/* close down the connection to a node and mark it as down */
void node_disconnect(merlin_node *node, const char *fmt, ...)
{
va_list ap;
char *reason = NULL;
if (node->state == STATE_CONNECTED)
node_log_event_count(node, 1);
if (fmt) {
va_start(ap, fmt);
vasprintf(&reason, fmt, ap);
va_end(ap);
}
node_set_state(node, STATE_NONE, reason);
if (reason)
free(reason);
node->last_recv = 0;
/* avoid spurious close() errors while strace/valgrind debugging */
if (node->sock >= 0)
close(node->sock);
node->sock = -1;
iocache_reset(node->ioc);
}
unsigned long iocache_available(iocache *ioc)
{
if (!ioc || !ioc->ioc_buf || !ioc->ioc_bufsize || !ioc->ioc_buflen)
return 0;
if (ioc->ioc_buflen <= ioc->ioc_offset) {
iocache_reset(ioc);
return 0;
}
return ioc->ioc_buflen - ioc->ioc_offset;
}
/**
* Attempts to move data from the end to the beginning
* of the ioc_buf, expelling old data to make more room
* for new reads.
*/
static inline void iocache_move_data(iocache *ioc)
{
unsigned long available;
if (!ioc->ioc_offset)
return; /* nothing to do */
/* if we're fully read, we only have to reset the counters */
if (ioc->ioc_buflen <= ioc->ioc_offset) {
iocache_reset(ioc);
return;
}
available = ioc->ioc_buflen - ioc->ioc_offset;
memmove(ioc->ioc_buf, ioc->ioc_buf + ioc->ioc_offset, available);
ioc->ioc_offset = 0;
ioc->ioc_buflen = available;
}
