/*
* Soft: Keepalived is a failover program for the LVS project
* <www.linuxvirtualserver.org>. It monitor & manipulate
* a loadbalanced server pool using multi-layer checks.
*
* Part: keepalived_netlink.c include file.
*
* Author: Alexandre Cassen, <acassen@linux-vs.org>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Copyright (C) 2001-2017 Alexandre Cassen, <acassen@gmail.com>
*/
#ifndef _VRRP_NETLINK_H
#define _VRRP_NETLINK_H 1
#include "config.h"
/* global includes */
#include <stdint.h>
#include <stdbool.h>
#include <sys/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
/* local includes */
#include "scheduler.h"
#ifdef _WITH_VRRP_
#include "vrrp_if.h"
#endif
/* types definitions */
typedef struct _nl_handle {
int fd;
uint32_t nl_pid;
__u32 seq;
thread_ref_t thread;
} nl_handle_t;
/* Define types */
#ifndef NLMSG_TAIL
#define NLMSG_TAIL(nmsg) ((void *)(((char *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
#endif
#if !defined SOL_NETLINK
#define SOL_NETLINK 270
#endif
#define RTA_TAIL(rta) ((struct rtattr *)(((char *) (rta)) + RTA_ALIGN((rta)->rta_len)))
/* Global vars exported */
#ifdef _WITH_VRRP_
extern nl_handle_t nl_cmd; /* Command channel */
extern int netlink_error_ignore; /* If we get this error, ignore it */
#endif
#ifdef _NETLINK_TIMERS_
extern bool do_netlink_timers;
#endif
/* prototypes */
#ifdef _NETLINK_TIMERS_
extern void report_and_clear_netlink_timers(const char *);
#endif
extern int addattr_l(struct nlmsghdr *, size_t, unsigned short, const void *, size_t);
extern int addattr_l2(struct nlmsghdr *, size_t, unsigned short, const void *, size_t, const void *, size_t);
extern int addraw_l(struct nlmsghdr *, size_t, const void *, size_t);
static inline int
addattr8(struct nlmsghdr *n, size_t maxlen, unsigned short type, uint8_t data)
{
return addattr_l(n, maxlen, type, &data, sizeof data);
}
static inline int
addattr16(struct nlmsghdr *n, size_t maxlen, unsigned short type, uint16_t data)
{
return addattr_l(n, maxlen, type, &data, sizeof data);
}
static inline int
addattr32(struct nlmsghdr *n, size_t maxlen, unsigned short type, uint32_t data)
{
return addattr_l(n, maxlen, type, &data, sizeof data);
}
static inline int
addattr64(struct nlmsghdr *n, size_t maxlen, unsigned short type, uint64_t data)
{
return addattr_l(n, maxlen, type, &data, sizeof(data));
}
#ifdef _WITH_VRRP_
extern size_t rta_addattr_l(struct rtattr *, size_t, unsigned short, const void *, size_t);
extern size_t rta_addattr_l2(struct rtattr *, size_t, unsigned short, const void *, size_t, const void*, size_t);
static inline size_t
rta_addattr8(struct rtattr *rta, size_t maxlen, unsigned short type, uint8_t data)
{
return rta_addattr_l(rta, maxlen, type, &data, sizeof data);
}
static inline size_t
rta_addattr16(struct rtattr *rta, size_t maxlen, unsigned short type, uint16_t data)
{
return rta_addattr_l(rta, maxlen, type, &data, sizeof data);
}
static inline size_t
rta_addattr32(struct rtattr *rta, size_t maxlen, unsigned short type, uint32_t data)
{
return rta_addattr_l(rta, maxlen, type, &data, sizeof data);
}
static inline size_t
rta_addattr64(struct rtattr *rta, size_t maxlen, unsigned short type, uint64_t data)
{
return rta_addattr_l(rta, maxlen, type, &data, sizeof data);
}
extern struct rtattr *rta_nest(struct rtattr *, size_t, unsigned short);
extern size_t rta_nest_end(struct rtattr *, struct rtattr *);
extern ssize_t netlink_talk(nl_handle_t *, struct nlmsghdr *);
extern int netlink_interface_lookup(char *);
extern void kernel_netlink_poll(void);
extern void process_if_status_change(interface_t *);
#endif
extern void kernel_netlink_set_recv_bufs(void);
#ifdef _HAVE_FIB_ROUTING_
extern void set_extra_netlink_monitoring(bool, bool, bool, bool);
#endif
extern void kernel_netlink_init(void);
extern void cancel_kernel_netlink_threads(void);
#if defined _WITH_VRRP_ || defined _WITH_LVS_
extern void kernel_netlink_read_interfaces(void);
#endif
extern void kernel_netlink_close(void);
extern void kernel_netlink_close_monitor(void);
extern void kernel_netlink_close_cmd(void);
#ifdef THREAD_DUMP
extern void register_keepalived_netlink_addresses(void);
#endif
#endif