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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Alexander V. Chernikov
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This header file contains public functions and structures used for
* routing table manipulations.
*/
#ifndef _NET_ROUTE_ROUTE_CTL_H_
#define _NET_ROUTE_ROUTE_CTL_H_
struct rib_head *rt_tables_get_rnh_safe(uint32_t table, sa_family_t family);
struct rib_cmd_info {
uint8_t rc_cmd; /* RTM_ADD|RTM_DEL|RTM_CHANGE */
uint8_t spare[3];
uint32_t rc_nh_weight; /* new nhop weight */
struct rtentry *rc_rt; /* Target entry */
struct nhop_object *rc_nh_old; /* Target nhop OR mpath */
struct nhop_object *rc_nh_new; /* Target nhop OR mpath */
};
struct route_nhop_data {
union {
struct nhop_object *rnd_nhop;
struct nhgrp_object *rnd_nhgrp;
};
uint32_t rnd_weight;
};
int rib_add_route_px(uint32_t fibnum, struct sockaddr *dst, int plen,
struct route_nhop_data *rnd, int op_flags, struct rib_cmd_info *rc);
int rib_del_route_px(uint32_t fibnum, struct sockaddr *dst, int plen,
rib_filter_f_t *filter_func, void *filter_arg, int op_flags,
struct rib_cmd_info *rc);
int rib_del_route_px_gw(uint32_t fibnum, struct sockaddr *dst, int plen,
const struct sockaddr *gw, int op_flags, struct rib_cmd_info *rc);
/* operation flags */
#define RTM_F_CREATE 0x01 /* Create object if not exists */
#define RTM_F_EXCL 0x02 /* (Deprecated) Do not replace or append if exists */
#define RTM_F_REPLACE 0x04 /* Replace if route (even multipath) if exists */
#define RTM_F_APPEND 0x08 /* Append path to the route */
#define RTM_F_FORCE 0x10 /* Bump operation priority to highest */
int rib_add_route(uint32_t fibnum, struct rt_addrinfo *info,
struct rib_cmd_info *rc);
int rib_del_route(uint32_t fibnum, struct rt_addrinfo *info,
struct rib_cmd_info *rc);
int rib_change_route(uint32_t fibnum, struct rt_addrinfo *info,
struct rib_cmd_info *rc);
int rib_action(uint32_t fibnum, int action, struct rt_addrinfo *info,
struct rib_cmd_info *rc);
int rib_match_gw(const struct rtentry *rt, const struct nhop_object *nh,
void *_data);
int rib_handle_ifaddr_info(uint32_t fibnum, int cmd, struct rt_addrinfo *info);
int rib_add_default_route(uint32_t fibnum, int family, struct ifnet *ifp,
struct sockaddr *gw, struct rib_cmd_info *rc);
typedef void route_notification_t(const struct rib_cmd_info *rc, void *);
void rib_decompose_notification(const struct rib_cmd_info *rc,
route_notification_t *cb, void *cbdata);
int rib_add_redirect(u_int fibnum, struct sockaddr *dst,
struct sockaddr *gateway, struct sockaddr *author, struct ifnet *ifp,
int flags, int expire_sec);
/* common flags for the functions below */
#define RIB_FLAG_WLOCK 0x01 /* Need exclusive rnh lock */
#define RIB_FLAG_LOCKED 0x02 /* Do not explicitly acquire rnh lock */
enum rib_walk_hook {
RIB_WALK_HOOK_PRE, /* Hook is called before iteration */
RIB_WALK_HOOK_POST, /* Hook is called after iteration */
};
typedef int rib_walktree_f_t(struct rtentry *, void *);
typedef void rib_walk_hook_f_t(struct rib_head *rnh, enum rib_walk_hook stage,
void *arg);
void rib_walk(uint32_t fibnum, int af, bool wlock, rib_walktree_f_t *wa_f,
void *arg);
void rib_walk_ext(uint32_t fibnum, int af, bool wlock, rib_walktree_f_t *wa_f,
rib_walk_hook_f_t *hook_f, void *arg);
void rib_walk_ext_internal(struct rib_head *rnh, bool wlock,
rib_walktree_f_t *wa_f, rib_walk_hook_f_t *hook_f, void *arg);
void rib_walk_ext_locked(struct rib_head *rnh, rib_walktree_f_t *wa_f,
rib_walk_hook_f_t *hook_f, void *arg);
void rib_walk_from(uint32_t fibnum, int family, uint32_t flags, struct sockaddr *prefix,
struct sockaddr *mask, rib_walktree_f_t *wa_f, void *arg);
void rib_walk_del(u_int fibnum, int family, rib_filter_f_t *filter_f,
void *filter_arg, bool report);
void rib_foreach_table_walk(int family, bool wlock, rib_walktree_f_t *wa_f,
rib_walk_hook_f_t *hook_f, void *arg);
void rib_foreach_table_walk_del(int family, rib_filter_f_t *filter_f, void *arg);
struct nhop_object;
struct nhgrp_object;
struct ucred;
const struct rtentry *
rib_lookup_prefix_plen(struct rib_head *rnh, struct sockaddr *dst, int plen,
struct route_nhop_data *rnd);
/* rtentry accessors */
bool rt_is_host(const struct rtentry *rt);
sa_family_t rt_get_family(const struct rtentry *);
struct nhop_object *rt_get_raw_nhop(const struct rtentry *rt);
void rt_get_rnd(const struct rtentry *rt, struct route_nhop_data *rnd);
bool rt_is_exportable(const struct rtentry *rt, struct ucred *cred);
#ifdef INET
struct in_addr;
void rt_get_inet_prefix_plen(const struct rtentry *rt, struct in_addr *paddr,
int *plen, uint32_t *pscopeid);
void rt_get_inet_prefix_pmask(const struct rtentry *rt, struct in_addr *paddr,
struct in_addr *pmask, uint32_t *pscopeid);
struct rtentry *rt_get_inet_parent(uint32_t fibnum, struct in_addr addr, int plen);
#endif
#ifdef INET6
struct in6_addr;
void rt_get_inet6_prefix_plen(const struct rtentry *rt, struct in6_addr *paddr,
int *plen, uint32_t *pscopeid);
void rt_get_inet6_prefix_pmask(const struct rtentry *rt, struct in6_addr *paddr,
struct in6_addr *pmask, uint32_t *pscopeid);
struct rtentry *rt_get_inet6_parent(uint32_t fibnum, const struct in6_addr *paddr,
int plen);
struct in6_addr;
void ip6_writemask(struct in6_addr *addr6, uint8_t mask);
#endif
/* Nexthops */
uint32_t nhops_get_count(struct rib_head *rh);
struct nhop_priv;
struct nhop_iter {
uint32_t fibnum;
uint8_t family;
struct rib_head *rh;
int _i;
struct nhop_priv *_next;
};
struct nhop_object *nhops_iter_start(struct nhop_iter *iter);
struct nhop_object *nhops_iter_next(struct nhop_iter *iter);
void nhops_iter_stop(struct nhop_iter *iter);
/* Multipath */
struct weightened_nhop;
const struct weightened_nhop *nhgrp_get_nhops(const struct nhgrp_object *nhg,
uint32_t *pnum_nhops);
uint32_t nhgrp_get_count(struct rib_head *rh);
int nhgrp_get_group(struct rib_head *rh, struct weightened_nhop *wn, int num_nhops,
uint32_t uidx, struct nhgrp_object **pnhg);
/* Route subscriptions */
enum rib_subscription_type {
RIB_NOTIFY_IMMEDIATE,
RIB_NOTIFY_DELAYED
};
struct rib_subscription;
typedef void rib_subscription_cb_t(struct rib_head *rnh, struct rib_cmd_info *rc,
void *arg);
struct rib_subscription *rib_subscribe(uint32_t fibnum, int family,
rib_subscription_cb_t *f, void *arg, enum rib_subscription_type type,
bool waitok);
struct rib_subscription *rib_subscribe_internal(struct rib_head *rnh,
rib_subscription_cb_t *f, void *arg, enum rib_subscription_type type,
bool waitok);
struct rib_subscription *rib_subscribe_locked(struct rib_head *rnh,
rib_subscription_cb_t *f, void *arg, enum rib_subscription_type type);
void rib_unsubscribe(struct rib_subscription *rs);
void rib_unsubscribe_locked(struct rib_subscription *rs);
void rib_notify(struct rib_head *rnh, enum rib_subscription_type type,
struct rib_cmd_info *rc);
/* Event bridge */
typedef void route_event_f(uint32_t fibnum, const struct rib_cmd_info *rc);
typedef void ifmsg_event_f(struct ifnet *ifp, int if_flags_mask);
struct rtbridge{
route_event_f *route_f;
ifmsg_event_f *ifmsg_f;
};
extern struct rtbridge *rtsock_callback_p;
extern struct rtbridge *netlink_callback_p;
#endif
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