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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2003 Yasuhiro Ohara
*/
#ifndef OSPF6_LSA_H
#define OSPF6_LSA_H
#include "ospf6_top.h"
#include "lib/json.h"
/* Debug option */
#define OSPF6_LSA_DEBUG 0x01
#define OSPF6_LSA_DEBUG_ORIGINATE 0x02
#define OSPF6_LSA_DEBUG_EXAMIN 0x04
#define OSPF6_LSA_DEBUG_FLOOD 0x08
#define OSPF6_LSA_DEBUG_ALL \
(OSPF6_LSA_DEBUG | OSPF6_LSA_DEBUG_ORIGINATE | OSPF6_LSA_DEBUG_EXAMIN \
| OSPF6_LSA_DEBUG_FLOOD)
#define OSPF6_LSA_DEBUG_AGGR 0x10
/* OSPF LSA Default metric values */
#define DEFAULT_DEFAULT_METRIC 20
#define DEFAULT_DEFAULT_ORIGINATE_METRIC 10
#define DEFAULT_DEFAULT_ALWAYS_METRIC 1
#define DEFAULT_METRIC_TYPE 2
#define IS_OSPF6_DEBUG_LSA(name) \
(ospf6_lstype_debug(htons(OSPF6_LSTYPE_##name)) & OSPF6_LSA_DEBUG)
#define IS_OSPF6_DEBUG_ORIGINATE(name) \
(ospf6_lstype_debug(htons(OSPF6_LSTYPE_##name)) \
& OSPF6_LSA_DEBUG_ORIGINATE)
#define IS_OSPF6_DEBUG_EXAMIN(name) \
(ospf6_lstype_debug(htons(OSPF6_LSTYPE_##name)) \
& OSPF6_LSA_DEBUG_EXAMIN)
#define IS_OSPF6_DEBUG_LSA_TYPE(type) \
(ospf6_lstype_debug(type) & OSPF6_LSA_DEBUG)
#define IS_OSPF6_DEBUG_ORIGINATE_TYPE(type) \
(ospf6_lstype_debug(type) & OSPF6_LSA_DEBUG_ORIGINATE)
#define IS_OSPF6_DEBUG_EXAMIN_TYPE(type) \
(ospf6_lstype_debug(type) & OSPF6_LSA_DEBUG_EXAMIN)
#define IS_OSPF6_DEBUG_FLOOD_TYPE(type) \
(ospf6_lstype_debug(type) & OSPF6_LSA_DEBUG_FLOOD)
#define IS_OSPF6_DEBUG_AGGR \
(ospf6_lstype_debug(OSPF6_LSTYPE_AS_EXTERNAL) & OSPF6_LSA_DEBUG_AGGR) \
/* LSA definition */
#define OSPF6_MAX_LSASIZE 4096
/* Type */
#define OSPF6_LSTYPE_UNKNOWN 0x0000
#define OSPF6_LSTYPE_ROUTER 0x2001
#define OSPF6_LSTYPE_NETWORK 0x2002
#define OSPF6_LSTYPE_INTER_PREFIX 0x2003
#define OSPF6_LSTYPE_INTER_ROUTER 0x2004
#define OSPF6_LSTYPE_AS_EXTERNAL 0x4005
#define OSPF6_LSTYPE_GROUP_MEMBERSHIP 0x2006
#define OSPF6_LSTYPE_TYPE_7 0x2007
#define OSPF6_LSTYPE_LINK 0x0008
#define OSPF6_LSTYPE_INTRA_PREFIX 0x2009
#define OSPF6_LSTYPE_GRACE_LSA 0x000b
#define OSPF6_LSTYPE_SIZE 0x000c
/* Masks for LS Type : RFC 2740 A.4.2.1 "LS type" */
#define OSPF6_LSTYPE_UBIT_MASK 0x8000
#define OSPF6_LSTYPE_SCOPE_MASK 0x6000
#define OSPF6_LSTYPE_FCODE_MASK 0x1fff
/* LSA scope */
#define OSPF6_SCOPE_LINKLOCAL 0x0000
#define OSPF6_SCOPE_AREA 0x2000
#define OSPF6_SCOPE_AS 0x4000
#define OSPF6_SCOPE_RESERVED 0x6000
/* XXX U-bit handling should be treated here */
#define OSPF6_LSA_SCOPE(type) (ntohs(type) & OSPF6_LSTYPE_SCOPE_MASK)
/* LSA Header */
#define OSPF6_LSA_HEADER_SIZE 20U
struct ospf6_lsa_header {
uint16_t age; /* LS age */
uint16_t type; /* LS type */
in_addr_t id; /* Link State ID */
in_addr_t adv_router; /* Advertising Router */
uint32_t seqnum; /* LS sequence number */
uint16_t checksum; /* LS checksum */
uint16_t length; /* LSA length */
};
static inline char *ospf6_lsa_header_end(struct ospf6_lsa_header *header)
{
return (char *)header + sizeof(struct ospf6_lsa_header);
}
static inline void *lsa_after_header(struct ospf6_lsa_header *header)
{
return (char *)header + sizeof(struct ospf6_lsa_header);
}
static inline char *ospf6_lsa_end(struct ospf6_lsa_header *header)
{
return (char *)header + ntohs(header->length);
}
static inline uint16_t ospf6_lsa_size(struct ospf6_lsa_header *header)
{
return ntohs(header->length);
}
#define OSPF6_LSA_IS_TYPE(t, L) \
((L)->header->type == htons(OSPF6_LSTYPE_##t) ? 1 : 0)
#define OSPF6_LSA_IS_SAME(L1, L2) \
((L1)->header->adv_router == (L2)->header->adv_router \
&& (L1)->header->id == (L2)->header->id \
&& (L1)->header->type == (L2)->header->type)
#define OSPF6_LSA_IS_MATCH(t, i, a, L) \
((L)->header->adv_router == (a) && (L)->header->id == (i) \
&& (L)->header->type == (t))
#define OSPF6_LSA_IS_DIFFER(L1, L2) ospf6_lsa_is_differ (L1, L2)
#define OSPF6_LSA_IS_MAXAGE(L) (ospf6_lsa_age_current (L) == OSPF_LSA_MAXAGE)
#define OSPF6_LSA_IS_CHANGED(L1, L2) ospf6_lsa_is_changed (L1, L2)
#define OSPF6_LSA_IS_SEQWRAP(L) ((L)->header->seqnum == htonl(OSPF_MAX_SEQUENCE_NUMBER + 1))
/* Router-LSA */
#define OSPF6_ROUTER_LSA_MIN_SIZE 4U
struct ospf6_router_lsa {
uint8_t bits;
uint8_t options[3];
/* followed by ospf6_router_lsdesc(s) */
};
/* Link State Description in Router-LSA */
#define OSPF6_ROUTER_LSDESC_FIX_SIZE 16U
struct ospf6_router_lsdesc {
uint8_t type;
uint8_t reserved;
uint16_t metric; /* output cost */
uint32_t interface_id;
uint32_t neighbor_interface_id;
in_addr_t neighbor_router_id;
};
#define OSPF6_ROUTER_LSDESC_POINTTOPOINT 1
#define OSPF6_ROUTER_LSDESC_TRANSIT_NETWORK 2
#define OSPF6_ROUTER_LSDESC_STUB_NETWORK 3
#define OSPF6_ROUTER_LSDESC_VIRTUAL_LINK 4
/* Network-LSA */
#define OSPF6_NETWORK_LSA_MIN_SIZE 4U
struct ospf6_network_lsa {
uint8_t reserved;
uint8_t options[3];
/* followed by ospf6_network_lsdesc(s) */
};
/* Link State Description in Network-LSA */
#define OSPF6_NETWORK_LSDESC_FIX_SIZE 4U
struct ospf6_network_lsdesc {
in_addr_t router_id;
};
#define NETWORK_LSDESC_GET_NBR_ROUTERID(x) \
(((struct ospf6_network_lsdesc *)(x))->router_id)
/* Inter-Area-Prefix-LSA */
#define OSPF6_INTER_PREFIX_LSA_MIN_SIZE 4U /* w/o IPv6 prefix */
struct ospf6_inter_prefix_lsa {
uint32_t metric;
struct ospf6_prefix prefix;
};
/* Inter-Area-Router-LSA */
#define OSPF6_INTER_ROUTER_LSA_FIX_SIZE 12U
struct ospf6_inter_router_lsa {
uint8_t mbz;
uint8_t options[3];
uint32_t metric;
uint32_t router_id;
};
/* AS-External-LSA */
#define OSPF6_AS_EXTERNAL_LSA_MIN_SIZE 4U /* w/o IPv6 prefix */
struct ospf6_as_external_lsa {
uint32_t bits_metric;
struct ospf6_prefix prefix;
/* followed by none or one forwarding address */
/* followed by none or one external route tag */
/* followed by none or one referenced LS-ID */
};
/* FIXME: move nssa lsa here. */
/* Link-LSA */
#define OSPF6_LINK_LSA_MIN_SIZE 24U /* w/o 1st IPv6 prefix */
struct ospf6_link_lsa {
uint8_t priority;
uint8_t options[3];
struct in6_addr linklocal_addr;
uint32_t prefix_num;
/* followed by ospf6 prefix(es) */
};
/* Intra-Area-Prefix-LSA */
#define OSPF6_INTRA_PREFIX_LSA_MIN_SIZE 12U /* w/o 1st IPv6 prefix */
struct ospf6_intra_prefix_lsa {
uint16_t prefix_num;
uint16_t ref_type;
uint32_t ref_id;
in_addr_t ref_adv_router;
/* followed by ospf6 prefix(es) */
};
struct ospf6_lsa {
char name[64]; /* dump string */
struct route_node *rn;
unsigned char lock; /* reference counter */
unsigned char flag; /* special meaning (e.g. floodback) */
struct timeval birth; /* tv_sec when LS age 0 */
struct timeval originated; /* used by MinLSInterval check */
struct timeval received; /* used by MinLSArrival check */
struct timeval installed;
struct event *expire;
struct event *refresh; /* For self-originated LSA */
int retrans_count;
struct ospf6_lsdb *lsdb;
in_addr_t external_lsa_id;
/* lsa instance */
struct ospf6_lsa_header *header;
/*For topo chg detection in HELPER role*/
bool tobe_acknowledged;
};
#define OSPF6_LSA_HEADERONLY 0x01
#define OSPF6_LSA_FLOODBACK 0x02
#define OSPF6_LSA_DUPLICATE 0x04
#define OSPF6_LSA_IMPLIEDACK 0x08
#define OSPF6_LSA_UNAPPROVED 0x10
#define OSPF6_LSA_SEQWRAPPED 0x20
#define OSPF6_LSA_FLUSH 0x40
struct ospf6_lsa_handler {
uint16_t lh_type; /* host byte order */
const char *lh_name;
const char *lh_short_name;
int (*lh_show)(struct vty *, struct ospf6_lsa *, json_object *json_obj,
bool use_json);
char *(*lh_get_prefix_str)(struct ospf6_lsa *, char *buf, int buflen,
int pos);
uint8_t lh_debug;
};
#define OSPF6_LSA_IS_KNOWN(t) \
(ospf6_get_lsa_handler(t)->lh_type != OSPF6_LSTYPE_UNKNOWN ? 1 : 0)
/* Macro for LSA Origination */
/* addr is (struct prefix *) */
#define CONTINUE_IF_ADDRESS_LINKLOCAL(debug, addr) \
if (IN6_IS_ADDR_LINKLOCAL(&(addr)->u.prefix6)) { \
if (debug) \
zlog_debug("Filter out Linklocal: %pFX", addr); \
continue; \
}
#define CONTINUE_IF_ADDRESS_UNSPECIFIED(debug, addr) \
if (IN6_IS_ADDR_UNSPECIFIED(&(addr)->u.prefix6)) { \
if (debug) \
zlog_debug("Filter out Unspecified: %pFX", addr); \
continue; \
}
#define CONTINUE_IF_ADDRESS_LOOPBACK(debug, addr) \
if (IN6_IS_ADDR_LOOPBACK(&(addr)->u.prefix6)) { \
if (debug) \
zlog_debug("Filter out Loopback: %pFX", addr); \
continue; \
}
#define CONTINUE_IF_ADDRESS_V4COMPAT(debug, addr) \
if (IN6_IS_ADDR_V4COMPAT(&(addr)->u.prefix6)) { \
if (debug) \
zlog_debug("Filter out V4Compat: %pFX", addr); \
continue; \
}
#define CONTINUE_IF_ADDRESS_V4MAPPED(debug, addr) \
if (IN6_IS_ADDR_V4MAPPED(&(addr)->u.prefix6)) { \
if (debug) \
zlog_debug("Filter out V4Mapped: %pFX", addr); \
continue; \
}
#define CHECK_LSA_TOPO_CHG_ELIGIBLE(type) \
((type == OSPF6_LSTYPE_ROUTER) \
|| (type == OSPF6_LSTYPE_NETWORK) \
|| (type == OSPF6_LSTYPE_INTER_PREFIX) \
|| (type == OSPF6_LSTYPE_INTER_ROUTER) \
|| (type == OSPF6_LSTYPE_AS_EXTERNAL) \
|| (type == OSPF6_LSTYPE_TYPE_7) \
|| (type == OSPF6_LSTYPE_INTRA_PREFIX))
/* Function Prototypes */
extern const char *ospf6_lstype_name(uint16_t type);
extern const char *ospf6_lstype_short_name(uint16_t type);
extern uint8_t ospf6_lstype_debug(uint16_t type);
extern int metric_type(struct ospf6 *ospf6, int type, uint8_t instance);
extern int metric_value(struct ospf6 *ospf6, int type, uint8_t instance);
extern int ospf6_lsa_is_differ(struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2);
extern int ospf6_lsa_is_changed(struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2);
extern uint16_t ospf6_lsa_age_current(struct ospf6_lsa *lsa);
extern void ospf6_lsa_age_update_to_send(struct ospf6_lsa *lsa,
uint32_t transdelay);
extern void ospf6_lsa_premature_aging(struct ospf6_lsa *lsa);
extern int ospf6_lsa_compare(struct ospf6_lsa *lsa1, struct ospf6_lsa *lsa2);
extern char *ospf6_lsa_printbuf(struct ospf6_lsa *lsa, char *buf, int size);
extern void ospf6_lsa_header_print_raw(struct ospf6_lsa_header *header);
extern void ospf6_lsa_header_print(struct ospf6_lsa *lsa);
extern void ospf6_lsa_show_summary_header(struct vty *vty);
extern void ospf6_lsa_show_summary(struct vty *vty, struct ospf6_lsa *lsa,
json_object *json, bool use_json);
extern void ospf6_lsa_show_dump(struct vty *vty, struct ospf6_lsa *lsa,
json_object *json, bool use_json);
extern void ospf6_lsa_show_internal(struct vty *vty, struct ospf6_lsa *lsa,
json_object *json, bool use_json);
extern void ospf6_lsa_show(struct vty *vty, struct ospf6_lsa *lsa,
json_object *json, bool use_json);
extern struct ospf6_lsa *ospf6_lsa_alloc(size_t lsa_length);
extern struct ospf6_lsa *ospf6_lsa_create(struct ospf6_lsa_header *header);
extern struct ospf6_lsa *
ospf6_lsa_create_headeronly(struct ospf6_lsa_header *header);
extern void ospf6_lsa_delete(struct ospf6_lsa *lsa);
extern struct ospf6_lsa *ospf6_lsa_copy(struct ospf6_lsa *lsa);
extern struct ospf6_lsa *ospf6_lsa_lock(struct ospf6_lsa *lsa);
extern void ospf6_lsa_unlock(struct ospf6_lsa **lsa);
extern void ospf6_lsa_expire(struct event *thread);
extern void ospf6_lsa_refresh(struct event *thread);
extern unsigned short ospf6_lsa_checksum(struct ospf6_lsa_header *lsah);
extern int ospf6_lsa_checksum_valid(struct ospf6_lsa_header *lsah);
extern int ospf6_lsa_prohibited_duration(uint16_t type, uint32_t id,
uint32_t adv_router, void *scope);
extern void ospf6_install_lsa_handler(struct ospf6_lsa_handler *handler);
extern struct ospf6_lsa_handler *ospf6_get_lsa_handler(uint16_t type);
extern void ospf6_lsa_debug_set_all(bool val);
extern void ospf6_lsa_init(void);
extern void ospf6_lsa_terminate(void);
extern int config_write_ospf6_debug_lsa(struct vty *vty);
extern void install_element_ospf6_debug_lsa(void);
extern void ospf6_lsa_age_set(struct ospf6_lsa *lsa);
extern void ospf6_flush_self_originated_lsas_now(struct ospf6 *ospf6);
extern struct ospf6 *ospf6_get_by_lsdb(struct ospf6_lsa *lsa);
struct ospf6_lsa *ospf6_find_external_lsa(struct ospf6 *ospf6,
struct prefix *p);
void *lsdesc_start_lsa_type(struct ospf6_lsa_header *header, int lsa_type);
void *lsdesc_start(struct ospf6_lsa_header *header);
void *nth_lsdesc(struct ospf6_lsa_header *header, int pos);
void *nth_prefix(struct ospf6_lsa_header *header, int pos);
#endif /* OSPF6_LSA_H */
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