sys/netiso/iso_proto.c

   1 /*      $NetBSD: iso_proto.c,v 1.27 2008/04/23 09:57:59 plunky Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)iso_proto.c 8.2 (Berkeley) 2/9/95
  32  */
  33
  34 /***********************************************************
  35                 Copyright IBM Corporation 1987
  36
  37                       All Rights Reserved
  38
  39 Permission to use, copy, modify, and distribute this software and its
  40 documentation for any purpose and without fee is hereby granted,
  41 provided that the above copyright notice appear in all copies and that
  42 both that copyright notice and this permission notice appear in
  43 supporting documentation, and that the name of IBM not be
  44 used in advertising or publicity pertaining to distribution of the
  45 software without specific, written prior permission.
  46
  47 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  48 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  49 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  50 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  51 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  52 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  53 SOFTWARE.
  54
  55 ******************************************************************/
  56
  57 /*
  58  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
  59  */
  60 /*
  61  * iso_proto.c : protocol switch tables in the ISO domain
  62  *
  63  * ISO protocol family includes TP, CLTP, CLNP, 8208
  64  * TP and CLNP are implemented here.
  65  */
  66
  67 #include <sys/cdefs.h>
  68 __KERNEL_RCSID(0, "$NetBSD: iso_proto.c,v 1.27 2008/04/23 09:57:59 plunky Exp $");
  69
  70
  71 #include <sys/param.h>
  72 #include <sys/socket.h>
  73 #include <sys/protosw.h>
  74 #include <sys/domain.h>
  75 #include <sys/mbuf.h>
  76
  77 #include <net/radix.h>
  78
  79 #include <netiso/iso.h>
  80
  81 #include <netiso/clnp.h>
  82 #include <netiso/tp_param.h>
  83 #include <netiso/tp_var.h>
  84 #include <netiso/esis.h>
  85 #include <netiso/idrp_var.h>
  86 #include <netiso/iso_pcb.h>
  87 #include <netiso/cltp_var.h>
  88
  89 const int isoctlerrmap[PRC_NCMDS] = {
  90         0,              0,              0,              0,
  91         0,              EMSGSIZE,       EHOSTDOWN,      EHOSTUNREACH,
  92         EHOSTUNREACH,   EHOSTUNREACH,   ECONNREFUSED,   ECONNREFUSED,
  93         EMSGSIZE,       EHOSTUNREACH,   0,              0,
  94         0,              0,              0,              0,
  95         ENOPROTOOPT
  96 };
  97
  98 DOMAIN_DEFINE(isodomain);       /* forward declare and add to link set */
  99
 100 /* Wrappers to acquire kernel_lock. */
 101
 102 PR_WRAP_USRREQ(cltp_usrreq)
 103 PR_WRAP_USRREQ(clnp_usrreq)
 104 PR_WRAP_USRREQ(idrp_usrreq)
 105 PR_WRAP_USRREQ(tp_usrreq)
 106 PR_WRAP_USRREQ(esis_usrreq)
 107
 108 #define cltp_usrreq     cltp_usrreq_wrapper
 109 #define clnp_usrreq     clnp_usrreq_wrapper
 110 #define idrp_usrreq     idrp_usrreq_wrapper
 111 #define tp_usrreq       tp_usrreq_wrapper
 112 #define esis_usrreq     esis_usrreq_wrapper
 113
 114 PR_WRAP_CTLOUTPUT(rclnp_ctloutput)
 115 PR_WRAP_CTLOUTPUT(tp_ctloutput)
 116
 117 #define rclnp_ctloutput rclnp_ctloutput_wrapper
 118 #define tp_ctloutput    tp_ctloutput_wrapper
 119
 120 PR_WRAP_CTLINPUT(esis_ctlinput)
 121 PR_WRAP_CTLINPUT(tpclnp_ctlinput)
 122
 123 #define esis_ctlinput   esis_ctlinput_wrapper
 124 #define tpclnp_ctlinput tpclnp_ctlinput_wrapper
 125
 126 const struct protosw  isosw[] = {
 127         /*
 128          *  We need a datagram entry through which net mgmt programs can get
 129          *      to the iso_control procedure (iso ioctls). Thus, a minimal
 130          *      SOCK_DGRAM interface is provided here.
 131          *  THIS ONE MUST BE FIRST: Kludge city : socket() says if(!proto) call
 132          *  pffindtype, which gets the first entry that matches the type.
 133          *  sigh.
 134          */
 135         { .pr_type = SOCK_DGRAM,
 136           .pr_domain = &isodomain,
 137           .pr_protocol = ISOPROTO_CLTP,
 138           .pr_flags = PR_ATOMIC | PR_ADDR,
 139           .pr_input = 0,
 140           .pr_output = cltp_output,
 141           .pr_ctlinput = 0,
 142           .pr_ctloutput = 0,
 143           .pr_usrreq = cltp_usrreq,
 144           .pr_init = cltp_init,
 145           .pr_fasttimo = 0,
 146           .pr_slowtimo = 0,
 147           .pr_drain = 0
 148         },
 149
 150         /*
 151          *      A datagram interface for clnp cannot co-exist with TP/CLNP
 152          *  because CLNP has no way to discriminate incoming TP packets from
 153          *  packets coming in for any other higher layer protocol.
 154          *  Old way: set it up so that pffindproto(... dgm, clnp) fails.
 155          *  New way: let pffindproto work (for x.25, thank you) but create
 156          *      a clnp_usrreq() that returns error on PRU_ATTACH.
 157          */
 158         { .pr_type = SOCK_DGRAM,
 159           .pr_domain = &isodomain,
 160           .pr_protocol = ISOPROTO_CLNP,
 161           .pr_flags = 0,
 162           .pr_input = 0,
 163           .pr_output = clnp_output,
 164           .pr_ctlinput = 0,
 165           .pr_ctloutput = 0,
 166           .pr_usrreq = clnp_usrreq,
 167           .pr_init = clnp_init,
 168           .pr_fasttimo = 0,
 169           .pr_slowtimo = clnp_slowtimo,
 170           .pr_drain =  clnp_drain,
 171         },
 172
 173         /* raw clnp */
 174         { .pr_type = SOCK_RAW,
 175           .pr_domain = &isodomain,
 176           .pr_protocol = ISOPROTO_RAW,
 177           .pr_flags = PR_ATOMIC | PR_ADDR,
 178           .pr_input = rclnp_input,
 179           .pr_output = rclnp_output,
 180           .pr_ctlinput = 0,
 181           .pr_ctloutput = rclnp_ctloutput,
 182           .pr_usrreq = clnp_usrreq,
 183           .pr_init = 0,
 184           .pr_fasttimo = 0,
 185           .pr_slowtimo = 0,
 186           .pr_drain = 0
 187         },
 188
 189         /* ES-IS protocol */
 190         { .pr_type = SOCK_DGRAM,
 191           .pr_domain = &isodomain,
 192           .pr_protocol = ISOPROTO_ESIS,
 193           .pr_flags = PR_ATOMIC | PR_ADDR,
 194           .pr_input = esis_input,
 195           .pr_output = 0,
 196           .pr_ctlinput = esis_ctlinput,
 197           .pr_ctloutput = 0,
 198           .pr_usrreq = esis_usrreq,
 199           .pr_init = esis_init,
 200           .pr_fasttimo = 0,
 201           .pr_slowtimo = 0,
 202           .pr_drain = 0
 203         },
 204
 205         /* ISOPROTO_INTRAISIS */
 206         { .pr_type = SOCK_DGRAM,
 207           .pr_domain = &isodomain,
 208           .pr_protocol = ISOPROTO_INTRAISIS,
 209           .pr_flags = PR_ATOMIC | PR_ADDR,
 210           .pr_input = isis_input,
 211           .pr_output = 0,
 212           .pr_ctlinput = 0,
 213           .pr_ctloutput = 0,
 214           .pr_usrreq = esis_usrreq,
 215           .pr_init = 0,
 216           .pr_fasttimo = 0,
 217           .pr_slowtimo = 0,
 218           .pr_drain = 0
 219         },
 220
 221         /* ISOPROTO_IDRP */
 222         { .pr_type = SOCK_DGRAM,
 223           .pr_domain = &isodomain,
 224           .pr_protocol = ISOPROTO_IDRP,
 225           .pr_flags = PR_ATOMIC | PR_ADDR,
 226           .pr_input = idrp_input,
 227           .pr_output = 0,
 228           .pr_ctlinput = 0,
 229           .pr_ctloutput = 0,
 230           .pr_usrreq = idrp_usrreq,
 231           .pr_init = idrp_init,
 232           .pr_fasttimo = 0,
 233           .pr_slowtimo = 0,
 234           .pr_drain = 0
 235         },
 236
 237         /* ISOPROTO_TP */
 238         { .pr_type = SOCK_SEQPACKET,
 239           .pr_domain = &isodomain,
 240           .pr_protocol = ISOPROTO_TP,
 241           .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_LISTEN | PR_ABRTACPTDIS,
 242           .pr_input = tpclnp_input,
 243           .pr_output = 0,
 244           .pr_ctlinput = tpclnp_ctlinput,
 245           .pr_ctloutput = tp_ctloutput,
 246           .pr_usrreq = tp_usrreq,
 247           .pr_init = tp_init,
 248           .pr_fasttimo = tp_fasttimo,
 249           .pr_slowtimo = tp_slowtimo,
 250           .pr_drain = tp_drain,
 251         },
 252 };
 253
 254 extern struct ifqueue clnlintrq;
 255
 256 struct domain   isodomain = {
 257         .dom_family = PF_ISO,
 258         .dom_name = "iso-domain",
 259         .dom_init = NULL,
 260         .dom_externalize = NULL,
 261         .dom_dispose = NULL,
 262         .dom_protosw = isosw,
 263         .dom_protoswNPROTOSW = &isosw[sizeof(isosw) / sizeof(isosw[0])],
 264         .dom_rtattach = rn_inithead,            /* rtattach */
 265         .dom_rtoffset = 48,                     /* rtoffset */
 266         .dom_maxrtkey = sizeof(struct sockaddr_iso),    /* maxkeylen */
 267         .dom_ifattach = NULL,
 268         .dom_ifdetach = NULL,
 269         .dom_ifqueues = { &clnlintrq, NULL },           /* ifqueues */
 270         .dom_link = { NULL },
 271         .dom_mowner = MOWNER_INIT("",""),
 272         .dom_rtcache = LIST_HEAD_INITIALIZER(isodomain.dom_rtcache),
 273         .dom_sockaddr_cmp = sockaddr_iso_cmp
 274 };
 275
 276 int
 277 sockaddr_iso_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
 278 {
 279         int rc;
 280         uint_fast8_t len, nlen;
 281         const uint_fast8_t addrofs = offsetof(struct sockaddr_iso, siso_data);
 282         const struct sockaddr_iso *siso1, *siso2;
 283
 284         siso1 = satocsiso(sa1);
 285         siso2 = satocsiso(sa2);
 286
 287         len = MIN(siso1->siso_len, siso2->siso_len);
 288         /* No siso_nlen present? */
 289         if (len < addrofs)
 290                 return siso1->siso_len - siso2->siso_len;
 291
 292         nlen = MIN(siso1->siso_nlen, siso2->siso_nlen);
 293         if (nlen > addrofs &&
 294             (rc = memcmp(siso1->siso_data, siso2->siso_data, nlen)) != 0)
 295                 return rc;
 296
 297         return siso1->siso_nlen - siso2->siso_nlen;
 298 }