1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 unsigned short ifi_type; 73 int ifi_index; 74 uint32_t ifla_link; 75 uint32_t ifla_mtu; 76 uint32_t ifi_flags; 77 uint32_t ifi_change; 78 }; 79 80 #if defined(NETLINK) || defined(NETLINK_MODULE) 81 /* Provide optimized calls to the functions inside the same linking unit */ 82 83 int _nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs, 84 const struct nlattr_bmask *bm, struct nl_pstate *npt); 85 void _nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp); 86 87 static inline int 88 nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs, 89 const struct nlattr_bmask *bm, struct nl_pstate *npt) 90 { 91 return (_nl_modify_ifp_generic(ifp, lattrs, bm, npt)); 92 } 93 94 static inline void 95 nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp) 96 { 97 _nl_store_ifp_cookie(npt, ifp); 98 } 99 #else 100 /* Provide access to the functions via netlink_glue.c */ 101 int nl_modify_ifp_generic(struct ifnet *ifp, struct nl_parsed_link *lattrs, 102 const struct nlattr_bmask *bm, struct nl_pstate *npt); 103 void nl_store_ifp_cookie(struct nl_pstate *npt, struct ifnet *ifp); 104 #endif /* defined(NETLINK) || defined(NETLINK_MODULE) */ 105 106 107 typedef int rtnl_iface_create_f(struct nl_parsed_link *lattrs, 108 const struct nlattr_bmask *bm, struct nlpcb *nlp, struct nl_pstate *npt); 109 typedef int rtnl_iface_modify_f(struct ifnet *ifp, struct nl_parsed_link *lattrs, 110 const struct nlattr_bmask *bm, struct nlpcb *nlp, struct nl_pstate *npt); 111 typedef int rtnl_iface_dump_f(struct ifnet *ifp, struct nl_writer *nw); 112 113 struct nl_cloner { 114 const char *name; 115 rtnl_iface_create_f *create_f; 116 rtnl_iface_modify_f *modify_f; 117 rtnl_iface_dump_f *dump_f; 118 SLIST_ENTRY(nl_cloner) next; 119 }; 120 121 extern struct nl_cloner generic_cloner; 122 123 void rtnl_ifaces_init(void); 124 void rtnl_ifaces_destroy(void); 125 void rtnl_iface_add_cloner(struct nl_cloner *cloner); 126 void rtnl_iface_del_cloner(struct nl_cloner *cloner); 127 void rtnl_handle_ifnet_event(struct ifnet *ifp, int if_change_mask); 128 129 /* iface_drivers.c */ 130 void rtnl_iface_drivers_register(void); 131 132 /* nexthop.c */ 133 void rtnl_nexthops_init(void); 134 struct nhop_object *nl_find_nhop(uint32_t fibnum, int family, 135 uint32_t uidx, int nh_flags, int *perror); 136 int nl_set_nexthop_gw(struct nhop_object *nh, struct sockaddr *gw, 137 struct ifnet *ifp, struct nl_pstate *npt); 138 139 140 #endif 141