/* Return the user's connection index of the most recently ready call; that is, a call that has received at least one reply packet */
int
multi_Select(struct multi_handle *mh)
{
int index;
SPLVAR;
NETPRI;
#ifdef RX_ENABLE_LOCKS
MUTEX_ENTER(&mh->lock);
#endif /* RX_ENABLE_LOCKS */
while (mh->nextReady == mh->firstNotReady) {
if (mh->nReady == mh->nConns) {
#ifdef RX_ENABLE_LOCKS
MUTEX_EXIT(&mh->lock);
#endif /* RX_ENABLE_LOCKS */
USERPRI;
return -1;
}
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&mh->cv, &mh->lock);
#else /* RX_ENABLE_LOCKS */
osi_rxSleep(mh);
#endif /* RX_ENABLE_LOCKS */
}
index = *(mh->nextReady);
(mh->nextReady) += 1;
#ifdef RX_ENABLE_LOCKS
MUTEX_EXIT(&mh->lock);
#endif /* RX_ENABLE_LOCKS */
USERPRI;
return index;
}
int
rxi_WriteProc(struct rx_call *call, char *buf,
int nbytes)
{
struct rx_connection *conn = call->conn;
unsigned int t;
int requestCount = nbytes;
/* Free any packets from the last call to ReadvProc/WritevProc */
if (!opr_queue_IsEmpty(&call->app.iovq)) {
#ifdef RXDEBUG_PACKET
call->iovqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &call->app.iovq);
}
if (call->app.mode != RX_MODE_SENDING) {
if ((conn->type == RX_SERVER_CONNECTION)
&& (call->app.mode == RX_MODE_RECEIVING)) {
call->app.mode = RX_MODE_SENDING;
if (call->app.currentPacket) {
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(call->app.currentPacket);
call->app.currentPacket = NULL;
call->app.nLeft = 0;
call->app.nFree = 0;
}
} else {
return 0;
}
}
/* Loop condition is checked at end, so that a write of 0 bytes
* will force a packet to be created--specially for the case where
* there are 0 bytes on the stream, but we must send a packet
* anyway. */
do {
if (call->app.nFree == 0) {
MUTEX_ENTER(&call->lock);
if (call->error)
call->app.mode = RX_MODE_ERROR;
if (!call->error && call->app.currentPacket) {
clock_NewTime(); /* Bogus: need new time package */
/* The 0, below, specifies that it is not the last packet:
* there will be others. PrepareSendPacket may
* alter the packet length by up to
* conn->securityMaxTrailerSize */
call->app.bytesSent += call->app.currentPacket->length;
rxi_PrepareSendPacket(call, call->app.currentPacket, 0);
/* PrepareSendPacket drops the call lock */
rxi_WaitforTQBusy(call);
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags |= RX_PKTFLAG_TQ;
#endif
opr_queue_Append(&call->tq,
&call->app.currentPacket->entry);
#ifdef RXDEBUG_PACKET
call->tqc++;
#endif /* RXDEBUG_PACKET */
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
call->app.currentPacket = NULL;
/* If the call is in recovery, let it exhaust its current
* retransmit queue before forcing it to send new packets
*/
if (!(call->flags & (RX_CALL_FAST_RECOVER))) {
rxi_Start(call, 0);
}
} else if (call->app.currentPacket) {
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(call->app.currentPacket);
call->app.currentPacket = NULL;
}
/* Wait for transmit window to open up */
while (!call->error
&& call->tnext + 1 > call->tfirst + (2 * call->twind)) {
clock_NewTime();
call->startWait = clock_Sec();
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&call->cv_twind, &call->lock);
#else
call->flags |= RX_CALL_WAIT_WINDOW_ALLOC;
osi_rxSleep(&call->twind);
#endif
call->startWait = 0;
#ifdef RX_ENABLE_LOCKS
if (call->error) {
call->app.mode = RX_MODE_ERROR;
MUTEX_EXIT(&call->lock);
return 0;
}
#endif /* RX_ENABLE_LOCKS */
}
if ((call->app.currentPacket = rxi_AllocSendPacket(call, nbytes))) {
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags |= RX_PKTFLAG_CP;
#endif
call->app.nFree = call->app.currentPacket->length;
call->app.curvec = 1; /* 0th vec is always header */
/* begin at the beginning [ more or less ], continue
* on until the end, then stop. */
call->app.curpos =
(char *) call->app.currentPacket->wirevec[1].iov_base +
call->conn->securityHeaderSize;
call->app.curlen =
call->app.currentPacket->wirevec[1].iov_len -
call->conn->securityHeaderSize;
}
if (call->error) {
call->app.mode = RX_MODE_ERROR;
if (call->app.currentPacket) {
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(call->app.currentPacket);
call->app.currentPacket = NULL;
}
MUTEX_EXIT(&call->lock);
return 0;
}
MUTEX_EXIT(&call->lock);
}
if (call->app.currentPacket && (int)call->app.nFree < nbytes) {
/* Try to extend the current buffer */
int len, mud;
len = call->app.currentPacket->length;
mud = rx_MaxUserDataSize(call);
if (mud > len) {
int want;
want = MIN(nbytes - (int)call->app.nFree, mud - len);
rxi_AllocDataBuf(call->app.currentPacket, want,
RX_PACKET_CLASS_SEND_CBUF);
if (call->app.currentPacket->length > (unsigned)mud)
call->app.currentPacket->length = mud;
call->app.nFree += (call->app.currentPacket->length - len);
}
}
/* If the remaining bytes fit in the buffer, then store them
* and return. Don't ship a buffer that's full immediately to
* the peer--we don't know if it's the last buffer yet */
if (!call->app.currentPacket) {
call->app.nFree = 0;
}
while (nbytes && call->app.nFree) {
t = MIN((int)call->app.curlen, nbytes);
t = MIN((int)call->app.nFree, t);
memcpy(call->app.curpos, buf, t);
buf += t;
nbytes -= t;
call->app.curpos += t;
call->app.curlen -= (u_short)t;
call->app.nFree -= (u_short)t;
if (!call->app.curlen) {
/* need to get another struct iov */
if (++call->app.curvec >= call->app.currentPacket->niovecs) {
/* current packet is full, extend or send it */
call->app.nFree = 0;
} else {
call->app.curpos =
call->app.currentPacket->wirevec[call->app.curvec].iov_base;
call->app.curlen =
call->app.currentPacket->wirevec[call->app.curvec].iov_len;
}
}
} /* while bytes to send and room to send them */
/* might be out of space now */
if (!nbytes) {
return requestCount;
} else; /* more data to send, so get another packet and keep going */
} while (nbytes);
return requestCount - nbytes;
}
/* rxi_ReadvProc -- internal version.
*
* Fills in an iovec with pointers to the packet buffers. All packets
* except the last packet (new current packet) are moved to the iovq
* while the application is processing the data.
*
* LOCKS USED -- called at netpri.
*/
int
rxi_ReadvProc(struct rx_call *call, struct iovec *iov, int *nio, int maxio,
int nbytes)
{
int bytes;
/* Free any packets from the last call to ReadvProc/WritevProc */
if (!opr_queue_IsEmpty(&call->app.iovq)) {
#ifdef RXDEBUG_PACKET
call->iovqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &call->app.iovq);
}
if (call->app.mode == RX_MODE_SENDING) {
rxi_FlushWrite(call);
}
MUTEX_ENTER(&call->lock);
if (call->error)
goto error;
/* Get whatever data is currently available in the receive queue.
* If rxi_FillReadVec sends an ack packet then it is possible
* that we will receive more data while we drop the call lock
* to send the packet. Set the RX_CALL_IOVEC_WAIT flag
* here to avoid a race with the receive thread if we send
* hard acks in rxi_FillReadVec. */
call->flags |= RX_CALL_IOVEC_WAIT;
call->iovNBytes = nbytes;
call->iovMax = maxio;
call->iovNext = 0;
call->iov = iov;
rxi_FillReadVec(call, 0);
/* if we need more data then sleep until the receive thread has
* filled in the rest. */
if (!call->error && call->iovNBytes && call->iovNext < call->iovMax
&& !(call->flags & RX_CALL_RECEIVE_DONE)) {
call->flags |= RX_CALL_READER_WAIT;
clock_NewTime();
call->startWait = clock_Sec();
while (call->flags & RX_CALL_READER_WAIT) {
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&call->cv_rq, &call->lock);
#else
osi_rxSleep(&call->rq);
#endif
}
call->startWait = 0;
}
call->flags &= ~RX_CALL_IOVEC_WAIT;
if (call->error)
goto error;
call->iov = NULL;
*nio = call->iovNext;
bytes = nbytes - call->iovNBytes;
MUTEX_EXIT(&call->lock);
return bytes;
error:
MUTEX_EXIT(&call->lock);
call->app.mode = RX_MODE_ERROR;
return 0;
}
/* rxi_ReadProc -- internal version.
*
* LOCKS USED -- called at netpri
*/
int
rxi_ReadProc(struct rx_call *call, char *buf,
int nbytes)
{
int requestCount;
int code;
unsigned int t;
/* XXXX took out clock_NewTime from here. Was it needed? */
requestCount = nbytes;
/* Free any packets from the last call to ReadvProc/WritevProc */
if (!opr_queue_IsEmpty(&call->app.iovq)) {
#ifdef RXDEBUG_PACKET
call->iovqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &call->app.iovq);
}
do {
if (call->app.nLeft == 0) {
/* Get next packet */
MUTEX_ENTER(&call->lock);
for (;;) {
if (call->error || (call->app.mode != RX_MODE_RECEIVING)) {
if (call->error) {
call->app.mode = RX_MODE_ERROR;
MUTEX_EXIT(&call->lock);
return 0;
}
if (call->app.mode == RX_MODE_SENDING) {
MUTEX_EXIT(&call->lock);
rxi_FlushWrite(call);
MUTEX_ENTER(&call->lock);
continue;
}
}
code = rxi_GetNextPacket(call);
if (code)
return 0;
if (call->app.currentPacket) {
if (!(call->flags & RX_CALL_RECEIVE_DONE)) {
if (call->nHardAcks > (u_short) rxi_HardAckRate) {
rxi_CancelDelayedAckEvent(call);
rxi_SendAck(call, 0, 0, RX_ACK_DELAY, 0);
} else {
/* Delay to consolidate ack packets */
rxi_PostDelayedAckEvent(call, &rx_hardAckDelay);
}
}
break;
}
/*
* If we reach this point either we have no packets in the
* receive queue or the next packet in the queue is not the
* one we are looking for. There is nothing else for us to
* do but wait for another packet to arrive.
*/
/* Are there ever going to be any more packets? */
if (call->flags & RX_CALL_RECEIVE_DONE) {
MUTEX_EXIT(&call->lock);
return requestCount - nbytes;
}
/* Wait for in-sequence packet */
call->flags |= RX_CALL_READER_WAIT;
clock_NewTime();
call->startWait = clock_Sec();
while (call->flags & RX_CALL_READER_WAIT) {
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&call->cv_rq, &call->lock);
#else
osi_rxSleep(&call->rq);
#endif
}
call->startWait = 0;
#ifdef RX_ENABLE_LOCKS
if (call->error) {
MUTEX_EXIT(&call->lock);
return 0;
}
#endif /* RX_ENABLE_LOCKS */
}
MUTEX_EXIT(&call->lock);
} else
/* osi_Assert(cp); */
/* MTUXXX this should be replaced by some error-recovery code before shipping */
/* yes, the following block is allowed to be the ELSE clause (or not) */
/* It's possible for call->app.nLeft to be smaller than any particular
* iov_len. Usually, recvmsg doesn't change the iov_len, since it
* reflects the size of the buffer. We have to keep track of the
* number of bytes read in the length field of the packet struct. On
* the final portion of a received packet, it's almost certain that
* call->app.nLeft will be smaller than the final buffer. */
while (nbytes && call->app.currentPacket) {
t = MIN((int)call->app.curlen, nbytes);
t = MIN(t, (int)call->app.nLeft);
memcpy(buf, call->app.curpos, t);
buf += t;
nbytes -= t;
call->app.curpos += t;
call->app.curlen -= t;
call->app.nLeft -= t;
if (!call->app.nLeft) {
/* out of packet. Get another one. */
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(call->app.currentPacket);
call->app.currentPacket = NULL;
} else if (!call->app.curlen) {
/* need to get another struct iov */
if (++call->app.curvec >= call->app.currentPacket->niovecs) {
/* current packet is exhausted, get ready for another */
/* don't worry about curvec and stuff, they get set somewhere else */
#ifdef RX_TRACK_PACKETS
call->app.currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(call->app.currentPacket);
call->app.currentPacket = NULL;
call->app.nLeft = 0;
} else {
call->app.curpos =
call->app.currentPacket->wirevec[call->app.curvec].iov_base;
call->app.curlen =
call->app.currentPacket->wirevec[call->app.curvec].iov_len;
}
}
}
if (!nbytes) {
/* user buffer is full, return */
return requestCount;
}
} while (nbytes);
return requestCount;
}
/* rxi_ReadProc -- internal version.
*
* LOCKS USED -- called at netpri
*/
int
rxi_ReadProc(struct rx_call *call, char *buf,
int nbytes)
{
struct rx_packet *cp = call->currentPacket;
struct rx_packet *rp;
int requestCount;
unsigned int t;
/* XXXX took out clock_NewTime from here. Was it needed? */
requestCount = nbytes;
/* Free any packets from the last call to ReadvProc/WritevProc */
if (queue_IsNotEmpty(&call->iovq)) {
#ifdef RXDEBUG_PACKET
call->iovqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &call->iovq);
}
do {
if (call->nLeft == 0) {
/* Get next packet */
MUTEX_ENTER(&call->lock);
for (;;) {
if (call->error || (call->mode != RX_MODE_RECEIVING)) {
if (call->error) {
call->mode = RX_MODE_ERROR;
MUTEX_EXIT(&call->lock);
return 0;
}
if (call->mode == RX_MODE_SENDING) {
MUTEX_EXIT(&call->lock);
rxi_FlushWrite(call);
MUTEX_ENTER(&call->lock);
continue;
}
}
if (queue_IsNotEmpty(&call->rq)) {
/* Check that next packet available is next in sequence */
rp = queue_First(&call->rq, rx_packet);
if (rp->header.seq == call->rnext) {
afs_int32 error;
struct rx_connection *conn = call->conn;
queue_Remove(rp);
#ifdef RX_TRACK_PACKETS
rp->flags &= ~RX_PKTFLAG_RQ;
#endif
#ifdef RXDEBUG_PACKET
call->rqc--;
#endif /* RXDEBUG_PACKET */
/* RXS_CheckPacket called to undo RXS_PreparePacket's
* work. It may reduce the length of the packet by up
* to conn->maxTrailerSize, to reflect the length of the
* data + the header. */
if ((error =
RXS_CheckPacket(conn->securityObject, call,
rp))) {
/* Used to merely shut down the call, but now we
* shut down the whole connection since this may
* indicate an attempt to hijack it */
MUTEX_EXIT(&call->lock);
rxi_ConnectionError(conn, error);
MUTEX_ENTER(&conn->conn_data_lock);
rp = rxi_SendConnectionAbort(conn, rp, 0, 0);
MUTEX_EXIT(&conn->conn_data_lock);
rxi_FreePacket(rp);
return 0;
}
call->rnext++;
cp = call->currentPacket = rp;
#ifdef RX_TRACK_PACKETS
call->currentPacket->flags |= RX_PKTFLAG_CP;
#endif
call->curvec = 1; /* 0th vec is always header */
/* begin at the beginning [ more or less ], continue
* on until the end, then stop. */
call->curpos =
(char *)cp->wirevec[1].iov_base +
call->conn->securityHeaderSize;
call->curlen =
cp->wirevec[1].iov_len -
call->conn->securityHeaderSize;
/* Notice that this code works correctly if the data
* size is 0 (which it may be--no reply arguments from
* server, for example). This relies heavily on the
* fact that the code below immediately frees the packet
* (no yields, etc.). If it didn't, this would be a
* problem because a value of zero for call->nLeft
* normally means that there is no read packet */
call->nLeft = cp->length;
hadd32(call->bytesRcvd, cp->length);
/* Send a hard ack for every rxi_HardAckRate+1 packets
* consumed. Otherwise schedule an event to send
* the hard ack later on.
*/
call->nHardAcks++;
if (!(call->flags & RX_CALL_RECEIVE_DONE)) {
if (call->nHardAcks > (u_short) rxi_HardAckRate) {
rxevent_Cancel(call->delayedAckEvent, call,
RX_CALL_REFCOUNT_DELAY);
rxi_SendAck(call, 0, 0, RX_ACK_DELAY, 0);
} else {
struct clock when, now;
clock_GetTime(&now);
when = now;
/* Delay to consolidate ack packets */
clock_Add(&when, &rx_hardAckDelay);
if (!call->delayedAckEvent
|| clock_Gt(&call->delayedAckEvent->
eventTime, &when)) {
rxevent_Cancel(call->delayedAckEvent,
call,
RX_CALL_REFCOUNT_DELAY);
MUTEX_ENTER(&rx_refcnt_mutex);
CALL_HOLD(call, RX_CALL_REFCOUNT_DELAY);
MUTEX_EXIT(&rx_refcnt_mutex);
call->delayedAckEvent =
rxevent_PostNow(&when, &now,
rxi_SendDelayedAck, call,
0);
}
}
}
break;
}
}
/*
* If we reach this point either we have no packets in the
* receive queue or the next packet in the queue is not the
* one we are looking for. There is nothing else for us to
* do but wait for another packet to arrive.
*/
/* Are there ever going to be any more packets? */
if (call->flags & RX_CALL_RECEIVE_DONE) {
MUTEX_EXIT(&call->lock);
return requestCount - nbytes;
}
/* Wait for in-sequence packet */
call->flags |= RX_CALL_READER_WAIT;
clock_NewTime();
call->startWait = clock_Sec();
while (call->flags & RX_CALL_READER_WAIT) {
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&call->cv_rq, &call->lock);
#else
osi_rxSleep(&call->rq);
#endif
}
cp = call->currentPacket;
call->startWait = 0;
#ifdef RX_ENABLE_LOCKS
if (call->error) {
MUTEX_EXIT(&call->lock);
return 0;
}
#endif /* RX_ENABLE_LOCKS */
}
MUTEX_EXIT(&call->lock);
} else
/* osi_Assert(cp); */
/* MTUXXX this should be replaced by some error-recovery code before shipping */
/* yes, the following block is allowed to be the ELSE clause (or not) */
/* It's possible for call->nLeft to be smaller than any particular
* iov_len. Usually, recvmsg doesn't change the iov_len, since it
* reflects the size of the buffer. We have to keep track of the
* number of bytes read in the length field of the packet struct. On
* the final portion of a received packet, it's almost certain that
* call->nLeft will be smaller than the final buffer. */
while (nbytes && cp) {
t = MIN((int)call->curlen, nbytes);
t = MIN(t, (int)call->nLeft);
memcpy(buf, call->curpos, t);
buf += t;
nbytes -= t;
call->curpos += t;
call->curlen -= t;
call->nLeft -= t;
if (!call->nLeft) {
/* out of packet. Get another one. */
#ifdef RX_TRACK_PACKETS
call->currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(cp);
cp = call->currentPacket = (struct rx_packet *)0;
} else if (!call->curlen) {
/* need to get another struct iov */
if (++call->curvec >= cp->niovecs) {
/* current packet is exhausted, get ready for another */
/* don't worry about curvec and stuff, they get set somewhere else */
#ifdef RX_TRACK_PACKETS
call->currentPacket->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(cp);
cp = call->currentPacket = (struct rx_packet *)0;
call->nLeft = 0;
} else {
call->curpos =
(char *)cp->wirevec[call->curvec].iov_base;
call->curlen = cp->wirevec[call->curvec].iov_len;
}
}
}
if (!nbytes) {
/* user buffer is full, return */
return requestCount;
}
} while (nbytes);
return requestCount;
}
/* rxi_WritevProc -- internal version.
*
* Send buffers allocated in rxi_WritevAlloc.
*
* LOCKS USED -- called at netpri.
*/
int
rxi_WritevProc(struct rx_call *call, struct iovec *iov, int nio, int nbytes)
{
struct rx_packet *cp = NULL;
#ifdef RX_TRACK_PACKETS
struct rx_packet *p, *np;
#endif
int nextio;
int requestCount;
struct rx_queue tmpq;
#ifdef RXDEBUG_PACKET
u_short tmpqc;
#endif
requestCount = nbytes;
nextio = 0;
MUTEX_ENTER(&call->lock);
if (call->error) {
call->mode = RX_MODE_ERROR;
} else if (call->mode != RX_MODE_SENDING) {
call->error = RX_PROTOCOL_ERROR;
}
#ifdef AFS_GLOBAL_RXLOCK_KERNEL
rxi_WaitforTQBusy(call);
#endif /* AFS_GLOBAL_RXLOCK_KERNEL */
cp = call->currentPacket;
if (call->error) {
call->mode = RX_MODE_ERROR;
MUTEX_EXIT(&call->lock);
if (cp) {
#ifdef RX_TRACK_PACKETS
cp->flags &= ~RX_PKTFLAG_CP;
cp->flags |= RX_PKTFLAG_IOVQ;
#endif
queue_Prepend(&call->iovq, cp);
#ifdef RXDEBUG_PACKET
call->iovqc++;
#endif /* RXDEBUG_PACKET */
call->currentPacket = (struct rx_packet *)0;
}
#ifdef RXDEBUG_PACKET
call->iovqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &call->iovq);
return 0;
}
/* Loop through the I/O vector adjusting packet pointers.
* Place full packets back onto the iovq once they are ready
* to send. Set RX_PROTOCOL_ERROR if any problems are found in
* the iovec. We put the loop condition at the end to ensure that
* a zero length write will push a short packet. */
nextio = 0;
queue_Init(&tmpq);
#ifdef RXDEBUG_PACKET
tmpqc = 0;
#endif /* RXDEBUG_PACKET */
do {
if (call->nFree == 0 && cp) {
clock_NewTime(); /* Bogus: need new time package */
/* The 0, below, specifies that it is not the last packet:
* there will be others. PrepareSendPacket may
* alter the packet length by up to
* conn->securityMaxTrailerSize */
hadd32(call->bytesSent, cp->length);
rxi_PrepareSendPacket(call, cp, 0);
queue_Append(&tmpq, cp);
#ifdef RXDEBUG_PACKET
tmpqc++;
#endif /* RXDEBUG_PACKET */
cp = call->currentPacket = (struct rx_packet *)0;
/* The head of the iovq is now the current packet */
if (nbytes) {
if (queue_IsEmpty(&call->iovq)) {
MUTEX_EXIT(&call->lock);
call->error = RX_PROTOCOL_ERROR;
#ifdef RXDEBUG_PACKET
tmpqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &tmpq);
return 0;
}
cp = queue_First(&call->iovq, rx_packet);
queue_Remove(cp);
#ifdef RX_TRACK_PACKETS
cp->flags &= ~RX_PKTFLAG_IOVQ;
#endif
#ifdef RXDEBUG_PACKET
call->iovqc--;
#endif /* RXDEBUG_PACKET */
#ifdef RX_TRACK_PACKETS
cp->flags |= RX_PKTFLAG_CP;
#endif
call->currentPacket = cp;
call->nFree = cp->length;
call->curvec = 1;
call->curpos =
(char *)cp->wirevec[1].iov_base +
call->conn->securityHeaderSize;
call->curlen =
cp->wirevec[1].iov_len - call->conn->securityHeaderSize;
}
}
if (nbytes) {
/* The next iovec should point to the current position */
if (iov[nextio].iov_base != call->curpos
|| iov[nextio].iov_len > (int)call->curlen) {
call->error = RX_PROTOCOL_ERROR;
MUTEX_EXIT(&call->lock);
if (cp) {
#ifdef RX_TRACK_PACKETS
cp->flags &= ~RX_PKTFLAG_CP;
#endif
queue_Prepend(&tmpq, cp);
#ifdef RXDEBUG_PACKET
tmpqc++;
#endif /* RXDEBUG_PACKET */
cp = call->currentPacket = (struct rx_packet *)0;
}
#ifdef RXDEBUG_PACKET
tmpqc -=
#endif /* RXDEBUG_PACKET */
rxi_FreePackets(0, &tmpq);
return 0;
}
nbytes -= iov[nextio].iov_len;
call->curpos += iov[nextio].iov_len;
call->curlen -= iov[nextio].iov_len;
call->nFree -= iov[nextio].iov_len;
nextio++;
if (call->curlen == 0) {
if (++call->curvec > cp->niovecs) {
call->nFree = 0;
} else {
call->curpos = (char *)cp->wirevec[call->curvec].iov_base;
call->curlen = cp->wirevec[call->curvec].iov_len;
}
}
}
} while (nbytes && nextio < nio);
/* Move the packets from the temporary queue onto the transmit queue.
* We may end up with more than call->twind packets on the queue. */
#ifdef RX_TRACK_PACKETS
for (queue_Scan(&tmpq, p, np, rx_packet))
{
p->flags |= RX_PKTFLAG_TQ;
}
#endif
if (call->error)
call->mode = RX_MODE_ERROR;
queue_SpliceAppend(&call->tq, &tmpq);
if (!(call->flags & (RX_CALL_FAST_RECOVER | RX_CALL_FAST_RECOVER_WAIT))) {
rxi_Start(0, call, 0, 0);
}
/* Wait for the length of the transmit queue to fall below call->twind */
while (!call->error && call->tnext + 1 > call->tfirst + (2 * call->twind)) {
clock_NewTime();
call->startWait = clock_Sec();
#ifdef RX_ENABLE_LOCKS
CV_WAIT(&call->cv_twind, &call->lock);
#else
call->flags |= RX_CALL_WAIT_WINDOW_ALLOC;
osi_rxSleep(&call->twind);
#endif
call->startWait = 0;
}
/* cp is no longer valid since we may have given up the lock */
cp = call->currentPacket;
if (call->error) {
call->mode = RX_MODE_ERROR;
call->currentPacket = NULL;
MUTEX_EXIT(&call->lock);
if (cp) {
#ifdef RX_TRACK_PACKETS
cp->flags &= ~RX_PKTFLAG_CP;
#endif
rxi_FreePacket(cp);
}
return 0;
}
MUTEX_EXIT(&call->lock);
return requestCount - nbytes;
}