LXR dpdk/examples/l3fwd/l3fwd

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright(c) 2010-2016 Intel Corporation
   3 */
   4
   5#ifndef __L3FWD_LPM_H__
   6#define __L3FWD_LPM_H__
   7
   8static __rte_always_inline void
   9l3fwd_lpm_simple_forward(struct rte_mbuf *m, uint16_t portid,
  10                struct lcore_conf *qconf)
  11{
  12        struct rte_ether_hdr *eth_hdr;
  13        struct rte_ipv4_hdr *ipv4_hdr;
  14        uint16_t dst_port;
  15
  16        eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
  17
  18        if (RTE_ETH_IS_IPV4_HDR(m->packet_type)) {
  19                /* Handle IPv4 headers.*/
  20                ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
  21                                                sizeof(struct rte_ether_hdr));
  22
  23#ifdef DO_RFC_1812_CHECKS
  24                /* Check to make sure the packet is valid (RFC1812) */
  25                if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
  26                        rte_pktmbuf_free(m);
  27                        return;
  28                }
  29#endif
  30                 dst_port = lpm_get_ipv4_dst_port(ipv4_hdr, portid,
  31                                                qconf->ipv4_lookup_struct);
  32
  33                if (dst_port >= RTE_MAX_ETHPORTS ||
  34                        (enabled_port_mask & 1 << dst_port) == 0)
  35                        dst_port = portid;
  36
  37#ifdef DO_RFC_1812_CHECKS
  38                /* Update time to live and header checksum */
  39                --(ipv4_hdr->time_to_live);
  40                ++(ipv4_hdr->hdr_checksum);
  41#endif
  42                /* dst addr */
  43                *(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
  44
  45                /* src addr */
  46                rte_ether_addr_copy(&ports_eth_addr[dst_port],
  47                                &eth_hdr->s_addr);
  48
  49                send_single_packet(qconf, m, dst_port);
  50        } else if (RTE_ETH_IS_IPV6_HDR(m->packet_type)) {
  51                /* Handle IPv6 headers.*/
  52                struct rte_ipv6_hdr *ipv6_hdr;
  53
  54                ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv6_hdr *,
  55                                                sizeof(struct rte_ether_hdr));
  56
  57                dst_port = lpm_get_ipv6_dst_port(ipv6_hdr, portid,
  58                                        qconf->ipv6_lookup_struct);
  59
  60                if (dst_port >= RTE_MAX_ETHPORTS ||
  61                        (enabled_port_mask & 1 << dst_port) == 0)
  62                        dst_port = portid;
  63
  64                /* dst addr */
  65                *(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
  66
  67                /* src addr */
  68                rte_ether_addr_copy(&ports_eth_addr[dst_port],
  69                                &eth_hdr->s_addr);
  70
  71                send_single_packet(qconf, m, dst_port);
  72        } else {
  73                /* Free the mbuf that contains non-IPV4/IPV6 packet */
  74                rte_pktmbuf_free(m);
  75        }
  76}
  77
  78static inline void
  79l3fwd_lpm_no_opt_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
  80                                uint16_t portid, struct lcore_conf *qconf)
  81{
  82        int32_t j;
  83
  84        /* Prefetch first packets */
  85        for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
  86                rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
  87
  88        /* Prefetch and forward already prefetched packets. */
  89        for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
  90                rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
  91                                j + PREFETCH_OFFSET], void *));
  92                l3fwd_lpm_simple_forward(pkts_burst[j], portid, qconf);
  93        }
  94
  95        /* Forward remaining prefetched packets */
  96        for (; j < nb_rx; j++)
  97                l3fwd_lpm_simple_forward(pkts_burst[j], portid, qconf);
  98}
  99
 100#endif /* __L3FWD_LPM_H__ */
 101