bsd/netat/ddp_proto.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) 1988, 1989, 1997, 1998 Apple Computer, Inc.
  32  *
  33  *   Modified for MP, 1996 by Tuyen Nguyen
  34  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  35  */
  36
  37 /* ddp_proto.c: 2.0, 1.23; 10/18/93; Apple Computer, Inc. */
  38
  39 #include <sys/errno.h>
  40 #include <sys/types.h>
  41 #include <sys/param.h>
  42 #include <machine/spl.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/proc.h>
  46 #include <sys/filedesc.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/ioctl.h>
  50 #include <sys/malloc.h>
  51 #include <sys/socket.h>
  52 #include <sys/socketvar.h>
  53
  54 #include <net/if.h>
  55
  56 #include <netat/sysglue.h>
  57 #include <netat/appletalk.h>
  58 #include <netat/at_var.h>
  59 #include <netat/ddp.h>
  60 #include <netat/zip.h>
  61 #include <netat/at_pcb.h>
  62
  63 extern at_ifaddr_t *ifID_home;
  64
  65 void ddp_putmsg(gref, mp)
  66         gref_t *gref;
  67         gbuf_t *mp;
  68 {
  69         u_char socket;
  70         register ioc_t  *iocbp;
  71         register int    error;
  72         at_ddp_t *ddp;
  73
  74         switch(gbuf_type(mp)) {
  75         case MSG_DATA :
  76                 /* If this message is going out on a socket that's not bound,
  77                  * nail it.
  78                  */
  79                 ddp = (at_ddp_t *)gbuf_rptr(mp);
  80                 if ((ddp->type == DDP_ATP) || (ddp->type == DDP_ADSP)) {
  81                         if ((gref == 0) || (gref->lport == 0)) {
  82                                 int src_addr_included =
  83                                   ((ddp->type==DDP_ATP) && ddp->src_node)? 1 : 0;
  84                                 (void)ddp_output(&mp, ddp->src_socket,
  85                                                  src_addr_included);
  86                                 return;
  87                         }
  88                 }
  89
  90                 if (gref && (gref->lport == 0)) {
  91                         gbuf_freel(mp);
  92                         atalk_notify(gref, ENOTCONN);
  93                         return;
  94                 }
  95                 if ((error = ddp_output(&mp, gref->lport, 0)) != 0) {
  96                         if (gref)
  97                                 atalk_notify(gref, error);
  98                 }
  99                 return;
 100
 101         case MSG_IOCTL :
 102                 iocbp = (ioc_t *)gbuf_rptr(mp);
 103                 if (DDP_IOC_MYIOCTL(iocbp->ioc_cmd)) {
 104                         switch(iocbp->ioc_cmd) {
 105                         case DDP_IOC_GET_CFG :
 106                           /* Note that DDP_IOC_GET_CFG / AppleTalk ddp_config()
 107                              fills in the net and node of the ddp_addr_t param
 108                              with the net and node of the default interface,
 109                              not the net and node that has been bound, as
 110                              getsockname() and sockopt DDP_GETSOCKNAME do.
 111                           */
 112 #ifdef APPLETALK_DEBUG
 113                                 kprintf("ddp_putmsg: DDP_IOC_GET_CFG\n");
 114 #endif
 115                                 if (gbuf_cont(mp))
 116                                         gbuf_freem(gbuf_cont(mp));
 117                                 if ((gbuf_cont(mp) =
 118                                      gbuf_alloc(sizeof(ddp_addr_t),
 119                                                 PRI_MED)) == NULL) {
 120                                         ioc_ack(ENOBUFS, mp, gref);
 121                                         break;
 122                                 }
 123                                 {
 124                                 /* *** was ddp_get_cfg() *** */
 125                                   ddp_addr_t *cfgp =
 126                                     (ddp_addr_t *)gbuf_rptr(gbuf_cont(mp));
 127                                   cfgp->inet.net = ifID_home->ifThisNode.s_net;
 128                                   cfgp->inet.node = ifID_home->ifThisNode.s_node;
 129 #ifdef NOT_YET
 130                                   cfgp->inet.net = gref->laddr.s_net;
 131                                   cfgp->inet.node = gref->laddr.s_node;
 132 #endif
 133                                   cfgp->inet.socket = gref->lport;
 134                                   cfgp->ddptype = gref->ddptype;
 135                                 }
 136                                 gbuf_wset(gbuf_cont(mp), sizeof(ddp_addr_t));
 137                                 iocbp->ioc_count = sizeof(ddp_addr_t);
 138                                 ioc_ack(0, mp, gref);
 139                                 break;
 140                         default:
 141                                 ioc_ack(EINVAL, mp, gref);
 142                                 break;
 143                         }
 144                 } else {
 145                         /* Unknown ioctl */
 146                         ioc_ack(EINVAL, mp, gref);
 147                 }
 148                 break;
 149         default :
 150 #ifdef APPLETALK_DEBUG
 151                 kprintf("unexpected message type in ddp_putmsg: %d/n",
 152                         gbuf_type(mp));
 153 #endif
 154                 gbuf_freem(mp);
 155                 break;
 156         }
 157         return;
 158 } /* ddp_putmsg */
 159
 160 gbuf_t  *ddp_compress_msg(mp)
 161 register gbuf_t *mp;
 162 {
 163         register gbuf_t   *tmp;
 164
 165         while (gbuf_len(mp) == 0) {
 166                 tmp = mp;
 167                 mp = gbuf_cont(mp);
 168                 gbuf_freeb(tmp);
 169
 170                 if (mp == NULL)
 171                         break;
 172         }
 173         return (mp);
 174 }