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