aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/tunnel/tunnel_dp.h
blob: d6f07b5ec21467d2afa73c8d1d23bdb919675b82 (plain)
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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/*
 * tunnel_dp.h: data-plane functions tunnels.
 *
 * Copyright (c) 2019 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __TUNNEL_DP_H__
#define __TUNNEL_DP_H__

#include <vnet/tunnel/tunnel.h>

static_always_inline void
tunnel_encap_fixup_4o4 (tunnel_encap_decap_flags_t flags,
			const ip4_header_t * inner, ip4_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip4_header_set_dscp (outer, ip4_header_get_dscp (inner));
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
    ip4_header_set_ecn (outer, ip4_header_get_ecn (inner));
  if ((flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DF) &&
      ip4_header_get_df (inner))
    ip4_header_set_df (outer);
}

static_always_inline void
tunnel_encap_fixup_4o4_w_chksum (tunnel_encap_decap_flags_t flags,
				 const ip4_header_t * inner,
				 ip4_header_t * outer)
{
  if (flags & (TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP |
	       TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN))
    {
      ip_csum_t sum = outer->checksum;
      u8 tos = outer->tos;

      if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
	ip4_header_set_dscp (outer, ip4_header_get_dscp (inner));
      if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
	ip4_header_set_ecn (outer, ip4_header_get_ecn (inner));

      sum =
	ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, tos);
      outer->checksum = ip_csum_fold (sum);
    }
  if ((flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DF) &&
      ip4_header_get_df (inner))
    {
      ip_csum_t sum = outer->checksum;
      u16 tos = outer->flags_and_fragment_offset;

      ip4_header_set_df (outer);

      sum =
	ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t,
			flags_and_fragment_offset);
      outer->checksum = ip_csum_fold (sum);
    }
}

static_always_inline void
tunnel_encap_fixup_6o4 (tunnel_encap_decap_flags_t flags,
			const ip6_header_t * inner, ip4_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip4_header_set_dscp (outer, ip6_dscp_network_order (inner));
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
    ip4_header_set_ecn (outer, ip6_ecn_network_order ((inner)));
}

static_always_inline void
tunnel_encap_fixup_6o4_w_chksum (tunnel_encap_decap_flags_t flags,
				 const ip6_header_t * inner,
				 ip4_header_t * outer)
{
  if (flags & (TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP |
	       TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN))
    {
      ip_csum_t sum = outer->checksum;
      u8 tos = outer->tos;

      if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
	ip4_header_set_dscp (outer, ip6_dscp_network_order (inner));
      if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
	ip4_header_set_ecn (outer, ip6_ecn_network_order ((inner)));

      sum =
	ip_csum_update (outer->checksum, tos, outer->tos, ip4_header_t, tos);
      outer->checksum = ip_csum_fold (sum);
    }
}

static_always_inline void
tunnel_encap_fixup_6o6 (tunnel_encap_decap_flags_t flags,
			const ip6_header_t * inner, ip6_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip6_set_dscp_network_order (outer, ip6_dscp_network_order (inner));
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
    ip6_set_ecn_network_order (outer, ip6_ecn_network_order (inner));
}

static_always_inline void
tunnel_encap_fixup_4o6 (tunnel_encap_decap_flags_t flags,
			const ip4_header_t * inner, ip6_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip6_set_dscp_network_order (outer, ip4_header_get_dscp (inner));
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)
    ip6_set_ecn_network_order (outer, ip4_header_get_ecn (inner));
}

static_always_inline void
tunnel_encap_fixup_mplso6 (tunnel_encap_decap_flags_t flags,
			   const mpls_unicast_header_t *inner,
			   ip6_header_t *outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip6_set_dscp_network_order (outer,
				vnet_mpls_uc_get_exp (inner->label_exp_s_ttl));
}

static_always_inline void
tunnel_encap_fixup_mplso4 (tunnel_encap_decap_flags_t flags,
			   const mpls_unicast_header_t *inner,
			   ip4_header_t *outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)
    ip4_header_set_dscp (outer, vnet_mpls_uc_get_exp (inner->label_exp_s_ttl));
}

static_always_inline void
tunnel_decap_fixup_4o6 (tunnel_encap_decap_flags_t flags,
			ip4_header_t * inner, const ip6_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)
    ip4_header_set_ecn_w_chksum (inner, ip6_ecn_network_order (outer));
}

static_always_inline void
tunnel_decap_fixup_6o6 (tunnel_encap_decap_flags_t flags,
			ip6_header_t * inner, const ip6_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)
    ip6_set_ecn_network_order (inner, ip6_ecn_network_order (outer));
}

static_always_inline void
tunnel_decap_fixup_6o4 (tunnel_encap_decap_flags_t flags,
			ip6_header_t * inner, const ip4_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)
    ip6_set_ecn_network_order (inner, ip4_header_get_ecn (outer));
}

static_always_inline void
tunnel_decap_fixup_4o4 (tunnel_encap_decap_flags_t flags,
			ip4_header_t * inner, const ip4_header_t * outer)
{
  if (flags & TUNNEL_ENCAP_DECAP_FLAG_DECAP_COPY_ECN)
    ip4_header_set_ecn_w_chksum (inner, ip4_header_get_ecn (outer));
}

static_always_inline void
tunnel_decap_fixup_mplso6 (tunnel_encap_decap_flags_t flags,
			   mpls_unicast_header_t *inner,
			   const ip6_header_t *outer)
{
}

static_always_inline void
tunnel_decap_fixup_mplso4 (tunnel_encap_decap_flags_t flags,
			   mpls_unicast_header_t *inner,
			   const ip4_header_t *outer)
{
}

#endif

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */