526 lines
10 KiB
C
526 lines
10 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* ATM Forum UNI Support
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* ---------------------
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*
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* ITU-T Q.SAAL1 - Process AA-signals (SAP_SSCOP)
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*
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netatm/port.h>
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#include <netatm/queue.h>
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#include <netatm/atm.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_cm.h>
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#include <netatm/uni/sscop.h>
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#include <netatm/uni/sscop_misc.h>
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#include <netatm/uni/sscop_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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/*
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* Local functions
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*/
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static void sscop_estreq_ready(struct sscop *, int, int);
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static void sscop_datreq_outconn(struct sscop *, int, int);
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static void sscop_resreq_ready(struct sscop *, int, int);
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static void sscop_resrsp_inresyn(struct sscop *, int, int);
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static void sscop_resrsp_conresyn(struct sscop *, int, int);
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/*
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* Stack command state lookup tables
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*/
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/* SSCOP_INIT */
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static void (*sscop_init_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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sscop_init_inst, /* SOS_INST */
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NULL, /* SOS_IDLE */
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NULL, /* SOS_OUTCONN */
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NULL, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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NULL, /* SOS_OUTRESYN */
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NULL, /* SOS_INRESYN */
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NULL, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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NULL, /* SOS_READY */
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NULL /* SOS_TERM */
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};
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/* SSCOP_TERM */
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static void (*sscop_term_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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sscop_term_all, /* SOS_INST */
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sscop_term_all, /* SOS_IDLE */
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sscop_term_all, /* SOS_OUTCONN */
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sscop_term_all, /* SOS_INCONN */
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sscop_term_all, /* SOS_OUTDISC */
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sscop_term_all, /* SOS_OUTRESYN */
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sscop_term_all, /* SOS_INRESYN */
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sscop_term_all, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_term_all, /* SOS_READY */
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sscop_term_all /* SOS_TERM */
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};
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/* SSCOP_ESTABLISH_REQ */
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static void (*sscop_estreq_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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sscop_estreq_idle, /* SOS_IDLE */
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NULL, /* SOS_OUTCONN */
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NULL, /* SOS_INCONN */
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sscop_estreq_ready, /* SOS_OUTDISC */
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sscop_estreq_ready, /* SOS_OUTRESYN */
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sscop_estreq_ready, /* SOS_INRESYN */
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sscop_estreq_ready, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_estreq_ready, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/* SSCOP_ESTABLISH_RSP */
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static void (*sscop_estrsp_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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NULL, /* SOS_IDLE */
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NULL, /* SOS_OUTCONN */
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sscop_estrsp_inconn, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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NULL, /* SOS_OUTRESYN */
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NULL, /* SOS_INRESYN */
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NULL, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_aa_noop_1, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/* SSCOP_RELEASE_REQ */
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static void (*sscop_relreq_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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NULL, /* SOS_IDLE */
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sscop_relreq_outconn, /* SOS_OUTCONN */
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sscop_relreq_inconn, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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sscop_relreq_outconn, /* SOS_OUTRESYN */
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sscop_relreq_ready, /* SOS_INRESYN */
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sscop_relreq_outconn, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_relreq_ready, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/* SSCOP_DATA_REQ */
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static void (*sscop_datreq_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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NULL, /* SOS_IDLE */
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sscop_datreq_outconn, /* SOS_OUTCONN */
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NULL, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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NULL, /* SOS_OUTRESYN */
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sscop_datreq_ready, /* SOS_INRESYN */
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NULL, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_datreq_ready, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/* SSCOP_RESYNC_REQ */
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static void (*sscop_resreq_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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NULL, /* SOS_IDLE */
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NULL, /* SOS_OUTCONN */
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NULL, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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NULL, /* SOS_OUTRESYN */
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NULL, /* SOS_INRESYN */
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NULL, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_resreq_ready, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/* SSCOP_RESYNC_RSP */
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static void (*sscop_resrsp_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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NULL, /* SOS_IDLE */
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NULL, /* SOS_OUTCONN */
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NULL, /* SOS_INCONN */
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NULL, /* SOS_OUTDISC */
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NULL, /* SOS_OUTRESYN */
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sscop_resrsp_inresyn, /* SOS_INRESYN */
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sscop_resrsp_conresyn, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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NULL, /* SOS_READY */
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sscop_aa_noop_0 /* SOS_TERM */
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};
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/* SSCOP_UNITDATA_REQ */
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static void (*sscop_udtreq_tab[SOS_NUMSTATES])
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(struct sscop *, int, int) = {
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NULL, /* SOS_INST */
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sscop_udtreq_all, /* SOS_IDLE */
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sscop_udtreq_all, /* SOS_OUTCONN */
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sscop_udtreq_all, /* SOS_INCONN */
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sscop_udtreq_all, /* SOS_OUTDISC */
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sscop_udtreq_all, /* SOS_OUTRESYN */
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sscop_udtreq_all, /* SOS_INRESYN */
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sscop_udtreq_all, /* SOS_CONRESYN */
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NULL, /* invalid */
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NULL, /* invalid */
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sscop_udtreq_all, /* SOS_READY */
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sscop_aa_noop_1 /* SOS_TERM */
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};
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/*
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* Stack command lookup table
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*/
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void (*(*sscop_qsaal_aatab[SSCOP_CMD_SIZE]))
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(struct sscop *, int, int) = {
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NULL,
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sscop_init_tab,
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sscop_term_tab,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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sscop_estreq_tab,
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NULL,
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sscop_estrsp_tab,
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NULL,
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sscop_relreq_tab,
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NULL,
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NULL,
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sscop_datreq_tab,
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NULL,
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sscop_resreq_tab,
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NULL,
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sscop_resrsp_tab,
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NULL,
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NULL,
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NULL,
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sscop_udtreq_tab,
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NULL,
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NULL,
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NULL,
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NULL
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};
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/*
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* SSCOP_ESTABLISH_REQ / SOS_READY Command Processor
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 pointer to buffer containing SSCOP-UU data
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* arg2 buffer release parameter
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*
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* Returns:
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* none
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*
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*/
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static void
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sscop_estreq_ready(sop, arg1, arg2)
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struct sscop *sop;
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int arg1;
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int arg2;
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{
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/*
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* We don't support SSCOP-UU data
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*/
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if (arg1 != SSCOP_UU_NULL)
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KB_FREEALL((KBuffer *)arg1);
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/*
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* We currently only support BR=YES
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*/
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if (arg2 != SSCOP_BR_YES) {
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sscop_abort(sop, "sscop: BR != YES\n");
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return;
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}
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/*
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* Stop poll timer
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*/
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sop->so_timer[SSCOP_T_POLL] = 0;
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sop->so_flags &= ~SOF_KEEPALIVE;
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/*
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* Stop lost poll/stat timer
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*/
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sop->so_timer[SSCOP_T_NORESP] = 0;
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/*
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* Initialize receiver window
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*/
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SEQ_SET(sop->so_rcvmax, sop->so_parm.sp_rcvwin);
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/*
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* Send first BGN PDU
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*/
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sop->so_connctl = 1;
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(void) sscop_send_bgn(sop, SSCOP_SOURCE_USER);
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/*
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* Reset transmitter state
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*/
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qsaal1_reset_xmit(sop);
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/*
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* Set retransmit timer
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*/
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sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
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/*
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* Wait for BGAK
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*/
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sop->so_state = SOS_OUTCONN;
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return;
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}
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/*
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* SSCOP_DATA_REQ / SOS_OUTCONN Command Processor
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 pointer to buffer containing assured user data
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* arg2 unused
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*
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* Returns:
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* none
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*
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*/
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static void
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sscop_datreq_outconn(sop, arg1, arg2)
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struct sscop *sop;
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int arg1;
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int arg2;
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{
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KBuffer *m = (KBuffer *)arg1;
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/*
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* We must have a buffer (even if it contains no data)
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*/
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if (m == NULL) {
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sscop_abort(sop, "sscop_datreq_outconn: no buffer\n");
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return;
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}
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/*
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* Only accept data here if in the middle of an SSCOP-initiated
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* session reestablishment
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*/
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if ((sop->so_flags & SOF_REESTAB) == 0) {
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KB_FREEALL(m);
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sscop_abort(sop, "sscop_datreq_outconn: data not allowed\n");
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return;
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}
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/*
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* Place data at end of transmission queue
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*/
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KB_QNEXT(m) = NULL;
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if (sop->so_xmit_hd == NULL)
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sop->so_xmit_hd = m;
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else
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KB_QNEXT(sop->so_xmit_tl) = m;
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sop->so_xmit_tl = m;
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/*
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* Note that the transmit queues need to be serviced
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*/
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sop->so_flags |= SOF_XMITSRVC;
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return;
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}
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/*
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* SSCOP_RESYNC_REQ / SOS_READY Command Processor
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 pointer to buffer containing SSCOP-UU data
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* arg2 unused
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*
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* Returns:
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* none
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*
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*/
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static void
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sscop_resreq_ready(sop, arg1, arg2)
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struct sscop *sop;
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int arg1;
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int arg2;
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{
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/*
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* We don't support SSCOP-UU data
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*/
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if (arg1 != SSCOP_UU_NULL)
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KB_FREEALL((KBuffer *)arg1);
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/*
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* Stop poll timer
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*/
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sop->so_timer[SSCOP_T_POLL] = 0;
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sop->so_flags &= ~SOF_KEEPALIVE;
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/*
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* Stop lost poll/stat timer
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*/
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sop->so_timer[SSCOP_T_NORESP] = 0;
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/*
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* Send first RS PDU
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*/
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sop->so_connctl = 1;
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(void) sscop_send_rs(sop);
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/*
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* Reset transmitter state
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*/
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qsaal1_reset_xmit(sop);
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/*
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* Set retransmit timer
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*/
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sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
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/*
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* Wait for RSAK
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*/
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sop->so_state = SOS_OUTRESYN;
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return;
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}
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/*
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* SSCOP_RESYNC_RSP / SOS_INRESYN Command Processor
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 unused
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* arg2 unused
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*
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* Returns:
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* none
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*
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*/
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static void
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sscop_resrsp_inresyn(sop, arg1, arg2)
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struct sscop *sop;
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int arg1;
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int arg2;
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{
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/*
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* Send RSAK PDU
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*/
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(void) sscop_send_rsak(sop);
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/*
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* Back to data transfer state
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*/
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sop->so_state = SOS_READY;
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return;
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}
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/*
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* SSCOP_RESYNC_RSP / SOS_CONRESYN Command Processor
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 unused
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* arg2 unused
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*
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* Returns:
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* none
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*
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*/
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static void
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sscop_resrsp_conresyn(sop, arg1, arg2)
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struct sscop *sop;
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int arg1;
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int arg2;
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{
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/*
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* Send RSAK PDU
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*/
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(void) sscop_send_rsak(sop);
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/*
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* Back to waiting for peer's RSAK
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*/
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sop->so_state = SOS_OUTRESYN;
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return;
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}
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