99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#include "gso_common.h"
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#include "gso_tunnel_tcp4.h"
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static void
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update_tunnel_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 rte_ipv4_hdr *ipv4_hdr;
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struct rte_tcp_hdr *tcp_hdr;
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uint32_t sent_seq;
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uint16_t outer_id, inner_id, tail_idx, i;
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uint16_t outer_ipv4_offset, inner_ipv4_offset;
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uint16_t udp_gre_offset, tcp_offset;
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uint8_t update_udp_hdr;
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outer_ipv4_offset = pkt->outer_l2_len;
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udp_gre_offset = outer_ipv4_offset + pkt->outer_l3_len;
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inner_ipv4_offset = udp_gre_offset + pkt->l2_len;
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tcp_offset = inner_ipv4_offset + pkt->l3_len;
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/* Outer IPv4 header. */
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ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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outer_ipv4_offset);
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outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
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/* Inner IPv4 header. */
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ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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inner_ipv4_offset);
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inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
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tcp_hdr = (struct rte_tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
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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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/* Only update UDP header for VxLAN packets. */
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update_udp_hdr = (pkt->ol_flags & PKT_TX_TUNNEL_VXLAN) ? 1 : 0;
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for (i = 0; i < nb_segs; i++) {
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update_ipv4_header(segs[i], outer_ipv4_offset, outer_id);
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if (update_udp_hdr)
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update_udp_header(segs[i], udp_gre_offset);
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update_ipv4_header(segs[i], inner_ipv4_offset, inner_id);
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update_tcp_header(segs[i], tcp_offset, sent_seq, i < tail_idx);
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outer_id++;
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inner_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_tunnel_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 rte_ipv4_hdr *inner_ipv4_hdr;
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uint16_t pyld_unit_size, hdr_offset, frag_off;
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int ret;
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hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len;
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inner_ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
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hdr_offset);
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/*
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* Don't process the packet whose MF bit or offset in the inner
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* IPv4 header are non-zero.
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*/
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frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset);
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if (unlikely(IS_FRAGMENTED(frag_off))) {
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return 0;
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}
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hdr_offset += pkt->l3_len + pkt->l4_len;
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/* Don't process the packet without data */
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if (hdr_offset >= pkt->pkt_len) {
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return 0;
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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_tunnel_ipv4_tcp_headers(pkt, ipid_delta, pkts_out, ret);
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return ret;
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}
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