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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
commit | 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 (patch) | |
tree | c05dc0f8e6aa3accc84e3e5cffc933ed94941383 /lib/prefix.h | |
parent | Initial commit. (diff) | |
download | frr-upstream/8.4.4.tar.xz frr-upstream/8.4.4.zip |
Adding upstream version 8.4.4.upstream/8.4.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/prefix.h | 686 |
1 files changed, 686 insertions, 0 deletions
diff --git a/lib/prefix.h b/lib/prefix.h new file mode 100644 index 0000000..b904311 --- /dev/null +++ b/lib/prefix.h @@ -0,0 +1,686 @@ +/* + * Prefix structure. + * Copyright (C) 1998 Kunihiro Ishiguro + * + * This file is part of GNU Zebra. + * + * GNU Zebra 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, or (at your option) any + * later version. + * + * GNU Zebra 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 _ZEBRA_PREFIX_H +#define _ZEBRA_PREFIX_H + +#ifdef GNU_LINUX +#include <net/ethernet.h> +#else +#include <netinet/if_ether.h> +#endif +#include "sockunion.h" +#include "ipaddr.h" +#include "compiler.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef ETH_ALEN +#define ETH_ALEN 6 +#endif + +/* EVPN route types. */ +typedef enum { + BGP_EVPN_AD_ROUTE = 1, /* Ethernet Auto-Discovery (A-D) route */ + BGP_EVPN_MAC_IP_ROUTE, /* MAC/IP Advertisement route */ + BGP_EVPN_IMET_ROUTE, /* Inclusive Multicast Ethernet Tag route */ + BGP_EVPN_ES_ROUTE, /* Ethernet Segment route */ + BGP_EVPN_IP_PREFIX_ROUTE, /* IP Prefix route */ +} bgp_evpn_route_type; + +/* value of first byte of ESI */ +#define ESI_TYPE_ARBITRARY 0 /* */ +#define ESI_TYPE_LACP 1 /* <> */ +#define ESI_TYPE_BRIDGE 2 /* <Root bridge Mac-6B>:<Root Br Priority-2B>:00 */ +#define ESI_TYPE_MAC 3 /* <Syst Mac Add-6B>:<Local Discriminator Value-3B> */ +#define ESI_TYPE_ROUTER 4 /* <RouterId-4B>:<Local Discriminator Value-4B> */ +#define ESI_TYPE_AS 5 /* <AS-4B>:<Local Discriminator Value-4B> */ + +#define MAX_ESI {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} + + +#define EVPN_ETH_TAG_BYTES 4 +#define ESI_BYTES 10 +#define ESI_STR_LEN (3 * ESI_BYTES) +#define EVPN_DF_ALG_STR_LEN 24 + +/* Maximum number of VTEPs per-ES - + * XXX - temporary limit for allocating strings etc. + */ +#define ES_VTEP_MAX_CNT 10 +#define ES_VTEP_LIST_STR_SZ (ES_VTEP_MAX_CNT * 16) + +#define ETHER_ADDR_STRLEN (3*ETH_ALEN) +/* + * there isn't a portable ethernet address type. We define our + * own to simplify internal handling + */ +struct ethaddr { + uint8_t octet[ETH_ALEN]; +} __attribute__((packed)); + + +/* length is the number of valuable bits of prefix structure +* 18 bytes is current length in structure, if address is ipv4 +* 30 bytes is in case of ipv6 +*/ +#define PREFIX_LEN_ROUTE_TYPE_5_IPV4 (18*8) +#define PREFIX_LEN_ROUTE_TYPE_5_IPV6 (30*8) + +typedef struct esi_t_ { + uint8_t val[ESI_BYTES]; +} esi_t; + +struct evpn_ead_addr { + esi_t esi; + uint32_t eth_tag; + struct ipaddr ip; + uint16_t frag_id; +}; + +struct evpn_macip_addr { + uint32_t eth_tag; + uint8_t ip_prefix_length; + struct ethaddr mac; + struct ipaddr ip; +}; + +struct evpn_imet_addr { + uint32_t eth_tag; + uint8_t ip_prefix_length; + struct ipaddr ip; +}; + +struct evpn_es_addr { + esi_t esi; + uint8_t ip_prefix_length; + struct ipaddr ip; +}; + +struct evpn_prefix_addr { + uint32_t eth_tag; + uint8_t ip_prefix_length; + struct ipaddr ip; +}; + +/* EVPN address (RFC 7432) */ +struct evpn_addr { + uint8_t route_type; + union { + struct evpn_ead_addr _ead_addr; + struct evpn_macip_addr _macip_addr; + struct evpn_imet_addr _imet_addr; + struct evpn_es_addr _es_addr; + struct evpn_prefix_addr _prefix_addr; + } u; +#define ead_addr u._ead_addr +#define macip_addr u._macip_addr +#define imet_addr u._imet_addr +#define es_addr u._es_addr +#define prefix_addr u._prefix_addr +}; + +/* + * A struct prefix contains an address family, a prefix length, and an + * address. This can represent either a 'network prefix' as defined + * by CIDR, where the 'host bits' of the prefix are 0 + * (e.g. AF_INET:10.0.0.0/8), or an address and netmask + * (e.g. AF_INET:10.0.0.9/8), such as might be configured on an + * interface. + */ + +/* different OSes use different names */ +#if defined(AF_PACKET) +#define AF_ETHERNET AF_PACKET +#else +#if defined(AF_LINK) +#define AF_ETHERNET AF_LINK +#endif +#endif + +/* The 'family' in the prefix structure is internal to FRR and need not + * map to standard OS AF_ definitions except where needed for interacting + * with the kernel. However, AF_ definitions are currently in use and + * prevalent across the code. Define a new FRR-specific AF for EVPN to + * distinguish between 'ethernet' (MAC-only) and 'evpn' prefixes and + * ensure it does not conflict with any OS AF_ definition. + */ +#if !defined(AF_EVPN) +#define AF_EVPN (AF_MAX + 1) +#endif + +#if !defined(AF_FLOWSPEC) +#define AF_FLOWSPEC (AF_MAX + 2) +#endif + +struct flowspec_prefix { + uint8_t family; + uint16_t prefixlen; /* length in bytes */ + uintptr_t ptr; +}; + +/* FRR generic prefix structure. */ +struct prefix { + uint8_t family; + uint16_t prefixlen; + union { + uint8_t prefix; + struct in_addr prefix4; + struct in6_addr prefix6; + struct { + struct in_addr id; + struct in_addr adv_router; + } lp; + struct ethaddr prefix_eth; /* AF_ETHERNET */ + uint8_t val[16]; + uint32_t val32[4]; + uintptr_t ptr; + struct evpn_addr prefix_evpn; /* AF_EVPN */ + struct flowspec_prefix prefix_flowspec; /* AF_FLOWSPEC */ + } u __attribute__((aligned(8))); +}; + +/* IPv4 prefix structure. */ +struct prefix_ipv4 { + uint8_t family; + uint16_t prefixlen; + struct in_addr prefix __attribute__((aligned(8))); +}; + +/* IPv6 prefix structure. */ +struct prefix_ipv6 { + uint8_t family; + uint16_t prefixlen; + struct in6_addr prefix __attribute__((aligned(8))); +}; + +struct prefix_ls { + uint8_t family; + uint16_t prefixlen; + struct in_addr id __attribute__((aligned(8))); + struct in_addr adv_router; +}; + +/* Prefix for routing distinguisher. */ +struct prefix_rd { + uint8_t family; + uint16_t prefixlen; + uint8_t val[8] __attribute__((aligned(8))); +}; + +/* Prefix for ethernet. */ +struct prefix_eth { + uint8_t family; + uint16_t prefixlen; + struct ethaddr eth_addr __attribute__((aligned(8))); /* AF_ETHERNET */ +}; + +/* EVPN prefix structure. */ +struct prefix_evpn { + uint8_t family; + uint16_t prefixlen; + struct evpn_addr prefix __attribute__((aligned(8))); +}; + +static inline int is_evpn_prefix_ipaddr_none(const struct prefix_evpn *evp) +{ + if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE) + return IS_IPADDR_NONE(&(evp)->prefix.ead_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) + return IS_IPADDR_NONE(&(evp)->prefix.macip_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE) + return IS_IPADDR_NONE(&(evp)->prefix.imet_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE) + return IS_IPADDR_NONE(&(evp)->prefix.es_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) + return IS_IPADDR_NONE(&(evp)->prefix.prefix_addr.ip); + return 0; +} + +static inline int is_evpn_prefix_ipaddr_v4(const struct prefix_evpn *evp) +{ + if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE) + return IS_IPADDR_V4(&(evp)->prefix.ead_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) + return IS_IPADDR_V4(&(evp)->prefix.macip_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE) + return IS_IPADDR_V4(&(evp)->prefix.imet_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE) + return IS_IPADDR_V4(&(evp)->prefix.es_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) + return IS_IPADDR_V4(&(evp)->prefix.prefix_addr.ip); + return 0; +} + +static inline int is_evpn_prefix_ipaddr_v6(const struct prefix_evpn *evp) +{ + if (evp->prefix.route_type == BGP_EVPN_AD_ROUTE) + return IS_IPADDR_V6(&(evp)->prefix.ead_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE) + return IS_IPADDR_V6(&(evp)->prefix.macip_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IMET_ROUTE) + return IS_IPADDR_V6(&(evp)->prefix.imet_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_ES_ROUTE) + return IS_IPADDR_V6(&(evp)->prefix.es_addr.ip); + if (evp->prefix.route_type == BGP_EVPN_IP_PREFIX_ROUTE) + return IS_IPADDR_V6(&(evp)->prefix.prefix_addr.ip); + return 0; +} + +/* Prefix for a Flowspec entry */ +struct prefix_fs { + uint8_t family; + uint16_t prefixlen; /* unused */ + struct flowspec_prefix prefix __attribute__((aligned(8))); +}; + +struct prefix_sg { + uint8_t family; + uint16_t prefixlen; + struct in_addr src __attribute__((aligned(8))); + struct in_addr grp; +}; + +/* helper to get type safety/avoid casts on calls + * (w/o this, functions accepting all prefix types need casts on the caller + * side, which strips type safety since the cast will accept any pointer + * type.) + */ +#ifndef __cplusplus +#define prefixtype(uname, typename, fieldname) \ + typename *fieldname; +#define TRANSPARENT_UNION __attribute__((transparent_union)) +#else +#define prefixtype(uname, typename, fieldname) \ + typename *fieldname; \ + uname(typename *x) { this->fieldname = x; } +#define TRANSPARENT_UNION +#endif + +union prefixptr { + prefixtype(prefixptr, struct prefix, p) + prefixtype(prefixptr, struct prefix_ipv4, p4) + prefixtype(prefixptr, struct prefix_ipv6, p6) + prefixtype(prefixptr, struct prefix_evpn, evp) + prefixtype(prefixptr, struct prefix_fs, fs) + prefixtype(prefixptr, struct prefix_rd, rd) +} TRANSPARENT_UNION; + +union prefixconstptr { + prefixtype(prefixconstptr, const struct prefix, p) + prefixtype(prefixconstptr, const struct prefix_ipv4, p4) + prefixtype(prefixconstptr, const struct prefix_ipv6, p6) + prefixtype(prefixconstptr, const struct prefix_evpn, evp) + prefixtype(prefixconstptr, const struct prefix_fs, fs) + prefixtype(prefixconstptr, const struct prefix_rd, rd) +} TRANSPARENT_UNION; + +#ifndef INET_ADDRSTRLEN +#define INET_ADDRSTRLEN 16 +#endif /* INET_ADDRSTRLEN */ + +#ifndef INET6_ADDRSTRLEN +/* dead:beef:dead:beef:dead:beef:dead:beef + \0 */ +#define INET6_ADDRSTRLEN 46 +#endif /* INET6_ADDRSTRLEN */ + +#ifndef INET6_BUFSIZ +#define INET6_BUFSIZ 53 +#endif /* INET6_BUFSIZ */ + +/* Maximum string length of the result of prefix2str */ +#define PREFIX_STRLEN 80 + +/* + * Longest possible length of a (S,G) string is 34 bytes + * 123.123.123.123 = 15 * 2 + * (,) = 3 + * NULL Character at end = 1 + * (123.123.123.123,123.123.123.123) + */ +#define PREFIX_SG_STR_LEN 34 + +/* Max bit/byte length of IPv4 address. */ +#define IPV4_MAX_BYTELEN 4 +#define IPV4_MAX_BITLEN 32 +#define IPV4_ADDR_CMP(D,S) memcmp ((D), (S), IPV4_MAX_BYTELEN) + +static inline bool ipv4_addr_same(const struct in_addr *a, + const struct in_addr *b) +{ + return (a->s_addr == b->s_addr); +} +#define IPV4_ADDR_SAME(A,B) ipv4_addr_same((A), (B)) + +static inline void ipv4_addr_copy(struct in_addr *dst, + const struct in_addr *src) +{ + dst->s_addr = src->s_addr; +} +#define IPV4_ADDR_COPY(D,S) ipv4_addr_copy((D), (S)) + +#define IPV4_NET0(a) ((((uint32_t)(a)) & 0xff000000) == 0x00000000) +#define IPV4_NET127(a) ((((uint32_t)(a)) & 0xff000000) == 0x7f000000) +#define IPV4_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffff0000) == 0xa9fe0000) +#define IPV4_CLASS_D(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000) +#define IPV4_CLASS_E(a) ((((uint32_t)(a)) & 0xf0000000) == 0xf0000000) +#define IPV4_CLASS_DE(a) ((((uint32_t)(a)) & 0xe0000000) == 0xe0000000) +#define IPV4_MC_LINKLOCAL(a) ((((uint32_t)(a)) & 0xffffff00) == 0xe0000000) + +/* Max bit/byte length of IPv6 address. */ +#define IPV6_MAX_BYTELEN 16 +#define IPV6_MAX_BITLEN 128 +#define IPV6_ADDR_CMP(D,S) memcmp ((D), (S), IPV6_MAX_BYTELEN) +#define IPV6_ADDR_SAME(D,S) (memcmp ((D), (S), IPV6_MAX_BYTELEN) == 0) +#define IPV6_ADDR_COPY(D,S) memcpy ((D), (S), IPV6_MAX_BYTELEN) + +/* Count prefix size from mask length */ +#define PSIZE(a) (((a) + 7) / (8)) + +#define BSIZE(a) ((a) * (8)) + +/* Prefix's family member. */ +#define PREFIX_FAMILY(p) ((p)->family) + +/* glibc defines s6_addr32 to __in6_u.__u6_addr32 if __USE_{MISC || GNU} */ +#ifndef s6_addr32 +#define s6_addr32 __u6_addr.__u6_addr32 +#endif /*s6_addr32*/ + +/* Prototypes. */ +extern int str2family(const char *); +extern int afi2family(afi_t); +extern afi_t family2afi(int); +extern const char *family2str(int family); +extern const char *safi2str(safi_t safi); +extern const char *afi2str(afi_t afi); + +static inline afi_t prefix_afi(union prefixconstptr pu) +{ + return family2afi(pu.p->family); +} + +/* + * Check bit of the prefix. + * + * prefix + * byte buffer + * + * bit_index + * which bit to fetch from byte buffer, 0 indexed. + */ +extern unsigned int prefix_bit(const uint8_t *prefix, const uint16_t bit_index); + +extern struct prefix *prefix_new(void); +extern void prefix_free(struct prefix **p); +/* + * Function to handle prefix_free being used as a del function. + */ +extern void prefix_free_lists(void *arg); +extern const char *prefix_family_str(union prefixconstptr pu); +extern int prefix_blen(union prefixconstptr pu); +extern int str2prefix(const char *, struct prefix *); + +#define PREFIX2STR_BUFFER PREFIX_STRLEN + +extern void prefix_mcast_inet4_dump(const char *onfail, struct in_addr addr, + char *buf, int buf_size); +extern const char *prefix_sg2str(const struct prefix_sg *sg, char *str); +extern const char *prefix2str(union prefixconstptr, char *, int); +extern int evpn_type5_prefix_match(const struct prefix *evpn_pfx, + const struct prefix *match_pfx); +extern int prefix_match(union prefixconstptr unet, union prefixconstptr upfx); +extern int prefix_match_network_statement(union prefixconstptr unet, + union prefixconstptr upfx); +extern int prefix_same(union prefixconstptr ua, union prefixconstptr ub); +extern int prefix_cmp(union prefixconstptr ua, union prefixconstptr ub); +extern int prefix_common_bits(union prefixconstptr ua, union prefixconstptr ub); +extern void prefix_copy(union prefixptr udst, union prefixconstptr usrc); +extern void apply_mask(union prefixptr pu); + +#ifdef __clang_analyzer__ +/* clang-SA doesn't understand transparent unions, making it think that the + * target of prefix_copy is uninitialized. So just memset the target. + * cf. https://bugs.llvm.org/show_bug.cgi?id=42811 + */ +#define prefix_copy(a, b) ({ memset(a, 0, sizeof(*a)); prefix_copy(a, b); }) +#endif + +extern struct prefix *sockunion2hostprefix(const union sockunion *, + struct prefix *p); +extern void prefix2sockunion(const struct prefix *, union sockunion *); + +extern int str2prefix_eth(const char *, struct prefix_eth *); + +extern struct prefix_ipv4 *prefix_ipv4_new(void); +extern void prefix_ipv4_free(struct prefix_ipv4 **p); +extern int str2prefix_ipv4(const char *, struct prefix_ipv4 *); +extern void apply_mask_ipv4(struct prefix_ipv4 *); + +extern int prefix_ipv4_any(const struct prefix_ipv4 *); +extern void apply_classful_mask_ipv4(struct prefix_ipv4 *); + +extern uint8_t ip_masklen(struct in_addr); +extern void masklen2ip(const int, struct in_addr *); +/* given the address of a host on a network and the network mask length, + * calculate the broadcast address for that network; + * special treatment for /31 according to RFC3021 section 3.3 */ +extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen); + +extern int netmask_str2prefix_str(const char *, const char *, char *, size_t); + +extern struct prefix_ipv6 *prefix_ipv6_new(void); +extern void prefix_ipv6_free(struct prefix_ipv6 **p); +extern int str2prefix_ipv6(const char *, struct prefix_ipv6 *); +extern void apply_mask_ipv6(struct prefix_ipv6 *); + +extern int ip6_masklen(struct in6_addr); +extern void masklen2ip6(const int, struct in6_addr *); + +extern int is_zero_mac(const struct ethaddr *mac); +extern bool is_mcast_mac(const struct ethaddr *mac); +extern bool is_bcast_mac(const struct ethaddr *mac); +extern int prefix_str2mac(const char *str, struct ethaddr *mac); +extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size); + +extern unsigned prefix_hash_key(const void *pp); + +extern int str_to_esi(const char *str, esi_t *esi); +extern char *esi_to_str(const esi_t *esi, char *buf, int size); +extern char *evpn_es_df_alg2str(uint8_t df_alg, char *buf, int buf_len); +extern void prefix_evpn_hexdump(const struct prefix_evpn *p); +extern bool ipv4_unicast_valid(const struct in_addr *addr); + +static inline int ipv6_martian(const struct in6_addr *addr) +{ + struct in6_addr localhost_addr; + + inet_pton(AF_INET6, "::1", &localhost_addr); + + if (IPV6_ADDR_SAME(&localhost_addr, addr)) + return 1; + + return 0; +} + +extern int macstr2prefix_evpn(const char *str, struct prefix_evpn *p); + +/* NOTE: This routine expects the address argument in network byte order. */ +static inline bool ipv4_martian(const struct in_addr *addr) +{ + in_addr_t ip = ntohl(addr->s_addr); + + if (IPV4_NET0(ip) || IPV4_NET127(ip) || !ipv4_unicast_valid(addr)) { + return true; + } + return false; +} + +static inline bool is_default_prefix4(const struct prefix_ipv4 *p) +{ + return p && p->family == AF_INET && p->prefixlen == 0 + && p->prefix.s_addr == INADDR_ANY; +} + +static inline bool is_default_prefix6(const struct prefix_ipv6 *p) +{ + return p && p->family == AF_INET6 && p->prefixlen == 0 + && memcmp(&p->prefix, &in6addr_any, sizeof(struct in6_addr)) + == 0; +} + +static inline bool is_default_prefix(const struct prefix *p) +{ + if (p == NULL) + return false; + + switch (p->family) { + case AF_INET: + return is_default_prefix4((const struct prefix_ipv4 *)p); + case AF_INET6: + return is_default_prefix6((const struct prefix_ipv6 *)p); + } + + return false; +} + +static inline int is_host_route(const struct prefix *p) +{ + if (p->family == AF_INET) + return (p->prefixlen == IPV4_MAX_BITLEN); + else if (p->family == AF_INET6) + return (p->prefixlen == IPV6_MAX_BITLEN); + return 0; +} + +static inline int is_default_host_route(const struct prefix *p) +{ + if (p->family == AF_INET) { + return (p->u.prefix4.s_addr == INADDR_ANY && + p->prefixlen == IPV4_MAX_BITLEN); + } else if (p->family == AF_INET6) { + return ((!memcmp(&p->u.prefix6, &in6addr_any, + sizeof(struct in6_addr))) && + p->prefixlen == IPV6_MAX_BITLEN); + } + return 0; +} + +static inline bool is_ipv6_global_unicast(const struct in6_addr *p) +{ + if (IN6_IS_ADDR_UNSPECIFIED(p) || IN6_IS_ADDR_LOOPBACK(p) || + IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MULTICAST(p)) + return false; + + return true; +} + +/* IPv6 scope values, usable for IPv4 too (cf. below) */ +/* clang-format off */ +enum { + /* 0: reserved */ + MCAST_SCOPE_IFACE = 0x1, + MCAST_SCOPE_LINK = 0x2, + MCAST_SCOPE_REALM = 0x3, + MCAST_SCOPE_ADMIN = 0x4, + MCAST_SCOPE_SITE = 0x5, + /* 6-7: unassigned */ + MCAST_SCOPE_ORG = 0x8, + /* 9-d: unassigned */ + MCAST_SCOPE_GLOBAL = 0xe, + /* f: reserved */ +}; +/* clang-format on */ + +static inline uint8_t ipv6_mcast_scope(const struct in6_addr *addr) +{ + return addr->s6_addr[1] & 0xf; +} + +static inline bool ipv6_mcast_nofwd(const struct in6_addr *addr) +{ + return (addr->s6_addr[1] & 0xf) <= MCAST_SCOPE_LINK; +} + +static inline bool ipv6_mcast_ssm(const struct in6_addr *addr) +{ + uint32_t bits = ntohl(addr->s6_addr32[0]); + + /* ff3x:0000::/32 */ + return (bits & 0xfff0ffff) == 0xff300000; +} + +static inline uint8_t ipv4_mcast_scope(const struct in_addr *addr) +{ + uint32_t bits = ntohl(addr->s_addr); + + /* 224.0.0.0/24 - link scope */ + if ((bits & 0xffffff00) == 0xe0000000) + return MCAST_SCOPE_LINK; + /* 239.0.0.0/8 - org scope */ + if ((bits & 0xff000000) == 0xef000000) + return MCAST_SCOPE_ORG; + + return MCAST_SCOPE_GLOBAL; +} + +static inline bool ipv4_mcast_nofwd(const struct in_addr *addr) +{ + uint32_t bits = ntohl(addr->s_addr); + + /* 224.0.0.0/24 */ + return (bits & 0xffffff00) == 0xe0000000; +} + +static inline bool ipv4_mcast_ssm(const struct in_addr *addr) +{ + uint32_t bits = ntohl(addr->s_addr); + + /* 232.0.0.0/8 */ + return (bits & 0xff000000) == 0xe8000000; +} + +#ifdef _FRR_ATTRIBUTE_PRINTFRR +#pragma FRR printfrr_ext "%pEA" (struct ethaddr *) + +#pragma FRR printfrr_ext "%pI4" (struct in_addr *) +#pragma FRR printfrr_ext "%pI4" (in_addr_t *) + +#pragma FRR printfrr_ext "%pI6" (struct in6_addr *) + +#pragma FRR printfrr_ext "%pFX" (struct prefix *) +#pragma FRR printfrr_ext "%pFX" (struct prefix_ipv4 *) +#pragma FRR printfrr_ext "%pFX" (struct prefix_ipv6 *) +#pragma FRR printfrr_ext "%pFX" (struct prefix_eth *) +#pragma FRR printfrr_ext "%pFX" (struct prefix_evpn *) +#pragma FRR printfrr_ext "%pFX" (struct prefix_fs *) +#pragma FRR printfrr_ext "%pRD" (struct prefix_rd *) + +#pragma FRR printfrr_ext "%pPSG4" (struct prefix_sg *) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _ZEBRA_PREFIX_H */ |