/* Miscellaneous bits
   *
   * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public Licence
   * as published by the Free Software Foundation; either version
   * 2 of the Licence, or (at your option) any later version.
   */
  
  #include <linux/kernel.h>
  #include <net/sock.h>
  #include <net/af_rxrpc.h>
  #include "ar-internal.h"
  
  /*
   * The maximum listening backlog queue size that may be set on a socket by
   * listen().
   */
  unsigned int rxrpc_max_backlog __read_mostly = 10;
  
  /*
   * Maximum lifetime of a call (in mx).
   */
  unsigned int rxrpc_max_call_lifetime = 60 * 1000;
  
  /*
   * How long to wait before scheduling ACK generation after seeing a
   * packet with RXRPC_REQUEST_ACK set (in ms).
   */
  unsigned int rxrpc_requested_ack_delay = 1;
  
  /*
   * How long to wait before scheduling an ACK with subtype DELAY (in ms).
   *
   * We use this when we've received new data packets.  If those packets aren't
   * all consumed within this time we will send a DELAY ACK if an ACK was not
   * requested to let the sender know it doesn't need to resend.
   */
  unsigned int rxrpc_soft_ack_delay = 1 * 1000;
  
  /*
   * How long to wait before scheduling an ACK with subtype IDLE (in ms).
   *
   * We use this when we've consumed some previously soft-ACK'd packets when
   * further packets aren't immediately received to decide when to send an IDLE
   * ACK let the other end know that it can free up its Tx buffer space.
   */
  unsigned int rxrpc_idle_ack_delay = 0.5 * 1000;
  
  /*
   * Receive window size in packets.  This indicates the maximum number of
   * unconsumed received packets we're willing to retain in memory.  Once this
   * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
   * packets.
   */
  unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE;
  #if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE
  #error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE
  #endif
  
  /*
   * Maximum Rx MTU size.  This indicates to the sender the size of jumbo packet
   * made by gluing normal packets together that we're willing to handle.
   */
  unsigned int rxrpc_rx_mtu = 5692;
  
  /*
   * The maximum number of fragments in a received jumbo packet that we tell the
   * sender that we're willing to handle.
   */
  unsigned int rxrpc_rx_jumbo_max = 4;
  
  /*
   * Time till packet resend (in milliseconds).
   */
  unsigned int rxrpc_resend_timeout = 4 * 1000;
  
  const s8 rxrpc_ack_priority[] = {
  	[0]				= 0,
  	[RXRPC_ACK_DELAY]		= 1,
  	[RXRPC_ACK_REQUESTED]		= 2,
  	[RXRPC_ACK_IDLE]		= 3,
  	[RXRPC_ACK_DUPLICATE]		= 4,
  	[RXRPC_ACK_OUT_OF_SEQUENCE]	= 5,
  	[RXRPC_ACK_EXCEEDS_WINDOW]	= 6,
  	[RXRPC_ACK_NOSPACE]		= 7,
  	[RXRPC_ACK_PING_RESPONSE]	= 8,
  };