/* * Copyright (c) 2002 Michael Shalayeff. All rights reserved. * Copyright (c) 2003 Ryan McBride. All rights reserved. * * 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 ``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 HIS RELATIVES 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 MIND, 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. */ /* * $FreeBSD: src/sys/netinet/ip_carp.h,v 1.3 2006/12/01 18:37:41 imp Exp $ * $OpenBSD: ip_carp.h,v 1.8 2004/07/29 22:12:15 mcbride Exp $ * $DragonFly: src/sys/netinet/ip_carp.h,v 1.1 2007/08/16 20:03:57 dillon Exp $ */ #ifndef _IP_CARP_H #define _IP_CARP_H #include <sys/ioccom.h> /* * The CARP header layout is as follows: * * 0 1 2 3 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |Version| Type | VirtualHostID | AdvSkew | Auth Len | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Reserved | AdvBase | Checksum | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Counter (1) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Counter (2) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | SHA-1 HMAC (1) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | SHA-1 HMAC (2) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | SHA-1 HMAC (3) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | SHA-1 HMAC (4) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | SHA-1 HMAC (5) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ struct carp_header { #if BYTE_ORDER == LITTLE_ENDIAN uint8_t carp_type:4, carp_version:4; #endif #if BYTE_ORDER == BIG_ENDIAN uint8_t carp_version:4, carp_type:4; #endif uint8_t carp_vhid; /* virtual host id */ uint8_t carp_advskew; /* advertisement skew */ uint8_t carp_authlen; /* size of counter+md, 32bit chunks */ uint8_t carp_pad1; /* reserved */ uint8_t carp_advbase; /* advertisement interval */ uint16_t carp_cksum; uint32_t carp_counter[2]; unsigned char carp_md[20]; /* SHA1 HMAC */ } __packed; #ifdef CTASSERT CTASSERT(sizeof(struct carp_header) == 36); #endif #define CARP_DFLTTL 255 /* carp_version */ #define CARP_VERSION 2 /* carp_type */ #define CARP_ADVERTISEMENT 0x01 #define CARP_KEY_LEN 20 /* a sha1 hash of a passphrase */ /* carp_advbase */ #define CARP_DFLTINTV 1 /* * Statistics. */ struct carpstats { uint64_t carps_ipackets; /* total input packets, IPv4 */ uint64_t carps_ipackets6; /* total input packets, IPv6 */ uint64_t carps_badif; /* wrong interface */ uint64_t carps_badttl; /* TTL is not CARP_DFLTTL */ uint64_t carps_hdrops; /* packets shorter than hdr */ uint64_t carps_badsum; /* bad checksum */ uint64_t carps_badver; /* bad (incl unsupp) version */ uint64_t carps_badlen; /* data length does not match */ uint64_t carps_badauth; /* bad authentication */ uint64_t carps_badvhid; /* bad VHID */ uint64_t carps_badaddrs; /* bad address list */ uint64_t carps_opackets; /* total output packets, IPv4 */ uint64_t carps_opackets6; /* total output packets, IPv6 */ uint64_t carps_onomem; /* no memory for an mbuf */ uint64_t carps_ostates; /* total state updates sent */ uint64_t carps_preempt; /* if enabled, preemptions */ }; /* * Configuration structure for SIOCSVH SIOCGVH */ struct carpreq { int carpr_state; #define CARP_STATES "INIT", "BACKUP", "MASTER" #define CARP_MAXSTATE 2 int carpr_vhid; int carpr_advskew; int carpr_advbase; unsigned char carpr_key[CARP_KEY_LEN]; }; #define SIOCSVH _IOWR('i', 245, struct ifreq) #define SIOCGVH _IOWR('i', 246, struct ifreq) struct ifcarpvhaddr { uint32_t carpa_flags; /* CARP_VHAF_ */ struct sockaddr_in carpa_addr; /* carp address */ struct sockaddr_in carpa_baddr; /* backing address */ }; #define CARP_VHAF_OWNER 0x1 #define CARP_VHAF_ONLIST 0x2 #define CARPGDEVNAME 0 /* SIOCGDRVSPEC char[IFNAMSIZ] */ #define CARPGVHADDR 1 /* SIOCGDRVSPEC ifcarpvhaddr array */ /* * Names for CARP sysctl objects */ #define CARPCTL_ALLOW 1 /* accept incoming CARP packets */ #define CARPCTL_PREEMPT 2 /* high-pri backup preemption mode */ #define CARPCTL_LOG 3 /* log bad packets */ #define CARPCTL_STATS 4 /* statistics (read-only) */ #define CARPCTL_ARPBALANCE 5 /* balance arp responses */ #define CARPCTL_SETROUTE 6 /* change routes */ #define CARPCTL_MAXID 7 #ifdef _KERNEL void carp_group_demote_adj(struct ifnet *, int); int carp_proto_input(struct mbuf **, int *, int); int carp6_proto_input(struct mbuf **, int *, int); void carp_proto_ctlinput(netmsg_t); int carp_iamatch(const struct in_ifaddr *); struct ifaddr *carp_iamatch6(void *, struct in6_addr *); void *carp_macmatch6(void *, struct mbuf *, const struct in6_addr *); struct mbuf *carp_input(void *, struct mbuf *); struct ifnet *carp_parent(struct ifnet *); #endif /* _KERNEL */ #endif /* _IP_CARP_H */
