server.cpp

unix环境下socket编程服务器端示例。开发环境：gcc、vim。在linux和solaris上测试通过

#include <iostream>
#include <string>
#include <string.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>

using namespace std;
int main()
{
  int sockfd,i1,sockfd1;
  socklen_t i2;
  sockaddr_in addr,addr1;
  string s1;
  char c1[128+1];


  sockfd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
  if(sockfd==-1)
  {
    return 0;
  } 

  addr.sin_family=AF_INET;
  addr.sin_port=htons(7676);
  if(inet_pton(AF_INET,"192.168.0.2A8",&(addr.sin_addr))==0)
  {
    struct hostent *he;
    he = gethostbyname("ntong-ln");
    if (!he)
    {
      exit(2);
    }
    memcpy(&addr.sin_addr, he->h_addr_list[0], he->h_length);
  }

  i1=bind(sockfd,(sockaddr*)&addr,sizeof(addr));
  if(i1==-1)
  {
    return 0;
  } 

  i1=listen(sockfd,5);
  if(i1==-1)
  {
    return 0;
  } 

  i2=sizeof(addr1);
  sockfd1=accept(sockfd,(sockaddr*)&addr1,&i2);
  if(sockfd1==-1)
  {
    return 0;
  } 

  //发送
  s1="hello client";
  i1=send(sockfd1,s1.c_str(),s1.size(),0);
  if(i1==-1)
  {
    return 0;
  } 


  //接收
  i1=recv(sockfd1,c1,128,0);
  if(i1==-1)
  {
    return 0;
  } 
  c1[i1]='\0';
  s1=c1;
  cout<<s1<<endl; 


  close(sockfd);
  return 0;
}