Пример #1
0
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);
    }
}
Пример #3
0
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;
	}
    }
Пример #4
0
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;
	}
    }