28 GroupSock(NetAddress)——live555源码阅读(四)网络

my.oschina.net/oloroso

简介

IP

port

//Definitionofatyperepresentingalow-levelnetworkaddress.//Atpresent,thisis32-bits,forIPv4.Later,generalizeit,//toallowforIPv6.//一种代表底层网络地址定义。目前，默认它32位，IPv4。将来，可扩展支持IPv6。typedefu_int32_tnetAddressBits;typedefu_int16_tportNumBits;

live555sourcecontrol\groupsock\include\NetAddress.hh

1)NetAddress网络地址类简述

NetAddress

structsockaddr

u_int8_t*fData

unsignedfLength

//构造函数，为fDate申请length字节内存空间，并将data指向内容拷贝到新空间NetAddress::NetAddress(u_int8_tconst*data,unsignedlength){assign(data,length);}//为fDate申请length字节内存空间，并将新空间清零NetAddress::NetAddress(unsignedlength){fData=newu_int8_t[length];if(fData==NULL){fLength=0;return;}for(unsignedi=0;i<length;++i)fData[i]=0;fLength=length;}//拷贝构造NetAddress::NetAddress(NetAddressconst&orig){assign(orig.data(),orig.length());}

clean方法(清理)与析构

clean

fData

NetAddress

数据给清理掉

private

//清除地址数据voidNetAddress::clean(){delete[]fData;fData=NULL;fLength=0;}

//析构NetAddress::~NetAddress(){clean();}

operate=重载赋值操作

//重载=赋值NetAddress&NetAddress::operator=(NetAddressconst&rightSide){if(&rightSide!=this){clean();assign(rightSide.data(),rightSide.length());}return*this;}