Function all_supported_features

common/features.c:392–409

* all_supported_features - Check if we support what's being asked * * Given the features vector that the remote connection is expecting * from us, we check to see if we support all even bit features, i.e., * the required features. * * @bitmap: the features bitmap the peer is asking for * * Returns -1 on success, or first unsupported feature. */

 * Returns -1 on success, or first unsupported feature.
 */
static int all_supported_features(const struct feature_set *our_features,
				  const u8 *bitmap,
				  enum feature_place p)
{
	size_t len = tal_count(bitmap) * 8;

	/* It's OK to be odd: only check even bits. */
	for (size_t bitnum = 0; bitnum < len; bitnum += 2) {
		if (!test_bit(bitmap, bitnum/8, bitnum%8))
			continue;

		if (feature_offered(our_features->bits[p], bitnum))
			continue;

		return bitnum;
	}
	return -1;
}

int features_unsupported(const struct feature_set *our_features,
			 const u8 *their_features,