350 lines
6.2 KiB
C
350 lines
6.2 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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* @(#) $Id: sscop_lower.c,v 1.2 1998/09/17 09:35:01 phk Exp $
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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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* SSCOP - SSCOP SAP interface processing
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*
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*/
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#include <netatm/kern_include.h>
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#include <netatm/uni/uni.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_pdu.h>
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#include <netatm/uni/sscop_var.h>
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#ifndef lint
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__RCSID("@(#) $Id: sscop_lower.c,v 1.2 1998/09/17 09:35:01 phk Exp $");
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#endif
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/*
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* Local variables
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*/
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/*
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* Stack commands with arg1 containing an buffer pointer
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*/
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static u_char sscop_buf1[] = {
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0,
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0, /* SSCOP_INIT */
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0, /* SSCOP_TERM */
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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1, /* SSCOP_ESTABLISH_REQ */
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0,
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1, /* SSCOP_ESTABLISH_RSP */
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0,
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1, /* SSCOP_RELEASE_REQ */
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0,
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0,
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1, /* SSCOP_DATA_REQ */
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0,
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1, /* SSCOP_RESYNC_REQ */
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0,
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0, /* SSCOP_RESYNC_RSP */
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0,
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0,
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0, /* SSCOP_RECOVER_RSP */
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1, /* SSCOP_UNITDATA_REQ */
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0,
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0, /* SSCOP_RETRIEVE_REQ */
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0,
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0
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};
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/*
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* SSCOP Lower Stack Command Handler
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*
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* This function will receive all of the stack commands issued from the
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* layer above SSCOP (ie. using the SSCOP SAP). The appropriate processing
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* function will be determined based on the received stack command and the
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* current sscop control block state.
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*
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* Arguments:
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* cmd stack command code
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* tok session token
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* arg1 command specific argument
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* arg2 command specific argument
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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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void
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sscop_lower(cmd, tok, arg1, arg2)
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int cmd;
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void *tok;
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int arg1;
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int arg2;
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{
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struct sscop *sop = (struct sscop *)tok;
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void (**stab) __P((struct sscop *, int, int));
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void (*func) __P((struct sscop *, int, int));
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int val;
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ATM_DEBUG5("sscop_lower: cmd=0x%x, sop=%p, state=%d, arg1=0x%x, arg2=0x%x\n",
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cmd, sop, sop->so_state, arg1, arg2);
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/*
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* Validate stack command
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*/
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val = cmd & STKCMD_VAL_MASK;
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if (((u_int)cmd < (u_int)SSCOP_CMD_MIN) ||
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((u_int)cmd > (u_int)SSCOP_CMD_MAX) ||
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((stab = (sop->so_vers == SSCOP_VERS_QSAAL ?
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sscop_qsaal_aatab[val] :
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sscop_q2110_aatab[val])) == NULL)) {
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log(LOG_ERR, "sscop_lower: unknown cmd 0x%x, sop=%p\n",
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cmd, sop);
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return;
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}
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/*
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* Validate sscop state
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*/
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if (sop->so_state > SOS_MAXSTATE) {
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log(LOG_ERR, "sscop_lower: invalid state sop=%p, state=%d\n",
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sop, sop->so_state);
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/*
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* Release possible buffer
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*/
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if (sscop_buf1[val]) {
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if (arg1)
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KB_FREEALL((KBuffer *)arg1);
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}
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return;
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}
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/*
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* Validate command/state combination
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*/
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func = stab[sop->so_state];
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if (func == NULL) {
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log(LOG_ERR,
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"sscop_lower: invalid cmd/state: sop=%p, cmd=0x%x, state=%d\n",
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sop, cmd, sop->so_state);
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/*
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* Release possible buffer
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*/
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if (sscop_buf1[val]) {
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if (arg1)
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KB_FREEALL((KBuffer *)arg1);
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}
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return;
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}
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/*
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* Call event processing function
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*/
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(*func)(sop, arg1, arg2);
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return;
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}
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/*
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* No-op Processor (no buffers)
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 command-specific argument
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* arg2 command-specific argument
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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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void
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sscop_aa_noop_0(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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* Nothing to do
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*/
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return;
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}
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/*
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* No-op Processor (arg1 == buffer)
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*
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* Arguments:
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* sop pointer to sscop connection block
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* arg1 command-specific argument (buffer pointer)
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* arg2 command-specific argument
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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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void
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sscop_aa_noop_1(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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* Just free buffer chain
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*/
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if (arg1)
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KB_FREEALL((KBuffer *)arg1);
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return;
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}
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/*
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* SSCOP_INIT / SOS_INST 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 command specific argument
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* arg2 command specific argument
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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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void
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sscop_init_inst(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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int err;
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/*
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* Make ourselves ready and pass on the INIT
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*/
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sop->so_state = SOS_IDLE;
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/*
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* Validate SSCOP version to use
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*/
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switch ((enum sscop_vers)arg1) {
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case SSCOP_VERS_QSAAL:
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break;
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case SSCOP_VERS_Q2110:
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break;
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default:
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sscop_abort(sop, "sscop: bad version\n");
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return;
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}
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sop->so_vers = (enum sscop_vers)arg1;
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/*
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* Copy SSCOP connection parameters to use
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*/
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sop->so_parm = *(struct sscop_parms *)arg2;
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/*
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* Initialize lower layers
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*/
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STACK_CALL(CPCS_INIT, sop->so_lower, sop->so_tokl, sop->so_connvc,
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0, 0, err);
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if (err) {
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/*
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* Should never happen
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*/
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sscop_abort(sop, "sscop: INIT failure\n");
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return;
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}
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return;
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}
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/*
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* SSCOP_TERM / SOS_* 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 command specific argument
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* arg2 command specific argument
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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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void
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sscop_term_all(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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int err;
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/*
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* Set termination state
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*/
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sop->so_state = SOS_TERM;
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/*
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* Pass the TERM down the stack
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*/
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STACK_CALL(CPCS_TERM, sop->so_lower, sop->so_tokl, sop->so_connvc,
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0, 0, err);
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if (err) {
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/*
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* Should never happen
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*/
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sscop_abort(sop, "sscop: TERM failure\n");
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return;
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}
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/*
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* Unlink and free the connection block
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*/
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UNLINK(sop, struct sscop, sscop_head, so_next);
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atm_free((caddr_t)sop);
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sscop_vccnt--;
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return;
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}
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