static void
clear_connection( connecttab* c, struct timeval* tvP )
{
ClientData client_data;
/* If we haven't actually sent the buffered response yet, do so now. */
httpd_write_response( c->hc );
if ( c->idle_read_timer != (Timer*) 0 )
{
tmr_cancel( c->idle_read_timer );
c->idle_read_timer = 0;
}
if ( c->idle_send_timer != (Timer*) 0 )
{
tmr_cancel( c->idle_send_timer );
c->idle_send_timer = 0;
}
if ( c->wakeup_timer != (Timer*) 0 )
{
tmr_cancel( c->wakeup_timer );
c->wakeup_timer = 0;
}
/* This is our version of Apache's lingering_close() routine, which is
** their version of the often-broken SO_LINGER socket option. For why
** this is necessary, see http://www.apache.org/docs/misc/fin_wait_2.html
** What we do is delay the actual closing for a few seconds, while reading
** any bytes that come over the connection. However, we don't want to do
** this unless it's necessary, because it ties up a connection slot and
** file descriptor which means our maximum connection-handling rate
** is lower. So, elsewhere we set a flag when we detect the few
** circumstances that make a lingering close necessary. If the flag
** isn't set we do the real close now.
*/
if ( c->hc->should_linger )
{
c->conn_state = CNST_LINGERING;
fdwatch_del_fd( c->hc->conn_fd );
fdwatch_add_fd( c->hc->conn_fd, c, FDW_READ );
/* Make sure we are still in no-delay mode. */
httpd_set_ndelay( c->hc->conn_fd );
client_data.p = c;
c->linger_timer = tmr_create(
tvP, linger_clear_connection, client_data, LINGER_TIME * 1000L, 0 );
if ( c->linger_timer == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(linger_clear_connection) failed" );
exit( 1 );
}
}
else
really_clear_connection( c, tvP );
}
static int handle_newconnect(struct timeval *tv, int listen_fd)
{
struct connect_s *conn;
ClientData client_data;
/* This loops until the accept() fails, trying to start new connections as
* fast as possible so we don't overrun the listen queue.
*/
nvdbg("New connection(s) on listen_fd %d\n", listen_fd);
for (;;)
{
/* Get the next free connection from the free list */
conn = free_connections;
/* Are there any free connections? */
if (!conn)
{
/* Out of connection slots. Run the timers, then the existing
* connections, and maybe we'll free up a slot by the time we get
* back here.
*/
ndbg("No free connections\n");
tmr_run(tv);
return -1;
}
/* Make the httpd_conn if necessary */
if (!conn->hc)
{
conn->hc = NEW(httpd_conn, 1);
if (conn->hc == NULL)
{
ndbg("out of memory allocating an httpd_conn\n");
exit(1);
}
conn->hc->initialized = 0;
}
/* Get the connection */
switch (httpd_get_conn(hs, listen_fd, conn->hc))
{
/* Some error happened. Run the timers, then the existing
* connections. Maybe the error will clear.
*/
case GC_FAIL:
tmr_run(tv);
return -1;
/* No more connections to accept for now */
case GC_NO_MORE:
return 0;
default:
break;
}
nvdbg("New connection fd %d\n", conn->hc->conn_fd);
/* Remove the connection entry from the free list */
conn->conn_state = CNST_READING;
free_connections = conn->next;
conn->next = NULL;
client_data.p = conn;
conn->active_at = tv->tv_sec;
conn->wakeup_timer = NULL;
conn->linger_timer = NULL;
conn->offset = 0;
/* Set the connection file descriptor to no-delay mode */
httpd_set_ndelay(conn->hc->conn_fd);
fdwatch_add_fd(fw, conn->hc->conn_fd, conn);
}
}
static int
handle_newconnect( struct timeval* tvP, int listen_fd )
{
connecttab* c;
ClientData client_data;
/* This loops until the accept() fails, trying to start new
** connections as fast as possible so we don't overrun the
** listen queue.
*/
for (;;)
{
/* Is there room in the connection table? */
if ( num_connects >= max_connects )
{
/* Out of connection slots. Run the timers, then the
** existing connections, and maybe we'll free up a slot
** by the time we get back here.
*/
tmr_run( tvP );
return 0;
}
/* Get the first free connection entry off the free list. */
if ( first_free_connect == -1 || connects[first_free_connect].conn_state != CNST_FREE )
{
return;
}
c = &connects[first_free_connect];
/* Make the httpd_conn if necessary. */
if ( c->hc == (httpd_conn*) 0 )
{
c->hc = NEW( httpd_conn, 1 );
if ( c->hc == (httpd_conn*) 0 )
{
return;
}
c->hc->initialized = 0;
c->hc->conn = c;
++httpd_conn_count;
}
/* Get the connection. */
switch ( httpd_get_conn( hs, listen_fd, c->hc ) )
{
/* Some error happened. Run the timers, then the
** existing connections. Maybe the error will clear.
*/
case GC_FAIL:
tmr_run( tvP );
return 0;
/* No more connections to accept for now. */
case GC_NO_MORE:
return 1;
}
c->conn_state = CNST_READING;
/* Pop it off the free list. */
first_free_connect = c->next_free_connect;
c->next_free_connect = -1;
++num_connects;
client_data.p = c;
c->active_at = tvP->tv_sec;
c->wakeup_timer = (Timer*) 0;
c->linger_timer = (Timer*) 0;
c->next_byte_index = 0;
/* Set the connection file descriptor to no-delay mode. */
httpd_set_ndelay( c->hc->conn_fd );
fdwatch_add_fd( c->hc->conn_fd, c, FDW_READ );
++stats_connections;
if ( num_connects > stats_simultaneous )
stats_simultaneous = num_connects;
}
}
static int
handle_newconnect( struct timeval* tvP, int listen_fd )
{
int cnum;
connecttab* c;
ClientData client_data;
/* This loops until the accept() fails, trying to start new
** connections as fast as possible so we don't overrun the
** listen queue.
*/
for (;;)
{
/* Is there room in the connection table? */
if ( numconnects >= maxconnects )
{
/* Out of connection slots. Run the timers, then the
** existing connections, and maybe we'll free up a slot
** by the time we get back here.
**/
syslog( LOG_WARNING, "too many connections!" );
tmr_run( tvP );
return 0;
}
/* Find a free connection entry. */
for ( cnum = 0; cnum < maxconnects; ++cnum )
if ( connects[cnum].conn_state == CNST_FREE )
break;
c = &connects[cnum];
/* Make the httpd_conn if necessary. */
if ( c->hc == (httpd_conn*) 0 )
{
c->hc = NEW( httpd_conn, 1 );
if ( c->hc == (httpd_conn*) 0 )
{
syslog( LOG_CRIT, "out of memory allocating an httpd_conn" );
exit( 1 );
}
c->hc->initialized = 0;
++httpd_conn_count;
}
/* Get the connection. */
switch ( httpd_get_conn( hs, listen_fd, c->hc ) )
{
case GC_FAIL:
case GC_NO_MORE:
return 1;
}
c->conn_state = CNST_READING;
++numconnects;
client_data.p = c;
c->idle_read_timer = tmr_create(
tvP, idle_read_connection, client_data, IDLE_READ_TIMELIMIT * 1000L,
0 );
if ( c->idle_read_timer == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(idle_read_connection) failed" );
exit( 1 );
}
c->idle_send_timer = (Timer*) 0;
c->wakeup_timer = (Timer*) 0;
c->linger_timer = (Timer*) 0;
c->bytes_sent = 0;
c->numtnums = 0;
/* Set the connection file descriptor to no-delay mode. */
httpd_set_ndelay( c->hc->conn_fd );
fdwatch_add_fd( c->hc->conn_fd, c, FDW_READ );
++stats_connections;
if ( numconnects > stats_simultaneous )
stats_simultaneous = numconnects;
}
}
