bsd/netat/aurp_tx.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 (c) 1996 Apple Computer, Inc.
  30  *
  31  *              Created April 8, 1996 by Tuyen Nguyen
  32  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  33  *
  34  *      File: tx.c
  35  */
  36
  37 #ifdef AURP_SUPPORT
  38
  39 #include <sys/errno.h>
  40 #include <sys/types.h>
  41 #include <sys/param.h>
  42 #include <machine/spl.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/proc.h>
  46 #include <sys/filedesc.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/socket.h>
  50 #include <sys/socketvar.h>
  51 #include <net/if.h>
  52
  53 #include <netat/sysglue.h>
  54 #include <netat/appletalk.h>
  55 #include <netat/at_pcb.h>
  56 #include <netat/at_var.h>
  57 #include <netat/routing_tables.h>
  58 #include <netat/aurp.h>
  59 #include <netat/debug.h>
  60
  61 /*
  62  * Any AURP protocol or appletalk data (ddp) packets flowing through
  63  *  are inserted into the kernel aurpd process's (atalk) input queue.
  64  * Assume here that we deal with single packets, i.e., someone earlier
  65  *  in the food chain has broken up packet chains.
  66  */
  67 void AURPsend(mdata, type, node)
  68         gbuf_t *mdata;
  69         int type, node;
  70 {
  71         struct aurp_domain *domain;
  72         gbuf_t *m;
  73         int msize = AT_WR_OFFSET+32+IP_DOMAINSIZE;
  74
  75         /* Add the domain header */
  76         if ((m = gbuf_alloc(msize, PRI_MED)) == 0) {
  77                 gbuf_freem(mdata);
  78                 dPrintf(D_M_AURP, D_L_WARNING, ("AURPsend: gbuf_alloc failed\n"));
  79                 return;
  80         }
  81         gbuf_wset(m,msize);
  82         gbuf_rinc(m,AT_WR_OFFSET+32);
  83         gbuf_cont(m) = mdata;
  84         domain = (struct aurp_domain *)gbuf_rptr(m);
  85         domain->dst_length = IP_LENGTH;
  86         domain->dst_authority = IP_AUTHORITY;
  87         domain->dst_distinguisher = IP_DISTINGUISHER;
  88         domain->src_length = IP_LENGTH;
  89         domain->src_authority = IP_AUTHORITY;
  90         domain->src_distinguisher = IP_DISTINGUISHER;
  91         domain->src_address = aurp_global.src_addr;
  92         domain->version = AUD_Version;
  93         domain->reserved = 0;
  94         domain->type = type;
  95         domain->dst_address = aurp_global.dst_addr[node];
  96         atalk_to_ip(m);
  97 }
  98
  99 /*
 100  * Called from within ddp (via ddp_AURPsendx) to handle data (DDP) packets
 101  *  sent from the AppleTalk stack, routing updates, and routing info
 102  *  initialization.
 103  */
 104 void AURPcmdx(code, mdata, param)
 105         int code;
 106         gbuf_t *mdata;
 107         int param;
 108 {
 109         unsigned char node;
 110         gbuf_t *mdata_next;
 111
 112         if (mdata == 0)
 113                 return;
 114         if (aurp_gref == 0) {
 115                 if (code != AURPCODE_DEBUGINFO)
 116                         AURPfreemsg(mdata);
 117                 return;
 118         }
 119
 120         switch (code) {
 121         case AURPCODE_DATAPKT: /* data packet */
 122                 node = (unsigned char)param;
 123                 if (gbuf_next(mdata)) {
 124                         mdata_next = gbuf_next(mdata);
 125                         gbuf_next(mdata) = 0;
 126                         AURPsend(mdata, AUD_Atalk, node);
 127                         do {
 128                                 mdata = mdata_next;
 129                                 mdata_next = gbuf_next(mdata);
 130                                 gbuf_next(mdata) = 0;
 131                                 /* Indicate non-AURP packet, node id of peer */
 132                                 AURPsend(mdata, AUD_Atalk, node);
 133                         } while (mdata_next);
 134                 } else
 135                         AURPsend(mdata, AUD_Atalk, node);
 136                 break;
 137
 138         case AURPCODE_RTUPDATE:
 139                 AURPrtupdate((RT_entry *)mdata, param);
 140                 break;
 141
 142         case AURPCODE_DEBUGINFO: /* debug info */
 143                 dbgBits = *(dbgBits_t *)mdata;
 144                 net_port = param;
 145                 break;
 146
 147         default:
 148                 dPrintf(D_M_AURP, D_L_ERROR, ("AURPcmdx: bad code, %d\n", code));
 149         }
 150 }
 151
 152 #endif  /* AURP_SUPPORT */