/*
 * The Spread Toolkit.
 *     
 * The contents of this file are subject to the Spread Open-Source
 * License, Version 1.0 (the ``License''); you may not use
 * this file except in compliance with the License.  You may obtain a
 * copy of the License at:
 *
 * http://www.spread.org/license/
 *
 * or in the file ``license.txt'' found in this distribution.
 *
 * Software distributed under the License is distributed on an AS IS basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the 
 * License.
 *
 * The Creators of Spread are:
 *  Yair Amir, Michal Miskin-Amir, Jonathan Stanton.
 *
 *  Copyright (C) 1993-2004 Spread Concepts LLC <spread@spreadconcepts.com>
 *
 *  All Rights Reserved.
 *
 * Major Contributor(s):
 * ---------------
 *    Cristina Nita-Rotaru crisn@cs.purdue.edu - group communication security.
 *    Theo Schlossnagle    jesus@omniti.com - Perl, skiplists, autoconf.
 *    Dan Schoenblum       dansch@cnds.jhu.edu - Java interface.
 *    John Schultz         jschultz@cnds.jhu.edu - contribution to process group membership.
 *
 */


#include <assert.h>
#include "arch.h"
#include "spread_params.h"
#include "network.h"
#include "net_types.h"
#include "data_link.h"
#include "sp_events.h"
#include "status.h"
#include "alarm.h"
#include "configuration.h"

/* for Memb_print_form_token() */
#include "membership.h"

static	channel		Bcast_channel[MAX_INTERFACES_PROC];
static  channel		Token_channel[MAX_INTERFACES_PROC];
static	channel		Send_channel;

static  int             Num_bcast_channels;
static  int             Num_token_channels;

static	int		Bcast_needed;
static	int32		Bcast_address;
static	int16		Bcast_port;

static	int		Num_send_needed;
static  int32		Send_address[MAX_SEGMENTS];
static	int16		Send_ports[MAX_SEGMENTS];

/* ### Pack: 3 lines */
/* Global in function so both Net_queue_bcast and Net_flush_bcast can access them */
static  sys_scatter     Queue_scat;
static  int             Queued_bytes = 0;
static  const char      align_padding[4] = "padd";

/* address for token sending - which is always needed */
static	int32		Token_address;
static	int16		Token_port;

static	configuration	Net_membership;
static	int		Segment_leader;

static 	configuration	Cn;
static	proc		My;
static	segment 	My_seg;

static	int16		Partition[MAX_PROCS_RING];
static	sp_time		Partition_timeout 	= { 60, 0};
static	int		My_index;

static	void		Clear_partition(int dummy, void *dummy_p);
static	int		In_my_component( int32	proc_id );
static	void		Flip_pack( packet_header *pack_ptr );
static	void		Flip_token( token_header *token_ptr );


void	Net_init()
{
	proc		dummy_proc;
        int32u          interface_addr;
        int             i;
        bool            bcast_bound = FALSE;

	Cn = Conf();
	My = Conf_my();

	My_index = Conf_proc_by_id( My.id, &dummy_proc );
	Clear_partition(0, NULL);

	if( Cn.segments[My.seg_index].num_procs > 1 )
	{
		/* I am not allone in segment */
		Bcast_needed  = 1;
		Bcast_address = Cn.segments[My.seg_index].bcast_address;
		Bcast_port    = My.port;

		Alarm( NETWORK, "Net_init: Bcast needed to address (%d, %d)\n",
			Bcast_address, Bcast_port );
	}else{
		Bcast_needed  = 0;
		Bcast_address = 0;
		Alarm( NETWORK, "Net_init: Bcast is not needed\n" );
	}

        /* To receive broadcast (and possibly multicast) packets on a socket
         * bound to a specific interface, we also have to bind to the broadcast
         * address on the interface as well as the unicast interface. That is 
         * what the double bind of the bcast_address does.
         */
        for ( i=0; i < My.num_if; i++)
        {
                if (Is_IfType_Daemon( My.ifc[i].type ) || Is_IfType_Any( My.ifc[i].type ) )
                {
                        if (Is_IfType_Any( My.ifc[i].type ) )
                                interface_addr = 0;
                        else {
                                interface_addr = My.ifc[i].ip;
                                if (Bcast_needed && !bcast_bound) {
#ifndef ARCH_PC_WIN95
                                    Bcast_channel[Num_bcast_channels++] = DL_init_channel( RECV_CHANNEL, My.port, Bcast_address, Bcast_address );
#endif
                                    bcast_bound = TRUE;
                                }
                        }
                        Bcast_channel[Num_bcast_channels++] = DL_init_channel( RECV_CHANNEL, My.port, Bcast_address, interface_addr );
                        Token_channel[Num_token_channels++] = DL_init_channel( RECV_CHANNEL, My.port+1, 0, interface_addr );
                }
        }

	Send_channel  = DL_init_channel( SEND_CHANNEL, My.port+2, 0, My.id );

	Num_send_needed = 0;
}

void	Net_set_membership( configuration memb )
{
	int	i;
	int	my_index_in_seg;
	int	my_next_index;

	Net_membership = memb;
	My_seg = Net_membership.segments[My.seg_index];
	my_index_in_seg = Conf_id_in_seg( &My_seg, My.id );
	if( my_index_in_seg < 0 )
		Alarm( EXIT,"Net_set_membership: I am not in membership %c",
			Conf_print( &Net_membership ) );
	else if( my_index_in_seg == 0) {
		Segment_leader = 1;
		Alarm( NETWORK,"Net_set_membership: I am a Segment leader\n");
	} else  Segment_leader = 0;

	Num_send_needed = 0;
	my_next_index = -1;
	for( i=0; i < Conf().num_segments; i++ )
	{
	    if( i == My.seg_index )
	    {
		/* 
		 * This is my segment.
		 * There is no need to send to it
		 * but I need my_next_index to calculate
		 * the token send address.
		 */
		my_next_index = Num_send_needed;

	    } else if( Net_membership.segments[i].num_procs > 0 ) {

		Send_address[Num_send_needed] = Net_membership.segments[i].procs[0]->id;
		Send_ports  [Num_send_needed] = Net_membership.segments[i].port;

		Num_send_needed++;
	    }
	}
	assert(my_next_index != -1);
	for( i=0; i < Num_send_needed; i++ )
		Alarm( NETWORK, 
			"Net_set_membership: Send_addr[%d] is (%d,%d)\n",
			i, Send_address[i], Send_ports[i] );

	/* Calculate where to send the token */
	Token_address = 0;
	if( my_index_in_seg < My_seg.num_procs-1 )
	{
		Token_address = My_seg.procs[my_index_in_seg+1]->id;
		Token_port    = My_seg.port+1;
	}else{
		/* I am last in my segment */
		if( Num_send_needed == 0 )
		{
			/* 
			 * My segment is the only segment
			 * sending token to the first in my segment 
			 */
			Token_address = My_seg.procs[0]->id;
			Token_port    = My_seg.port+1;
		} else if( Num_send_needed == my_next_index ) {
			/* 
			 * My segment is the last segment
			 * sending token to the first in first valid segment
			 */	
			Token_address = Send_address[0];
			Token_port    = Send_ports[0]+1;
		} else {
			/*
			 * There is a valid segment after mine
			 * sending token to the first in next valid segment
			 */
			Token_address = Send_address[my_next_index];
			Token_port    = Send_ports[my_next_index]+1;
		}

	}
	Alarm( NETWORK, "Net_set_membership: Token_address : (%d, %d)\n",
			Token_address, Token_port );
}

int	Net_bcast( sys_scatter *scat )
{
	packet_header	*pack_ptr;
	int 		i;
	int		ret;

	ret = 0;
	/* routing on channels if needed according to membership */
	pack_ptr = (packet_header *)scat->elements[0].buf;
	pack_ptr->type  = Set_routed( pack_ptr->type );
	pack_ptr->type  = Set_endian( pack_ptr->type );
	pack_ptr->transmiter_id = My.id;
	for ( i=0; i< Num_send_needed; i++ )
	{
	    ret = DL_send( Send_channel, Send_address[i], Send_ports[i], scat );
	}
	pack_ptr->type = Clear_routed( pack_ptr->type );

	/* broadcasting if needed according to configuration */
	if( Bcast_needed )
	{	
	    ret = DL_send( Send_channel, Bcast_address, Bcast_port, scat );
	}

        if( !Bcast_needed && (Num_send_needed == 0) )
            ret = 1; /* No actual send is needed, but 'packet' can be considered 'sent' */

	return( ret );
}

/* ### Pack: 2 routines */
int	Net_queue_bcast( sys_scatter *scat )
{
	packet_header	*pack_ptr;
        int             new_bytes;
	int 		i, j;
        int             ret;
        int             align_bytes, align_num_scatter;

        /* This line is redundent because of static initialization to 0 */
        if ( Queued_bytes == 0 ) Queue_scat.num_elements = 0;

        ret = 0;
        new_bytes = 0;

        for ( i=0; i < scat->num_elements; i++) {
                new_bytes += scat->elements[i].len;
        }
        /* Fix alignment of packed messages  so they will each begin on a 4 byte alignment 
         * This is needed for Sparc, might need enhancement if other archs 
         * have more extensive alignement rules
         */
        align_bytes = 0;
        align_num_scatter = 0;
        switch(Queued_bytes % 4) {
        case 1:
                align_bytes++;
        case 2:
                align_bytes++;
        case 3:
                align_bytes++;
                align_num_scatter = 1;
        case 0:
                /* nothing since already aligned */
                break; 
        }

        if ( ( (Queued_bytes + new_bytes + align_bytes)  >  MAX_PACKET_SIZE ) ||
             ( (Queue_scat.num_elements + scat->num_elements + align_num_scatter) > ARCH_SCATTER_SIZE ) )
        {
                ret = Net_flush_bcast();
                align_bytes = 0;
                align_num_scatter = 0;
        }

        if ( Queued_bytes == 0 ) {
                /* routing on channels if needed according to membership */
                pack_ptr = (packet_header *)scat->elements[0].buf;
                pack_ptr->type  = Set_routed( pack_ptr->type );
                pack_ptr->type  = Set_endian( pack_ptr->type );
                pack_ptr->transmiter_id = My.id;
        }

        if ( align_bytes > 0 )
        {
                Queue_scat.elements[Queue_scat.num_elements].len = align_bytes;
                Queue_scat.elements[Queue_scat.num_elements].buf = (char *)align_padding;

                Queued_bytes += align_bytes;
                Queue_scat.num_elements += 1;
                Alarm(NETWORK, "Net_queue_bcast: Inserted padding of %d bytes to message of size %d\n", align_bytes, new_bytes );
        }

        /* Add new packet to Queue_scat to be sent as packed packet */
        for ( i=0, j=Queue_scat.num_elements; i < scat->num_elements; i++, j++) {
                Queue_scat.elements[j].len = scat->elements[i].len;
                Queue_scat.elements[j].buf = scat->elements[i].buf;
        }
        Queued_bytes += new_bytes;
        Queue_scat.num_elements += scat->num_elements ;
        
	return( ret );
}

int     Net_flush_bcast(void)
{
        packet_header   *pack_ptr;
        int             i;
        int             ret;

        if (Queued_bytes == 0 ) return( 0 );
        
        Alarm(NETWORK, "Net_flush_bcast: Flushing with Queued_bytes = %d; num_elements in scat = %d; size of scat0,1 = %d %d\n", Queued_bytes, Queue_scat.num_elements, Queue_scat.elements[0].len, Queue_scat.elements[1].len);
        
        ret = 0;

        for ( i=0; i< Num_send_needed; i++ )
        {
                ret = DL_send( Send_channel, Send_address[i], Send_ports[i], &Queue_scat );
        }
        pack_ptr = (packet_header *)Queue_scat.elements[0].buf; 
	pack_ptr->type = Clear_routed( pack_ptr->type );

        /* broadcasting if needed according to configuration */
        if( Bcast_needed )
        {	
                ret = DL_send( Send_channel, Bcast_address, Bcast_port, &Queue_scat );
        }

        if( !Bcast_needed && (Num_send_needed == 0) )
            ret = 1; /* No actual send is needed, but 'packet' can be considered 'sent' */

        Queue_scat.num_elements = 0;
        Queued_bytes = 0;
        return( ret );
}

int	Net_scast( int16 seg_index, sys_scatter *scat )
{
	packet_header	*pack_ptr;
	int		ret;
        bool            send_not_needed_p = FALSE;

	ret = 0;
	pack_ptr = (packet_header *)scat->elements[0].buf;
	pack_ptr->type = Set_endian( pack_ptr->type );
	pack_ptr->transmiter_id = My.id;
	if( seg_index == My.seg_index )
	{
	    if( Bcast_needed )
	    {
	    	ret = DL_send( Send_channel, Bcast_address, Bcast_port, scat );
	    } else 
                send_not_needed_p = TRUE;
	}else{
	    if( Net_membership.segments[seg_index].num_procs > 0 )
	    {
		pack_ptr->type = Set_routed( pack_ptr->type );
	    	ret = DL_send( Send_channel, 
			Net_membership.segments[seg_index].procs[0]->id,
			Net_membership.segments[seg_index].port,
			scat );
		pack_ptr->type = Clear_routed( pack_ptr->type );
	    } else
                send_not_needed_p = TRUE;
	}

        if (send_not_needed_p)
            ret = 1; /* notify that packet can be considered sent, even though no network send actually needed */

	return( ret );
}

int	Net_ucast( int32 proc_id, sys_scatter *scat )
{
	packet_header	*pack_ptr;
	proc		p;
	int		ret;

	pack_ptr = (packet_header *)scat->elements[0].buf;
	pack_ptr->type = Set_endian( pack_ptr->type );
	pack_ptr->transmiter_id = My.id;
	ret = Conf_proc_by_id( proc_id, &p );
	if( ret < 0 )
	{
		Alarm( PRINT, "Net_ucast: non existing proc_id %d\n",proc_id );
		return( ret );
	}
	ret = DL_send( Send_channel, proc_id, p.port, scat );
	return( ret );
}

int	Net_recv ( channel fd, sys_scatter *scat )
{
static	scatter		save;
	packet_header	*pack_ptr;
	int		bytes_left;
	int		received_bytes, body_offset;
	int		processed_bytes;
	int		pack_same_endian;
	int		i;
        bool            ch_found;

	pack_ptr = (packet_header *)scat->elements[0].buf;

        ch_found = FALSE;
        for (i = 0 ; i < Num_bcast_channels; i++) {
            if ( fd == Bcast_channel[i]) {
                ch_found = TRUE; 
                break;
            }
        }
        if (ch_found == FALSE) {
            Alarm(EXIT, "Net_recv: Listening and received packet on un-used interface %d\n", fd);
        }

	received_bytes = DL_recv( fd, scat ); 

	if( received_bytes <= 0 ) return( received_bytes );

	if( received_bytes < sizeof( packet_header ) ) 
	{
		Alarm(PRINT, "Net_recv: ignoring packet of size %d, smaller than packet header size %d\n", 
			received_bytes, sizeof(packet_header) );
		return( -1 );
	}

	/* Fliping packet header to my form if needed */
	if( !Same_endian( pack_ptr->type ) ) Flip_pack( pack_ptr );

	if( Is_partition( pack_ptr->type ) )
	{
		/* Monitor : updating partition */
		int16	*cur_partition;

                if ( ! Conf_get_dangerous_monitor_state() ) {
                        Alarm( PRINT, "Net_recv: Request to set partition or kill daemons from (%d.%d.%d.%d) denied. Monitor in safe mode\n", IP1(pack_ptr->proc_id), IP2(pack_ptr->proc_id), IP3(pack_ptr->proc_id), IP4(pack_ptr->proc_id) );
                        return( 0 );
                }

		if( ! ( pack_ptr->memb_id.proc_id == 15051963 && Conf_id_in_conf( &Cn, pack_ptr->proc_id ) != -1  ) ) return( 0 );

		cur_partition = (int16 *)scat->elements[1].buf;

		for( i=0; i < Conf_num_procs( &Cn ); i++ )
		    if( Same_endian( pack_ptr->type ) ) Partition[i] = cur_partition[i];
		    else Partition[i] = Flip_int16( cur_partition[i] );

		E_queue( Clear_partition, 0, NULL, Partition_timeout );
		if( Partition[My_index] < 0 )
		    Alarm( EXIT, "Net_recv: Instructed to exit by monitor\n");
		Alarm( PRINT  , "Net_recv: Got monitor message, component %d\n", 
			Partition[My_index] );

		return( 0 );
	} 

	/* Monitor : droping packet from other monitor components */
	if( ! ( pack_ptr->memb_id.proc_id == 15051963 || In_my_component( pack_ptr->transmiter_id ) ) )
		return( 0 );

	/* no need to return my own packets */
	if( pack_ptr->transmiter_id == My.id )
		return( 0 );

	if( Bcast_needed && Is_routed( pack_ptr->type ) )
	{
		if( !Segment_leader ) Alarm( NETWORK, 
		"Net_recv: recv routed message from %d but not seg leader\n",
			pack_ptr->proc_id);

		/* saving scat lens for another DL_recv */
		save.num_elements = scat->num_elements;
		for( i=0; i < save.num_elements; i++ )
			save.elements[i].len = scat->elements[i].len;

		/* computing true scat lens for sending */
		bytes_left = received_bytes;
		i = 0;
		while ( bytes_left > 0 )
		{
			if( bytes_left < scat->elements[i].len )
				scat->elements[i].len = bytes_left;
			bytes_left -=  scat->elements[i].len;			
			i ++;
		}
		scat->num_elements = i;

		pack_ptr->type = Clear_routed ( pack_ptr->type );
		pack_ptr->transmiter_id = My.id;

		/* fliping to original form */
		if( !Same_endian( pack_ptr->type ) ) Flip_pack( pack_ptr );
		DL_send( Send_channel, Bcast_address, Bcast_port, scat );
		/* re-fliping to my form */
		if( !Same_endian( pack_ptr->type ) ) Flip_pack( pack_ptr );

		/* restoring scat lens for another DL_recv */
		scat->num_elements = save.num_elements;
		for( i=0; i < save.num_elements; i++ )
			scat->elements[i].len = save.elements[i].len;

	}
	/*
	 * we clear routed anyway in order not to ask if Bcast_needed again.
	 * This way, if bcast is not needed we give it to the upper layer
	 * right away. It will always get to the upper layer with this
	 * bit cleared.
	 */
	pack_ptr->type = Clear_routed ( pack_ptr->type );

	/* 
	 * Check validity of packet size and flip every packet header 
	 * other than first header (which is already flipped).
	 * If packet size is not valid, return -1, otherwise 
	 * return size of received packet.
	 */
	processed_bytes = sizeof( packet_header ) + pack_ptr->data_len;
	pack_same_endian = Same_endian( pack_ptr->type );
        /* ignore any alignment padding */
        if ( processed_bytes < received_bytes ) {
                switch(processed_bytes % 4)
                {
                case 1:
                        processed_bytes++;
                case 2:
                        processed_bytes++;
                case 3:
                        processed_bytes++;
                case 0:
                        /* already aligned */
                        break;
                }
        }
	while( processed_bytes < received_bytes )
	{
                body_offset = processed_bytes - sizeof(packet_header); 
                pack_ptr = (packet_header *)&scat->elements[1].buf[body_offset];

                /* flip contigues packet header */
		if( !pack_same_endian  ) {
                        Flip_pack( pack_ptr );
		}

		processed_bytes += sizeof( packet_header ) + pack_ptr->data_len;
                /* ignore any alignment padding */
                if ( processed_bytes < received_bytes ) {
                        switch(processed_bytes % 4)
                        {
                        case 1:
                                processed_bytes++;
                        case 2:
                                processed_bytes++;
                        case 3:
                                processed_bytes++;
                        case 0:
                                /* already aligned */
                                break;
                        }
                }
	}                
        Alarm( NETWORK, "Net_recv: Received Packet - packet length(%d), packed message length(%d)\n", received_bytes, processed_bytes);
	if( processed_bytes != received_bytes ) {
                Alarm( PRINT, "Net_recv: Received Packet - packet length(%d) != packed message length(%d)\n", received_bytes, processed_bytes);
                return( -1 );
        }
	return( received_bytes );
}

int	Net_send_token( sys_scatter *scat )
{
	token_header	*token_ptr;
	int		ret;

	token_ptr = (token_header *)scat->elements[0].buf;
	token_ptr->type = Set_endian( token_ptr->type );
	token_ptr->transmiter_id = My.id;

        if ( token_ptr->rtr_len > (MAX_PACKET_SIZE - sizeof(token_header) ) )
        {
            if ( Is_form( token_ptr->type ) )
                Memb_print_form_token( scat );
            Alarmp( SPLOG_FATAL, PRINT, "Net_send_token: Token too long for packet!\n");
        }

	ret = DL_send( Send_channel, Token_address, Token_port, scat );
	return ( ret );
}

int	Net_recv_token( channel fd, sys_scatter *scat )
{
	token_header	*token_ptr;
	int		ret, i;
        bool            ch_found;

	token_ptr = (token_header *)scat->elements[0].buf;

        ch_found = FALSE;
        for (i = 0 ; i < Num_token_channels; i++) {
            if ( fd == Token_channel[i]) {
                ch_found = TRUE; 
                break;
            }
        }
        if (ch_found == FALSE) {
            Alarm(EXIT, "Net_recv: Listening and received packet on un-used interface %d\n", fd);
        }

	ret = DL_recv( fd, scat );

	if( ret <= 0 ) return( ret );

	/* Fliping token header to my form if needed */
	if( !Same_endian( token_ptr->type ) ) Flip_token( token_ptr );

	/* Monitor : droping token from other monitor components */
	if( !In_my_component( token_ptr->transmiter_id ) )
		return( 0 );

	return ( ret );
}

int	Net_ucast_token( int32 proc_id, sys_scatter *scat )
{
	token_header	*token_ptr;
	proc		p;
	int		ret;

	token_ptr = (token_header *)scat->elements[0].buf;
	token_ptr->type = Set_endian( token_ptr->type );
	token_ptr->transmiter_id = My.id;
	ret = Conf_proc_by_id( proc_id, &p );
	if( ret < 0 )
	{
		Alarm( PRINT, "Net_ucast_token: non existing proc_id %d\n",
			proc_id );
		return( ret );
	}
        if ( token_ptr->rtr_len > (MAX_PACKET_SIZE - sizeof(token_header) ) )
        {
            Memb_print_form_token( scat );
            Alarmp( SPLOG_FATAL, PRINT, "Net_ucast_token: Token too long for packet!\n");
        }

	ret = DL_send( Send_channel, proc_id, p.port+1, scat );
	return( ret );
}

void     Net_num_channels(int *num_bcast, int *num_token)
{
    *num_bcast = Num_bcast_channels;
    *num_token = Num_token_channels;
}

channel *Net_bcast_channel()
{
	return( &(Bcast_channel[0]) );
}

channel *Net_token_channel()
{
	return( &(Token_channel[0]) );
}

static	void	Clear_partition(int dummy, void *dummy_p)
{
	int	i;

	for( i=0; i < Conf_num_procs( &Cn ); i++ )
		Partition[i] = 0;
}

static	int	In_my_component( int32	proc_id )
{
	int	proc_index;
	proc	dummy_proc;
	char	ip[16];

	proc_index = Conf_proc_by_id( proc_id, &dummy_proc );
	if( proc_index < 0 )
	{
		Conf_id_to_str( proc_id, ip );
		Alarm( PRINT, "In_my_component: unknown proc %s\n", ip );
		return( 0 );
	}

	return( Partition[My_index] == Partition[proc_index] );
}

void	Flip_pack( packet_header *pack_ptr )
{
	pack_ptr->type		  = Flip_int32( pack_ptr->type );
	pack_ptr->transmiter_id	  = Flip_int32( pack_ptr->transmiter_id );
	pack_ptr->proc_id	  = Flip_int32( pack_ptr->proc_id );
	pack_ptr->memb_id.proc_id = Flip_int32( pack_ptr->memb_id.proc_id );
	pack_ptr->memb_id.time	  = Flip_int32( pack_ptr->memb_id.time );
	pack_ptr->seq		  = Flip_int32( pack_ptr->seq );
	pack_ptr->fifo_seq	  = Flip_int32( pack_ptr->fifo_seq );
	pack_ptr->packet_index	  = Flip_int16( pack_ptr->packet_index );
	pack_ptr->data_len	  = Flip_int16( pack_ptr->data_len );
}

void	Flip_token( token_header *token_ptr )
{
	token_ptr->type		 = Flip_int32( token_ptr->type );
	token_ptr->transmiter_id = Flip_int32( token_ptr->transmiter_id );
	token_ptr->seq		 = Flip_int32( token_ptr->seq );
	token_ptr->proc_id	 = Flip_int32( token_ptr->proc_id );
	token_ptr->aru		 = Flip_int32( token_ptr->aru );
	token_ptr->aru_last_id	 = Flip_int32( token_ptr->aru_last_id );
	token_ptr->flow_control	 = Flip_int16( token_ptr->flow_control );
	token_ptr->rtr_len	 = Flip_int16( token_ptr->rtr_len );
}