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in_var.h revision 1.65.32.1
      1  1.65.32.1       tls /*	$NetBSD: in_var.h,v 1.65.32.1 2014/08/10 06:56:25 tls Exp $	*/
      2        1.8       cgd 
      3       1.32   thorpej /*-
      4       1.32   thorpej  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5       1.32   thorpej  * All rights reserved.
      6       1.32   thorpej  *
      7       1.32   thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8       1.32   thorpej  * by Public Access Networks Corporation ("Panix").  It was developed under
      9       1.32   thorpej  * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon.
     10       1.32   thorpej  *
     11       1.32   thorpej  * Redistribution and use in source and binary forms, with or without
     12       1.32   thorpej  * modification, are permitted provided that the following conditions
     13       1.32   thorpej  * are met:
     14       1.32   thorpej  * 1. Redistributions of source code must retain the above copyright
     15       1.32   thorpej  *    notice, this list of conditions and the following disclaimer.
     16       1.32   thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     17       1.32   thorpej  *    notice, this list of conditions and the following disclaimer in the
     18       1.32   thorpej  *    documentation and/or other materials provided with the distribution.
     19       1.32   thorpej  *
     20       1.32   thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21       1.32   thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22       1.32   thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23       1.32   thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24       1.32   thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25       1.32   thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26       1.32   thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27       1.32   thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28       1.32   thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29       1.32   thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30       1.32   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     31       1.32   thorpej  */
     32       1.32   thorpej 
     33        1.1       cgd /*
     34        1.7   mycroft  * Copyright (c) 1985, 1986, 1993
     35        1.7   mycroft  *	The Regents of the University of California.  All rights reserved.
     36        1.1       cgd  *
     37        1.1       cgd  * Redistribution and use in source and binary forms, with or without
     38        1.1       cgd  * modification, are permitted provided that the following conditions
     39        1.1       cgd  * are met:
     40        1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     41        1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     42        1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     43        1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     44        1.1       cgd  *    documentation and/or other materials provided with the distribution.
     45       1.48       agc  * 3. Neither the name of the University nor the names of its contributors
     46        1.1       cgd  *    may be used to endorse or promote products derived from this software
     47        1.1       cgd  *    without specific prior written permission.
     48        1.1       cgd  *
     49        1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     50        1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     51        1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     52        1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     53        1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     54        1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     55        1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     56        1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     57        1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     58        1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     59        1.1       cgd  * SUCH DAMAGE.
     60        1.1       cgd  *
     61       1.19   thorpej  *	@(#)in_var.h	8.2 (Berkeley) 1/9/95
     62        1.1       cgd  */
     63        1.1       cgd 
     64       1.20     perry #ifndef _NETINET_IN_VAR_H_
     65       1.20     perry #define _NETINET_IN_VAR_H_
     66       1.20     perry 
     67       1.15   mycroft #include <sys/queue.h>
     68       1.15   mycroft 
     69        1.1       cgd /*
     70        1.1       cgd  * Interface address, Internet version.  One of these structures
     71        1.1       cgd  * is allocated for each interface with an Internet address.
     72        1.1       cgd  * The ifaddr structure contains the protocol-independent part
     73        1.1       cgd  * of the structure and is assumed to be first.
     74        1.1       cgd  */
     75        1.1       cgd struct in_ifaddr {
     76        1.1       cgd 	struct	ifaddr ia_ifa;		/* protocol-independent info */
     77        1.1       cgd #define	ia_ifp		ia_ifa.ifa_ifp
     78        1.7   mycroft #define ia_flags	ia_ifa.ifa_flags
     79        1.1       cgd 					/* ia_{,sub}net{,mask} in host order */
     80       1.11       cgd 	u_int32_t ia_net;		/* network number of interface */
     81       1.11       cgd 	u_int32_t ia_netmask;		/* mask of net part */
     82       1.11       cgd 	u_int32_t ia_subnet;		/* subnet number, including net */
     83       1.11       cgd 	u_int32_t ia_subnetmask;	/* mask of subnet part */
     84        1.1       cgd 	struct	in_addr ia_netbroadcast; /* to recognize net broadcasts */
     85       1.21       tls 	LIST_ENTRY(in_ifaddr) ia_hash;	/* entry in bucket of inet addresses */
     86       1.15   mycroft 	TAILQ_ENTRY(in_ifaddr) ia_list;	/* list of internet addresses */
     87        1.1       cgd 	struct	sockaddr_in ia_addr;	/* reserve space for interface name */
     88       1.11       cgd 	struct	sockaddr_in ia_dstaddr;	/* reserve space for broadcast addr */
     89        1.1       cgd #define	ia_broadaddr	ia_dstaddr
     90        1.1       cgd 	struct	sockaddr_in ia_sockmask; /* reserve space for general netmask */
     91       1.15   mycroft 	LIST_HEAD(, in_multi) ia_multiaddrs; /* list of multicast addresses */
     92       1.41     enami 	struct	in_multi *ia_allhosts;	/* multicast address record for
     93       1.41     enami 					   the allhosts multicast group */
     94       1.61      matt 	uint16_t ia_idsalt;		/* ip_id salt for this ia */
     95        1.1       cgd };
     96        1.1       cgd 
     97        1.1       cgd struct	in_aliasreq {
     98        1.1       cgd 	char	ifra_name[IFNAMSIZ];		/* if name, e.g. "en0" */
     99        1.1       cgd 	struct	sockaddr_in ifra_addr;
    100       1.14   mycroft 	struct	sockaddr_in ifra_dstaddr;
    101       1.14   mycroft #define	ifra_broadaddr	ifra_dstaddr
    102        1.1       cgd 	struct	sockaddr_in ifra_mask;
    103        1.1       cgd };
    104        1.1       cgd /*
    105        1.1       cgd  * Given a pointer to an in_ifaddr (ifaddr),
    106        1.1       cgd  * return a pointer to the addr as a sockaddr_in.
    107        1.1       cgd  */
    108        1.1       cgd #define	IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr))
    109        1.1       cgd 
    110  1.65.32.1       tls #ifdef _KERNEL
    111        1.7   mycroft 
    112  1.65.32.1       tls /* Note: 61, 127, 251, 509, 1021, 2039 are good. */
    113       1.21       tls #ifndef IN_IFADDR_HASH_SIZE
    114  1.65.32.1       tls #define IN_IFADDR_HASH_SIZE	509
    115       1.45      matt #endif
    116       1.21       tls 
    117       1.28       tls /*
    118       1.28       tls  * This is a bit unconventional, and wastes a little bit of space, but
    119       1.28       tls  * because we want a very even hash function we don't use & in_ifaddrhash
    120       1.28       tls  * here, but rather % the hash size, which should obviously be prime.
    121       1.28       tls  */
    122       1.28       tls 
    123       1.28       tls #define	IN_IFADDR_HASH(x) in_ifaddrhashtbl[(u_long)(x) % IN_IFADDR_HASH_SIZE]
    124       1.21       tls 
    125       1.21       tls LIST_HEAD(in_ifaddrhashhead, in_ifaddr);	/* Type of the hash head */
    126       1.21       tls TAILQ_HEAD(in_ifaddrhead, in_ifaddr);		/* Type of the list head */
    127       1.21       tls 
    128       1.44      matt extern	u_long in_ifaddrhash;			/* size of hash table - 1 */
    129       1.21       tls extern  struct in_ifaddrhashhead *in_ifaddrhashtbl;	/* Hash table head */
    130       1.51  jonathan extern  struct in_ifaddrhead in_ifaddrhead;		/* List head (in ip_input) */
    131       1.21       tls 
    132       1.42      matt extern	const	int	inetctlerrmap[];
    133        1.7   mycroft 
    134        1.4   hpeyerl /*
    135       1.21       tls  * Macro for finding whether an internet address (in_addr) belongs to one
    136       1.21       tls  * of our interfaces (in_ifaddr).  NULL if the address isn't ours.
    137       1.21       tls  */
    138       1.21       tls #define INADDR_TO_IA(addr, ia) \
    139       1.21       tls 	/* struct in_addr addr; */ \
    140       1.21       tls 	/* struct in_ifaddr *ia; */ \
    141       1.21       tls { \
    142       1.43      matt 	LIST_FOREACH(ia, &IN_IFADDR_HASH((addr).s_addr), ia_hash) { \
    143       1.49    itojun 		if (in_hosteq(ia->ia_addr.sin_addr, (addr))) \
    144       1.34   thorpej 			break; \
    145       1.34   thorpej 	} \
    146       1.27        is }
    147       1.27        is 
    148       1.27        is /*
    149       1.27        is  * Macro for finding the next in_ifaddr structure with the same internet
    150       1.27        is  * address as ia. Call only with a valid ia pointer.
    151       1.27        is  * Will set ia to NULL if none found.
    152       1.27        is  */
    153       1.27        is 
    154       1.27        is #define NEXT_IA_WITH_SAME_ADDR(ia) \
    155       1.27        is 	/* struct in_ifaddr *ia; */ \
    156       1.27        is { \
    157       1.27        is 	struct in_addr addr; \
    158       1.27        is 	addr = ia->ia_addr.sin_addr; \
    159       1.27        is 	do { \
    160       1.43      matt 		ia = LIST_NEXT(ia, ia_hash); \
    161       1.30    scottr 	} while ((ia != NULL) && !in_hosteq(ia->ia_addr.sin_addr, addr)); \
    162       1.21       tls }
    163       1.21       tls 
    164       1.21       tls /*
    165        1.4   hpeyerl  * Macro for finding the interface (ifnet structure) corresponding to one
    166        1.4   hpeyerl  * of our IP addresses.
    167        1.4   hpeyerl  */
    168        1.7   mycroft #define INADDR_TO_IFP(addr, ifp) \
    169        1.4   hpeyerl 	/* struct in_addr addr; */ \
    170        1.4   hpeyerl 	/* struct ifnet *ifp; */ \
    171        1.4   hpeyerl { \
    172       1.39  augustss 	struct in_ifaddr *ia; \
    173        1.4   hpeyerl \
    174       1.21       tls 	INADDR_TO_IA(addr, ia); \
    175        1.4   hpeyerl 	(ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \
    176        1.4   hpeyerl }
    177        1.4   hpeyerl 
    178        1.4   hpeyerl /*
    179       1.21       tls  * Macro for finding an internet address structure (in_ifaddr) corresponding
    180        1.4   hpeyerl  * to a given interface (ifnet structure).
    181        1.4   hpeyerl  */
    182        1.7   mycroft #define IFP_TO_IA(ifp, ia) \
    183        1.4   hpeyerl 	/* struct ifnet *ifp; */ \
    184        1.4   hpeyerl 	/* struct in_ifaddr *ia; */ \
    185        1.4   hpeyerl { \
    186       1.39  augustss 	struct ifaddr *ifa; \
    187       1.21       tls \
    188       1.54      matt 	IFADDR_FOREACH(ifa, ifp) { \
    189       1.43      matt 		if (ifa->ifa_addr->sa_family == AF_INET) \
    190       1.43      matt 			break; \
    191       1.43      matt 	} \
    192       1.21       tls 	(ia) = ifatoia(ifa); \
    193        1.4   hpeyerl }
    194        1.4   hpeyerl #endif
    195        1.4   hpeyerl 
    196        1.4   hpeyerl /*
    197        1.4   hpeyerl  * Internet multicast address structure.  There is one of these for each IP
    198        1.4   hpeyerl  * multicast group to which this host belongs on a given network interface.
    199        1.4   hpeyerl  * They are kept in a linked list, rooted in the interface's in_ifaddr
    200        1.4   hpeyerl  * structure.
    201        1.4   hpeyerl  */
    202  1.65.32.1       tls struct router_info;
    203  1.65.32.1       tls 
    204        1.4   hpeyerl struct in_multi {
    205       1.45      matt 	LIST_ENTRY(in_multi) inm_list;	/* list of multicast addresses */
    206       1.45      matt 	struct	router_info *inm_rti;	/* router version info */
    207       1.45      matt 	struct	ifnet *inm_ifp;		/* back pointer to ifnet */
    208        1.4   hpeyerl 	struct	in_addr inm_addr;	/* IP multicast address */
    209        1.4   hpeyerl 	u_int	inm_refcount;		/* no. membership claims by sockets */
    210        1.4   hpeyerl 	u_int	inm_timer;		/* IGMP membership report timer */
    211       1.12   mycroft 	u_int	inm_state;		/* state of membership */
    212        1.4   hpeyerl };
    213        1.4   hpeyerl 
    214        1.9       jtc #ifdef _KERNEL
    215  1.65.32.1       tls 
    216  1.65.32.1       tls #include <net/pktqueue.h>
    217  1.65.32.1       tls 
    218  1.65.32.1       tls extern pktqueue_t *ip_pktq;
    219  1.65.32.1       tls 
    220        1.4   hpeyerl /*
    221  1.65.32.1       tls  * Structure used by functions below to remember position when stepping
    222  1.65.32.1       tls  * through all of the in_multi records.
    223        1.4   hpeyerl  */
    224        1.4   hpeyerl struct in_multistep {
    225       1.47    itojun 	int i_n;
    226        1.4   hpeyerl 	struct in_multi *i_inm;
    227        1.4   hpeyerl };
    228        1.4   hpeyerl 
    229  1.65.32.1       tls bool in_multi_group(struct in_addr, struct ifnet *, int);
    230  1.65.32.1       tls struct in_multi *in_first_multi(struct in_multistep *);
    231  1.65.32.1       tls struct in_multi *in_next_multi(struct in_multistep *);
    232  1.65.32.1       tls struct in_multi *in_lookup_multi(struct in_addr, struct ifnet *);
    233  1.65.32.1       tls struct in_multi *in_addmulti(struct in_addr *, struct ifnet *);
    234  1.65.32.1       tls void in_delmulti(struct in_multi *);
    235  1.65.32.1       tls 
    236  1.65.32.1       tls void in_multi_lock(int);
    237  1.65.32.1       tls void in_multi_unlock(void);
    238  1.65.32.1       tls int in_multi_lock_held(void);
    239        1.4   hpeyerl 
    240       1.36   thorpej struct ifaddr;
    241       1.36   thorpej 
    242       1.53    itojun int	in_ifinit(struct ifnet *,
    243       1.59    dyoung 	    struct in_ifaddr *, const struct sockaddr_in *, int);
    244       1.53    itojun void	in_savemkludge(struct in_ifaddr *);
    245       1.53    itojun void	in_restoremkludge(struct in_ifaddr *, struct ifnet *);
    246       1.53    itojun void	in_purgemkludge(struct ifnet *);
    247       1.53    itojun void	in_ifscrub(struct ifnet *, struct in_ifaddr *);
    248       1.53    itojun void	in_setmaxmtu(void);
    249       1.53    itojun const char *in_fmtaddr(struct in_addr);
    250  1.65.32.1       tls int	in_control(struct socket *, u_long, void *, struct ifnet *);
    251       1.60    dyoung void	in_purgeaddr(struct ifaddr *);
    252       1.53    itojun void	in_purgeif(struct ifnet *);
    253       1.53    itojun int	ipflow_fastforward(struct mbuf *);
    254       1.61      matt 
    255       1.65     rmind struct ipid_state;
    256       1.65     rmind typedef struct ipid_state ipid_state_t;
    257       1.65     rmind 
    258       1.65     rmind ipid_state_t *	ip_id_init(void);
    259       1.65     rmind void		ip_id_fini(ipid_state_t *);
    260       1.65     rmind uint16_t	ip_randomid(ipid_state_t *, uint16_t);
    261       1.65     rmind 
    262       1.65     rmind extern ipid_state_t *	ip_ids;
    263       1.65     rmind extern uint16_t		ip_id;
    264       1.65     rmind extern int		ip_do_randomid;
    265       1.61      matt 
    266       1.61      matt /*
    267       1.65     rmind  * ip_newid_range: "allocate" num contiguous IP IDs.
    268       1.61      matt  *
    269       1.65     rmind  * => Return the first ID.
    270       1.61      matt  */
    271       1.61      matt static __inline uint16_t
    272       1.65     rmind ip_newid_range(const struct in_ifaddr *ia, u_int num)
    273       1.61      matt {
    274       1.61      matt 	uint16_t id;
    275       1.61      matt 
    276       1.61      matt 	if (ip_do_randomid) {
    277       1.61      matt 		/* XXX ignore num */
    278       1.65     rmind 		return ip_randomid(ip_ids, ia ? ia->ia_idsalt : 0);
    279       1.61      matt 	}
    280       1.61      matt 
    281       1.65     rmind 	/* Never allow an IP ID of 0 (detect wrap). */
    282       1.65     rmind 	if ((uint16_t)(ip_id + num) < ip_id) {
    283       1.61      matt 		ip_id = 1;
    284       1.65     rmind 	}
    285       1.61      matt 	id = htons(ip_id);
    286       1.61      matt 	ip_id += num;
    287       1.61      matt 	return id;
    288       1.61      matt }
    289       1.61      matt 
    290       1.61      matt static __inline uint16_t
    291       1.61      matt ip_newid(const struct in_ifaddr *ia)
    292       1.61      matt {
    293       1.65     rmind 
    294       1.61      matt 	return ip_newid_range(ia, 1);
    295       1.61      matt }
    296       1.35    itojun 
    297       1.55    atatat #ifdef SYSCTLFN_PROTO
    298       1.55    atatat int	sysctl_inpcblist(SYSCTLFN_PROTO);
    299       1.55    atatat #endif
    300       1.55    atatat 
    301       1.65     rmind #endif	/* !_KERNEL */
    302       1.35    itojun 
    303       1.35    itojun /* INET6 stuff */
    304       1.35    itojun #include <netinet6/in6_var.h>
    305       1.20     perry 
    306       1.56      elad #endif /* !_NETINET_IN_VAR_H_ */
    307