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/ethernet.h>
  50
  51 #include <netat/sysglue.h>
  52 #include <netat/appletalk.h>
  53 #include <netat/at_pcb.h>
  54 #include <netat/at_var.h>
  55 #include <netat/ddp.h>
  56 #include <netat/at_aarp.h>
  57 #include <netat/at_pat.h>
  58 #include <netat/debug.h>
  59
  60 #define DSAP_SNAP 0xaa
  61
  62 extern void gref_init(), atp_init(), atp_link(), atp_unlink();
  63
  64 extern int adspInited;
  65
  66 static llc_header_t     snap_hdr_at = SNAP_HDR_AT;
  67 static llc_header_t     snap_hdr_aarp = SNAP_HDR_AARP;
  68 static unsigned char snap_proto_ddp[5] = SNAP_PROTO_AT;
  69 static unsigned char snap_proto_aarp[5] = SNAP_PROTO_AARP;
  70
  71 int pktsIn, pktsOut;
  72
  73 struct ifqueue atalkintrq;      /* appletalk and aarp packet input queue */
  74
  75 short appletalk_inited = 0;
  76
  77 extern atlock_t
  78         ddpall_lock, ddpinp_lock, arpinp_lock, refall_lock, nve_lock,
  79         aspall_lock, asptmo_lock, atpall_lock, atptmo_lock, atpgen_lock;
  80
  81 extern int (*sys_ATsocket )(), (*sys_ATgetmsg)(), (*sys_ATputmsg)();
  82 extern int (*sys_ATPsndreq)(), (*sys_ATPsndrsp)();
  83 extern int (*sys_ATPgetreq)(), (*sys_ATPgetrsp)();
  84
  85 void atalk_load()
  86 {
  87         extern int _ATsocket(), _ATgetmsg(), _ATputmsg();
  88         extern int _ATPsndreq(), _ATPsndrsp(), _ATPgetreq(), _ATPgetrsp();
  89
  90         sys_ATsocket  = _ATsocket;
  91         sys_ATgetmsg  = _ATgetmsg;
  92         sys_ATputmsg  = _ATputmsg;
  93         sys_ATPsndreq = _ATPsndreq;
  94         sys_ATPsndrsp = _ATPsndrsp;
  95         sys_ATPgetreq = _ATPgetreq;
  96         sys_ATPgetrsp = _ATPgetrsp;
  97
  98         ATLOCKINIT(ddpall_lock);
  99         ATLOCKINIT(ddpinp_lock);
 100         ATLOCKINIT(arpinp_lock);
 101         ATLOCKINIT(refall_lock);
 102         ATLOCKINIT(aspall_lock);
 103         ATLOCKINIT(asptmo_lock);
 104         ATLOCKINIT(atpall_lock);
 105         ATLOCKINIT(atptmo_lock);
 106         ATLOCKINIT(atpgen_lock);
 107         ATLOCKINIT(nve_lock);
 108
 109         atp_init();
 110         atp_link();
 111         adspInited = 0;
 112
 113 /*      adsp_init();
 114                 for 2225395
 115                 this happens in adsp_open and is undone on ADSP_UNLINK
 116 */
 117 } /* atalk_load */
 118
 119 /* Undo everything atalk_load() did. */
 120 void atalk_unload()  /* not currently used */
 121 {
 122         extern gbuf_t *scb_resource_m;
 123         extern gbuf_t *atp_resource_m;
 124
 125         sys_ATsocket  = 0;
 126         sys_ATgetmsg  = 0;
 127         sys_ATputmsg  = 0;
 128         sys_ATPsndreq = 0;
 129         sys_ATPsndrsp = 0;
 130         sys_ATPgetreq = 0;
 131         sys_ATPgetrsp = 0;
 132
 133         atp_unlink();
 134
 135 #ifdef NOT_YET
 136         if (scb_resource_m) {
 137                 gbuf_freem(scb_resource_m);
 138                 scb_resource_m = 0;
 139                 scb_free_list = 0;
 140         }
 141         /* allocated in atp_trans_alloc() */
 142         if (atp_resource_m) {
 143                 gbuf_freem(atp_resource_m);
 144                 atp_resource_m = 0;
 145                 atp_trans_free_list = 0;
 146         }
 147 #endif
 148
 149         appletalk_inited = 0;
 150 } /* atalk_unload */
 151
 152 void appletalk_hack_start()
 153 {
 154         if (!appletalk_inited) {
 155                 atalk_load();
 156                 atalkintrq.ifq_maxlen = IFQ_MAXLEN;
 157                 appletalk_inited = 1;
 158         }
 159 } /* appletalk_hack_start */
 160
 161 int pat_output(patp, mlist, dst_addr, type)
 162         at_ifaddr_t *patp;
 163         struct mbuf *mlist;                     /* packet chain */
 164         unsigned char *dst_addr;
 165         int     type;
 166 {
 167         struct mbuf *m, *m1;
 168         llc_header_t *llc_header;
 169         struct sockaddr dst;
 170
 171         if (! patp->aa_ifp) {
 172                 for (m = mlist; m; m = mlist) {
 173                         mlist = m->m_nextpkt;
 174                         m->m_nextpkt = 0;
 175                         m_freem(m);
 176                 }
 177                 return ENOTREADY;
 178         }
 179
 180         /* this is for ether_output */
 181         dst.sa_family = AF_APPLETALK;
 182         dst.sa_len = 2 + sizeof(struct etalk_addr);
 183         bcopy (dst_addr, &dst.sa_data[0], sizeof(struct etalk_addr));
 184
 185         /* packet chains are used on output and can be tested using aufs */
 186         for (m = mlist; m; m = mlist) {
 187                 mlist = m->m_nextpkt;
 188                 m->m_nextpkt = 0;
 189
 190                 M_PREPEND(m, sizeof(llc_header_t), M_DONTWAIT);
 191                 if (m == 0) {
 192                         continue;
 193                 }
 194
 195                 llc_header = mtod(m, llc_header_t *);
 196                 *llc_header =
 197                   (type == AARP_AT_TYPE) ? snap_hdr_aarp : snap_hdr_at;
 198
 199                 for (m->m_pkthdr.len = 0, m1 = m; m1; m1 = m1->m_next)
 200                         m->m_pkthdr.len += m1->m_len;
 201                 m->m_pkthdr.rcvif = 0;
 202
 203                 /* *** Note: AT is sending out mbufs of type MSG_DATA,
 204                    not MT_DATA.  *** */
 205 #ifdef APPLETALK_DEBUG
 206                 if (m->m_next &&
 207                     !((m->m_next)->m_flags & M_EXT))
 208                         kprintf("po: mlen= %d, m2len= %d\n", m->m_len,
 209                                 (m->m_next)->m_len);
 210 #endif
 211                 dlil_output(patp->at_dl_tag, m, NULL, &dst, 0);
 212
 213                 pktsOut++;
 214         }
 215
 216         return 0;
 217 } /* pat_output */
 218
 219 void atalkintr()
 220 {
 221         struct mbuf *m, *m1, *mlist = NULL;
 222         struct ifnet *ifp;
 223         int s;
 224         llc_header_t *llc_header;
 225         at_ifaddr_t *ifID;
 226         char src[6];
 227         enet_header_t *enet_header;
 228
 229 next:
 230         s = splimp();
 231         IF_DEQUEUE(&atalkintrq, m);
 232         splx(s);
 233
 234         if (m == 0)
 235                 return;
 236
 237         for ( ; m ; m = mlist) {
 238           mlist = m->m_nextpkt;
 239 #ifdef APPLETALK_DEBUG
 240           /* packet chains are not yet in use on input */
 241           if (mlist) kprintf("atalkintr: packet chain\n");
 242 #endif
 243           m->m_nextpkt = 0;
 244
 245           if (!appletalk_inited) {
 246                 m_freem(m);
 247                 continue;
 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                 continue;
 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                 continue; /* 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                 continue;
 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                 bcopy((char *)enet_header->src, src, sizeof(src));
 286
 287 #ifdef COMMENT  /* In order to receive packets from the Blue Box, we cannot
 288                    reject packets whose source address matches our local address.
 289                 */
 290                 if ((enet_header->dst[0] & 1) &&
 291                     (bcmp(src, ifID->xaddr, sizeof(src)) == 0)) {
 292                   /* Packet rejected: think it's a local mcast. */
 293                   m_freem(m);
 294                   continue; /* was EAFNOSUPPORT */
 295                 }
 296 #endif /* COMMENT */
 297
 298                 llc_header = (llc_header_t *)(enet_header+1);
 299
 300                 /* advance the mbuf pointers past the ethernet header */
 301                 m->m_data += ENET_LLC_SIZE;
 302                 m->m_len -= ENET_LLC_SIZE;
 303
 304                 pktsIn++;
 305
 306                 if (LLC_PROTO_EQUAL(llc_header->protocol,snap_proto_aarp)) {
 307                         (void)aarp_rcv_pkt(mtod(m, aarp_pkt_t *), ifID);
 308                         m_freem(m);
 309                 }
 310                 else if (LLC_PROTO_EQUAL(llc_header->protocol, snap_proto_ddp)) {
 311                         /* if we're a router take all pkts */
 312                         if (!ROUTING_MODE) {
 313                           if (aarp_chk_addr(mtod(m, at_ddp_t  *), ifID)
 314                               == AARP_ERR_NOT_OURS) {
 315 #ifdef APPLETALK_DEBUG
 316                             kprintf("pat_input: Packet Rejected: not for us? dest=%x.%x.%x.%x.%x.%x LLC_PROTO= %02x%02x\n",
 317                                     enet_header->dst[0], enet_header->dst[1],
 318                                     enet_header->dst[2], enet_header->dst[3],
 319                                     enet_header->dst[4], enet_header->dst[5],
 320                                     llc_header->protocol[3],
 321                                     llc_header->protocol[4]);
 322 #endif
 323                             m_freem(m);
 324                             continue; /* was EAFNOSUPPORT */
 325                           }
 326                         }
 327                         MCHTYPE(m, MSG_DATA); /* set the mbuf type */
 328
 329                         ifID->stats.rcv_packets++;
 330                         for (m1 = m; m1; m1 = m1->m_next)
 331                                 ifID->stats.rcv_bytes += m1->m_len;
 332
 333                         if (!MULTIPORT_MODE)
 334                                 ddp_glean(m, ifID, src);
 335
 336                         ddp_input(m, ifID);
 337                 } else {
 338 #ifdef APPLETALK_DEBUG
 339                         kprintf("pat_input: Packet Rejected: wrong LLC_PROTO = %02x%02x\n",
 340                                 llc_header->protocol[3],
 341                                 llc_header->protocol[4]);
 342 #endif
 343                         m_freem(m);
 344                 }
 345               }
 346         }
 347         goto next;
 348 } /* atalkintr */