bsd/netat/ddp_proto.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) 1988, 1989, 1997, 1998 Apple Computer, Inc.
  24  *
  25  *   Modified for MP, 1996 by Tuyen Nguyen
  26  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  27  */
  28
  29 /* ddp_proto.c: 2.0, 1.23; 10/18/93; Apple Computer, Inc. */
  30
  31 #include <sys/errno.h>
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <machine/spl.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/filedesc.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/ioctl.h>
  42 #include <sys/malloc.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/buf.h>
  46
  47 #include <net/if.h>
  48
  49 #include <netat/sysglue.h>
  50 #include <netat/appletalk.h>
  51 #include <netat/at_var.h>
  52 #include <netat/ddp.h>
  53 #include <netat/zip.h>
  54 #include <netat/at_pcb.h>
  55
  56 extern at_ifaddr_t *ifID_home;
  57
  58 void ddp_putmsg(gref, mp)
  59         gref_t *gref;
  60         gbuf_t *mp;
  61 {
  62         u_char socket;
  63         register ioc_t  *iocbp;
  64         register int    error;
  65         at_ddp_t *ddp;
  66
  67         switch(gbuf_type(mp)) {
  68         case MSG_DATA :
  69                 /* If this message is going out on a socket that's not bound,
  70                  * nail it.
  71                  */
  72                 ddp = (at_ddp_t *)gbuf_rptr(mp);
  73                 if ((ddp->type == DDP_ATP) || (ddp->type == DDP_ADSP)) {
  74                         if ((gref == 0) || (gref->lport == 0)) {
  75                                 int src_addr_included =
  76                                   ((ddp->type==DDP_ATP) && ddp->src_node)? 1 : 0;
  77                                 (void)ddp_output(&mp, ddp->src_socket,
  78                                                  src_addr_included);
  79                                 return;
  80                         }
  81                 }
  82
  83                 if (gref && (gref->lport == 0)) {
  84                         gbuf_freel(mp);
  85                         atalk_notify(gref, ENOTCONN);
  86                         return;
  87                 }
  88                 if ((error = ddp_output(&mp, gref->lport, 0)) != 0) {
  89                         if (gref)
  90                                 atalk_notify(gref, error);
  91                 }
  92                 return;
  93
  94         case MSG_IOCTL :
  95                 iocbp = (ioc_t *)gbuf_rptr(mp);
  96                 if (DDP_IOC_MYIOCTL(iocbp->ioc_cmd)) {
  97                         switch(iocbp->ioc_cmd) {
  98                         case DDP_IOC_GET_CFG :
  99                           /* Note that DDP_IOC_GET_CFG / AppleTalk ddp_config()
 100                              fills in the net and node of the ddp_addr_t param
 101                              with the net and node of the default interface,
 102                              not the net and node that has been bound, as
 103                              getsockname() and sockopt DDP_GETSOCKNAME do.
 104                           */
 105 #ifdef APPLETALK_DEBUG
 106                                 kprintf("ddp_putmsg: DDP_IOC_GET_CFG\n");
 107 #endif
 108                                 if (gbuf_cont(mp))
 109                                         gbuf_freem(gbuf_cont(mp));
 110                                 if ((gbuf_cont(mp) =
 111                                      gbuf_alloc(sizeof(ddp_addr_t),
 112                                                 PRI_MED)) == NULL) {
 113                                         ioc_ack(ENOBUFS, mp, gref);
 114                                         break;
 115                                 }
 116                                 {
 117                                 /* *** was ddp_get_cfg() *** */
 118                                   ddp_addr_t *cfgp =
 119                                     (ddp_addr_t *)gbuf_rptr(gbuf_cont(mp));
 120                                   cfgp->inet.net = ifID_home->ifThisNode.s_net;
 121                                   cfgp->inet.node = ifID_home->ifThisNode.s_node;
 122 #ifdef NOT_YET
 123                                   cfgp->inet.net = gref->laddr.s_net;
 124                                   cfgp->inet.node = gref->laddr.s_node;
 125 #endif
 126                                   cfgp->inet.socket = gref->lport;
 127                                   cfgp->ddptype = gref->ddptype;
 128                                 }
 129                                 gbuf_wset(gbuf_cont(mp), sizeof(ddp_addr_t));
 130                                 iocbp->ioc_count = sizeof(ddp_addr_t);
 131                                 ioc_ack(0, mp, gref);
 132                                 break;
 133                         default:
 134                                 ioc_ack(EINVAL, mp, gref);
 135                                 break;
 136                         }
 137                 } else {
 138                         /* Unknown ioctl */
 139                         ioc_ack(EINVAL, mp, gref);
 140                 }
 141                 break;
 142         default :
 143 #ifdef APPLETALK_DEBUG
 144                 kprintf("unexpected message type in ddp_putmsg: %d/n",
 145                         gbuf_type(mp));
 146 #endif
 147                 gbuf_freem(mp);
 148                 break;
 149         }
 150         return;
 151 } /* ddp_putmsg */
 152
 153 gbuf_t  *ddp_compress_msg(mp)
 154 register gbuf_t *mp;
 155 {
 156         register gbuf_t   *tmp;
 157
 158         while (gbuf_len(mp) == 0) {
 159                 tmp = mp;
 160                 mp = gbuf_cont(mp);
 161                 gbuf_freeb(tmp);
 162
 163                 if (mp == NULL)
 164                         break;
 165         }
 166         return (mp);
 167 }