sys/netinet/in_pcb.h

   1 /*
   2  * Copyright (c) 2004 Jeffrey M. Hsu.  All rights reserved.
   3  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Jeffrey M. Hsu.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of The DragonFly Project nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific, prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1982, 1986, 1990, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)in_pcb.h    8.1 (Berkeley) 6/10/93
  67  * $FreeBSD: src/sys/netinet/in_pcb.h,v 1.32.2.7 2003/01/24 05:11:34 sam Exp $
  68  * $DragonFly: src/sys/netinet/in_pcb.h,v 1.24 2008/09/04 09:08:22 hasso Exp $
  69  */
  70
  71 #ifndef _NETINET_IN_PCB_H_
  72 #define _NETINET_IN_PCB_H_
  73
  74 #ifndef _SYS_QUEUE_H_
  75 #include <sys/queue.h>
  76 #endif
  77 #ifndef _SYS_SYSCTL_H_
  78 #include <sys/sysctl.h>
  79 #endif
  80 #ifndef _NETINET_IN_H_
  81 #include <netinet/in.h>
  82 #endif
  83 #ifndef _NET_ROUTE_H_
  84 #include <net/route.h>
  85 #endif
  86
  87 #define in6pcb          inpcb   /* for KAME src sync over BSD*'s */
  88 #define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */
  89 struct inpcbpolicy;
  90
  91 /*
  92  * Common structure pcb for internet protocol implementation.
  93  * Here are stored pointers to local and foreign host table
  94  * entries, local and foreign socket numbers, and pointers
  95  * up (to a socket structure) and down (to a protocol-specific)
  96  * control block.
  97  */
  98 LIST_HEAD(inpcbhead, inpcb);
  99 LIST_HEAD(inpcbporthead, inpcbport);
 100 typedef u_quad_t        inp_gen_t;
 101
 102 struct inpcontainer {
 103         struct inpcb                    *ic_inp;
 104         LIST_ENTRY(inpcontainer)        ic_list;
 105 };
 106 LIST_HEAD(inpcontainerhead, inpcontainer);
 107
 108 /*
 109  * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
 110  * So, AF_INET6 null laddr is also used as AF_INET null laddr,
 111  * by utilize following structure. (At last, same as INRIA)
 112  */
 113 struct in_addr_4in6 {
 114         u_int32_t       ia46_pad32[3];
 115         struct  in_addr ia46_addr4;
 116 };
 117
 118 /*
 119  * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553.
 120  * in_conninfo has some extra padding to accomplish this.
 121  */
 122 struct in_endpoints {
 123         u_int16_t       ie_fport;               /* foreign port */
 124         u_int16_t       ie_lport;               /* local port */
 125         /* protocol dependent part, local and foreign addr */
 126         union {
 127                 /* foreign host table entry */
 128                 struct  in_addr_4in6 ie46_foreign;
 129                 struct  in6_addr ie6_foreign;
 130         } ie_dependfaddr;
 131         union {
 132                 /* local host table entry */
 133                 struct  in_addr_4in6 ie46_local;
 134                 struct  in6_addr ie6_local;
 135         } ie_dependladdr;
 136 #define ie_faddr        ie_dependfaddr.ie46_foreign.ia46_addr4
 137 #define ie_laddr        ie_dependladdr.ie46_local.ia46_addr4
 138 #define ie6_faddr       ie_dependfaddr.ie6_foreign
 139 #define ie6_laddr       ie_dependladdr.ie6_local
 140 };
 141
 142 /*
 143  * XXX
 144  * At some point struct route should possibly change to:
 145  *   struct rtentry *rt
 146  *   struct in_endpoints *ie;
 147  */
 148 struct in_conninfo {
 149         u_int8_t        inc_flags;
 150         u_int8_t        inc_len;
 151         u_int16_t       inc_pad;        /* XXX alignment for in_endpoints */
 152         /* protocol dependent part; cached route */
 153         struct  in_endpoints inc_ie;
 154         union {
 155                 /* placeholder for routing entry */
 156                 struct  route inc4_route;
 157                 struct  route_in6 inc6_route;
 158         } inc_dependroute;
 159 };
 160 #define inc_isipv6      inc_flags       /* temp compatibility */
 161 #define inc_fport       inc_ie.ie_fport
 162 #define inc_lport       inc_ie.ie_lport
 163 #define inc_faddr       inc_ie.ie_faddr
 164 #define inc_laddr       inc_ie.ie_laddr
 165 #define inc_route       inc_dependroute.inc4_route
 166 #define inc6_faddr      inc_ie.ie6_faddr
 167 #define inc6_laddr      inc_ie.ie6_laddr
 168 #define inc6_route      inc_dependroute.inc6_route
 169
 170 /*
 171  * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
 172  * of the structure.  Therefore, it is important that the members in
 173  * that position not contain any information which is required to be
 174  * stable.
 175  */
 176 struct  icmp6_filter;
 177
 178 struct inpcb {
 179         LIST_ENTRY(inpcb) inp_hash; /* hash list */
 180         LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
 181         u_int32_t       inp_flow;
 182
 183         /* local and foreign ports, local and foreign addr */
 184         struct  in_conninfo inp_inc;
 185
 186         void    *inp_ppcb;              /* pointer to per-protocol pcb */
 187         struct  inpcbinfo *inp_pcbinfo; /* PCB list info */
 188         struct  inpcbinfo *inp_cpcbinfo;/* back pointer for connection table */
 189         struct  socket *inp_socket;     /* back pointer to socket */
 190                                         /* list for this PCB's local port */
 191         int     inp_flags;              /* generic IP/datagram flags */
 192
 193         struct  inpcbpolicy *inp_sp; /* for IPSEC */
 194         u_char  inp_vflag;
 195 #define INP_IPV4        0x1
 196 #define INP_IPV6        0x2
 197         u_char  inp_ip_ttl;             /* time to live proto */
 198         u_char  inp_ip_p;               /* protocol proto */
 199         u_char  inp_ip_minttl;          /* minimum TTL or drop */
 200
 201         /* protocol dependent part; options */
 202         struct {
 203                 u_char  inp4_ip_tos;            /* type of service proto */
 204                 struct  mbuf *inp4_options;     /* IP options */
 205                 struct  ip_moptions *inp4_moptions; /* IP multicast options */
 206         } inp_depend4;
 207 #define inp_fport       inp_inc.inc_fport
 208 #define inp_lport       inp_inc.inc_lport
 209 #define inp_faddr       inp_inc.inc_faddr
 210 #define inp_laddr       inp_inc.inc_laddr
 211 #define inp_route       inp_inc.inc_route
 212 #define inp_ip_tos      inp_depend4.inp4_ip_tos
 213 #define inp_options     inp_depend4.inp4_options
 214 #define inp_moptions    inp_depend4.inp4_moptions
 215         struct {
 216                 /* IP options */
 217                 struct  mbuf *inp6_options;
 218                 /* IP6 options for outgoing packets */
 219                 struct  ip6_pktopts *inp6_outputopts;
 220                 /* IP multicast options */
 221                 struct  ip6_moptions *inp6_moptions;
 222                 /* ICMPv6 code type filter */
 223                 struct  icmp6_filter *inp6_icmp6filt;
 224                 /* IPV6_CHECKSUM setsockopt */
 225                 int     inp6_cksum;
 226                 u_short inp6_ifindex;
 227                 short   inp6_hops;
 228                 u_int8_t        inp6_hlim;
 229         } inp_depend6;
 230         LIST_ENTRY(inpcb) inp_portlist;
 231         struct  inpcbport *inp_phd;     /* head of this list */
 232         inp_gen_t       inp_gencnt;     /* generation count of this instance */
 233 #define in6p_faddr      inp_inc.inc6_faddr
 234 #define in6p_laddr      inp_inc.inc6_laddr
 235 #define in6p_route      inp_inc.inc6_route
 236 #define in6p_ip6_hlim   inp_depend6.inp6_hlim
 237 #define in6p_hops       inp_depend6.inp6_hops   /* default hop limit */
 238 #define in6p_ip6_nxt    inp_ip_p
 239 #define in6p_flowinfo   inp_flow
 240 #define in6p_vflag      inp_vflag
 241 #define in6p_options    inp_depend6.inp6_options
 242 #define in6p_outputopts inp_depend6.inp6_outputopts
 243 #define in6p_moptions   inp_depend6.inp6_moptions
 244 #define in6p_icmp6filt  inp_depend6.inp6_icmp6filt
 245 #define in6p_cksum      inp_depend6.inp6_cksum
 246 #define inp6_ifindex    inp_depend6.inp6_ifindex
 247 #define in6p_flags      inp_flags  /* for KAME src sync over BSD*'s */
 248 #define in6p_socket     inp_socket  /* for KAME src sync over BSD*'s */
 249 #define in6p_lport      inp_lport  /* for KAME src sync over BSD*'s */
 250 #define in6p_fport      inp_fport  /* for KAME src sync over BSD*'s */
 251 #define in6p_ppcb       inp_ppcb  /* for KAME src sync over BSD*'s */
 252 };
 253 /*
 254  * The range of the generation count, as used in this implementation,
 255  * is 9e19.  We would have to create 300 billion connections per
 256  * second for this number to roll over in a year.  This seems sufficiently
 257  * unlikely that we simply don't concern ourselves with that possibility.
 258  */
 259
 260 /*
 261  * Interface exported to userland by various protocols which use
 262  * inpcbs.  Hack alert -- only define if struct xsocket is in scope.
 263  */
 264 #ifdef _SYS_SOCKETVAR_H_
 265 struct  xinpcb {
 266         size_t  xi_len;         /* length of this structure */
 267         struct  inpcb xi_inp;
 268         struct  xsocket xi_socket;
 269         u_quad_t        xi_alignment_hack;
 270 };
 271 #endif /* _SYS_SOCKETVAR_H_ */
 272
 273 struct inpcbport {
 274         LIST_ENTRY(inpcbport) phd_hash;
 275         struct inpcbhead phd_pcblist;
 276         u_short phd_port;
 277 };
 278
 279 struct inpcbinfo {              /* XXX documentation, prefixes */
 280         struct  inpcbhead *hashbase;
 281         u_long  hashmask;
 282         struct  inpcbporthead *porthashbase;
 283         u_long  porthashmask;
 284         struct  inpcontainerhead *wildcardhashbase;
 285         u_long  wildcardhashmask;
 286         struct  inpcbhead pcblisthead;  /* head of queue of active pcb's */
 287         u_short lastport;
 288         u_short lastlow;
 289         u_short lasthi;
 290         struct  vm_zone *ipi_zone; /* zone to allocate pcbs from */
 291         u_int   ipi_count;      /* number of pcbs in this list */
 292         u_quad_t ipi_gencnt;    /* current generation count */
 293         int     cpu;            /* related protocol thread cpu or -1 */
 294 };
 295
 296
 297 #define INP_PCBCONNHASH(faddr, fport, laddr, lport, mask)               \
 298     (((faddr) ^ ((faddr) >> 16) ^ (laddr) ^ ntohs((lport) ^ (fport))) & (mask))
 299
 300 #define INP_PCBPORTHASH(lport, mask)            (ntohs(lport) & (mask))
 301
 302 #define INP_PCBWILDCARDHASH(lport, mask)        (ntohs(lport) & (mask))
 303
 304 /* flags in inp_flags: */
 305 #define INP_RECVOPTS            0x01    /* receive incoming IP options */
 306 #define INP_RECVRETOPTS         0x02    /* receive IP options for reply */
 307 #define INP_RECVDSTADDR         0x04    /* receive IP dst address */
 308 #define INP_HDRINCL             0x08    /* user supplies entire IP header */
 309 #define INP_HIGHPORT            0x10    /* user wants "high" port binding */
 310 #define INP_LOWPORT             0x20    /* user wants "low" port binding */
 311 #define INP_ANONPORT            0x40    /* port chosen for user */
 312 #define INP_RECVIF              0x80    /* receive incoming interface */
 313 #define INP_MTUDISC             0x100   /* user can do MTU discovery */
 314 #define INP_FAITH               0x200   /* accept FAITH'ed connections */
 315 #define INP_WILDCARD            0x400   /* wildcard match */
 316 #define INP_WILDCARD_MP         0x800   /* distributed wildcard match */
 317 #define INP_CONNECTED           0x1000  /* exact match */
 318 #define INP_WASBOUND_NOTANY     0x2000  /* was bound to non-null laddr */
 319 #define INP_PLACEMARKER         0x4000  /* skip this pcb, its a placemarker */
 320
 321 #define IN6P_IPV6_V6ONLY        0x008000 /* restrict AF_INET6 socket for v6 */
 322
 323 #define IN6P_PKTINFO            0x010000 /* receive IP6 dst and I/F */
 324 #define IN6P_HOPLIMIT           0x020000 /* receive hoplimit */
 325 #define IN6P_HOPOPTS            0x040000 /* receive hop-by-hop options */
 326 #define IN6P_DSTOPTS            0x080000 /* receive dst options after rthdr */
 327 #define IN6P_RTHDR              0x100000 /* receive routing header */
 328 #define IN6P_RTHDRDSTOPTS       0x200000 /* receive dstoptions before rthdr */
 329 #define IN6P_AUTOFLOWLABEL      0x800000 /* attach flowlabel automatically */
 330 /*
 331  * RFC3542 Definition
 332  */
 333 #define IN6P_TCLASS             0x400000 /* receive traffic class value */
 334 #define IN6P_RFC2292            0x40000000 /* used RFC2292 API on the socket */
 335 #define IN6P_MTU                0x80000000 /* receive path MTU */
 336
 337 #define INP_RECVTTL             0x80000000 /* receive incoming IP TTL */
 338
 339 #define INP_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
 340                                  INP_RECVIF|INP_RECVTTL|\
 341                                  IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
 342                                  IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
 343                                  IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
 344                                  IN6P_MTU)
 345
 346 #define INP_UNMAPPABLEOPTS      (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
 347                                  IN6P_TCLASS|IN6P_AUTOFLOWLABEL)
 348
 349  /* for KAME src sync over BSD*'s */
 350 #define IN6P_HIGHPORT           INP_HIGHPORT
 351 #define IN6P_LOWPORT            INP_LOWPORT
 352 #define IN6P_ANONPORT           INP_ANONPORT
 353 #define IN6P_RECVIF             INP_RECVIF
 354 #define IN6P_MTUDISC            INP_MTUDISC
 355 #define IN6P_FAITH              INP_FAITH
 356 #define IN6P_CONTROLOPTS INP_CONTROLOPTS
 357         /*
 358          * socket AF version is {newer than,or include}
 359          * actual datagram AF version
 360          */
 361
 362 #define INPLOOKUP_WILDCARD      1
 363 #define sotoinpcb(so)   ((struct inpcb *)(so)->so_pcb)
 364 #define sotoin6pcb(so)  sotoinpcb(so) /* for KAME src sync over BSD*'s */
 365
 366 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
 367
 368 #define INP_CHECK_SOCKAF(so, af)        (INP_SOCKAF(so) == af)
 369
 370 #ifdef _KERNEL
 371 extern int      ipport_lowfirstauto;
 372 extern int      ipport_lowlastauto;
 373 extern int      ipport_firstauto;
 374 extern int      ipport_lastauto;
 375 extern int      ipport_hifirstauto;
 376 extern int      ipport_hilastauto;
 377
 378 void    in_pcbpurgeif0 (struct inpcb *, struct ifnet *);
 379 void    in_losing (struct inpcb *);
 380 void    in_rtchange (struct inpcb *, int);
 381 void    in_pcbinfo_init (struct inpcbinfo *);
 382 int     in_pcballoc (struct socket *, struct inpcbinfo *);
 383 int     in_pcbbind (struct inpcb *, struct sockaddr *, struct thread *);
 384 int     in_pcbconnect (struct inpcb *, struct sockaddr *, struct thread *);
 385 void    in_pcbdetach (struct inpcb *);
 386 void    in_pcbdisconnect (struct inpcb *);
 387 void    in_pcbinswildcardhash(struct inpcb *inp);
 388 void    in_pcbinswildcardhash_oncpu(struct inpcb *, struct inpcbinfo *);
 389 void    in_pcbinsconnhash(struct inpcb *inp);
 390 int     in_pcbinsporthash (struct inpcb *);
 391 int     in_pcbladdr (struct inpcb *, struct sockaddr *,
 392             struct sockaddr_in **, struct thread *);
 393 struct inpcb *
 394         in_pcblookup_local (struct inpcbinfo *, struct in_addr, u_int, int,
 395                             struct ucred *);
 396 struct inpcb *
 397         in_pcblookup_hash (struct inpcbinfo *,
 398                                struct in_addr, u_int, struct in_addr, u_int,
 399                                int, struct ifnet *);
 400 void    in_pcbnotifyall (struct inpcbhead *, struct in_addr,
 401             int, void (*)(struct inpcb *, int));
 402 int     in_setpeeraddr (struct socket *so, struct sockaddr **nam);
 403 int     in_setsockaddr (struct socket *so, struct sockaddr **nam);
 404 void    in_pcbremwildcardhash(struct inpcb *inp);
 405 void    in_pcbremwildcardhash_oncpu(struct inpcb *, struct inpcbinfo *);
 406 void    in_pcbremconnhash(struct inpcb *inp);
 407 void    in_pcbremlists (struct inpcb *inp);
 408 int     prison_xinpcb (struct thread *p, struct inpcb *inp);
 409
 410 int     in_pcblist_global(SYSCTL_HANDLER_ARGS);
 411 #endif /* _KERNEL */
 412
 413 #endif /* !_NETINET_IN_PCB_H_ */