Function rte_ipv6_get_next_ext

dpdk/lib/net/rte_ip.h:812–840

* Parse next IPv6 header extension * * This function checks if proto number is an IPv6 extensions and parses its * data if so, providing information on next header and extension length. * * @param p * Pointer to an extension raw data. * @param proto * Protocol number extracted from the "next header" field from * the IPv6 header or the previous extension. * @param ext_len * Exten

 *   next protocol number if proto is an IPv6 extension, -EINVAL otherwise
 */
static inline int
rte_ipv6_get_next_ext(const uint8_t *p, int proto, size_t *ext_len)
{
	int next_proto;

	switch (proto) {
	case IPPROTO_AH:
		next_proto = *p++;
		*ext_len = (*p + 2) * sizeof(uint32_t);
		break;

	case IPPROTO_HOPOPTS:
	case IPPROTO_ROUTING:
	case IPPROTO_DSTOPTS:
		next_proto = *p++;
		*ext_len = (*p + 1) * sizeof(uint64_t);
		break;

	case IPPROTO_FRAGMENT:
		next_proto = *p;
		*ext_len = RTE_IPV6_FRAG_HDR_SIZE;
		break;

	default:
		return -EINVAL;
	}

	return next_proto;
}

#ifdef __cplusplus
}