609dd68ef1
Based on http://dpdk.org/ml/archives/dev/2015-January/011127.html Also adapt the csum forward engine code to the API. Signed-off-by: Olivier Matz <olivier.matz@6wind.com> Acked-by: Jijiang Liu <jijiang.liu@intel.com>
551 lines
17 KiB
C
551 lines
17 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* Copyright 2014 6WIND S.A.
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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 <stdarg.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <rte_common.h>
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#include <rte_byteorder.h>
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#include <rte_log.h>
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#include <rte_debug.h>
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#include <rte_cycles.h>
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#include <rte_memory.h>
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#include <rte_memcpy.h>
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#include <rte_memzone.h>
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#include <rte_launch.h>
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#include <rte_tailq.h>
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#include <rte_eal.h>
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#include <rte_per_lcore.h>
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#include <rte_lcore.h>
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#include <rte_atomic.h>
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#include <rte_branch_prediction.h>
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#include <rte_ring.h>
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#include <rte_memory.h>
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#include <rte_mempool.h>
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#include <rte_mbuf.h>
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#include <rte_memcpy.h>
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#include <rte_interrupts.h>
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#include <rte_pci.h>
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#include <rte_ether.h>
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#include <rte_ethdev.h>
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#include <rte_ip.h>
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#include <rte_tcp.h>
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#include <rte_udp.h>
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#include <rte_sctp.h>
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#include <rte_prefetch.h>
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#include <rte_string_fns.h>
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#include "testpmd.h"
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#define IP_DEFTTL 64 /* from RFC 1340. */
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#define IP_VERSION 0x40
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#define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
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#define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
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/* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */
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#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
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#define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
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#else
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#define _htons(x) (x)
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#endif
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static uint16_t
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get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
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{
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if (ethertype == _htons(ETHER_TYPE_IPv4))
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return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
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else /* assume ethertype == ETHER_TYPE_IPv6 */
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return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
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}
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static uint16_t
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get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
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{
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if (ethertype == _htons(ETHER_TYPE_IPv4))
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return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
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else /* assume ethertype == ETHER_TYPE_IPv6 */
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return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
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}
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/*
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* Parse an ethernet header to fill the ethertype, l2_len, l3_len and
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* ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
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* header. The l4_len argument is only set in case of TCP (useful for TSO).
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*/
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static void
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parse_ethernet(struct ether_hdr *eth_hdr, uint16_t *ethertype, uint16_t *l2_len,
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uint16_t *l3_len, uint8_t *l4_proto, uint16_t *l4_len)
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{
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struct ipv4_hdr *ipv4_hdr;
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struct ipv6_hdr *ipv6_hdr;
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struct tcp_hdr *tcp_hdr;
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*l2_len = sizeof(struct ether_hdr);
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*ethertype = eth_hdr->ether_type;
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if (*ethertype == _htons(ETHER_TYPE_VLAN)) {
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struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
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*l2_len += sizeof(struct vlan_hdr);
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*ethertype = vlan_hdr->eth_proto;
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}
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switch (*ethertype) {
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case _htons(ETHER_TYPE_IPv4):
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ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + *l2_len);
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*l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
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*l4_proto = ipv4_hdr->next_proto_id;
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break;
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case _htons(ETHER_TYPE_IPv6):
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ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + *l2_len);
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*l3_len = sizeof(struct ipv6_hdr);
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*l4_proto = ipv6_hdr->proto;
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break;
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default:
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*l3_len = 0;
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*l4_proto = 0;
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break;
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}
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if (*l4_proto == IPPROTO_TCP) {
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tcp_hdr = (struct tcp_hdr *)((char *)eth_hdr +
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*l2_len + *l3_len);
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*l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
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} else
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*l4_len = 0;
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}
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/* modify the IPv4 or IPv4 source address of a packet */
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static void
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change_ip_addresses(void *l3_hdr, uint16_t ethertype)
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{
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struct ipv4_hdr *ipv4_hdr = l3_hdr;
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struct ipv6_hdr *ipv6_hdr = l3_hdr;
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if (ethertype == _htons(ETHER_TYPE_IPv4)) {
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ipv4_hdr->src_addr =
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rte_cpu_to_be_32(rte_be_to_cpu_32(ipv4_hdr->src_addr) + 1);
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} else if (ethertype == _htons(ETHER_TYPE_IPv6)) {
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ipv6_hdr->src_addr[15] = ipv6_hdr->src_addr[15] + 1;
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}
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}
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/* if possible, calculate the checksum of a packet in hw or sw,
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* depending on the testpmd command line configuration */
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static uint64_t
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process_inner_cksums(void *l3_hdr, uint16_t ethertype, uint16_t l3_len,
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uint8_t l4_proto, uint16_t tso_segsz, uint16_t testpmd_ol_flags)
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{
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struct ipv4_hdr *ipv4_hdr = l3_hdr;
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struct udp_hdr *udp_hdr;
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struct tcp_hdr *tcp_hdr;
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struct sctp_hdr *sctp_hdr;
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uint64_t ol_flags = 0;
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if (ethertype == _htons(ETHER_TYPE_IPv4)) {
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ipv4_hdr = l3_hdr;
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ipv4_hdr->hdr_checksum = 0;
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ol_flags |= PKT_TX_IPV4;
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if (tso_segsz != 0 && l4_proto == IPPROTO_TCP) {
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ol_flags |= PKT_TX_IP_CKSUM;
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} else {
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if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
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ol_flags |= PKT_TX_IP_CKSUM;
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else
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ipv4_hdr->hdr_checksum =
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rte_ipv4_cksum(ipv4_hdr);
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}
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} else if (ethertype == _htons(ETHER_TYPE_IPv6))
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ol_flags |= PKT_TX_IPV6;
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else
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return 0; /* packet type not supported, nothing to do */
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if (l4_proto == IPPROTO_UDP) {
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udp_hdr = (struct udp_hdr *)((char *)l3_hdr + l3_len);
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/* do not recalculate udp cksum if it was 0 */
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if (udp_hdr->dgram_cksum != 0) {
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udp_hdr->dgram_cksum = 0;
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if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) {
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ol_flags |= PKT_TX_UDP_CKSUM;
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udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
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ethertype, ol_flags);
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} else {
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udp_hdr->dgram_cksum =
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get_udptcp_checksum(l3_hdr, udp_hdr,
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ethertype);
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}
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}
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} else if (l4_proto == IPPROTO_TCP) {
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tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + l3_len);
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tcp_hdr->cksum = 0;
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if (tso_segsz != 0) {
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ol_flags |= PKT_TX_TCP_SEG;
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tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype, ol_flags);
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} else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) {
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ol_flags |= PKT_TX_TCP_CKSUM;
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tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype, ol_flags);
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} else {
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tcp_hdr->cksum =
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get_udptcp_checksum(l3_hdr, tcp_hdr, ethertype);
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}
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} else if (l4_proto == IPPROTO_SCTP) {
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sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + l3_len);
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sctp_hdr->cksum = 0;
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/* sctp payload must be a multiple of 4 to be
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* offloaded */
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if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) &&
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((ipv4_hdr->total_length & 0x3) == 0)) {
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ol_flags |= PKT_TX_SCTP_CKSUM;
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} else {
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/* XXX implement CRC32c, example available in
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* RFC3309 */
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}
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}
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return ol_flags;
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}
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/* Calculate the checksum of outer header (only vxlan is supported,
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* meaning IP + UDP). The caller already checked that it's a vxlan
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* packet */
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static uint64_t
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process_outer_cksums(void *outer_l3_hdr, uint16_t outer_ethertype,
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uint16_t outer_l3_len, uint16_t testpmd_ol_flags)
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{
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struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
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struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
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struct udp_hdr *udp_hdr;
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uint64_t ol_flags = 0;
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if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
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ol_flags |= PKT_TX_UDP_TUNNEL_PKT;
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if (outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
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ipv4_hdr->hdr_checksum = 0;
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ol_flags |= PKT_TX_OUTER_IPV4;
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if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
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ol_flags |= PKT_TX_OUTER_IP_CKSUM;
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else
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ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
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} else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
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ol_flags |= PKT_TX_OUTER_IPV6;
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udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + outer_l3_len);
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/* do not recalculate udp cksum if it was 0 */
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if (udp_hdr->dgram_cksum != 0) {
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udp_hdr->dgram_cksum = 0;
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if (outer_ethertype == _htons(ETHER_TYPE_IPv4))
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udp_hdr->dgram_cksum =
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rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
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else
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udp_hdr->dgram_cksum =
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rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
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}
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return ol_flags;
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}
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/*
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* Receive a burst of packets, and for each packet:
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* - parse packet, and try to recognize a supported packet type (1)
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* - if it's not a supported packet type, don't touch the packet, else:
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* - modify the IPs in inner headers and in outer headers if any
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* - reprocess the checksum of all supported layers. This is done in SW
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* or HW, depending on testpmd command line configuration
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* - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
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* segmentation offload (this implies HW TCP checksum)
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* Then transmit packets on the output port.
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*
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* (1) Supported packets are:
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* Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
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* Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
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* UDP|TCP|SCTP
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*
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* The testpmd command line for this forward engine sets the flags
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* TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
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* wether a checksum must be calculated in software or in hardware. The
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* IP, UDP, TCP and SCTP flags always concern the inner layer. The
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* VxLAN flag concerns the outer IP (if packet is recognized as a vxlan packet).
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*/
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static void
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pkt_burst_checksum_forward(struct fwd_stream *fs)
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{
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struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
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struct rte_port *txp;
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struct rte_mbuf *m;
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struct ether_hdr *eth_hdr;
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void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
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struct udp_hdr *udp_hdr;
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uint16_t nb_rx;
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uint16_t nb_tx;
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uint16_t i;
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uint64_t ol_flags;
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uint16_t testpmd_ol_flags;
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uint8_t l4_proto, l4_tun_len = 0;
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uint16_t ethertype = 0, outer_ethertype = 0;
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uint16_t l2_len = 0, l3_len = 0, l4_len = 0;
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uint16_t outer_l2_len = 0, outer_l3_len = 0;
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uint16_t tso_segsz;
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int tunnel = 0;
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uint32_t rx_bad_ip_csum;
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uint32_t rx_bad_l4_csum;
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#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
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uint64_t start_tsc;
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uint64_t end_tsc;
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uint64_t core_cycles;
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#endif
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#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
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start_tsc = rte_rdtsc();
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#endif
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/* receive a burst of packet */
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nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
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nb_pkt_per_burst);
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if (unlikely(nb_rx == 0))
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return;
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#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
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fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
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#endif
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fs->rx_packets += nb_rx;
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rx_bad_ip_csum = 0;
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rx_bad_l4_csum = 0;
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txp = &ports[fs->tx_port];
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testpmd_ol_flags = txp->tx_ol_flags;
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tso_segsz = txp->tso_segsz;
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for (i = 0; i < nb_rx; i++) {
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ol_flags = 0;
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tunnel = 0;
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l4_tun_len = 0;
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m = pkts_burst[i];
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/* Update the L3/L4 checksum error packet statistics */
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rx_bad_ip_csum += ((m->ol_flags & PKT_RX_IP_CKSUM_BAD) != 0);
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rx_bad_l4_csum += ((m->ol_flags & PKT_RX_L4_CKSUM_BAD) != 0);
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/* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
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* and inner headers */
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eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
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parse_ethernet(eth_hdr, ðertype, &l2_len, &l3_len,
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&l4_proto, &l4_len);
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l3_hdr = (char *)eth_hdr + l2_len;
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/* check if it's a supported tunnel (only vxlan for now) */
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if (l4_proto == IPPROTO_UDP) {
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udp_hdr = (struct udp_hdr *)((char *)l3_hdr + l3_len);
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/* check udp destination port, 4789 is the default
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* vxlan port (rfc7348) */
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if (udp_hdr->dst_port == _htons(4789)) {
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l4_tun_len = ETHER_VXLAN_HLEN;
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tunnel = 1;
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/* currently, this flag is set by i40e only if the
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* packet is vxlan */
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} else if (m->ol_flags & (PKT_RX_TUNNEL_IPV4_HDR |
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PKT_RX_TUNNEL_IPV6_HDR))
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tunnel = 1;
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if (tunnel == 1) {
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outer_ethertype = ethertype;
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outer_l2_len = l2_len;
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outer_l3_len = l3_len;
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outer_l3_hdr = l3_hdr;
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eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
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sizeof(struct udp_hdr) +
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sizeof(struct vxlan_hdr));
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parse_ethernet(eth_hdr, ðertype, &l2_len,
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&l3_len, &l4_proto, &l4_len);
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l3_hdr = (char *)eth_hdr + l2_len;
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}
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}
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/* step 2: change all source IPs (v4 or v6) so we need
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* to recompute the chksums even if they were correct */
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change_ip_addresses(l3_hdr, ethertype);
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if (tunnel == 1)
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change_ip_addresses(outer_l3_hdr, outer_ethertype);
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/* step 3: depending on user command line configuration,
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* recompute checksum either in software or flag the
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* mbuf to offload the calculation to the NIC. If TSO
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* is configured, prepare the mbuf for TCP segmentation. */
|
|
|
|
/* process checksums of inner headers first */
|
|
ol_flags |= process_inner_cksums(l3_hdr, ethertype,
|
|
l3_len, l4_proto, tso_segsz, testpmd_ol_flags);
|
|
|
|
/* Then process outer headers if any. Note that the software
|
|
* checksum will be wrong if one of the inner checksums is
|
|
* processed in hardware. */
|
|
if (tunnel == 1) {
|
|
ol_flags |= process_outer_cksums(outer_l3_hdr,
|
|
outer_ethertype, outer_l3_len, testpmd_ol_flags);
|
|
}
|
|
|
|
/* step 4: fill the mbuf meta data (flags and header lengths) */
|
|
|
|
if (tunnel == 1) {
|
|
if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM) {
|
|
m->outer_l2_len = outer_l2_len;
|
|
m->outer_l3_len = outer_l3_len;
|
|
m->l2_len = l4_tun_len + l2_len;
|
|
m->l3_len = l3_len;
|
|
}
|
|
else {
|
|
/* if we don't do vxlan cksum in hw,
|
|
outer checksum will be wrong because
|
|
we changed the ip, but it shows that
|
|
we can process the inner header cksum
|
|
in the nic */
|
|
m->l2_len = outer_l2_len + outer_l3_len +
|
|
sizeof(struct udp_hdr) +
|
|
sizeof(struct vxlan_hdr) + l2_len;
|
|
m->l3_len = l3_len;
|
|
m->l4_len = l4_len;
|
|
}
|
|
} else {
|
|
/* this is only useful if an offload flag is
|
|
* set, but it does not hurt to fill it in any
|
|
* case */
|
|
m->l2_len = l2_len;
|
|
m->l3_len = l3_len;
|
|
m->l4_len = l4_len;
|
|
}
|
|
m->tso_segsz = tso_segsz;
|
|
m->ol_flags = ol_flags;
|
|
|
|
/* if verbose mode is enabled, dump debug info */
|
|
if (verbose_level > 0) {
|
|
struct {
|
|
uint64_t flag;
|
|
uint64_t mask;
|
|
} tx_flags[] = {
|
|
{ PKT_TX_IP_CKSUM, PKT_TX_IP_CKSUM },
|
|
{ PKT_TX_UDP_CKSUM, PKT_TX_L4_MASK },
|
|
{ PKT_TX_TCP_CKSUM, PKT_TX_L4_MASK },
|
|
{ PKT_TX_SCTP_CKSUM, PKT_TX_L4_MASK },
|
|
{ PKT_TX_UDP_TUNNEL_PKT, PKT_TX_UDP_TUNNEL_PKT },
|
|
{ PKT_TX_IPV4, PKT_TX_IPV4 },
|
|
{ PKT_TX_IPV6, PKT_TX_IPV6 },
|
|
{ PKT_TX_OUTER_IP_CKSUM, PKT_TX_OUTER_IP_CKSUM },
|
|
{ PKT_TX_OUTER_IPV4, PKT_TX_OUTER_IPV4 },
|
|
{ PKT_TX_OUTER_IPV6, PKT_TX_OUTER_IPV6 },
|
|
{ PKT_TX_TCP_SEG, PKT_TX_TCP_SEG },
|
|
};
|
|
unsigned j;
|
|
const char *name;
|
|
|
|
printf("-----------------\n");
|
|
/* dump rx parsed packet info */
|
|
printf("rx: l2_len=%d ethertype=%x l3_len=%d "
|
|
"l4_proto=%d l4_len=%d\n",
|
|
l2_len, rte_be_to_cpu_16(ethertype),
|
|
l3_len, l4_proto, l4_len);
|
|
if (tunnel == 1)
|
|
printf("rx: outer_l2_len=%d outer_ethertype=%x "
|
|
"outer_l3_len=%d\n", outer_l2_len,
|
|
rte_be_to_cpu_16(outer_ethertype),
|
|
outer_l3_len);
|
|
/* dump tx packet info */
|
|
if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM |
|
|
TESTPMD_TX_OFFLOAD_UDP_CKSUM |
|
|
TESTPMD_TX_OFFLOAD_TCP_CKSUM |
|
|
TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) ||
|
|
tso_segsz != 0)
|
|
printf("tx: m->l2_len=%d m->l3_len=%d "
|
|
"m->l4_len=%d\n",
|
|
m->l2_len, m->l3_len, m->l4_len);
|
|
if ((tunnel == 1) &&
|
|
(testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM))
|
|
printf("tx: m->outer_l2_len=%d m->outer_l3_len=%d\n",
|
|
m->outer_l2_len, m->outer_l3_len);
|
|
if (tso_segsz != 0)
|
|
printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
|
|
printf("tx: flags=");
|
|
for (j = 0; j < sizeof(tx_flags)/sizeof(*tx_flags); j++) {
|
|
name = rte_get_tx_ol_flag_name(tx_flags[j].flag);
|
|
if ((m->ol_flags & tx_flags[j].mask) ==
|
|
tx_flags[j].flag)
|
|
printf("%s ", name);
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
|
|
fs->tx_packets += nb_tx;
|
|
fs->rx_bad_ip_csum += rx_bad_ip_csum;
|
|
fs->rx_bad_l4_csum += rx_bad_l4_csum;
|
|
|
|
#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
|
|
fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
|
|
#endif
|
|
if (unlikely(nb_tx < nb_rx)) {
|
|
fs->fwd_dropped += (nb_rx - nb_tx);
|
|
do {
|
|
rte_pktmbuf_free(pkts_burst[nb_tx]);
|
|
} while (++nb_tx < nb_rx);
|
|
}
|
|
#ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
|
|
end_tsc = rte_rdtsc();
|
|
core_cycles = (end_tsc - start_tsc);
|
|
fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
|
|
#endif
|
|
}
|
|
|
|
struct fwd_engine csum_fwd_engine = {
|
|
.fwd_mode_name = "csum",
|
|
.port_fwd_begin = NULL,
|
|
.port_fwd_end = NULL,
|
|
.packet_fwd = pkt_burst_checksum_forward,
|
|
};
|
|
|