/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_HEADER_END@
 */
/*
 *	Copyright (c) 1996 Apple Computer, Inc. 
 *
 *		Created April 8, 1996 by Tuyen Nguyen
 *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
 *
 *	File: misc.c
 */
#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/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/rtmp.h>
#include <netat/routing_tables.h>
#include <netat/at_pcb.h>
#include <netat/aurp.h>
#include <netat/debug.h>

/* */
void AURPiocack(gref, m)
	gref_t *gref;
	gbuf_t *m;
{
	/* send ok reply to ioctl command */
	gbuf_set_type(m, MSG_IOCACK);
	atalk_putnext(gref, m);
}

void AURPiocnak(gref, m, error)
	gref_t *gref;
	gbuf_t *m;
	int error;
{
	ioc_t *iocbp = (ioc_t *)gbuf_rptr(m);

	/* send error reply to ioctl command */
	if (gbuf_cont(m)) {
        gbuf_freem(gbuf_cont(m));
        gbuf_cont(m) = 0;
	}
	iocbp->ioc_error = error;
	iocbp->ioc_count = 0;
	iocbp->ioc_rval = -1;
	gbuf_set_type(m, MSG_IOCNAK);
	atalk_putnext(gref, m);
}

/* */
void AURPupdate(arg)
	void *arg;
{
	unsigned char node;
	boolean_t 	funnel_state;
        aurp_state_t *state;
        
	funnel_state = thread_funnel_set(network_flock, TRUE);
	
        state = (aurp_state_t *)&aurp_state[1];

	if (aurp_gref == 0) {
                (void) thread_funnel_set(network_flock, FALSE);
		return;
        }
	/*
	 * for every tunnel peer, do the following periodically:
	 * 1. send zone requests to determine zone names of networks
	 *    that still do not have asssociated zone names.
	 * 2. send any RI update that are pending
	 */
	for (node=1; node <= dst_addr_cnt; node++, state++) {
		AURPsndZReq(state);
		AURPsndRIUpd(state);
	}

	/* restart the periodic update timer */
	timeout(AURPupdate, arg, AURP_UpdateRate*10*HZ);
	update_tmo = 1;
        
        (void) thread_funnel_set(network_flock, FALSE);
}

/* */
void AURPfreemsg(m)
	gbuf_t *m;
{
	gbuf_t *tmp_m;

	while ((tmp_m = m) != 0) {
		m = gbuf_next(m);
		gbuf_next(tmp_m) = 0;
		gbuf_freem(tmp_m);
	}
}

/* */
int AURPinit()
{
	unsigned char node;
	aurp_state_t *state = (aurp_state_t *)&aurp_state[1];
	short entry_num;
	RT_entry *entry = (RT_entry *)RT_table;

	/* start the periodic update timer */
	timeout(AURPupdate, 0, AURP_UpdateRate*10*HZ);
	update_tmo = 1;

	/* initialize AURP flags for entries in the RT table */
	for (entry_num=0; entry_num < RT_maxentry; entry_num++,entry++)
		entry->AURPFlag = 0;

	/* initiate connections to peers */
	for (node=1; node <= dst_addr_cnt; node++, state++) {
		bzero((char *)state, sizeof(*state));
		state->rem_node = node;
		state->snd_state = AURPSTATE_Unconnected;
		state->rcv_state = AURPSTATE_Unconnected;
		dPrintf(D_M_AURP, D_L_STARTUP_INFO,
			("AURPinit: sending OpenReq to node %u\n", node));
		AURPsndOpenReq(state);
	}

	return 0;
}

/* */
void AURPcleanup(state)
	aurp_state_t *state;
{
	if (state->rsp_m) {
		gbuf_freem(state->rsp_m);
		state->rsp_m = 0;
	}

	if (state->upd_m) {
		gbuf_freem(state->upd_m);
		state->upd_m = 0;
	}
}

/*
 *
 */
void AURPshutdown()
{
	unsigned char node;
	aurp_state_t *state = (aurp_state_t *)&aurp_state[1];

	/* cancel the periodic update timer */
	untimeout(AURPupdate, 0);
	update_tmo = 0;

	/* notify tunnel peers of router going-down */
	for (node=1; node <= dst_addr_cnt; node++, state++) {
		AURPcleanup(state);
		AURPsndRDReq(state);
	}

	/* bring down the router */ 
	aurp_wakeup(NULL, (caddr_t) AE_SHUTDOWN, 0);
}

void AURPaccess()
{
	unsigned char i;
	short entry_num;
	RT_entry *entry;

		entry = (RT_entry *)RT_table;
		for (entry_num=0; entry_num < RT_maxentry; entry_num++,entry++)
			entry->AURPFlag = net_export ? AURP_NetHiden : 0;

	for (i=0; i < net_access_cnt; i++) {
		/* export or hide networks as configured */
		if ((entry = rt_blookup(net_access[i])) != 0)
			entry->AURPFlag = net_export ? 0 : AURP_NetHiden;
	}
}
