bsd/netat/drv_dep.c

   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 1994 Apple Computer, Inc.
  24  * All Rights Reserved.
  25  *
  26  * Tuyen A. Nguyen. (December 5, 1994)
  27  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  28  */
  29
  30 #include <sys/errno.h>
  31 #include <sys/types.h>
  32 #include <sys/param.h>
  33 #include <machine/spl.h>
  34 #include <sys/systm.h>
  35 #include <sys/kernel.h>
  36 #include <sys/proc.h>
  37 #include <sys/filedesc.h>
  38 #include <sys/fcntl.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/malloc.h>
  42 #include <sys/socket.h>
  43 #include <sys/socketvar.h>
  44 #include <sys/sockio.h>
  45
  46 #include <net/if.h>
  47 #include <net/if_types.h>
  48 #include <net/if_dl.h>
  49 #include <net/etherdefs.h>
  50 #include <net/ethernet.h>
  51 #include <net/tokendefs.h>
  52
  53 #include <netat/sysglue.h>
  54 #include <netat/appletalk.h>
  55 #include <netat/at_pcb.h>
  56 #include <netat/at_var.h>
  57 #include <netat/ddp.h>
  58 #include <netat/at_aarp.h>
  59 #include <netat/at_pat.h>
  60 #include <netat/debug.h>
  61
  62 #define DSAP_SNAP 0xaa
  63
  64 extern void gref_init(), atp_init(), atp_link(), atp_unlink();
  65
  66 extern int adspInited;
  67
  68 static llc_header_t     snap_hdr_at = SNAP_HDR_AT;
  69 static llc_header_t     snap_hdr_aarp = SNAP_HDR_AARP;
  70 static unsigned char snap_proto_ddp[5] = SNAP_PROTO_AT;
  71 static unsigned char snap_proto_aarp[5] = SNAP_PROTO_AARP;
  72
  73 int pktsIn, pktsOut;
  74
  75 struct ifqueue atalkintrq;      /* appletalk and aarp packet input queue */
  76
  77 short appletalk_inited = 0;
  78
  79 extern atlock_t
  80         ddpall_lock, ddpinp_lock, arpinp_lock, refall_lock, nve_lock,
  81         aspall_lock, asptmo_lock, atpall_lock, atptmo_lock, atpgen_lock;
  82
  83 extern int (*sys_ATsocket )(), (*sys_ATgetmsg)(), (*sys_ATputmsg)();
  84 extern int (*sys_ATPsndreq)(), (*sys_ATPsndrsp)();
  85 extern int (*sys_ATPgetreq)(), (*sys_ATPgetrsp)();
  86
  87 void atalk_load()
  88 {
  89         extern int _ATsocket(), _ATgetmsg(), _ATputmsg();
  90         extern int _ATPsndreq(), _ATPsndrsp(), _ATPgetreq(), _ATPgetrsp();
  91
  92         sys_ATsocket  = _ATsocket;
  93         sys_ATgetmsg  = _ATgetmsg;
  94         sys_ATputmsg  = _ATputmsg;
  95         sys_ATPsndreq = _ATPsndreq;
  96         sys_ATPsndrsp = _ATPsndrsp;
  97         sys_ATPgetreq = _ATPgetreq;
  98         sys_ATPgetrsp = _ATPgetrsp;
  99
 100         ATLOCKINIT(ddpall_lock);
 101         ATLOCKINIT(ddpinp_lock);
 102         ATLOCKINIT(arpinp_lock);
 103         ATLOCKINIT(refall_lock);
 104         ATLOCKINIT(aspall_lock);
 105         ATLOCKINIT(asptmo_lock);
 106         ATLOCKINIT(atpall_lock);
 107         ATLOCKINIT(atptmo_lock);
 108         ATLOCKINIT(atpgen_lock);
 109         ATLOCKINIT(nve_lock);
 110
 111         atp_init();
 112         atp_link();
 113         adspInited = 0;
 114
 115 /*      adsp_init();
 116                 for 2225395
 117                 this happens in adsp_open and is undone on ADSP_UNLINK
 118 */
 119 } /* atalk_load */
 120
 121 /* Undo everything atalk_load() did. */
 122 void atalk_unload()  /* not currently used */
 123 {
 124         extern gbuf_t *scb_resource_m;
 125         extern gbuf_t *atp_resource_m;
 126
 127         sys_ATsocket  = 0;
 128         sys_ATgetmsg  = 0;
 129         sys_ATputmsg  = 0;
 130         sys_ATPsndreq = 0;
 131         sys_ATPsndrsp = 0;
 132         sys_ATPgetreq = 0;
 133         sys_ATPgetrsp = 0;
 134
 135         atp_unlink();
 136
 137 #ifdef NOT_YET
 138         if (scb_resource_m) {
 139                 gbuf_freem(scb_resource_m);
 140                 scb_resource_m = 0;
 141                 scb_free_list = 0;
 142         }
 143         /* allocated in atp_trans_alloc() */
 144         if (atp_resource_m) {
 145                 gbuf_freem(atp_resource_m);
 146                 atp_resource_m = 0;
 147                 atp_trans_free_list = 0;
 148         }
 149 #endif
 150
 151         appletalk_inited = 0;
 152 } /* atalk_unload */
 153
 154 void appletalk_hack_start()
 155 {
 156         if (!appletalk_inited) {
 157                 atalk_load();
 158                 atalkintrq.ifq_maxlen = IFQ_MAXLEN;
 159                 appletalk_inited = 1;
 160         }
 161 } /* appletalk_hack_start */
 162
 163 int pat_output(patp, mlist, dst_addr, type)
 164         at_ifaddr_t *patp;
 165         struct mbuf *mlist;                     /* packet chain */
 166         unsigned char *dst_addr;
 167         int     type;
 168 {
 169         struct mbuf *m, *m1;
 170         llc_header_t *llc_header;
 171         struct sockaddr dst;
 172
 173         if (! patp->aa_ifp) {
 174                 for (m = mlist; m; m = mlist) {
 175                         mlist = m->m_nextpkt;
 176                         m->m_nextpkt = 0;
 177                         m_freem(m);
 178                 }
 179                 return ENOTREADY;
 180         }
 181
 182         /* this is for ether_output */
 183         dst.sa_family = AF_APPLETALK;
 184         dst.sa_len = 2 + sizeof(struct etalk_addr);
 185         bcopy (dst_addr, &dst.sa_data[0], sizeof(struct etalk_addr));
 186
 187         /* packet chains are used on output and can be tested using aufs */
 188         for (m = mlist; m; m = mlist) {
 189                 mlist = m->m_nextpkt;
 190                 m->m_nextpkt = 0;
 191
 192                 M_PREPEND(m, sizeof(llc_header_t), M_DONTWAIT)
 193                 if (m == 0) {
 194                         continue;
 195                 }
 196
 197                 llc_header = mtod(m, llc_header_t *);
 198                 *llc_header =
 199                   (type == AARP_AT_TYPE) ? snap_hdr_aarp : snap_hdr_at;
 200
 201                 for (m->m_pkthdr.len = 0, m1 = m; m1; m1 = m1->m_next)
 202                         m->m_pkthdr.len += m1->m_len;
 203                 m->m_pkthdr.rcvif = 0;
 204
 205                 /* *** Note: AT is sending out mbufs of type MSG_DATA,
 206                    not MT_DATA.  *** */
 207 #ifdef APPLETALK_DEBUG
 208                 if (m->m_next &&
 209                     !((m->m_next)->m_flags & M_EXT))
 210                         kprintf("po: mlen= %d, m2len= %d\n", m->m_len,
 211                                 (m->m_next)->m_len);
 212 #endif
 213                 dlil_output(patp->at_dl_tag, m, NULL, &dst, 0);
 214
 215                 pktsOut++;
 216         }
 217
 218         return 0;
 219 } /* pat_output */
 220
 221 void atalkintr()
 222 {
 223         struct mbuf *m, *m1, *mlist = NULL;
 224         struct ifnet *ifp;
 225         int s;
 226         llc_header_t *llc_header;
 227         at_ifaddr_t *ifID;
 228         char src[6];
 229         enet_header_t *enet_header;
 230
 231 next:
 232         s = splimp();
 233         IF_DEQUEUE(&atalkintrq, m);
 234         splx(s);
 235
 236         if (m == 0)
 237                 return;
 238
 239         for ( ; m ; m = mlist) {
 240           mlist = m->m_nextpkt;
 241 #ifdef APPLETALK_DEBUG
 242           /* packet chains are not yet in use on input */
 243           if (mlist) kprintf("atalkintr: packet chain\n");
 244 #endif
 245           m->m_nextpkt = 0;
 246
 247           if (!appletalk_inited) {
 248                 m_freem(m);
 249                 continue;
 250           }
 251
 252           if ((m->m_flags & M_PKTHDR) == 0) {
 253 #ifdef APPLETALK_DEBUG
 254                 kprintf("atalkintr: no HDR on packet received");
 255 #endif
 256                 m_freem(m);
 257                 continue;
 258           }
 259
 260           /* make sure the interface this packet was received on is configured
 261              for AppleTalk */
 262           ifp = m->m_pkthdr.rcvif;
 263           TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
 264                 if (ifID->aa_ifp && (ifID->aa_ifp == ifp))
 265                         break;
 266           }
 267           /* if we didn't find a matching interface */
 268           if (!ifID) {
 269                 m_freem(m);
 270                 continue; /* was EAFNOSUPPORT */
 271           }
 272
 273           /* make sure the entire packet header is in the current mbuf */
 274           if (m->m_len < ENET_LLC_SIZE &&
 275               (m = m_pullup(m, ENET_LLC_SIZE)) == 0) {
 276 #ifdef APPLETALK_DEBUG
 277                 kprintf("atalkintr: packet too small\n");
 278 #endif
 279                 m_freem(m);
 280                 continue;
 281           }
 282           enet_header = mtod(m, enet_header_t *);
 283
 284           /* Ignore multicast packets from local station */
 285           /* *** Note: code for IFTYPE_TOKENTALK may be needed here. *** */
 286           if (ifID->aa_ifp->if_type == IFT_ETHER) {
 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                   continue; /* 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                             continue; /* 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         }
 349         goto next;
 350 } /* atalkintr */