/* udpsource.c   by Michael Thorpe   2000-11-20 */

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

int main(int argc,char **argv) {
   int i,l,s;
   struct hostent *he;
   struct sockaddr_in sa;
   char *buf;

   if(argc != 4) {
      fprintf(stderr,"usage: %s <host> <port> <packetsize>\n",argv[0]);
      return(1);
   }
   l=atoi(argv[3]);
   buf=(char *)malloc(l);
   if(!buf) {
      perror("malloc");
      return(-1);
   }
   for(i=0;i<l;i++)
      buf[i]=rand();
   if(!(he=gethostbyname(argv[1]))) {
      perror("gethostbyname");
      return(1);
   }
   bzero(&sa,sizeof(sa));
   bcopy(he->h_addr,(char *)&sa.sin_addr,he->h_length);
   sa.sin_family=he->h_addrtype;
   sa.sin_port=htons(atoi(argv[2]));
   s=socket(AF_INET,SOCK_DGRAM,0);
   if(s<0) {
      perror("socket");
      return(-1);
   }
   if(0>connect(s,(struct sockaddr *)&sa,sizeof(sa))) {
      perror("connect");
      return(-1);
   }
   while(1) {
      i=write(s,buf,l);
      if(i<0) {
         perror("write");
         return(-1);
      }
/*
      printf("Wrote %d bytes\n",i);
*/
   }
   return(-1);
}