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devs/nand/micron_mt29: Remove defunct references (in comments) to mt29f2g08_oob_ecc.
author Ross Younger <wry@ecoscentric.com>
date Sun, 18 Jan 2015 17:59:01 +1300
parents 9b59569aaea9
children
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1 //=============================================================================
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2 //
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3 // dns.c
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4 //
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5 // DNS client code
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6 //
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7 //=============================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //=============================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): jskov
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43 // Contributors:jskov
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44 // Date: 2001-09-26
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45 // Description: Provides DNS lookup as per RFC 1034/1035.
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46 //
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47 // Note: This is a stripped down clone of dns.c from the CYGPKG_NS_DNS
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48 // package which does not use malloc/free and has been tweaked to
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49 // use UDP via RedBoot's network stack. Also adds commands
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50 // to set the DNS server IP at runtime.
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //=============================================================================
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55
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56 #include <cyg/hal/drv_api.h>
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57 #include <cyg/infra/cyg_type.h>
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58 #include <cyg/infra/cyg_trac.h> /* Tracing support */
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59
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60 #include <net/net.h>
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61 #include <redboot.h>
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62 /* #include <cyg/ns/dns/dns.h> - it's been moved to redboot.h */
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63 #include <cyg/ns/dns/dns_priv.h>
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64
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65 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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66 #include <flash_config.h>
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67
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68 RedBoot_config_option("DNS server IP address",
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69 dns_ip,
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70 ALWAYS_ENABLED, true,
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71 CONFIG_IP,
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72 0
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73 );
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74
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75 RedBoot_config_option("DNS domain name",
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76 dns_domain,
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77 ALWAYS_ENABLED, true,
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78 CONFIG_STRING,
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79 ""
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80 );
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81 #endif
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82
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83 /* So we remember which ports have been used */
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84 static int get_port = 7700;
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85
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86 #define DOMAIN_PORT 53
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87
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88 /* Some magic to make dns_impl.inl compile under RedBoot */
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89 #define sprintf diag_sprintf
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90
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91 /* DNS server address possibly returned from bootp */
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92 struct in_addr __bootp_dns_addr;
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93 cyg_bool __bootp_dns_set = false;
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94
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95 /* DNS domain name possibly returned from bootp */
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96 #ifdef CYGPKG_REDBOOT_NETWORKING_DNS_DHCP_DOMAIN
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97 char __bootp_dns_domain[CYGNUM_REDBOOT_NETWORK_DNS_DOMAIN_BUFSIZE];
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98 cyg_bool __bootp_dns_domain_set = false;
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99 #endif
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100
208
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101 struct sockaddr_in server;
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102
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103 /* static buffers so we can make do without malloc */
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104 static struct hostent _hent;
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105 static char* _h_addr_list[2];
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106 static struct in_addr _h_addr_list0;
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107 static int _hent_alloc = 0;
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108
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109 #define _STRING_COUNT 2
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110 #define _STRING_LENGTH 64
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111 static char _strings[_STRING_COUNT][_STRING_LENGTH];
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112 static int _strings_alloc = 0;
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113
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114 /* as in dns.c proper */
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115 static short id = 0; /* ID of the last query */
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116 static int s = -1; /* Socket to the DNS server */
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117 static cyg_drv_mutex_t dns_mutex; /* Mutex to stop multiple queries as once */
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118 static char * domainname=NULL; /* Domain name used for queries */
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119
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120
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121 /* Allocate space for string of length (len). Return NULL on
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122 failure. */
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123 static char*
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124 alloc_string(int len)
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125 {
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126 int i;
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127
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128 if (len > _STRING_LENGTH)
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129 return NULL;
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130
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131 for (i = 0; i < _STRING_COUNT; i++) {
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132 if (_strings_alloc & (1 << i)) continue;
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133 _strings_alloc |= (1<<i);
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134 return _strings[i];
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135 }
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136 return NULL;
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137 }
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138
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139 static void
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140 free_string(char* s)
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141 {
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142 int i;
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143 for (i = 0; i < _STRING_COUNT; i++) {
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144 if (_strings[i] == s) {
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145 _strings_alloc &= ~(1<<i);
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146 break;
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147 }
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148 }
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149 }
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150
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151 /* Deallocate the memory taken to hold a hent structure */
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152 static void
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153 free_hent(struct hostent * hent)
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154 {
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155 if (hent->h_name) {
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156 free_string(hent->h_name);
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157 }
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158 _hent_alloc = 0;
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159 }
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160
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161 /* Allocate hent structure with room for one in_addr. Returns NULL on
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162 failure. */
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163 static struct hostent*
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164 alloc_hent(void)
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165 {
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166 struct hostent *hent;
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167
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168 if (_hent_alloc) return NULL;
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169
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170 hent = &_hent;
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171 memset(hent, 0, sizeof(struct hostent));
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172 hent->h_addr_list = _h_addr_list;
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173 hent->h_addr_list[0] = (char*)&_h_addr_list0;
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174 hent->h_addr_list[1] = NULL;
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175 _hent_alloc = 1;
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176
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177 return hent;
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178 }
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179
210
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180 static __inline__ void
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181 free_stored_hent(void)
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182 {
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183 free_hent( &_hent );
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184 }
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185
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186 static __inline__ void
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187 store_hent(struct hostent *hent)
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188 {
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189 hent=hent; // avoid warning
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190 }
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191
208
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192 /* Send the query to the server and read the response back. Return -1
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193 if it fails, otherwise put the response back in msg and return the
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194 length of the response. */
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195 static int
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196 send_recv(char * msg, int len, int msglen)
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197 {
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198 struct dns_header *dns_hdr;
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199 int finished = false;
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200 int read = 0;
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201
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202 dns_hdr = (struct dns_header *) msg;
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203
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204 do {
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205 int len_togo = len;
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206 struct timeval timeout;
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207 struct sockaddr_in local_addr, from_addr;
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208
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209 memset((char *)&local_addr, 0, sizeof(local_addr));
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210 local_addr.sin_family = AF_INET;
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211 local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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212 local_addr.sin_port = htons(get_port++);
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213
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214 if (__udp_sendto(msg, len_togo, &server, &local_addr) < 0)
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215 return -1;
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216
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217 memset((char *)&from_addr, 0, sizeof(from_addr));
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218
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219 timeout.tv_sec = CYGNUM_REDBOOT_NETWORKING_DNS_TIMEOUT;
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220 timeout.tv_usec = 0;
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221
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222 read = __udp_recvfrom(msg, len, &from_addr, &local_addr, &timeout);
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223 if (read < 0)
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224 return -1;
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225
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226 /* Reply to an old query. Ignore it */
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227 if (ntohs(dns_hdr->id) != (id-1)) {
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228 continue;
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229 }
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230 finished = true;
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231 } while (!finished);
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232
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233 return read;
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234 }
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235
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236 void
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237 set_dns(char* new_ip)
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238 {
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239 in_addr_t dns_ip;
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240
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241 memset(&server.sin_addr, 0, sizeof(server.sin_addr));
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242 if (!inet_aton(new_ip, &dns_ip)) {
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243 diag_printf("Bad DNS server address: %s\n", new_ip);
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244 } else {
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245 memcpy(&server.sin_addr, &dns_ip, sizeof(dns_ip));
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246 /* server config is valid */
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247 s = 0;
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248 }
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249 }
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250
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251 void
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252 show_dns(void)
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253 {
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254 diag_printf("\nDNS server IP: %s, DNS domain name: %s",
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255 inet_ntoa((in_addr_t *)&server.sin_addr),
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256 domainname);
208
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257 if (0 == server.sin_addr.s_addr) {
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258 s = -1;
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259 }
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260 }
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261
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262 /* Initialise the resolver. Open a socket and bind it to the address
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263 of the server. return -1 if something goes wrong, otherwise 0 */
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264 int
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265 redboot_dns_res_init(void)
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266 {
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267 #ifdef CYGPKG_REDBOOT_NETWORKING_DNS_FCONFIG_DOMAIN
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268 char *dns_domain = NULL;
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269 #endif
208
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270 memset((char *)&server, 0, sizeof(server));
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271 server.sin_len = sizeof(server);
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272 server.sin_family = AF_INET;
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273 server.sin_port = htons(DOMAIN_PORT);
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274 cyg_drv_mutex_init(&dns_mutex);
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275
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276 /* Set the default DNS domain first, so that it can be overwritten
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277 latter */
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278 #ifdef CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN
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279 setdomainname(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN),
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280 strlen(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN)));
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281 #endif
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282 /* Set the domain name from flash so that DHCP can later
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283 overwrite it. */
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284 #ifdef CYGPKG_REDBOOT_NETWORKING_DNS_FCONFIG_DOMAIN
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285 flash_get_config("dns_domain", &dns_domain, CONFIG_STRING);
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286 if(dns_domain != NULL && dns_domain[0] != '\0')
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287 setdomainname(dns_domain, strlen(dns_domain));
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288 #endif
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289
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290 /* If we got a DNS server address from the DHCP/BOOTP, then use
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291 that address */
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292 if ( __bootp_dns_set ) {
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293 memcpy(&server.sin_addr, &__bootp_dns_addr,
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294 sizeof(__bootp_dns_addr) );
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295
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296 #ifdef CYGPKG_REDBOOT_NETWORKING_DNS_DHCP_DOMAIN
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297 if(__bootp_dns_domain_set)
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298 setdomainname(__bootp_dns_domain, strlen(__bootp_dns_domain));
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299 #endif
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300 /* server config is valid */
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301 s = 0;
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302 }
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303 else {
208
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304 #ifdef CYGSEM_REDBOOT_FLASH_CONFIG
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305 {
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306 ip_addr_t dns_ip;
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307
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308 flash_get_config("dns_ip", &dns_ip, CONFIG_IP);
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309 if (dns_ip[0] == 0 && dns_ip[1] == 0 &&
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310 dns_ip[2] == 0 && dns_ip[3] == 0)
208
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311 return -1;
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312 memcpy(&server.sin_addr, &dns_ip, sizeof(dns_ip));
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313 /* server config is valid */
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314 s = 0;
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315 }
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316 #else
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317 // Use static configuration. If CYGPKG_REDBOOT_NETWORKING_DNS_IP
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318 // is valid s will set set as a side effect.
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319 set_dns(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_IP));
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320 #endif
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321 }
208
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322
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323 return 0;
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324 }
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325
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326 /* Include the DNS client implementation code */
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327 #include <cyg/ns/dns/dns_impl.inl>