## Copyright (c) 2001-2003, Adam Dunkels.
## Copyright 2013 Google Inc.
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
## 1. Redistributions of source code must retain the above copyright
##    notice, this list of conditions and the following disclaimer.
## 2. Redistributions in binary form must reproduce the above copyright
##    notice, this list of conditions and the following disclaimer in the
##    documentation and/or other materials provided with the distribution.
## 3. The name of the author may not be used to endorse or promote
##    products derived from this software without specific prior
##    written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
## OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
## WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
## DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
## GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
## INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
## WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
## NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## This file is part of the uIP TCP/IP stack.

menu "Static configuration options"

config UIP_IPADDR0
	int "Default IP octet 0"
	default 0

config UIP_IPADDR1
	int "Default IP octet 1"
	default 0

config UIP_IPADDR2
	int "Default IP octet 2"
	default 0

config UIP_IPADDR3
	int "Default IP octet 3"
	default 0

config UIP_DRIPADDR0
	int "Default default router IP octet 0"
	default 0

config UIP_DRIPADDR1
	int "Default default router IP octet 1"
	default 0

config UIP_DRIPADDR2
	int "Default default router IP octet 2"
	default 0

config UIP_DRIPADDR3
	int "Default default router IP octet 3"
	default 0

config UIP_NETMASK0
	int "Default netmask octet 0"
	default 0

config UIP_NETMASK1
	int "Default netmask octet 1"
	default 0

config UIP_NETMASK2
	int "Default netmask octet 2"
	default 0

config UIP_NETMASK3
	int "Default netmask octet 3"
	default 0

config UIP_PINGADDRCONF
	bool "Ping IP address assignment"
	default n
	help
	  uIP uses a "ping" packet for setting its own IP address if this
	  option is set. If so, uIP will start with an empty IP address and
	  the destination IP address of the first incoming "ping" (ICMP echo)
	  packet will be used for setting the hosts IP address.

	  This works only if fixed IP configuration is disabled.

config UIP_ETHADDR0
	hex "Default MAC address octet 0"
	default 0

config UIP_ETHADDR1
	hex "Default MAC address octet 1"
	default 0

config UIP_ETHADDR2
	hex "Default MAC address octet 2"
	default 0

config UIP_ETHADDR3
	hex "Default MAC address octet 3"
	default 0

config UIP_ETHADDR4
	hex "Default MAC address octet 4"
	default 0

config UIP_ETHADDR5
	hex "Default MAC address octet 5"
	default 0

endmenu

menu "IP configuration options"

config UIP_TTL
	int "IP TTL (time to live)"
	default 64
	help
	  The IP TTL (time to live) of IP packets sent by uIP.

	  This should normally not be changed.

config UIP_REASSEMBLY
	bool "Support for IP packet reassembly"
	default n
	help
	  Turn on support for IP packet reassembly.

	  uIP supports reassembly of fragmented IP packets. This features
	  requires an additional amount of RAM to hold the reassembly buffer
	  and the reassembly code size is approximately 700 bytes.  The
	  reassembly buffer is of the same size as the uip_buf buffer
	  (configured by UIP_BUFSIZE).

	  IP packet reassembly is not heavily tested.

config UIP_REASS_MAXAGE
	int "IP fragment reassembly max age (seconds)"
	depends on UIP_REASSEMBLY
	default 60
	help
	  The maximum time an IP fragment should wait in the reassembly
	  buffer before it is dropped.

endmenu

menu "UDP configuration options"

config UIP_UDP
	bool "UDP support"
	default y

config UIP_UDP_CHECKSUMS
	bool "UDP checksums"
	depends on UIP_UDP
	default y
	help
	  Toggles if UDP checksums should be used or not.

	  Support for UDP checksums is currently not included in uIP,
	  so this option has no function.

config UIP_UDP_CONNS
	int "Maximum number of concurrent UDP connections"
	depends on UIP_UDP
	default 10

endmenu

menu "TCP configuration options"

config UIP_TCP
	bool "TCP support"
	default y

config UIP_ACTIVE_OPEN
	bool "Support for opening connections"
	depends on UIP_TCP
	default y
	help
	  Determines if support for opening connections from uIP should be
	  compiled in.

	  If the applications that are running on top of uIP for this project
	  do not need to open outgoing TCP connections, this configuration
	  option can be turned off to reduce the code size of uIP.

config UIP_CONNS
	int "Maximum number of concurrent TCP connections"
	depends on UIP_TCP
	default 10
	help
	  The maximum number of simultaneously open TCP connections.

	  Since the TCP connections are statically allocated, turning this
	  configuration knob down results in less RAM used. Each TCP
	  connection requires approximately 30 bytes of memory.

config UIP_LISTENPORTS
	int "Maximum number of simultaneously listening TCP ports"
	depends on UIP_TCP
	default 20
	help
	  The maximum number of simultaneously listening TCP ports.

	  Each listening TCP port requires 2 bytes of memory.

config UIP_RTO
	int "Retransmission time out (timer pulses)"
	depends on UIP_TCP
	default 3
	help
	  The initial retransmission timeout counted in timer pulses.

	  This should not be changed.

config UIP_MAXRTX
	int "Max segment retransmissions"
	depends on UIP_TCP
	default 8
	help
	  The maximum number of times a segment should be retransmitted
	  before the connection should be aborted.

	  This should not be changed.

config UIP_MAXSYNRTX
	int "Max SYN retransmissions"
	depends on UIP_TCP
	default 5
	help
	  The maximum number of times a SYN segment should be retransmitted
	  before a connection request should be deemed to have been
	  unsuccessful.

	  This should not need to be changed.

config UIP_MAX_TCP_MSS
	bool "Use the largest TCP maximum segment size"
	depends on UIP_TCP
	default y
	help
	  The default is UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN

config UIP_TCP_MSS
	int "TCP maximum segment size"
	depends on !UIP_MAX_TCP_MSS
	help
	  The TCP maximum segment size.

	  This is should not be to set to more than
	  UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN.

config UIP_DEFAULT_RECEIVE_WINDOW
	bool "Use the default advertised receive window size"
	depends on UIP_TCP
	default y
	help
	  The default is UIP_TCP_MSS

config UIP_RECEIVE_WINDOW
	int "Advertised receive window size"
	depends on !UIP_DEFAULT_RECEIVE_WINDOW
	help
	  Should be set low (i.e., to the size of the uip_buf buffer) if the
	  application is slow to process incoming data, or high (32768 bytes)
	  if the application processes data quickly.

config UIP_TIME_WAIT_TIMEOUT
	int "Time to be in the TIME_WAIT state"
	depends on UIP_TCP
	default 120
	help
	  How long a connection should stay in the TIME_WAIT state.

	  This can be reduced for faster entry into power saving modes.

endmenu

menu "ARP configuration options"

config UIP_ARPTAB_SIZE
	int "Size of the ARP table"
	default 8
	help
	  The size of the ARP table.

	  This option should be set to a larger value if this uIP node will
	  have many connections from the local network.

config UIP_ARP_MAXAGE
	int "Maximum age of ARP table entries in 10s of seconds"
	default 120
	help
	  The maximum age of ARP table entries measured in 10s of seconds.

	  An UIP_ARP_MAXAGE of 120 corresponds to 20 minutes (BSD default).

endmenu

menu "General configuration options"

config UIP_DEFAULT_BUFSIZE
	bool "Use the default packet buffer size"
	default y
	help
	  The default is NET_LINK_MTU + UIP_LLH_LEN

config UIP_BUFSIZE
	int "Size of the packet buffer"
	depends on !UIP_DEFAULT_BUFSIZE
	help
	  The size of the uIP packet buffer.

	  The uIP packet buffer should not be smaller than 60 bytes, and does
	  not need to be larger than 1514 bytes. Lower size results in lower
	  TCP throughput, larger size results in higher TCP throughput.

config UIP_STATISTICS
	bool "Statistics support"
	default n
	help
	  Determines if statistics support should be compiled in.

	  The statistics is useful for debugging and to show the user.

config UIP_LOGGING
	bool "Log certain events"
	default n
	help
	  Determines if logging of certain events should be compiled in.

	  This is useful mostly for debugging. The function uip_log()
	  must be implemented to suit the architecture of the project, if
	  logging is turned on.

config UIP_BROADCAST
	bool "Broadcast support"
	default n
	help
	  Determines if uIP will pass received broadcast/multicast IPv4 UDP
	  packets to the application (all multicast addresses are treated as
	  broadcast in that case, there is no IGMP support). uIP can always
	  send outgoing broadcast packets regardless of this option.

config UIP_LLH_LEN
	int "Link level header length"
	default 14
	help
	  The link level header length.

	  This is the offset into the uip_buf where the IP header can be
	  found. For Ethernet, this should be set to 14. For SLIP, this
	  should be set to 0.

	  We probably won't use this constant for other link layers than
	  ethernet as they have variable header length (this is due to
	  variable number and type of address fields and to optional security
	  features)

	  E.g.: 802.15.4 -> 2 + (1/2*4/8) + 0/5/6/10/14
	        802.11 -> 4 + (6*3/4) + 2

endmenu