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
  86
  87 void atalk_load()
  88 {
  89         extern lck_mtx_t *domain_proto_mtx;
  90
  91
  92         atp_init();
  93         atp_link();
  94         adspInited = 0;
  95
  96 /*      adsp_init();
  97                 for 2225395
  98                 this happens in adsp_open and is undone on ADSP_UNLINK
  99 */
 100         lck_mtx_unlock(domain_proto_mtx);
 101         proto_register_input(PF_APPLETALK, at_input_packet, NULL);
 102         lck_mtx_lock(domain_proto_mtx);
 103 } /* atalk_load */
 104
 105 /* Undo everything atalk_load() did. */
 106 void atalk_unload()  /* not currently used */
 107 {
 108         extern gbuf_t *scb_resource_m;
 109         extern gbuf_t *atp_resource_m;
 110
 111         atp_unlink();
 112
 113 #ifdef NOT_YET
 114         if (scb_resource_m) {
 115                 gbuf_freem(scb_resource_m);
 116                 scb_resource_m = 0;
 117                 scb_free_list = 0;
 118         }
 119         /* allocated in atp_trans_alloc() */
 120         if (atp_resource_m) {
 121                 gbuf_freem(atp_resource_m);
 122                 atp_resource_m = 0;
 123                 atp_trans_free_list = 0;
 124         }
 125 #endif
 126
 127         appletalk_inited = 0;
 128 } /* atalk_unload */
 129
 130 void appletalk_hack_start()
 131 {
 132         if (!appletalk_inited) {
 133                 atalk_load();
 134                 atalkintrq.ifq_maxlen = IFQ_MAXLEN;
 135                 appletalk_inited = 1;
 136         }
 137 } /* appletalk_hack_start */
 138
 139 int pat_output(patp, mlist, dst_addr, type)
 140         at_ifaddr_t *patp;
 141         struct mbuf *mlist;                     /* packet chain */
 142         unsigned char *dst_addr;        /* for atalk addr - net # must be in network byte order */
 143         int     type;
 144 {
 145         struct mbuf *m, *m1;
 146         llc_header_t *llc_header;
 147         struct sockaddr dst;
 148
 149         if (! patp->aa_ifp) {
 150                 for (m = mlist; m; m = mlist) {
 151                         mlist = m->m_nextpkt;
 152                         m->m_nextpkt = 0;
 153                         m_freem(m);
 154                 }
 155                 return ENOTREADY;
 156         }
 157
 158         /* this is for ether_output */
 159         dst.sa_family = AF_APPLETALK;
 160         dst.sa_len = 2 + sizeof(struct etalk_addr);
 161         bcopy (dst_addr, &dst.sa_data[0], sizeof(struct etalk_addr));
 162
 163         /* packet chains are used on output and can be tested using aufs */
 164         for (m = mlist; m; m = mlist) {
 165                 mlist = m->m_nextpkt;
 166                 m->m_nextpkt = 0;
 167
 168                 M_PREPEND(m, sizeof(llc_header_t), M_DONTWAIT);
 169                 if (m == 0) {
 170                         continue;
 171                 }
 172
 173                 llc_header = mtod(m, llc_header_t *);
 174                 *llc_header =
 175                   (type == AARP_AT_TYPE) ? snap_hdr_aarp : snap_hdr_at;
 176
 177                 for (m->m_pkthdr.len = 0, m1 = m; m1; m1 = m1->m_next)
 178                         m->m_pkthdr.len += m1->m_len;
 179                 m->m_pkthdr.rcvif = 0;
 180
 181                 /* *** Note: AT is sending out mbufs of type MSG_DATA,
 182                    not MT_DATA.  *** */
 183 #ifdef APPLETALK_DEBUG
 184                 if (m->m_next &&
 185                     !((m->m_next)->m_flags & M_EXT))
 186                         kprintf("po: mlen= %d, m2len= %d\n", m->m_len,
 187                                 (m->m_next)->m_len);
 188 #endif
 189                 atalk_unlock();
 190                 dlil_output(patp->aa_ifp, PF_APPLETALK, m, NULL, &dst, 0);
 191                 atalk_lock();
 192
 193                 pktsOut++;
 194         }
 195
 196         return 0;
 197 } /* pat_output */
 198
 199 static void
 200 at_input_packet(
 201         __unused protocol_family_t      protocol,
 202         mbuf_t                                          m)
 203 {
 204         struct mbuf *m1;
 205         struct ifnet *ifp;
 206         llc_header_t *llc_header;
 207         at_ifaddr_t *ifID;
 208         char src[6];
 209         enet_header_t *enet_header;
 210
 211         if (!appletalk_inited) {
 212                 m_freem(m);
 213                 return;
 214         }
 215
 216         if ((m->m_flags & M_PKTHDR) == 0) {
 217 #ifdef APPLETALK_DEBUG
 218                 kprintf("atalkintr: no HDR on packet received");
 219 #endif
 220                 m_freem(m);
 221                 return;
 222         }
 223
 224           /* make sure the interface this packet was received on is configured
 225              for AppleTalk */
 226           ifp = m->m_pkthdr.rcvif;
 227           TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
 228                 if (ifID->aa_ifp && (ifID->aa_ifp == ifp))
 229                         break;
 230           }
 231           /* if we didn't find a matching interface */
 232           if (!ifID) {
 233                 m_freem(m);
 234                 return; /* was EAFNOSUPPORT */
 235           }
 236
 237           /* make sure the entire packet header is in the current mbuf */
 238           if (m->m_len < ENET_LLC_SIZE &&
 239               (m = m_pullup(m, ENET_LLC_SIZE)) == 0) {
 240 #ifdef APPLETALK_DEBUG
 241                 kprintf("atalkintr: packet too small\n");
 242 #endif
 243                 m_freem(m);
 244                 return;
 245           }
 246           enet_header = mtod(m, enet_header_t *);
 247
 248           /* Ignore multicast packets from local station */
 249           /* *** Note: code for IFTYPE_TOKENTALK may be needed here. *** */
 250           if (ifID->aa_ifp->if_type == IFT_ETHER ||
 251                 ifID->aa_ifp->if_type == IFT_L2VLAN ||
 252                 ifID->aa_ifp->if_type == IFT_IEEE8023ADLAG) {
 253                 bcopy((char *)enet_header->src, src, sizeof(src));
 254
 255 #ifdef COMMENT  /* In order to receive packets from the Blue Box, we cannot
 256                    reject packets whose source address matches our local address.
 257                 */
 258                 if ((enet_header->dst[0] & 1) &&
 259                     (bcmp(src, ifID->xaddr, sizeof(src)) == 0)) {
 260                   /* Packet rejected: think it's a local mcast. */
 261                   m_freem(m);
 262                   return; /* was EAFNOSUPPORT */
 263                 }
 264 #endif /* COMMENT */
 265
 266                 llc_header = (llc_header_t *)(enet_header+1);
 267
 268                 /* advance the mbuf pointers past the ethernet header */
 269                 m->m_data += ENET_LLC_SIZE;
 270                 m->m_len -= ENET_LLC_SIZE;
 271
 272                 pktsIn++;
 273
 274                 if (LLC_PROTO_EQUAL(llc_header->protocol,snap_proto_aarp)) {
 275                         (void)aarp_rcv_pkt(mtod(m, aarp_pkt_t *), ifID);
 276                         m_freem(m);
 277                 }
 278                 else if (LLC_PROTO_EQUAL(llc_header->protocol, snap_proto_ddp)) {
 279                         /* if we're a router take all pkts */
 280                         if (!ROUTING_MODE) {
 281                           if (aarp_chk_addr(mtod(m, at_ddp_t  *), ifID)
 282                               == AARP_ERR_NOT_OURS) {
 283 #ifdef APPLETALK_DEBUG
 284                             kprintf("pat_input: Packet Rejected: not for us? dest=%x.%x.%x.%x.%x.%x LLC_PROTO= %02x%02x\n",
 285                                     enet_header->dst[0], enet_header->dst[1],
 286                                     enet_header->dst[2], enet_header->dst[3],
 287                                     enet_header->dst[4], enet_header->dst[5],
 288                                     llc_header->protocol[3],
 289                                     llc_header->protocol[4]);
 290 #endif
 291                             m_freem(m);
 292                             return; /* was EAFNOSUPPORT */
 293                           }
 294                         }
 295                         MCHTYPE(m, MSG_DATA); /* set the mbuf type */
 296
 297                         ifID->stats.rcv_packets++;
 298                         for (m1 = m; m1; m1 = m1->m_next)
 299                                 ifID->stats.rcv_bytes += m1->m_len;
 300
 301                         if (!MULTIPORT_MODE)
 302                                 ddp_glean(m, ifID, src);
 303
 304                         ddp_input(m, ifID);
 305                 } else {
 306 #ifdef APPLETALK_DEBUG
 307                         kprintf("pat_input: Packet Rejected: wrong LLC_PROTO = %02x%02x\n",
 308                                 llc_header->protocol[3],
 309                                 llc_header->protocol[4]);
 310 #endif
 311                         m_freem(m);
 312                 }
 313         }
 314 }