Import of uIP 1.0

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@308 42af7a65-404d-4744-a932-0658087f49c3

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diff --git a/nuttx/include/net/uip/uipopt.h b/nuttx/include/net/uip/uipopt.h
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+/****************************************************************************
+ * uipopt.h
+ * Configuration options for uIP.
+ * author Adam Dunkels <adam@dunkels.com>
+ *
+ * This file is used for tweaking various configuration options for
+ * uIP. You should make a copy of this file into one of your project's
+ * directories instead of editing this example "uipopt.h" file that
+ * comes with the uIP distribution.
+ *
+ * uIP is configured using the per-project configuration file
+ * uipopt.h. This file contains all compile-time options for uIP and
+ * should be tweaked to match each specific project. The uIP
+ * distribution contains a documented example "uipopt.h" that can be
+ * copied and modified for each project.
+ *
+ * Note: Most of the configuration options in the uipopt.h should not
+ * be changed, but rather the per-project defconfig file.
+ *
+ * Copyright (c) 2001-2003, Adam Dunkels.
+ * 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.
+ *
+ * $Id: uipopt.h,v 1.1.1.1 2007-08-26 23:12:17 patacongo Exp $
+ *
+ */
+
+#ifndef __UIPOPT_H__
+#define __UIPOPT_H__
+
+#include <sys/types.h>
+#include <nuttx/config.h>
+
+/*------------------------------------------------------------------------------*/
+
+/**
+ * \name Static configuration options
+ *
+ * These configuration options can be used for setting the IP address
+ * settings statically, but only if UIP_FIXEDADDR is set to 1. The
+ * configuration options for a specific node includes IP address,
+ * netmask and default router as well as the Ethernet address. The
+ * netmask, default router and Ethernet address are appliciable only
+ * if uIP should be run over Ethernet.
+ *
+ * All of these should be changed to suit your project.
+*/
+
+/**
+ * Statistics datatype
+ *
+ * This typedef defines the dataype used for keeping statistics in
+ * uIP.
+ */
+typedef uint16 uip_stats_t;
+
+/**
+ * Determines if uIP should use a fixed IP address or not.
+ *
+ * If uIP should use a fixed IP address, the settings are set in the
+ * uipopt.h file. If not, the macros uip_sethostaddr(),
+ * uip_setdraddr() and uip_setnetmask() should be used instead.
+ */
+#define UIP_FIXEDADDR    0
+
+/**
+ * Ping IP address asignment.
+ *
+ * uIP uses a "ping" packets 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.
+ *
+ * \note This works only if UIP_FIXEDADDR is 0.
+ */
+
+#ifdef CONFIG_UIP_PINGADDRCONF
+#define UIP_PINGADDRCONF CONFIG_UIP_PINGADDRCONF
+#else /* CONFIG_UIP_PINGADDRCONF */
+#define UIP_PINGADDRCONF 0
+#endif /* CONFIG_UIP_PINGADDRCONF */
+
+/**
+ * Specifies if the uIP ARP module should be compiled with a fixed
+ * Ethernet MAC address or not.
+ *
+ * If this configuration option is 0, the macro uip_setethaddr() can
+ * be used to specify the Ethernet address at run-time.
+ */
+#define UIP_FIXEDETHADDR 0
+
+/*------------------------------------------------------------------------------*/
+/**
+ * \name IP configuration options
+ */
+/**
+ * The IP TTL (time to live) of IP packets sent by uIP.
+ *
+ * This should normally not be changed.
+ */
+#define UIP_TTL         64
+
+/**
+ * Turn on support for IP packet reassembly.
+ *
+ * uIP supports reassembly of fragmented IP packets. This features
+ * requires an additonal 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).
+ *
+ * \note IP packet reassembly is not heavily tested.
+ */
+#define UIP_REASSEMBLY 0
+
+/**
+ * The maximum time an IP fragment should wait in the reassembly
+ * buffer before it is dropped.
+ *
+ */
+#define UIP_REASS_MAXAGE 40
+
+/*------------------------------------------------------------------------------*/
+/**
+ * \name UDP configuration options
+ */
+
+/**
+ * Toggles wether UDP support should be compiled in or not.
+ */
+#ifdef CONFIG_UIP_UDP
+# define UIP_UDP CONFIG_UIP_UDP
+#else /* CONFIG_UIP_UDP */
+# define UIP_UDP           0
+#endif /* CONFIG_UIP_UDP */
+
+/**
+ * Toggles if UDP checksums should be used or not.
+ *
+ * \note Support for UDP checksums is currently not included in uIP,
+ * so this option has no function.
+ */
+#ifdef CONFIG_UIP_UDP_CHECKSUMS
+# define UIP_UDP_CHECKSUMS CONFIG_UIP_UDP_CHECKSUMS
+#else
+# define UIP_UDP_CHECKSUMS 0
+#endif
+
+/**
+ * The maximum amount of concurrent UDP connections.
+ */
+#ifdef CONFIG_UIP_UDP_CONNS
+# define UIP_UDP_CONNS CONFIG_UIP_UDP_CONNS
+#else /* CONFIG_UIP_UDP_CONNS */
+# define UIP_UDP_CONNS    10
+#endif /* CONFIG_UIP_UDP_CONNS */
+
+/**
+ * The name of the function that should be called when UDP datagrams arrive.
+ */
+
+
+/*------------------------------------------------------------------------------*/
+/**
+ * \name TCP configuration options
+ */
+
+/**
+ * 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 configration
+ * option can be turned off to reduce the code size of uIP.
+ */
+#define UIP_ACTIVE_OPEN 1
+
+/**
+ * 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 approximatly 30 bytes of memory.
+ */
+#ifndef CONFIG_UIP_MAX_CONNECTIONS
+# define UIP_CONNS       10
+#else /* CONFIG_UIP_MAX_CONNECTIONS */
+# define UIP_CONNS CONFIG_UIP_MAX_CONNECTIONS
+#endif /* CONFIG_UIP_MAX_CONNECTIONS */
+
+/**
+ * The maximum number of simultaneously listening TCP ports.
+ *
+ * Each listening TCP port requires 2 bytes of memory.
+ */
+#ifndef CONFIG_UIP_MAX_LISTENPORTS
+# define UIP_LISTENPORTS 20
+#else /* CONFIG_UIP_MAX_LISTENPORTS */
+# define UIP_LISTENPORTS CONFIG_UIP_MAX_LISTENPORTS
+#endif /* CONFIG_UIP_MAX_LISTENPORTS */
+
+/**
+ * Determines if support for TCP urgent data notification should be
+ * compiled in.
+ *
+ * Urgent data (out-of-band data) is a rarely used TCP feature that
+ * very seldom would be required.
+ */
+#define UIP_URGDATA      0
+
+/**
+ * The initial retransmission timeout counted in timer pulses.
+ *
+ * This should not be changed.
+ */
+#define UIP_RTO         3
+
+/**
+ * The maximum number of times a segment should be retransmitted
+ * before the connection should be aborted.
+ *
+ * This should not be changed.
+ */
+#define UIP_MAXRTX      8
+
+/**
+ * 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.
+ */
+#define UIP_MAXSYNRTX      5
+
+/**
+ * The TCP maximum segment size.
+ *
+ * This is should not be to set to more than
+ * UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN.
+ */
+#define UIP_TCP_MSS     (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN)
+
+/**
+ * The size of the advertised receiver's window.
+ *
+ * Should be set low (i.e., to the size of the uip_buf buffer) is the
+ * application is slow to process incoming data, or high (32768 bytes)
+ * if the application processes data quickly.
+ */
+#ifndef CONFIG_UIP_RECEIVE_WINDOW
+# define UIP_RECEIVE_WINDOW UIP_TCP_MSS
+#else
+# define UIP_RECEIVE_WINDOW CONFIG_UIP_RECEIVE_WINDOW
+#endif
+
+/**
+ * How long a connection should stay in the TIME_WAIT state.
+ *
+ * This configiration option has no real implication, and it should be
+ * left untouched.
+ */
+#define UIP_TIME_WAIT_TIMEOUT 120
+
+
+/*------------------------------------------------------------------------------*/
+/**
+ * \name ARP configuration options
+ */
+
+/**
+ * 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.
+ */
+#ifdef CONFIG_UIP_ARPTAB_SIZE
+# define UIP_ARPTAB_SIZE CONFIG_UIP_ARPTAB_SIZE
+#else
+# define UIP_ARPTAB_SIZE 8
+#endif
+
+/**
+ * The maxium age of ARP table entries measured in 10ths of seconds.
+ *
+ * An UIP_ARP_MAXAGE of 120 corresponds to 20 minutes (BSD
+ * default).
+ */
+#define UIP_ARP_MAXAGE 120
+
+/*------------------------------------------------------------------------------*/
+
+/**
+ * \name General configuration options
+ */
+
+/**
+ * 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 1500 bytes. Lower size results in lower
+ * TCP throughput, larger size results in higher TCP throughput.
+ */
+#ifndef CONFIG_UIP_BUFFER_SIZE
+# define UIP_BUFSIZE     400
+#else /* CONFIG_UIP_BUFFER_SIZE */
+# define UIP_BUFSIZE CONFIG_UIP_BUFFER_SIZE
+#endif /* CONFIG_UIP_BUFFER_SIZE */
+
+
+/**
+ * Determines if statistics support should be compiled in.
+ *
+ * The statistics is useful for debugging and to show the user.
+ */
+
+#ifndef CONFIG_UIP_STATISTICS
+# define UIP_STATISTICS  0
+#else /* CONFIG_UIP_STATISTICS */
+# define UIP_STATISTICS CONFIG_UIP_STATISTICS
+#endif /* CONFIG_UIP_STATISTICS */
+
+/**
+ * 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.
+ */
+
+#ifndef CONFIG_UIP_LOGGING
+# define UIP_LOGGING     0
+#else /* CONFIG_UIP_LOGGING */
+# define UIP_LOGGING     CONFIG_UIP_LOGGING
+#endif /* CONFIG_UIP_LOGGING */
+
+/**
+ * Broadcast support.
+ *
+ * This flag configures IP broadcast support. This is useful only
+ * together with UDP.
+ */
+
+#ifndef CONFIG_UIP_BROADCAST
+# define UIP_BROADCAST 0
+#else /* CONFIG_UIP_BROADCAST */
+# define UIP_BROADCAST CONFIG_UIP_BROADCAST
+#endif /* CONFIG_UIP_BROADCAST */
+
+/**
+ * Print out a uIP log message.
+ *
+ * This function must be implemented by the module that uses uIP, and
+ * is called by uIP whenever a log message is generated.
+ */
+void uip_log(char *msg);
+
+/**
+ * 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.
+ */
+
+#ifdef CONFIG_UIP_LLH_LEN
+# define UIP_LLH_LEN CONFIG_UIP_LLH_LEN
+#else /* CONFIG_UIP_LLH_LEN */
+# define UIP_LLH_LEN     14
+#endif /* CONFIG_UIP_LLH_LEN */
+
+/*------------------------------------------------------------------------------*/
+/**
+ * \name CPU architecture configuration
+ *
+ * The CPU architecture configuration is where the endianess of the
+ * CPU on which uIP is to be run is specified. Most CPUs today are
+ * little endian, and the most notable exception are the Motorolas
+ * which are big endian. The CONFIG_ENDIAN_BIG macro should be changed
+ * if uIP is to be run on a big endian architecture.
+ */
+
+/**
+ * The byte order of the CPU architecture on which uIP is to be run.
+ *
+ * This option can be either CONFIG_ENDIAN_BIG (Motorola byte order) or
+ * default little endian byte order (Intel byte order).
+ */
+
+#define UIP_BIG_ENDIAN     1234
+#define UIP_LITTLE_ENDIAN  3412
+
+#ifdef CONFIG_ENDIAN_BIG
+# define UIP_BYTE_ORDER     UIP_BIG_ENDIAN
+#else
+# define UIP_BYTE_ORDER     UIP_LITTLE_ENDIAN
+#endif
+
+#endif /* __UIPOPT_H__ */