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