linux下C++SocketTCP编程---服务器端

NetServer.h

 #ifndef NETSERVER_H_
 #define NETSERVER_H_

 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include <unistd.h>
 #include <arpa/inet.h>
 #include <sys/ioctl.h>
 #include <iostream>
 using namespace std;
 class NetServer {
 public:
     NetServer();
     virtual ~NetServer();
     void CreateConnect();
     void CheckConnect();
     void RevHello(char* str,int para[]);
     void SendHelloToo();
 protected:
     void AcceptConnect();
     void HandlePacket();
     bool CheckBuff(char* str,int num);
     void DividePacket(char* str);
     void HandlePacketHead(char** str,int param[]);
     void SendPacket(string str);
 private:
 #define MAXBUF 1024
     char buff[MAXBUF];
     int sockfd,clientfd;
     sockaddr_in clientAddr;
     socklen_t len;
     bool connectFlag;
 };
 #endif /* NETSERVER_H_ */

NetServer.cpp

 #include "NetServer.h"

 #define defPort 7788
 NetServer::NetServer()
 {
 }
 NetServer::~NetServer()
 {
     close(sockfd);
 }
 void NetServer::CreateConnect()
 {
     sockaddr_in serverAddr;
     connectFlag=false;
     if((sockfd=socket(PF_INET,SOCK_STREAM,0))==-1)
     {
         printf("socket created failly,errno=%d,errorInfo: %s\n",errno,strerror(errno));
         exit(1);
     }
     else
         printf("socket created successfully\n");

     bzero(&serverAddr,sizeof(serverAddr));
     serverAddr.sin_family=PF_INET;
     serverAddr.sin_port=htons(defPort);
     serverAddr.sin_addr.s_addr=htonl(INADDR_ANY);

     if(bind(sockfd,(sockaddr*)&serverAddr,sizeof(sockaddr))==-1)
     {
         printf("bind failly,errno=%d,errorInfo: %s\n",errno,strerror(errno));
         exit(1);
     }
     else
         printf("bind successfully\n");
     if(listen(sockfd,10)==-1)
     {
         printf("listen failly,errno=%d,errorInfo: %s\n",errno,strerror(errno));
         exit(1);
     }
     else
         printf("listen successfully\n");

     len=sizeof(struct sockaddr);
     int b_on = 1;
     ioctl (sockfd, FIONBIO, &b_on);
 }
 void NetServer::CheckConnect()
 {
     if(connectFlag)
         HandlePacket();
     else
         AcceptConnect();
 }
 void NetServer::AcceptConnect()
 {
     clientfd=accept(sockfd,(sockaddr*)&clientAddr,&len);
     if(clientfd==-1)
     {
         connectFlag=false;
         printf("accept failly,errno=%d,errorInfo: %s\n",errno,strerror(errno));
     }
     else
     {
         connectFlag=true;
         printf("server:got connection from %s,port %d,socket %d\n",inet_ntoa(clientAddr.sin_addr),ntohs(clientAddr.sin_port), clientfd);
         long b_on = 1;
         ioctl (clientfd, FIONBIO, &b_on);
     }
 }
 void NetServer::HandlePacket()
 {
     char buff[MAXBUF];
     bzero(buff,MAXBUF);
     int res=recv(clientfd,buff,MAXBUF,0);
     if(res!=-1)
     {
         if(CheckBuff(buff,res))
             DividePacket(buff);
         else
             cout<<"\""<<buff<<"\""<<"  has illegal data!!!"<<endl;
     }
     else
         printf("recv failly,errno=%d,errorInfo: %s\n",errno,strerror(errno));
 }
 bool NetServer::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=0;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 NetServer::DividePacket(char* paraStr)
 {
     char* strPtr[10];
     int paraList[10][10];
     for(int i=0;i<10;i++)
     {
         strPtr[i]=NULL;
         for(int j=0;j<10;j++)
         {
             paraList[i][j]='|';
         }
     }
     char* subStr=strtok(paraStr," ");
     int i=0,j=0;
     while(subStr!=NULL)
     {
         if(*subStr>=48 && *subStr<=57)
         {
             paraList[i-1][j]=atoi(subStr);
             cout<<"subdata: "<<subStr<<" paraList["<<i<<"]["<<j<<"]="<<paraList[i-1][j]<<endl;
             j++;
         }
         else
         {
             strPtr[i]=subStr;
             i++;
             j=0;
         }
         subStr=strtok(NULL," ");
     }
     for(int i=0;i<10;i++)
     {
         if(strPtr[i])
         {
             HandlePacketHead(strPtr+i,paraList[i]);
         }
     }
 }
 void NetServer::HandlePacketHead(char** str,int param[])
 {
     if(strcmp(*str,"hello")==0)
     {
         RevHello(*str,param);
     }
     else if(strcmp(*str,"thankyou")==0)
     {
         cout<<"thankyou---------"<<param[0]<<endl;
     }
     else
     {
         cout<<"not useful info: "<<*str<<" para: "<<*param<<endl;
     }
 }
 void NetServer::RevHello(char* str,int para[])
 {
     cout<<"receive:   "<<str<<" ";
     for(int i=0;i<10;i++)
     {
         if(para[i]!='|')// '|'==124
             cout<<para[i]<<" ";
 //      else
 //          cout<<"!!!"<<para[i]<<" ";
     }
     cout<<endl;
     cout<<"\ntwo para="<<para[1]<<endl;
     if(para[0]==1989)
         SendHelloToo();
 }
 void NetServer::SendPacket(string str)
 {
     char buff[MAXBUF];
     bzero(buff,MAXBUF);
     strcpy(buff,str.data());
     int len=send(clientfd,buff,strlen(buff),0);
     if(len==-1)
         printf("send failly,errno=%d,errorInfo:%s",errno,strerror(errno));
     else
         printf("send successfully,InfoLen=%d,Info: '%s'.\n",len,buff);
 }
 void NetServer::SendHelloToo()
 {
     SendPacket("women 789");
 }
 int main()
 {
     NetServer NS;
     NS.CreateConnect();
     while(1)
     {
         NS.CheckConnect();
         sleep(2);
     }
     return 0;
 }