bsd/netat/ddp_proto.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  *      Copyright (c) 1988, 1989, 1997, 1998 Apple Computer, Inc.
  27  *
  28  *   Modified for MP, 1996 by Tuyen Nguyen
  29  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  30  */
  31
  32 /* ddp_proto.c: 2.0, 1.23; 10/18/93; Apple Computer, Inc. */
  33
  34 #include <sys/errno.h>
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <machine/spl.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/proc.h>
  41 #include <sys/filedesc.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/malloc.h>
  46 #include <sys/socket.h>
  47 #include <sys/socketvar.h>
  48 #include <sys/buf.h>
  49
  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/ddp.h>
  56 #include <netat/zip.h>
  57 #include <netat/at_pcb.h>
  58
  59 extern at_ifaddr_t *ifID_home;
  60
  61 void ddp_putmsg(gref, mp)
  62         gref_t *gref;
  63         gbuf_t *mp;
  64 {
  65         u_char socket;
  66         register ioc_t  *iocbp;
  67         register int    error;
  68         at_ddp_t *ddp;
  69
  70         switch(gbuf_type(mp)) {
  71         case MSG_DATA :
  72                 /* If this message is going out on a socket that's not bound,
  73                  * nail it.
  74                  */
  75                 ddp = (at_ddp_t *)gbuf_rptr(mp);
  76                 if ((ddp->type == DDP_ATP) || (ddp->type == DDP_ADSP)) {
  77                         if ((gref == 0) || (gref->lport == 0)) {
  78                                 int src_addr_included =
  79                                   ((ddp->type==DDP_ATP) && ddp->src_node)? 1 : 0;
  80                                 (void)ddp_output(&mp, ddp->src_socket,
  81                                                  src_addr_included);
  82                                 return;
  83                         }
  84                 }
  85
  86                 if (gref && (gref->lport == 0)) {
  87                         gbuf_freel(mp);
  88                         atalk_notify(gref, ENOTCONN);
  89                         return;
  90                 }
  91                 if ((error = ddp_output(&mp, gref->lport, 0)) != 0) {
  92                         if (gref)
  93                                 atalk_notify(gref, error);
  94                 }
  95                 return;
  96
  97         case MSG_IOCTL :
  98                 iocbp = (ioc_t *)gbuf_rptr(mp);
  99                 if (DDP_IOC_MYIOCTL(iocbp->ioc_cmd)) {
 100                         switch(iocbp->ioc_cmd) {
 101                         case DDP_IOC_GET_CFG :
 102                           /* Note that DDP_IOC_GET_CFG / AppleTalk ddp_config()
 103                              fills in the net and node of the ddp_addr_t param
 104                              with the net and node of the default interface,
 105                              not the net and node that has been bound, as
 106                              getsockname() and sockopt DDP_GETSOCKNAME do.
 107                           */
 108 #ifdef APPLETALK_DEBUG
 109                                 kprintf("ddp_putmsg: DDP_IOC_GET_CFG\n");
 110 #endif
 111                                 if (gbuf_cont(mp))
 112                                         gbuf_freem(gbuf_cont(mp));
 113                                 if ((gbuf_cont(mp) =
 114                                      gbuf_alloc(sizeof(ddp_addr_t),
 115                                                 PRI_MED)) == NULL) {
 116                                         ioc_ack(ENOBUFS, mp, gref);
 117                                         break;
 118                                 }
 119                                 {
 120                                 /* *** was ddp_get_cfg() *** */
 121                                   ddp_addr_t *cfgp =
 122                                     (ddp_addr_t *)gbuf_rptr(gbuf_cont(mp));
 123                                   cfgp->inet.net = ifID_home->ifThisNode.s_net;
 124                                   cfgp->inet.node = ifID_home->ifThisNode.s_node;
 125 #ifdef NOT_YET
 126                                   cfgp->inet.net = gref->laddr.s_net;
 127                                   cfgp->inet.node = gref->laddr.s_node;
 128 #endif
 129                                   cfgp->inet.socket = gref->lport;
 130                                   cfgp->ddptype = gref->ddptype;
 131                                 }
 132                                 gbuf_wset(gbuf_cont(mp), sizeof(ddp_addr_t));
 133                                 iocbp->ioc_count = sizeof(ddp_addr_t);
 134                                 ioc_ack(0, mp, gref);
 135                                 break;
 136                         default:
 137                                 ioc_ack(EINVAL, mp, gref);
 138                                 break;
 139                         }
 140                 } else {
 141                         /* Unknown ioctl */
 142                         ioc_ack(EINVAL, mp, gref);
 143                 }
 144                 break;
 145         default :
 146 #ifdef APPLETALK_DEBUG
 147                 kprintf("unexpected message type in ddp_putmsg: %d/n",
 148                         gbuf_type(mp));
 149 #endif
 150                 gbuf_freem(mp);
 151                 break;
 152         }
 153         return;
 154 } /* ddp_putmsg */
 155
 156 gbuf_t  *ddp_compress_msg(mp)
 157 register gbuf_t *mp;
 158 {
 159         register gbuf_t   *tmp;
 160
 161         while (gbuf_len(mp) == 0) {
 162                 tmp = mp;
 163                 mp = gbuf_cont(mp);
 164                 gbuf_freeb(tmp);
 165
 166                 if (mp == NULL)
 167                         break;
 168         }
 169         return (mp);
 170 }