2 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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3 * All rights reserved.
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5 * Redistribution and use in source and binary forms, with or without modification,
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6 * are permitted provided that the following conditions are met:
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8 * 1. Redistributions of source code must retain the above copyright notice,
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9 * this list of conditions and the following disclaimer.
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10 * 2. Redistributions in binary form must reproduce the above copyright notice,
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11 * this list of conditions and the following disclaimer in the documentation
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12 * and/or other materials provided with the distribution.
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13 * 3. The name of the author may not be used to endorse or promote products
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14 * derived from this software without specific prior written permission.
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16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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27 * This file is part of the lwIP TCP/IP stack.
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29 * Author: Adam Dunkels <adam@sics.se>
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32 #ifndef __LWIPOPTS_H__
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33 #define __LWIPOPTS_H__
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35 #define LWIP_NOASSERT 1 // To suppress some errors for now (no debug output)
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36 #define SYS_LIGHTWEIGHT_PROT 1
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38 #define TCPIP_THREAD_PRIO 3
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40 /* ---------- Memory options ---------- */
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41 /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
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42 lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
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43 byte alignment -> define MEM_ALIGNMENT to 2. */
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44 #define MEM_ALIGNMENT 4
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46 /* MEM_SIZE: the size of the heap memory. If the application will send
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47 a lot of data that needs to be copied, this should be set high. */
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48 #define MEM_SIZE 2000
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50 /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
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51 sends a lot of data out of ROM (or other static memory), this
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52 should be set high. */
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53 #define MEMP_NUM_PBUF 20
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54 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
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55 per active UDP "connection". */
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56 #define MEMP_NUM_UDP_PCB 4
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57 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
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59 #define MEMP_NUM_TCP_PCB 10
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60 /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
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62 #define MEMP_NUM_TCP_PCB_LISTEN 8
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63 /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
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65 #define MEMP_NUM_TCP_SEG 8
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66 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
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68 #define MEMP_NUM_SYS_TIMEOUT 3
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71 /* The following four are used only with the sequential API and can be
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72 set to 0 if the application only will use the raw API. */
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73 /* MEMP_NUM_NETBUF: the number of struct netbufs. */
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74 #define MEMP_NUM_NETBUF 4
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75 /* MEMP_NUM_NETCONN: the number of struct netconns. */
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76 #define MEMP_NUM_NETCONN 4
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77 /* MEMP_NUM_APIMSG: the number of struct api_msg, used for
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78 communication between the TCP/IP stack and the sequential
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80 #define MEMP_NUM_API_MSG 8
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81 /* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
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82 for sequential API communication and incoming packets. Used in
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84 #define MEMP_NUM_TCPIP_MSG 8
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86 /* These two control is reclaimer functions should be compiled
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87 in. Should always be turned on (1). */
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88 #define MEM_RECLAIM 1
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89 #define MEMP_RECLAIM 1
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91 /* ---------- Pbuf options ---------- */
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92 /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
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93 #define PBUF_POOL_SIZE 4
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95 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
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96 #define PBUF_POOL_BUFSIZE 1500
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98 /* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
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99 link level header. */
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100 #define PBUF_LINK_HLEN 16
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102 /* ---------- TCP options ---------- */
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104 #define TCP_TTL 255
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106 /* Controls if TCP should queue segments that arrive out of
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107 order. Define to 0 if your device is low on memory. */
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108 #define TCP_QUEUE_OOSEQ 1
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110 /* TCP Maximum segment size. */
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111 #define TCP_MSS 1500
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113 /* TCP sender buffer space (bytes). */
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114 #define TCP_SND_BUF 1500
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116 /* TCP sender buffer space (pbufs). This must be at least = 2 *
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117 TCP_SND_BUF/TCP_MSS for things to work. */
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118 #define TCP_SND_QUEUELEN 6 * TCP_SND_BUF/TCP_MSS
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120 /* TCP receive window. */
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121 #define TCP_WND 1500
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123 /* Maximum number of retransmissions of data segments. */
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124 #define TCP_MAXRTX 12
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126 /* Maximum number of retransmissions of SYN segments. */
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127 #define TCP_SYNMAXRTX 4
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129 /* ---------- ARP options ---------- */
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130 #define ARP_TABLE_SIZE 10
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131 #define ARP_QUEUEING 1
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133 /* ---------- IP options ---------- */
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134 /* Define IP_FORWARD to 1 if you wish to have the ability to forward
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135 IP packets across network interfaces. If you are going to run lwIP
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136 on a device with only one network interface, define this to 0. */
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137 #define IP_FORWARD 1
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139 /* If defined to 1, IP options are allowed (but not parsed). If
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140 defined to 0, all packets with IP options are dropped. */
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141 #define IP_OPTIONS 1
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143 /* ---------- ICMP options ---------- */
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144 #define ICMP_TTL 255
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147 /* ---------- DHCP options ---------- */
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148 /* Define LWIP_DHCP to 1 if you want DHCP configuration of
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149 interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
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150 turning this on does currently not work. */
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151 #define LWIP_DHCP 0
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153 /* 1 if you want to do an ARP check on the offered address
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155 #define DHCP_DOES_ARP_CHECK 1
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157 /* ---------- UDP options ---------- */
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159 #define UDP_TTL 255
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162 /* ---------- Statistics options ---------- */
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166 #define LINK_STATS 1
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168 #define ICMP_STATS 1
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169 #define UDP_STATS 1
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170 #define TCP_STATS 1
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171 #define MEM_STATS 1
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172 #define MEMP_STATS 1
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173 #define PBUF_STATS 1
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174 #define SYS_STATS 1
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177 #define LWIP_PROVIDE_ERRNO 1
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179 #endif /* __LWIPOPTS_H__ */
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