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