bsd/netinet/in_pcb.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1990, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)in_pcb.h    8.1 (Berkeley) 6/10/93
  55  * $FreeBSD: src/sys/netinet/in_pcb.h,v 1.32.2.4 2001/08/13 16:26:17 ume Exp $
  56  */
  57
  58 #ifndef _NETINET_IN_PCB_H_
  59 #define _NETINET_IN_PCB_H_
  60 #include <sys/appleapiopts.h>
  61
  62 #include <sys/queue.h>
  63
  64
  65 #include <netinet6/ipsec.h> /* for IPSEC */
  66
  67 #ifdef __APPLE_API_PRIVATE
  68
  69 #define in6pcb          inpcb   /* for KAME src sync over BSD*'s */
  70 #define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */
  71
  72 /*
  73  * Common structure pcb for internet protocol implementation.
  74  * Here are stored pointers to local and foreign host table
  75  * entries, local and foreign socket numbers, and pointers
  76  * up (to a socket structure) and down (to a protocol-specific)
  77  * control block.
  78  */
  79 LIST_HEAD(inpcbhead, inpcb);
  80 LIST_HEAD(inpcbporthead, inpcbport);
  81 typedef u_quad_t        inp_gen_t;
  82
  83 /*
  84  * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
  85  * So, AF_INET6 null laddr is also used as AF_INET null laddr,
  86  * by utilize following structure. (At last, same as INRIA)
  87  */
  88 struct in_addr_4in6 {
  89         u_int32_t       ia46_pad32[3];
  90         struct  in_addr ia46_addr4;
  91 };
  92
  93 /*
  94  * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
  95  * of the structure.  Therefore, it is important that the members in
  96  * that position not contain any information which is required to be
  97  * stable.
  98  */
  99 struct  icmp6_filter;
 100
 101 struct inpcb {
 102         LIST_ENTRY(inpcb) inp_hash;     /* hash list */
 103         struct  in_addr inp_faddr;      /* foreign host table entry */
 104         struct  in_addr inp_laddr;      /* local host table entry */
 105         u_short inp_fport;              /* foreign port */
 106         u_short inp_lport;              /* local port */
 107         LIST_ENTRY(inpcb) inp_list;     /* list for all PCBs of this proto */
 108         caddr_t inp_ppcb;               /* pointer to per-protocol pcb */
 109         struct  inpcbinfo *inp_pcbinfo; /* PCB list info */
 110         struct  socket *inp_socket;     /* back pointer to socket */
 111         u_char  nat_owner;              /* Used to NAT TCP/UDP traffic */
 112         u_long  nat_cookie;             /* Cookie stored and returned to NAT */
 113         LIST_ENTRY(inpcb) inp_portlist; /* list for this PCB's local port */
 114         struct  inpcbport *inp_phd;     /* head of this list */
 115         inp_gen_t inp_gencnt;           /* generation count of this instance */
 116         int     inp_flags;              /* generic IP/datagram flags */
 117         u_int32_t inp_flow;
 118
 119         u_char  inp_vflag;
 120 #define INP_IPV4        0x1
 121 #define INP_IPV6        0x2
 122
 123         u_char inp_ip_ttl;              /* time to live proto */
 124         u_char inp_ip_p;                /* protocol proto */
 125         /* protocol dependent part */
 126         union {
 127                 /* foreign host table entry */
 128                 struct  in_addr_4in6 inp46_foreign;
 129                 struct  in6_addr inp6_foreign;
 130         } inp_dependfaddr;
 131         union {
 132                 /* local host table entry */
 133                 struct  in_addr_4in6 inp46_local;
 134                 struct  in6_addr inp6_local;
 135         } inp_dependladdr;
 136         union {
 137                 /* placeholder for routing entry */
 138                 struct  route inp4_route;
 139                 struct  route_in6 inp6_route;
 140         } inp_dependroute;
 141         struct {
 142                 /* type of service proto */
 143                 u_char inp4_ip_tos;
 144                 /* IP options */
 145                 struct mbuf *inp4_options;
 146                 /* IP multicast options */
 147                 struct ip_moptions *inp4_moptions;
 148         } inp_depend4;
 149 #define inp_faddr       inp_dependfaddr.inp46_foreign.ia46_addr4
 150 #define inp_laddr       inp_dependladdr.inp46_local.ia46_addr4
 151 #define inp_route       inp_dependroute.inp4_route
 152 #define inp_ip_tos      inp_depend4.inp4_ip_tos
 153 #define inp_options     inp_depend4.inp4_options
 154 #define inp_moptions    inp_depend4.inp4_moptions
 155         struct {
 156                 /* IP options */
 157                 struct mbuf *inp6_options;
 158                 u_int8_t        inp6_hlim;
 159                 u_int8_t        unused_uint8_1;
 160                 ushort  unused_uint16_1;
 161                 /* IP6 options for outgoing packets */
 162                 struct  ip6_pktopts *inp6_outputopts;
 163                 /* IP multicast options */
 164                 struct  ip6_moptions *inp6_moptions;
 165                 /* ICMPv6 code type filter */
 166                 struct  icmp6_filter *inp6_icmp6filt;
 167                 /* IPV6_CHECKSUM setsockopt */
 168                 int     inp6_cksum;
 169                 u_short inp6_ifindex;
 170                 short   inp6_hops;
 171         } inp_depend6;
 172 #define in6p_faddr      inp_dependfaddr.inp6_foreign
 173 #define in6p_laddr      inp_dependladdr.inp6_local
 174 #define in6p_route      inp_dependroute.inp6_route
 175 #define in6p_ip6_hlim   inp_depend6.inp6_hlim
 176 #define in6p_hops       inp_depend6.inp6_hops   /* default hop limit */
 177 #define in6p_ip6_nxt    inp_ip_p
 178 #define in6p_flowinfo   inp_flow
 179 #define in6p_vflag      inp_vflag
 180 #define in6p_options    inp_depend6.inp6_options
 181 #define in6p_outputopts inp_depend6.inp6_outputopts
 182 #define in6p_moptions   inp_depend6.inp6_moptions
 183 #define in6p_icmp6filt  inp_depend6.inp6_icmp6filt
 184 #define in6p_cksum      inp_depend6.inp6_cksum
 185 #define inp6_ifindex    inp_depend6.inp6_ifindex
 186 #define in6p_flags      inp_flags  /* for KAME src sync over BSD*'s */
 187 #define in6p_socket     inp_socket  /* for KAME src sync over BSD*'s */
 188 #define in6p_lport      inp_lport  /* for KAME src sync over BSD*'s */
 189 #define in6p_fport      inp_fport  /* for KAME src sync over BSD*'s */
 190 #define in6p_ppcb       inp_ppcb  /* for KAME src sync over BSD*'s */
 191
 192         int     hash_element;           /* Array index of pcb's hash list    */
 193         caddr_t inp_saved_ppcb;         /* place to save pointer while cached */
 194         struct inpcbpolicy *inp_sp;
 195         u_long  reserved[3];            /* For future use */
 196 };
 197 #endif /* __APPLE_API_PRIVATE */
 198 /*
 199  * The range of the generation count, as used in this implementation,
 200  * is 9e19.  We would have to create 300 billion connections per
 201  * second for this number to roll over in a year.  This seems sufficiently
 202  * unlikely that we simply don't concern ourselves with that possibility.
 203  */
 204
 205 /*
 206  * Interface exported to userland by various protocols which use
 207  * inpcbs.  Hack alert -- only define if struct xsocket is in scope.
 208  */
 209 #ifdef _SYS_SOCKETVAR_H_
 210 struct  xinpcb {
 211         size_t  xi_len;         /* length of this structure */
 212         struct  inpcb xi_inp;
 213         struct  xsocket xi_socket;
 214         u_quad_t        xi_alignment_hack;
 215 };
 216
 217 struct  xinpgen {
 218         size_t  xig_len;        /* length of this structure */
 219         u_int   xig_count;      /* number of PCBs at this time */
 220         inp_gen_t xig_gen;      /* generation count at this time */
 221         so_gen_t xig_sogen;     /* socket generation count at this time */
 222 };
 223 #endif /* _SYS_SOCKETVAR_H_ */
 224
 225 #ifdef __APPLE_API_PRIVATE
 226 struct inpcbport {
 227         LIST_ENTRY(inpcbport) phd_hash;
 228         struct inpcbhead phd_pcblist;
 229         u_short phd_port;
 230 };
 231
 232 struct inpcbinfo {              /* XXX documentation, prefixes */
 233         struct  inpcbhead *hashbase;
 234 #ifdef __APPLE__
 235         u_long  hashsize; /* in elements */
 236 #endif
 237         u_long  hashmask;
 238         struct  inpcbporthead *porthashbase;
 239         u_long  porthashmask;
 240         struct  inpcbhead *listhead;
 241         u_short lastport;
 242         u_short lastlow;
 243         u_short lasthi;
 244         void   *ipi_zone; /* zone to allocate pcbs from */
 245         u_int   ipi_count;      /* number of pcbs in this list */
 246         u_quad_t ipi_gencnt;    /* current generation count */
 247 #ifdef __APPLE__
 248         u_char   all_owners;
 249         struct  socket nat_dummy_socket;
 250         struct  inpcb *last_pcb;
 251         caddr_t  dummy_cb;
 252 #endif
 253 };
 254
 255 #define INP_PCBHASH(faddr, lport, fport, mask) \
 256         (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
 257 #define INP_PCBPORTHASH(lport, mask) \
 258         (ntohs((lport)) & (mask))
 259
 260 /* flags in inp_flags: */
 261 #define INP_RECVOPTS            0x01    /* receive incoming IP options */
 262 #define INP_RECVRETOPTS         0x02    /* receive IP options for reply */
 263 #define INP_RECVDSTADDR         0x04    /* receive IP dst address */
 264 #define INP_HDRINCL             0x08    /* user supplies entire IP header */
 265 #define INP_HIGHPORT            0x10    /* user wants "high" port binding */
 266 #define INP_LOWPORT             0x20    /* user wants "low" port binding */
 267 #define INP_ANONPORT            0x40    /* port chosen for user */
 268 #define INP_RECVIF              0x80    /* receive incoming interface */
 269 #define INP_MTUDISC             0x100   /* user can do MTU discovery */
 270 #ifdef __APPLE__
 271 #define INP_STRIPHDR    0x200   /* Strip headers in raw_ip, for OT support */
 272 #endif
 273 #define INP_FAITH               0x400   /* accept FAITH'ed connections */
 274
 275 #define IN6P_IPV6_V6ONLY        0x008000 /* restrict AF_INET6 socket for v6 */
 276
 277 #define IN6P_PKTINFO            0x010000 /* receive IP6 dst and I/F */
 278 #define IN6P_HOPLIMIT           0x020000 /* receive hoplimit */
 279 #define IN6P_HOPOPTS            0x040000 /* receive hop-by-hop options */
 280 #define IN6P_DSTOPTS            0x080000 /* receive dst options after rthdr */
 281 #define IN6P_RTHDR              0x100000 /* receive routing header */
 282 #define IN6P_RTHDRDSTOPTS       0x200000 /* receive dstoptions before rthdr */
 283 #define IN6P_AUTOFLOWLABEL      0x800000 /* attach flowlabel automatically */
 284 #define IN6P_BINDV6ONLY         0x10000000 /* do not grab IPv4 traffic */
 285
 286 #define INP_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
 287                                         INP_RECVIF|\
 288                                  IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
 289                                  IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
 290                                  IN6P_AUTOFLOWLABEL)
 291 #define INP_UNMAPPABLEOPTS      (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
 292                                  IN6P_AUTOFLOWLABEL)
 293
 294  /* for KAME src sync over BSD*'s */
 295 #define IN6P_HIGHPORT           INP_HIGHPORT
 296 #define IN6P_LOWPORT            INP_LOWPORT
 297 #define IN6P_ANONPORT           INP_ANONPORT
 298 #define IN6P_RECVIF             INP_RECVIF
 299 #define IN6P_MTUDISC            INP_MTUDISC
 300 #define IN6P_FAITH              INP_FAITH
 301 #define IN6P_CONTROLOPTS INP_CONTROLOPTS
 302         /*
 303          * socket AF version is {newer than,or include}
 304          * actual datagram AF version
 305          */
 306
 307 #define INPLOOKUP_WILDCARD      1
 308 #ifdef __APPLE__
 309 #define INPCB_ALL_OWNERS        0xff
 310 #define INPCB_NO_OWNER          0x0
 311 #define INPCB_OWNED_BY_X        0x80
 312 #define INPCB_MAX_IDS           7
 313 #endif
 314
 315 #define sotoinpcb(so)   ((struct inpcb *)(so)->so_pcb)
 316 #define sotoin6pcb(so)  sotoinpcb(so) /* for KAME src sync over BSD*'s */
 317
 318 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
 319
 320 #define INP_CHECK_SOCKAF(so, af)        (INP_SOCKAF(so) == af)
 321
 322 #ifdef KERNEL
 323 extern int      ipport_lowfirstauto;
 324 extern int      ipport_lowlastauto;
 325 extern int      ipport_firstauto;
 326 extern int      ipport_lastauto;
 327 extern int      ipport_hifirstauto;
 328 extern int      ipport_hilastauto;
 329
 330 void    in_pcbpurgeif0 __P((struct inpcb *, struct ifnet *));
 331 void    in_losing __P((struct inpcb *));
 332 void    in_rtchange __P((struct inpcb *, int));
 333 int     in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
 334 int     in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
 335 int     in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
 336 void    in_pcbdetach __P((struct inpcb *));
 337 void    in_pcbdisconnect __P((struct inpcb *));
 338 int     in_pcbinshash __P((struct inpcb *));
 339 int     in_pcbladdr __P((struct inpcb *, struct sockaddr *,
 340             struct sockaddr_in **));
 341 struct inpcb *
 342         in_pcblookup_local __P((struct inpcbinfo *,
 343             struct in_addr, u_int, int));
 344 struct inpcb *
 345         in_pcblookup_hash __P((struct inpcbinfo *,
 346                                struct in_addr, u_int, struct in_addr, u_int,
 347                                int, struct ifnet *));
 348 void    in_pcbnotifyall __P((struct inpcbhead *, struct in_addr,
 349             int, void (*)(struct inpcb *, int)));
 350 void    in_pcbrehash __P((struct inpcb *));
 351 int     in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
 352 int     in_setsockaddr __P((struct socket *so, struct sockaddr **nam));
 353
 354 #ifdef __APPLE__
 355 int
 356 in_pcb_grab_port  __P((struct inpcbinfo *pcbinfo,
 357                        u_short          options,
 358                        struct in_addr   laddr,
 359                        u_short          *lport,
 360                        struct in_addr   faddr,
 361                        u_short          fport,
 362                        u_int            cookie,
 363                        u_char           owner_id));
 364
 365 int
 366 in_pcb_letgo_port __P((struct inpcbinfo *pcbinfo,
 367                        struct in_addr laddr,
 368                        u_short lport,
 369                        struct in_addr faddr,
 370                        u_short fport, u_char owner_id));
 371
 372 u_char
 373 in_pcb_get_owner __P((struct inpcbinfo *pcbinfo,
 374                       struct in_addr laddr,
 375                       u_short lport,
 376                       struct in_addr faddr,
 377                       u_short fport,
 378                       u_int *cookie));
 379
 380 void in_pcb_nat_init(struct inpcbinfo *pcbinfo, int afamily, int pfamily,
 381                      int protocol);
 382
 383 int
 384 in_pcb_new_share_client(struct inpcbinfo *pcbinfo, u_char *owner_id);
 385
 386 int
 387 in_pcb_rem_share_client(struct inpcbinfo *pcbinfo, u_char owner_id);
 388 #endif /* __APPLE__ */
 389
 390 void    in_pcbremlists __P((struct inpcb *inp));
 391 #ifndef __APPLE__
 392 int     prison_xinpcb __P((struct proc *p, struct inpcb *inp));
 393 #endif
 394 #endif /* _KERNEL */
 395 #endif /* __APPLE_API_PRIVATE */
 396
 397 #endif /* !_NETINET_IN_PCB_H_ */