bsd/netat/aurp_tx.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  *      Copyright (c) 1996 Apple Computer, Inc.
  32  *
  33  *              Created April 8, 1996 by Tuyen Nguyen
  34  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  35  *
  36  *      File: tx.c
  37  */
  38 #include <sys/errno.h>
  39 #include <sys/types.h>
  40 #include <sys/param.h>
  41 #include <machine/spl.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/proc.h>
  45 #include <sys/filedesc.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/mbuf.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <net/if.h>
  51
  52 #include <netat/sysglue.h>
  53 #include <netat/appletalk.h>
  54 #include <netat/at_var.h>
  55 #include <netat/routing_tables.h>
  56 #include <netat/at_pcb.h>
  57 #include <netat/aurp.h>
  58 #include <netat/debug.h>
  59
  60 /*
  61  * Any AURP protocol or appletalk data (ddp) packets flowing through
  62  *  are inserted into the kernel aurpd process's (atalk) input queue.
  63  * Assume here that we deal with single packets, i.e., someone earlier
  64  *  in the food chain has broken up packet chains.
  65  */
  66 void AURPsend(mdata, type, node)
  67         gbuf_t *mdata;
  68         int type, node;
  69 {
  70         struct aurp_domain *domain;
  71         gbuf_t *m;
  72         int msize = AT_WR_OFFSET+32+IP_DOMAINSIZE;
  73
  74         /* Add the domain header */
  75         if ((m = gbuf_alloc(msize, PRI_MED)) == 0) {
  76                 gbuf_freem(mdata);
  77                 dPrintf(D_M_AURP, D_L_WARNING, ("AURPsend: gbuf_alloc failed\n"));
  78                 return;
  79         }
  80         gbuf_wset(m,msize);
  81         gbuf_rinc(m,AT_WR_OFFSET+32);
  82         gbuf_cont(m) = mdata;
  83         domain = (struct aurp_domain *)gbuf_rptr(m);
  84         domain->dst_length = IP_LENGTH;
  85         domain->dst_authority = IP_AUTHORITY;
  86         domain->dst_distinguisher = IP_DISTINGUISHER;
  87         domain->src_length = IP_LENGTH;
  88         domain->src_authority = IP_AUTHORITY;
  89         domain->src_distinguisher = IP_DISTINGUISHER;
  90         domain->src_address = aurp_global.src_addr;
  91         domain->version = AUD_Version;
  92         domain->reserved = 0;
  93         domain->type = type;
  94         domain->dst_address = aurp_global.dst_addr[node];
  95         atalk_to_ip(m);
  96 }
  97
  98 /*
  99  * Called from within ddp (via ddp_AURPsendx) to handle data (DDP) packets
 100  *  sent from the AppleTalk stack, routing updates, and routing info
 101  *  initialization.
 102  */
 103 void AURPcmdx(code, mdata, param)
 104         int code;
 105         gbuf_t *mdata;
 106         int param;
 107 {
 108         unsigned char node;
 109         gbuf_t *mdata_next;
 110
 111         if (mdata == 0)
 112                 return;
 113         if (aurp_gref == 0) {
 114                 if (code != AURPCODE_DEBUGINFO)
 115                         AURPfreemsg(mdata);
 116                 return;
 117         }
 118
 119         switch (code) {
 120         case AURPCODE_DATAPKT: /* data packet */
 121                 node = (unsigned char)param;
 122                 if (gbuf_next(mdata)) {
 123                         mdata_next = gbuf_next(mdata);
 124                         gbuf_next(mdata) = 0;
 125                         AURPsend(mdata, AUD_Atalk, node);
 126                         do {
 127                                 mdata = mdata_next;
 128                                 mdata_next = gbuf_next(mdata);
 129                                 gbuf_next(mdata) = 0;
 130                                 /* Indicate non-AURP packet, node id of peer */
 131                                 AURPsend(mdata, AUD_Atalk, node);
 132                         } while (mdata_next);
 133                 } else
 134                         AURPsend(mdata, AUD_Atalk, node);
 135                 break;
 136
 137         case AURPCODE_RTUPDATE:
 138                 AURPrtupdate((RT_entry *)mdata, param);
 139                 break;
 140
 141         case AURPCODE_DEBUGINFO: /* debug info */
 142                 dbgBits = *(dbgBits_t *)mdata;
 143                 net_port = param;
 144                 break;
 145
 146         default:
 147                 dPrintf(D_M_AURP, D_L_ERROR, ("AURPcmdx: bad code, %d\n", code));
 148         }
 149 }