HAMMER 60I/Many: Mirroring
[dragonfly.git] / sys / netinet / in_var.h
blob96b0091d0417adc9d2ffad1fe2d5e3914b98bca2
1 /*
2 * Copyright (c) 1985, 1986, 1993
3 * The Regents of the University of California. 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.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#)in_var.h 8.2 (Berkeley) 1/9/95
34 * $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.3 2001/12/14 20:09:34 jlemon Exp $
35 * $DragonFly: src/sys/netinet/in_var.h,v 1.14 2008/07/03 08:22:36 corecode Exp $
38 #ifndef _NETINET_IN_VAR_H_
39 #define _NETINET_IN_VAR_H_
41 #ifndef _SYS_QUEUE_H_
42 #include <sys/queue.h>
43 #endif
44 #ifndef _SYS_FNV_HASH_H_
45 #include <sys/fnv_hash.h>
46 #endif
47 #ifndef _NET_IF_VAR_H_
48 #include <net/if_var.h>
49 #endif
50 #ifndef _NETINET_IN_H_
51 #include <netinet/in.h>
52 #endif
55 * Interface address, Internet version. One of these structures
56 * is allocated for each Internet address on an interface.
57 * The ifaddr structure contains the protocol-independent part
58 * of the structure and is assumed to be first.
60 struct in_ifaddr {
61 struct ifaddr ia_ifa; /* protocol-independent info */
62 #define ia_ifp ia_ifa.ifa_ifp
63 #define ia_flags ia_ifa.ifa_flags
64 /* ia_{,sub}net{,mask} in host order */
65 u_long ia_net; /* network number of interface */
66 u_long ia_netmask; /* mask of net part */
67 u_long ia_subnet; /* subnet number, including net */
68 u_long ia_subnetmask; /* mask of subnet part */
69 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
70 void *ia_pad1[2];
71 void *ia_pad2[2];
72 struct sockaddr_in ia_addr; /* reserve space for interface name */
73 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
74 #define ia_broadaddr ia_dstaddr
75 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
78 struct in_aliasreq {
79 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
80 struct sockaddr_in ifra_addr;
81 struct sockaddr_in ifra_broadaddr;
82 #define ifra_dstaddr ifra_broadaddr
83 struct sockaddr_in ifra_mask;
86 * Given a pointer to an in_ifaddr (ifaddr),
87 * return a pointer to the addr as a sockaddr_in.
89 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
90 #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
92 #define IN_LNAOF(in, ifa) \
93 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
96 #ifdef _KERNEL
97 struct in_ifaddr_container;
99 extern struct in_addr zeroin_addr;
100 extern u_char inetctlerrmap[];
103 * Hash table for IP addresses.
105 extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr_container) *in_ifaddrhashtbls[];
106 extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr_container) in_ifaddrheads[];
107 extern u_long in_ifaddrhmask; /* mask for hash table */
109 #define INADDR_NHASH_LOG2 9
110 #define INADDR_NHASH (1 << INADDR_NHASH_LOG2)
111 #define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT)
112 #define INADDR_HASH(x) \
113 (&in_ifaddrhashtbls[mycpuid][INADDR_HASHVAL(x) & in_ifaddrhmask])
117 * Function for finding the interface (ifnet structure) corresponding to one
118 * of our IP addresses.
120 static __inline struct ifnet *
121 INADDR_TO_IFP(const struct in_addr *_addr)
123 struct in_ifaddr_container *_iac;
125 LIST_FOREACH(_iac, INADDR_HASH(_addr->s_addr), ia_hash) {
126 if (IA_SIN(_iac->ia)->sin_addr.s_addr == _addr->s_addr)
127 return _iac->ia->ia_ifp;
129 return NULL;
133 * Function for finding the internet address structure (in_ifaddr) corresponding
134 * to a given interface (ifnet structure).
136 static __inline struct in_ifaddr *
137 IFP_TO_IA(const struct ifnet *_ifp)
139 struct in_ifaddr_container *_iac;
141 TAILQ_FOREACH(_iac, &in_ifaddrheads[mycpuid], ia_link)
142 if (_iac->ia->ia_ifp == _ifp)
143 return _iac->ia;
144 return NULL;
147 #endif /* _KERNEL */
150 * This information should be part of the ifnet structure but we don't wish
151 * to change that - as it might break a number of things
154 struct router_info {
155 struct ifnet *rti_ifp;
156 int rti_type; /* type of router which is querier on this interface */
157 int rti_time; /* # of slow timeouts since last old query */
158 struct router_info *rti_next;
162 * Internet multicast address structure. There is one of these for each IP
163 * multicast group to which this host belongs on a given network interface.
164 * For every entry on the interface's if_multiaddrs list which represents
165 * an IP multicast group, there is one of these structures. They are also
166 * kept on a system-wide list to make it easier to keep our legacy IGMP code
167 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
169 struct in_multi {
170 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
171 struct in_addr inm_addr; /* IP multicast address, convenience */
172 struct ifnet *inm_ifp; /* back pointer to ifnet */
173 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
174 u_int inm_timer; /* IGMP membership report timer */
175 u_int inm_state; /* state of the membership */
176 struct router_info *inm_rti; /* router info*/
179 #ifdef _KERNEL
181 #ifdef SYSCTL_DECL
182 SYSCTL_DECL(_net_inet_ip);
183 SYSCTL_DECL(_net_inet_raw);
184 #endif
186 extern LIST_HEAD(in_multihead, in_multi) in_multihead;
189 * Structure used by macros below to remember position when stepping through
190 * all of the in_multi records.
192 struct in_multistep {
193 struct in_multi *i_inm;
197 * Macro for looking up the in_multi record for a given IP multicast address
198 * on a given interface. If no matching record is found, "inm" is set null.
200 #define IN_LOOKUP_MULTI(addr, ifp, inm) \
201 /* struct in_addr addr; */ \
202 /* struct ifnet *ifp; */ \
203 /* struct in_multi *inm; */ \
204 do { \
205 struct ifmultiaddr *ifma; \
207 LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
208 if (ifma->ifma_addr->sa_family == AF_INET \
209 && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
210 (addr).s_addr) \
211 break; \
213 (inm) = ifma ? ifma->ifma_protospec : 0; \
214 } while(0)
217 * Macro to step through all of the in_multi records, one at a time.
218 * The current position is remembered in "step", which the caller must
219 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
220 * and get the first record. Both macros return a NULL "inm" when there
221 * are no remaining records.
223 #define IN_NEXT_MULTI(step, inm) \
224 /* struct in_multistep step; */ \
225 /* struct in_multi *inm; */ \
226 do { \
227 if (((inm) = (step).i_inm) != NULL) \
228 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
229 } while(0)
231 #define IN_FIRST_MULTI(step, inm) \
232 /* struct in_multistep step; */ \
233 /* struct in_multi *inm; */ \
234 do { \
235 (step).i_inm = LIST_FIRST(&in_multihead); \
236 IN_NEXT_MULTI((step), (inm)); \
237 } while(0)
239 struct route;
240 struct netmsg;
241 struct lwkt_serialize;
243 void in_ifdetach(struct ifnet *ifp);
244 struct in_multi *in_addmulti (struct in_addr *, struct ifnet *);
245 void in_delmulti (struct in_multi *);
246 int in_control (struct socket *, u_long, caddr_t, struct ifnet *,
247 struct thread *);
248 void in_rtqdrain (void);
249 void ip_input (struct mbuf *);
250 void ip_forward (struct mbuf *, boolean_t, struct sockaddr_in *);
251 int in_ifadown (struct ifaddr *ifa, int);
252 void in_ifscrub (struct ifnet *, struct in_ifaddr *);
253 void in_iaunlink (struct in_ifaddr *);
254 void in_iahash_insert (struct in_ifaddr *);
255 void in_iahash_remove (struct in_ifaddr *);
256 int ipflow_fastforward (struct mbuf *, struct lwkt_serialize *);
257 void ipflow_create (const struct route *, struct mbuf *);
258 void ipflow_slowtimo (void);
260 #endif /* _KERNEL */
262 /* INET6 stuff */
263 #include <netinet6/in6_var.h>
265 #endif /* _NETINET_IN_VAR_H_ */