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/*-
* BSD LICENSE
*
* Copyright(c) 2017 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gso_common.h"
#include "gso_tunnel_tcp4.h"
static void
update_tunnel_ipv4_tcp_headers(struct rte_mbuf *pkt, uint8_t ipid_delta,
struct rte_mbuf **segs, uint16_t nb_segs)
{
struct ipv4_hdr *ipv4_hdr;
struct tcp_hdr *tcp_hdr;
uint32_t sent_seq;
uint16_t outer_id, inner_id, tail_idx, i;
uint16_t outer_ipv4_offset, inner_ipv4_offset;
uint16_t udp_gre_offset, tcp_offset;
uint8_t update_udp_hdr;
outer_ipv4_offset = pkt->outer_l2_len;
udp_gre_offset = outer_ipv4_offset + pkt->outer_l3_len;
inner_ipv4_offset = udp_gre_offset + pkt->l2_len;
tcp_offset = inner_ipv4_offset + pkt->l3_len;
/* Outer IPv4 header. */
ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
outer_ipv4_offset);
outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
/* Inner IPv4 header. */
ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
inner_ipv4_offset);
inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
tail_idx = nb_segs - 1;
/* Only update UDP header for VxLAN packets. */
update_udp_hdr = (pkt->ol_flags & PKT_TX_TUNNEL_VXLAN) ? 1 : 0;
for (i = 0; i < nb_segs; i++) {
update_ipv4_header(segs[i], outer_ipv4_offset, outer_id);
if (update_udp_hdr)
update_udp_header(segs[i], udp_gre_offset);
update_ipv4_header(segs[i], inner_ipv4_offset, inner_id);
update_tcp_header(segs[i], tcp_offset, sent_seq, i < tail_idx);
outer_id++;
inner_id += ipid_delta;
sent_seq += (segs[i]->pkt_len - segs[i]->data_len);
}
}
int
gso_tunnel_tcp4_segment(struct rte_mbuf *pkt,
uint16_t gso_size,
uint8_t ipid_delta,
struct rte_mempool *direct_pool,
struct rte_mempool *indirect_pool,
struct rte_mbuf **pkts_out,
uint16_t nb_pkts_out)
{
struct ipv4_hdr *inner_ipv4_hdr;
uint16_t pyld_unit_size, hdr_offset, frag_off;
int ret = 1;
hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len;
inner_ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
hdr_offset);
/*
* Don't process the packet whose MF bit or offset in the inner
* IPv4 header are non-zero.
*/
frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset);
if (unlikely(IS_FRAGMENTED(frag_off))) {
pkts_out[0] = pkt;
return 1;
}
hdr_offset += pkt->l3_len + pkt->l4_len;
/* Don't process the packet without data */
if (hdr_offset >= pkt->pkt_len) {
pkts_out[0] = pkt;
return 1;
}
pyld_unit_size = gso_size - hdr_offset;
/* Segment the payload */
ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
indirect_pool, pkts_out, nb_pkts_out);
if (ret <= 1)
return ret;
update_tunnel_ipv4_tcp_headers(pkt, ipid_delta, pkts_out, ret);
return ret;
}
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