diff options
Diffstat (limited to 'lib/srv6.h')
| -rw-r--r-- | lib/srv6.h | 84 |
1 files changed, 71 insertions, 13 deletions
diff --git a/lib/srv6.h b/lib/srv6.h index 0d3ee7d2ff..fb34f861c8 100644 --- a/lib/srv6.h +++ b/lib/srv6.h @@ -14,8 +14,11 @@ #include <arpa/inet.h> #include <netinet/in.h> -#define SRV6_MAX_SIDS 16 +#define SRV6_MAX_SIDS 16 +#define SRV6_MAX_SEGS 8 #define SRV6_LOCNAME_SIZE 256 +#define SRH_BASE_HEADER_LENGTH 8 +#define SRH_SEGMENT_LENGTH 16 #ifdef __cplusplus extern "C" { @@ -24,6 +27,16 @@ extern "C" { #define sid2str(sid, str, size) \ inet_ntop(AF_INET6, sid, str, size) +/* SRv6 flavors manipulation macros */ +#define CHECK_SRV6_FLV_OP(OPS,OP) ((OPS) & (1 << OP)) +#define SET_SRV6_FLV_OP(OPS,OP) (OPS) |= (1 << OP) +#define UNSET_SRV6_FLV_OP(OPS,OP) (OPS) &= ~(1 << OP) +#define RESET_SRV6_FLV_OP(OPS) (OPS) = 0 + +/* SRv6 Flavors default values */ +#define ZEBRA_DEFAULT_SEG6_LOCAL_FLV_LCBLOCK_LEN 32 +#define ZEBRA_DEFAULT_SEG6_LOCAL_FLV_LCNODE_FN_LEN 16 + enum seg6_mode_t { INLINE, ENCAP, @@ -50,15 +63,47 @@ enum seg6local_action_t { ZEBRA_SEG6_LOCAL_ACTION_END_DT46 = 16, }; +/* Flavor operations for SRv6 End* Behaviors */ +enum seg6local_flavor_op { + ZEBRA_SEG6_LOCAL_FLV_OP_UNSPEC = 0, + /* PSP Flavor as per RFC 8986 section #4.16.1 */ + ZEBRA_SEG6_LOCAL_FLV_OP_PSP = 1, + /* USP Flavor as per RFC 8986 section #4.16.2 */ + ZEBRA_SEG6_LOCAL_FLV_OP_USP = 2, + /* USD Flavor as per RFC 8986 section #4.16.3 */ + ZEBRA_SEG6_LOCAL_FLV_OP_USD = 3, + /* NEXT-C-SID Flavor as per draft-ietf-spring-srv6-srh-compression-03 + section 4.1 */ + ZEBRA_SEG6_LOCAL_FLV_OP_NEXT_CSID = 4, +}; + +#define SRV6_SEG_STRLEN 1024 + struct seg6_segs { size_t num_segs; struct in6_addr segs[256]; }; +struct seg6local_flavors_info { + /* Flavor operations */ + uint32_t flv_ops; + + /* Locator-Block length, expressed in bits */ + uint8_t lcblock_len; + /* Locator-Node Function length, expressed in bits */ + uint8_t lcnode_func_len; +}; + +struct seg6_seg_stack { + uint8_t num_segs; + struct in6_addr seg[0]; /* 1 or more segs */ +}; + struct seg6local_context { struct in_addr nh4; struct in6_addr nh6; uint32_t table; + struct seg6local_flavors_info flv; }; struct srv6_locator { @@ -115,14 +160,18 @@ struct srv6_locator_chunk { * https://www.iana.org/assignments/segment-routing/segment-routing.xhtml */ enum srv6_endpoint_behavior_codepoint { - SRV6_ENDPOINT_BEHAVIOR_RESERVED = 0x0000, - SRV6_ENDPOINT_BEHAVIOR_END_DT6 = 0x0012, - SRV6_ENDPOINT_BEHAVIOR_END_DT4 = 0x0013, - SRV6_ENDPOINT_BEHAVIOR_END_DT46 = 0x0014, - SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID = 0x003E, - SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID = 0x003F, - SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID = 0x0040, - SRV6_ENDPOINT_BEHAVIOR_OPAQUE = 0xFFFF, + SRV6_ENDPOINT_BEHAVIOR_RESERVED = 0x0000, + SRV6_ENDPOINT_BEHAVIOR_END = 0x0001, + SRV6_ENDPOINT_BEHAVIOR_END_X = 0x0005, + SRV6_ENDPOINT_BEHAVIOR_END_DT6 = 0x0012, + SRV6_ENDPOINT_BEHAVIOR_END_DT4 = 0x0013, + SRV6_ENDPOINT_BEHAVIOR_END_DT46 = 0x0014, + SRV6_ENDPOINT_BEHAVIOR_END_NEXT_CSID = 0x002B, + SRV6_ENDPOINT_BEHAVIOR_END_X_NEXT_CSID = 0x002C, + SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID = 0x003E, + SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID = 0x003F, + SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID = 0x0040, + SRV6_ENDPOINT_BEHAVIOR_OPAQUE = 0xFFFF, }; struct nexthop_srv6 { @@ -131,7 +180,7 @@ struct nexthop_srv6 { struct seg6local_context seg6local_ctx; /* SRv6 Headend-behaviour */ - struct in6_addr seg6_segs; + struct seg6_seg_stack *seg6_segs; }; static inline const char *seg6_mode2str(enum seg6_mode_t mode) @@ -167,12 +216,21 @@ static inline bool sid_diff( return !sid_same(a, b); } -static inline bool sid_zero( - const struct in6_addr *a) + +static inline bool sid_zero(const struct seg6_seg_stack *a) +{ + struct in6_addr zero = {}; + + assert(a); + + return sid_same(&a->seg[0], &zero); +} + +static inline bool sid_zero_ipv6(const struct in6_addr *a) { struct in6_addr zero = {}; - return sid_same(a, &zero); + return sid_same(&a[0], &zero); } static inline void *sid_copy(struct in6_addr *dst, |