Function update_ipv4_header

dpdk/lib/gso/gso_common.h:102–111

* Internal function which updates the IPv4 header of a packet, following * segmentation. This is required to update the header's 'total_length' field, * to reflect the reduced length of the now-segmented packet. Furthermore, the * header's 'packet_id' field must be updated to reflect the new ID of the * now-segmented packet. * * @param pkt * The packet containing the IPv4 header. * @param

 *  The new ID of the packet.
 */
static inline void
update_ipv4_header(struct rte_mbuf *pkt, uint16_t l3_offset, uint16_t id)
{
	struct rte_ipv4_hdr *ipv4_hdr;

	ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
			l3_offset);
	ipv4_hdr->total_length = rte_cpu_to_be_16(pkt->pkt_len - l3_offset);
	ipv4_hdr->packet_id = rte_cpu_to_be_16(id);
}

/**
 * Internal function which divides the input packet into small segments.