bsd/netat/aurp_tx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  *      Copyright (c) 1996 Apple Computer, Inc.
  24  *
  25  *              Created April 8, 1996 by Tuyen Nguyen
  26  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  27  *
  28  *      File: tx.c
  29  */
  30 #include <sys/errno.h>
  31 #include <sys/types.h>
  32 #include <sys/param.h>
  33 #include <machine/spl.h>
  34 #include <sys/systm.h>
  35 #include <sys/kernel.h>
  36 #include <sys/proc.h>
  37 #include <sys/filedesc.h>
  38 #include <sys/fcntl.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/socket.h>
  41 #include <sys/socketvar.h>
  42 #include <net/if.h>
  43
  44 #include <netat/sysglue.h>
  45 #include <netat/appletalk.h>
  46 #include <netat/at_var.h>
  47 #include <netat/routing_tables.h>
  48 #include <netat/at_pcb.h>
  49 #include <netat/aurp.h>
  50 #include <netat/debug.h>
  51
  52 /*
  53  * Any AURP protocol or appletalk data (ddp) packets flowing through
  54  *  are inserted into the kernel aurpd process's (atalk) input queue.
  55  * Assume here that we deal with single packets, i.e., someone earlier
  56  *  in the food chain has broken up packet chains.
  57  */
  58 void AURPsend(mdata, type, node)
  59         gbuf_t *mdata;
  60         int type, node;
  61 {
  62         struct aurp_domain *domain;
  63         gbuf_t *m;
  64         int msize = AT_WR_OFFSET+32+IP_DOMAINSIZE;
  65
  66         /* Add the domain header */
  67         if ((m = gbuf_alloc(msize, PRI_MED)) == 0) {
  68                 gbuf_freem(mdata);
  69                 dPrintf(D_M_AURP, D_L_WARNING, ("AURPsend: gbuf_alloc failed\n"));
  70                 return;
  71         }
  72         gbuf_wset(m,msize);
  73         gbuf_rinc(m,AT_WR_OFFSET+32);
  74         gbuf_cont(m) = mdata;
  75         domain = (struct aurp_domain *)gbuf_rptr(m);
  76         domain->dst_length = IP_LENGTH;
  77         domain->dst_authority = IP_AUTHORITY;
  78         domain->dst_distinguisher = IP_DISTINGUISHER;
  79         domain->src_length = IP_LENGTH;
  80         domain->src_authority = IP_AUTHORITY;
  81         domain->src_distinguisher = IP_DISTINGUISHER;
  82         domain->src_address = aurp_global.src_addr;
  83         domain->version = AUD_Version;
  84         domain->reserved = 0;
  85         domain->type = type;
  86         domain->dst_address = aurp_global.dst_addr[node];
  87         atalk_to_ip(m);
  88 }
  89
  90 /*
  91  * Called from within ddp (via ddp_AURPsendx) to handle data (DDP) packets
  92  *  sent from the AppleTalk stack, routing updates, and routing info
  93  *  initialization.
  94  */
  95 void AURPcmdx(code, mdata, param)
  96         int code;
  97         gbuf_t *mdata;
  98         int param;
  99 {
 100         unsigned char node;
 101         gbuf_t *mdata_next;
 102
 103         if (mdata == 0)
 104                 return;
 105         if (aurp_gref == 0) {
 106                 if (code != AURPCODE_DEBUGINFO)
 107                         AURPfreemsg(mdata);
 108                 return;
 109         }
 110
 111         switch (code) {
 112         case AURPCODE_DATAPKT: /* data packet */
 113                 node = (unsigned char)param;
 114                 if (gbuf_next(mdata)) {
 115                         mdata_next = gbuf_next(mdata);
 116                         gbuf_next(mdata) = 0;
 117                         AURPsend(mdata, AUD_Atalk, node);
 118                         do {
 119                                 mdata = mdata_next;
 120                                 mdata_next = gbuf_next(mdata);
 121                                 gbuf_next(mdata) = 0;
 122                                 /* Indicate non-AURP packet, node id of peer */
 123                                 AURPsend(mdata, AUD_Atalk, node);
 124                         } while (mdata_next);
 125                 } else
 126                         AURPsend(mdata, AUD_Atalk, node);
 127                 break;
 128
 129         case AURPCODE_RTUPDATE:
 130                 AURPrtupdate((RT_entry *)mdata, param);
 131                 break;
 132
 133         case AURPCODE_DEBUGINFO: /* debug info */
 134                 dbgBits = *(dbgBits_t *)mdata;
 135                 net_port = param;
 136                 break;
 137
 138         default:
 139                 dPrintf(D_M_AURP, D_L_ERROR, ("AURPcmdx: bad code, %d\n", code));
 140         }
 141 }