int
_tx_sndrel(int fd, int api_semantics)
{
struct T_ordrel_req orreq;
struct strbuf ctlbuf;
struct _ti_user *tiptr;
if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
return (-1);
sig_mutex_lock(&tiptr->ti_lock);
if (tiptr->ti_servtype != T_COTS_ORD) {
t_errno = TNOTSUPPORT;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
if (_T_IS_XTI(api_semantics)) {
/*
* User level state verification only done for XTI
* because doing for TLI may break existing applications
*/
if (!(tiptr->ti_state == T_DATAXFER ||
tiptr->ti_state == T_INREL)) {
t_errno = TOUTSTATE;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
if (_t_look_locked(fd, tiptr, 0,
api_semantics) == T_DISCONNECT) {
t_errno = TLOOK;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
}
orreq.PRIM_type = T_ORDREL_REQ;
ctlbuf.maxlen = (int)sizeof (struct T_ordrel_req);
ctlbuf.len = (int)sizeof (struct T_ordrel_req);
ctlbuf.buf = (caddr_t)&orreq;
/*
* Calls to send data (write or putmsg) can potentially
* block, for MT case, we drop the lock and enable signals here
* and acquire it back
*/
sig_mutex_unlock(&tiptr->ti_lock);
if (putmsg(fd, &ctlbuf, NULL, 0) < 0) {
if (errno == EAGAIN)
t_errno = TFLOW;
else
t_errno = TSYSERR;
return (-1);
}
sig_mutex_lock(&tiptr->ti_lock);
_T_TX_NEXTSTATE(T_SNDREL, tiptr,
"t_sndrel: invalid state on event T_SNDREL");
sig_mutex_unlock(&tiptr->ti_lock);
return (0);
}
int
_tx_rcvuderr(int fd, struct t_uderr *uderr, int api_semantics)
{
struct strbuf ctlbuf, databuf;
int flg;
int retval;
union T_primitives *pptr;
struct _ti_user *tiptr;
int sv_errno;
int didalloc;
int use_lookbufs = 0;
if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
return (-1);
sig_mutex_lock(&tiptr->ti_lock);
if (tiptr->ti_servtype != T_CLTS) {
t_errno = TNOTSUPPORT;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
/*
* is there a unitdata error indication in look buffer
*/
if (tiptr->ti_lookcnt > 0) {
ctlbuf.len = tiptr->ti_lookbufs.tl_lookclen;
ctlbuf.buf = tiptr->ti_lookbufs.tl_lookcbuf;
/* Note: cltbuf.maxlen not used in this case */
/* LINTED pointer cast */
assert(((union T_primitives *)ctlbuf.buf)->type
== T_UDERROR_IND);
databuf.maxlen = 0;
databuf.len = 0;
databuf.buf = NULL;
use_lookbufs = 1;
} else {
if ((retval = _t_look_locked(fd, tiptr, 0,
api_semantics)) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
if (retval != T_UDERR) {
t_errno = TNOUDERR;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
/*
* Acquire ctlbuf for use in sending/receiving control part
* of the message.
*/
if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
databuf.maxlen = 0;
databuf.len = 0;
databuf.buf = NULL;
flg = 0;
/*
* Since we already verified that a unitdata error
* indication is pending, we assume that this getmsg()
* will not block indefinitely.
*/
if ((retval = getmsg(fd, &ctlbuf, &databuf, &flg)) < 0) {
t_errno = TSYSERR;
goto err_out;
}
/*
* did I get entire message?
*/
if (retval > 0) {
t_errno = TSYSERR;
errno = EIO;
goto err_out;
}
}
/* LINTED pointer cast */
pptr = (union T_primitives *)ctlbuf.buf;
if ((ctlbuf.len < (int)sizeof (struct T_uderror_ind)) ||
(pptr->type != T_UDERROR_IND)) {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
if (uderr) {
if (_T_IS_TLI(api_semantics) || uderr->addr.maxlen > 0) {
if (TLEN_GT_NLEN(pptr->uderror_ind.DEST_length,
uderr->addr.maxlen)) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(uderr->addr.buf, ctlbuf.buf +
pptr->uderror_ind.DEST_offset,
(size_t)pptr->uderror_ind.DEST_length);
uderr->addr.len =
(unsigned int)pptr->uderror_ind.DEST_length;
}
if (_T_IS_TLI(api_semantics) || uderr->addr.maxlen > 0) {
if (TLEN_GT_NLEN(pptr->uderror_ind.OPT_length,
uderr->opt.maxlen)) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(uderr->opt.buf, ctlbuf.buf +
pptr->uderror_ind.OPT_offset,
(size_t)pptr->uderror_ind.OPT_length);
uderr->opt.len =
(unsigned int)pptr->uderror_ind.OPT_length;
}
uderr->error = pptr->uderror_ind.ERROR_type;
}
_T_TX_NEXTSTATE(T_RCVUDERR, tiptr,
"t_rcvuderr: invalid state event T_RCVUDERR");
if (use_lookbufs)
_t_free_looklist_head(tiptr);
else {
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
}
sig_mutex_unlock(&tiptr->ti_lock);
return (0);
err_out:
sv_errno = errno;
if (use_lookbufs)
_t_free_looklist_head(tiptr);
else {
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
}
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
int
_tx_rcvdis(int fd, struct t_discon *discon, int api_semantics)
{
struct strbuf ctlbuf;
struct strbuf databuf;
int retval;
union T_primitives *pptr;
struct _ti_user *tiptr;
int sv_errno;
int flg = 0;
int didalloc, didralloc;
int use_lookbufs = 0;
if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL)
return (-1);
/*
* Acquire per thread lock.
* Note: Lock is held across most of this routine
* including the blocking getmsg() call. This is fine
* because it is first verfied that an event is pending
*/
sig_mutex_lock(&tiptr->ti_lock);
if (tiptr->ti_servtype == T_CLTS) {
t_errno = TNOTSUPPORT;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
if (_T_IS_XTI(api_semantics)) {
/*
* User level state verification only done for XTI
* because doing for TLI may break existing applications
*/
if (!(tiptr->ti_state == T_DATAXFER ||
tiptr->ti_state == T_OUTCON ||
tiptr->ti_state == T_OUTREL ||
tiptr->ti_state == T_INREL ||
(tiptr->ti_state == T_INCON && tiptr->ti_ocnt > 0))) {
t_errno = TOUTSTATE;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
}
/*
* Handle likely scenario as special case:
* Is there a discon in look buffer as the first
* event in the lookbuffer, is so just get it.
*/
if ((tiptr->ti_lookcnt > 0) &&
/* LINTED pointer cast */
(*((t_scalar_t *)tiptr->ti_lookbufs.tl_lookcbuf) == T_DISCON_IND)) {
/*
* The T_DISCON_IND is already in the look buffer
*/
ctlbuf.len = tiptr->ti_lookbufs.tl_lookclen;
ctlbuf.buf = tiptr->ti_lookbufs.tl_lookcbuf;
/* Note: ctlbuf.maxlen not used in this case */
databuf.len = tiptr->ti_lookbufs.tl_lookdlen;
databuf.buf = tiptr->ti_lookbufs.tl_lookdbuf;
/* Note databuf.maxlen not used in this case */
use_lookbufs = 1;
} else {
if ((retval = _t_look_locked(fd, tiptr, 0,
api_semantics)) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
if (retval != T_DISCONNECT) {
t_errno = TNODIS;
sig_mutex_unlock(&tiptr->ti_lock);
return (-1);
}
/*
* get disconnect off read queue.
* use ctl and rcv buffers
*
* Acquire ctlbuf for use in sending/receiving control part
* of the message.
*/
if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) {
sv_errno = errno;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
/*
* Acquire databuf for use in sending/receiving data part
*/
if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0) {
sv_errno = errno;
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
/*
* Since we already verified that a disconnect event
* is present, we assume that this getmsg() cannot
* block indefinitely
*/
do {
retval = getmsg(fd, &ctlbuf, &databuf, &flg);
} while (retval < 0 && errno == EINTR);
if (retval < 0) {
t_errno = TSYSERR;
goto err_out;
}
if (databuf.len == -1) databuf.len = 0;
/*
* did I get entire message?
*/
if (retval > 0) {
t_errno = TSYSERR;
errno = EIO;
goto err_out;
}
}
/* LINTED pointer cast */
pptr = (union T_primitives *)ctlbuf.buf;
if ((ctlbuf.len < (int)sizeof (struct T_discon_ind)) ||
(pptr->type != T_DISCON_IND)) {
t_errno = TSYSERR;
errno = EPROTO;
goto err_out;
}
/*
* clear more and expedited flags
*/
tiptr->ti_flags &= ~(MORE | EXPEDITED);
if (tiptr->ti_ocnt <= 0) {
_T_TX_NEXTSTATE(T_RCVDIS1, tiptr,
"t_rcvdis: invalid state event T_RCVDIS1");
} else {
if (tiptr->ti_ocnt == 1) {
_T_TX_NEXTSTATE(T_RCVDIS2, tiptr,
"t_rcvdis: invalid state event T_RCVDIS2");
} else {
_T_TX_NEXTSTATE(T_RCVDIS3, tiptr,
"t_rcvdis: invalid state event T_RCVDIS3");
}
tiptr->ti_ocnt--;
tiptr->ti_flags &= ~TX_TQFULL_NOTIFIED;
}
if (discon != NULL) {
if (_T_IS_TLI(api_semantics) || discon->udata.maxlen > 0) {
if (databuf.len > (int)discon->udata.maxlen) {
t_errno = TBUFOVFLW;
goto err_out;
}
(void) memcpy(discon->udata.buf, databuf.buf,
(size_t)databuf.len);
discon->udata.len = databuf.len;
}
discon->reason = pptr->discon_ind.DISCON_reason;
discon->sequence = pptr->discon_ind.SEQ_number;
}
if (use_lookbufs)
_t_free_looklist_head(tiptr);
else {
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
}
sig_mutex_unlock(&tiptr->ti_lock);
return (0);
err_out:
sv_errno = errno;
if (use_lookbufs)
_t_free_looklist_head(tiptr);
else {
if (didalloc)
free(ctlbuf.buf);
else
tiptr->ti_ctlbuf = ctlbuf.buf;
if (didralloc)
free(databuf.buf);
else
tiptr->ti_rcvbuf = databuf.buf;
}
sig_mutex_unlock(&tiptr->ti_lock);
errno = sv_errno;
return (-1);
}
