1142215Sglebius/* $FreeBSD: stable/11/sys/netinet/ip_carp.h 338081 2018-08-20 01:01:33Z loos $ */ 2142215Sglebius/* $OpenBSD: ip_carp.h,v 1.8 2004/07/29 22:12:15 mcbride Exp $ */ 3142215Sglebius 4142215Sglebius/* 5142215Sglebius * Copyright (c) 2002 Michael Shalayeff. All rights reserved. 6142215Sglebius * Copyright (c) 2003 Ryan McBride. All rights reserved. 7142215Sglebius * 8142215Sglebius * Redistribution and use in source and binary forms, with or without 9142215Sglebius * modification, are permitted provided that the following conditions 10142215Sglebius * are met: 11142215Sglebius * 1. Redistributions of source code must retain the above copyright 12142215Sglebius * notice, this list of conditions and the following disclaimer. 13142215Sglebius * 2. Redistributions in binary form must reproduce the above copyright 14142215Sglebius * notice, this list of conditions and the following disclaimer in the 15142215Sglebius * documentation and/or other materials provided with the distribution. 16142215Sglebius * 17142215Sglebius * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18142215Sglebius * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19142215Sglebius * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20142215Sglebius * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 21142215Sglebius * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22142215Sglebius * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23142215Sglebius * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24142215Sglebius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25142215Sglebius * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26142215Sglebius * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27142215Sglebius * THE POSSIBILITY OF SUCH DAMAGE. 28142215Sglebius */ 29142215Sglebius 30142215Sglebius#ifndef _IP_CARP_H 31142215Sglebius#define _IP_CARP_H 32142215Sglebius 33142215Sglebius/* 34142215Sglebius * The CARP header layout is as follows: 35142215Sglebius * 36142215Sglebius * 0 1 2 3 37142215Sglebius * 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 38142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 39142215Sglebius * |Version| Type | VirtualHostID | AdvSkew | Auth Len | 40142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 41142215Sglebius * | Reserved | AdvBase | Checksum | 42142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 43142215Sglebius * | Counter (1) | 44142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 45142215Sglebius * | Counter (2) | 46142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 47142215Sglebius * | SHA-1 HMAC (1) | 48142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 49142215Sglebius * | SHA-1 HMAC (2) | 50142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 51142215Sglebius * | SHA-1 HMAC (3) | 52142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 53142215Sglebius * | SHA-1 HMAC (4) | 54142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 55142215Sglebius * | SHA-1 HMAC (5) | 56142215Sglebius * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 57142215Sglebius * 58142215Sglebius */ 59142215Sglebius 60142215Sglebiusstruct carp_header { 61142215Sglebius#if BYTE_ORDER == LITTLE_ENDIAN 62142215Sglebius u_int8_t carp_type:4, 63142215Sglebius carp_version:4; 64142215Sglebius#endif 65142215Sglebius#if BYTE_ORDER == BIG_ENDIAN 66142215Sglebius u_int8_t carp_version:4, 67142215Sglebius carp_type:4; 68142215Sglebius#endif 69142215Sglebius u_int8_t carp_vhid; /* virtual host id */ 70142215Sglebius u_int8_t carp_advskew; /* advertisement skew */ 71142215Sglebius u_int8_t carp_authlen; /* size of counter+md, 32bit chunks */ 72142215Sglebius u_int8_t carp_pad1; /* reserved */ 73142215Sglebius u_int8_t carp_advbase; /* advertisement interval */ 74142215Sglebius u_int16_t carp_cksum; 75142215Sglebius u_int32_t carp_counter[2]; 76142215Sglebius unsigned char carp_md[20]; /* SHA1 HMAC */ 77142215Sglebius} __packed; 78142215Sglebius 79164808Simp#ifdef CTASSERT 80164808SimpCTASSERT(sizeof(struct carp_header) == 36); 81164808Simp#endif 82164808Simp 83142215Sglebius#define CARP_DFLTTL 255 84142215Sglebius 85142215Sglebius/* carp_version */ 86142215Sglebius#define CARP_VERSION 2 87142215Sglebius 88142215Sglebius/* carp_type */ 89142215Sglebius#define CARP_ADVERTISEMENT 0x01 90142215Sglebius 91142215Sglebius#define CARP_KEY_LEN 20 /* a sha1 hash of a passphrase */ 92142215Sglebius 93142215Sglebius/* carp_advbase */ 94142215Sglebius#define CARP_DFLTINTV 1 95142215Sglebius 96142215Sglebius/* 97142215Sglebius * Statistics. 98142215Sglebius */ 99142215Sglebiusstruct carpstats { 100142215Sglebius uint64_t carps_ipackets; /* total input packets, IPv4 */ 101142215Sglebius uint64_t carps_ipackets6; /* total input packets, IPv6 */ 102142215Sglebius uint64_t carps_badif; /* wrong interface */ 103142215Sglebius uint64_t carps_badttl; /* TTL is not CARP_DFLTTL */ 104142215Sglebius uint64_t carps_hdrops; /* packets shorter than hdr */ 105142215Sglebius uint64_t carps_badsum; /* bad checksum */ 106142215Sglebius uint64_t carps_badver; /* bad (incl unsupp) version */ 107142215Sglebius uint64_t carps_badlen; /* data length does not match */ 108142215Sglebius uint64_t carps_badauth; /* bad authentication */ 109142215Sglebius uint64_t carps_badvhid; /* bad VHID */ 110142215Sglebius uint64_t carps_badaddrs; /* bad address list */ 111142215Sglebius 112142215Sglebius uint64_t carps_opackets; /* total output packets, IPv4 */ 113142215Sglebius uint64_t carps_opackets6; /* total output packets, IPv6 */ 114142215Sglebius uint64_t carps_onomem; /* no memory for an mbuf */ 115142215Sglebius uint64_t carps_ostates; /* total state updates sent */ 116142215Sglebius 117142215Sglebius uint64_t carps_preempt; /* if enabled, preemptions */ 118142215Sglebius}; 119142215Sglebius 120142215Sglebius/* 121142215Sglebius * Configuration structure for SIOCSVH SIOCGVH 122142215Sglebius */ 123142215Sglebiusstruct carpreq { 124228571Sglebius int carpr_count; 125228571Sglebius int carpr_vhid; 126228571Sglebius#define CARP_MAXVHID 255 127142215Sglebius int carpr_state; 128142215Sglebius#define CARP_STATES "INIT", "BACKUP", "MASTER" 129142215Sglebius#define CARP_MAXSTATE 2 130142215Sglebius int carpr_advskew; 131228736Sglebius#define CARP_MAXSKEW 240 132142215Sglebius int carpr_advbase; 133142215Sglebius unsigned char carpr_key[CARP_KEY_LEN]; 134142215Sglebius}; 135142215Sglebius#define SIOCSVH _IOWR('i', 245, struct ifreq) 136142215Sglebius#define SIOCGVH _IOWR('i', 246, struct ifreq) 137142215Sglebius 138142215Sglebius#ifdef _KERNEL 139228571Sglebiusint carp_ioctl(struct ifreq *, u_long, struct thread *); 140228571Sglebiusint carp_attach(struct ifaddr *, int); 141338081Sloosvoid carp_detach(struct ifaddr *, bool); 142228571Sglebiusvoid carp_carpdev_state(struct ifnet *); 143269699Skevloint carp_input(struct mbuf **, int *, int); 144228571Sglebiusint carp6_input (struct mbuf **, int *, int); 145249925Sglebiusint carp_output (struct ifnet *, struct mbuf *, 146249925Sglebius const struct sockaddr *); 147246659Sglebiusint carp_master(struct ifaddr *); 148228571Sglebiusint carp_iamatch(struct ifaddr *, uint8_t **); 149211157Swillstruct ifaddr *carp_iamatch6(struct ifnet *, struct in6_addr *); 150211157Swillcaddr_t carp_macmatch6(struct ifnet *, struct mbuf *, const struct in6_addr *); 151228571Sglebiusint carp_forus(struct ifnet *, u_char *); 152211193Swill 153211193Swill/* These are external networking stack hooks for CARP */ 154211193Swill/* net/if.c */ 155228571Sglebiusextern int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 156228571Sglebiusextern int (*carp_attach_p)(struct ifaddr *, int); 157338081Sloosextern void (*carp_detach_p)(struct ifaddr *, bool); 158211193Swillextern void (*carp_linkstate_p)(struct ifnet *); 159228736Sglebiusextern void (*carp_demote_adj_p)(int, char *); 160246659Sglebiusextern int (*carp_master_p)(struct ifaddr *); 161211193Swill/* net/if_bridge.c net/if_ethersubr.c */ 162228571Sglebiusextern int (*carp_forus_p)(struct ifnet *, u_char *); 163211193Swill/* net/if_ethersubr.c */ 164211193Swillextern int (*carp_output_p)(struct ifnet *, struct mbuf *, 165249925Sglebius const struct sockaddr *); 166228571Sglebius/* net/rtsock.c */ 167228571Sglebiusextern int (*carp_get_vhid_p)(struct ifaddr *); 168211193Swill#ifdef INET 169211193Swill/* netinet/if_ether.c */ 170228571Sglebiusextern int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 171142215Sglebius#endif 172211193Swill#ifdef INET6 173211193Swill/* netinet6/nd6_nbr.c */ 174211193Swillextern struct ifaddr *(*carp_iamatch6_p)(struct ifnet *, struct in6_addr *); 175211193Swillextern caddr_t (*carp_macmatch6_p)(struct ifnet *, struct mbuf *, 176211193Swill const struct in6_addr *); 177211193Swill#endif 178211193Swill#endif 179142215Sglebius#endif /* _IP_CARP_H */ 180