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34 #ifndef __L3FWD_EM_H__
35 #define __L3FWD_EM_H__
37 static inline __attribute__((always_inline)) void
38 l3fwd_em_simple_forward(struct rte_mbuf *m, uint8_t portid,
39 struct lcore_conf *qconf)
41 struct ether_hdr *eth_hdr;
42 struct ipv4_hdr *ipv4_hdr;
47 eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
48 tcp_or_udp = m->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
49 l3_ptypes = m->packet_type & RTE_PTYPE_L3_MASK;
51 if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) {
52 /* Handle IPv4 headers.*/
53 ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
54 sizeof(struct ether_hdr));
56 #ifdef DO_RFC_1812_CHECKS
57 /* Check to make sure the packet is valid (RFC1812) */
58 if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
63 dst_port = em_get_ipv4_dst_port(ipv4_hdr, portid,
64 qconf->ipv4_lookup_struct);
66 if (dst_port >= RTE_MAX_ETHPORTS ||
67 (enabled_port_mask & 1 << dst_port) == 0)
70 #ifdef DO_RFC_1812_CHECKS
71 /* Update time to live and header checksum */
72 --(ipv4_hdr->time_to_live);
73 ++(ipv4_hdr->hdr_checksum);
76 *(uint64_t *)ð_hdr->d_addr = dest_eth_addr[dst_port];
79 ether_addr_copy(&ports_eth_addr[dst_port], ð_hdr->s_addr);
81 send_single_packet(qconf, m, dst_port);
82 } else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
83 /* Handle IPv6 headers.*/
84 struct ipv6_hdr *ipv6_hdr;
86 ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
87 sizeof(struct ether_hdr));
89 dst_port = em_get_ipv6_dst_port(ipv6_hdr, portid,
90 qconf->ipv6_lookup_struct);
92 if (dst_port >= RTE_MAX_ETHPORTS ||
93 (enabled_port_mask & 1 << dst_port) == 0)
97 *(uint64_t *)ð_hdr->d_addr = dest_eth_addr[dst_port];
100 ether_addr_copy(&ports_eth_addr[dst_port], ð_hdr->s_addr);
102 send_single_packet(qconf, m, dst_port);
104 /* Free the mbuf that contains non-IPV4/IPV6 packet */
110 * Buffer non-optimized handling of packets, invoked
114 l3fwd_em_no_opt_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
115 uint8_t portid, struct lcore_conf *qconf)
119 /* Prefetch first packets */
120 for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
121 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
124 * Prefetch and forward already prefetched
127 for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
128 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
129 j + PREFETCH_OFFSET], void *));
130 l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
133 /* Forward remaining prefetched packets */
134 for (; j < nb_rx; j++)
135 l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
138 #endif /* __L3FWD_EM_H__ */