static void
ErrorConnMax(XtransConnInfo trans_conn)
{
int fd = _XSERVTransGetConnectionNumber (trans_conn);
xConnSetupPrefix csp;
char pad[3];
struct iovec iov[3];
char byteOrder = 0;
int whichbyte = 1;
struct timeval waittime;
fd_set mask;
/* if these seems like a lot of trouble to go to, it probably is */
waittime.tv_sec = BOTIMEOUT / MILLI_PER_SECOND;
waittime.tv_usec = (BOTIMEOUT % MILLI_PER_SECOND) *
(1000000 / MILLI_PER_SECOND);
FD_ZERO(&mask);
FD_SET(fd, &mask);
(void)Select(fd + 1, &mask, NULL, NULL, &waittime);
/* try to read the byte-order of the connection */
(void)_XSERVTransRead(trans_conn, &byteOrder, 1);
if ((byteOrder == 'l') || (byteOrder == 'B'))
{
csp.success = xFalse;
csp.lengthReason = sizeof(NOROOM) - 1;
csp.length = (sizeof(NOROOM) + 2) >> 2;
csp.majorVersion = X_PROTOCOL;
csp.minorVersion = X_PROTOCOL_REVISION;
if (((*(char *) &whichbyte) && (byteOrder == 'B')) ||
(!(*(char *) &whichbyte) && (byteOrder == 'l')))
{
swaps(&csp.majorVersion, whichbyte);
swaps(&csp.minorVersion, whichbyte);
swaps(&csp.length, whichbyte);
}
iov[0].iov_len = sz_xConnSetupPrefix;
iov[0].iov_base = (char *) &csp;
iov[1].iov_len = csp.lengthReason;
iov[1].iov_base = NOROOM;
iov[2].iov_len = (4 - (csp.lengthReason & 3)) & 3;
iov[2].iov_base = pad;
(void)_XSERVTransWritev(trans_conn, iov, 3);
}
int
FlushClient(ClientPtr who, OsCommPtr oc, const void *__extraBuf, int extraCount)
{
ConnectionOutputPtr oco = oc->output;
int connection = oc->fd;
XtransConnInfo trans_conn = oc->trans_conn;
struct iovec iov[3];
static char padBuffer[3];
const char *extraBuf = __extraBuf;
long written;
long padsize;
long notWritten;
long todo;
if (!oco)
return 0;
written = 0;
padsize = padding_for_int32(extraCount);
notWritten = oco->count + extraCount + padsize;
if (!notWritten)
return 0;
todo = notWritten;
while (notWritten) {
long before = written; /* amount of whole thing written */
long remain = todo; /* amount to try this time, <= notWritten */
int i = 0;
long len;
/* You could be very general here and have "in" and "out" iovecs
* and write a loop without using a macro, but what the heck. This
* translates to:
*
* how much of this piece is new?
* if more new then we are trying this time, clamp
* if nothing new
* then bump down amount already written, for next piece
* else put new stuff in iovec, will need all of next piece
*
* Note that todo had better be at least 1 or else we'll end up
* writing 0 iovecs.
*/
#define InsertIOV(pointer, length) \
len = (length) - before; \
if (len > remain) \
len = remain; \
if (len <= 0) { \
before = (-len); \
} else { \
iov[i].iov_len = len; \
iov[i].iov_base = (pointer) + before; \
i++; \
remain -= len; \
before = 0; \
}
InsertIOV((char *) oco->buf, oco->count)
InsertIOV((char *) extraBuf, extraCount)
InsertIOV(padBuffer, padsize)
errno = 0;
if (trans_conn && (len = _XSERVTransWritev(trans_conn, iov, i)) >= 0) {
written += len;
notWritten -= len;
todo = notWritten;
}
else if (ETEST(errno)
#ifdef SUNSYSV /* check for another brain-damaged OS bug */
|| (errno == 0)
#endif
#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
|| ((errno == EMSGSIZE) && (todo == 1))
#endif
) {
/* If we've arrived here, then the client is stuffed to the gills
and not ready to accept more. Make a note of it and buffer
the rest. */
errno=0;
FD_SET(connection, &ClientsWriteBlocked);
AnyClientsWriteBlocked = TRUE;
if (written < oco->count) {
if (written > 0) {
oco->count -= written;
memmove((char *) oco->buf,
(char *) oco->buf + written, oco->count);
written = 0;
}
}
else {
written -= oco->count;
oco->count = 0;
}
if (notWritten > oco->size) {
unsigned char *obuf = NULL;
if (notWritten + BUFSIZE <= INT_MAX) {
obuf = realloc(oco->buf, notWritten + BUFSIZE);
}
if (!obuf) {
_XSERVTransDisconnect(oc->trans_conn);
_XSERVTransClose(oc->trans_conn);
oc->trans_conn = NULL;
MarkClientException(who);
oco->count = 0;
return -1;
}
oco->size = notWritten + BUFSIZE;
oco->buf = obuf;
}
/* If the amount written extended into the padBuffer, then the
difference "extraCount - written" may be less than 0 */
if ((len = extraCount - written) > 0)
memmove((char *) oco->buf + oco->count,
extraBuf + written, len);
oco->count = notWritten; /* this will include the pad */
/* return only the amount explicitly requested */
return extraCount;
}
#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
else if (errno == EMSGSIZE) {
todo >>= 1;
}
#endif
else {
if (oc->trans_conn) {