1/* 2 * Copyright (c) 2000-2008 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1985, 1986, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in_var.h 8.2 (Berkeley) 1/9/95 61 * $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.2 2001/07/17 10:50:01 ru Exp $ 62 */ 63 64#ifndef _NETINET_IN_VAR_H_ 65#define _NETINET_IN_VAR_H_ 66#include <sys/appleapiopts.h> 67 68#include <sys/queue.h> 69#ifdef __APPLE__ 70#include <sys/kern_event.h> 71#endif 72 73#ifdef PRIVATE 74#include <net/route.h> 75 76/* 77 * Interface address, Internet version. One of these structures 78 * is allocated for each Internet address on an interface. 79 * The ifaddr structure contains the protocol-independent part 80 * of the structure and is assumed to be first. 81 */ 82struct in_ifaddr { 83 struct ifaddr ia_ifa; /* protocol-independent info */ 84#define ia_ifp ia_ifa.ifa_ifp 85#define ia_flags ia_ifa.ifa_flags 86 /* ia_{,sub}net{,mask} in host order */ 87 u_long ia_net; /* network number of interface */ 88 u_long ia_netmask; /* mask of net part */ 89 u_long ia_subnet; /* subnet number, including net */ 90 u_long ia_subnetmask; /* mask of subnet part */ 91 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 92 TAILQ_ENTRY(in_ifaddr) ia_link; /* tailq macro glue */ 93 struct sockaddr_in ia_addr; /* reserve space for interface name */ 94 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 95#define ia_broadaddr ia_dstaddr 96 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 97}; 98#endif /* PRIVATE */ 99 100struct in_aliasreq { 101 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 102 struct sockaddr_in ifra_addr; 103 struct sockaddr_in ifra_broadaddr; 104#define ifra_dstaddr ifra_broadaddr 105 struct sockaddr_in ifra_mask; 106 u_int32_t ifra_unused; /* not used: used to be 'dlt' */ 107}; 108 109/* 110 * Event data, internet style. 111 */ 112struct kev_in_data { 113 struct net_event_data link_data; 114 struct in_addr ia_addr; 115 u_int32_t ia_net; /* network number of interface */ 116 u_int32_t ia_netmask; /* mask of net part */ 117 u_int32_t ia_subnet; /* subnet number, including net */ 118 u_int32_t ia_subnetmask; /* mask of subnet part */ 119 struct in_addr ia_netbroadcast;/* to recognize net broadcasts */ 120 struct in_addr ia_dstaddr; 121}; 122 123struct kev_in_collision { 124 struct net_event_data link_data; /* link colliding arp was received on */ 125 struct in_addr ia_ipaddr; /* IP address we and another node are using */ 126 u_char hw_len; /* length of hardware address */ 127 u_char hw_addr[0]; /* variable length hardware address */ 128}; 129 130#ifdef __APPLE_API_PRIVATE 131struct kev_in_portinuse { 132 u_int16_t port; /* conflicting port number in host order */ 133 u_int32_t req_pid; /* PID port requestor */ 134 u_int32_t reserved[2]; 135}; 136#endif 137 138 139/* 140 * Define inet event subclass and specific inet events. 141 */ 142 143#define KEV_INET_SUBCLASS 1 144 145#define KEV_INET_NEW_ADDR 1 146#define KEV_INET_CHANGED_ADDR 2 147#define KEV_INET_ADDR_DELETED 3 148#define KEV_INET_SIFDSTADDR 4 149#define KEV_INET_SIFBRDADDR 5 150#define KEV_INET_SIFNETMASK 6 151#define KEV_INET_ARPCOLLISION 7 /* use kev_in_collision */ 152 153#ifdef __APPLE_API_PRIVATE 154#define KEV_INET_PORTINUSE 8 /* use ken_in_portinuse */ 155#endif 156 157#ifdef KERNEL_PRIVATE 158/* 159 * Given a pointer to an in_ifaddr (ifaddr), 160 * return a pointer to the addr as a sockaddr_in. 161 */ 162#define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 163#define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 164 165#define IN_LNAOF(in, ifa) \ 166 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 167 168extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr) in_ifaddrhead; 169extern struct ifqueue ipintrq; /* ip packet input queue */ 170extern struct in_addr zeroin_addr; 171extern u_char inetctlerrmap[]; 172extern lck_mtx_t *rt_mtx; 173 174extern int apple_hwcksum_tx; 175extern int apple_hwcksum_rx; 176 177/* 178 * Macro for finding the interface (ifnet structure) corresponding to one 179 * of our IP addresses. 180 */ 181#define INADDR_TO_IFP(addr, ifp) \ 182 /* struct in_addr addr; */ \ 183 /* struct ifnet *ifp; */ \ 184{ \ 185 struct in_ifaddr *ia; \ 186\ 187 lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \ 188 lck_mtx_lock(rt_mtx); \ 189 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) \ 190 if (IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \ 191 break; \ 192 (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ 193 lck_mtx_unlock(rt_mtx); \ 194} 195 196/* 197 * Macro for finding the internet address structure (in_ifaddr) corresponding 198 * to a given interface (ifnet structure). 199 */ 200#define IFP_TO_IA(ifp, ia) \ 201 /* struct ifnet *ifp; */ \ 202 /* struct in_ifaddr *ia; */ \ 203{ \ 204 lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_NOTOWNED); \ 205 lck_mtx_lock(rt_mtx); \ 206 for ((ia) = TAILQ_FIRST(&in_ifaddrhead); \ 207 (ia) != NULL && (ia)->ia_ifp != (ifp); \ 208 (ia) = TAILQ_NEXT((ia), ia_link)) \ 209 continue; \ 210 lck_mtx_unlock(rt_mtx); \ 211} 212 213/* 214 * This information should be part of the ifnet structure but we don't wish 215 * to change that - as it might break a number of things 216 */ 217 218struct router_info { 219 struct ifnet *rti_ifp; 220 int rti_type; /* type of router which is querier on this interface */ 221 int rti_time; /* # of slow timeouts since last old query */ 222 struct router_info *rti_next; 223}; 224 225/* 226 * Internet multicast address structure. There is one of these for each IP 227 * multicast group to which this host belongs on a given network interface. 228 * For every entry on the interface's if_multiaddrs list which represents 229 * an IP multicast group, there is one of these structures. They are also 230 * kept on a system-wide list to make it easier to keep our legacy IGMP code 231 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below). 232 */ 233struct in_multi { 234 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */ 235 struct in_addr inm_addr; /* IP multicast address, convenience */ 236 struct ifnet *inm_ifp; /* back pointer to ifnet */ 237 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */ 238 u_int inm_timer; /* IGMP membership report timer */ 239 u_int inm_state; /* state of the membership */ 240 struct router_info *inm_rti; /* router info*/ 241}; 242 243#ifdef SYSCTL_DECL 244SYSCTL_DECL(_net_inet_ip); 245SYSCTL_DECL(_net_inet_raw); 246#endif 247 248extern LIST_HEAD(in_multihead, in_multi) in_multihead; 249 250/* 251 * Structure used by macros below to remember position when stepping through 252 * all of the in_multi records. 253 */ 254struct in_multistep { 255 struct in_multi *i_inm; 256}; 257 258/* 259 * Macro for looking up the in_multi record for a given IP multicast address 260 * on a given interface. If no matching record is found, "inm" is set null. 261 */ 262#define IN_LOOKUP_MULTI(addr, ifp, inm) \ 263 /* struct in_addr addr; */ \ 264 /* struct ifnet *ifp; */ \ 265 /* struct in_multi *inm; */ \ 266do { \ 267 struct ifmultiaddr *ifma; \ 268\ 269 LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) { \ 270 if (ifma->ifma_addr->sa_family == AF_INET \ 271 && ((struct sockaddr_in *)ifma->ifma_addr)->sin_addr.s_addr == \ 272 (addr).s_addr) \ 273 break; \ 274 } \ 275 (inm) = ifma ? ifma->ifma_protospec : NULL; \ 276} while(0) 277 278/* 279 * Macro to step through all of the in_multi records, one at a time. 280 * The current position is remembered in "step", which the caller must 281 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 282 * and get the first record. Both macros return a NULL "inm" when there 283 * are no remaining records. 284 */ 285#define IN_NEXT_MULTI(step, inm) \ 286 /* struct in_multistep step; */ \ 287 /* struct in_multi *inm; */ \ 288do { \ 289 if (((inm) = (step).i_inm) != NULL) \ 290 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \ 291} while(0) 292 293#define IN_FIRST_MULTI(step, inm) \ 294 /* struct in_multistep step; */ \ 295 /* struct in_multi *inm; */ \ 296do { \ 297 (step).i_inm = LIST_FIRST(&in_multihead); \ 298 IN_NEXT_MULTI((step), (inm)); \ 299} while(0) 300 301struct route; 302struct in_multi *in_addmulti(struct in_addr *, struct ifnet *); 303void in_delmulti(struct in_multi **); 304int in_control(struct socket *, u_long, caddr_t, struct ifnet *, 305 struct proc *); 306void in_rtqdrain(void); 307extern struct radix_node *in_validate(struct radix_node *); 308void ip_input(struct mbuf *); 309int in_ifadown(struct ifaddr *ifa, int); 310void in_ifscrub(struct ifnet *, struct in_ifaddr *, int); 311int ipflow_fastforward(struct mbuf *); 312void ipflow_create(const struct route *, struct mbuf *); 313void ipflow_slowtimo(void); 314 315#endif /* KERNEL_PRIVATE */ 316 317/* INET6 stuff */ 318#include <netinet6/in6_var.h> 319 320#endif /* _NETINET_IN_VAR_H_ */ 321