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34 #include "gso_common.h"
35 #include "gso_tunnel_tcp4.h"
38 update_tunnel_ipv4_tcp_headers(struct rte_mbuf *pkt, uint8_t ipid_delta,
39 struct rte_mbuf **segs, uint16_t nb_segs)
41 struct ipv4_hdr *ipv4_hdr;
42 struct tcp_hdr *tcp_hdr;
44 uint16_t outer_id, inner_id, tail_idx, i;
45 uint16_t outer_ipv4_offset, inner_ipv4_offset, udp_offset, tcp_offset;
47 outer_ipv4_offset = pkt->outer_l2_len;
48 udp_offset = outer_ipv4_offset + pkt->outer_l3_len;
49 inner_ipv4_offset = udp_offset + pkt->l2_len;
50 tcp_offset = inner_ipv4_offset + pkt->l3_len;
52 /* Outer IPv4 header. */
53 ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
55 outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
57 /* Inner IPv4 header. */
58 ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
60 inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
62 tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
63 sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
64 tail_idx = nb_segs - 1;
66 for (i = 0; i < nb_segs; i++) {
67 update_ipv4_header(segs[i], outer_ipv4_offset, outer_id);
68 update_udp_header(segs[i], udp_offset);
69 update_ipv4_header(segs[i], inner_ipv4_offset, inner_id);
70 update_tcp_header(segs[i], tcp_offset, sent_seq, i < tail_idx);
72 inner_id += ipid_delta;
73 sent_seq += (segs[i]->pkt_len - segs[i]->data_len);
78 gso_tunnel_tcp4_segment(struct rte_mbuf *pkt,
81 struct rte_mempool *direct_pool,
82 struct rte_mempool *indirect_pool,
83 struct rte_mbuf **pkts_out,
86 struct ipv4_hdr *inner_ipv4_hdr;
87 uint16_t pyld_unit_size, hdr_offset, frag_off;
90 hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len;
91 inner_ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
94 * Don't process the packet whose MF bit or offset in the inner
95 * IPv4 header are non-zero.
97 frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset);
98 if (unlikely(IS_FRAGMENTED(frag_off))) {
103 hdr_offset += pkt->l3_len + pkt->l4_len;
104 /* Don't process the packet without data */
105 if (hdr_offset >= pkt->pkt_len) {
109 pyld_unit_size = gso_size - hdr_offset;
111 /* Segment the payload */
112 ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
113 indirect_pool, pkts_out, nb_pkts_out);
117 update_tunnel_ipv4_tcp_headers(pkt, ipid_delta, pkts_out, ret);