Method JSockAddr

jalib/jsocket.cpp:46–151

const jalib::JSockAddr jalib::JSockAddr::ANY(NULL);

jalib::JSockAddr::JSockAddr(const char *hostname /* == NULL*/,
                            int port /* == -1*/)
{
  // Initialization for any case
  memset((void *)&_addr, 0, sizeof(_addr));
  for (unsigned int i = 0; i < (max_count + 1); i++) {
    _addr[i].sin_family = AF_INET;
  }
  _count = 0;

  if (hostname == NULL) {
    _count = 1;
    _addr[0].sin_addr.s_addr = INADDR_ANY;
    if (port != -1) {
      _addr[0].sin_port = htons(port);
    }
    return;
  }

#if 0
  struct hostent ret, *result;
  char buf[1024];
  int h_errnop;

  int res =
    gethostbyname_r(hostname, &ret, buf, sizeof buf, &result, &h_errnop);

  // Fall back to gethostbyname on error
  if (res != 0) {
    JWARNING(false) (hostname) (hstrerror(h_errno))
    .Text("gethostbyname_r failed, calling gethostbyname");
    result = gethostbyname(hostname);
  }

  JWARNING(result != NULL) (hostname).Text("No such host");

  if (result != NULL) {
    JASSERT((int)sizeof(_addr.sin_addr.s_addr) <= result->h_length)
      (sizeof(_addr.sin_addr.s_addr)) (result->h_length);

    memcpy(&_addr.sin_addr.s_addr, result->h_addr, result->h_length);
    if (port != -1) {
      _addr.sin_port = htons(port);
    }
  } else { // else (hostname, port) not valid; poison the port number
    JASSERT(typeid(_addr.sin_port) == typeid(in_port_t));
    _addr.sin_port = (in_port_t)-2;
  }
#else // if 0
  struct addrinfo hints;
  struct addrinfo *res;
  memset(&hints, '\0', sizeof hints);
  hints.ai_family = AF_INET;
  hints.ai_socktype = SOCK_STREAM;
  hints.ai_flags = AI_ADDRCONFIG;

  /* FIXME: Ulrich Drepper states the following about getaddrinfo():
   *   The most important thing when using getaddrinfo is to make sure that all