FD.io VPP  v18.07-34-g55fbdb9
Vector Packet Processing
ipip.api
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1 /*
2  * Copyright (c) 2018 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 /**
17  * The IPIP module implements IP{v4,v6} over IP{v4,v6} tunnelling as
18  * described in RFC2473 and to some extent the largely historical
19  * RFC1853. The module also supports an IPv4 over IPv6 automatic
20  * tunnelling mechanism called 6RD (RFC5969).
21  *
22  * The IPIP API module supports a CRD model for adding, deleting and
23  * listing tunnels. A tunnel is represented as an interface in
24  * VPP. The "handle" representing a tunnel is the sw_if_index. As any
25  * interface, the user must configure an IPv4 and/or IPv6 address on
26  * the interface. This is the inner or payload protocol.
27  *
28  * Tunnel MTU: The tunnel MTU (the payload MTU) is configurable per
29  * protocol. If a tunnel MTU is larger than the path MTU, the outer
30  * packet will be fragmented. Fragmentation support is configurable,
31  * as it can have severe performance issues, and might be used as an
32  * attack vector (the remote side must reassemble.)
33  *
34  * Traffic class / TOS field can either be configured to a fixed
35  * value, or can be copied from the inner to the outer header.
36  * (For now we have stolen ~0 to indicate copy).
37  *
38  * Note:
39  *
40  * - The Tunnel encapsulation limit described in RFC2473 is not
41  * implemented.
42  *
43  * - ICMP proxying, as in a tunnel head-end receiving ICMP erors on
44  * the outer packet is currently not relayed to the original source
45  * of the packet.
46  *
47  * - PMTUD / MTU probing and tunnel keepalives are not yet implemented.
48  *
49  */
50 
51 option version = "1.1.0";
52 
53 /**
54  * Create an IP{v4,v6} over IP{v4,v6} tunnel.
55  */
57 {
61  u32 instance; /* If non-~0, specifies a custom dev instance */
62  u8 src_address[16];
63  u8 dst_address[16];
65  u8 tc_tos; /* If ~0, the TOS/TC value is copied from
66  inner packet, otherwise set to value */
67 };
68 
69 define ipip_add_tunnel_reply
70 {
74 };
75 
76 /**
77  * Delete an IP{v4,v6} over IP{v4,v6} tunnel.
78  */
79 autoreply define ipip_del_tunnel
80 {
84 };
85 
86 /**
87  * Create an IPv4 over IPv6 automatic tunnel (6RD)
88  */
89 define ipip_6rd_add_tunnel
90 {
95  u8 ip6_prefix[16];
96  u8 ip4_prefix[4];
97  u8 ip4_src[4];
101  u8 tc_tos; /* If ~0, the TOS/TC value is copied from
102  inner packet, otherwise set to value */
103 };
104 
105 define ipip_6rd_add_tunnel_reply
106 {
110 };
111 
112 /**
113  * Delete an IPv4 over IPv6 automatic tunnel (6RD)
114  */
115 autoreply define ipip_6rd_del_tunnel
116 {
120 };
121 
122 /**
123  * List all IPIP tunnels
124  */
125 define ipip_tunnel_dump
126 {
130 };
131 
132 define ipip_tunnel_details
133 {
138  u8 src_address[16];
139  u8 dst_address[16];
142 };
143 
144 /*
145  * Local Variables:
146  * eval: (c-set-style "gnu")
147  * End:
148  */
int ipip_add_tunnel(ipip_transport_t transport, u32 instance, ip46_address_t *src, ip46_address_t *dst, u32 fib_index, u8 tc_tos, u32 *sw_if_indexp)
Definition: ipip.c:463
unsigned char u8
Definition: types.h:56
option version
The IPIP module implements IP{v4,v6} over IP{v4,v6} tunnelling as described in RFC2473 and to some ex...
Definition: ipip.api:51
unsigned int u32
Definition: types.h:88
signed int i32
Definition: types.h:81
int ipip_del_tunnel(u32 sw_if_index)
Definition: ipip.c:562