1 | /* $Id: lwipopts.h 106061 2024-09-16 14:03:52Z vboxsync $ */
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2 | /** @file
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3 | * DHCP server - lwIP configuration options.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2013-2024 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * SPDX-License-Identifier: GPL-3.0-only
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26 | */
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27 |
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28 | #ifndef VBOX_INCLUDED_SRC_Dhcpd_lwipopts_h
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29 | #define VBOX_INCLUDED_SRC_Dhcpd_lwipopts_h
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30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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31 | # pragma once
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32 | #endif
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33 |
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34 | #include <VBox/cdefs.h> /* For VBOX_STRICT. */
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35 | #include <iprt/mem.h>
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36 | #include <iprt/alloca.h> /* This may include malloc.h (msc), which is something that has
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37 | * to be done before redefining any of the functions therein. */
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38 | #include <iprt/rand.h> /* see LWIP_RAND() definition */
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39 |
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40 | /** Make lwIP use the libc malloc, or more precisely (see below) the IPRT
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41 | * memory allocation functions. */
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42 | #define MEM_LIBC_MALLOC 1
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43 |
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44 | /** Set proper memory alignment. */
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45 | #if HC_ARCH_BITS == 64
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46 | # define MEM_ALIGNMENT 8
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47 | #else
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48 | #define MEM_ALIGNMENT 4
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49 | #endif
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50 |
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51 | /* Padding before Ethernet header to make IP header aligned */
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52 | #define ETH_PAD_SIZE 2
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53 |
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54 | /* IP */
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55 | #define IP_REASSEMBLY 1
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56 | #define IP_REASS_MAX_PBUFS 128
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57 |
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58 |
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59 |
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60 | /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
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61 | sends a lot of data out of ROM (or other static memory), this
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62 | should be set high.
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63 |
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64 | NB: This is for PBUF_ROM and PBUF_REF pbufs only!
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65 |
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66 | Number of PBUF_POOL pbufs is controlled by PBUF_POOL_SIZE that,
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67 | somewhat confusingly, breaks MEMP_NUM_* pattern.
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68 |
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69 | PBUF_RAM pbufs are allocated with mem_malloc (with MEM_LIBC_MALLOC
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70 | set to 1 this is just system malloc), not memp_malloc. */
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71 | #define MEMP_NUM_PBUF (1024 * 4)
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72 |
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73 |
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74 | /* MEMP_NUM_MLD6_GROUP: Maximum number of IPv6 multicast groups that
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75 | can be joined.
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76 |
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77 | We need to be able to join solicited node multicast for each
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78 | address (potentially different) and two groups for DHCP6. All
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79 | routers multicast is hardcoded in ip6.c and does not require
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80 | explicit joining. Provide also for a few extra groups just in
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81 | case. */
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82 | #define MEMP_NUM_MLD6_GROUP (LWIP_IPV6_NUM_ADDRESSES + /* dhcp6 */ 2 + /* extra */ 8)
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83 |
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84 |
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85 | /* MEMP_NUM_TCPIP_MSG_*: the number of struct tcpip_msg, which is used
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86 | for sequential API communication and incoming packets. Used in
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87 | src/api/tcpip.c. */
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88 | #define MEMP_NUM_TCPIP_MSG_API 128
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89 | #define MEMP_NUM_TCPIP_MSG_INPKT 1024
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90 |
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91 | /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
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92 | per active UDP "connection". */
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93 | #define MEMP_NUM_UDP_PCB 32
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94 |
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95 | /* Pbuf options */
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96 | /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool.
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97 | This is only for PBUF_POOL pbufs, primarily used by netif drivers.
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98 |
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99 | This should have been named with the MEMP_NUM_ prefix (cf.
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100 | MEMP_NUM_PBUF for PBUF_ROM and PBUF_REF) as it controls the size of
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101 | yet another memp_malloc() pool. */
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102 | #define PBUF_POOL_SIZE (1024 * 4)
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103 |
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104 | /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool.
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105 | Use default that is based on TCP_MSS and PBUF_LINK_HLEN. */
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106 | #undef PBUF_POOL_BUFSIZE
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107 |
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108 | /** Turn on support for lightweight critical region protection. Leaving this
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109 | * off uses synchronization code in pbuf.c which is totally polluted with
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110 | * races. All the other lwip source files would fall back to semaphore-based
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111 | * synchronization, but pbuf.c is just broken, leading to incorrect allocation
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112 | * and as a result to assertions due to buffers being double freed. */
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113 | #define SYS_LIGHTWEIGHT_PROT 1
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114 |
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115 | /** Attempt to get rid of htons etc. macro issues. */
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116 | #undef LWIP_PREFIX_BYTEORDER_FUNCS
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117 |
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118 | #define LWIP_TCPIP_CORE_LOCKING_INPUT 0
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119 | #define LWIP_TCPIP_CORE_LOCKING 0
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120 |
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121 | #define LWIP_NETCONN 0
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122 | #define LWIP_SOCKET 0
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123 | #define LWIP_COMPAT_SOCKETS 0
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124 | #define LWIP_COMPAT_MUTEX 1
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125 |
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126 | #define LWIP_TCP 0
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127 | #define LWI_UDP 1
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128 | #define LWIP_ARP 1
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129 | #define ARP_PROXY 0
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130 | #define LWIP_ETHERNET 1
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131 |
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132 | /* accept any->broadcast */
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133 | #define LWIP_IP_ACCEPT_UDP_PORT(port) ((port) == PP_NTOHS(/*DHCP_SERVER_PORT*/ 67))
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134 |
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135 | #define LWIP_IPV6 0
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136 | #define LWIP_IPV6_FORWARD 0
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137 | #define LWIP_ND6_PROXY 0
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138 |
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139 | #define LWIP_ND6_ALLOW_RA_UPDATES (!LWIP_IPV6_FORWARD)
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140 | #define LWIP_IPV6_SEND_ROUTER_SOLICIT (!LWIP_IPV6_FORWARD)
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141 | /* IPv6 autoconfig we don't need in proxy, but it required for very seldom cases
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142 | * iSCSI over intnet with IPv6
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143 | */
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144 | #define LWIP_IPV6_AUTOCONFIG 1
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145 | #if LWIP_IPV6_FORWARD /* otherwise use the default from lwip/opt.h */
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146 | #define LWIP_IPV6_DUP_DETECT_ATTEMPTS 0
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147 | #endif
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148 |
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149 | #define LWIP_IPV6_FRAG 1
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150 |
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151 | /**
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152 | * aka Slirp mode.
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153 | */
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154 | #define LWIP_CONNECTION_PROXY 0
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155 | #define IP_FORWARD 0
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156 |
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157 | /* MEMP_NUM_SYS_TIMEOUT: the number of simultaneously active
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158 | timeouts. */
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159 | #define MEMP_NUM_SYS_TIMEOUT 16
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160 |
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161 |
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162 | /* this is required for IPv6 and IGMP needs */
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163 | #define LWIP_RAND() RTRandU32()
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164 |
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165 | /* Debugging stuff. */
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166 | #ifdef DEBUG
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167 | # define LWIP_DEBUG
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168 | # include "lwip-log.h"
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169 |
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170 | # define LWIP_PROXY_DEBUG LWIP_DBG_OFF
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171 | #endif /* DEBUG */
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172 |
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173 | /* printf formatter definitions */
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174 | #define U16_F "hu"
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175 | #define S16_F "hd"
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176 | #define X16_F "hx"
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177 | #define U32_F "u"
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178 | #define S32_F "d"
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179 | #define X32_F "x"
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180 |
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181 | /* Redirect libc memory alloc functions to IPRT. */
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182 | #define malloc(x) RTMemAlloc(x)
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183 | #define realloc(x,y) RTMemRealloc((x), (y))
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184 | #define free(x) RTMemFree(x)
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185 |
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186 | /* Align VBOX_STRICT and LWIP_NOASSERT. */
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187 | #ifndef VBOX_STRICT
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188 | # define LWIP_NOASSERT 1
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189 | #endif
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190 |
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191 | #endif /* !VBOX_INCLUDED_SRC_Dhcpd_lwipopts_h */
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