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0a46ef6af4
instead of PBUF_ROM. This addition allows support of copy-on-demand where the lower layers can call pbuf_unref() which tests for any PBUF_REF buffers and replaces them with PBUF_POOL buffers. This is now used everywhere. pbuf_unref() is called in ARP queueing and in the coldfire driver, which puts frames on a DMA queue and frees them later. Along with this change pbuf_free() now goes through the entire chain of buffers and tests all the ref counters, not just the first one. Generally now pbuf_ref_chain() should be called and not pbuf_ref(). This change was made because it is possible for the head of the pbuf chain to have a different count than the payload pbuf which might have been passed by the application. Coldfire ethernet driver also had some minor other updates and STATS was changed to LWIP_STATS.
217 lines
8.0 KiB
C
217 lines
8.0 KiB
C
/*
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* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __LWIPOPTS_H__
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#define __LWIPOPTS_H__
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#define NO_SYS 0
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/*#define LWIP_EVENT_API 0*/
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/* ---------- Memory options ---------- */
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/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
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lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
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byte alignment -> define MEM_ALIGNMENT to 2. */
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#define MEM_ALIGNMENT 4
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/* MEM_SIZE: the size of the heap memory. If the application will send
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a lot of data that needs to be copied, this should be set high. */
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#define MEM_SIZE 65000
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/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
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sends a lot of data out of ROM (or other static memory), this
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should be set high. */
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#define MEMP_NUM_PBUF 16
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/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
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per active UDP "connection". */
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#define MEMP_NUM_UDP_PCB 4
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/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
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connections. */
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#define MEMP_NUM_TCP_PCB 5
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/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
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connections. */
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#define MEMP_NUM_TCP_PCB_LISTEN 8
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/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
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segments. */
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#define MEMP_NUM_TCP_SEG 16
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/* The following four are used only with the sequential API and can be
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set to 0 if the application only will use the raw API. */
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/* MEMP_NUM_NETBUF: the number of struct netbufs. */
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#define MEMP_NUM_NETBUF 6
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/* MEMP_NUM_NETCONN: the number of struct netconns. */
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#define MEMP_NUM_NETCONN 10
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/* MEMP_NUM_APIMSG: the number of struct api_msg, used for
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communication between the TCP/IP stack and the sequential
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programs. */
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#define MEMP_NUM_API_MSG 16
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/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
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for sequential API communication and incoming packets. Used in
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src/api/tcpip.c. */
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#define MEMP_NUM_TCPIP_MSG 16
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/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
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timeouts. */
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#define MEMP_NUM_SYS_TIMEOUT 3
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/* These two control is reclaimer functions should be compiled
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in. Should always be turned on (1). */
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#define MEM_RECLAIM 1
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#define MEMP_RECLAIM 1
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/* ---------- Pbuf options ---------- */
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/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
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#define PBUF_POOL_SIZE 128
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/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
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#define PBUF_POOL_BUFSIZE 1024
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/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
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link level header. */
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#define PBUF_LINK_HLEN 16
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/** SYS_LIGHTWEIGHT_PROT
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* define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
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* for certain critical regions during buffer allocation, deallocation and memory
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* allocation and deallocation.
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*/
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#define SYS_LIGHTWEIGHT_PROT 1
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/* ---------- TCP options ---------- */
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#define LWIP_TCP 1
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#define TCP_TTL 255
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/* Controls if TCP should queue segments that arrive out of
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order. Define to 0 if your device is low on memory. */
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#define TCP_QUEUE_OOSEQ 1
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/* TCP Maximum segment size. */
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#define TCP_MSS 128
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/* TCP sender buffer space (bytes). */
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#define TCP_SND_BUF 256
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/* TCP sender buffer space (pbufs). This must be at least = 2 *
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TCP_SND_BUF/TCP_MSS for things to work. */
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#define TCP_SND_QUEUELEN 4 * TCP_SND_BUF/TCP_MSS
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/* TCP receive window. */
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#define TCP_WND 1024
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/* Maximum number of retransmissions of data segments. */
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#define TCP_MAXRTX 12
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/* Maximum number of retransmissions of SYN segments. */
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#define TCP_SYNMAXRTX 4
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/* TCP writable space (bytes). This must be less than or equal
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to TCP_SND_BUF. It is the amount of space which must be
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available in the tcp snd_buf for select to return writable */
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#define TCP_SNDLOWAT TCP_SND_BUF/2
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/* ---------- ARP options ---------- */
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#define ARP_TABLE_SIZE 10
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#define ARP_QUEUEING 1
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/**
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* - If enabled, cache entries are generated for every kind of ARP traffic or
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* broadcast IP traffic. This enhances behaviour for sending to a dynamic set
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* of hosts, for example if acting as a gateway.
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* - If disabled, cache entries are generated only for IP destination addresses
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* in use by lwIP or applications. This enhances performance if sending to a small,
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* reasonably static number of hosts. Typically for embedded devices.
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*/
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#define ETHARP_ALWAYS_INSERT 0
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/* ---------- IP options ---------- */
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/* Define IP_FORWARD to 1 if you wish to have the ability to forward
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IP packets across network interfaces. If you are going to run lwIP
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on a device with only one network interface, define this to 0. */
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#define IP_FORWARD 0
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/* If defined to 1, IP options are allowed (but not parsed). If
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defined to 0, all packets with IP options are dropped. */
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#define IP_OPTIONS 1
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/* IP reassembly and segmentation.These are orthogonal even
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* if they both deal with IP fragments */
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#define IP_REASSEMBLY 1
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#define IP_FRAG 1
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/* ---------- ICMP options ---------- */
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#define ICMP_TTL 255
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/* ---------- DHCP options ---------- */
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/* Define LWIP_DHCP to 1 if you want DHCP configuration of
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interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
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turning this on does currently not work. */
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#define LWIP_DHCP 0
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/* 1 if you want to do an ARP check on the offered address
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(recommended). */
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#define DHCP_DOES_ARP_CHECK 1
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/* ---------- UDP options ---------- */
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#define LWIP_UDP 1
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#define UDP_TTL 255
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/* ---------- Statistics options ---------- */
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#define LWIP_STATS 1
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#ifdef LWIP_STATS
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#define LINK_STATS
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#define IP_STATS
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#define ICMP_STATS
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#define UDP_STATS
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#define TCP_STATS
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#define MEM_STATS
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#define MEMP_STATS
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#define PBUF_STATS
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#define SYS_STATS
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#endif /* STATS */
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#define LWIP_COMPAT_SOCKETS 1
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#define LWIP_PROVIDE_ERRNO 1
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/* People often make a mistake on the priority of their communications task.
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The TCP/IP stack should be at a relatively low priority if it is an endpoint
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(not a router) on a somewhat underpowered CPU. You are'nt going to keep up
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with network traffic during a denial of service attack or misconfigured network
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and you don't want an overburdened network task to cause other important tasks
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(including your UI) to stop working. Drop packets! It forces flow control and
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lets the rest of your system run.
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*/
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#define TCPIP_THREAD_PRIO 220 // Relatively low priority
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#define DEFAULT_THREAD_PRIO 240
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#endif /* __LWIPOPTS_H__ */
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