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e496b42030
bgpd already supports BGP Prefix-SID path attribute and there are some sub-types of Prefix-SID path attribute. This commits makes bgpd to support additional sub-types. sub-Type-4 and sub-Type-5 for construct the VPNv4 SRv6 backend with vpnv4-unicast address family. This path attributes is already supported by Ciscos IOS-XR and NX-OS. Prefix-SID sub-Type-4 and sub-Type-5 is defined on following IETF-drafts. Supports(A-part-of): - https://tools.ietf.org/html/draft-dawra-idr-srv6-vpn-04 - https://tools.ietf.org/html/draft-dawra-idr-srv6-vpn-05 Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
/*
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* SRv6 definitions
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* Copyright (C) 2020 Hiroki Shirokura, LINE Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _FRR_SRV6_H
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#define _FRR_SRV6_H
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#include <zebra.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#define SRV6_MAX_SIDS 16
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define sid2str(sid, str, size) \
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inet_ntop(AF_INET6, sid, str, size)
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enum seg6_mode_t {
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INLINE,
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ENCAP,
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L2ENCAP,
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};
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enum seg6local_action_t {
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ZEBRA_SEG6_LOCAL_ACTION_UNSPEC = 0,
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ZEBRA_SEG6_LOCAL_ACTION_END = 1,
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ZEBRA_SEG6_LOCAL_ACTION_END_X = 2,
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ZEBRA_SEG6_LOCAL_ACTION_END_T = 3,
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ZEBRA_SEG6_LOCAL_ACTION_END_DX2 = 4,
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ZEBRA_SEG6_LOCAL_ACTION_END_DX6 = 5,
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ZEBRA_SEG6_LOCAL_ACTION_END_DX4 = 6,
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ZEBRA_SEG6_LOCAL_ACTION_END_DT6 = 7,
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ZEBRA_SEG6_LOCAL_ACTION_END_DT4 = 8,
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ZEBRA_SEG6_LOCAL_ACTION_END_B6 = 9,
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ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP = 10,
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ZEBRA_SEG6_LOCAL_ACTION_END_BM = 11,
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ZEBRA_SEG6_LOCAL_ACTION_END_S = 12,
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ZEBRA_SEG6_LOCAL_ACTION_END_AS = 13,
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ZEBRA_SEG6_LOCAL_ACTION_END_AM = 14,
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ZEBRA_SEG6_LOCAL_ACTION_END_BPF = 15,
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};
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struct seg6_segs {
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size_t num_segs;
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struct in6_addr segs[256];
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};
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struct seg6local_context {
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struct in_addr nh4;
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struct in6_addr nh6;
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uint32_t table;
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};
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static inline const char *seg6_mode2str(enum seg6_mode_t mode)
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{
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switch (mode) {
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case INLINE:
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return "INLINE";
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case ENCAP:
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return "ENCAP";
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case L2ENCAP:
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return "L2ENCAP";
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default:
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return "unknown";
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}
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}
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static inline bool sid_same(
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const struct in6_addr *a,
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const struct in6_addr *b)
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{
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if (!a && !b)
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return true;
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else if (!(a && b))
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return false;
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else
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return memcmp(a, b, sizeof(struct in6_addr)) == 0;
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}
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static inline bool sid_diff(
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const struct in6_addr *a,
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const struct in6_addr *b)
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{
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return !sid_same(a, b);
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}
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static inline bool sid_zero(
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const struct in6_addr *a)
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{
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struct in6_addr zero = {};
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return sid_same(a, &zero);
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}
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static inline void *sid_copy(struct in6_addr *dst,
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const struct in6_addr *src)
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{
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return memcpy(dst, src, sizeof(struct in6_addr));
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}
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const char *
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seg6local_action2str(uint32_t action);
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const char *
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seg6local_context2str(char *str, size_t size,
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struct seg6local_context *ctx, uint32_t action);
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int snprintf_seg6_segs(char *str,
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size_t size, const struct seg6_segs *segs);
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#ifdef __cplusplus
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}
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#endif
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#endif
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