123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130 |
- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
- *
- * 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.
- */
- #ifndef _NETLINK_NETLINK_CTL_H_
- #define _NETLINK_NETLINK_CTL_H_
- #ifdef _KERNEL
- /*
- * This file provides headers for the public KPI of the netlink
- * subsystem
- */
- #include <sys/_eventhandler.h>
- MALLOC_DECLARE(M_NETLINK);
- /*
- * Macro for handling attribute TLVs
- */
- #define _roundup2(x, y) (((x)+((y)-1))&(~((y)-1)))
- #define NETLINK_ALIGN_SIZE sizeof(uint32_t)
- #define NETLINK_ALIGN(_len) _roundup2(_len, NETLINK_ALIGN_SIZE)
- #define NLA_ALIGN_SIZE sizeof(uint32_t)
- #define NLA_ALIGN(_len) _roundup2(_len, NLA_ALIGN_SIZE)
- #define NLA_HDRLEN ((int)sizeof(struct nlattr))
- #define NLA_DATA_LEN(_nla) ((int)((_nla)->nla_len - NLA_HDRLEN))
- #define NLA_DATA(_nla) NL_ITEM_DATA(_nla, NLA_HDRLEN)
- #define NLA_DATA_CONST(_nla) NL_ITEM_DATA_CONST(_nla, NLA_HDRLEN)
- #define NLA_TYPE(_nla) ((_nla)->nla_type & 0x3FFF)
- #ifndef typeof
- #define typeof __typeof
- #endif
- #define NLA_NEXT(_attr) (struct nlattr *)((char *)_attr + NLA_ALIGN(_attr->nla_len))
- #define _NLA_END(_start, _len) ((char *)(_start) + (_len))
- #define NLA_FOREACH(_attr, _start, _len) \
- for (typeof(_attr) _end = (typeof(_attr))_NLA_END(_start, _len), _attr = (_start); \
- ((char *)_attr < (char *)_end) && \
- ((char *)NLA_NEXT(_attr) <= (char *)_end); \
- _attr = (_len -= NLA_ALIGN(_attr->nla_len), NLA_NEXT(_attr)))
- #define NL_ARRAY_LEN(_a) (sizeof(_a) / sizeof((_a)[0]))
- #include <netlink/netlink_message_writer.h>
- #include <netlink/netlink_message_parser.h>
- /* Protocol handlers */
- struct nl_pstate;
- typedef int (*nl_handler_f)(struct nlmsghdr *hdr, struct nl_pstate *npt);
- bool netlink_register_proto(int proto, const char *proto_name, nl_handler_f handler);
- bool netlink_unregister_proto(int proto);
- /* Common helpers */
- bool nl_has_listeners(int netlink_family, uint32_t groups_mask);
- bool nlp_has_priv(struct nlpcb *nlp, int priv);
- struct ucred *nlp_get_cred(struct nlpcb *nlp);
- uint32_t nlp_get_pid(const struct nlpcb *nlp);
- bool nlp_unconstrained_vnet(const struct nlpcb *nlp);
- /* netlink_generic.c */
- struct genl_cmd {
- const char *cmd_name;
- nl_handler_f cmd_cb;
- uint32_t cmd_flags;
- uint32_t cmd_priv;
- uint32_t cmd_num;
- };
- uint32_t genl_register_family(const char *family_name, size_t hdrsize,
- int family_version, int max_attr_idx);
- bool genl_unregister_family(const char *family_name);
- bool genl_register_cmds(const char *family_name, const struct genl_cmd *cmds,
- int count);
- uint32_t genl_register_group(const char *family_name, const char *group_name);
- struct genl_family;
- const char *genl_get_family_name(const struct genl_family *gf);
- uint32_t genl_get_family_id(const struct genl_family *gf);
- typedef void (*genl_family_event_handler_t)(void *arg, const struct genl_family *gf, int action);
- EVENTHANDLER_DECLARE(genl_family_event, genl_family_event_handler_t);
- struct thread;
- #if defined(NETLINK) || defined(NETLINK_MODULE)
- /* Provide optimized calls to the functions inside the same linking unit */
- struct nlpcb *_nl_get_thread_nlp(struct thread *td);
- static inline struct nlpcb *
- nl_get_thread_nlp(struct thread *td)
- {
- return (_nl_get_thread_nlp(td));
- }
- #else
- /* Provide access to the functions via netlink_glue.c */
- struct nlpcb *nl_get_thread_nlp(struct thread *td);
- #endif /* defined(NETLINK) || defined(NETLINK_MODULE) */
- #endif
- #endif
|