#include <stdio.h>
int main(int argc, char *argv[])
{
char *POPMessage[]={"USER sun\r\n","PASS 123456\r\n","STAT\r\n","RETR 1\r\n",NULL};
char buf[1024];
int sockfd,new_fd,iLength;
struct sockaddr_in server_addr;
//struct sockaddr_in client_addr;
//int sin_size;
int iMsg=0;
if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1){
perror(" socket error");exit(1);
}
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(110);
server_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
bzero(&(server_addr.sin_zero),8);
if(connect(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr))==-1){
perror(" connect error");exit(1);
}
iLength=recv(sockfd,buf,sizeof(buf),0);
buf[iLength]='\0';
printf("received:%s\n",buf);
do
{
send(sockfd,POPMessage[iMsg],strlen(POPMessage[iMsg]),0);
printf("have sent:%s",POPMessage[iMsg]);
iLength=recv(sockfd,buf,sizeof(buf),0);
buf[iLength]='\0';
iMsg++;
printf("receive:%s,%d\n",buf,iMsg);
}while(POPMessage[iMsg]);
close(sockfd);
}
}
