c-client.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

void error(const char *msg) {
  perror(msg);
  exit(0);
}

int main(int argc, char *argv[]) {
  int sockfd, portno, n;
  struct sockaddr_in serv_addr;
  struct hostent *server;
  
  char buffer[256];

  // get the current time
  long ts = time(0);
  for (int i = 0; i <= 1000; i++) {
    portno = 2003;
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) 
      error("ERROR opening socket");
    server = gethostbyname("relay-vip.phl.corp.theplatform.com");
    if (server == NULL) {
      fprintf(stderr,"ERROR, no such host\n");
      exit(0);
    }
    bzero((char *) &serv_addr, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    bcopy((char *)server->h_addr, 
	  (char *)&serv_addr.sin_addr.s_addr,
	  server->h_length);
    serv_addr.sin_port = htons(portno);
    if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) 
      error("ERROR connecting");
    bzero(buffer,256);
    sprintf(buffer, "10s.phl.fuzzy.c-client 1 %ld\n", ts);
    fprintf(stderr, "%s", buffer);
    n = write(sockfd,buffer,strlen(buffer));
    if (n < 0) 
      error("ERROR writing to socket");
    bzero(buffer,256);
    n = read(sockfd,buffer,255);
    if (n < 0) 
      error("ERROR reading from socket");
    close(sockfd);
    sleep(2);
    ts = (ts - 10);
  }
  return 0;
}