressList; |
| | | unsigned fNextIndex; |
| | | }; |
| | | |
| | | private: |
| | | void assign(netAddressBits numAddresses, NetAddress** addressArray); |
| | | void clean(); |
| | | |
| | | friend class Iterator; |
| | | unsigned fNumAddresses; |
| | | NetAddress** fAddressArray; |
| | | }; |
| | | |
| | | typedef u_int16_t portNumBits; |
| | | |
| | | class Port { |
| | | public: |
| | | Port(portNumBits num /* in host byte order */); |
| | | |
| | | portNumBits num() const { return fPortNum; } // in network byte order |
| | | |
| | | private: |
| | | portNumBits fPortNum; // stored in network byte order |
| | | #ifdef IRIX |
| | | portNumBits filler; // hack to overcome a bug in IRIX C++ compiler |
| | | #endif |
| | | }; |
| | | |
| | | UsageEnvironment& operator<<(UsageEnvironment& s, const Port& p); |
| | | |
| | | |
| | | // A generic table for looking up objects by (address1, address2, port) |
| | | class AddressPortLookupTable { |
| | | public: |
| | | AddressPortLookupTable(); |
| | | virtual ~AddressPortLookupTable(); |
| | | |
| | | void* Add(netAddressBits address1, netAddressBits address2, Port port, void* value); |
| | | // Returns the old value if different, otherwise 0 |
| | | Boolean Remove(netAddressBits address1, netAddressBits address2, Port port); |
| | | void* Lookup(netAddressBits address1, netAddressBits address2, Port port); |
| | | // Returns 0 if not found |
| | | void* RemoveNext() { return fTable->RemoveNext(); } |
| | | |
| | | // Used to iterate through the entries in the table |
| | | class Iterator { |
| | | public: |
| | | Iterator(AddressPortLookupTable& table); |
| | | virtual ~Iterator(); |
| | | |
| | | void* next(); // NULL iff none |
| | | |
| | | private: |
| | | HashTable::Iterator* fIter; |
| | | }; |
| | | |
| | | private: |
| | | friend class Iterator; |
| | | HashTable* fTable; |
| | | }; |
| | | |
| | | |
| | | Boolean IsMulticastAddress(netAddressBits address); |
| | | |
| | | |
| | | // A mechanism for displaying an IPv4 address in ASCII. This is intended to replace "inet_ntoa()", which is not thread-safe. |
| | | class AddressString { |
| | | public: |
| | | AddressString(struct sockaddr_in const& addr); |
| | | AddressString(struct in_addr const& addr); |
| | | AddressString(netAddressBits addr); // "addr" is assumed to be in host byte order here |
| | | |
| | | virtual ~AddressString(); |
| | | |
| | | char const* val() const { return fVal; } |
| | | |
| | | private: |
| | | void init(netAddressBits addr); // used to implement each of the constructors |
| | | |
| | | private: |
| | | char* fVal; // The result ASCII string: allocated by the constructor; deleted by the destructor |
| | | }; |
| | | |
| | | #endif |