dhcpcd: Move any existing files out of the dhcp chroot.
[dragonfly.git] / sys / netinet / in_var.h
blob906fdd1a655c825496aed990f0fab2c19c7f479a
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
29 * @(#)in_var.h 8.2 (Berkeley) 1/9/95
30 * $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.3 2001/12/14 20:09:34 jlemon Exp $
33 #ifndef _NETINET_IN_VAR_H_
34 #define _NETINET_IN_VAR_H_
36 #ifndef _SYS_QUEUE_H_
37 #include <sys/queue.h>
38 #endif
39 #ifndef _NET_IF_VAR_H_
40 #include <net/if_var.h>
41 #endif
42 #ifndef _NETINET_IN_H_
43 #include <netinet/in.h>
44 #endif
47 * Interface address, Internet version. One of these structures
48 * is allocated for each Internet address on an interface.
49 * The ifaddr structure contains the protocol-independent part
50 * of the structure and is assumed to be first.
52 struct in_ifaddr {
53 struct ifaddr ia_ifa; /* protocol-independent info */
54 #define ia_ifp ia_ifa.ifa_ifp
55 #define ia_flags ia_ifa.ifa_flags
56 /* ia_{,sub}net{,mask} in host order */
57 u_long ia_net; /* network number of interface */
58 u_long ia_netmask; /* mask of net part */
59 u_long ia_subnet; /* subnet number, including net */
60 u_long ia_subnetmask; /* mask of subnet part */
61 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
62 void *ia_pad1[2];
63 void *ia_pad2[2];
64 struct sockaddr_in ia_addr; /* reserve space for interface name */
65 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
66 #define ia_broadaddr ia_dstaddr
67 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
70 struct in_aliasreq {
71 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
72 struct sockaddr_in ifra_addr;
73 struct sockaddr_in ifra_broadaddr;
74 #define ifra_dstaddr ifra_broadaddr
75 struct sockaddr_in ifra_mask;
78 * Given a pointer to an in_ifaddr (ifaddr),
79 * return a pointer to the addr as a sockaddr_in.
81 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
82 #if 0
83 #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
85 #define IN_LNAOF(in, ifa) \
86 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
87 #endif
90 #ifdef _KERNEL
91 #include <sys/fnv_hash.h>
93 struct in_ifaddr_container;
95 extern struct in_addr zeroin_addr;
96 extern u_char inetctlerrmap[];
99 * Hash table for IP addresses.
101 extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr_container) *in_ifaddrhashtbls[];
102 extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr_container) in_ifaddrheads[];
103 extern u_long in_ifaddrhmask; /* mask for hash table */
105 #define INADDR_NHASH_LOG2 9
106 #define INADDR_NHASH (1 << INADDR_NHASH_LOG2)
107 #define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT)
108 #define INADDR_HASH(x) \
109 (&in_ifaddrhashtbls[mycpuid][INADDR_HASHVAL(x) & in_ifaddrhmask])
113 * Function for finding the interface (ifnet structure) corresponding to one
114 * of our IP addresses.
116 static __inline struct ifnet *
117 INADDR_TO_IFP(const struct in_addr *_addr)
119 struct in_ifaddr_container *_iac;
121 LIST_FOREACH(_iac, INADDR_HASH(_addr->s_addr), ia_hash) {
122 if (IA_SIN(_iac->ia)->sin_addr.s_addr == _addr->s_addr)
123 return _iac->ia->ia_ifp;
125 return NULL;
129 * Function for finding the internet address structure (in_ifaddr) corresponding
130 * to a given interface (ifnet structure).
132 static __inline struct in_ifaddr *
133 IFP_TO_IA(const struct ifnet *_ifp)
135 struct in_ifaddr_container *_iac;
137 TAILQ_FOREACH(_iac, &in_ifaddrheads[mycpuid], ia_link)
138 if (_iac->ia->ia_ifp == _ifp)
139 return _iac->ia;
140 return NULL;
143 #endif /* _KERNEL */
145 #ifdef _KERNEL
147 * This information should be part of the ifnet structure but we don't wish
148 * to change that - as it might break a number of things
151 struct router_info {
152 struct ifnet *rti_ifp;
153 int rti_type; /* type of router which is querier on this interface */
154 int rti_time; /* # of slow timeouts since last old query */
155 struct router_info *rti_next;
159 * Internet multicast address structure. There is one of these for each IP
160 * multicast group to which this host belongs on a given network interface.
161 * For every entry on the interface's if_multiaddrs list which represents
162 * an IP multicast group, there is one of these structures. They are also
163 * kept on a system-wide list to make it easier to keep our legacy IGMP code
164 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
166 struct in_multi {
167 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
168 struct in_addr inm_addr; /* IP multicast address, convenience */
169 struct ifnet *inm_ifp; /* back pointer to ifnet */
170 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
171 u_int inm_timer; /* IGMP membership report timer */
172 u_int inm_state; /* state of the membership */
173 struct router_info *inm_rti; /* router info*/
175 #endif /* _KERNEL */
177 #ifdef _KERNEL
179 #ifdef SYSCTL_DECL
180 SYSCTL_DECL(_net_inet_ip);
181 SYSCTL_DECL(_net_inet_raw);
182 #endif
184 extern LIST_HEAD(in_multihead, in_multi) in_multihead;
187 * Structure used by macros below to remember position when stepping through
188 * all of the in_multi records.
190 struct in_multistep {
191 struct in_multi *i_inm;
195 * Look up the in_multi record for a given IP multicast address on a given
196 * interface. If no matching record is found, NULL is returned.
198 static __inline struct in_multi *
199 IN_LOOKUP_MULTI(const struct in_addr *_addr, struct ifnet *_ifp)
201 const struct ifmultiaddr *_ifma;
202 struct in_multi *_inm = NULL;
204 if (_ifp == NULL)
205 return NULL;
207 /* TODO: need ifnet_serialize_main */
208 ifnet_serialize_all(_ifp);
209 TAILQ_FOREACH(_ifma, &_ifp->if_multiaddrs, ifma_link) {
210 if (_ifma->ifma_addr->sa_family == AF_INET &&
211 ((struct sockaddr_in *)_ifma->ifma_addr)->sin_addr.s_addr ==
212 _addr->s_addr) {
213 _inm = _ifma->ifma_protospec;
214 break;
217 ifnet_deserialize_all(_ifp);
219 return _inm;
223 * Macro to step through all of the in_multi records, one at a time.
224 * The current position is remembered in "step", which the caller must
225 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
226 * and get the first record. Both macros return a NULL "inm" when there
227 * are no remaining records.
229 #define IN_NEXT_MULTI(step, inm) \
230 /* struct in_multistep step; */ \
231 /* struct in_multi *inm; */ \
232 do { \
233 if (((inm) = (step).i_inm) != NULL) \
234 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
235 } while(0)
237 #define IN_FIRST_MULTI(step, inm) \
238 /* struct in_multistep step; */ \
239 /* struct in_multi *inm; */ \
240 do { \
241 (step).i_inm = LIST_FIRST(&in_multihead); \
242 IN_NEXT_MULTI((step), (inm)); \
243 } while(0)
245 struct route;
246 struct lwkt_serialize;
247 union netmsg;
249 void in_ifdetach(struct ifnet *ifp);
250 void in_if_down(struct ifnet *ifp);
251 struct in_multi *in_addmulti (struct in_addr *, struct ifnet *);
252 void in_delmulti (struct in_multi *);
253 int in_control (u_long, caddr_t, struct ifnet *, struct thread *);
254 void in_control_dispatch(union netmsg *);
255 void in_rtqdrain (void);
256 void ip_input (struct mbuf *);
257 void ip_forward (struct mbuf *, boolean_t, struct sockaddr_in *);
258 int in_ifadown (struct ifaddr *ifa, int);
259 int in_ifadown_force (struct ifaddr *ifa, int);
260 void in_ifscrub (struct ifnet *, struct in_ifaddr *);
261 void in_iaunlink (struct in_ifaddr *);
262 void in_iahash_insert (struct in_ifaddr *);
263 void in_iahash_remove (struct in_ifaddr *);
265 #endif /* _KERNEL */
267 /* INET6 stuff */
268 #include <netinet6/in6_var.h>
270 #endif /* _NETINET_IN_VAR_H_ */