Make all network interrupt service routines MPSAFE part 1/3.
[dragonfly.git] / sys / netinet / in_var.h
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1/*
2 * Copyright (c) 1985, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
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.
20 *
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.
32 *
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 $
78195a76 35 * $DragonFly: src/sys/netinet/in_var.h,v 1.10 2005/11/28 17:13:46 dillon Exp $
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36 */
37
38#ifndef _NETINET_IN_VAR_H_
39#define _NETINET_IN_VAR_H_
40
41#include <sys/queue.h>
42#include <sys/fnv_hash.h>
43
44/*
45 * Interface address, Internet version. One of these structures
46 * is allocated for each Internet address on an interface.
47 * The ifaddr structure contains the protocol-independent part
48 * of the structure and is assumed to be first.
49 */
50struct in_ifaddr {
51 struct ifaddr ia_ifa; /* protocol-independent info */
52#define ia_ifp ia_ifa.ifa_ifp
53#define ia_flags ia_ifa.ifa_flags
54 /* ia_{,sub}net{,mask} in host order */
55 u_long ia_net; /* network number of interface */
56 u_long ia_netmask; /* mask of net part */
57 u_long ia_subnet; /* subnet number, including net */
58 u_long ia_subnetmask; /* mask of subnet part */
59 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */
60 LIST_ENTRY(in_ifaddr) ia_hash; /* entry in bucket of inet addresses */
61 TAILQ_ENTRY(in_ifaddr) ia_link; /* list of internet addresses */
62 struct sockaddr_in ia_addr; /* reserve space for interface name */
63 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */
64#define ia_broadaddr ia_dstaddr
65 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */
66};
67
68struct in_aliasreq {
69 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
70 struct sockaddr_in ifra_addr;
71 struct sockaddr_in ifra_broadaddr;
72#define ifra_dstaddr ifra_broadaddr
73 struct sockaddr_in ifra_mask;
74};
75/*
76 * Given a pointer to an in_ifaddr (ifaddr),
77 * return a pointer to the addr as a sockaddr_in.
78 */
79#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
80#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr))
81
82#define IN_LNAOF(in, ifa) \
83 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask))
84
85
86#ifdef _KERNEL
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87extern struct in_addr zeroin_addr;
88extern u_char inetctlerrmap[];
89
f23061d4 90/*
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91 * Hash table for IP addresses.
92 */
93extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr) *in_ifaddrhashtbl;
94extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead;
95extern u_long in_ifaddrhmask; /* mask for hash table */
96
97#define INADDR_NHASH_LOG2 9
98#define INADDR_NHASH (1 << INADDR_NHASH_LOG2)
99#define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT)
100#define INADDR_HASH(x) \
101 (&in_ifaddrhashtbl[INADDR_HASHVAL(x) & in_ifaddrhmask])
102
103
104/*
105 * Macro for finding the interface (ifnet structure) corresponding to one
106 * of our IP addresses.
107 */
108#define INADDR_TO_IFP(addr, ifp) \
109 /* struct in_addr addr; */ \
110 /* struct ifnet *ifp; */ \
111{ \
112 struct in_ifaddr *ia; \
113\
114 LIST_FOREACH(ia, INADDR_HASH((addr).s_addr), ia_hash) \
115 if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \
116 break; \
117 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
118}
119
120/*
121 * Macro for finding the internet address structure (in_ifaddr) corresponding
122 * to a given interface (ifnet structure).
123 */
124#define IFP_TO_IA(ifp, ia) \
125 /* struct ifnet *ifp; */ \
126 /* struct in_ifaddr *ia; */ \
127{ \
128 for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \
129 (ia) != NULL && (ia)->ia_ifp != (ifp); \
130 (ia) = TAILQ_NEXT((ia), ia_link)) \
131 continue; \
132}
133#endif
134
135/*
136 * This information should be part of the ifnet structure but we don't wish
137 * to change that - as it might break a number of things
138 */
139
140struct router_info {
141 struct ifnet *rti_ifp;
142 int rti_type; /* type of router which is querier on this interface */
143 int rti_time; /* # of slow timeouts since last old query */
144 struct router_info *rti_next;
145};
146
147/*
148 * Internet multicast address structure. There is one of these for each IP
149 * multicast group to which this host belongs on a given network interface.
150 * For every entry on the interface's if_multiaddrs list which represents
151 * an IP multicast group, there is one of these structures. They are also
152 * kept on a system-wide list to make it easier to keep our legacy IGMP code
153 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below).
154 */
155struct in_multi {
156 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */
157 struct in_addr inm_addr; /* IP multicast address, convenience */
158 struct ifnet *inm_ifp; /* back pointer to ifnet */
159 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */
160 u_int inm_timer; /* IGMP membership report timer */
161 u_int inm_state; /* state of the membership */
162 struct router_info *inm_rti; /* router info*/
163};
164
165#ifdef _KERNEL
166
167#ifdef SYSCTL_DECL
168SYSCTL_DECL(_net_inet_ip);
169SYSCTL_DECL(_net_inet_raw);
170#endif
171
172extern LIST_HEAD(in_multihead, in_multi) in_multihead;
173
174/*
175 * Structure used by macros below to remember position when stepping through
176 * all of the in_multi records.
177 */
178struct in_multistep {
179 struct in_multi *i_inm;
180};
181
182/*
183 * Macro for looking up the in_multi record for a given IP multicast address
184 * on a given interface. If no matching record is found, "inm" is set null.
185 */
186#define IN_LOOKUP_MULTI(addr, ifp, inm) \
187 /* struct in_addr addr; */ \
188 /* struct ifnet *ifp; */ \
189 /* struct in_multi *inm; */ \
190do { \
191 struct ifmultiaddr *ifma; \
192\
193 LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \
194 if (ifma->ifma_addr->sa_family == AF_INET \
195 && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \
196 (addr).s_addr) \
197 break; \
198 } \
199 (inm) = ifma ? ifma->ifma_protospec : 0; \
200} while(0)
201
202/*
203 * Macro to step through all of the in_multi records, one at a time.
204 * The current position is remembered in "step", which the caller must
205 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step"
206 * and get the first record. Both macros return a NULL "inm" when there
207 * are no remaining records.
208 */
209#define IN_NEXT_MULTI(step, inm) \
210 /* struct in_multistep step; */ \
211 /* struct in_multi *inm; */ \
212do { \
213 if (((inm) = (step).i_inm) != NULL) \
214 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \
215} while(0)
216
217#define IN_FIRST_MULTI(step, inm) \
218 /* struct in_multistep step; */ \
219 /* struct in_multi *inm; */ \
220do { \
221 (step).i_inm = LIST_FIRST(&in_multihead); \
222 IN_NEXT_MULTI((step), (inm)); \
223} while(0)
224
225struct route;
9eeaa8a9 226struct netmsg;
78195a76 227struct lwkt_serialize;
9eeaa8a9 228
a98eb818 229void in_ifdetach(struct ifnet *ifp);
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230struct in_multi *in_addmulti (struct in_addr *, struct ifnet *);
231void in_delmulti (struct in_multi *);
232int in_control (struct socket *, u_long, caddr_t, struct ifnet *,
233 struct thread *);
234void in_rtqdrain (void);
4f277347 235void ip_input (struct mbuf *);
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236int in_ifadown (struct ifaddr *ifa, int);
237void in_ifscrub (struct ifnet *, struct in_ifaddr *);
78195a76 238int ipflow_fastforward (struct mbuf *, struct lwkt_serialize *);
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239void ipflow_create (const struct route *, struct mbuf *);
240void ipflow_slowtimo (void);
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241
242#endif /* _KERNEL */
243
244/* INET6 stuff */
245#include <netinet6/in6_var.h>
246
247#endif /* _NETINET_IN_VAR_H_ */