bsd/netat/aurp_tx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  *      Copyright (c) 1996 Apple Computer, Inc.
  27  *
  28  *              Created April 8, 1996 by Tuyen Nguyen
  29  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  30  *
  31  *      File: tx.c
  32  */
  33 #include <sys/errno.h>
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <machine/spl.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/proc.h>
  40 #include <sys/filedesc.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <net/if.h>
  46
  47 #include <netat/sysglue.h>
  48 #include <netat/appletalk.h>
  49 #include <netat/at_var.h>
  50 #include <netat/routing_tables.h>
  51 #include <netat/at_pcb.h>
  52 #include <netat/aurp.h>
  53 #include <netat/debug.h>
  54
  55 /*
  56  * Any AURP protocol or appletalk data (ddp) packets flowing through
  57  *  are inserted into the kernel aurpd process's (atalk) input queue.
  58  * Assume here that we deal with single packets, i.e., someone earlier
  59  *  in the food chain has broken up packet chains.
  60  */
  61 void AURPsend(mdata, type, node)
  62         gbuf_t *mdata;
  63         int type, node;
  64 {
  65         struct aurp_domain *domain;
  66         gbuf_t *m;
  67         int msize = AT_WR_OFFSET+32+IP_DOMAINSIZE;
  68
  69         /* Add the domain header */
  70         if ((m = gbuf_alloc(msize, PRI_MED)) == 0) {
  71                 gbuf_freem(mdata);
  72                 dPrintf(D_M_AURP, D_L_WARNING, ("AURPsend: gbuf_alloc failed\n"));
  73                 return;
  74         }
  75         gbuf_wset(m,msize);
  76         gbuf_rinc(m,AT_WR_OFFSET+32);
  77         gbuf_cont(m) = mdata;
  78         domain = (struct aurp_domain *)gbuf_rptr(m);
  79         domain->dst_length = IP_LENGTH;
  80         domain->dst_authority = IP_AUTHORITY;
  81         domain->dst_distinguisher = IP_DISTINGUISHER;
  82         domain->src_length = IP_LENGTH;
  83         domain->src_authority = IP_AUTHORITY;
  84         domain->src_distinguisher = IP_DISTINGUISHER;
  85         domain->src_address = aurp_global.src_addr;
  86         domain->version = AUD_Version;
  87         domain->reserved = 0;
  88         domain->type = type;
  89         domain->dst_address = aurp_global.dst_addr[node];
  90         atalk_to_ip(m);
  91 }
  92
  93 /*
  94  * Called from within ddp (via ddp_AURPsendx) to handle data (DDP) packets
  95  *  sent from the AppleTalk stack, routing updates, and routing info
  96  *  initialization.
  97  */
  98 void AURPcmdx(code, mdata, param)
  99         int code;
 100         gbuf_t *mdata;
 101         int param;
 102 {
 103         unsigned char node;
 104         gbuf_t *mdata_next;
 105
 106         if (mdata == 0)
 107                 return;
 108         if (aurp_gref == 0) {
 109                 if (code != AURPCODE_DEBUGINFO)
 110                         AURPfreemsg(mdata);
 111                 return;
 112         }
 113
 114         switch (code) {
 115         case AURPCODE_DATAPKT: /* data packet */
 116                 node = (unsigned char)param;
 117                 if (gbuf_next(mdata)) {
 118                         mdata_next = gbuf_next(mdata);
 119                         gbuf_next(mdata) = 0;
 120                         AURPsend(mdata, AUD_Atalk, node);
 121                         do {
 122                                 mdata = mdata_next;
 123                                 mdata_next = gbuf_next(mdata);
 124                                 gbuf_next(mdata) = 0;
 125                                 /* Indicate non-AURP packet, node id of peer */
 126                                 AURPsend(mdata, AUD_Atalk, node);
 127                         } while (mdata_next);
 128                 } else
 129                         AURPsend(mdata, AUD_Atalk, node);
 130                 break;
 131
 132         case AURPCODE_RTUPDATE:
 133                 AURPrtupdate((RT_entry *)mdata, param);
 134                 break;
 135
 136         case AURPCODE_DEBUGINFO: /* debug info */
 137                 dbgBits = *(dbgBits_t *)mdata;
 138                 net_port = param;
 139                 break;
 140
 141         default:
 142                 dPrintf(D_M_AURP, D_L_ERROR, ("AURPcmdx: bad code, %d\n", code));
 143         }
 144 }