DPDK 23.11.2
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rte_net.h
1/* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2016 6WIND S.A.
3 */
4
5#ifndef _RTE_NET_PTYPE_H_
6#define _RTE_NET_PTYPE_H_
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
12#include <rte_ip.h>
13#include <rte_udp.h>
14#include <rte_tcp.h>
15
21 uint8_t l2_len;
22 uint8_t inner_l2_len;
23 uint16_t l3_len;
24 uint16_t inner_l3_len;
25 uint16_t tunnel_len;
26 uint8_t l4_len;
27 uint8_t inner_l4_len;
28};
29
50int
51rte_net_skip_ip6_ext(uint16_t proto, const struct rte_mbuf *m, uint32_t *off,
52 int *frag);
53
85uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
86 struct rte_net_hdr_lens *hdr_lens, uint32_t layers);
87
108static inline int
109rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
110{
111 /* Initialise ipv4_hdr to avoid false positive compiler warnings. */
112 struct rte_ipv4_hdr *ipv4_hdr = NULL;
113 struct rte_ipv6_hdr *ipv6_hdr;
114 struct rte_tcp_hdr *tcp_hdr;
115 struct rte_udp_hdr *udp_hdr;
116 uint64_t inner_l3_offset = m->l2_len;
117
118 /*
119 * Does packet set any of available offloads?
120 * Mainly it is required to avoid fragmented headers check if
121 * no offloads are requested.
122 */
126 return 0;
127
129 inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
130 /*
131 * prepare outer IPv4 header checksum by setting it to 0,
132 * in order to be computed by hardware NICs.
133 */
134 if (ol_flags & RTE_MBUF_F_TX_OUTER_IP_CKSUM) {
135 ipv4_hdr = rte_pktmbuf_mtod_offset(m,
136 struct rte_ipv4_hdr *, m->outer_l2_len);
137 ipv4_hdr->hdr_checksum = 0;
138 }
139 if (ol_flags & RTE_MBUF_F_TX_OUTER_UDP_CKSUM) {
140 if (ol_flags & RTE_MBUF_F_TX_OUTER_IPV4) {
141 ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
142 m->outer_l2_len);
143 udp_hdr = (struct rte_udp_hdr *)((char *)ipv4_hdr +
144 m->outer_l3_len);
145 udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr, m->ol_flags);
146 } else {
147 ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv6_hdr *,
148 m->outer_l2_len);
149 udp_hdr = rte_pktmbuf_mtod_offset(m, struct rte_udp_hdr *,
150 m->outer_l2_len + m->outer_l3_len);
151 udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr, m->ol_flags);
152 }
153 }
154 }
155
156 /*
157 * Check if headers are fragmented.
158 * The check could be less strict depending on which offloads are
159 * requested and headers to be used, but let's keep it simple.
160 */
162 inner_l3_offset + m->l3_len + m->l4_len))
163 return -ENOTSUP;
164
165 if (ol_flags & RTE_MBUF_F_TX_IPV4) {
166 ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
167 inner_l3_offset);
168
169 if (ol_flags & RTE_MBUF_F_TX_IP_CKSUM)
170 ipv4_hdr->hdr_checksum = 0;
171 }
172
174 (ol_flags & RTE_MBUF_F_TX_UDP_SEG)) {
175 if (ol_flags & RTE_MBUF_F_TX_IPV4) {
176 udp_hdr = (struct rte_udp_hdr *)((char *)ipv4_hdr +
177 m->l3_len);
178 udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
179 ol_flags);
180 } else {
181 ipv6_hdr = rte_pktmbuf_mtod_offset(m,
182 struct rte_ipv6_hdr *, inner_l3_offset);
183 /* non-TSO udp */
184 udp_hdr = rte_pktmbuf_mtod_offset(m,
185 struct rte_udp_hdr *,
186 inner_l3_offset + m->l3_len);
187 udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
188 ol_flags);
189 }
190 } else if ((ol_flags & RTE_MBUF_F_TX_L4_MASK) == RTE_MBUF_F_TX_TCP_CKSUM ||
191 (ol_flags & RTE_MBUF_F_TX_TCP_SEG)) {
192 if (ol_flags & RTE_MBUF_F_TX_IPV4) {
193 /* non-TSO tcp or TSO */
194 tcp_hdr = (struct rte_tcp_hdr *)((char *)ipv4_hdr +
195 m->l3_len);
196 tcp_hdr->cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
197 ol_flags);
198 } else {
199 ipv6_hdr = rte_pktmbuf_mtod_offset(m,
200 struct rte_ipv6_hdr *, inner_l3_offset);
201 /* non-TSO tcp or TSO */
202 tcp_hdr = rte_pktmbuf_mtod_offset(m,
203 struct rte_tcp_hdr *,
204 inner_l3_offset + m->l3_len);
205 tcp_hdr->cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
206 ol_flags);
207 }
208 }
209
210 return 0;
211}
212
231static inline int
232rte_net_intel_cksum_prepare(struct rte_mbuf *m)
233{
234 return rte_net_intel_cksum_flags_prepare(m, m->ol_flags);
235}
236
237#ifdef __cplusplus
238}
239#endif
240
241
242#endif /* _RTE_NET_PTYPE_H_ */
#define unlikely(x)
static uint16_t rte_ipv4_phdr_cksum(const struct rte_ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
Definition rte_ip.h:331
static uint16_t rte_ipv6_phdr_cksum(const struct rte_ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
Definition rte_ip.h:586
#define rte_pktmbuf_data_len(m)
Definition rte_mbuf.h:1568
#define RTE_MBUF_F_TX_OUTER_UDP_CKSUM
#define RTE_MBUF_F_TX_OUTER_IP_CKSUM
#define RTE_MBUF_F_TX_UDP_SEG
#define RTE_MBUF_F_TX_IP_CKSUM
#define RTE_MBUF_F_TX_OUTER_IPV6
#define RTE_MBUF_F_TX_TCP_SEG
#define RTE_MBUF_F_TX_L4_MASK
#define RTE_MBUF_F_TX_OUTER_IPV4
#define RTE_MBUF_F_TX_TCP_CKSUM
#define RTE_MBUF_F_TX_IPV4
#define rte_pktmbuf_mtod_offset(m, t, o)
#define RTE_MBUF_F_TX_UDP_CKSUM
rte_be16_t hdr_checksum
Definition rte_ip.h:61
uint64_t ol_flags
uint64_t l4_len
uint64_t l3_len
uint64_t l2_len
uint64_t outer_l3_len
uint64_t outer_l2_len
rte_be16_t cksum
Definition rte_tcp.h:36
rte_be16_t dgram_cksum
Definition rte_udp.h:32