Assignment3Part1

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

int main(int argc,char **argv)
{
  int MAXSOCK = 99999;
  int error;
  int nsock;
  int s[MAXSOCK];
  int porty = atoi(argv[1]);
  const char *cause = NULL;
  struct addrinfo hints, *res, *res0;
  memset(&hints, 0, sizeof(hints));
  hints.ai_family = AF_INET;
  hints.ai_socktype= SOCK_STREAM;
  error = getaddrinfo(NULL, argv[1], &hints, &res0);
  if (error)
  {
    errx(1, "%s", gai_strerror(error)); /* NOTREACHED */
  }
  nsock = 0;
  for (res = res0; res	&& nsock < MAXSOCK; res	= res->ai_next)
  {
    s[nsock] = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
  	if (s[nsock]	< 0)
    {
      cause = "socket";
      continue;
    }
    if (bind(s[nsock], res->ai_addr, res->ai_addrlen) < 0)
    {
      cause = "bind";
      close(s[nsock]);
      continue;
    }
    (void) listen(s[nsock], 5);
    nsock++;
  }
  if (nsock ==	0)
  {
    err(1, "%s",	cause);/* NOTREACHED */
  }
  freeaddrinfo(res0);
	return 0;;
}