Fix a couple of NULL dereferences in error paths.
[dragonfly.git] / sys / netinet / ip_carp.h
blobe4a44fbd9515758198690a379a2cf4440459d13f
1 /*
2 * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
3 * Copyright (c) 2003 Ryan McBride. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
23 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24 * THE POSSIBILITY OF SUCH DAMAGE.
27 * $FreeBSD: src/sys/netinet/ip_carp.h,v 1.3 2006/12/01 18:37:41 imp Exp $
28 * $OpenBSD: ip_carp.h,v 1.8 2004/07/29 22:12:15 mcbride Exp $
29 * $DragonFly: src/sys/netinet/ip_carp.h,v 1.1 2007/08/16 20:03:57 dillon Exp $
33 #ifndef _IP_CARP_H
34 #define _IP_CARP_H
36 #include <sys/ioccom.h>
39 * The CARP header layout is as follows:
41 * 0 1 2 3
42 * 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
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * |Version| Type | VirtualHostID | AdvSkew | Auth Len |
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Reserved | AdvBase | Checksum |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | Counter (1) |
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * | Counter (2) |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * | SHA-1 HMAC (1) |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * | SHA-1 HMAC (2) |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | SHA-1 HMAC (3) |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * | SHA-1 HMAC (4) |
59 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
60 * | SHA-1 HMAC (5) |
61 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
65 struct carp_header {
66 #if BYTE_ORDER == LITTLE_ENDIAN
67 uint8_t carp_type:4,
68 carp_version:4;
69 #endif
70 #if BYTE_ORDER == BIG_ENDIAN
71 uint8_t carp_version:4,
72 carp_type:4;
73 #endif
74 uint8_t carp_vhid; /* virtual host id */
75 uint8_t carp_advskew; /* advertisement skew */
76 uint8_t carp_authlen; /* size of counter+md, 32bit chunks */
77 uint8_t carp_pad1; /* reserved */
78 uint8_t carp_advbase; /* advertisement interval */
79 uint16_t carp_cksum;
80 uint32_t carp_counter[2];
81 unsigned char carp_md[20]; /* SHA1 HMAC */
82 } __packed;
84 #ifdef CTASSERT
85 CTASSERT(sizeof(struct carp_header) == 36);
86 #endif
88 #define CARP_DFLTTL 255
90 /* carp_version */
91 #define CARP_VERSION 2
93 /* carp_type */
94 #define CARP_ADVERTISEMENT 0x01
96 #define CARP_KEY_LEN 20 /* a sha1 hash of a passphrase */
98 /* carp_advbase */
99 #define CARP_DFLTINTV 1
102 * Statistics.
104 struct carpstats {
105 uint64_t carps_ipackets; /* total input packets, IPv4 */
106 uint64_t carps_ipackets6; /* total input packets, IPv6 */
107 uint64_t carps_badif; /* wrong interface */
108 uint64_t carps_badttl; /* TTL is not CARP_DFLTTL */
109 uint64_t carps_hdrops; /* packets shorter than hdr */
110 uint64_t carps_badsum; /* bad checksum */
111 uint64_t carps_badver; /* bad (incl unsupp) version */
112 uint64_t carps_badlen; /* data length does not match */
113 uint64_t carps_badauth; /* bad authentication */
114 uint64_t carps_badvhid; /* bad VHID */
115 uint64_t carps_badaddrs; /* bad address list */
117 uint64_t carps_opackets; /* total output packets, IPv4 */
118 uint64_t carps_opackets6; /* total output packets, IPv6 */
119 uint64_t carps_onomem; /* no memory for an mbuf */
120 uint64_t carps_ostates; /* total state updates sent */
122 uint64_t carps_preempt; /* if enabled, preemptions */
126 * Configuration structure for SIOCSVH SIOCGVH
128 struct carpreq {
129 int carpr_state;
130 #define CARP_STATES "INIT", "BACKUP", "MASTER"
131 #define CARP_MAXSTATE 2
132 int carpr_vhid;
133 int carpr_advskew;
134 int carpr_advbase;
135 unsigned char carpr_key[CARP_KEY_LEN];
137 #define SIOCSVH _IOWR('i', 245, struct ifreq)
138 #define SIOCGVH _IOWR('i', 246, struct ifreq)
141 struct ifcarpvhaddr {
142 uint32_t carpa_flags; /* CARP_VHAF_ */
143 struct sockaddr_in carpa_addr; /* carp address */
144 struct sockaddr_in carpa_baddr; /* backing address */
146 #define CARP_VHAF_OWNER 0x1
147 #define CARP_VHAF_ONLIST 0x2
149 #define CARPGDEVNAME 0 /* SIOCGDRVSPEC char[IFNAMSIZ] */
150 #define CARPGVHADDR 1 /* SIOCGDRVSPEC ifcarpvhaddr array */
153 * Names for CARP sysctl objects
155 #define CARPCTL_ALLOW 1 /* accept incoming CARP packets */
156 #define CARPCTL_PREEMPT 2 /* high-pri backup preemption mode */
157 #define CARPCTL_LOG 3 /* log bad packets */
158 #define CARPCTL_STATS 4 /* statistics (read-only) */
159 #define CARPCTL_ARPBALANCE 5 /* balance arp responses */
160 #define CARPCTL_SETROUTE 6 /* change routes */
161 #define CARPCTL_MAXID 7
163 #define CARPCTL_NAMES { \
164 { 0, 0 }, \
165 { "allow", CTLTYPE_INT }, \
166 { "preempt", CTLTYPE_INT }, \
167 { "log", CTLTYPE_INT }, \
168 { "stats", CTLTYPE_STRUCT }, \
169 { "arpbalance", CTLTYPE_INT }, \
170 { "setroute", CTLTYPE_INT }, \
173 #ifdef _KERNEL
174 void carp_group_demote_adj(struct ifnet *, int);
175 int carp_proto_input(struct mbuf **, int *, int);
176 int carp6_proto_input(struct mbuf **, int *, int);
177 void carp_proto_ctlinput(netmsg_t);
178 int carp_iamatch(const struct in_ifaddr *);
179 struct ifaddr *carp_iamatch6(void *, struct in6_addr *);
180 void *carp_macmatch6(void *, struct mbuf *, const struct in6_addr *);
181 struct mbuf *carp_input(void *, struct mbuf *);
182 struct ifnet *carp_parent(struct ifnet *);
183 #endif /* _KERNEL */
185 #endif /* _IP_CARP_H */