xnu-792.12.6.tar.gz

[apple/xnu.git] / bsd / netat / ddp_proto.c

/*
 * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
 * 
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */
/*
 *	Copyright (c) 1988, 1989, 1997, 1998 Apple Computer, Inc. 
 *
 *   Modified for MP, 1996 by Tuyen Nguyen
 *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
 */

/* ddp_proto.c: 2.0, 1.23; 10/18/93; Apple Computer, Inc. */

#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <machine/spl.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/fcntl.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

#include <net/if.h>

#include <netat/sysglue.h>
#include <netat/appletalk.h>
#include <netat/at_var.h>
#include <netat/ddp.h>
#include <netat/zip.h>
#include <netat/at_pcb.h>

extern at_ifaddr_t *ifID_home;

void ddp_putmsg(gref, mp)
	gref_t *gref;
	gbuf_t *mp;
{
	u_char socket;
	register ioc_t	*iocbp;
	register int	error;
	at_ddp_t *ddp;

	switch(gbuf_type(mp)) {
	case MSG_DATA :
		/* If this message is going out on a socket that's not bound, 
		 * nail it.
		 */
		ddp = (at_ddp_t *)gbuf_rptr(mp);
		if ((ddp->type == DDP_ATP) || (ddp->type == DDP_ADSP)) {
			if ((gref == 0) || (gref->lport == 0)) {
				int src_addr_included = 
				  ((ddp->type==DDP_ATP) && ddp->src_node)? 1 : 0;
				(void)ddp_output(&mp, ddp->src_socket, 
						 src_addr_included);
				return;
			}
		}

		if (gref && (gref->lport == 0)) {
			gbuf_freel(mp);
			atalk_notify(gref, ENOTCONN);
			return;
		}
		if ((error = ddp_output(&mp, gref->lport, 0)) != 0) {
			if (gref)
				atalk_notify(gref, error);
		}
		return;

	case MSG_IOCTL :
		iocbp = (ioc_t *)gbuf_rptr(mp);
		if (DDP_IOC_MYIOCTL(iocbp->ioc_cmd)) {
			switch(iocbp->ioc_cmd) {
			case DDP_IOC_GET_CFG :
			  /* Note that DDP_IOC_GET_CFG / AppleTalk ddp_config()
			     fills in the net and node of the ddp_addr_t param
			     with the net and node of the default interface, 
			     not the net and node that has been bound, as 
			     getsockname() and sockopt DDP_GETSOCKNAME do.
			  */
#ifdef APPLETALK_DEBUG
				kprintf("ddp_putmsg: DDP_IOC_GET_CFG\n");
#endif
				if (gbuf_cont(mp))
					gbuf_freem(gbuf_cont(mp));
				if ((gbuf_cont(mp) = 
				     gbuf_alloc(sizeof(ddp_addr_t),
						PRI_MED)) == NULL) {
					ioc_ack(ENOBUFS, mp, gref);
					break;
				}
				{
				/* *** was ddp_get_cfg() *** */
				  ddp_addr_t *cfgp = 
				    (ddp_addr_t *)gbuf_rptr(gbuf_cont(mp));
				  cfgp->inet.net = ifID_home->ifThisNode.s_net;
				  cfgp->inet.node = ifID_home->ifThisNode.s_node;
#ifdef NOT_YET
				  cfgp->inet.net = gref->laddr.s_net;
				  cfgp->inet.node = gref->laddr.s_node;
#endif
				  cfgp->inet.socket = gref->lport;
				  cfgp->ddptype = gref->ddptype;
				}
				gbuf_wset(gbuf_cont(mp), sizeof(ddp_addr_t));
				iocbp->ioc_count = sizeof(ddp_addr_t);
				ioc_ack(0, mp, gref);
				break;
			default:
				ioc_ack(EINVAL, mp, gref);
				break;
			}
		} else {
			/* Unknown ioctl */
			ioc_ack(EINVAL, mp, gref);
		}
		break;
	default :
#ifdef APPLETALK_DEBUG
		kprintf("unexpected message type in ddp_putmsg: %d/n", 
			gbuf_type(mp));
#endif
		gbuf_freem(mp);
		break;
	}
	return;
} /* ddp_putmsg */

gbuf_t  *ddp_compress_msg(mp)
register gbuf_t	*mp;
{
        register gbuf_t   *tmp;

        while (gbuf_len(mp) == 0) {
                tmp = mp;
                mp = gbuf_cont(mp);
                gbuf_freeb(tmp);

		if (mp == NULL)
		        break;
	}
	return (mp);
}