/* * Copyright (c) 1985, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)in_var.h 8.2 (Berkeley) 1/9/95 * $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.3 2001/12/14 20:09:34 jlemon Exp $ */ #ifndef _NETINET_IN_VAR_H_ #define _NETINET_IN_VAR_H_ #ifndef _SYS_QUEUE_H_ #include <sys/queue.h> #endif #ifndef _NET_IF_VAR_H_ #include <net/if_var.h> #endif #ifndef _NETINET_IN_H_ #include <netinet/in.h> #endif /* * Interface address, Internet version. One of these structures * is allocated for each Internet address on an interface. * The ifaddr structure contains the protocol-independent part * of the structure and is assumed to be first. */ struct in_ifaddr { struct ifaddr ia_ifa; /* protocol-independent info */ #define ia_ifp ia_ifa.ifa_ifp #define ia_flags ia_ifa.ifa_flags /* ia_{,sub}net{,mask} in host order */ u_long ia_net; /* network number of interface */ u_long ia_netmask; /* mask of net part */ u_long ia_subnet; /* subnet number, including net */ u_long ia_subnetmask; /* mask of subnet part */ struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ void *ia_pad1[2]; void *ia_pad2[2]; struct sockaddr_in ia_addr; /* reserve space for interface name */ struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ #define ia_broadaddr ia_dstaddr struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ }; struct in_aliasreq { char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ struct sockaddr_in ifra_addr; struct sockaddr_in ifra_broadaddr; #define ifra_dstaddr ifra_broadaddr struct sockaddr_in ifra_mask; }; /* * Given a pointer to an in_ifaddr (ifaddr), * return a pointer to the addr as a sockaddr_in. */ #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) #if 0 #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) #define IN_LNAOF(in, ifa) \ ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) #endif #ifdef _KERNEL #include <sys/fnv_hash.h> struct in_ifaddr_container; extern struct in_addr zeroin_addr; extern u_char inetctlerrmap[]; /* * Hash table for IP addresses. */ extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr_container) *in_ifaddrhashtbls[]; extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr_container) in_ifaddrheads[]; extern u_long in_ifaddrhmask; /* mask for hash table */ #define INADDR_NHASH_LOG2 9 #define INADDR_NHASH (1 << INADDR_NHASH_LOG2) #define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT) #define INADDR_HASH(x) \ (&in_ifaddrhashtbls[mycpuid][INADDR_HASHVAL(x) & in_ifaddrhmask]) /* * Function for finding the interface (ifnet structure) corresponding to one * of our IP addresses. */ static __inline struct ifnet * INADDR_TO_IFP(const struct in_addr *_addr) { struct in_ifaddr_container *_iac; LIST_FOREACH(_iac, INADDR_HASH(_addr->s_addr), ia_hash) { if (IA_SIN(_iac->ia)->sin_addr.s_addr == _addr->s_addr) return _iac->ia->ia_ifp; } return NULL; } /* * Function for finding the internet address structure (in_ifaddr) corresponding * to a given interface (ifnet structure). */ static __inline struct in_ifaddr * IFP_TO_IA(const struct ifnet *_ifp) { struct in_ifaddr_container *_iac; TAILQ_FOREACH(_iac, &in_ifaddrheads[mycpuid], ia_link) if (_iac->ia->ia_ifp == _ifp) return _iac->ia; return NULL; } #endif /* _KERNEL */ #ifdef _KERNEL /* * This information should be part of the ifnet structure but we don't wish * to change that - as it might break a number of things */ struct router_info { struct ifnet *rti_ifp; int rti_type; /* type of router which is querier on this interface */ int rti_time; /* # of slow timeouts since last old query */ struct router_info *rti_next; }; /* * Internet multicast address structure. There is one of these for each IP * multicast group to which this host belongs on a given network interface. * For every entry on the interface's if_multiaddrs list which represents * an IP multicast group, there is one of these structures. They are also * kept on a system-wide list to make it easier to keep our legacy IGMP code * compatible with the rest of the world (see IN_FIRST_MULTI et al, below). */ struct in_multi { LIST_ENTRY(in_multi) inm_link; /* queue macro glue */ struct in_addr inm_addr; /* IP multicast address, convenience */ struct ifnet *inm_ifp; /* back pointer to ifnet */ struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */ u_int inm_timer; /* IGMP membership report timer */ u_int inm_state; /* state of the membership */ struct router_info *inm_rti; /* router info*/ }; #endif /* _KERNEL */ #ifdef _KERNEL #ifdef SYSCTL_DECL SYSCTL_DECL(_net_inet_ip); SYSCTL_DECL(_net_inet_raw); #endif extern LIST_HEAD(in_multihead, in_multi) in_multihead; /* * Structure used by macros below to remember position when stepping through * all of the in_multi records. */ struct in_multistep { struct in_multi *i_inm; }; /* * Look up the in_multi record for a given IP multicast address on a given * interface. If no matching record is found, NULL is returned. */ static __inline struct in_multi * IN_LOOKUP_MULTI(const struct in_addr *_addr, struct ifnet *_ifp) { const struct ifmultiaddr *_ifma; struct in_multi *_inm = NULL; if (_ifp == NULL) return NULL; /* TODO: need ifnet_serialize_main */ ifnet_serialize_all(_ifp); TAILQ_FOREACH(_ifma, &_ifp->if_multiaddrs, ifma_link) { if (_ifma->ifma_addr->sa_family == AF_INET && ((struct sockaddr_in *)_ifma->ifma_addr)->sin_addr.s_addr == _addr->s_addr) { _inm = _ifma->ifma_protospec; break; } } ifnet_deserialize_all(_ifp); return _inm; } /* * Macro to step through all of the in_multi records, one at a time. * The current position is remembered in "step", which the caller must * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" * and get the first record. Both macros return a NULL "inm" when there * are no remaining records. */ #define IN_NEXT_MULTI(step, inm) \ /* struct in_multistep step; */ \ /* struct in_multi *inm; */ \ do { \ if (((inm) = (step).i_inm) != NULL) \ (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \ } while(0) #define IN_FIRST_MULTI(step, inm) \ /* struct in_multistep step; */ \ /* struct in_multi *inm; */ \ do { \ (step).i_inm = LIST_FIRST(&in_multihead); \ IN_NEXT_MULTI((step), (inm)); \ } while(0) struct route; struct lwkt_serialize; union netmsg; void in_ifdetach(struct ifnet *ifp); void in_if_down(struct ifnet *ifp); struct in_multi *in_addmulti (struct in_addr *, struct ifnet *); void in_delmulti (struct in_multi *); int in_control (u_long, caddr_t, struct ifnet *, struct thread *); void in_control_dispatch(union netmsg *); void in_rtqdrain (void); void ip_input (struct mbuf *); void ip_forward (struct mbuf *, boolean_t, struct sockaddr_in *); int in_ifadown (struct ifaddr *ifa, int); int in_ifadown_force (struct ifaddr *ifa, int); void in_ifscrub (struct ifnet *, struct in_ifaddr *); void in_iaunlink (struct in_ifaddr *); void in_iahash_insert (struct in_ifaddr *); void in_iahash_remove (struct in_ifaddr *); #endif /* _KERNEL */ /* INET6 stuff */ #include <netinet6/in6_var.h> #endif /* _NETINET_IN_VAR_H_ */
