1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 /*
29 * This file contains definitions shared among NETLINK_ROUTE family
30 */
31 #ifndef _NETLINK_ROUTE_ROUTE_VAR_H_
32 #define _NETLINK_ROUTE_ROUTE_VAR_H_
33
34 #include <sys/priv.h> /* values for priv_check */
35
36 struct nlmsghdr;
37 struct nlpcb;
38 struct nl_pstate;
39
40 typedef int rtnl_msg_cb_f(struct nlmsghdr *hdr, struct nlpcb *nlp,
41 struct nl_pstate *npt);
42
43 struct rtnl_cmd_handler {
44 int cmd;
45 const char *name;
46 rtnl_msg_cb_f *cb;
47 int priv;
48 int flags;
49 };
50
51 #define RTNL_F_NOEPOCH 0x01 /* Do not enter epoch when handling command */
52 #define RTNL_F_ALLOW_NONVNET_JAIL 0x02 /* Allow command execution inside non-VNET jail */
53
54 bool rtnl_register_messages(const struct rtnl_cmd_handler *handlers, int count);
55
56 /* route.c */
57 struct rib_cmd_info;
58 void rtnl_handle_route_event(uint32_t fibnum, const struct rib_cmd_info *rc);
59 void rtnl_routes_init(void);
60
61 /* neigh.c */
62 void rtnl_neighs_init(void);
63 void rtnl_neighs_destroy(void);
64
65 /* iface.c */
66 struct nl_parsed_link {
67 char *ifla_group;
68 char *ifla_ifname;
69 char *ifla_cloner;
70 char *ifla_ifalias;
71 struct nlattr *ifla_idata;
72 struct nlattr *ifla_address;
73 unsigned short ifi_type;
74 int ifi_index;
75 uint32_t ifla_link;
76 uint32_t ifla_mtu;
77 uint32_t ifi_flags;
78 uint32_t ifi_change;
79 };
80
81 #if defined(NETLINK) || defined(NETLINK_MODULE)
82 /* Provide optimized calls to the functions inside the same linking unit */
83
84 int _nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs,
85 const struct nlattr_bmask *bm, struct nl_pstate *npt);
86 void _nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp);
87
88 static inline int
nl_modify_ifp_generic(struct ifnet * ifp,struct nl_parsed_link * lattrs,const struct nlattr_bmask * bm,struct nl_pstate * npt)89 nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs,
90 const struct nlattr_bmask *bm, struct nl_pstate *npt)
91 {
92 return (_nl_modify_ifp_generic(ifp, lattrs, bm, npt));
93 }
94
95 static inline void
nl_store_ifp_cookie(struct nl_pstate * npt,struct ifnet * ifp)96 nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp)
97 {
98 _nl_store_ifp_cookie(npt, ifp);
99 }
100 #else
101 /* Provide access to the functions via netlink_glue.c */
102 int nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs,
103 const struct nlattr_bmask *bm, struct nl_pstate *npt);
104 void nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp);
105 #endif /* defined(NETLINK) || defined(NETLINK_MODULE) */
106
107
108 typedef int rtnl_iface_create_f(struct nl_parsed_link *lattrs,
109 const struct nlattr_bmask *bm, struct nlpcb *nlp, struct nl_pstate *npt);
110 typedef int rtnl_iface_modify_f(struct ifnet *ifp, struct nl_parsed_link *lattrs,
111 const struct nlattr_bmask *bm, struct nlpcb *nlp, struct nl_pstate *npt);
112 typedef int rtnl_iface_dump_f(struct ifnet *ifp, struct nl_writer *nw);
113
114 struct nl_cloner {
115 const char *name;
116 rtnl_iface_create_f *create_f;
117 rtnl_iface_modify_f *modify_f;
118 rtnl_iface_dump_f *dump_f;
119 SLIST_ENTRY(nl_cloner) next;
120 };
121
122 extern struct nl_cloner generic_cloner;
123
124 void rtnl_ifaces_init(void);
125 void rtnl_ifaces_destroy(void);
126 void rtnl_iface_add_cloner(struct nl_cloner *cloner);
127 void rtnl_iface_del_cloner(struct nl_cloner *cloner);
128 void rtnl_handle_ifnet_event(struct ifnet *ifp, int if_change_mask);
129
130 /* iface_drivers.c */
131 void rtnl_iface_drivers_register(void);
132
133 /* nexthop.c */
134 void rtnl_nexthops_init(void);
135 struct nhop_object *nl_find_nhop(uint32_t fibnum, int family,
136 uint32_t uidx, int nh_flags, int *perror);
137 int nl_set_nexthop_gw(struct nhop_object *nh, struct sockaddr *gw,
138 struct ifnet *ifp, struct nl_pstate *npt);
139
140
141 #endif
142