DPDK  20.08.0
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
9 extern "C" {
10 #endif
11 
12 #include <rte_ip.h>
13 #include <rte_udp.h>
14 #include <rte_tcp.h>
15 #include <rte_sctp.h>
16 
22  uint8_t l2_len;
23  uint8_t l3_len;
24  uint8_t l4_len;
25  uint8_t tunnel_len;
26  uint8_t inner_l2_len;
27  uint8_t inner_l3_len;
28  uint8_t inner_l4_len;
29 };
30 
54 __rte_experimental
55 int
56 rte_net_skip_ip6_ext(uint16_t proto, const struct rte_mbuf *m, uint32_t *off,
57  int *frag);
58 
90 uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
91  struct rte_net_hdr_lens *hdr_lens, uint32_t layers);
92 
113 static inline int
114 rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
115 {
116  /* Initialise ipv4_hdr to avoid false positive compiler warnings. */
117  struct rte_ipv4_hdr *ipv4_hdr = NULL;
118  struct rte_ipv6_hdr *ipv6_hdr;
119  struct rte_tcp_hdr *tcp_hdr;
120  struct rte_udp_hdr *udp_hdr;
121  uint64_t inner_l3_offset = m->l2_len;
122 
123  /*
124  * Does packet set any of available offloads?
125  * Mainly it is required to avoid fragmented headers check if
126  * no offloads are requested.
127  */
128  if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG)))
129  return 0;
130 
131  if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
132  inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
133 
134  /*
135  * Check if headers are fragmented.
136  * The check could be less strict depending on which offloads are
137  * requested and headers to be used, but let's keep it simple.
138  */
140  inner_l3_offset + m->l3_len + m->l4_len))
141  return -ENOTSUP;
142 
143  if (ol_flags & PKT_TX_IPV4) {
144  ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
145  inner_l3_offset);
146 
147  if (ol_flags & PKT_TX_IP_CKSUM)
148  ipv4_hdr->hdr_checksum = 0;
149  }
150 
151  if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM) {
152  if (ol_flags & PKT_TX_IPV4) {
153  udp_hdr = (struct rte_udp_hdr *)((char *)ipv4_hdr +
154  m->l3_len);
155  udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
156  ol_flags);
157  } else {
158  ipv6_hdr = rte_pktmbuf_mtod_offset(m,
159  struct rte_ipv6_hdr *, inner_l3_offset);
160  /* non-TSO udp */
161  udp_hdr = rte_pktmbuf_mtod_offset(m,
162  struct rte_udp_hdr *,
163  inner_l3_offset + m->l3_len);
164  udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
165  ol_flags);
166  }
167  } else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM ||
168  (ol_flags & PKT_TX_TCP_SEG)) {
169  if (ol_flags & PKT_TX_IPV4) {
170  /* non-TSO tcp or TSO */
171  tcp_hdr = (struct rte_tcp_hdr *)((char *)ipv4_hdr +
172  m->l3_len);
173  tcp_hdr->cksum = rte_ipv4_phdr_cksum(ipv4_hdr,
174  ol_flags);
175  } else {
176  ipv6_hdr = rte_pktmbuf_mtod_offset(m,
177  struct rte_ipv6_hdr *, inner_l3_offset);
178  /* non-TSO tcp or TSO */
179  tcp_hdr = rte_pktmbuf_mtod_offset(m,
180  struct rte_tcp_hdr *,
181  inner_l3_offset + m->l3_len);
182  tcp_hdr->cksum = rte_ipv6_phdr_cksum(ipv6_hdr,
183  ol_flags);
184  }
185  }
186 
187  return 0;
188 }
189 
208 static inline int
209 rte_net_intel_cksum_prepare(struct rte_mbuf *m)
210 {
211  return rte_net_intel_cksum_flags_prepare(m, m->ol_flags);
212 }
213 
214 #ifdef __cplusplus
215 }
216 #endif
217 
218 
219 #endif /* _RTE_NET_PTYPE_H_ */
uint64_t l2_len
#define PKT_TX_TCP_CKSUM
#define PKT_TX_IPV4
uint64_t l4_len
#define PKT_TX_UDP_CKSUM
#define PKT_TX_OUTER_IPV4
rte_be16_t cksum
Definition: rte_tcp.h:36
uint64_t outer_l3_len
#define rte_pktmbuf_mtod_offset(m, t, o)
uint64_t l3_len
#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:297
static uint16_t rte_ipv6_phdr_cksum(const struct rte_ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
Definition: rte_ip.h:402
#define PKT_TX_TCP_SEG
uint64_t outer_l2_len
#define PKT_TX_IP_CKSUM
uint64_t ol_flags
rte_be16_t dgram_cksum
Definition: rte_udp.h:32
#define rte_pktmbuf_data_len(m)
Definition: rte_mbuf.h:1565
#define PKT_TX_L4_MASK
#define PKT_TX_OUTER_IPV6
rte_be16_t hdr_checksum
Definition: rte_ip.h:41