gistfile1

void
freeaddrinfo (struct addrinfo* info)
{
  free(info->ai_addr);
  free(info);
}

int
getaddrinfo (const char* host, const char* port, const struct addrinfo* hint, struct addrinfo** info)
{
  struct hostent* hp;
  struct protoent* pp;
  hp = gethostbyname(host);
  pp = getprotobyname(port);

  *info = (struct addrinfo*)malloc(sizeof(struct addrinfo));
  memcpy(*info, hint, sizeof(struct addrinfo));
  (*info)->ai_family = (hint->ai_family == AF_UNSPEC ? AF_INET : hint->ai_family);
  (*info)->ai_addrlen = sizeof(struct sockaddr_in);
  (*info)->ai_addr = (struct sockaddr*)malloc(sizeof(struct sockaddr_in));
  ((struct sockaddr_in*)(*info)->ai_addr)->sin_family = (hint->ai_family == AF_UNSPEC ? AF_INET : hint->ai_family);
  if (pp) ((struct sockaddr_in*)(*info)->ai_addr)->sin_port = pp->p_proto;
  else    ((struct sockaddr_in*)(*info)->ai_addr)->sin_port = htons(atol(port));
  ((struct sockaddr_in*)(*info)->ai_addr)->sin_addr.s_addr = ((struct in_addr *)(hp->h_addr))->s_addr;
  (*info)->ai_next = NULL;
  return 0;
}