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Diffstat (limited to 'vnet/vnet/sr/sr_packet.h')
| -rw-r--r-- | vnet/vnet/sr/sr_packet.h | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/vnet/vnet/sr/sr_packet.h b/vnet/vnet/sr/sr_packet.h deleted file mode 100644 index 179b94c2dc7..00000000000 --- a/vnet/vnet/sr/sr_packet.h +++ /dev/null @@ -1,251 +0,0 @@ -#ifndef included_vnet_sr_packet_h -#define included_vnet_sr_packet_h - -#include <vnet/ip/ip.h> - -/* - * ipv6 segment-routing header format - * - * Copyright (c) 2013 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. - */ - -/** - * @file - * @brief The Segment Routing Header (SRH). - * - * The Segment Routing Header (SRH) is defined in the diagram below. - * - * - * 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 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | Next Header | Hdr Ext Len | Routing Type | Segments Left | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | First Segment | Flags | HMAC Key ID | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | Segment List[0] (128 bits ipv6 address) | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | | - * ... - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | Segment List[n] (128 bits ipv6 address) | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | Policy List[0] (optional) | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | Policy List[1] (optional) | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | Policy List[2] (optional) | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * | | - * | | - * | | - * | HMAC (256 bits) | - * | (optional) | - * | | - * | | - * | | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * - * where: - * - * o Next Header: 8-bit selector. Identifies the type of header - * immediately following the SRH. - * - * o Hdr Ext Len: 8-bit unsigned integer, is the length of the SRH - * header in 8-octet units, not including the first 8 octets. - * - * o Routing Type: TBD, to be assigned by IANA (suggested value: 4). - * - * o Segments Left. Defined in [RFC2460], it contains the index, in - * the Segment List, of the next segment to inspect. Segments Left - * is decremented at each segment and it is used as an index in the - * segment list. - * - * o First Segment: offset in the SRH, not including the first 8 octets - * and expressed in 16-octet units, pointing to the last element of - * the segment list, which is in fact the first segment of the - * segment routing path. - * - * o Flags: 16 bits of flags. Following flags are defined: - * - * 1 - * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * |C|P|R|R| Policy Flags | - * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - * - * C-flag: Clean-up flag. Set when the SRH has to be removed from - * the packet when packet reaches the last segment. - * - * P-flag: Protected flag. Set when the packet has been rerouted - * through FRR mechanism by a SR endpoint node. See Section 6.3 - * for more details. - * - * R-flags. Reserved and for future use. - * - * Policy Flags. Define the type of the IPv6 addresses encoded - * into the Policy List (see below). The following have been - * defined: - * - * Bits 4-6: determine the type of the first element after the - * segment list. - * - * Bits 7-9: determine the type of the second element. - * - * Bits 10-12: determine the type of the third element. - * - * Bits 13-15: determine the type of the fourth element. - * - * The following values are used for the type: - * - * 0x0: Not present. If value is set to 0x0, it means the - * element represented by these bits is not present. - * - * 0x1: SR Ingress. - * - * 0x2: SR Egress. - * - * 0x3: Original Source Address. - * - * o HMAC Key ID and HMAC field, and their use are defined in - * [I-D.vyncke-6man-segment-routing-security]. - * - * o Segment List[n]: 128 bit IPv6 addresses representing the nth - * segment in the Segment List. The Segment List is encoded starting - * from the last segment of the path. I.e., the first element of the - * segment list (Segment List [0]) contains the last segment of the - * path while the last segment of the Segment List (Segment List[n]) - * contains the first segment of the path. The index contained in - * "Segments Left" identifies the current active segment. - * - * o Policy List. Optional addresses representing specific nodes in - * the SR path such as: - * - * SR Ingress: a 128 bit generic identifier representing the - * ingress in the SR domain (i.e.: it needs not to be a valid IPv6 - * address). - * - * SR Egress: a 128 bit generic identifier representing the egress - * in the SR domain (i.e.: it needs not to be a valid IPv6 - * address). - * - * Original Source Address: IPv6 address originally present in the - * SA field of the packet. - * - * The segments in the Policy List are encoded after the segment list - * and they are optional. If none are in the SRH, all bits of the - * Policy List Flags MUST be set to 0x0. - */ - -#ifndef IPPROTO_IPV6_ROUTE -#define IPPROTO_IPV6_ROUTE 43 -#endif - -#define ROUTING_HEADER_TYPE_SR 4 -/** - @brief SR header struct. -*/ -typedef struct -{ - /** Protocol for next header. */ - u8 protocol; - - /** - * Length of routing header in 8 octet units, - * not including the first 8 octets - */ - u8 length; - - /** Type of routing header; type 4 = segement routing */ - u8 type; - - /** Next segment in the segment list */ - u8 segments_left; - - /** - * Policy list pointer: offset in the SRH of the policy - * list - in 16-octet units - not including the first 8 octets. - */ - u8 first_segment; - - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_CLEANUP (0x8000) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_PROTECTED (0x4000) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_RESERVED (0x3000) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_PL_ELT_NOT_PRESENT (0x0) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_PL_ELT_INGRESS_PE (0x1) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_PL_ELT_EGRESS_PE (0x2) - /** Flag bits */ -#define IP6_SR_HEADER_FLAG_PL_ELT_ORIG_SRC_ADDR (0x3) - /** values 0x4 - 0x7 are reserved */ - u16 flags; - u8 hmac_key; - - /** The segment + policy list elts */ - ip6_address_t segments[0]; -} __attribute__ ((packed)) ip6_sr_header_t; - -static inline int -ip6_sr_policy_list_shift_from_index (int pl_index) -{ - return (-3 * pl_index) + 12; -} - -/** pl_index is one-origined */ -static inline int -ip6_sr_policy_list_flags (u16 flags_host_byte_order, int pl_index) -{ - int shift; - - if (pl_index <= 0 || pl_index > 4) - return 0; - - shift = (-3 * pl_index) + 12; - flags_host_byte_order >>= shift; - - return (flags_host_byte_order & 7); -} - -#endif /* included_vnet_sr_packet_h */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |