tcpclient.c

tcp/Ip的程序

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


int port=8000;


int main(int argc ,char *argv[])
{
  struct sockaddr_in pin;
  int    mysock;
  char   buf[8192];
  char  *str="A000001 tv 20.00";
  if(argc<2){
   printf("shiyongfangfa: client\n");
   printf("shiyongmoren\n");
  }else{
    str=argv[1];
    }

    /*new  IPV4*/
     bzero(&pin,sizeof(pin));
     pin.sin_family = AF_INET;
     pin.sin_addr.s_addr = inet_addr("192.168.0.100");
     pin.sin_port = htons(port);

   /*new  socket*/
    mysock= socket(AF_INET,SOCK_STREAM,0);
    if(mysock == -1)
     {
      perror("call to socket");
      exit(1);
     }
    
      if (connect(mysock,(void *)&pin,sizeof(pin))<0)
          {
               perror("call to connect"); 
                   exit(1);
          }

        printf("Sending message %s to server ...\n",str);
          if (send(mysock,str,strlen(str),0) == -1) {
             perror("error in send");
                exit(1);
                 }

      if (recv(mysock, buf, 8192,0)  ==-1) {
                 perror("error in receive");
                   exit(1);
                    
                                    }
printf("from server\n\n%s\n",buf);
    /* if (send(mysock,str,strlen(str),0) == -1) {
             perror("error in send");
                exit(1);
                 }

     if (recv(mysock, buf, 8192,0)  ==-1) {
                 perror("error in receive");
                   exit(1);
                    
                                    }
                
                    printf("from server\n\n%s\n",buf);*/
                close(mysock);
                   return 0;
}