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