ObjFW  Diff

	     exception: (id)exception;
@end

static OFString *
domainFromHostname(void)
{
	char hostname[256];
	char *domain;
	OFString *domain;

	if (gethostname(hostname, 256) != 0)
		return nil;

	domain = [OFString stringWithCString: hostname
				    encoding: [OFLocale encoding]];
	if ((domain = strchr(hostname, '.')) == NULL)

	@try {
		of_socket_address_parse_ip(domain, 0);

		/*
		 * If we are still here, the host name is a valid IP address.
		 * We can't use that as local domain.
		 */
		return nil;
	} @catch (OFInvalidFormatException *e) {
		/* Not an IP address -> we can use it if it contains a dot. */
		size_t pos = [domain rangeOfString: @"."].location;

		if (pos == OF_NOT_FOUND)
	return [OFString stringWithCString: domain + 1
				  encoding: [OFLocale encoding]];
			return nil;

		return [domain substringWithRange:
		    of_range(pos + 1, [domain length] - pos - 1)];
	}
}

static bool
isFQDN(OFString *host, OFDNSResolverSettings *settings)
{
	const char *UTF8String = [host UTF8String];
	size_t length = [host UTF8StringLength];