240 lines
4.1 KiB
C
240 lines
4.1 KiB
C
/*
|
|
*
|
|
* ===================================
|
|
* HARP | Host ATM Research Platform
|
|
* ===================================
|
|
*
|
|
*
|
|
* This Host ATM Research Platform ("HARP") file (the "Software") is
|
|
* made available by Network Computing Services, Inc. ("NetworkCS")
|
|
* "AS IS". NetworkCS does not provide maintenance, improvements or
|
|
* support of any kind.
|
|
*
|
|
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
|
|
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
|
|
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
|
|
* In no event shall NetworkCS be responsible for any damages, including
|
|
* but not limited to consequential damages, arising from or relating to
|
|
* any use of the Software or related support.
|
|
*
|
|
* Copyright 1994-1998 Network Computing Services, Inc.
|
|
*
|
|
* Copies of this Software may be made, however, the above copyright
|
|
* notice must be reproduced on all copies.
|
|
*
|
|
* @(#) $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* ATM Forum UNI Support
|
|
* ---------------------
|
|
*
|
|
* ITU-T Q.2110 - Subroutines
|
|
*
|
|
*/
|
|
|
|
#include <netatm/kern_include.h>
|
|
|
|
#include <netatm/uni/uni.h>
|
|
#include <netatm/uni/sscop.h>
|
|
#include <netatm/uni/sscop_misc.h>
|
|
#include <netatm/uni/sscop_pdu.h>
|
|
#include <netatm/uni/sscop_var.h>
|
|
|
|
#ifndef lint
|
|
__RCSID("@(#) $FreeBSD$");
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Conditionally Clear Transmission Queues
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_clear_xmit(sop)
|
|
struct sscop *sop;
|
|
{
|
|
/*
|
|
* Only clear queues if 'Clear Buffers' == No
|
|
*/
|
|
if (sop->so_flags & SOF_NOCLRBUF)
|
|
sscop_xmit_drain(sop);
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize Data Transfer State Variables
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_init_state(sop)
|
|
struct sscop *sop;
|
|
{
|
|
/*
|
|
* Initialize for entry into Data Transfer Ready state
|
|
*/
|
|
sop->so_send = 0;
|
|
sop->so_pollsend = 0;
|
|
sop->so_ack = 0;
|
|
sop->so_pollack = 1;
|
|
sop->so_polldata = 0;
|
|
sop->so_rcvhigh = 0;
|
|
sop->so_rcvnext = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Prepare Queues for Data Retrieval
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_prep_retrieve(sop)
|
|
struct sscop *sop;
|
|
{
|
|
/*
|
|
* If 'Clear Buffers' == No, just clear retransmit queue,
|
|
* else clear all transmission queues
|
|
*/
|
|
if (sop->so_flags & SOF_NOCLRBUF) {
|
|
sop->so_rexmit_hd = NULL;
|
|
sop->so_rexmit_tl = NULL;
|
|
} else
|
|
sscop_xmit_drain(sop);
|
|
|
|
/*
|
|
* Clear receiver queue
|
|
*/
|
|
sscop_rcvr_drain(sop);
|
|
}
|
|
|
|
|
|
/*
|
|
* Prepare Queues for Error Recovery
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_prep_recovery(sop)
|
|
struct sscop *sop;
|
|
{
|
|
/*
|
|
* If 'Clear Buffers' == No, just clear retransmit queue,
|
|
* else clear all transmission queues
|
|
*/
|
|
if (sop->so_flags & SOF_NOCLRBUF) {
|
|
sop->so_rexmit_hd = NULL;
|
|
sop->so_rexmit_tl = NULL;
|
|
} else
|
|
sscop_xmit_drain(sop);
|
|
}
|
|
|
|
|
|
/*
|
|
* Conditionally Deliver Received Data to User
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_deliver_data(sop)
|
|
struct sscop *sop;
|
|
{
|
|
/*
|
|
* If 'Clear Buffers' == No, give data to user
|
|
*/
|
|
if (sop->so_flags & SOF_NOCLRBUF) {
|
|
/*
|
|
* We don't support 'Clear Buffers' == No, so don't bother
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Clear receiver queue
|
|
*/
|
|
sscop_rcvr_drain(sop);
|
|
}
|
|
|
|
|
|
/*
|
|
* Enter Connection Recovery Mode
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
q2110_error_recovery(sop)
|
|
struct sscop *sop;
|
|
{
|
|
|
|
/*
|
|
* Stop data transfer timers
|
|
*/
|
|
sop->so_timer[SSCOP_T_POLL] = 0;
|
|
sop->so_timer[SSCOP_T_NORESP] = 0;
|
|
sop->so_timer[SSCOP_T_IDLE] = 0;
|
|
sop->so_flags &= ~SOF_KEEPALIVE;
|
|
|
|
/*
|
|
* Initialize receiver window
|
|
*/
|
|
SEQ_SET(sop->so_rcvmax, sop->so_parm.sp_rcvwin);
|
|
|
|
/*
|
|
* Send first ER PDU
|
|
*/
|
|
sop->so_connctl = 1;
|
|
SEQ_INCR(sop->so_sendconn, 1);
|
|
(void) sscop_send_er(sop);
|
|
|
|
/*
|
|
* Set retransmit timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
|
|
|
|
/*
|
|
* Clear out appropriate queues
|
|
*/
|
|
q2110_prep_recovery(sop);
|
|
|
|
/*
|
|
* Wait for ERAK
|
|
*/
|
|
sop->so_state = SOS_OUTRECOV;
|
|
|
|
return;
|
|
}
|
|
|