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mirror_frr/ospf6d/ospf6_route.h
Igor Ryzhov 7d67b9ff28 build: add -Wimplicit-fallthrough 
Also:
- replace all /* fallthrough */ comments with portable fallthrough;
pseudo keyword to accomodate both gcc and clang
- add missing break; statements as required by older versions of gcc
- cleanup some code to remove unnecessary fallthrough

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
2023-10-12 21:23:18 +03:00

393 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2003 Yasuhiro Ohara
*/
#ifndef OSPF6_ROUTE_H
#define OSPF6_ROUTE_H
#include "command.h"
#include "zclient.h"
#include "lib/json.h"
#include "lib/nexthop.h"
#define OSPF6_MULTI_PATH_LIMIT 4
/* Debug option */
extern unsigned char conf_debug_ospf6_route;
#define OSPF6_DEBUG_ROUTE_TABLE 0x01
#define OSPF6_DEBUG_ROUTE_INTRA 0x02
#define OSPF6_DEBUG_ROUTE_INTER 0x04
#define OSPF6_DEBUG_ROUTE_MEMORY 0x08
#define OSPF6_DEBUG_ROUTE_ALL \
(OSPF6_DEBUG_ROUTE_TABLE | OSPF6_DEBUG_ROUTE_INTRA \
| OSPF6_DEBUG_ROUTE_INTER | OSPF6_DEBUG_ROUTE_MEMORY)
#define OSPF6_DEBUG_ROUTE_ON(level) (conf_debug_ospf6_route |= (level))
#define OSPF6_DEBUG_ROUTE_OFF(level) (conf_debug_ospf6_route &= ~(level))
#define IS_OSPF6_DEBUG_ROUTE(e) (conf_debug_ospf6_route & OSPF6_DEBUG_ROUTE_##e)
/* Nexthop */
struct ospf6_nexthop {
/* Interface index */
ifindex_t ifindex;
/* IP address, if any */
struct in6_addr address;
/** Next-hop type information. */
enum nexthop_types_t type;
};
static inline bool ospf6_nexthop_is_set(const struct ospf6_nexthop *nh)
{
return nh->type != 0;
}
static inline bool ospf6_nexthop_is_same(const struct ospf6_nexthop *nha,
const struct ospf6_nexthop *nhb)
{
if (nha->type != nhb->type)
return false;
switch (nha->type) {
case NEXTHOP_TYPE_BLACKHOLE:
/* NOTHING */
break;
case NEXTHOP_TYPE_IFINDEX:
if (nha->ifindex != nhb->ifindex)
return false;
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
case NEXTHOP_TYPE_IPV4:
/* OSPFv3 does not support IPv4 next hops. */
return false;
case NEXTHOP_TYPE_IPV6_IFINDEX:
if (nha->ifindex != nhb->ifindex)
return false;
fallthrough;
case NEXTHOP_TYPE_IPV6:
if (!IN6_ARE_ADDR_EQUAL(&nha->address, &nhb->address))
return false;
break;
}
return true;
}
static inline void ospf6_nexthop_clear(struct ospf6_nexthop *nh)
{
memset(nh, 0, sizeof(*nh));
}
static inline void ospf6_nexthop_copy(struct ospf6_nexthop *nha,
const struct ospf6_nexthop *nhb)
{
memcpy(nha, nhb, sizeof(*nha));
}
/* Path */
struct ospf6_ls_origin {
uint16_t type;
in_addr_t id;
in_addr_t adv_router;
};
struct ospf6_path {
/* Link State Origin */
struct ospf6_ls_origin origin;
/* Router bits */
uint8_t router_bits;
/* Optional Capabilities */
uint8_t options[3];
/* Associated Area */
in_addr_t area_id;
/* Path-type */
uint8_t type;
uint8_t subtype; /* only used for redistribute i.e ZEBRA_ROUTE_XXX */
/* Cost */
uint8_t metric_type;
uint32_t cost;
struct prefix ls_prefix;
union {
uint32_t cost_e2;
uint32_t cost_config;
} u;
uint32_t tag;
/* nh list for this path */
struct list *nh_list;
};
#define OSPF6_PATH_TYPE_NONE 0
#define OSPF6_PATH_TYPE_INTRA 1
#define OSPF6_PATH_TYPE_INTER 2
#define OSPF6_PATH_TYPE_EXTERNAL1 3
#define OSPF6_PATH_TYPE_EXTERNAL2 4
#define OSPF6_PATH_TYPE_MAX 5
#define OSPF6_PATH_SUBTYPE_DEFAULT_RT 1
#define OSPF6_PATH_COST_IS_CONFIGURED(path) (path.u.cost_config != OSPF_AREA_RANGE_COST_UNSPEC)
#include "prefix.h"
#include "table.h"
#include "bitfield.h"
struct ospf6_route {
struct route_node *rnode;
struct ospf6_route_table *table;
struct ospf6_route *prev;
struct ospf6_route *next;
/* Back pointer to ospf6 */
struct ospf6 *ospf6;
unsigned int lock;
/* Destination Type */
uint8_t type;
/* XXX: It would likely be better to use separate struct in_addr's
* for the advertising router-ID and prefix IDs, instead of stuffing
* them
* into one. See also XXX below.
*/
/* Destination ID */
struct prefix prefix;
/* Time */
struct timeval installed;
struct timeval changed;
/* flag */
uint16_t flag;
/* Prefix Options */
uint8_t prefix_options;
/* route option */
void *route_option;
/* link state id for advertising */
uint32_t linkstate_id;
/* path */
struct ospf6_path path;
/* List of Paths. */
struct list *paths;
/* nexthop */
struct list *nh_list;
/* points to the summarised route */
struct ospf6_external_aggr_rt *aggr_route;
/* For Aggr routes */
bool to_be_processed;
};
#define OSPF6_DEST_TYPE_NONE 0
#define OSPF6_DEST_TYPE_ROUTER 1
#define OSPF6_DEST_TYPE_NETWORK 2
#define OSPF6_DEST_TYPE_DISCARD 3
#define OSPF6_DEST_TYPE_LINKSTATE 4
#define OSPF6_DEST_TYPE_RANGE 5
#define OSPF6_DEST_TYPE_MAX 6
#define OSPF6_ROUTE_CHANGE 0x0001
#define OSPF6_ROUTE_ADD 0x0002
#define OSPF6_ROUTE_REMOVE 0x0004
#define OSPF6_ROUTE_BEST 0x0008
#define OSPF6_ROUTE_ACTIVE_SUMMARY 0x0010
#define OSPF6_ROUTE_DO_NOT_ADVERTISE 0x0020
#define OSPF6_ROUTE_WAS_REMOVED 0x0040
#define OSPF6_ROUTE_BLACKHOLE_ADDED 0x0080
#define OSPF6_ROUTE_NSSA_RANGE 0x0100
struct ospf6;
struct ospf6_route_table {
int scope_type;
int table_type;
void *scope;
/* patricia tree */
struct route_table *table;
uint32_t count;
/* hooks */
void (*hook_add)(struct ospf6_route *);
void (*hook_change)(struct ospf6_route *);
void (*hook_remove)(struct ospf6_route *);
};
#define OSPF6_SCOPE_TYPE_NONE 0
#define OSPF6_SCOPE_TYPE_GLOBAL 1
#define OSPF6_SCOPE_TYPE_AREA 2
#define OSPF6_SCOPE_TYPE_INTERFACE 3
#define OSPF6_TABLE_TYPE_NONE 0
#define OSPF6_TABLE_TYPE_ROUTES 1
#define OSPF6_TABLE_TYPE_BORDER_ROUTERS 2
#define OSPF6_TABLE_TYPE_CONNECTED_ROUTES 3
#define OSPF6_TABLE_TYPE_EXTERNAL_ROUTES 4
#define OSPF6_TABLE_TYPE_SPF_RESULTS 5
#define OSPF6_TABLE_TYPE_PREFIX_RANGES 6
#define OSPF6_TABLE_TYPE_SUMMARY_PREFIXES 7
#define OSPF6_TABLE_TYPE_SUMMARY_ROUTERS 8
#define OSPF6_ROUTE_TABLE_CREATE(s, t) \
ospf6_route_table_create(OSPF6_SCOPE_TYPE_##s, OSPF6_TABLE_TYPE_##t)
extern const char *const ospf6_dest_type_str[OSPF6_DEST_TYPE_MAX];
extern const char *const ospf6_dest_type_substr[OSPF6_DEST_TYPE_MAX];
#define OSPF6_DEST_TYPE_NAME(x) \
(0 < (x) && (x) < OSPF6_DEST_TYPE_MAX ? ospf6_dest_type_str[(x)] \
: ospf6_dest_type_str[0])
#define OSPF6_DEST_TYPE_SUBSTR(x) \
(0 < (x) && (x) < OSPF6_DEST_TYPE_MAX ? ospf6_dest_type_substr[(x)] \
: ospf6_dest_type_substr[0])
extern const char *const ospf6_path_type_str[OSPF6_PATH_TYPE_MAX];
extern const char *const ospf6_path_type_substr[OSPF6_PATH_TYPE_MAX];
#define OSPF6_PATH_TYPE_NAME(x) \
(0 < (x) && (x) < OSPF6_PATH_TYPE_MAX ? ospf6_path_type_str[(x)] \
: ospf6_path_type_str[0])
#define OSPF6_PATH_TYPE_SUBSTR(x) \
(0 < (x) && (x) < OSPF6_PATH_TYPE_MAX ? ospf6_path_type_substr[(x)] \
: ospf6_path_type_substr[0])
#define OSPF6_PATH_TYPE_JSON(x) \
(0 < (x) && (x) < OSPF6_PATH_TYPE_MAX ? ospf6_path_type_json[(x)] \
: ospf6_path_type_json[0])
#define OSPF6_ROUTE_ADDRESS_STR "Display the route bestmatches the address\n"
#define OSPF6_ROUTE_PREFIX_STR "Display the route\n"
#define OSPF6_ROUTE_MATCH_STR "Display the route matches the prefix\n"
#define ospf6_route_is_prefix(p, r) (prefix_same(p, &(r)->prefix))
#define ospf6_route_is_same(ra, rb) (prefix_same(&(ra)->prefix, &(rb)->prefix))
#define ospf6_route_is_same_origin(ra, rb) \
((ra)->path.area_id == (rb)->path.area_id \
&& (ra)->path.origin.type == (rb)->path.origin.type \
&& (ra)->path.origin.id == (rb)->path.origin.id \
&& (ra)->path.origin.adv_router == (rb)->path.origin.adv_router)
#define ospf6_route_is_identical(ra, rb) \
((ra)->type == (rb)->type && \
prefix_same(&(ra)->prefix, &(rb)->prefix) && \
(ra)->path.type == (rb)->path.type && \
(ra)->path.cost == (rb)->path.cost && \
(ra)->path.u.cost_e2 == (rb)->path.u.cost_e2 && \
listcount(ra->paths) == listcount(rb->paths) && \
ospf6_route_cmp_nexthops(ra, rb))
#define ospf6_route_is_best(r) (CHECK_FLAG ((r)->flag, OSPF6_ROUTE_BEST))
#define ospf6_linkstate_prefix_adv_router(x) ((x)->u.lp.id.s_addr)
#define ospf6_linkstate_prefix_id(x) ((x)->u.lp.adv_router.s_addr)
#define ADV_ROUTER_IN_PREFIX(x) ((x)->u.lp.id.s_addr)
/* Function prototype */
extern void ospf6_linkstate_prefix(uint32_t adv_router, uint32_t id,
struct prefix *prefix);
extern void ospf6_linkstate_prefix2str(struct prefix *prefix, char *buf,
int size);
extern struct ospf6_nexthop *ospf6_nexthop_create(void);
extern int ospf6_nexthop_cmp(struct ospf6_nexthop *a, struct ospf6_nexthop *b);
extern void ospf6_nexthop_delete(struct ospf6_nexthop *nh);
extern void ospf6_clear_nexthops(struct list *nh_list);
extern int ospf6_num_nexthops(struct list *nh_list);
extern void ospf6_copy_nexthops(struct list *dst, struct list *src);
extern void ospf6_merge_nexthops(struct list *dst, struct list *src);
extern void ospf6_add_nexthop(struct list *nh_list, int ifindex,
const struct in6_addr *addr);
extern void ospf6_add_route_nexthop_blackhole(struct ospf6_route *route);
extern int ospf6_num_nexthops(struct list *nh_list);
extern bool ospf6_route_cmp_nexthops(struct ospf6_route *a,
struct ospf6_route *b);
extern void ospf6_route_zebra_copy_nexthops(struct ospf6_route *route,
struct zapi_nexthop nexthops[],
int entries, vrf_id_t vrf_id);
extern int ospf6_route_get_first_nh_index(struct ospf6_route *route);
/* Hide abstraction of nexthop implementation in route from outsiders */
#define ospf6_route_copy_nexthops(dst, src) ospf6_copy_nexthops(dst->nh_list, src->nh_list)
#define ospf6_route_merge_nexthops(dst, src) ospf6_merge_nexthops(dst->nh_list, src->nh_list)
#define ospf6_route_num_nexthops(route) ospf6_num_nexthops(route->nh_list)
#define ospf6_route_add_nexthop(route, ifindex, addr) \
ospf6_add_nexthop(route->nh_list, ifindex, addr)
extern struct ospf6_route *ospf6_route_create(struct ospf6 *ospf6);
extern void ospf6_route_delete(struct ospf6_route *route);
extern struct ospf6_route *ospf6_route_copy(struct ospf6_route *route);
extern int ospf6_route_cmp(struct ospf6_route *ra, struct ospf6_route *rb);
extern void ospf6_route_lock(struct ospf6_route *route);
extern void ospf6_route_unlock(struct ospf6_route *route);
extern struct ospf6_route *ospf6_route_lookup(struct prefix *prefix,
struct ospf6_route_table *table);
extern struct ospf6_route *
ospf6_route_lookup_identical(struct ospf6_route *route,
struct ospf6_route_table *table);
extern struct ospf6_route *
ospf6_route_lookup_bestmatch(struct prefix *prefix,
struct ospf6_route_table *table);
extern struct ospf6_route *ospf6_route_add(struct ospf6_route *route,
struct ospf6_route_table *table);
extern void ospf6_route_remove(struct ospf6_route *route,
struct ospf6_route_table *table);
extern struct ospf6_route *ospf6_route_head(struct ospf6_route_table *table);
extern struct ospf6_route *ospf6_route_next(struct ospf6_route *route);
extern struct ospf6_route *ospf6_route_best_next(struct ospf6_route *route);
extern struct ospf6_route *
ospf6_route_match_head(struct prefix *prefix, struct ospf6_route_table *table);
extern struct ospf6_route *ospf6_route_match_next(struct prefix *prefix,
struct ospf6_route *route);
extern void ospf6_route_remove_all(struct ospf6_route_table *table);
extern struct ospf6_route_table *ospf6_route_table_create(int s, int t);
extern void ospf6_route_table_delete(struct ospf6_route_table *table);
extern void ospf6_route_dump(struct ospf6_route_table *table);
extern void ospf6_route_show(struct vty *vty, struct ospf6_route *route,
json_object *json, bool use_json);
extern void ospf6_route_show_detail(struct vty *vty, struct ospf6_route *route,
json_object *json, bool use_json);
extern int ospf6_route_table_show(struct vty *vty, int argc_start, int argc,
struct cmd_token **argv,
struct ospf6_route_table *table,
bool use_json);
extern int ospf6_linkstate_table_show(struct vty *vty, int idx_ipv4, int argc,
struct cmd_token **argv,
struct ospf6_route_table *table);
extern void ospf6_brouter_show_header(struct vty *vty);
extern void ospf6_brouter_show(struct vty *vty, struct ospf6_route *route);
extern int config_write_ospf6_debug_route(struct vty *vty);
extern void install_element_ospf6_debug_route(void);
extern void ospf6_route_init(void);
extern void ospf6_path_free(struct ospf6_path *op);
extern struct ospf6_path *ospf6_path_dup(struct ospf6_path *path);
extern void ospf6_copy_paths(struct list *dst, struct list *src);
#endif /* OSPF6_ROUTE_H */
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