103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "gso_common.h"
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#include "gso_tcp4.h"
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static void
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update_ipv4_tcp_headers(struct rte_mbuf *pkt, uint8_t ipid_delta,
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struct rte_mbuf **segs, uint16_t nb_segs)
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{
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struct ipv4_hdr *ipv4_hdr;
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struct tcp_hdr *tcp_hdr;
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uint32_t sent_seq;
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uint16_t id, tail_idx, i;
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uint16_t l3_offset = pkt->l2_len;
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uint16_t l4_offset = l3_offset + pkt->l3_len;
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ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char*) +
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l3_offset);
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tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
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id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
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sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
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tail_idx = nb_segs - 1;
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for (i = 0; i < nb_segs; i++) {
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update_ipv4_header(segs[i], l3_offset, id);
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update_tcp_header(segs[i], l4_offset, sent_seq, i < tail_idx);
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id += ipid_delta;
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sent_seq += (segs[i]->pkt_len - segs[i]->data_len);
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}
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}
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int
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gso_tcp4_segment(struct rte_mbuf *pkt,
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uint16_t gso_size,
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uint8_t ipid_delta,
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struct rte_mempool *direct_pool,
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struct rte_mempool *indirect_pool,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out)
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{
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struct ipv4_hdr *ipv4_hdr;
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uint16_t pyld_unit_size, hdr_offset;
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uint16_t frag_off;
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int ret;
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/* Don't process the fragmented packet */
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ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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pkt->l2_len);
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frag_off = rte_be_to_cpu_16(ipv4_hdr->fragment_offset);
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if (unlikely(IS_FRAGMENTED(frag_off))) {
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pkts_out[0] = pkt;
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return 1;
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}
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/* Don't process the packet without data */
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hdr_offset = pkt->l2_len + pkt->l3_len + pkt->l4_len;
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if (unlikely(hdr_offset >= pkt->pkt_len)) {
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pkts_out[0] = pkt;
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return 1;
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}
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pyld_unit_size = gso_size - hdr_offset;
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/* Segment the payload */
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ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
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indirect_pool, pkts_out, nb_pkts_out);
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if (ret > 1)
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update_ipv4_tcp_headers(pkt, ipid_delta, pkts_out, ret);
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return ret;
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}
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