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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)in_var.h 8.2 (Berkeley) 1/9/95 30 * $FreeBSD: src/sys/netinet/in_var.h,v 1.33.2.3 2001/12/14 20:09:34 jlemon Exp $ 31 */ 32 33 #ifndef _NETINET_IN_VAR_H_ 34 #define _NETINET_IN_VAR_H_ 35 36 #ifndef _SYS_QUEUE_H_ 37 #include <sys/queue.h> 38 #endif 39 #ifndef _NET_IF_VAR_H_ 40 #include <net/if_var.h> 41 #endif 42 #ifndef _NETINET_IN_H_ 43 #include <netinet/in.h> 44 #endif 45 46 /* 47 * Interface address, Internet version. One of these structures 48 * is allocated for each Internet address on an interface. 49 * The ifaddr structure contains the protocol-independent part 50 * of the structure and is assumed to be first. 51 */ 52 struct in_ifaddr { 53 struct ifaddr ia_ifa; /* protocol-independent info */ 54 #define ia_ifp ia_ifa.ifa_ifp 55 #define ia_flags ia_ifa.ifa_flags 56 /* ia_{,sub}net{,mask} in host order */ 57 u_long ia_net; /* network number of interface */ 58 u_long ia_netmask; /* mask of net part */ 59 u_long ia_subnet; /* subnet number, including net */ 60 u_long ia_subnetmask; /* mask of subnet part */ 61 struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ 62 void *ia_pad1[2]; 63 void *ia_pad2[2]; 64 struct sockaddr_in ia_addr; /* reserve space for interface name */ 65 struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ 66 #define ia_broadaddr ia_dstaddr 67 struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ 68 }; 69 70 struct in_aliasreq { 71 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 72 struct sockaddr_in ifra_addr; 73 struct sockaddr_in ifra_broadaddr; 74 #define ifra_dstaddr ifra_broadaddr 75 struct sockaddr_in ifra_mask; 76 }; 77 78 /* 79 * Given a pointer to an in_ifaddr (ifaddr), 80 * return a pointer to the addr as a sockaddr_in. 81 */ 82 #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) 83 #if 0 84 #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) 85 86 #define IN_LNAOF(in, ifa) \ 87 ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) 88 #endif 89 90 91 #ifdef _KERNEL 92 #include <sys/fnv_hash.h> 93 94 struct in_ifaddr_container; 95 96 extern struct in_addr zeroin_addr; 97 extern u_char inetctlerrmap[]; 98 99 /* 100 * Hash table for IP addresses. 101 */ 102 extern LIST_HEAD(in_ifaddrhashhead, in_ifaddr_container) *in_ifaddrhashtbls[]; 103 extern TAILQ_HEAD(in_ifaddrhead, in_ifaddr_container) in_ifaddrheads[]; 104 extern u_long in_ifaddrhmask; /* mask for hash table */ 105 106 #define INADDR_NHASH_LOG2 9 107 #define INADDR_NHASH (1 << INADDR_NHASH_LOG2) 108 #define INADDR_HASHVAL(x) fnv_32_buf((&(x)), sizeof(x), FNV1_32_INIT) 109 #define INADDR_HASH(x) \ 110 (&in_ifaddrhashtbls[mycpuid][INADDR_HASHVAL(x) & in_ifaddrhmask]) 111 112 113 /* 114 * Function for finding the interface (ifnet structure) corresponding to one 115 * of our IP addresses. 116 */ 117 static __inline struct ifnet * 118 INADDR_TO_IFP(const struct in_addr *_addr) 119 { 120 struct in_ifaddr_container *_iac; 121 122 LIST_FOREACH(_iac, INADDR_HASH(_addr->s_addr), ia_hash) { 123 if (IA_SIN(_iac->ia)->sin_addr.s_addr == _addr->s_addr) 124 return _iac->ia->ia_ifp; 125 } 126 return NULL; 127 } 128 129 /* 130 * Function for finding the internet address structure (in_ifaddr) corresponding 131 * to a given interface (ifnet structure). 132 */ 133 static __inline struct in_ifaddr * 134 IFP_TO_IA(const struct ifnet *_ifp) 135 { 136 struct in_ifaddr_container *_iac; 137 138 TAILQ_FOREACH(_iac, &in_ifaddrheads[mycpuid], ia_link) 139 if (_iac->ia->ia_ifp == _ifp) 140 return _iac->ia; 141 return NULL; 142 } 143 144 #endif /* _KERNEL */ 145 146 #ifdef _KERNEL 147 /* 148 * This information should be part of the ifnet structure but we don't wish 149 * to change that - as it might break a number of things 150 */ 151 152 struct router_info { 153 struct ifnet *rti_ifp; 154 int rti_type; /* type of router which is querier on this interface */ 155 int rti_time; /* # of slow timeouts since last old query */ 156 struct router_info *rti_next; 157 }; 158 159 /* 160 * Internet multicast address structure. There is one of these for each IP 161 * multicast group to which this host belongs on a given network interface. 162 * For every entry on the interface's if_multiaddrs list which represents 163 * an IP multicast group, there is one of these structures. They are also 164 * kept on a system-wide list to make it easier to keep our legacy IGMP code 165 * compatible with the rest of the world (see IN_FIRST_MULTI et al, below). 166 */ 167 struct in_multi { 168 LIST_ENTRY(in_multi) inm_link; /* queue macro glue */ 169 struct in_addr inm_addr; /* IP multicast address, convenience */ 170 struct ifnet *inm_ifp; /* back pointer to ifnet */ 171 struct ifmultiaddr *inm_ifma; /* back pointer to ifmultiaddr */ 172 u_int inm_timer; /* IGMP membership report timer */ 173 u_int inm_state; /* state of the membership */ 174 struct router_info *inm_rti; /* router info*/ 175 }; 176 #endif /* _KERNEL */ 177 178 #ifdef _KERNEL 179 180 #ifdef SYSCTL_DECL 181 SYSCTL_DECL(_net_inet_ip); 182 SYSCTL_DECL(_net_inet_raw); 183 #endif 184 185 extern LIST_HEAD(in_multihead, in_multi) in_multihead; 186 187 /* 188 * Structure used by macros below to remember position when stepping through 189 * all of the in_multi records. 190 */ 191 struct in_multistep { 192 struct in_multi *i_inm; 193 }; 194 195 /* 196 * Look up the in_multi record for a given IP multicast address on a given 197 * interface. If no matching record is found, NULL is returned. 198 */ 199 static __inline struct in_multi * 200 IN_LOOKUP_MULTI(const struct in_addr *_addr, struct ifnet *_ifp) 201 { 202 const struct ifmultiaddr *_ifma; 203 struct in_multi *_inm = NULL; 204 205 if (_ifp == NULL) 206 return NULL; 207 208 /* TODO: need ifnet_serialize_main */ 209 ifnet_serialize_all(_ifp); 210 TAILQ_FOREACH(_ifma, &_ifp->if_multiaddrs, ifma_link) { 211 if (_ifma->ifma_addr->sa_family == AF_INET && 212 ((struct sockaddr_in *)_ifma->ifma_addr)->sin_addr.s_addr == 213 _addr->s_addr) { 214 _inm = _ifma->ifma_protospec; 215 break; 216 } 217 } 218 ifnet_deserialize_all(_ifp); 219 220 return _inm; 221 } 222 223 /* 224 * Macro to step through all of the in_multi records, one at a time. 225 * The current position is remembered in "step", which the caller must 226 * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" 227 * and get the first record. Both macros return a NULL "inm" when there 228 * are no remaining records. 229 */ 230 #define IN_NEXT_MULTI(step, inm) \ 231 /* struct in_multistep step; */ \ 232 /* struct in_multi *inm; */ \ 233 do { \ 234 if (((inm) = (step).i_inm) != NULL) \ 235 (step).i_inm = LIST_NEXT((step).i_inm, inm_link); \ 236 } while(0) 237 238 #define IN_FIRST_MULTI(step, inm) \ 239 /* struct in_multistep step; */ \ 240 /* struct in_multi *inm; */ \ 241 do { \ 242 (step).i_inm = LIST_FIRST(&in_multihead); \ 243 IN_NEXT_MULTI((step), (inm)); \ 244 } while(0) 245 246 struct route; 247 struct lwkt_serialize; 248 union netmsg; 249 250 void in_ifdetach(struct ifnet *ifp); 251 void in_if_down(struct ifnet *ifp); 252 struct in_multi *in_addmulti (struct in_addr *, struct ifnet *); 253 void in_delmulti (struct in_multi *); 254 int in_control (u_long, caddr_t, struct ifnet *, struct thread *); 255 void in_control_dispatch(union netmsg *); 256 void in_rtqdrain (void); 257 void ip_input (struct mbuf *); 258 void ip_forward (struct mbuf *, boolean_t, struct sockaddr_in *); 259 int in_ifadown (struct ifaddr *ifa, int); 260 int in_ifadown_force (struct ifaddr *ifa, int); 261 void in_ifscrub (struct ifnet *, struct in_ifaddr *); 262 void in_iaunlink (struct in_ifaddr *); 263 void in_iahash_insert (struct in_ifaddr *); 264 void in_iahash_remove (struct in_ifaddr *); 265 266 #endif /* _KERNEL */ 267 268 /* INET6 stuff */ 269 #include <netinet6/in6_var.h> 270 271 #endif /* _NETINET_IN_VAR_H_ */ 272