3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
8 * This Host ATM Research Platform ("HARP") file (the "Software") is
9 * made available by Network Computing Services, Inc. ("NetworkCS")
10 * "AS IS". NetworkCS does not provide maintenance, improvements or
11 * support of any kind.
13 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
14 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
15 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
16 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
17 * In no event shall NetworkCS be responsible for any damages, including
18 * but not limited to consequential damages, arising from or relating to
19 * any use of the Software or related support.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/sys/netatm/uni/q2110_subr.c,v 1.4 2000/01/17 20:49:49 mks Exp $
27 * @(#) $DragonFly: src/sys/netproto/atm/uni/q2110_subr.c,v 1.4 2003/08/07 21:54:34 dillon Exp $
31 * ATM Forum UNI Support
32 * ---------------------
34 * ITU-T Q.2110 - Subroutines
38 #include <netproto/atm/kern_include.h>
41 #include "sscop_misc.h"
42 #include "sscop_var.h"
45 * Conditionally Clear Transmission Queues
48 * sop pointer to sscop connection block
59 * Only clear queues if 'Clear Buffers' == No
61 if (sop->so_flags & SOF_NOCLRBUF)
62 sscop_xmit_drain(sop);
67 * Initialize Data Transfer State Variables
70 * sop pointer to sscop connection block
81 * Initialize for entry into Data Transfer Ready state
94 * Prepare Queues for Data Retrieval
97 * sop pointer to sscop connection block
104 q2110_prep_retrieve(sop)
108 * If 'Clear Buffers' == No, just clear retransmit queue,
109 * else clear all transmission queues
111 if (sop->so_flags & SOF_NOCLRBUF) {
112 sop->so_rexmit_hd = NULL;
113 sop->so_rexmit_tl = NULL;
115 sscop_xmit_drain(sop);
118 * Clear receiver queue
120 sscop_rcvr_drain(sop);
125 * Prepare Queues for Error Recovery
128 * sop pointer to sscop connection block
135 q2110_prep_recovery(sop)
139 * If 'Clear Buffers' == No, just clear retransmit queue,
140 * else clear all transmission queues
142 if (sop->so_flags & SOF_NOCLRBUF) {
143 sop->so_rexmit_hd = NULL;
144 sop->so_rexmit_tl = NULL;
146 sscop_xmit_drain(sop);
151 * Conditionally Deliver Received Data to User
154 * sop pointer to sscop connection block
161 q2110_deliver_data(sop)
165 * If 'Clear Buffers' == No, give data to user
167 if (sop->so_flags & SOF_NOCLRBUF) {
169 * We don't support 'Clear Buffers' == No, so don't bother
174 * Clear receiver queue
176 sscop_rcvr_drain(sop);
181 * Enter Connection Recovery Mode
184 * sop pointer to sscop connection block
191 q2110_error_recovery(sop)
196 * Stop data transfer timers
198 sop->so_timer[SSCOP_T_POLL] = 0;
199 sop->so_timer[SSCOP_T_NORESP] = 0;
200 sop->so_timer[SSCOP_T_IDLE] = 0;
201 sop->so_flags &= ~SOF_KEEPALIVE;
204 * Initialize receiver window
206 SEQ_SET(sop->so_rcvmax, sop->so_parm.sp_rcvwin);
212 SEQ_INCR(sop->so_sendconn, 1);
213 (void) sscop_send_er(sop);
216 * Set retransmit timer
218 sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
221 * Clear out appropriate queues
223 q2110_prep_recovery(sop);
228 sop->so_state = SOS_OUTRECOV;