Soma

/* My dumb client -- just an illustration */

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

const int BUFSIZE=500;

int MakeSocket(char *host, int portnum) {
   int s;          
   int len;   
   struct sockaddr_in sa; 
   struct hostent *hp;
   struct servent *sp;
   int *ppointer;
   ppointer = &portnum;
   int ret;

   if((hp = gethostbyname(host)) == 0)
      perror("In gethostbyname");
   bcopy((char *)hp->h_addr, (char *)&sa.sin_addr, hp->h_length);
   sa.sin_family = hp->h_addrtype;

   if (portnum > 0) {
      sa.sin_port = htons(portnum);
   }
   else {
      cout << "this one won't take a 'telnet' style port" << endl;
      //sp=getservbyname(port, "tcp");
      //portnum = sp->s_port;
      //sa.sin_port = sp->s_port;
   }
   if((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0)
      perror("Making Socket");
   ret = connect(s, (struct sockaddr *)&sa, sizeof(sa));
   if(ret < 0)
      {
      //perror("Couldn't Connect Socket");
      return 0;
      }
   else
      {
//      cout << "Connect to host " << host  << " port " << port << endl;
      return s;
      }
}

int main(int argc, char *argv[]) {


   int s;          // socket descriptor
   int len;      // length of reveived data
   char buf[BUFSIZE];   // buffer in which to read
   int ret;      // return code from various system calls
   for(int i = 1; i < 50; i++)
      {
      s = MakeSocket(argv[1], i);
      if (s > 0) {
         cout << "Open port: " << i << " descriptor: " << s << endl;
         }
      close(s);
      }
   }
   

/* 
   
      //cin.getline(buf,BUFSIZE);
      
      cout << "File to read (no spaces for now):";
      cin >> buf;
      cout << "Opening: " << buf << endl;
      //write(1, buf, strlen(buf)+1);
      len = write(s, buf, strlen(buf)+1);
      if(len < 0)
         perror("Writing to server");
         
      if((len = read(s, buf, BUFSIZE-1)) < 0)
         perror("On first read");
      int count = len;
      while(len > 0){
         //cout << buf;
         write(1, buf, len);
         len = read(s, buf, BUFSIZE-1);
         
         count += len;
         }
      write(s, "goodbye", strlen("goodbye"));   
      cout << "Read a total of " << count << " bytes." << endl;
      
   
}


*/