static void
process_ipv4(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
{
/* Assume there is no ethernet header */
struct ipv4_hdr *pkt_hdr = rte_pktmbuf_mtod(pkt, struct ipv4_hdr *);
/* Get "More fragments" flag and fragment offset */
uint16_t frag_field = rte_be_to_cpu_16(pkt_hdr->fragment_offset);
uint16_t frag_offset = (uint16_t)(frag_field & IPV4_HDR_OFFSET_MASK);
uint16_t frag_flag = (uint16_t)(frag_field & IPV4_HDR_MF_FLAG);
/* If it is a fragmented packet, then try to reassemble */
if ((frag_flag == 0) && (frag_offset == 0))
p->tx_buf[p->tx_buf_count++] = pkt;
else {
struct rte_mbuf *mo;
struct rte_ip_frag_tbl *tbl = p->frag_tbl;
struct rte_ip_frag_death_row *dr = &p->death_row;
pkt->l3_len = sizeof(*pkt_hdr);
/* Process this fragment */
mo = rte_ipv4_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(),
pkt_hdr);
if (mo != NULL)
p->tx_buf[p->tx_buf_count++] = mo;
rte_ip_frag_free_death_row(&p->death_row, 3);
}
}
struct rte_mbuf *
ipv4_reassemble(lcore_conf_t *qconf, struct rte_mbuf *m,
struct ether_hdr **eth_hdr_pp,
struct ipv4_hdr **ip_hdr_pp)
{
struct ipv4_hdr *ip_hdr = *ip_hdr_pp;
struct rte_ip_frag_tbl *tbl;
struct rte_ip_frag_death_row *dr;
/* if it is a fragmented packet, then try to reassemble. */
if (rte_ipv4_frag_pkt_is_fragmented(ip_hdr)) {
struct rte_mbuf *mo;
tbl = qconf->frag_tbl;
dr = &qconf->death_row;
/* process this fragment. */
mo = rte_ipv4_frag_reassemble_packet(tbl, dr, m, rte_rdtsc(), ip_hdr);
if (mo == NULL)
/* no packet to send out. */
return NULL;
/* we have our packet reassembled. */
if (mo != m) {
m = mo;
*eth_hdr_pp = rte_pktmbuf_mtod(m, struct ether_hdr *);
*ip_hdr_pp = (struct ipv4_hdr *)(*eth_hdr_pp + 1);
}
}