linux下C++SocketTCP编程---客户端

#ifndef NETCLIENT_H_
#define NETCLIENT_H_
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <resolv.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <iostream>
using namespace std;
class NetClient {
public:
NetClient();
virtual ~NetClient();
void RevHello(char* str,int para[]);
void SendHi();
void CreateConnect();
void CheckConnect();
void MyTest();
protected:
void ConnectServer();
bool CheckBuff(char* str,int num);
void HandlePacket();
void DividePacket(char* str);
void HandlePacketHead(char** str,int param[]);
void SendPacket(string strInfo);
private:
#define MAXBUF 1024
int sockfd;
struct sockaddr_in serverAddr;
bool connectFlag;
};
#endif /* NETCLIENT_H_ */

#include "NetClient.h"

#define defPort 7788   //ssh服务的端口号：22
char defIP[]="127.0.0.1";
NetClient::NetClient()
{
}
NetClient::~NetClient()
{
close(sockfd);
}
void NetClient::CreateConnect()
{
if((sockfd=socket(AF_INET,SOCK_STREAM,0))==0)
{
printf("create socket errno：%d, errerInfo：%s\n",errno,strerror(errno));
exit(1);
}
else
printf("socket created sucessfully\n");

bzero(&serverAddr,sizeof(serverAddr));
serverAddr.sin_family=AF_INET;
serverAddr.sin_port=htons(defPort);
serverAddr.sin_addr.s_addr=inet_addr(defIP);

connectFlag=false;
int b_on = 1;
ioctl (sockfd, FIONBIO, &b_on);

//设置socket属性为非阻塞方式
//	if(fcntl(sockfd,F_SETFL,O_NONBLOCK)==-1)
//		printf("fcntl errno：%d, errerInfo：%s\n",errno,strerror(errno));
}
void NetClient::CheckConnect()
{
if(connectFlag)
HandlePacket();
else
ConnectServer();
}
void NetClient::ConnectServer()
{
if(connect(sockfd,(struct sockaddr*)&serverAddr,sizeof(serverAddr))!=0)
{
connectFlag=false;
printf("connect erron：%d, errerInfo：%s\n",errno,strerror(errno));
}
else
{
connectFlag=true;
printf("client connect to server successfully\n\n\n");
int b_on = 1;
ioctl (sockfd, FIONBIO, &b_on);
}
}
void NetClient::HandlePacket()
{
char buffer[MAXBUF];
bzero(buffer,MAXBUF);
int ret=recv(sockfd,buffer,sizeof(buffer),0);
if(ret!=-1)
{
if(CheckBuff(buffer,ret))
DividePacket(buffer);
else
cout<<"\""<<buffer<<"\""<<" has illegal data!!!"<<endl;
}
else
cout<<"recv erron="<<errno<<"  errorInfo:"<<strerror(errno)<<endl;
}
bool NetClient::CheckBuff(char* str,int num)
{
//合法字符只有空格(32)，_ (95)小写字母(97~122)和数字(48~57)
for(int i=32;i<num;i++)
{
if(str[i]==32||str[i]==95)
continue;
else if(str[i]>=97&&str[i]<=122)
continue;
else if(str[i]>=48&&str[i]<=57)
continue;
else
return false;
}
return true;
}
void NetClient::DividePacket(char* str)
{
char* strHead[10];
int paraList[10][10];
for(int i=0;i<10;i++)
{
strHead[i]=NULL;
for(int j=0;j<10;j++)
paraList[i][j]='|';
}
char* subStr=strtok(str," ");
int i=0,j=0;
while(subStr!=NULL)
{
if(*subStr>=48 && *subStr<=57)
{
paraList[i-1][j]=atoi(subStr);
j++;
}
else
{
strHead[i]=subStr;
i++;
j=0;
}
subStr=strtok(NULL," ");
}
for(int i=0;i<10;i++)
{
if(strHead[i])
HandlePacketHead(strHead+i,paraList[i]);
}
}
void NetClient::HandlePacketHead(char** str,int param[])
{
if(strcmp(*str,"hello")==0)
{
RevHello(*str,param);
}
else if(strcmp(*str,"women")==0)
{
cout<<"hellotoo"<<param[0]<<endl;
SendPacket("thankyou 9809");
}
else
{
cout<<"no matched Info: "<<*str<<"    para: "<<*param<<endl;
}
}
void NetClient::SendPacket(string strInfo)
{
char buffer[MAXBUF];
bzero(buffer,MAXBUF);
strcpy(buffer,strInfo.data());
int len=send(sockfd,buffer,strlen(buffer),0);
if(len==-1)
printf("send errno=%d,errerInfo: %s\n",errno,strerror(errno));
else
printf("send successful: '%s' ,InfoLen=%d\n",buffer,len);
}
void NetClient::RevHello(char* str,int para[])
{
cout<<"rev "<<str<<" ";
for(int i=0;i<10;i++)
{
if(para[i]!='|')
cout<<para[i]<<" ";
else
cout<<" -!-"<<para[i];
}
cout<<endl;
cout<<"I rev info"<<endl;
}
void NetClient::SendHi()
{
SendPacket("hello 1989 7812 hex 85");
}

void NetClient::MyTest()
{
//初始化服务器端的ip和端口信息
bzero(&serverAddr,sizeof(serverAddr));
serverAddr.sin_family=AF_INET;
serverAddr.sin_port=htons(defPort);

//本地IP地址 转换成 网络ip
//serverAddr.sin_addr.s_addr=inet_addr(defIP);
serverAddr.sin_addr.s_addr=htonl(INADDR_ANY);
cout<<"internet IP: "<<serverAddr.sin_addr.s_addr<<endl;
cout<<"internet port: "<<serverAddr.sin_port<<"  ntohs"<<ntohs(serverAddr.sin_port)<<endl;
if(inet_aton(defIP,(struct in_addr*)&serverAddr.sin_addr.s_addr)==0)
printf("inet_aton errno：%d, errerInfo：%s\n",errno,strerror(errno));

cout<<"123internet IP: "<<serverAddr.sin_addr.s_addr<<endl;
cout<<"IP: "<<inet_ntoa(serverAddr.sin_addr)<<endl;
}
int main()
{
NetClient NC;
//NC.MyTest();
NC.CreateConnect();
while(1)
{
sleep(2);
NC.CheckConnect();
sleep(2);
NC.SendHi();
}
return 0;
}