summaryrefslogtreecommitdiffstats
path: root/src/vnet/l3_types.h
blob: 28b0891e7155b78ea18183bfd329c8d570c07f59 (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
/*
 * Copyright (c) 2015 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.
 */
/*
 * l3_types.h: layer 3 packet types
 *
 * Copyright (c) 2010 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_vnet_l3_types_h
#define included_vnet_l3_types_h

/* Inherit generic L3 packet types from ethernet. */
typedef enum
{
#define ethernet_type(n,f) VNET_L3_PACKET_TYPE_##f,
#include <vnet/ethernet/types.def>
#undef ethernet_type
} vnet_l3_packet_type_t;

#endif /* included_vnet_l3_types_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
-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. */ #define foreach_gre_protocol \ _ (0x0800, ip4) \ _ (0x86DD, ip6) \ _ (0x6558, teb) \ _ (0x0806, arp) \ _ (0x8847, mpls_unicast) \ _ (0x88BE, erspan) \ _ (0x894F, nsh) typedef enum { #define _(n,f) GRE_PROTOCOL_##f = n, foreach_gre_protocol #undef _ } gre_protocol_t; typedef struct { /* flags and version */ u16 flags_and_version; /* unimplemented at the moment */ #define GRE_FLAGS_CHECKSUM (1 << 15) /* deprecated, according to rfc2784 */ #define GRE_FLAGS_ROUTING (1 << 14) #define GRE_FLAGS_KEY (1 << 13) #define GRE_FLAGS_SEQUENCE (1 << 12) #define GRE_FLAGS_STRICT_SOURCE_ROUTE (1 << 11) /* version 1 is PPTP which we don't support */ #define GRE_SUPPORTED_VERSION 0 #define GRE_VERSION_MASK 0x7 /* 0x800 for ip4, etc. */ u16 protocol; } gre_header_t; /* From draft-foschiano-erspan-03.txt Different frame variants known as "ERSPAN Types" can be distinguished based on the GRE "Protocol Type" field value: Type I and II's value is 0x88BE while Type III's is 0x22EB [ETYPES]. GRE header for ERSPAN Type II encapsulation (8 octets [34:41]) 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |0|0|0|1|0|00000|000000000|00000| Protocol Type for ERSPAN | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Sequence Number (increments per packet per session) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Note that in the above GRE header [RFC1701] out of the C, R, K, S, s, Recur, Flags, Version fields only S (bit 03) may be set to 1. The other fields are always set to zero. ERSPAN Type II's frame format also adds a special 8-octet ERSPAN "feature" header on top of the MAC/IPv4/GRE headers to enclose the raw mirrored frames. The ERSPAN Type II feature header is described below: ERSPAN Type II header (8 octets [42:49]) 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Ver | VLAN | COS | En|T| Session ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | Index | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The various fields of the above header are described in this table: Field Position Length Definition [octet:bit] (bits) Ver [42:0] 4 ERSPAN Encapsulation version. This indicates the version of the ERSPAN encapsulation specification. Set to 0x1 for Type II. VLAN [42:4] 12 Original VLAN of the frame, mirrored from the source. If the En field is set to 11, the value of VLAN is undefined. COS [44:0] 3 Original class of service of the frame, mirrored from the source. En [44:3] 2 The trunk encapsulation type associated with the ERSPAN source port for ingress ERSPAN traffic. The possible values are: 00-originally without VLAN tag 01-originally ISL encapsulated 10-originally 802.1Q encapsulated 11-VLAN tag preserved in frame. T [44:5] 1 This bit indicates that the frame copy encapsulated in the ERSPAN packet has been truncated. This occurs if the ERSPAN encapsulated frame exceeds the configured MTU. Session ID [44:6] 10 Identification associated with (ERSPAN ID) each ERSPAN session. Must be unique between the source and the receiver(s). (See section below.) Reserved [46:0] 12 All bits are set to zero Index [47:4] 20 A 20 bit index/port number associated with the ERSPAN traffic's port and direction (ingress/egress). N.B.: This field is platform dependent. */ /* *INDENT-OFF* */ typedef CLIB_PACKED (struct { u32 seq_num; union { struct { u16 ver_vlan; u16 cos_en_t_session; u32 res_index; } t2; u64 t2_u64; }; }) erspan_t2_t; typedef CLIB_PACKED (struct { gre_header_t gre; erspan_t2_t erspan; }) erspan_t2_header_t; /* *INDENT-ON* */ /* u64 template for ERSPAN type 2 header with both EN bits set */ #define ERSPAN_HDR2 0x1000180000000000ul #endif /* included_vnet_gre_packet_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */