1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __L3FWD_EM_H__
#define __L3FWD_EM_H__
static __rte_always_inline void
l3fwd_em_simple_forward(struct rte_mbuf *m, uint8_t portid,
struct lcore_conf *qconf)
{
struct ether_hdr *eth_hdr;
struct ipv4_hdr *ipv4_hdr;
uint8_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,
uint8_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__ */
|
