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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2016 Intel Corporation
*/
#ifndef __L3FWD_EM_H__
#define __L3FWD_EM_H__
static __rte_always_inline void
l3fwd_em_simple_forward(struct rte_mbuf *m, uint16_t portid,
struct lcore_conf *qconf)
{
struct ether_hdr *eth_hdr;
struct ipv4_hdr *ipv4_hdr;
uint16_t dst_port;
uint32_t tcp_or_udp;
uint32_t l3_ptypes;
eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
tcp_or_udp = m->packet_type & (RTE_PTYPE_L4_TCP | RTE_PTYPE_L4_UDP);
l3_ptypes = m->packet_type & RTE_PTYPE_L3_MASK;
if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV4)) {
/* Handle IPv4 headers.*/
ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
sizeof(struct ether_hdr));
#ifdef DO_RFC_1812_CHECKS
/* Check to make sure the packet is valid (RFC1812) */
if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
rte_pktmbuf_free(m);
return;
}
#endif
dst_port = em_get_ipv4_dst_port(ipv4_hdr, portid,
qconf->ipv4_lookup_struct);
if (dst_port >= RTE_MAX_ETHPORTS ||
(enabled_port_mask & 1 << dst_port) == 0)
dst_port = portid;
#ifdef DO_RFC_1812_CHECKS
/* Update time to live and header checksum */
--(ipv4_hdr->time_to_live);
++(ipv4_hdr->hdr_checksum);
#endif
/* dst addr */
*(uint64_t *)ð_hdr->d_addr = dest_eth_addr[dst_port];
/* src addr */
ether_addr_copy(&ports_eth_addr[dst_port], ð_hdr->s_addr);
send_single_packet(qconf, m, dst_port);
} else if (tcp_or_udp && (l3_ptypes == RTE_PTYPE_L3_IPV6)) {
/* Handle IPv6 headers.*/
struct ipv6_hdr *ipv6_hdr;
ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
sizeof(struct ether_hdr));
dst_port = em_get_ipv6_dst_port(ipv6_hdr, portid,
qconf->ipv6_lookup_struct);
if (dst_port >= RTE_MAX_ETHPORTS ||
(enabled_port_mask & 1 << dst_port) == 0)
dst_port = portid;
/* dst addr */
*(uint64_t *)ð_hdr->d_addr = dest_eth_addr[dst_port];
/* src addr */
ether_addr_copy(&ports_eth_addr[dst_port], ð_hdr->s_addr);
send_single_packet(qconf, m, dst_port);
} else {
/* Free the mbuf that contains non-IPV4/IPV6 packet */
rte_pktmbuf_free(m);
}
}
/*
* Buffer non-optimized handling of packets, invoked
* from main_loop.
*/
static inline void
l3fwd_em_no_opt_send_packets(int nb_rx, struct rte_mbuf **pkts_burst,
uint16_t portid, struct lcore_conf *qconf)
{
int32_t j;
/* Prefetch first packets */
for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
/*
* Prefetch and forward already prefetched
* packets.
*/
for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
j + PREFETCH_OFFSET], void *));
l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
}
/* Forward remaining prefetched packets */
for (; j < nb_rx; j++)
l3fwd_em_simple_forward(pkts_burst[j], portid, qconf);
}
#endif /* __L3FWD_EM_H__ */
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