/* Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License. */


/*****************************************************************************
*
* See the following URL for configuration information.
* http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_IP_Configuration.html
*
*****************************************************************************/

#ifndef FREERTOS_IP_CONFIG_H
#define FREERTOS_IP_CONFIG_H

/* Prototype for the function used to print out.  In this case it prints to the
 * console before the network is connected then a UDP port after the network has
 * connected. */
extern void vLoggingPrintf( const char * pcFormatString,
                            ... );

/* Set to 1 to print out debug messages.  If ipconfigHAS_DEBUG_PRINTF is set to
 * 1 then FreeRTOS_debug_printf should be defined to the function used to print
 * out the debugging messages. */
#define ipconfigHAS_DEBUG_PRINTF    0
#if ( ipconfigHAS_DEBUG_PRINTF == 1 )
    #define FreeRTOS_debug_printf( X )    vLoggingPrintf X
#endif

/* Set to 1 to print out non debugging messages, for example the output of the
 * FreeRTOS_netstat() command, and ping replies.  If ipconfigHAS_PRINTF is set to 1
 * then FreeRTOS_printf should be set to the function used to print out the
 * messages. */
#define ipconfigHAS_PRINTF    0
#if ( ipconfigHAS_PRINTF == 1 )
    #define FreeRTOS_printf( X )    vLoggingPrintf X
#endif

/* Define the byte order of the target MCU (the MCU FreeRTOS+TCP is executing
 * on).  Valid options are pdFREERTOS_BIG_ENDIAN and pdFREERTOS_LITTLE_ENDIAN. */
#define ipconfigBYTE_ORDER                         pdFREERTOS_LITTLE_ENDIAN

/* If the network card/driver includes checksum offloading (IP/TCP/UDP checksums)
 * then set ipconfigDRIVER_INCLUDED_RX_IP_CHECKSUM to 1 to prevent the software
 * stack repeating the checksum calculations. */
#define ipconfigDRIVER_INCLUDED_RX_IP_CHECKSUM     1

/* Several API's will block until the result is known, or the action has been
 * performed, for example FreeRTOS_send() and FreeRTOS_recv().  The timeouts can be
 * set per socket, using setsockopt().  If not set, the times below will be
 * used as defaults. */
#define ipconfigSOCK_DEFAULT_RECEIVE_BLOCK_TIME    ( 5000 )
#define ipconfigSOCK_DEFAULT_SEND_BLOCK_TIME       ( 5000 )

/* Include support for LLMNR: Link-local Multicast Name Resolution
 * (non-Microsoft) */
#define ipconfigUSE_LLMNR                          ( 1 )

/* Include support for NBNS: NetBIOS Name Service (Microsoft) */
#define ipconfigUSE_NBNS                           ( 1 )

/* Include support for DNS caching.  For TCP, having a small DNS cache is very
 * useful.  When a cache is present, ipconfigDNS_REQUEST_ATTEMPTS can be kept low
 * and also DNS may use small timeouts.  If a DNS reply comes in after the DNS
 * socket has been destroyed, the result will be stored into the cache.  The next
 * call to FreeRTOS_gethostbyname() will return immediately, without even creating
 * a socket. */
#define ipconfigUSE_DNS_CACHE                      ( 1 )
#define ipconfigDNS_CACHE_NAME_LENGTH              ( 256 )
#define ipconfigDNS_CACHE_ENTRIES                  ( 4 )
#define ipconfigDNS_REQUEST_ATTEMPTS               ( 5 )

/* The IP stack executes it its own task (although any application task can make
 * use of its services through the published sockets API). ipconfigUDP_TASK_PRIORITY
 * sets the priority of the task that executes the IP stack.  The priority is a
 * standard FreeRTOS task priority so can take any value from 0 (the lowest
 * priority) to (configMAX_PRIORITIES - 1) (the highest priority).
 * configMAX_PRIORITIES is a standard FreeRTOS configuration parameter defined in
 * FreeRTOSConfig.h, not FreeRTOSIPConfig.h. Consideration needs to be given as to
 * the priority assigned to the task executing the IP stack relative to the
 * priority assigned to tasks that use the IP stack. */
#define ipconfigIP_TASK_PRIORITY                   ( configMAX_PRIORITIES - 2 )

/* The size, in words (not bytes), of the stack allocated to the FreeRTOS+TCP
 * task.  This setting is less important when the FreeRTOS Win32 simulator is used
 * as the Win32 simulator only stores a fixed amount of information on the task
 * stack.  FreeRTOS includes optional stack overflow detection, see:
 * http://www.freertos.org/Stacks-and-stack-overflow-checking.html */
#define ipconfigIP_TASK_STACK_SIZE_WORDS           ( configMINIMAL_STACK_SIZE * 5 )

/* ipconfigRAND32() is called by the IP stack to generate random numbers for
 * things such as a DHCP transaction number or initial sequence number.  Random
 * number generation is performed via this macro to allow applications to use their
 * own random number generation method.  For example, it might be possible to
 * generate a random number by sampling noise on an analogue input. */
extern UBaseType_t uxRand();
#define ipconfigRAND32()    uxRand()

/* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
 * network event hook at the appropriate times.  If ipconfigUSE_NETWORK_EVENT_HOOK
 * is not set to 1 then the network event hook will never be called.  See
 * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml
 */
#define ipconfigUSE_NETWORK_EVENT_HOOK                 1

/* Sockets have a send block time attribute.  If FreeRTOS_sendto() is called but
 * a network buffer cannot be obtained then the calling task is held in the Blocked
 * state (so other tasks can continue to executed) until either a network buffer
 * becomes available or the send block time expires.  If the send block time expires
 * then the send operation is aborted.  The maximum allowable send block time is
 * capped to the value set by ipconfigMAX_SEND_BLOCK_TIME_TICKS.  Capping the
 * maximum allowable send block time prevents prevents a deadlock occurring when
 * all the network buffers are in use and the tasks that process (and subsequently
 * free) the network buffers are themselves blocked waiting for a network buffer.
 * ipconfigMAX_SEND_BLOCK_TIME_TICKS is specified in RTOS ticks.  A time in
 * milliseconds can be converted to a time in ticks by dividing the time in
 * milliseconds by portTICK_PERIOD_MS. */
#define ipconfigUDP_MAX_SEND_BLOCK_TIME_TICKS          ( 5000U / portTICK_PERIOD_MS )

/* If ipconfigUSE_DHCP is 1 then FreeRTOS+TCP will attempt to retrieve an IP
 * address, netmask, DNS server address and gateway address from a DHCP server.  If
 * ipconfigUSE_DHCP is 0 then FreeRTOS+TCP will use a static IP address.  The
 * stack will revert to using the static IP address even when ipconfigUSE_DHCP is
 * set to 1 if a valid configuration cannot be obtained from a DHCP server for any
 * reason.  The static configuration used is that passed into the stack by the
 * FreeRTOS_IPInit() function call. */
#define ipconfigUSE_DHCP                               1

/* When ipconfigUSE_DHCP is set to 1, DHCP requests will be sent out at
 * increasing time intervals until either a reply is received from a DHCP server
 * and accepted, or the interval between transmissions reaches
 * ipconfigMAXIMUM_DISCOVER_TX_PERIOD.  The IP stack will revert to using the
 * static IP address passed as a parameter to FreeRTOS_IPInit() if the
 * re-transmission time interval reaches ipconfigMAXIMUM_DISCOVER_TX_PERIOD without
 * a DHCP reply being received. */
#define ipconfigMAXIMUM_DISCOVER_TX_PERIOD             ( 120000U / portTICK_PERIOD_MS )

/* The ARP cache is a table that maps IP addresses to MAC addresses.  The IP
 * stack can only send a UDP message to a remove IP address if it knowns the MAC
 * address associated with the IP address, or the MAC address of the router used to
 * contact the remote IP address.  When a UDP message is received from a remote IP
 * address the MAC address and IP address are added to the ARP cache.  When a UDP
 * message is sent to a remote IP address that does not already appear in the ARP
 * cache then the UDP message is replaced by a ARP message that solicits the
 * required MAC address information.  ipconfigARP_CACHE_ENTRIES defines the maximum
 * number of entries that can exist in the ARP table at any one time. */
#define ipconfigARP_CACHE_ENTRIES                      6

/* ARP requests that do not result in an ARP response will be re-transmitted a
 * maximum of ipconfigMAX_ARP_RETRANSMISSIONS times before the ARP request is
 * aborted. */
#define ipconfigMAX_ARP_RETRANSMISSIONS                ( 5 )

/* ipconfigMAX_ARP_AGE defines the maximum time between an entry in the ARP
 * table being created or refreshed and the entry being removed because it is stale.
 * New ARP requests are sent for ARP cache entries that are nearing their maximum
 * age.  ipconfigMAX_ARP_AGE is specified in tens of seconds, so a value of 150 is
 * equal to 1500 seconds (or 25 minutes). */
#define ipconfigMAX_ARP_AGE                            150

/* Implementing FreeRTOS_inet_addr() necessitates the use of string handling
 * routines, which are relatively large.  To save code space the full
 * FreeRTOS_inet_addr() implementation is made optional, and a smaller and faster
 * alternative called FreeRTOS_inet_addr_quick() is provided.  FreeRTOS_inet_addr()
 * takes an IP in decimal dot format (for example, "192.168.0.1") as its parameter.
 * FreeRTOS_inet_addr_quick() takes an IP address as four separate numerical octets
 * (for example, 192, 168, 0, 1) as its parameters.  If
 * ipconfigINCLUDE_FULL_INET_ADDR is set to 1 then both FreeRTOS_inet_addr() and
 * FreeRTOS_indet_addr_quick() are available.  If ipconfigINCLUDE_FULL_INET_ADDR is
 * not set to 1 then only FreeRTOS_indet_addr_quick() is available. */
#define ipconfigINCLUDE_FULL_INET_ADDR                 1

/* ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS defines the total number of network buffer that
 * are available to the IP stack.  The total number of network buffers is limited
 * to ensure the total amount of RAM that can be consumed by the IP stack is capped
 * to a pre-determinable value. */
#define ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS         60

/* A FreeRTOS queue is used to send events from application tasks to the IP
 * stack.  ipconfigEVENT_QUEUE_LENGTH sets the maximum number of events that can
 * be queued for processing at any one time.  The event queue must be a minimum of
 * 5 greater than the total number of network buffers. */
#define ipconfigEVENT_QUEUE_LENGTH                     ( ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS + 5 )

/* The address of a socket is the combination of its IP address and its port
 * number.  FreeRTOS_bind() is used to manually allocate a port number to a socket
 * (to 'bind' the socket to a port), but manual binding is not normally necessary
 * for client sockets (those sockets that initiate outgoing connections rather than
 * wait for incoming connections on a known port number).  If
 * ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND is set to 1 then calling
 * FreeRTOS_sendto() on a socket that has not yet been bound will result in the IP
 * stack automatically binding the socket to a port number from the range
 * socketAUTO_PORT_ALLOCATION_START_NUMBER to 0xffff.  If
 * ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND is set to 0 then calling FreeRTOS_sendto()
 * on a socket that has not yet been bound will result in the send operation being
 * aborted. */
#define ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND         1

/* Defines the Time To Live (TTL) values used in outgoing UDP packets. */
#define ipconfigUDP_TIME_TO_LIVE                       128
#define ipconfigTCP_TIME_TO_LIVE                       128 /* also defined in FreeRTOSIPConfigDefaults.h */

/* USE_TCP: Use TCP and all its features */
#define ipconfigUSE_TCP                                ( 1 )

/* USE_WIN: Let TCP use windowing mechanism. */
#define ipconfigUSE_TCP_WIN                            ( 1 )

/* The MTU is the maximum number of bytes the payload of a network frame can
 * contain.  For normal Ethernet V2 frames the maximum MTU is 1500.  Setting a
 * lower value can save RAM, depending on the buffer management scheme used.  If
 * ipconfigCAN_FRAGMENT_OUTGOING_PACKETS is 1 then (ipconfigNETWORK_MTU - 28) must
 * be divisible by 8. */
#define ipconfigNETWORK_MTU                            1200U

/* Set ipconfigUSE_DNS to 1 to include a basic DNS client/resolver.  DNS is used
 * through the FreeRTOS_gethostbyname() API function. */
#define ipconfigUSE_DNS                                1

/* If ipconfigREPLY_TO_INCOMING_PINGS is set to 1 then the IP stack will
 * generate replies to incoming ICMP echo (ping) requests. */
#define ipconfigREPLY_TO_INCOMING_PINGS                1

/* If ipconfigSUPPORT_OUTGOING_PINGS is set to 1 then the
 * FreeRTOS_SendPingRequest() API function is available. */
#define ipconfigSUPPORT_OUTGOING_PINGS                 0

/* If ipconfigSUPPORT_SELECT_FUNCTION is set to 1 then the FreeRTOS_select()
 * (and associated) API function is available. */
#define ipconfigSUPPORT_SELECT_FUNCTION                1

/* If ipconfigFILTER_OUT_NON_ETHERNET_II_FRAMES is set to 1 then Ethernet frames
 * that are not in Ethernet II format will be dropped.  This option is included for
 * potential future IP stack developments. */
#define ipconfigFILTER_OUT_NON_ETHERNET_II_FRAMES      1

/* If ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES is set to 1 then it is the
 * responsibility of the Ethernet interface to filter out packets that are of no
 * interest.  If the Ethernet interface does not implement this functionality, then
 * set ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES to 0 to have the IP stack
 * perform the filtering instead (it is much less efficient for the stack to do it
 * because the packet will already have been passed into the stack).  If the
 * Ethernet driver does all the necessary filtering in hardware then software
 * filtering can be removed by using a value other than 1 or 0. */
#define ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES    1

/* The Linux simulator cannot really simulate MAC interrupts, and needs to
 * block occasionally to allow other tasks to run. */
#define configWINDOWS_MAC_INTERRUPT_SIMULATOR_DELAY    ( 20 / portTICK_PERIOD_MS )

/* Advanced only: in order to access 32-bit fields in the IP packets with
 * 32-bit memory instructions, all packets will be stored 32-bit-aligned, plus 16-bits.
 * This has to do with the contents of the IP-packets: all 32-bit fields are
 * 32-bit-aligned, plus 16-bit(!) */
#define ipconfigPACKET_FILLER_SIZE                     2U

/* Define the size of the pool of TCP window descriptors.  On the average, each
 * TCP socket will use up to 2 x 6 descriptors, meaning that it can have 2 x 6
 * outstanding packets (for Rx and Tx).  When using up to 10 TP sockets
 * simultaneously, one could define TCP_WIN_SEG_COUNT as 120. */
#define ipconfigTCP_WIN_SEG_COUNT                      240

/* Each TCP socket has a circular buffers for Rx and Tx, which have a fixed
 * maximum size.  Define the size of Rx buffer for TCP sockets. */
#define ipconfigTCP_RX_BUFFER_LENGTH                   ( 1000 )

/* Define the size of Tx buffer for TCP sockets. */
#define ipconfigTCP_TX_BUFFER_LENGTH                   ( 1000 )

/* When using call-back handlers, the driver may check if the handler points to
 * real program memory (RAM or flash) or just has a random non-zero value. */
#define ipconfigIS_VALID_PROG_ADDRESS( x )    ( ( x ) != NULL )

/* Include support for TCP hang protection.  All sockets in a connecting or
 * disconnecting stage will timeout after a period of non-activity. */
#define ipconfigTCP_HANG_PROTECTION         ( 1 )
#define ipconfigTCP_HANG_PROTECTION_TIME    ( 30 )

/* Include support for TCP keep-alive messages. */
#define ipconfigTCP_KEEP_ALIVE              ( 1 )
#define ipconfigTCP_KEEP_ALIVE_INTERVAL     ( 20 ) /* in seconds */

#define portINLINE                          __inline

#endif /* FREERTOS_IP_CONFIG_H */
