bsd/netat/aurp_tx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  *      Copyright (c) 1996 Apple Computer, Inc.
  25  *
  26  *              Created April 8, 1996 by Tuyen Nguyen
  27  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  28  *
  29  *      File: tx.c
  30  */
  31 #include <sys/errno.h>
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <machine/spl.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/filedesc.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/socket.h>
  42 #include <sys/socketvar.h>
  43 #include <net/if.h>
  44
  45 #include <netat/sysglue.h>
  46 #include <netat/appletalk.h>
  47 #include <netat/at_var.h>
  48 #include <netat/routing_tables.h>
  49 #include <netat/at_pcb.h>
  50 #include <netat/aurp.h>
  51 #include <netat/debug.h>
  52
  53 /*
  54  * Any AURP protocol or appletalk data (ddp) packets flowing through
  55  *  are inserted into the kernel aurpd process's (atalk) input queue.
  56  * Assume here that we deal with single packets, i.e., someone earlier
  57  *  in the food chain has broken up packet chains.
  58  */
  59 void AURPsend(mdata, type, node)
  60         gbuf_t *mdata;
  61         int type, node;
  62 {
  63         struct aurp_domain *domain;
  64         gbuf_t *m;
  65         int msize = AT_WR_OFFSET+32+IP_DOMAINSIZE;
  66
  67         /* Add the domain header */
  68         if ((m = gbuf_alloc(msize, PRI_MED)) == 0) {
  69                 gbuf_freem(mdata);
  70                 dPrintf(D_M_AURP, D_L_WARNING, ("AURPsend: gbuf_alloc failed\n"));
  71                 return;
  72         }
  73         gbuf_wset(m,msize);
  74         gbuf_rinc(m,AT_WR_OFFSET+32);
  75         gbuf_cont(m) = mdata;
  76         domain = (struct aurp_domain *)gbuf_rptr(m);
  77         domain->dst_length = IP_LENGTH;
  78         domain->dst_authority = IP_AUTHORITY;
  79         domain->dst_distinguisher = IP_DISTINGUISHER;
  80         domain->src_length = IP_LENGTH;
  81         domain->src_authority = IP_AUTHORITY;
  82         domain->src_distinguisher = IP_DISTINGUISHER;
  83         domain->src_address = aurp_global.src_addr;
  84         domain->version = AUD_Version;
  85         domain->reserved = 0;
  86         domain->type = type;
  87         domain->dst_address = aurp_global.dst_addr[node];
  88         atalk_to_ip(m);
  89 }
  90
  91 /*
  92  * Called from within ddp (via ddp_AURPsendx) to handle data (DDP) packets
  93  *  sent from the AppleTalk stack, routing updates, and routing info
  94  *  initialization.
  95  */
  96 void AURPcmdx(code, mdata, param)
  97         int code;
  98         gbuf_t *mdata;
  99         int param;
 100 {
 101         unsigned char node;
 102         gbuf_t *mdata_next;
 103
 104         if (mdata == 0)
 105                 return;
 106         if (aurp_gref == 0) {
 107                 if (code != AURPCODE_DEBUGINFO)
 108                         AURPfreemsg(mdata);
 109                 return;
 110         }
 111
 112         switch (code) {
 113         case AURPCODE_DATAPKT: /* data packet */
 114                 node = (unsigned char)param;
 115                 if (gbuf_next(mdata)) {
 116                         mdata_next = gbuf_next(mdata);
 117                         gbuf_next(mdata) = 0;
 118                         AURPsend(mdata, AUD_Atalk, node);
 119                         do {
 120                                 mdata = mdata_next;
 121                                 mdata_next = gbuf_next(mdata);
 122                                 gbuf_next(mdata) = 0;
 123                                 /* Indicate non-AURP packet, node id of peer */
 124                                 AURPsend(mdata, AUD_Atalk, node);
 125                         } while (mdata_next);
 126                 } else
 127                         AURPsend(mdata, AUD_Atalk, node);
 128                 break;
 129
 130         case AURPCODE_RTUPDATE:
 131                 AURPrtupdate((RT_entry *)mdata, param);
 132                 break;
 133
 134         case AURPCODE_DEBUGINFO: /* debug info */
 135                 dbgBits = *(dbgBits_t *)mdata;
 136                 net_port = param;
 137                 break;
 138
 139         default:
 140                 dPrintf(D_M_AURP, D_L_ERROR, ("AURPcmdx: bad code, %d\n", code));
 141         }
 142 }