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Diffstat (limited to '')
| -rw-r--r-- | lib/srv6.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/lib/srv6.h b/lib/srv6.h new file mode 100644 index 0000000..e0db30c --- /dev/null +++ b/lib/srv6.h @@ -0,0 +1,200 @@ +/* + * SRv6 definitions + * Copyright (C) 2020 Hiroki Shirokura, LINE Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _FRR_SRV6_H +#define _FRR_SRV6_H + +#include <zebra.h> +#include "prefix.h" +#include "json.h" + +#include <arpa/inet.h> +#include <netinet/in.h> + +#define SRV6_MAX_SIDS 16 +#define SRV6_LOCNAME_SIZE 256 + +#ifdef __cplusplus +extern "C" { +#endif + +#define sid2str(sid, str, size) \ + inet_ntop(AF_INET6, sid, str, size) + +enum seg6_mode_t { + INLINE, + ENCAP, + L2ENCAP, +}; + +enum seg6local_action_t { + ZEBRA_SEG6_LOCAL_ACTION_UNSPEC = 0, + ZEBRA_SEG6_LOCAL_ACTION_END = 1, + ZEBRA_SEG6_LOCAL_ACTION_END_X = 2, + ZEBRA_SEG6_LOCAL_ACTION_END_T = 3, + ZEBRA_SEG6_LOCAL_ACTION_END_DX2 = 4, + ZEBRA_SEG6_LOCAL_ACTION_END_DX6 = 5, + ZEBRA_SEG6_LOCAL_ACTION_END_DX4 = 6, + ZEBRA_SEG6_LOCAL_ACTION_END_DT6 = 7, + ZEBRA_SEG6_LOCAL_ACTION_END_DT4 = 8, + ZEBRA_SEG6_LOCAL_ACTION_END_B6 = 9, + ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP = 10, + ZEBRA_SEG6_LOCAL_ACTION_END_BM = 11, + ZEBRA_SEG6_LOCAL_ACTION_END_S = 12, + ZEBRA_SEG6_LOCAL_ACTION_END_AS = 13, + ZEBRA_SEG6_LOCAL_ACTION_END_AM = 14, + ZEBRA_SEG6_LOCAL_ACTION_END_BPF = 15, +}; + +struct seg6_segs { + size_t num_segs; + struct in6_addr segs[256]; +}; + +struct seg6local_context { + struct in_addr nh4; + struct in6_addr nh6; + uint32_t table; +}; + +struct srv6_locator { + char name[SRV6_LOCNAME_SIZE]; + struct prefix_ipv6 prefix; + + /* + * Bit length of SRv6 locator described in + * draft-ietf-bess-srv6-services-05#section-3.2.1 + */ + uint8_t block_bits_length; + uint8_t node_bits_length; + uint8_t function_bits_length; + uint8_t argument_bits_length; + + int algonum; + uint64_t current; + bool status_up; + struct list *chunks; + + QOBJ_FIELDS; +}; +DECLARE_QOBJ_TYPE(srv6_locator); + +struct srv6_locator_chunk { + char locator_name[SRV6_LOCNAME_SIZE]; + struct prefix_ipv6 prefix; + + /* + * Bit length of SRv6 locator described in + * draft-ietf-bess-srv6-services-05#section-3.2.1 + */ + uint8_t block_bits_length; + uint8_t node_bits_length; + uint8_t function_bits_length; + uint8_t argument_bits_length; + + /* + * For Zclient communication values + */ + uint8_t keep; + uint8_t proto; + uint16_t instance; + uint32_t session_id; +}; + +struct nexthop_srv6 { + /* SRv6 localsid info for Endpoint-behaviour */ + enum seg6local_action_t seg6local_action; + struct seg6local_context seg6local_ctx; + + /* SRv6 Headend-behaviour */ + struct in6_addr seg6_segs; +}; + +static inline const char *seg6_mode2str(enum seg6_mode_t mode) +{ + switch (mode) { + case INLINE: + return "INLINE"; + case ENCAP: + return "ENCAP"; + case L2ENCAP: + return "L2ENCAP"; + default: + return "unknown"; + } +} + +static inline bool sid_same( + const struct in6_addr *a, + const struct in6_addr *b) +{ + if (!a && !b) + return true; + else if (!(a && b)) + return false; + else + return memcmp(a, b, sizeof(struct in6_addr)) == 0; +} + +static inline bool sid_diff( + const struct in6_addr *a, + const struct in6_addr *b) +{ + return !sid_same(a, b); +} + +static inline bool sid_zero( + const struct in6_addr *a) +{ + struct in6_addr zero = {}; + + return sid_same(a, &zero); +} + +static inline void *sid_copy(struct in6_addr *dst, + const struct in6_addr *src) +{ + return memcpy(dst, src, sizeof(struct in6_addr)); +} + +const char * +seg6local_action2str(uint32_t action); + +const char *seg6local_context2str(char *str, size_t size, + const struct seg6local_context *ctx, + uint32_t action); + +int snprintf_seg6_segs(char *str, + size_t size, const struct seg6_segs *segs); + +extern struct srv6_locator *srv6_locator_alloc(const char *name); +extern struct srv6_locator_chunk *srv6_locator_chunk_alloc(void); +extern void srv6_locator_free(struct srv6_locator *locator); +extern void srv6_locator_chunk_free(struct srv6_locator_chunk *chunk); +json_object *srv6_locator_chunk_json(const struct srv6_locator_chunk *chunk); +json_object *srv6_locator_json(const struct srv6_locator *loc); +json_object *srv6_locator_detailed_json(const struct srv6_locator *loc); +json_object * +srv6_locator_chunk_detailed_json(const struct srv6_locator_chunk *chunk); + +#ifdef __cplusplus +} +#endif + +#endif |