in_var.h revision 71998
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: head/sys/netinet/in_var.h 71998 2001-02-04 12:37:48Z phk $ 35 */ 36 37#ifndef _NETINET_IN_VAR_H_ 38#define _NETINET_IN_VAR_H_ 39 40#include <sys/queue.h> 41 42/* 43 * Interface address, Internet version. One of these structures 44 * is allocated for each Internet address on an interface. 45 * The ifaddr structure contains the protocol-independent part 46 * of the structure and is assumed to be first. 47 */ 48struct in_ifaddr { 49 struct ifaddr ia_ifa; /* protocol-independent info */ 50#define ia_ifp ia_ifa.ifa_ifp 51#define ia_flags ia_ifa.ifa_flags 52 /* ia_{,sub}net{,mask} in host order */ 53 u_long ia_net; /* network number of interface */ 54 u_long ia_netmask; /* mask of net part */ 55 u_long ia_subnet; /* subnet number, including net */ 56 u_long ia_subnetmask; /* mask of subnet part */ 57 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 58 TAILQ_ENTRY(in_ifaddr) ia_link; /* tailq macro glue */ 59 struct sockaddr_in ia_addr; /* reserve space for interface name */ 60 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 61#define ia_broadaddr ia_dstaddr 62 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 63}; 64 65struct in_aliasreq { 66 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 67 struct sockaddr_in ifra_addr; 68 struct sockaddr_in ifra_broadaddr; 69#define ifra_dstaddr ifra_broadaddr 70 struct sockaddr_in ifra_mask; 71}; 72/* 73 * Given a pointer to an in_ifaddr (ifaddr), 74 * return a pointer to the addr as a sockaddr_in. 75 */ 76#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 77#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 78 79#define IN_LNAOF(in, ifa) \ 80 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 81 82 83#ifdef _KERNEL 84extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead; 85extern struct ifqueue ipintrq; /* ip packet input queue */ 86extern struct in_addr zeroin_addr; 87extern u_char inetctlerrmap[]; 88 89/* 90 * Macro for finding the interface (ifnet structure) corresponding to one 91 * of our IP addresses. 92 */ 93#define INADDR_TO_IFP(addr, ifp) \ 94 /* struct in_addr addr; */ \ 95 /* struct ifnet *ifp; */ \ 96{ \ 97 register struct in_ifaddr *ia; \ 98\ 99 for (ia = TAILQ_FIRST(&in_ifaddrhead); \ 100 ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \ 101 IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \ 102 ia = TAILQ_NEXT(ia, ia_link)) \ 103 continue; \ 104 if (ia == NULL) \ 105 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) \ 106 if (ia->ia_ifp->if_flags & IFF_POINTOPOINT && \ 107 IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \ 108 break; \ 109 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 110} 111 112/* 113 * Macro for finding the internet address structure (in_ifaddr) corresponding 114 * to a given interface (ifnet structure). 115 */ 116#define IFP_TO_IA(ifp, ia) \ 117 /* struct ifnet *ifp; */ \ 118 /* struct in_ifaddr *ia; */ \ 119{ \ 120 for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \ 121 (ia) != NULL && (ia)->ia_ifp != (ifp); \ 122 (ia) = TAILQ_NEXT((ia), ia_link)) \ 123 continue; \ 124} 125#endif 126 127/* 128 * This information should be part of the ifnet structure but we don't wish 129 * to change that - as it might break a number of things 130 */ 131 132struct router_info { 133 struct ifnet *rti_ifp; 134 int rti_type; /* type of router which is querier on this interface */ 135 int rti_time; /* # of slow timeouts since last old query */ 136 struct router_info *rti_next; 137}; 138 139/* 140 * Internet multicast address structure. There is one of these for each IP 141 * multicast group to which this host belongs on a given network interface. 142 * For every entry on the interface's if_multiaddrs list which represents 143 * an IP multicast group, there is one of these structures. They are also 144 * kept on a system-wide list to make it easier to keep our legacy IGMP code 145 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below). 146 */ 147struct in_multi { 148 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */ 149 struct in_addr inm_addr; /* IP multicast address, convenience */ 150 struct ifnet *inm_ifp; /* back pointer to ifnet */ 151 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */ 152 u_int inm_timer; /* IGMP membership report timer */ 153 u_int inm_state; /* state of the membership */ 154 struct router_info *inm_rti; /* router info*/ 155}; 156 157#ifdef _KERNEL 158 159#ifdef SYSCTL_DECL 160SYSCTL_DECL(_net_inet_ip); 161SYSCTL_DECL(_net_inet_raw); 162#endif 163 164extern LIST_HEAD(in_multihead, in_multi) in_multihead; 165 166/* 167 * Structure used by macros below to remember position when stepping through 168 * all of the in_multi records. 169 */ 170struct in_multistep { 171 struct in_multi *i_inm; 172}; 173 174/* 175 * Macro for looking up the in_multi record for a given IP multicast address 176 * on a given interface. If no matching record is found, "inm" is set null. 177 */ 178#define IN_LOOKUP_MULTI(addr, ifp, inm) \ 179 /* struct in_addr addr; */ \ 180 /* struct ifnet *ifp; */ \ 181 /* struct in_multi *inm; */ \ 182do { \ 183 register struct ifmultiaddr *ifma; \ 184\ 185 LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \ 186 if (ifma->ifma_addr->sa_family == AF_INET \ 187 && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \ 188 (addr).s_addr) \ 189 break; \ 190 } \ 191 (inm) = ifma ? ifma->ifma_protospec : 0; \ 192} while(0) 193 194/* 195 * Macro to step through all of the in_multi records, one at a time. 196 * The current position is remembered in "step", which the caller must 197 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 198 * and get the first record. Both macros return a NULL "inm" when there 199 * are no remaining records. 200 */ 201#define IN_NEXT_MULTI(step, inm) \ 202 /* struct in_multistep step; */ \ 203 /* struct in_multi *inm; */ \ 204do { \ 205 if (((inm) = (step).i_inm) != NULL) \ 206 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \ 207} while(0) 208 209#define IN_FIRST_MULTI(step, inm) \ 210 /* struct in_multistep step; */ \ 211 /* struct in_multi *inm; */ \ 212do { \ 213 (step).i_inm = LIST_FIRST(&in_multihead); \ 214 IN_NEXT_MULTI((step), (inm)); \ 215} while(0) 216 217struct route; 218struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); 219void in_delmulti __P((struct in_multi *)); 220int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *, 221 struct proc *)); 222void in_rtqdrain __P((void)); 223void ip_input __P((struct mbuf *)); 224int in_ifadown __P((struct ifaddr *ifa)); 225void in_ifscrub __P((struct ifnet *, struct in_ifaddr *)); 226int ipflow_fastforward __P((struct mbuf *)); 227void ipflow_create __P((const struct route *, struct mbuf *)); 228void ipflow_slowtimo __P((void)); 229 230#endif /* _KERNEL */ 231 232/* INET6 stuff */ 233#include <netinet6/in6_var.h> 234 235#endif /* _NETINET_IN_VAR_H_ */ 236