bsd/netat/drv_dep.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, 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 1994 Apple Computer, Inc.
  30  * All Rights Reserved.
  31  *
  32  * Tuyen A. Nguyen. (December 5, 1994)
  33  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  34  */
  35
  36 #include <sys/errno.h>
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <machine/spl.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/proc.h>
  43 #include <sys/filedesc.h>
  44 #include <sys/fcntl.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/malloc.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <sys/sockio.h>
  51
  52 #include <net/if.h>
  53 #include <net/if_types.h>
  54 #include <net/if_dl.h>
  55 #include <net/ethernet.h>
  56
  57 #include <netat/sysglue.h>
  58 #include <netat/appletalk.h>
  59 #include <netat/at_pcb.h>
  60 #include <netat/at_var.h>
  61 #include <netat/ddp.h>
  62 #include <netat/at_aarp.h>
  63 #include <netat/at_pat.h>
  64 #include <netat/debug.h>
  65
  66 #define DSAP_SNAP 0xaa
  67
  68 extern void gref_init(), atp_init(), atp_link(), atp_unlink();
  69
  70 extern int adspInited;
  71
  72 static llc_header_t     snap_hdr_at = SNAP_HDR_AT;
  73 static llc_header_t     snap_hdr_aarp = SNAP_HDR_AARP;
  74 static unsigned char snap_proto_ddp[5] = SNAP_PROTO_AT;
  75 static unsigned char snap_proto_aarp[5] = SNAP_PROTO_AARP;
  76
  77 static void at_input_packet(protocol_family_t protocol, mbuf_t m);
  78
  79 int pktsIn, pktsOut;
  80
  81 struct ifqueue atalkintrq;      /* appletalk and aarp packet input queue */
  82
  83 short appletalk_inited = 0;
  84
  85 extern atlock_t
  86         ddpall_lock, ddpinp_lock, arpinp_lock, refall_lock, nve_lock,
  87         aspall_lock, asptmo_lock, atpall_lock, atptmo_lock, atpgen_lock;
  88
  89 extern int (*sys_ATsocket )(), (*sys_ATgetmsg)(), (*sys_ATputmsg)();
  90 extern int (*sys_ATPsndreq)(), (*sys_ATPsndrsp)();
  91 extern int (*sys_ATPgetreq)(), (*sys_ATPgetrsp)();
  92
  93 void atalk_load()
  94 {
  95         extern int _ATsocket(), _ATgetmsg(), _ATputmsg();
  96         extern int _ATPsndreq(), _ATPsndrsp(), _ATPgetreq(), _ATPgetrsp();
  97         extern lck_mtx_t *domain_proto_mtx;
  98
  99         sys_ATsocket  = _ATsocket;
 100         sys_ATgetmsg  = _ATgetmsg;
 101         sys_ATputmsg  = _ATputmsg;
 102         sys_ATPsndreq = _ATPsndreq;
 103         sys_ATPsndrsp = _ATPsndrsp;
 104         sys_ATPgetreq = _ATPgetreq;
 105         sys_ATPgetrsp = _ATPgetrsp;
 106
 107         ATLOCKINIT(ddpall_lock);
 108         ATLOCKINIT(ddpinp_lock);
 109         ATLOCKINIT(arpinp_lock);
 110         ATLOCKINIT(refall_lock);
 111         ATLOCKINIT(aspall_lock);
 112         ATLOCKINIT(asptmo_lock);
 113         ATLOCKINIT(atpall_lock);
 114         ATLOCKINIT(atptmo_lock);
 115         ATLOCKINIT(atpgen_lock);
 116         ATLOCKINIT(nve_lock);
 117
 118         atp_init();
 119         atp_link();
 120         adspInited = 0;
 121
 122 /*      adsp_init();
 123                 for 2225395
 124                 this happens in adsp_open and is undone on ADSP_UNLINK
 125 */
 126         lck_mtx_unlock(domain_proto_mtx);
 127         proto_register_input(PF_APPLETALK, at_input_packet, NULL);
 128         lck_mtx_lock(domain_proto_mtx);
 129 } /* atalk_load */
 130
 131 /* Undo everything atalk_load() did. */
 132 void atalk_unload()  /* not currently used */
 133 {
 134         extern gbuf_t *scb_resource_m;
 135         extern gbuf_t *atp_resource_m;
 136
 137         sys_ATsocket  = 0;
 138         sys_ATgetmsg  = 0;
 139         sys_ATputmsg  = 0;
 140         sys_ATPsndreq = 0;
 141         sys_ATPsndrsp = 0;
 142         sys_ATPgetreq = 0;
 143         sys_ATPgetrsp = 0;
 144
 145         atp_unlink();
 146
 147 #ifdef NOT_YET
 148         if (scb_resource_m) {
 149                 gbuf_freem(scb_resource_m);
 150                 scb_resource_m = 0;
 151                 scb_free_list = 0;
 152         }
 153         /* allocated in atp_trans_alloc() */
 154         if (atp_resource_m) {
 155                 gbuf_freem(atp_resource_m);
 156                 atp_resource_m = 0;
 157                 atp_trans_free_list = 0;
 158         }
 159 #endif
 160
 161         appletalk_inited = 0;
 162 } /* atalk_unload */
 163
 164 void appletalk_hack_start()
 165 {
 166         if (!appletalk_inited) {
 167                 atalk_load();
 168                 atalkintrq.ifq_maxlen = IFQ_MAXLEN;
 169                 appletalk_inited = 1;
 170         }
 171 } /* appletalk_hack_start */
 172
 173 int pat_output(patp, mlist, dst_addr, type)
 174         at_ifaddr_t *patp;
 175         struct mbuf *mlist;                     /* packet chain */
 176         unsigned char *dst_addr;
 177         int     type;
 178 {
 179         struct mbuf *m, *m1;
 180         llc_header_t *llc_header;
 181         struct sockaddr dst;
 182
 183         if (! patp->aa_ifp) {
 184                 for (m = mlist; m; m = mlist) {
 185                         mlist = m->m_nextpkt;
 186                         m->m_nextpkt = 0;
 187                         m_freem(m);
 188                 }
 189                 return ENOTREADY;
 190         }
 191
 192         /* this is for ether_output */
 193         dst.sa_family = AF_APPLETALK;
 194         dst.sa_len = 2 + sizeof(struct etalk_addr);
 195         bcopy (dst_addr, &dst.sa_data[0], sizeof(struct etalk_addr));
 196
 197         /* packet chains are used on output and can be tested using aufs */
 198         for (m = mlist; m; m = mlist) {
 199                 mlist = m->m_nextpkt;
 200                 m->m_nextpkt = 0;
 201
 202                 M_PREPEND(m, sizeof(llc_header_t), M_DONTWAIT);
 203                 if (m == 0) {
 204                         continue;
 205                 }
 206
 207                 llc_header = mtod(m, llc_header_t *);
 208                 *llc_header =
 209                   (type == AARP_AT_TYPE) ? snap_hdr_aarp : snap_hdr_at;
 210
 211                 for (m->m_pkthdr.len = 0, m1 = m; m1; m1 = m1->m_next)
 212                         m->m_pkthdr.len += m1->m_len;
 213                 m->m_pkthdr.rcvif = 0;
 214
 215                 /* *** Note: AT is sending out mbufs of type MSG_DATA,
 216                    not MT_DATA.  *** */
 217 #ifdef APPLETALK_DEBUG
 218                 if (m->m_next &&
 219                     !((m->m_next)->m_flags & M_EXT))
 220                         kprintf("po: mlen= %d, m2len= %d\n", m->m_len,
 221                                 (m->m_next)->m_len);
 222 #endif
 223                 atalk_unlock();
 224                 dlil_output(patp->aa_ifp, PF_APPLETALK, m, NULL, &dst, 0);
 225                 atalk_lock();
 226
 227                 pktsOut++;
 228         }
 229
 230         return 0;
 231 } /* pat_output */
 232
 233 static void
 234 at_input_packet(
 235         __unused protocol_family_t      protocol,
 236         mbuf_t                                          m)
 237 {
 238         struct mbuf *m1;
 239         struct ifnet *ifp;
 240         llc_header_t *llc_header;
 241         at_ifaddr_t *ifID;
 242         char src[6];
 243         enet_header_t *enet_header;
 244
 245         if (!appletalk_inited) {
 246                 m_freem(m);
 247                 return;
 248         }
 249
 250         if ((m->m_flags & M_PKTHDR) == 0) {
 251 #ifdef APPLETALK_DEBUG
 252                 kprintf("atalkintr: no HDR on packet received");
 253 #endif
 254                 m_freem(m);
 255                 return;
 256         }
 257
 258           /* make sure the interface this packet was received on is configured
 259              for AppleTalk */
 260           ifp = m->m_pkthdr.rcvif;
 261           TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
 262                 if (ifID->aa_ifp && (ifID->aa_ifp == ifp))
 263                         break;
 264           }
 265           /* if we didn't find a matching interface */
 266           if (!ifID) {
 267                 m_freem(m);
 268                 return; /* was EAFNOSUPPORT */
 269           }
 270
 271           /* make sure the entire packet header is in the current mbuf */
 272           if (m->m_len < ENET_LLC_SIZE &&
 273               (m = m_pullup(m, ENET_LLC_SIZE)) == 0) {
 274 #ifdef APPLETALK_DEBUG
 275                 kprintf("atalkintr: packet too small\n");
 276 #endif
 277                 m_freem(m);
 278                 return;
 279           }
 280           enet_header = mtod(m, enet_header_t *);
 281
 282           /* Ignore multicast packets from local station */
 283           /* *** Note: code for IFTYPE_TOKENTALK may be needed here. *** */
 284           if (ifID->aa_ifp->if_type == IFT_ETHER ||
 285                 ifID->aa_ifp->if_type == IFT_L2VLAN ||
 286                 ifID->aa_ifp->if_type == IFT_IEEE8023ADLAG) {
 287                 bcopy((char *)enet_header->src, src, sizeof(src));
 288
 289 #ifdef COMMENT  /* In order to receive packets from the Blue Box, we cannot
 290                    reject packets whose source address matches our local address.
 291                 */
 292                 if ((enet_header->dst[0] & 1) &&
 293                     (bcmp(src, ifID->xaddr, sizeof(src)) == 0)) {
 294                   /* Packet rejected: think it's a local mcast. */
 295                   m_freem(m);
 296                   return; /* was EAFNOSUPPORT */
 297                 }
 298 #endif /* COMMENT */
 299
 300                 llc_header = (llc_header_t *)(enet_header+1);
 301
 302                 /* advance the mbuf pointers past the ethernet header */
 303                 m->m_data += ENET_LLC_SIZE;
 304                 m->m_len -= ENET_LLC_SIZE;
 305
 306                 pktsIn++;
 307
 308                 if (LLC_PROTO_EQUAL(llc_header->protocol,snap_proto_aarp)) {
 309                         (void)aarp_rcv_pkt(mtod(m, aarp_pkt_t *), ifID);
 310                         m_freem(m);
 311                 }
 312                 else if (LLC_PROTO_EQUAL(llc_header->protocol, snap_proto_ddp)) {
 313                         /* if we're a router take all pkts */
 314                         if (!ROUTING_MODE) {
 315                           if (aarp_chk_addr(mtod(m, at_ddp_t  *), ifID)
 316                               == AARP_ERR_NOT_OURS) {
 317 #ifdef APPLETALK_DEBUG
 318                             kprintf("pat_input: Packet Rejected: not for us? dest=%x.%x.%x.%x.%x.%x LLC_PROTO= %02x%02x\n",
 319                                     enet_header->dst[0], enet_header->dst[1],
 320                                     enet_header->dst[2], enet_header->dst[3],
 321                                     enet_header->dst[4], enet_header->dst[5],
 322                                     llc_header->protocol[3],
 323                                     llc_header->protocol[4]);
 324 #endif
 325                             m_freem(m);
 326                             return; /* was EAFNOSUPPORT */
 327                           }
 328                         }
 329                         MCHTYPE(m, MSG_DATA); /* set the mbuf type */
 330
 331                         ifID->stats.rcv_packets++;
 332                         for (m1 = m; m1; m1 = m1->m_next)
 333                                 ifID->stats.rcv_bytes += m1->m_len;
 334
 335                         if (!MULTIPORT_MODE)
 336                                 ddp_glean(m, ifID, src);
 337
 338                         ddp_input(m, ifID);
 339                 } else {
 340 #ifdef APPLETALK_DEBUG
 341                         kprintf("pat_input: Packet Rejected: wrong LLC_PROTO = %02x%02x\n",
 342                                 llc_header->protocol[3],
 343                                 llc_header->protocol[4]);
 344 #endif
 345                         m_freem(m);
 346                 }
 347         }
 348 }