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>
30 * Modifications: Christian Walter <wolti@sil.at>
32 #ifndef __LWIPOPTS_H__
33 #define __LWIPOPTS_H__
35 /* ------------------------ Generic options ------------------------------- */
38 #define SYS_LIGHTWEIGHT_PROT 1
39 #define TCPIP_THREAD_PRIO 3
42 #define DBG_TYPES_ON ( DBG_LEVEL_WARNING | DBG_LEVEL_SEVERE | DBG_LEVEL_SERIOUS )
43 #define FEC_DEBUG ( DBG_LEVEL_WARNING | DBG_ON )
45 /* ------------------------ Memory options -------------------------------- */
46 /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
47 lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
48 byte alignment -> define MEM_ALIGNMENT to 2. */
49 #define MEM_ALIGNMENT 4
51 /* MEM_SIZE: the size of the heap memory. If the application will send
52 a lot of data that needs to be copied, this should be set high. */
55 /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
56 sends a lot of data out of ROM (or other static memory), this
57 should be set high. */
58 #define MEMP_NUM_PBUF 20
59 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
60 per active UDP "connection". */
61 #define MEMP_NUM_UDP_PCB 4
62 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
64 #define MEMP_NUM_TCP_PCB 10
65 /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
67 #define MEMP_NUM_TCP_PCB_LISTEN 8
68 /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
70 #define MEMP_NUM_TCP_SEG 8
71 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
73 #define MEMP_NUM_SYS_TIMEOUT 3
75 /* The following four are used only with the sequential API and can be
76 set to 0 if the application only will use the raw API. */
77 /* MEMP_NUM_NETBUF: the number of struct netbufs. */
78 #define MEMP_NUM_NETBUF 4
79 /* MEMP_NUM_NETCONN: the number of struct netconns. */
80 #define MEMP_NUM_NETCONN 4
81 /* MEMP_NUM_APIMSG: the number of struct api_msg, used for
82 communication between the TCP/IP stack and the sequential
84 #define MEMP_NUM_API_MSG 8
85 /* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
86 for sequential API communication and incoming packets. Used in
88 #define MEMP_NUM_TCPIP_MSG 8
90 /* These two control is reclaimer functions should be compiled
91 in. Should always be turned on (1). */
93 #define MEMP_RECLAIM 1
95 /* ---------- Pbuf options ---------- */
96 /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
97 #define PBUF_POOL_SIZE 16
99 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
100 #define PBUF_POOL_BUFSIZE 512
102 /* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
103 link level header. */
104 #define PBUF_LINK_HLEN 16
106 /* ------------------------ TCP options ----------------------------------- */
110 /* Controls if TCP should queue segments that arrive out of
111 order. Define to 0 if your device is low on memory. */
112 #define TCP_QUEUE_OOSEQ 1
114 /* TCP Maximum segment size. */
117 /* TCP sender buffer space (bytes). */
118 #define TCP_SND_BUF 512
120 /* TCP sender buffer space (pbufs). This must be at least = 2 *
121 TCP_SND_BUF/TCP_MSS for things to work. */
122 #define TCP_SND_QUEUELEN 6 * TCP_SND_BUF/TCP_MSS
124 /* TCP receive window. */
127 /* Maximum number of retransmissions of data segments. */
128 #define TCP_MAXRTX 12
130 /* Maximum number of retransmissions of SYN segments. */
131 #define TCP_SYNMAXRTX 4
133 /* ------------------------ ARP options ----------------------------------- */
134 #define ARP_TABLE_SIZE 10
135 #define ARP_QUEUEING 1
137 /* ------------------------ IP options ------------------------------------ */
138 /* Define IP_FORWARD to 1 if you wish to have the ability to forward
139 IP packets across network interfaces. If you are going to run lwIP
140 on a device with only one network interface, define this to 0. */
143 /* If defined to 1, IP options are allowed (but not parsed). If
144 defined to 0, all packets with IP options are dropped. */
147 /* ------------------------ ICMP options ---------------------------------- */
151 /* ------------------------ DHCP options ---------------------------------- */
152 /* Define LWIP_DHCP to 1 if you want DHCP configuration of
153 interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
154 turning this on does currently not work. */
157 /* 1 if you want to do an ARP check on the offered address
159 #define DHCP_DOES_ARP_CHECK 1
161 /* ------------------------ UDP options ----------------------------------- */
165 /* ------------------------ Statistics options ---------------------------- */
180 #define LWIP_PROVIDE_ERRNO 1
182 #endif /* __LWIPOPTS_H__ */