1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _IF_TUNNEL_H_
3#define _IF_TUNNEL_H_
4
5#include <linux/types.h>
6#include <linux/if.h>
7#include <linux/ip.h>
8#include <linux/in6.h>
9#include <asm/byteorder.h>
10
11
12#define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0)
13#define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
14#define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2)
15#define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3)
16#define SIOCGETPRL (SIOCDEVPRIVATE + 4)
17#define SIOCADDPRL (SIOCDEVPRIVATE + 5)
18#define SIOCDELPRL (SIOCDEVPRIVATE + 6)
19#define SIOCCHGPRL (SIOCDEVPRIVATE + 7)
20#define SIOCGET6RD (SIOCDEVPRIVATE + 8)
21#define SIOCADD6RD (SIOCDEVPRIVATE + 9)
22#define SIOCDEL6RD (SIOCDEVPRIVATE + 10)
23#define SIOCCHG6RD (SIOCDEVPRIVATE + 11)
24
25#define GRE_CSUM __cpu_to_be16(0x8000)
26#define GRE_ROUTING __cpu_to_be16(0x4000)
27#define GRE_KEY __cpu_to_be16(0x2000)
28#define GRE_SEQ __cpu_to_be16(0x1000)
29#define GRE_STRICT __cpu_to_be16(0x0800)
30#define GRE_REC __cpu_to_be16(0x0700)
31#define GRE_ACK __cpu_to_be16(0x0080)
32#define GRE_FLAGS __cpu_to_be16(0x0078)
33#define GRE_VERSION __cpu_to_be16(0x0007)
34
35#define GRE_IS_CSUM(f) ((f) & GRE_CSUM)
36#define GRE_IS_ROUTING(f) ((f) & GRE_ROUTING)
37#define GRE_IS_KEY(f) ((f) & GRE_KEY)
38#define GRE_IS_SEQ(f) ((f) & GRE_SEQ)
39#define GRE_IS_STRICT(f) ((f) & GRE_STRICT)
40#define GRE_IS_REC(f) ((f) & GRE_REC)
41#define GRE_IS_ACK(f) ((f) & GRE_ACK)
42
43#define GRE_VERSION_0 __cpu_to_be16(0x0000)
44#define GRE_VERSION_1 __cpu_to_be16(0x0001)
45#define GRE_PROTO_PPP __cpu_to_be16(0x880b)
46#define GRE_PPTP_KEY_MASK __cpu_to_be32(0xffff)
47
48struct ip_tunnel_parm {
49 char name[IFNAMSIZ];
50 int link;
51 __be16 i_flags;
52 __be16 o_flags;
53 __be32 i_key;
54 __be32 o_key;
55 struct iphdr iph;
56};
57
58enum {
59 IFLA_IPTUN_UNSPEC,
60 IFLA_IPTUN_LINK,
61 IFLA_IPTUN_LOCAL,
62 IFLA_IPTUN_REMOTE,
63 IFLA_IPTUN_TTL,
64 IFLA_IPTUN_TOS,
65 IFLA_IPTUN_ENCAP_LIMIT,
66 IFLA_IPTUN_FLOWINFO,
67 IFLA_IPTUN_FLAGS,
68 IFLA_IPTUN_PROTO,
69 IFLA_IPTUN_PMTUDISC,
70 IFLA_IPTUN_6RD_PREFIX,
71 IFLA_IPTUN_6RD_RELAY_PREFIX,
72 IFLA_IPTUN_6RD_PREFIXLEN,
73 IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
74 IFLA_IPTUN_ENCAP_TYPE,
75 IFLA_IPTUN_ENCAP_FLAGS,
76 IFLA_IPTUN_ENCAP_SPORT,
77 IFLA_IPTUN_ENCAP_DPORT,
78 IFLA_IPTUN_COLLECT_METADATA,
79 IFLA_IPTUN_FWMARK,
80 __IFLA_IPTUN_MAX,
81};
82#define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
83
84enum tunnel_encap_types {
85 TUNNEL_ENCAP_NONE,
86 TUNNEL_ENCAP_FOU,
87 TUNNEL_ENCAP_GUE,
88 TUNNEL_ENCAP_MPLS,
89};
90
91#define TUNNEL_ENCAP_FLAG_CSUM (1<<0)
92#define TUNNEL_ENCAP_FLAG_CSUM6 (1<<1)
93#define TUNNEL_ENCAP_FLAG_REMCSUM (1<<2)
94
95/* SIT-mode i_flags */
96#define SIT_ISATAP 0x0001
97
98struct ip_tunnel_prl {
99 __be32 addr;
100 __u16 flags;
101 __u16 __reserved;
102 __u32 datalen;
103 __u32 __reserved2;
104 /* data follows */
105};
106
107/* PRL flags */
108#define PRL_DEFAULT 0x0001
109
110struct ip_tunnel_6rd {
111 struct in6_addr prefix;
112 __be32 relay_prefix;
113 __u16 prefixlen;
114 __u16 relay_prefixlen;
115};
116
117enum {
118 IFLA_GRE_UNSPEC,
119 IFLA_GRE_LINK,
120 IFLA_GRE_IFLAGS,
121 IFLA_GRE_OFLAGS,
122 IFLA_GRE_IKEY,
123 IFLA_GRE_OKEY,
124 IFLA_GRE_LOCAL,
125 IFLA_GRE_REMOTE,
126 IFLA_GRE_TTL,
127 IFLA_GRE_TOS,
128 IFLA_GRE_PMTUDISC,
129 IFLA_GRE_ENCAP_LIMIT,
130 IFLA_GRE_FLOWINFO,
131 IFLA_GRE_FLAGS,
132 IFLA_GRE_ENCAP_TYPE,
133 IFLA_GRE_ENCAP_FLAGS,
134 IFLA_GRE_ENCAP_SPORT,
135 IFLA_GRE_ENCAP_DPORT,
136 IFLA_GRE_COLLECT_METADATA,
137 IFLA_GRE_IGNORE_DF,
138 IFLA_GRE_FWMARK,
139 IFLA_GRE_ERSPAN_INDEX,
140 IFLA_GRE_ERSPAN_VER,
141 IFLA_GRE_ERSPAN_DIR,
142 IFLA_GRE_ERSPAN_HWID,
143 __IFLA_GRE_MAX,
144};
145
146#define IFLA_GRE_MAX (__IFLA_GRE_MAX - 1)
147
148/* VTI-mode i_flags */
149#define VTI_ISVTI ((__be16)0x0001)
150
151enum {
152 IFLA_VTI_UNSPEC,
153 IFLA_VTI_LINK,
154 IFLA_VTI_IKEY,
155 IFLA_VTI_OKEY,
156 IFLA_VTI_LOCAL,
157 IFLA_VTI_REMOTE,
158 IFLA_VTI_FWMARK,
159 __IFLA_VTI_MAX,
160};
161
162#define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
163
164/* Historically, tunnel flags have been defined as __be16 and now there are
165 * no free bits left. It is strongly advised to switch the already existing
166 * userspace code to the new *_BIT definitions from down below, as __be16
167 * can't be simply cast to a wider type on LE systems. All new flags and
168 * code must use *_BIT only.
169 */
170
171#define TUNNEL_CSUM __cpu_to_be16(0x01)
172#define TUNNEL_ROUTING __cpu_to_be16(0x02)
173#define TUNNEL_KEY __cpu_to_be16(0x04)
174#define TUNNEL_SEQ __cpu_to_be16(0x08)
175#define TUNNEL_STRICT __cpu_to_be16(0x10)
176#define TUNNEL_REC __cpu_to_be16(0x20)
177#define TUNNEL_VERSION __cpu_to_be16(0x40)
178#define TUNNEL_NO_KEY __cpu_to_be16(0x80)
179#define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100)
180#define TUNNEL_OAM __cpu_to_be16(0x0200)
181#define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400)
182#define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800)
183#define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000)
184#define TUNNEL_NOCACHE __cpu_to_be16(0x2000)
185#define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000)
186#define TUNNEL_GTP_OPT __cpu_to_be16(0x8000)
187
188#define TUNNEL_OPTIONS_PRESENT \
189 (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT | \
190 TUNNEL_GTP_OPT)
191
192enum {
193 IP_TUNNEL_CSUM_BIT = 0U,
194 IP_TUNNEL_ROUTING_BIT,
195 IP_TUNNEL_KEY_BIT,
196 IP_TUNNEL_SEQ_BIT,
197 IP_TUNNEL_STRICT_BIT,
198 IP_TUNNEL_REC_BIT,
199 IP_TUNNEL_VERSION_BIT,
200 IP_TUNNEL_NO_KEY_BIT,
201 IP_TUNNEL_DONT_FRAGMENT_BIT,
202 IP_TUNNEL_OAM_BIT,
203 IP_TUNNEL_CRIT_OPT_BIT,
204 IP_TUNNEL_GENEVE_OPT_BIT, /* OPTIONS_PRESENT */
205 IP_TUNNEL_VXLAN_OPT_BIT, /* OPTIONS_PRESENT */
206 IP_TUNNEL_NOCACHE_BIT,
207 IP_TUNNEL_ERSPAN_OPT_BIT, /* OPTIONS_PRESENT */
208 IP_TUNNEL_GTP_OPT_BIT, /* OPTIONS_PRESENT */
209
210 IP_TUNNEL_VTI_BIT,
211 IP_TUNNEL_SIT_ISATAP_BIT = IP_TUNNEL_VTI_BIT,
212
213 /* Flags starting from here are not available via the old UAPI */
214 IP_TUNNEL_PFCP_OPT_BIT, /* OPTIONS_PRESENT */
215
216 __IP_TUNNEL_FLAG_NUM,
217};
218
219#endif /* _IF_TUNNEL_H_ */