bsd/netat/ddp_proto.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) 1988, 1989, 1997, 1998 Apple Computer, Inc.
  30  *
  31  *   Modified for MP, 1996 by Tuyen Nguyen
  32  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  33  */
  34
  35 /* ddp_proto.c: 2.0, 1.23; 10/18/93; Apple Computer, Inc. */
  36
  37 #include <sys/errno.h>
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <machine/spl.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/proc.h>
  44 #include <sys/filedesc.h>
  45 #include <sys/fcntl.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/ioctl.h>
  48 #include <sys/malloc.h>
  49 #include <sys/socket.h>
  50 #include <sys/socketvar.h>
  51
  52 #include <net/if.h>
  53
  54 #include <netat/sysglue.h>
  55 #include <netat/appletalk.h>
  56 #include <netat/at_var.h>
  57 #include <netat/ddp.h>
  58 #include <netat/zip.h>
  59 #include <netat/at_pcb.h>
  60
  61 extern at_ifaddr_t *ifID_home;
  62
  63 void ddp_putmsg(gref, mp)
  64         gref_t *gref;
  65         gbuf_t *mp;
  66 {
  67         u_char socket;
  68         register ioc_t  *iocbp;
  69         register int    error;
  70         at_ddp_t *ddp;
  71
  72         switch(gbuf_type(mp)) {
  73         case MSG_DATA :
  74                 /* If this message is going out on a socket that's not bound,
  75                  * nail it.
  76                  */
  77                 ddp = (at_ddp_t *)gbuf_rptr(mp);
  78                 if ((ddp->type == DDP_ATP) || (ddp->type == DDP_ADSP)) {
  79                         if ((gref == 0) || (gref->lport == 0)) {
  80                                 int src_addr_included =
  81                                   ((ddp->type==DDP_ATP) && ddp->src_node)? 1 : 0;
  82                                 (void)ddp_output(&mp, ddp->src_socket,
  83                                                  src_addr_included);
  84                                 return;
  85                         }
  86                 }
  87
  88                 if ((gref == 0) || (gref->lport == 0)) {
  89                         gbuf_freel(mp);
  90                         if (gref)
  91                                 atalk_notify(gref, ENOTCONN);
  92                         return;
  93                 }
  94                 if ((error = ddp_output(&mp, gref->lport, 0)) != 0) {
  95                         if (gref)
  96                                 atalk_notify(gref, error);
  97                 }
  98                 return;
  99
 100         case MSG_IOCTL :
 101                 iocbp = (ioc_t *)gbuf_rptr(mp);
 102                 if (DDP_IOC_MYIOCTL(iocbp->ioc_cmd)) {
 103                         switch(iocbp->ioc_cmd) {
 104                         case DDP_IOC_GET_CFG :
 105                           /* Note that DDP_IOC_GET_CFG / AppleTalk ddp_config()
 106                              fills in the net and node of the ddp_addr_t param
 107                              with the net and node of the default interface,
 108                              not the net and node that has been bound, as
 109                              getsockname() and sockopt DDP_GETSOCKNAME do.
 110                           */
 111 #ifdef APPLETALK_DEBUG
 112                                 kprintf("ddp_putmsg: DDP_IOC_GET_CFG\n");
 113 #endif
 114                                 if (gbuf_cont(mp))
 115                                         gbuf_freem(gbuf_cont(mp));
 116                                 if ((gbuf_cont(mp) =
 117                                      gbuf_alloc(sizeof(ddp_addr_t),
 118                                                 PRI_MED)) == NULL) {
 119                                         ioc_ack(ENOBUFS, mp, gref);
 120                                         break;
 121                                 }
 122                                 {
 123                                 /* *** was ddp_get_cfg() *** */
 124                                   ddp_addr_t *cfgp =
 125                                     (ddp_addr_t *)gbuf_rptr(gbuf_cont(mp));
 126                                   cfgp->inet.net = ifID_home->ifThisNode.s_net;
 127                                   cfgp->inet.node = ifID_home->ifThisNode.s_node;
 128 #ifdef NOT_YET
 129                                   cfgp->inet.net = gref->laddr.s_net;
 130                                   cfgp->inet.node = gref->laddr.s_node;
 131 #endif
 132                                   cfgp->inet.socket = gref->lport;
 133                                   cfgp->ddptype = gref->ddptype;
 134                                 }
 135                                 gbuf_wset(gbuf_cont(mp), sizeof(ddp_addr_t));
 136                                 iocbp->ioc_count = sizeof(ddp_addr_t);
 137                                 ioc_ack(0, mp, gref);
 138                                 break;
 139                         default:
 140                                 ioc_ack(EINVAL, mp, gref);
 141                                 break;
 142                         }
 143                 } else {
 144                         /* Unknown ioctl */
 145                         ioc_ack(EINVAL, mp, gref);
 146                 }
 147                 break;
 148         default :
 149 #ifdef APPLETALK_DEBUG
 150                 kprintf("unexpected message type in ddp_putmsg: %d/n",
 151                         gbuf_type(mp));
 152 #endif
 153                 gbuf_freem(mp);
 154                 break;
 155         }
 156         return;
 157 } /* ddp_putmsg */
 158
 159 gbuf_t  *ddp_compress_msg(mp)
 160 register gbuf_t *mp;
 161 {
 162         register gbuf_t   *tmp;
 163
 164         while (gbuf_len(mp) == 0) {
 165                 tmp = mp;
 166                 mp = gbuf_cont(mp);
 167                 gbuf_freeb(tmp);
 168
 169                 if (mp == NULL)
 170                         break;
 171         }
 172         return (mp);
 173 }