#include <sys/cdefs.h>
#include "opt_bpf.h"
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/devctl.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/taskqueue.h>
#include <sys/counter.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_llatbl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/vnet.h>
#include <crypto/sha1.h>

Include dependency graph for ip_carp.c:

Data Structures
struct	carp_softc

struct	carp_if

Macros
#define	CARP_SENDAD_MAX_ERRORS 3

#define	CARP_SENDAD_MIN_SUCCESS 3

#define	CARP_HMAC_PAD 64

#define	CIF_PROMISC 0x00000001

#define	CARP_INET 0

#define	CARP_INET6 1

#define	V_carp_allow VNET(carp_allow)

#define	V_carp_dscp VNET(carp_dscp)

#define	V_carp_preempt VNET(carp_preempt)

#define	V_carp_log VNET(carp_log)

#define	V_carp_demotion VNET(carp_demotion)

#define	V_carp_senderr_adj VNET(carp_senderr_adj)

#define	V_carp_ifdown_adj VNET(carp_ifdown_adj)

#define	CARPSTATS_ADD(name, val)

#define	CARPSTATS_INC(name) CARPSTATS_ADD(name, 1)

#define	CARP_LOCK_INIT(sc)

#define	CARP_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx)

#define	CARP_LOCK_ASSERT(sc) mtx_assert(&(sc)->sc_mtx, MA_OWNED)

#define	CARP_LOCK(sc) mtx_lock(&(sc)->sc_mtx)

#define	CARP_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)

#define	CIF_LOCK_INIT(cif)

#define	CIF_LOCK_DESTROY(cif) mtx_destroy(&(cif)->cif_mtx)

#define	CIF_LOCK_ASSERT(cif) mtx_assert(&(cif)->cif_mtx, MA_OWNED)

#define	CIF_LOCK(cif) mtx_lock(&(cif)->cif_mtx)

#define	CIF_UNLOCK(cif) mtx_unlock(&(cif)->cif_mtx)

#define	CIF_FREE(cif)

#define	CARP_LOG(...)

#define	CARP_DEBUG(...)

#define	IFNET_FOREACH_IFA(ifp, ifa)

#define	CARP_FOREACH_IFA(sc, ifa)

#define	IFNET_FOREACH_CARP(ifp, sc)

#define	DEMOTE_ADVSKEW(sc)

Functions
	__FBSDID ("$FreeBSD$")

static	MALLOC_DEFINE (M_CARP, "CARP", "CARP addresses")

	VNET_DEFINE_STATIC (int, carp_allow)

	VNET_DEFINE_STATIC (int, carp_dscp)

	VNET_DEFINE_STATIC (int, carp_preempt)=0

	VNET_DEFINE_STATIC (int, carp_log)

	VNET_DEFINE_STATIC (int, carp_demotion)=0

	VNET_DEFINE_STATIC (int, carp_senderr_adj)

	VNET_DEFINE_STATIC (int, carp_ifdown_adj)

static int	carp_allow_sysctl (SYSCTL_HANDLER_ARGS)

static int	carp_dscp_sysctl (SYSCTL_HANDLER_ARGS)

static int	carp_demote_adj_sysctl (SYSCTL_HANDLER_ARGS)

	SYSCTL_NODE (_net_inet, IPPROTO_CARP, carp, CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, "CARP")

	SYSCTL_PROC (_net_inet_carp, OID_AUTO, allow, CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, 0, carp_allow_sysctl, "I", "Accept incoming CARP packets")

	SYSCTL_PROC (_net_inet_carp, OID_AUTO, dscp, CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, 0, carp_dscp_sysctl, "I", "DSCP value for carp packets")

	SYSCTL_INT (_net_inet_carp, OID_AUTO, preempt, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(carp_preempt), 0, "High-priority backup preemption mode")

	SYSCTL_INT (_net_inet_carp, OID_AUTO, log, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(carp_log), 0, "CARP log level")

	SYSCTL_PROC (_net_inet_carp, OID_AUTO, demotion, CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, 0, carp_demote_adj_sysctl, "I", "Adjust demotion factor (skew of advskew)")

	SYSCTL_INT (_net_inet_carp, OID_AUTO, senderr_demotion_factor, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(carp_senderr_adj), 0, "Send error demotion factor adjustment")

	SYSCTL_INT (_net_inet_carp, OID_AUTO, ifdown_demotion_factor, CTLFLAG_VNET\|CTLFLAG_RW, &VNET_NAME(carp_ifdown_adj), 0, "Interface down demotion factor adjustment")

	VNET_PCPUSTAT_DEFINE (struct carpstats, carpstats)

	VNET_PCPUSTAT_SYSINIT (carpstats)

	VNET_PCPUSTAT_SYSUNINIT (carpstats)

	SYSCTL_VNET_PCPUSTAT (_net_inet_carp, OID_AUTO, stats, struct carpstats, carpstats, "CARP statistics (struct carpstats, netinet/ip_carp.h)")

static void	carp_input_c (struct mbuf , struct carp_header , sa_family_t)

static struct carp_softc *	carp_alloc (struct ifnet *)

static void	carp_destroy (struct carp_softc *)

static struct carp_if *	carp_alloc_if (struct ifnet *)

static void	carp_free_if (struct carp_if *)

static void	carp_set_state (struct carp_softc , int, const char reason)

static void	carp_sc_state (struct carp_softc *)

static void	carp_setrun (struct carp_softc *, sa_family_t)

static void	carp_master_down (void *)

static void	carp_master_down_locked (struct carp_softc , const char reason)

static void	carp_send_ad (void *)

static void	carp_send_ad_locked (struct carp_softc *)

static void	carp_addroute (struct carp_softc *)

static void	carp_ifa_addroute (struct ifaddr *)

static void	carp_delroute (struct carp_softc *)

static void	carp_ifa_delroute (struct ifaddr *)

static void	carp_send_ad_all (void *, int)

static void	carp_demote_adj (int, char *)

static	LIST_HEAD (carp_softc)

static void	carp_hmac_generate (struct carp_softc *sc, uint32_t counter[2], unsigned char md[20])

static int	carp_hmac_verify (struct carp_softc *sc, uint32_t counter[2], unsigned char md[20])

static int	carp_source_is_self (struct mbuf m, struct ifaddr ifa, sa_family_t af)

static int	carp_prepare_ad (struct mbuf m, struct carp_softc sc, struct carp_header *ch)

static void	carp_send_ad_all (void *ctx __unused, int pending __unused)

static void	carp_send_ad_error (struct carp_softc *sc, int error)

static struct ifaddr *	carp_best_ifa (int af, struct ifnet *ifp)

int	carp_master (struct ifaddr *ifa)

int	carp_forus (struct ifnet ifp, u_char dhost)

static int	carp_multicast_setup (struct carp_if *cif, sa_family_t sa)

static void	carp_multicast_cleanup (struct carp_if *cif, sa_family_t sa)

int	carp_output (struct ifnet ifp, struct mbuf m, const struct sockaddr *sa)

static void	carp_grow_ifas (struct carp_softc *sc)

static void	carp_carprcp (struct carpreq carpr, struct carp_softc sc, int priv)

int	carp_ioctl (struct ifreq ifr, u_long cmd, struct thread td)

static int	carp_get_vhid (struct ifaddr *ifa)

int	carp_attach (struct ifaddr *ifa, int vhid)

void	carp_detach (struct ifaddr *ifa, bool keep_cif)

static void	carp_linkstate (struct ifnet *ifp)

static void	carp_mod_cleanup (void)

static int	carp_mod_load (void)

static int	carp_modevent (module_t mod, int type, void *data)

	DECLARE_MODULE (carp, carp_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY)

Variables
static int	proto_reg [] = {-1, -1}

static moduledata_t	carp_mod

Macro Definition Documentation

◆ CARP_DEBUG

#define CARP_DEBUG ( ... )

Value:

        do {                            \
        if (V_carp_log > 1)                             \
                log(LOG_DEBUG, __VA_ARGS__);            \
} while (0)

Definition at line 284 of file ip_carp.c.

◆ CARP_FOREACH_IFA

#define CARP_FOREACH_IFA	(	sc,
		ifa
	)

Value:

        CARP_LOCK_ASSERT(sc);                                           \
        for (int _i = 0;                                                \
                _i < (sc)->sc_naddrs + (sc)->sc_naddrs6 &&              \
                ((ifa) = sc->sc_ifas[_i]) != NULL;                      \
                ++_i)

Definition at line 293 of file ip_carp.c.

◆ CARP_HMAC_PAD

#define CARP_HMAC_PAD 64

Definition at line 122 of file ip_carp.c.

◆ CARP_INET

#define CARP_INET 0

Definition at line 151 of file ip_carp.c.

◆ CARP_INET6

#define CARP_INET6 1

Definition at line 152 of file ip_carp.c.

◆ CARP_LOCK

#define CARP_LOCK ( sc ) mtx_lock(&(sc)->sc_mtx)

Definition at line 263 of file ip_carp.c.

◆ CARP_LOCK_ASSERT

#define CARP_LOCK_ASSERT ( sc ) mtx_assert(&(sc)->sc_mtx, MA_OWNED)

Definition at line 262 of file ip_carp.c.

◆ CARP_LOCK_DESTROY

#define CARP_LOCK_DESTROY ( sc ) mtx_destroy(&(sc)->sc_mtx)

Definition at line 261 of file ip_carp.c.

◆ CARP_LOCK_INIT

#define CARP_LOCK_INIT ( sc )

Value:

mtx_init(&(sc)->sc_mtx, "carp_softc", \

NULL, MTX_DEF)

Definition at line 259 of file ip_carp.c.

◆ CARP_LOG

#define CARP_LOG ( ... )

Value:

        do {                            \
        if (V_carp_log > 0)                             \
                log(LOG_INFO, "carp: " __VA_ARGS__);    \
} while (0)

Definition at line 279 of file ip_carp.c.

◆ CARP_SENDAD_MAX_ERRORS

#define CARP_SENDAD_MAX_ERRORS 3

Definition at line 114 of file ip_carp.c.

◆ CARP_SENDAD_MIN_SUCCESS

#define CARP_SENDAD_MIN_SUCCESS 3

Definition at line 116 of file ip_carp.c.

◆ CARP_UNLOCK

#define CARP_UNLOCK ( sc ) mtx_unlock(&(sc)->sc_mtx)

Definition at line 264 of file ip_carp.c.

◆ CARPSTATS_ADD

#define CARPSTATS_ADD	(	name,
		val
	)

Value:

counter_u64_add(VNET(carpstats)[offsetof(struct carpstats, name) / \

sizeof(uint64_t)], (val))

carpstats

Definition: ip_carp.h:101

Definition at line 251 of file ip_carp.c.

◆ CARPSTATS_INC

#define CARPSTATS_INC ( name ) CARPSTATS_ADD(name, 1)

Definition at line 254 of file ip_carp.c.

◆ CIF_FREE

#define CIF_FREE ( cif )

Value:

                do {                            \
                CIF_LOCK(cif);                          \
                if (TAILQ_EMPTY(&(cif)->cif_vrs))       \
                        carp_free_if(cif);              \
		else					\
			CIF_UNLOCK(cif);             \
} while (0)

Definition at line 271 of file ip_carp.c.

◆ CIF_LOCK

#define CIF_LOCK ( cif ) mtx_lock(&(cif)->cif_mtx)

Definition at line 269 of file ip_carp.c.

◆ CIF_LOCK_ASSERT

#define CIF_LOCK_ASSERT ( cif ) mtx_assert(&(cif)->cif_mtx, MA_OWNED)

Definition at line 268 of file ip_carp.c.

◆ CIF_LOCK_DESTROY

#define CIF_LOCK_DESTROY ( cif ) mtx_destroy(&(cif)->cif_mtx)

Definition at line 267 of file ip_carp.c.

◆ CIF_LOCK_INIT

#define CIF_LOCK_INIT ( cif )

Value:

mtx_init(&(cif)->cif_mtx, "carp_if", \

NULL, MTX_DEF)

Definition at line 265 of file ip_carp.c.

◆ CIF_PROMISC

#define CIF_PROMISC 0x00000001

◆ CIF_UNLOCK

#define CIF_UNLOCK ( cif ) mtx_unlock(&(cif)->cif_mtx)

Definition at line 270 of file ip_carp.c.

◆ DEMOTE_ADVSKEW

#define DEMOTE_ADVSKEW ( sc )

Value:

    (((sc)->sc_advskew + V_carp_demotion > CARP_MAXSKEW) ?      \
    CARP_MAXSKEW :                                              \
        (((sc)->sc_advskew + V_carp_demotion < 0) ?             \
        0 : ((sc)->sc_advskew + V_carp_demotion)))

Definition at line 305 of file ip_carp.c.

◆ IFNET_FOREACH_CARP

#define IFNET_FOREACH_CARP	(	ifp,
		sc
	)

Value:

        KASSERT(mtx_owned(&ifp->if_carp->cif_mtx) ||                    \
            sx_xlocked(&carp_sx), ("cif_vrs not locked"));              \
        TAILQ_FOREACH((sc), &(ifp)->if_carp->cif_vrs, sc_list)

Definition at line 300 of file ip_carp.c.

◆ IFNET_FOREACH_IFA

#define IFNET_FOREACH_IFA	(	ifp,
		ifa
	)

Value:

CK_STAILQ_FOREACH((ifa), &(ifp)->if_addrhead, ifa_link) \

if ((ifa)->ifa_carp != NULL)

Definition at line 289 of file ip_carp.c.

◆ V_carp_allow

#define V_carp_allow VNET(carp_allow)

Definition at line 191 of file ip_carp.c.

◆ V_carp_demotion

#define V_carp_demotion VNET(carp_demotion)

Definition at line 207 of file ip_carp.c.

◆ V_carp_dscp

#define V_carp_dscp VNET(carp_dscp)

Definition at line 195 of file ip_carp.c.

◆ V_carp_ifdown_adj

#define V_carp_ifdown_adj VNET(carp_ifdown_adj)

Definition at line 215 of file ip_carp.c.

◆ V_carp_log

#define V_carp_log VNET(carp_log)

Definition at line 203 of file ip_carp.c.

◆ V_carp_preempt

#define V_carp_preempt VNET(carp_preempt)

Definition at line 199 of file ip_carp.c.

◆ V_carp_senderr_adj

#define V_carp_senderr_adj VNET(carp_senderr_adj)

Definition at line 211 of file ip_carp.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ carp_addroute()

static void carp_addroute ( struct carp_softc * sc )

static

Definition at line 1062 of file ip_carp.c.

References CARP_FOREACH_IFA, and carp_ifa_addroute().

Referenced by carp_master_down_locked().

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◆ carp_alloc()

static struct carp_softc * carp_alloc ( struct ifnet * ifp )

static

Definition at line 1580 of file ip_carp.c.

References carp_alloc_if(), CARP_DFLTINTV, CARP_LOCK_INIT, CIF_LOCK, CIF_UNLOCK, carp_softc::sc_ad_tmo, carp_softc::sc_advbase, carp_softc::sc_carpdev, carp_softc::sc_ifas, carp_softc::sc_ifasiz, carp_softc::sc_init_counter, carp_softc::sc_mtx, carp_softc::sc_state, and carp_softc::sc_vhid.

Referenced by carp_ioctl().

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◆ carp_alloc_if()

static struct carp_if * carp_alloc_if ( struct ifnet * ifp )

static

Definition at line 1669 of file ip_carp.c.

References CIF_LOCK_INIT, and CIF_PROMISC.

Referenced by carp_alloc().

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◆ carp_allow_sysctl()

static int carp_allow_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 2118 of file ip_carp.c.

References CARP_LOCK, carp_sc_state(), CARP_UNLOCK, carp_softc::sc_carpdev, and V_carp_allow.

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◆ carp_attach()

int carp_attach	(	struct ifaddr *	ifa,
		int	vhid
	)

Definition at line 1910 of file ip_carp.c.

References carp_grow_ifas(), CARP_LOCK, carp_multicast_setup(), carp_sc_state(), CARP_UNLOCK, CIF_FREE, IFNET_FOREACH_CARP, carp_softc::sc_ifas, carp_softc::sc_ifasiz, carp_softc::sc_naddrs, carp_softc::sc_naddrs6, and carp_softc::sc_vhid.

Referenced by carp_mod_load().

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◆ carp_best_ifa()

static struct ifaddr * carp_best_ifa	(	int	af,
		struct ifnet *	ifp
	)

static

Definition at line 900 of file ip_carp.c.

Referenced by carp_send_ad_locked().

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◆ carp_carprcp()

static void carp_carprcp	(	struct carpreq *	carpr,
		struct carp_softc *	sc,
		int	priv
	)

static

Definition at line 1717 of file ip_carp.c.

References CARP_LOCK, CARP_UNLOCK, carpreq::carpr_advbase, carpreq::carpr_advskew, carpreq::carpr_key, carpreq::carpr_state, carpreq::carpr_vhid, carp_softc::sc_advbase, carp_softc::sc_advskew, carp_softc::sc_key, carp_softc::sc_state, and carp_softc::sc_vhid.

Referenced by carp_ioctl().

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◆ carp_delroute()

static void carp_delroute ( struct carp_softc * sc )

static

Definition at line 1093 of file ip_carp.c.

References CARP_FOREACH_IFA, and carp_ifa_delroute().

Referenced by carp_input_c(), and carp_ioctl().

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◆ carp_demote_adj()

static void carp_demote_adj	(	int	adj,
		char *	reason
	)

static

Definition at line 2110 of file ip_carp.c.

References CARP_LOG, and V_carp_demotion.

Referenced by carp_demote_adj_sysctl(), carp_destroy(), carp_mod_load(), carp_sc_state(), and carp_send_ad_error().

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◆ carp_demote_adj_sysctl()

static int carp_demote_adj_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 2163 of file ip_carp.c.

References carp_demote_adj(), and V_carp_demotion.

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◆ carp_destroy()

static void carp_destroy ( struct carp_softc * sc )

static

Definition at line 1636 of file ip_carp.c.

References carp_demote_adj(), CARP_LOCK_DESTROY, CARP_UNLOCK, CIF_LOCK, CIF_UNLOCK, carp_softc::sc_ad_tmo, carp_softc::sc_carpdev, carp_softc::sc_ifas, carp_softc::sc_suppress, and V_carp_ifdown_adj.

Referenced by carp_detach().

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◆ carp_detach()

void carp_detach	(	struct ifaddr *	ifa,
		bool	keep_cif
	)

Definition at line 1986 of file ip_carp.c.

References carp_destroy(), carp_ifa_delroute(), CARP_LOCK, carp_multicast_cleanup(), carp_sc_state(), CARP_UNLOCK, CIF_FREE, carp_softc::sc_ifas, carp_softc::sc_naddrs, and carp_softc::sc_naddrs6.

Referenced by carp_mod_load().

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◆ carp_dscp_sysctl()

static int carp_dscp_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 2145 of file ip_carp.c.

References V_carp_dscp.

◆ carp_forus()

int carp_forus	(	struct ifnet *	ifp,
		u_char *	dhost
	)

Definition at line 1243 of file ip_carp.c.

References CIF_LOCK, CIF_UNLOCK, IFNET_FOREACH_CARP, carp_softc::MASTER, carp_softc::sc_addr, and carp_softc::sc_state.

Referenced by carp_mod_load().

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◆ carp_free_if()

static void carp_free_if ( struct carp_if * cif )

static

Definition at line 1695 of file ip_carp.c.

References CIF_LOCK_ASSERT, CIF_LOCK_DESTROY, and CIF_PROMISC.

◆ carp_get_vhid()

static int carp_get_vhid ( struct ifaddr * ifa )

static

Definition at line 1900 of file ip_carp.c.

Referenced by carp_mod_load().

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◆ carp_grow_ifas()

static void carp_grow_ifas ( struct carp_softc * sc )

static

Definition at line 1622 of file ip_carp.c.

References CARP_LOCK, CARP_UNLOCK, carp_softc::sc_ifas, and carp_softc::sc_ifasiz.

Referenced by carp_attach().

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◆ carp_hmac_generate()

static void carp_hmac_generate	(	struct carp_softc *	sc,
		uint32_t	counter[2],
		unsigned char	md[20]
	)

static

Definition at line 414 of file ip_carp.c.

References CARP_LOCK_ASSERT, carp_softc::sc_counter, carp_softc::sc_pad, and carp_softc::sc_sha1.

Referenced by carp_hmac_verify(), and carp_prepare_ad().

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◆ carp_hmac_verify()

static int carp_hmac_verify	(	struct carp_softc *	sc,
		uint32_t	counter[2],
		unsigned char	md[20]
	)

static

Definition at line 435 of file ip_carp.c.

References carp_hmac_generate(), and CARP_LOCK_ASSERT.

Referenced by carp_input_c().

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◆ carp_ifa_addroute()

static void carp_ifa_addroute ( struct ifaddr * ifa )

static

Definition at line 1071 of file ip_carp.c.

References ifatoia, and in_addprefix().

Referenced by carp_addroute().

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◆ carp_ifa_delroute()

static void carp_ifa_delroute ( struct ifaddr * ifa )

static

Definition at line 1102 of file ip_carp.c.

References ifatoia, and in_scrubprefix().

Referenced by carp_delroute(), and carp_detach().

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◆ carp_input_c()

static void carp_input_c	(	struct mbuf *	m,
		struct carp_header *	ch,
		sa_family_t	af
	)

static

Definition at line 647 of file ip_carp.c.

References carp_header::carp_advbase, carp_header::carp_advskew, carp_header::carp_counter, CARP_DEBUG, carp_delroute(), carp_hmac_verify(), CARP_LOCK, carp_master_down_locked(), carp_header::carp_md, carp_set_state(), carp_setrun(), carp_source_is_self(), CARP_UNLOCK, carp_header::carp_version, CARP_VERSION, carp_header::carp_vhid, CARPSTATS_INC, DEMOTE_ADVSKEW, IFNET_FOREACH_IFA, carp_softc::sc_ad_tmo, carp_softc::sc_advbase, carp_softc::sc_counter, carp_softc::sc_init_counter, carp_softc::sc_state, carp_softc::sc_vhid, and V_carp_preempt.

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◆ carp_ioctl()

int carp_ioctl	(	struct ifreq *	ifr,
		u_long	cmd,
		struct thread *	td
	)

Definition at line 1733 of file ip_carp.c.

References carp_softc::BACKUP, carp_alloc(), carp_carprcp(), carp_delroute(), CARP_DFLTINTV, CARP_LOCK, carp_master_down_locked(), CARP_MAXVHID, carp_set_state(), carp_setrun(), CARP_UNLOCK, carpreq::carpr_advbase, carpreq::carpr_advskew, carpreq::carpr_count, carpreq::carpr_key, carpreq::carpr_state, carpreq::carpr_vhid, CIF_UNLOCK, count, IFNET_FOREACH_CARP, carp_softc::INIT, carp_softc::MASTER, carp_softc::sc_ad_tmo, carp_softc::sc_addr, carp_softc::sc_advbase, carp_softc::sc_advskew, carp_softc::sc_key, carp_softc::sc_state, carp_softc::sc_vhid, SIOCGVH, and SIOCSVH.

Referenced by carp_mod_load().

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◆ carp_linkstate()

static void carp_linkstate ( struct ifnet * ifp )

static

Definition at line 2066 of file ip_carp.c.

References CARP_LOCK, carp_sc_state(), CARP_UNLOCK, CIF_LOCK, CIF_UNLOCK, and IFNET_FOREACH_CARP.

Referenced by carp_mod_load().

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◆ carp_master()

int carp_master ( struct ifaddr * ifa )

Definition at line 1124 of file ip_carp.c.

References carp_softc::MASTER, and carp_softc::sc_state.

Referenced by carp_mod_load().

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◆ carp_master_down()

static void carp_master_down ( void * v )

static

Definition at line 1270 of file ip_carp.c.

References CARP_LOCK_ASSERT, carp_master_down_locked(), CARP_UNLOCK, carp_softc::sc_carpdev, and carp_softc::sc_state.

Referenced by carp_setrun().

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◆ carp_master_down_locked()

static void carp_master_down_locked	(	struct carp_softc *	sc,
		const char *	reason
	)

static

Definition at line 1289 of file ip_carp.c.

References carp_addroute(), CARP_LOCK_ASSERT, carp_send_ad_locked(), carp_set_state(), carp_setrun(), carp_softc::sc_carpdev, carp_softc::sc_state, and carp_softc::sc_vhid.

Referenced by carp_input_c(), carp_ioctl(), and carp_master_down().

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◆ carp_mod_cleanup()

static void carp_mod_cleanup ( void )

static

Definition at line 2206 of file ip_carp.c.

References carp_attach_p, carp_demote_adj_p, carp_detach_p, carp_forus_p, carp_get_vhid_p, CARP_INET, CARP_INET6, carp_ioctl_p, carp_linkstate_p, carp_master_p, carp_output_p, ipproto_unregister(), and proto_reg.

Referenced by carp_mod_load(), and carp_modevent().

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◆ carp_mod_load()

static int carp_mod_load ( void )

static

Definition at line 2242 of file ip_carp.c.

References carp_attach(), carp_attach_p, carp_demote_adj(), carp_demote_adj_p, carp_detach(), carp_detach_p, carp_forus(), carp_forus_p, carp_get_vhid(), carp_get_vhid_p, carp_iamatch(), carp_iamatch6(), CARP_INET, CARP_INET6, carp_ioctl(), carp_ioctl_p, carp_linkstate(), carp_linkstate_p, carp_macmatch6(), carp_master(), carp_master_p, carp_mod_cleanup(), carp_output(), carp_output_p, ipproto_register(), and proto_reg.

Referenced by carp_modevent().

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◆ carp_modevent()

static int carp_modevent	(	module_t	mod,
		int	type,
		void *	data
	)

static

Definition at line 2296 of file ip_carp.c.

References carp_mod_cleanup(), and carp_mod_load().

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◆ carp_multicast_cleanup()

static void carp_multicast_cleanup	(	struct carp_if *	cif,
		sa_family_t	sa
	)

static

Definition at line 1486 of file ip_carp.c.

References in_mfilter::imf_inm, in_leavegroup(), ip_mfilter_first(), ip_mfilter_free(), and ip_mfilter_remove().

Referenced by carp_detach().

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◆ carp_multicast_setup()

static int carp_multicast_setup	(	struct carp_if *	cif,
		sa_family_t	sa
	)

static

Definition at line 1386 of file ip_carp.c.

References CARP_DFLTTL, in_mfilter::imf_inm, in_joingroup(), ip_mfilter_alloc(), ip_mfilter_first(), ip_mfilter_free(), ip_mfilter_init(), ip_mfilter_insert(), and in_addr::s_addr.

Referenced by carp_attach().

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◆ carp_output()

int carp_output	(	struct ifnet *	ifp,
		struct mbuf *	m,
		const struct sockaddr *	sa
	)

Definition at line 1527 of file ip_carp.c.

References carp_softc::sc_vhid.

Referenced by carp_mod_load().

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◆ carp_prepare_ad()

static int carp_prepare_ad	(	struct mbuf *	m,
		struct carp_softc *	sc,
		struct carp_header *	ch
	)

static

Definition at line 783 of file ip_carp.c.

References carp_header::carp_counter, carp_hmac_generate(), carp_header::carp_md, CARPSTATS_INC, carp_softc::sc_counter, and carp_softc::sc_init_counter.

Referenced by carp_send_ad_locked().

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◆ carp_sc_state()

static void carp_sc_state ( struct carp_softc * sc )

static

Definition at line 2080 of file ip_carp.c.

References carp_demote_adj(), CARP_LOCK_ASSERT, carp_set_state(), carp_setrun(), carp_softc::INIT, carp_softc::sc_ad_tmo, carp_softc::sc_carpdev, carp_softc::sc_suppress, V_carp_allow, and V_carp_ifdown_adj.

Referenced by carp_allow_sysctl(), carp_attach(), carp_detach(), and carp_linkstate().

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◆ carp_send_ad()

static void carp_send_ad ( void * v )

static

Definition at line 839 of file ip_carp.c.

References CARP_LOCK_ASSERT, carp_send_ad_locked(), CARP_UNLOCK, and carp_softc::sc_carpdev.

Referenced by carp_send_ad_locked(), and carp_setrun().

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◆ carp_send_ad_all() [1/2]

static void carp_send_ad_all	(	void *	,
		int
	)

static

◆ carp_send_ad_all() [2/2]

static void carp_send_ad_all	(	void *ctx	__unused,
		int pending	__unused
	)

static

Definition at line 818 of file ip_carp.c.

References CARP_LOCK, carp_send_ad_locked(), CARP_UNLOCK, carp_softc::sc_carpdev, and carp_softc::sc_state.

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◆ carp_send_ad_error()

static void carp_send_ad_error	(	struct carp_softc *	sc,
		int	error
	)

static

Definition at line 854 of file ip_carp.c.

References carp_demote_adj(), CARP_SENDAD_MAX_ERRORS, CARP_SENDAD_MIN_SUCCESS, carp_softc::sc_carpdev, carp_softc::sc_sendad_errors, carp_softc::sc_sendad_success, and V_carp_senderr_adj.

Referenced by carp_send_ad_locked().

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◆ carp_send_ad_locked()

static void carp_send_ad_locked ( struct carp_softc * sc )

static

Definition at line 920 of file ip_carp.c.

References carp_header::carp_advbase, CARP_ADVERTISEMENT, carp_header::carp_advskew, carp_header::carp_authlen, carp_best_ifa(), carp_header::carp_cksum, CARP_DEBUG, CARP_DFLTTL, CARP_LOCK_ASSERT, carp_header::carp_pad1, carp_prepare_ad(), carp_send_ad(), carp_send_ad_error(), carp_header::carp_type, carp_header::carp_version, CARP_VERSION, carp_header::carp_vhid, CARPSTATS_INC, DEMOTE_ADVSKEW, ifatoia, ip6_hdr::ip6_dst, ip6_hdr::ip6_src, IP_DF, ip::ip_dst, ip_fillid(), ip::ip_hl, ip::ip_len, ip::ip_off, ip_output(), ip::ip_p, IP_RAWOUTPUT, ip::ip_sum, ip::ip_tos, ip::ip_ttl, ip::ip_v, IPTOS_DSCP_OFFSET, IPV6_FLOWLABEL_LEN, IPV6_VERSION, IPVERSION, in_addr::s_addr, carp_softc::sc_ad_tmo, carp_softc::sc_advbase, carp_softc::sc_carpdev, carp_softc::sc_naddrs, carp_softc::sc_naddrs6, carp_softc::sc_vhid, and V_carp_dscp.

Referenced by carp_master_down_locked(), carp_send_ad(), and carp_send_ad_all().

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◆ carp_set_state()

static void carp_set_state	(	struct carp_softc *	sc,
		int	state,
		const char *	reason
	)

static

Definition at line 2044 of file ip_carp.c.

References CARP_LOCK_ASSERT, CARP_LOG, CARP_STATES, carp_softc::sc_carpdev, carp_softc::sc_state, carp_softc::sc_vhid, and state.

Referenced by carp_input_c(), carp_ioctl(), carp_master_down_locked(), carp_sc_state(), and carp_setrun().

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◆ carp_setrun()

static void carp_setrun	(	struct carp_softc *	sc,
		sa_family_t	af
	)

static

Definition at line 1325 of file ip_carp.c.

References CARP_LOCK_ASSERT, carp_master_down(), carp_send_ad(), carp_set_state(), carp_setrun(), carp_softc::sc_ad_tmo, carp_softc::sc_advbase, carp_softc::sc_advskew, carp_softc::sc_carpdev, carp_softc::sc_naddrs, carp_softc::sc_naddrs6, carp_softc::sc_state, and V_carp_allow.

Referenced by carp_input_c(), carp_ioctl(), carp_master_down_locked(), carp_sc_state(), and carp_setrun().

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◆ carp_source_is_self()

static int carp_source_is_self	(	struct mbuf *	m,
		struct ifaddr *	ifa,
		sa_family_t	af
	)

static

Definition at line 616 of file ip_carp.c.

References ifatoia, ip6_hdr::ip6_src, and in_addr::s_addr.

Referenced by carp_input_c().

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◆ DECLARE_MODULE()

DECLARE_MODULE	(	carp	,
		carp_mod	,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_ANY
	)

◆ LIST_HEAD()

static LIST_HEAD ( carp_softc )

static

Definition at line 333 of file ip_carp.c.

◆ MALLOC_DEFINE()

static MALLOC_DEFINE	(	M_CARP	,
		"CARP"	,
		"CARP addresses"
	)

static

◆ SYSCTL_INT() [1/4]

SYSCTL_INT	(	_net_inet_carp	,
		OID_AUTO	,
		ifdown_demotion_factor	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEcarp_ifdown_adj,
		0	,
		"Interface down demotion factor adjustment"
	)

◆ SYSCTL_INT() [2/4]

SYSCTL_INT	(	_net_inet_carp	,
		OID_AUTO	,
		log	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEcarp_log,
		0	,
		"CARP log level"
	)

◆ SYSCTL_INT() [3/4]

SYSCTL_INT	(	_net_inet_carp	,
		OID_AUTO	,
		preempt	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEcarp_preempt,
		0	,
		"High-priority backup preemption mode"
	)

◆ SYSCTL_INT() [4/4]

SYSCTL_INT	(	_net_inet_carp	,
		OID_AUTO	,
		senderr_demotion_factor	,
		CTLFLAG_VNET\|	CTLFLAG_RW,
		&	VNET_NAMEcarp_senderr_adj,
		0	,
		"Send error demotion factor adjustment"
	)

◆ SYSCTL_NODE()

SYSCTL_NODE	(	_net_inet	,
		IPPROTO_CARP	,
		carp	,
		CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		"CARP"
	)

◆ SYSCTL_PROC() [1/3]

SYSCTL_PROC	(	_net_inet_carp	,
		OID_AUTO	,
		allow	,
		CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		0	,
		carp_allow_sysctl	,
		"I"	,
		"Accept incoming CARP packets"
	)

◆ SYSCTL_PROC() [2/3]

SYSCTL_PROC	(	_net_inet_carp	,
		OID_AUTO	,
		demotion	,
		CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		0	,
		carp_demote_adj_sysctl	,
		"I"	,
		"Adjust demotion factor (skew of advskew)"
	)

◆ SYSCTL_PROC() [3/3]

SYSCTL_PROC	(	_net_inet_carp	,
		OID_AUTO	,
		dscp	,
		CTLFLAG_VNET\|CTLTYPE_INT\|CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		0	,
		carp_dscp_sysctl	,
		"I"	,
		"DSCP value for carp packets"
	)

◆ SYSCTL_VNET_PCPUSTAT()

SYSCTL_VNET_PCPUSTAT	(	_net_inet_carp	,
		OID_AUTO	,
		stats	,
		struct carpstats	,
		carpstats	,
		"CARP statistics (struct carpstats, netinet/ip_carp.h)"
	)

◆ VNET_DEFINE_STATIC() [1/7]

VNET_DEFINE_STATIC	(	int	,
		carp_allow
	)

◆ VNET_DEFINE_STATIC() [2/7]

VNET_DEFINE_STATIC	(	int	,
		carp_demotion
	)

pure virtual

◆ VNET_DEFINE_STATIC() [3/7]

VNET_DEFINE_STATIC	(	int	,
		carp_dscp
	)

◆ VNET_DEFINE_STATIC() [4/7]

VNET_DEFINE_STATIC	(	int	,
		carp_ifdown_adj
	)

◆ VNET_DEFINE_STATIC() [5/7]

VNET_DEFINE_STATIC	(	int	,
		carp_log
	)

◆ VNET_DEFINE_STATIC() [6/7]

VNET_DEFINE_STATIC	(	int	,
		carp_preempt
	)

pure virtual

◆ VNET_DEFINE_STATIC() [7/7]

VNET_DEFINE_STATIC	(	int	,
		carp_senderr_adj
	)

◆ VNET_PCPUSTAT_DEFINE()

VNET_PCPUSTAT_DEFINE	(	struct carpstats	,
		carpstats
	)

◆ VNET_PCPUSTAT_SYSINIT()

VNET_PCPUSTAT_SYSINIT ( carpstats )

◆ VNET_PCPUSTAT_SYSUNINIT()

VNET_PCPUSTAT_SYSUNINIT ( carpstats )

Variable Documentation

◆ carp_mod

moduledata_t carp_mod

static

Initial value:

= {
        "carp",
        carp_modevent,
        0
}

Definition at line 2319 of file ip_carp.c.

◆ proto_reg

int proto_reg[] = {-1, -1}

static

Definition at line 153 of file ip_carp.c.

Referenced by carp_mod_cleanup(), and carp_mod_load().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ CARP_DEBUG

◆ CARP_FOREACH_IFA

◆ CARP_HMAC_PAD

◆ CARP_INET

◆ CARP_INET6

◆ CARP_LOCK

◆ CARP_LOCK_ASSERT

◆ CARP_LOCK_DESTROY

◆ CARP_LOCK_INIT

◆ CARP_LOG

◆ CARP_SENDAD_MAX_ERRORS

◆ CARP_SENDAD_MIN_SUCCESS

◆ CARP_UNLOCK

◆ CARPSTATS_ADD

◆ CARPSTATS_INC

◆ CIF_FREE

◆ CIF_LOCK

◆ CIF_LOCK_ASSERT

◆ CIF_LOCK_DESTROY

◆ CIF_LOCK_INIT

◆ CIF_PROMISC

◆ CIF_UNLOCK

◆ DEMOTE_ADVSKEW

◆ IFNET_FOREACH_CARP

◆ IFNET_FOREACH_IFA

◆ V_carp_allow

◆ V_carp_demotion

◆ V_carp_dscp

◆ V_carp_ifdown_adj

◆ V_carp_log

◆ V_carp_preempt

◆ V_carp_senderr_adj

Function Documentation

◆ __FBSDID()

◆ carp_addroute()

◆ carp_alloc()

◆ carp_alloc_if()

◆ carp_allow_sysctl()

◆ carp_attach()

◆ carp_best_ifa()

◆ carp_carprcp()

◆ carp_delroute()

◆ carp_demote_adj()

◆ carp_demote_adj_sysctl()

◆ carp_destroy()

◆ carp_detach()

◆ carp_dscp_sysctl()

◆ carp_forus()

◆ carp_free_if()

◆ carp_get_vhid()

◆ carp_grow_ifas()

◆ carp_hmac_generate()

◆ carp_hmac_verify()

◆ carp_ifa_addroute()

◆ carp_ifa_delroute()

◆ carp_input_c()

◆ carp_ioctl()

◆ carp_linkstate()

◆ carp_master()

◆ carp_master_down()

◆ carp_master_down_locked()

◆ carp_mod_cleanup()

◆ carp_mod_load()

◆ carp_modevent()

◆ carp_multicast_cleanup()

◆ carp_multicast_setup()

◆ carp_output()

◆ carp_prepare_ad()

◆ carp_sc_state()

◆ carp_send_ad()

◆ carp_send_ad_all() [1/2]

◆ carp_send_ad_all() [2/2]

◆ carp_send_ad_error()

◆ carp_send_ad_locked()

◆ carp_set_state()