FreeBSD-5.3/sys/netatm/uni/sscop_lower.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.
*/
/*
* ATM Forum UNI Support
* ---------------------
*
* SSCOP - SSCOP SAP interface processing
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netatm/uni/sscop_lower.c,v 1.14 2003/06/11 07:22:30 obrien Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <netatm/uni/sscop.h>
#include <netatm/uni/sscop_misc.h>
#include <netatm/uni/sscop_var.h>
/*
* Local variables
*/
/*
* Stack commands with arg1 containing a buffer pointer
*/
static u_char sscop_buf1[] = {
0,
0, /* SSCOP_INIT */
0, /* SSCOP_TERM */
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
1, /* SSCOP_ESTABLISH_REQ */
0,
1, /* SSCOP_ESTABLISH_RSP */
0,
1, /* SSCOP_RELEASE_REQ */
0,
0,
1, /* SSCOP_DATA_REQ */
0,
1, /* SSCOP_RESYNC_REQ */
0,
0, /* SSCOP_RESYNC_RSP */
0,
0,
0, /* SSCOP_RECOVER_RSP */
1, /* SSCOP_UNITDATA_REQ */
0,
0, /* SSCOP_RETRIEVE_REQ */
0,
0
};
/*
* SSCOP Lower Stack Command Handler
*
* This function will receive all of the stack commands issued from the
* layer above SSCOP (ie. using the SSCOP SAP). The appropriate processing
* function will be determined based on the received stack command and the
* current sscop control block state.
*
* Arguments:
* cmd stack command code
* tok session token
* arg1 command specific argument
* arg2 command specific argument
*
* Returns:
* none
*
*/
void
sscop_lower(cmd, tok, arg1, arg2)
int cmd;
void *tok;
intptr_t arg1;
intptr_t arg2;
{
struct sscop *sop = (struct sscop *)tok;
void (**stab)(struct sscop *, intptr_t, intptr_t);
void (*func)(struct sscop *, intptr_t, intptr_t);
int val;
ATM_DEBUG5("sscop_lower: cmd=0x%x, sop=%p, state=%d, arg1=%p, arg2=%p\n",
cmd, sop, sop->so_state, (void *)arg1, (void *)arg2);
/*
* Validate stack command
*/
val = cmd & STKCMD_VAL_MASK;
if (((u_int)cmd < (u_int)SSCOP_CMD_MIN) ||
((u_int)cmd > (u_int)SSCOP_CMD_MAX) ||
((stab = (sop->so_vers == SSCOP_VERS_QSAAL ?
sscop_qsaal_aatab[val] :
sscop_q2110_aatab[val])) == NULL)) {
log(LOG_ERR, "sscop_lower: unknown cmd 0x%x, sop=%p\n",
cmd, sop);
return;
}
/*
* Validate sscop state
*/
if (sop->so_state > SOS_MAXSTATE) {
log(LOG_ERR, "sscop_lower: invalid state sop=%p, state=%d\n",
sop, sop->so_state);
/*
* Release possible buffer
*/
if (sscop_buf1[val]) {
if (arg1)
KB_FREEALL((KBuffer *)arg1);
}
return;
}
/*
* Validate command/state combination
*/
func = stab[sop->so_state];
if (func == NULL) {
log(LOG_ERR,
"sscop_lower: invalid cmd/state: sop=%p, cmd=0x%x, state=%d\n",
sop, cmd, sop->so_state);
/*
* Release possible buffer
*/
if (sscop_buf1[val]) {
if (arg1)
KB_FREEALL((KBuffer *)arg1);
}
return;
}
/*
* Call event processing function
*/
(*func)(sop, arg1, arg2);
return;
}
/*
* No-op Processor (no buffers)
*
* Arguments:
* sop pointer to sscop connection block
* arg1 command-specific argument
* arg2 command-specific argument
*
* Returns:
* none
*
*/
void
sscop_aa_noop_0(sop, arg1, arg2)
struct sscop *sop;
intptr_t arg1;
intptr_t arg2;
{
/*
* Nothing to do
*/
return;
}
/*
* No-op Processor (arg1 == buffer)
*
* Arguments:
* sop pointer to sscop connection block
* arg1 command-specific argument (buffer pointer)
* arg2 command-specific argument
*
* Returns:
* none
*
*/
void
sscop_aa_noop_1(sop, arg1, arg2)
struct sscop *sop;
intptr_t arg1;
intptr_t arg2;
{
/*
* Just free buffer chain
*/
if (arg1)
KB_FREEALL((KBuffer *)arg1);
return;
}
/*
* SSCOP_INIT / SOS_INST Command Processor
*
* Arguments:
* sop pointer to sscop connection block
* arg1 command specific argument
* arg2 command specific argument
*
* Returns:
* none
*
*/
void
sscop_init_inst(sop, arg1, arg2)
struct sscop *sop;
intptr_t arg1;
intptr_t arg2;
{
int err;
/*
* Make ourselves ready and pass on the INIT
*/
sop->so_state = SOS_IDLE;
/*
* Validate SSCOP version to use
*/
switch ((enum sscop_vers)arg1) {
case SSCOP_VERS_QSAAL:
break;
case SSCOP_VERS_Q2110:
break;
default:
sscop_abort(sop, "sscop: bad version\n");
return;
}
sop->so_vers = (enum sscop_vers)arg1;
/*
* Copy SSCOP connection parameters to use
*/
sop->so_parm = *(struct sscop_parms *)arg2;
/*
* Initialize lower layers
*/
STACK_CALL(CPCS_INIT, sop->so_lower, sop->so_tokl, sop->so_connvc,
0, 0, err);
if (err) {
/*
* Should never happen
*/
sscop_abort(sop, "sscop: INIT failure\n");
return;
}
return;
}
/*
* SSCOP_TERM / SOS_* Command Processor
*
* Arguments:
* sop pointer to sscop connection block
* arg1 command specific argument
* arg2 command specific argument
*
* Returns:
* none
*
*/
void
sscop_term_all(sop, arg1, arg2)
struct sscop *sop;
intptr_t arg1;
intptr_t arg2;
{
int err;
/*
* Set termination state
*/
sop->so_state = SOS_TERM;
/*
* Pass the TERM down the stack
*/
STACK_CALL(CPCS_TERM, sop->so_lower, sop->so_tokl, sop->so_connvc,
0, 0, err);
if (err) {
/*
* Should never happen
*/
sscop_abort(sop, "sscop: TERM failure\n");
return;
}
/*
* Unlink and free the connection block
*/
UNLINK(sop, struct sscop, sscop_head, so_next);
uma_zfree(sscop_zone, sop);
sscop_vccnt--;
return;
}