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annotate packages/net/common/current/src/dhcp_prot.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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children 6eb55882e01c
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1 /*==========================================================================
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2 //
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3 // dhcp_prot.c
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4 //
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5 // DHCP protocol implementation for DHCP client
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6 //
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7 //==========================================================================
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8 //####ECOSPDCOPYRIGHTBEGIN####
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9 //
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10 // Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
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11 // All Rights Reserved.
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12 //
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13 // Permission is granted to use, copy, modify and redistribute this
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14 // file.
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15 //
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16 //####ECOSPDCOPYRIGHTEND####
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17 //==========================================================================
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18 //#####DESCRIPTIONBEGIN####
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19 //
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20 // Author(s): hmt
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21 // Contributors: gthomas
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22 // Date: 2000-07-01
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23 // Purpose: DHCP support
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24 // Description:
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25 //
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26 //####DESCRIPTIONEND####
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27 //
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28 //========================================================================*/
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29
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30 #include <pkgconf/system.h>
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31 #include <pkgconf/net.h>
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32
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33 #ifdef CYGPKG_NET_DHCP
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34
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35 #if 0
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36 #define perror( txt ) // nothing
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37 #endif
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38
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39 #include <network.h>
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40 #include <dhcp.h>
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41
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42 #include <cyg/infra/cyg_ass.h>
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43
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44 // ------------------------------------------------------------------------
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45 // Returns a pointer to the end of dhcp message (or NULL if invalid)
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46 // meaning the address of the byte *after* the TAG_END token in the vendor
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47 // data.
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48
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49 static unsigned char *
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50 scan_dhcp_size( struct bootp *ppkt )
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51 {
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52 unsigned char *op;
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53
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54 op = &ppkt->bp_vend[0];
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55 // First check for the cookie!
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56 if ( op[0] != 99 ||
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57 op[1] != 130 ||
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58 op[2] != 83 ||
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59 op[3] != 99 ) {
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60 CYG_FAIL( "Bad DHCP cookie" );
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61 return NULL;
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62 }
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63 op += 4;
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64 while (*op != TAG_END) {
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65 op += *(op+1)+2;
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66 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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67 CYG_FAIL( "Oversize DHCP packet in dhcp_size" );
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68 return NULL;
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69 }
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70 }
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71 // Check op has not gone wild
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72 CYG_ASSERT( op > (unsigned char *)(&ppkt[0]), "op pointer underflow!" );
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73 // Compare op with non-existent "next" struct bootp in the array.
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74 CYG_ASSERT( op < (unsigned char *)(&ppkt[1]), "op pointer overflow!" );
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75 return op + 1; // Address of first invalid byte
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76 }
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77
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78 // ------------------------------------------------------------------------
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79 // Get the actual packet size of an initialized buffer
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80
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81 static int
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82 dhcp_size( struct bootp *ppkt )
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83 {
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84 unsigned char *op;
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85
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86 op = scan_dhcp_size( ppkt );
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87 if ( !op ) return 0;
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88 return (op - (unsigned char *)ppkt);
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89 }
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90
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91
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92 // ------------------------------------------------------------------------
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93 // Get the actual packet size of an initialized buffer
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94 // This will also pad the packet with 0 if length is less
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95 // than BP_STD_TX_MINPKTSZ.
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96
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97 static int
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98 dhcp_size_for_send( struct bootp *ppkt )
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99 {
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100 unsigned char *op;
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101
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102 op = scan_dhcp_size( ppkt );
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103 if ( !op ) return 0; // Better not scribble!
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104 // Zero extra bytes until the packet is large enough.
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105 for ( ; op < (((unsigned char *)ppkt) + BP_STD_TX_MINPKTSZ); op++ )
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106 *op = 0;
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107 return (op - (unsigned char *)ppkt);
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108 }
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109
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110 // ------------------------------------------------------------------------
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111 // Insert/set an option value in an initialized buffer
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112
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113 static int
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114 set_fixed_tag( struct bootp *ppkt,
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115 unsigned char tag,
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116 cyg_uint32 value,
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117 int len)
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118 {
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119 unsigned char *op;
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120
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121 // Initially this will only scan the options field.
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122
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123 op = &ppkt->bp_vend[4];
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124 while (*op != TAG_END) {
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125 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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126 CYG_FAIL( "Oversize DHCP packet in set_fixed_tag" );
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127 return false;
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128 }
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129 if (*op == tag) // Found it...
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130 break;
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131 op += *(op+1)+2;
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132 }
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133
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134 if (*op == tag) { // Found it...
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135 if ( *(op+1) != len ) {
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136 CYG_FAIL( "Wrong size in set_fixed_tag" );
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137 return false; // wrong size
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138 }
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139 }
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140 else { // overwrite the end tag and install a new one
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141 if ( op + len + 2 > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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142 CYG_FAIL( "Oversize DHCP packet in set_fixed_tag append" );
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143 return false;
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144 }
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145 *op = tag;
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146 *(op+1) = len;
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147 *(op + len + 2) = TAG_END;
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148 }
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149 // and insert the value. Net order is BE.
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150 op += len + 2 - 1; // point to end of value
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151 while ( len-- > 0 ) {
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152 *op-- = (unsigned char)(value & 255);
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153 value >>= 8;
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154 }
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155 return true;
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156 }
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157
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158 // Note that this does not permit changing the size of an extant tag.
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159 static int
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160 set_variable_tag( struct bootp *ppkt,
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161 unsigned char tag,
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162 cyg_uint8 *pvalue,
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163 int len)
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164 {
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165 unsigned char *op;
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166
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167 // Initially this will only scan the options field.
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168 op = &ppkt->bp_vend[4];
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169 while (*op != TAG_END) {
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170 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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171 CYG_FAIL( "Oversize DHCP packet in set_variable_tag" );
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172 return false;
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173 }
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174 if (*op == tag) // Found it...
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175 break;
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176 op += *(op+1)+2;
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177 }
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178
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179 if (*op == tag) { // Found it...
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180 if ( *(op+1) != len ) {
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181 CYG_FAIL( "Wrong size in set_variable_tag" );
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182 return false; // wrong size
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183 }
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184 }
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185 else { // overwrite the end tag and install a new one
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186 if ( op + len + 2 > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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187 CYG_FAIL( "Oversize DHCP packet in set_variable_tag append" );
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188 return false;
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189 }
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190 *op = tag;
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191 *(op+1) = len;
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192 *(op + len + 2) = TAG_END;
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193 }
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194 // and insert the value. No order is implied.
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195 op += 2; // point to start of value
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196 while ( len-- > 0 ) {
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197 *op++ = *pvalue++;
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198 }
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199 return true;
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200 }
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201
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202 static int
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203 unset_tag( struct bootp *ppkt,
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204 unsigned char tag )
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205 {
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206 unsigned char *op, *nextp = 0, *killp = 0;
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207
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208 // Initially this will only scan the options field.
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209
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210 op = &ppkt->bp_vend[4];
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211 while (*op != TAG_END) {
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212 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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213 CYG_FAIL( "Oversize DHCP packet in unset_tag" );
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214 return false;
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215 }
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216 if (*op == tag) { // Found it...
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217 killp = op; // item to kill
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218 nextp = op + *(op+1)+2; // next item address
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219 }
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220 op += *(op+1)+2; // scan to the end
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221 }
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222
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223 if ( !killp )
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224 return false;
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225
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226 // Obliterate the found op by copying down: *op is the end.
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227 while( nextp <= op ) // <= to copy the TAG_END too.
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228 *killp++ = *nextp++;
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229
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230 return true;
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231 }
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232
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233 // ------------------------------------------------------------------------
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234 // Bring up an interface enough to broadcast, before we know who we are
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235
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236 static int
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237 bring_half_up(const char *intf, struct ifreq *ifrp )
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238 {
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239 int s;
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240 int one = 1;
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241
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242 struct sockaddr_in *addrp;
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243 struct ecos_rtentry route;
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244
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245 // Ensure clean slate
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246 cyg_route_reinit(); // Force any existing routes to be forgotten
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247
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248 s = socket(AF_INET, SOCK_DGRAM, 0);
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249 if (s < 0) {
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250 perror("socket");
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251 return false;
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252 }
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253
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254 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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255 perror("setsockopt");
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256 return false;
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257 }
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258
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259 addrp = (struct sockaddr_in *) &ifrp->ifr_addr;
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260 memset(addrp, 0, sizeof(*addrp));
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261 addrp->sin_family = AF_INET;
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262 addrp->sin_len = sizeof(*addrp);
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263 addrp->sin_port = 0;
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264 addrp->sin_addr.s_addr = INADDR_ANY;
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265
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266 strcpy(ifrp->ifr_name, intf);
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267 if (ioctl(s, SIOCSIFADDR, ifrp)) { /* set ifnet address */
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268 perror("SIOCSIFADDR");
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269 return false;
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270 }
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271
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272 if (ioctl(s, SIOCSIFNETMASK, ifrp)) { /* set net addr mask */
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273 perror("SIOCSIFNETMASK");
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274 return false;
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275 }
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276
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277 /* the broadcast address is 255.255.255.255 */
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278 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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279 if (ioctl(s, SIOCSIFBRDADDR, ifrp)) { /* set broadcast addr */
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280 perror("SIOCSIFBRDADDR");
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281 return false;
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282 }
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283
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284 ifrp->ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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285 if (ioctl(s, SIOCSIFFLAGS, ifrp)) { /* set ifnet flags */
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286 perror("SIOCSIFFLAGS up");
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287 return false;
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288 }
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289
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290 if (ioctl(s, SIOCGIFHWADDR, ifrp) < 0) { /* get MAC address */
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291 perror("SIOCGIFHWADDR 1");
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292 return false;
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293 }
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294
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295 // Set up routing
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296 addrp->sin_family = AF_INET;
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297 addrp->sin_port = 0;
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298 addrp->sin_len = sizeof(*addrp); // Size of address
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299
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300 /* the broadcast address is 255.255.255.255 */
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301 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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302 memset(&route, 0, sizeof(route));
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303 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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304
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305 addrp->sin_addr.s_addr = INADDR_ANY;
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306 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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307 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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308
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309 route.rt_dev = ifrp->ifr_name;
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310 route.rt_flags = RTF_UP|RTF_GATEWAY;
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311 route.rt_metric = 0;
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312
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313 if (ioctl(s, SIOCADDRT, &route)) { /* add route */
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314 if (errno != EEXIST) {
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315 perror("SIOCADDRT 3");
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316 return false;
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317 }
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318 }
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319
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320 close(s);
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321
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322 return true;
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323 }
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324
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325
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326 // ------------------------------------------------------------------------
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327 // DHCP retransmission timeouts and number of tries
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328 //
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329 // To work better with simulated failures (or real ones!) so that the rest
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330 // of the system is tested, rather than DHCP renewal failures pulling
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331 // everything down, we try a little more zealously than the RFC suggests.
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332
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333 static unsigned char timeout_random = 0;
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334
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335 struct timeout_state {
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336 unsigned int secs;
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337 int countdown;
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338 };
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339
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340 static inline void reset_timeout( struct timeval *ptv, struct timeout_state *pstate )
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341 {
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342 timeout_random++;
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343 pstate->countdown = 4; // initial fast retries
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344 pstate->secs = 3 + (timeout_random & 3);
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345 ptv->tv_sec = 0;
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346 ptv->tv_usec = 65536 * (2 + (timeout_random & 3)); // 0.1 - 0.3S, about
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347 }
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348
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349 static inline int next_timeout( struct timeval *ptv, struct timeout_state *pstate )
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350 {
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351 if ( 0 < pstate->countdown-- )
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352 return true;
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353 if ( 0 == ptv->tv_sec )
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354 ptv->tv_sec = pstate->secs;
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355 else {
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356 timeout_random++;
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357 pstate->secs = ptv->tv_sec * 2 - 2 + (timeout_random & 3);
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358 pstate->countdown = 2; // later fast retries
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359 ptv->tv_sec = 0;
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360 }
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361 return pstate->secs < 100; // If longer, too many tries...
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362 }
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363
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364 // ------------------------------------------------------------------------
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365 // Lease expiry and alarms to notify it
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366
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367 static cyg_alarm_t alarm_function;
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368
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369 static void alarm_function(cyg_handle_t alarm, cyg_addrword_t data)
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370 {
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371 struct dhcp_lease *lease = (struct dhcp_lease *)data;
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372 lease->which |= lease->next;
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373 if ( lease->needs_attention )
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374 cyg_semaphore_post( lease->needs_attention );
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375
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376 // Step the lease on into its next state of being alarmed ;-)
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377 if ( lease->next & DHCP_LEASE_EX ) {
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378 cyg_alarm_disable( alarm );
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379 }
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380 else if ( lease->next & DHCP_LEASE_T2 ) {
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381 lease->next = DHCP_LEASE_EX;
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382 cyg_alarm_initialize( lease->alarm, lease->expiry, 0 );
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383 cyg_alarm_enable( lease->alarm );
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384 }
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385 else if ( lease->next & DHCP_LEASE_T1 ) {
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386 lease->next = DHCP_LEASE_T2;
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387 cyg_alarm_initialize( lease->alarm, lease->t2, 0 );
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388 cyg_alarm_enable( lease->alarm );
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389 }
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390 }
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391
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392 static inline void no_lease( struct dhcp_lease *lease )
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393 {
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394 if ( lease->alarm ) {
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395 // Already set: delete this.
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396 cyg_alarm_disable( lease->alarm );
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397 cyg_alarm_delete( lease->alarm );
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398 lease->alarm = 0;
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399 }
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400 }
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401
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402 static inline void new_lease( struct bootp *bootp, struct dhcp_lease *lease )
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403 {
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404 cyg_tick_count_t now = cyg_current_time();
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405 cyg_tick_count_t then;
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406 cyg_uint32 tag = 0;
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407 cyg_uint32 expiry_then;
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408 cyg_resolution_t resolution =
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409 cyg_clock_get_resolution(cyg_real_time_clock());
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410 cyg_handle_t h;
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411 unsigned int length;
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412
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413 // Silence any jabbering from past lease on this interface
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414 no_lease( lease );
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415 lease->which = lease->next = 0;
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416 cyg_clock_to_counter(cyg_real_time_clock(), &h);
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417 cyg_alarm_create( h, alarm_function, (cyg_addrword_t)lease,
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418 &lease->alarm, &lease->alarm_obj );
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419
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420 // extract the lease time and scale it &c to now.
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421 length = sizeof(tag);
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422 if(!get_bootp_option( bootp, TAG_DHCP_LEASE_TIME, &tag ,&length))
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423 tag = 0xffffffff;
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424
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425 if ( 0xffffffff == tag ) {
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426 lease->expiry = 0xffffffffffffffff;
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427 lease->t2 = 0xffffffffffffffff;
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428 lease->t1 = 0xffffffffffffffff;
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429 return; // it's an infinite lease, hurrah!
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430 }
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diff changeset
431
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432 then = (cyg_uint64)(ntohl(tag));
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diff changeset
433 expiry_then = then;
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diff changeset
434
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435 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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436 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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437 lease->expiry = now + then;
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diff changeset
438 length = sizeof(tag);
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diff changeset
439 if (get_bootp_option( bootp, TAG_DHCP_REBIND_TIME, &tag, &length ))
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440 then = (cyg_uint64)(ntohl(tag));
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441 else
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442 then = expiry_then - expiry_then/4;
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443 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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444 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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445 lease->t2 = now + then;
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diff changeset
446
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447 length = sizeof(tag);
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448 if (get_bootp_option( bootp, TAG_DHCP_RENEWAL_TIME, &tag, &length ))
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449 then = (cyg_uint64)(ntohl(tag));
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450 else
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451 then = expiry_then/2;
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452 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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453 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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454 lease->t1 = now + then;
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455
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456 #if 0 // for testing this mechanism
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457 lease->expiry = now + 5000; // 1000 here makes for failure in the DHCP test
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458 lease->t2 = now + 3500;
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459 lease->t1 = now + 2500;
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diff changeset
460 #endif
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461
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462 #ifdef CYGDBG_NET_DHCP_CHATTER
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463 diag_printf("new_lease:\n");
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464 diag_printf(" expiry = %d\n",lease->expiry);
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465 diag_printf(" t1 = %d\n",lease->t1);
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466 diag_printf(" t2 = %d\n",lease->t2);
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467 #endif
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468
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469 lease->next = DHCP_LEASE_T1;
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470
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471 cyg_alarm_initialize( lease->alarm, lease->t1, 0 );
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472 cyg_alarm_enable( lease->alarm );
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473 }
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474
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475 // ------------------------------------------------------------------------
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476 // Set all the tags we want to use when sending a packet.
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477 // This has expanded to a large, explicit set to interwork better
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478 // with a variety of DHCP servers.
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479
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480 static void set_default_dhcp_tags( struct bootp *xmit )
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481 {
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482 // Explicitly request full set of params that are default for LINUX
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483 // dhcp servers, but not default for others. This is rather arbitrary,
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484 // but it preserves behaviour for people using those servers.
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485 // Perhaps configury of this set will be needed in future?
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486 //
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487 // Here's the set:
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488 static cyg_uint8 req_list[] = {
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489 #ifdef CYGOPT_NET_DHCP_PARM_REQ_LIST_REPLACE
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490 CYGOPT_NET_DHCP_PARM_REQ_LIST_REPLACE ,
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491 #else
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492 TAG_DHCP_SERVER_ID , // DHCP server id: 10.16.19.66
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493 TAG_DHCP_LEASE_TIME , // DHCP time 51: 60
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494 TAG_DHCP_RENEWAL_TIME , // DHCP time 58: 30
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495 TAG_DHCP_REBIND_TIME , // DHCP time 59: 52
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496 TAG_SUBNET_MASK , // subnet mask: 255.255.255.0
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497 TAG_GATEWAY , // gateway: 10.16.19.66
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498 TAG_DOMAIN_SERVER , // domain server: 10.16.19.66
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499 TAG_DOMAIN_NAME , // domain name: hmt10.cambridge.redhat.com
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500 TAG_IP_BROADCAST , // IP broadcast: 10.16.19.255
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501 #endif
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502 #ifdef CYGOPT_NET_DHCP_PARM_REQ_LIST_ADDITIONAL
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503 CYGOPT_NET_DHCP_PARM_REQ_LIST_ADDITIONAL ,
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504 #endif
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505 };
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506
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507 if ( req_list[0] ) // So that one may easily turn it all off by configury
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508 set_variable_tag( xmit, TAG_DHCP_PARM_REQ_LIST,
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509 &req_list[0], sizeof( req_list ) );
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510
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511 // Explicitly specify our max message size.
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512 set_fixed_tag( xmit, TAG_DHCP_MAX_MSGSZ, BP_MINPKTSZ, 2 );
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513 }
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514
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515 // ------------------------------------------------------------------------
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516 // the DHCP state machine - this does all the work
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517
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518 int
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519 do_dhcp(const char *intf, struct bootp *res,
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520 cyg_uint8 *pstate, struct dhcp_lease *lease)
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521 {
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522 struct ifreq ifr;
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diff changeset
523 struct sockaddr_in cli_addr, broadcast_addr, server_addr, rx_addr;
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524 int s, addrlen;
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525 int one = 1;
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526 unsigned char mincookie[] = {99,130,83,99,255} ;
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527 struct timeval tv;
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528 struct timeout_state timeout_scratch;
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529 cyg_uint8 oldstate = *pstate;
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530 cyg_uint8 msgtype = 0, seen_bootp_reply = 0;
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diff changeset
531 unsigned int length;
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532
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533 cyg_uint32 xid;
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534
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535 #define CHECK_XID() ( /* and other details */ \
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536 received->bp_xid != xid || /* not the same transaction */ \
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537 received->bp_htype != xmit->bp_htype || /* not the same ESA type */ \
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538 received->bp_hlen != xmit->bp_hlen || /* not the same length */ \
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539 bcmp( &received->bp_chaddr, &xmit->bp_chaddr, xmit->bp_hlen ) \
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540 )
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541
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542 // IMPORTANT: xmit is the same as res throughout this; *received is a
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543 // scratch buffer for reception; its contents are always copied to res
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544 // when we are happy with them. So we always transmit from the
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jlarmour
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545 // existing state.
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546 struct bootp rx_local;
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547 struct bootp *received = &rx_local;
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548 struct bootp *xmit = res;
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549
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550 // First, get a socket on the interface in question. But Zeroth, if
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551 // needs be, bring it to the half-up broadcast only state if needs be.
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552
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553 if ( DHCPSTATE_INIT == oldstate
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554 || DHCPSTATE_FAILED == oldstate
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jlarmour
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diff changeset
555 || 0 == oldstate ) {
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556 // either explicit init state or the beginning of time or retry
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diff changeset
557 if ( ! bring_half_up( intf, &ifr ) )
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558 return false;
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diff changeset
559
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560 *pstate = DHCPSTATE_INIT;
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diff changeset
561 }
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562
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563 s = socket(AF_INET, SOCK_DGRAM, 0);
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564 if (s < 0) {
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jlarmour
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diff changeset
565 perror("socket");
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566 return false;
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diff changeset
567 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
568
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
569 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
570 perror("setsockopt");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
571 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
572 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
573
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
574 memset((char *) &cli_addr, 0, sizeof(cli_addr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
575 cli_addr.sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
576 cli_addr.sin_len = sizeof(cli_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
577 cli_addr.sin_addr.s_addr = htonl(INADDR_ANY);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
578 cli_addr.sin_port = htons(IPPORT_BOOTPC);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
579
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jlarmour
parents:
diff changeset
580 memset((char *) &broadcast_addr, 0, sizeof(broadcast_addr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
581 broadcast_addr.sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
582 broadcast_addr.sin_len = sizeof(broadcast_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
583 broadcast_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
584 broadcast_addr.sin_port = htons(IPPORT_BOOTPS);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
585
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jlarmour
parents:
diff changeset
586 memset((char *) &server_addr, 0, sizeof(server_addr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
587 server_addr.sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
588 server_addr.sin_len = sizeof(server_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
589 server_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST); // overwrite later
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
590 server_addr.sin_port = htons(IPPORT_BOOTPS);
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jlarmour
parents:
diff changeset
591
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jlarmour
parents:
diff changeset
592 if(bind(s, (struct sockaddr *) &cli_addr, sizeof(cli_addr)) < 0) {
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jlarmour
parents:
diff changeset
593 perror("bind error");
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jlarmour
parents:
diff changeset
594 return false;
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jlarmour
parents:
diff changeset
595 }
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jlarmour
parents:
diff changeset
596 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
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jlarmour
parents:
diff changeset
597 perror("setsockopt SO_REUSEADDR");
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jlarmour
parents:
diff changeset
598 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
599 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
600 if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) {
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jlarmour
parents:
diff changeset
601 perror("setsockopt SO_REUSEPORT");
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jlarmour
parents:
diff changeset
602 return false;
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jlarmour
parents:
diff changeset
603 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
604
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
605 // Now, we can launch into the DHCP state machine. I think this will
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
606 // be the neatest way to do it; it returns from within the switch arms
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
607 // when all is well, or utterly failed.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
608
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
609 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
610
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
611 // Choose a new XID: first get the ESA as a basis:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
612 strcpy(&ifr.ifr_name[0], intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
613 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
614 perror("SIOCGIFHWADDR 2");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
615 return false;
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jlarmour
parents:
diff changeset
616 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
617
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
618 // Choose from scratch depending on ifr_hwaddr...[]
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
619 xid = ifr.ifr_hwaddr.sa_data[5];
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
620 xid |= (ifr.ifr_hwaddr.sa_data[4]) << 8;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
621 xid |= (ifr.ifr_hwaddr.sa_data[3]) << 16;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
622 xid |= (ifr.ifr_hwaddr.sa_data[2]) << 24;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
623 xid ^= (cyg_arc4random() & 0xffff0000);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
624
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
625 // Avoid adjacent ESAs colliding by increment
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
626 #define NEW_XID(_xid) CYG_MACRO_START (_xid)+= 0x10000; CYG_MACRO_END
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
627
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
628 while ( 1 ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
629
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jlarmour
parents:
diff changeset
630 // If we are active rather than in the process of shutting down,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
631 // check for any lease expiry every time round, so that alarms
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
632 // *can* change the course of events even when already renewing,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
633 // for example.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
634 if ( DHCPSTATE_DO_RELEASE != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
635 && DHCPSTATE_NOTBOUND != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
636 && DHCPSTATE_FAILED != *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
637 cyg_uint8 lease_state;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
638
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jlarmour
parents:
diff changeset
639 cyg_scheduler_lock();
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jlarmour
parents:
diff changeset
640 lease_state = lease->which;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
641 lease->which = 0; // flag that we have noticed it
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
642 cyg_scheduler_unlock();
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jlarmour
parents:
diff changeset
643
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
644 if ( lease_state & DHCP_LEASE_EX ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
645 // then the lease has expired completely!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
646 *pstate = DHCPSTATE_NOTBOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
647 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
648 else if ( lease_state & DHCP_LEASE_T2 ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
649 // Time to renew
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
650 reset_timeout( &tv, &timeout_scratch ); // next conversation
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
651 *pstate = DHCPSTATE_REBINDING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
652 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
653 else if ( lease_state & DHCP_LEASE_T1 ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
654 // Time to renew
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
655 reset_timeout( &tv, &timeout_scratch ); // next conversation
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
656 *pstate = DHCPSTATE_RENEWING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
657 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
658 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
659
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
660 switch ( *pstate ) {
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jlarmour
parents:
diff changeset
661
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
662 case DHCPSTATE_INIT:
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jlarmour
parents:
diff changeset
663
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
664 // Send the DHCPDISCOVER packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
665
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
666 // Fill in the BOOTP request - DHCPDISCOVER packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
667 bzero(xmit, sizeof(*xmit));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
668 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
669 xmit->bp_htype = HTYPE_ETHERNET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
670 xmit->bp_hlen = IFHWADDRLEN;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
671 xmit->bp_xid = xid;
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jlarmour
parents:
diff changeset
672 xmit->bp_secs = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
673 xmit->bp_flags = htons(0x8000); // BROADCAST FLAG
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
674 bcopy(ifr.ifr_hwaddr.sa_data, &xmit->bp_chaddr, xmit->bp_hlen);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
675 bcopy(mincookie, xmit->bp_vend, sizeof(mincookie));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
676
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
677 // remove the next line to test ability to handle bootp packets.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
678 set_fixed_tag( xmit, TAG_DHCP_MESS_TYPE, DHCPDISCOVER, 1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
679 // Set all the tags we want to use when sending a packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
680 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
681
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
682 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
683 diag_printf( "---------DHCPSTATE_INIT sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
684 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
685 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
686 if(sendto(s, xmit, dhcp_size_for_send(xmit), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
687 (struct sockaddr *)&broadcast_addr, sizeof(broadcast_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
688 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
689 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
690 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
691
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
692 seen_bootp_reply = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
693 *pstate = DHCPSTATE_SELECTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
694 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
695
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
696 case DHCPSTATE_SELECTING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
697 // This is a separate state so that we can listen again
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
698 // *without* retransmitting.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
699
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
700 // listen for the DHCPOFFER reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
701
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
702 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
703
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
704 addrlen = sizeof(rx_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
705 if (recvfrom(s, received, sizeof(struct bootp), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
706 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
707 // No packet arrived (this time)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
708 if ( seen_bootp_reply ) { // then already have a bootp reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
709 // Save the good packet in *xmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
710 bcopy( received, xmit, dhcp_size(received) );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
711 *pstate = DHCPSTATE_BOOTP_FALLBACK;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
712 NEW_XID( xid ); // Happy to advance, so new XID
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
713 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
714 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
715 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
716 // go to the next larger timeout and re-send:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
717 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
718 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
719 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
720 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
721 *pstate = DHCPSTATE_INIT; // to retransmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
722 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
723 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
724
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
725 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
726 diag_printf( "---------DHCPSTATE_SELECTING received:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
727 diag_printf( "...rx_addr is family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
728 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
729 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
730 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
731 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
732 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
733 if ( CHECK_XID() ) // XID and ESA matches?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
734 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
735
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
736 if ( 0 == received->bp_siaddr.s_addr ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
737 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
738 length = sizeof(received->bp_siaddr.s_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
739 get_bootp_option( received, TAG_DHCP_SERVER_ID,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
740 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
741 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
742 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
743
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
744 // see if it was a DHCP reply or a bootp reply; it could be
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
745 // either.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
746 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
747 if ( get_bootp_option( received, TAG_DHCP_MESS_TYPE, &msgtype,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
748 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
749 if ( DHCPOFFER == msgtype ) { // all is well
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
750 // Save the good packet in *xmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
751 bcopy( received, xmit, dhcp_size(received) );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
752 // we like the packet, so reset the timeout for next time
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
753 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
754 *pstate = DHCPSTATE_REQUESTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
755 NEW_XID( xid ); // Happy to advance, so new XID
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
756 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
757 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
758 else // No TAG_DHCP_MESS_TYPE entry so it's a bootp reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
759 seen_bootp_reply = 1; // (keep the bootp packet in received)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
760
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
761 // If none of the above state changes occurred, we got a packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
762 // that "should not happen", OR we have a bootp reply in our
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
763 // hand; so listen again with the same timeout, without
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
764 // retrying the send, in the hope of getting a DHCP reply.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
765 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
766
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
767 case DHCPSTATE_REQUESTING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
768 // Just send what you got with a DHCPREQUEST in the message type.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
769 // then wait for an ACK in DHCPSTATE_REQUEST_RECV.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
770
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
771 // Fill in the BOOTP request - DHCPREQUEST packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
772 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
773 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
774 xmit->bp_flags = htons(0x8000); // BROADCAST FLAG
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
775
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
776 set_fixed_tag( xmit, TAG_DHCP_MESS_TYPE, DHCPREQUEST, 1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
777 // Set all the tags we want to use when sending a packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
778 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
779 // And this will be a new one:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
780 set_fixed_tag( xmit, TAG_DHCP_REQ_IP, ntohl(xmit->bp_yiaddr.s_addr), 4 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
781
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
782 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
783 diag_printf( "---------DHCPSTATE_REQUESTING sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
784 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
785 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
786 if(sendto(s, xmit, dhcp_size_for_send(xmit), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
787 (struct sockaddr *)&broadcast_addr, sizeof(broadcast_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
788 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
789 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
790 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
791
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
792 *pstate = DHCPSTATE_REQUEST_RECV;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
793 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
794
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
795 case DHCPSTATE_REQUEST_RECV:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
796 // wait for an ACK or a NACK - retry by going back to
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
797 // DHCPSTATE_REQUESTING; NACK means go back to INIT.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
798
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
799 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
800
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
801 addrlen = sizeof(rx_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
802 if (recvfrom(s, received, sizeof(struct bootp), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
803 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
804 // No packet arrived
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
805 // go to the next larger timeout and re-send:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
806 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
807 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
808 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
809 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
810 *pstate = DHCPSTATE_REQUESTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
811 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
812 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
813
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
814 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
815 diag_printf( "---------DHCPSTATE_REQUEST_RECV received:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
816 diag_printf( "...rx_addr is family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
817 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
818 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
819 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
820 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
821 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
822 if ( CHECK_XID() ) // not the same transaction;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
823 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
824
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
825 if ( 0 == received->bp_siaddr.s_addr ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
826 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
827 length = sizeof(received->bp_siaddr.s_addr );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
828 get_bootp_option( received, TAG_DHCP_SERVER_ID,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
829 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
830 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
831 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
832
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
833 // check it was a DHCP reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
834 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
835 if ( get_bootp_option( received, TAG_DHCP_MESS_TYPE, &msgtype,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
836 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
837 if ( DHCPACK == msgtype // Same offer & server?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
838 && received->bp_yiaddr.s_addr == xmit->bp_yiaddr.s_addr
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
839 && received->bp_siaddr.s_addr == xmit->bp_siaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
840 // we like the packet, so reset the timeout for next time
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
841 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
842 // Record the new lease and set up timers &c
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
843 new_lease( received, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
844 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
845 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
846 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
847 if ( DHCPNAK == msgtype // Same server?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
848 && received->bp_siaddr.s_addr == xmit->bp_siaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
849 // we're bounced!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
850 *pstate = DHCPSTATE_INIT; // So back the start of the rigmarole.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
851 NEW_XID( xid ); // Unhappy to advance, so new XID
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
852 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
853 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
854 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
855 // otherwise it's something else, maybe another offer, or a bogus
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
856 // NAK from someone we are not asking!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
857 // Just listen again, which implicitly discards it.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
858 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
859 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
860
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
861 case DHCPSTATE_BOUND:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
862
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
863 // We are happy now, we have our address.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
864
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
865 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
866 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
867
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
868 // Re-initialize the interface with the new state
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
869 if ( DHCPSTATE_BOUND != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
870 // Then need to go down and up
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
871 do_dhcp_down_net( intf, res, &oldstate, lease ); // oldstate used
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
872 if ( 0 != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
873 // Then not called from init_all_network_interfaces()
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
874 // so we must initialize the interface ourselves
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
875 if (!init_net(intf, res)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
876 do_dhcp_down_net( intf, res, pstate, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
877 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
878 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
879 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
880 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
881 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
882
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
883 // Otherwise, nothing whatsoever to do...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
884 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
885
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
886 case DHCPSTATE_RENEWING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
887 // Just send what you got with a DHCPREQUEST in the message
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
888 // type UNICAST straight to the server. Then wait for an ACK.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
889
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
890 // Fill in the BOOTP request - DHCPREQUEST packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
891 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
892 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
893 xmit->bp_flags = htons(0); // No BROADCAST FLAG
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
894 // Use the *client* address here:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
895 xmit->bp_ciaddr.s_addr = xmit->bp_yiaddr.s_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
896
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
897 set_fixed_tag( xmit, TAG_DHCP_MESS_TYPE, DHCPREQUEST, 1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
898 // These must not be set in this context
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
899 unset_tag( xmit, TAG_DHCP_REQ_IP );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
900 unset_tag( xmit, TAG_DHCP_SERVER_ID );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
901 // Set all the tags we want to use when sending a packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
902 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
903
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
904 // Set unicast address to *server*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
905 server_addr.sin_addr.s_addr = res->bp_siaddr.s_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
906
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
907 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
908 diag_printf( "---------DHCPSTATE_RENEWING sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
909 diag_printf( "UNICAST to family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
910 server_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
911 server_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
912 server_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
913 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
914 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
915
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
916 if(sendto(s, xmit, dhcp_size_for_send(xmit), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
917 // UNICAST address of the server:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
918 (struct sockaddr *)&server_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
919 sizeof(server_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
920 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
921 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
922 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
923
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
924 *pstate = DHCPSTATE_RENEW_RECV;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
925 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
926
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
927 case DHCPSTATE_RENEW_RECV:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
928 // wait for an ACK or a NACK - retry by going back to
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
929 // DHCPSTATE_RENEWING; NACK means go to NOTBOUND.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
930 // No answer means just wait for T2, to broadcast.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
931
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
932 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
933
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
934 addrlen = sizeof(rx_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
935 if (recvfrom(s, received, sizeof(struct bootp), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
936 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
937 // No packet arrived
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
938 // go to the next larger timeout and re-send:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
939 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
940 // If we timed out completely, just give up until T2
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
941 // expires - retain the lease meanwhile. The normal
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
942 // lease mechanism will invoke REBINDING as and when
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
943 // necessary.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
944 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
945 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
946 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
947 *pstate = DHCPSTATE_RENEWING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
948 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
949 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
950
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
951 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
952 diag_printf( "---------DHCPSTATE_RENEW_RECV received:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
953 diag_printf( "...rx_addr is family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
954 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
955 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
956 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
957 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
958 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
959 if ( CHECK_XID() ) // not the same transaction;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
960 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
961
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
962 if ( 0 == received->bp_siaddr.s_addr ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
963 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
964 length = sizeof(received->bp_siaddr.s_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
965 get_bootp_option( received, TAG_DHCP_SERVER_ID,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
966 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
967 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
968 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
969
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
970 // check it was a DHCP reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
971 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
972 if ( get_bootp_option( received, TAG_DHCP_MESS_TYPE, &msgtype,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
973 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
974 if ( DHCPACK == msgtype // Same offer?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
975 && received->bp_yiaddr.s_addr == xmit->bp_yiaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
976 // we like the packet, so reset the timeout for next time
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
977 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
978 // Record the new lease and set up timers &c
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jlarmour
parents:
diff changeset
979 new_lease( received, lease );
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jlarmour
parents:
diff changeset
980 *pstate = DHCPSTATE_BOUND;
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jlarmour
parents:
diff changeset
981 break;
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jlarmour
parents:
diff changeset
982 }
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jlarmour
parents:
diff changeset
983 if ( DHCPNAK == msgtype ) { // we're bounced!
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jlarmour
parents:
diff changeset
984 *pstate = DHCPSTATE_NOTBOUND; // So quit out.
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jlarmour
parents:
diff changeset
985 break;
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jlarmour
parents:
diff changeset
986 }
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jlarmour
parents:
diff changeset
987 // otherwise it's something else, maybe another offer.
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jlarmour
parents:
diff changeset
988 // Just listen again, which implicitly discards it.
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jlarmour
parents:
diff changeset
989 }
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jlarmour
parents:
diff changeset
990 break;
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jlarmour
parents:
diff changeset
991
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
992 case DHCPSTATE_REBINDING:
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jlarmour
parents:
diff changeset
993 // Just send what you got with a DHCPREQUEST in the message type.
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jlarmour
parents:
diff changeset
994 // Then wait for an ACK. This one is BROADCAST.
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jlarmour
parents:
diff changeset
995
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jlarmour
parents:
diff changeset
996 // Fill in the BOOTP request - DHCPREQUEST packet
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jlarmour
parents:
diff changeset
997 xmit->bp_xid = xid;
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jlarmour
parents:
diff changeset
998 xmit->bp_op = BOOTREQUEST;
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jlarmour
parents:
diff changeset
999 xmit->bp_flags = htons(0); // no BROADCAST FLAG
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jlarmour
parents:
diff changeset
1000 // Use the *client* address here:
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jlarmour
parents:
diff changeset
1001 xmit->bp_ciaddr.s_addr = xmit->bp_yiaddr.s_addr;
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jlarmour
parents:
diff changeset
1002
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jlarmour
parents:
diff changeset
1003 set_fixed_tag( xmit, TAG_DHCP_MESS_TYPE, DHCPREQUEST, 1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1004 // These must not be set in this context
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jlarmour
parents:
diff changeset
1005 unset_tag( xmit, TAG_DHCP_REQ_IP );
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jlarmour
parents:
diff changeset
1006 unset_tag( xmit, TAG_DHCP_SERVER_ID );
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jlarmour
parents:
diff changeset
1007 // Set all the tags we want to use when sending a packet
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jlarmour
parents:
diff changeset
1008 set_default_dhcp_tags( xmit );
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jlarmour
parents:
diff changeset
1009
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jlarmour
parents:
diff changeset
1010 #ifdef CYGDBG_NET_DHCP_CHATTER
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jlarmour
parents:
diff changeset
1011 diag_printf( "---------DHCPSTATE_REBINDING sending:\n" );
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jlarmour
parents:
diff changeset
1012 show_bootp( intf, xmit );
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jlarmour
parents:
diff changeset
1013 #endif
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jlarmour
parents:
diff changeset
1014 if(sendto(s, xmit, dhcp_size_for_send(xmit), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1015 (struct sockaddr *)&broadcast_addr, sizeof(broadcast_addr)) < 0) {
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jlarmour
parents:
diff changeset
1016 *pstate = DHCPSTATE_FAILED;
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jlarmour
parents:
diff changeset
1017 break;
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jlarmour
parents:
diff changeset
1018 }
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jlarmour
parents:
diff changeset
1019
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jlarmour
parents:
diff changeset
1020 *pstate = DHCPSTATE_REBIND_RECV;
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jlarmour
parents:
diff changeset
1021 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1022
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jlarmour
parents:
diff changeset
1023 case DHCPSTATE_REBIND_RECV:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1024 // wait for an ACK or a NACK - retry by going back to
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1025 // DHCPSTATE_REBINDING; NACK means go to NOTBOUND.
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jlarmour
parents:
diff changeset
1026 // No answer means just wait for expiry; we tried!
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jlarmour
parents:
diff changeset
1027
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jlarmour
parents:
diff changeset
1028 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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jlarmour
parents:
diff changeset
1029
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jlarmour
parents:
diff changeset
1030 addrlen = sizeof(rx_addr);
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jlarmour
parents:
diff changeset
1031 if (recvfrom(s, received, sizeof(struct bootp), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1032 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
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jlarmour
parents:
diff changeset
1033 // No packet arrived
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jlarmour
parents:
diff changeset
1034 // go to the next larger timeout and re-send:
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jlarmour
parents:
diff changeset
1035 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
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jlarmour
parents:
diff changeset
1036 // If we timed out completely, just give up until EX
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1037 // expires - retain the lease meanwhile. The normal
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1038 // lease mechanism will invoke NOTBOUND state as and
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1039 // when necessary.
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jlarmour
parents:
diff changeset
1040 *pstate = DHCPSTATE_BOUND;
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jlarmour
parents:
diff changeset
1041 break;
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jlarmour
parents:
diff changeset
1042 }
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jlarmour
parents:
diff changeset
1043 *pstate = DHCPSTATE_REBINDING;
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jlarmour
parents:
diff changeset
1044 break;
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jlarmour
parents:
diff changeset
1045 }
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jlarmour
parents:
diff changeset
1046
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1047 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1048 diag_printf( "---------DHCPSTATE_REBIND_RECV received:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1049 diag_printf( "...rx_addr is family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1050 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1051 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1052 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1053 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1054 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1055 if ( CHECK_XID() ) // not the same transaction;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1056 break; // listen again...
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jlarmour
parents:
diff changeset
1057
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1058 if ( 0 == received->bp_siaddr.s_addr ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1059 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1060 int length = sizeof(received->bp_siaddr.s_addr );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1061 get_bootp_option( received, TAG_DHCP_SERVER_ID,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1062 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1063 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1064 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1065
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1066 // check it was a DHCP reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1067 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1068 if ( get_bootp_option( received, TAG_DHCP_MESS_TYPE, &msgtype,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1069 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1070 if ( DHCPACK == msgtype // Same offer?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1071 && received->bp_yiaddr.s_addr == xmit->bp_yiaddr.s_addr) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1072 // we like the packet, so reset the timeout for next time
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1073 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1074 // Record the new lease and set up timers &c
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1075 new_lease( received, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1076 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1077 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1078 }
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jlarmour
parents:
diff changeset
1079 else if ( DHCPNAK == msgtype ) { // we're bounced!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1080 *pstate = DHCPSTATE_NOTBOUND; // So back the start of the rigmarole.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1081 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1082 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1083 // otherwise it's something else, maybe another offer.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1084 // Just listen again, which implicitly discards it.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1085 }
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jlarmour
parents:
diff changeset
1086 break;
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jlarmour
parents:
diff changeset
1087
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1088 case DHCPSTATE_BOOTP_FALLBACK:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1089 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1090 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1091 // And no lease should have become active, but JIC
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1092 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1093 // Re-initialize the interface with the new state
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1094 if ( DHCPSTATE_BOOTP_FALLBACK != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1095 // Then need to go down and up
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1096 do_dhcp_down_net( intf, res, &oldstate, lease ); // oldstate used
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1097 if ( 0 != oldstate ) {
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jlarmour
parents:
diff changeset
1098 // Then not called from init_all_network_interfaces()
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jlarmour
parents:
diff changeset
1099 // so we must initialize the interface ourselves
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jlarmour
parents:
diff changeset
1100 if (!init_net(intf, res)) {
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jlarmour
parents:
diff changeset
1101 do_dhcp_down_net( intf, res, pstate, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1102 *pstate = DHCPSTATE_FAILED;
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jlarmour
parents:
diff changeset
1103 return false;
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jlarmour
parents:
diff changeset
1104 }
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jlarmour
parents:
diff changeset
1105 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1106 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1107
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1108 // Otherwise, nothing whatsoever to do...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1109 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1110
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jlarmour
parents:
diff changeset
1111 case DHCPSTATE_NOTBOUND:
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jlarmour
parents:
diff changeset
1112 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1113 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1114 // No lease active
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jlarmour
parents:
diff changeset
1115 no_lease( lease );
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jlarmour
parents:
diff changeset
1116 // Leave interface up so app can tidy.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1117 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1118
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jlarmour
parents:
diff changeset
1119 case DHCPSTATE_FAILED:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1120 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1121 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1122 // No lease active
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1123 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1124 // Unconditionally down the interface.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1125 do_dhcp_down_net( intf, res, &oldstate, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1126 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1127
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jlarmour
parents:
diff changeset
1128 case DHCPSTATE_DO_RELEASE:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1129 // We have been forced here by external means, to release the
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1130 // lease for graceful shutdown.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1131
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1132 // Just send what you got with a DHCPRELEASE in the message
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1133 // type UNICAST straight to the server. No ACK. Then go to
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1134 // NOTBOUND state.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1135 NEW_XID( xid );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1136 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1137 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1138 xmit->bp_flags = htons(0); // no BROADCAST FLAG
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1139 // Use the *client* address here:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1140 xmit->bp_ciaddr.s_addr = xmit->bp_yiaddr.s_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1141
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jlarmour
parents:
diff changeset
1142 set_fixed_tag( xmit, TAG_DHCP_MESS_TYPE, DHCPRELEASE, 1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1143
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jlarmour
parents:
diff changeset
1144 // Set unicast address to *server*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1145 server_addr.sin_addr.s_addr = res->bp_siaddr.s_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1146
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jlarmour
parents:
diff changeset
1147 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1148 diag_printf( "---------DHCPSTATE_DO_RELEASE sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1149 diag_printf( "UNICAST to family %d, addr %08x, port %d\n",
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1150 server_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1151 server_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1152 server_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1153 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1154 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1155 if(sendto(s, xmit, dhcp_size_for_send(xmit), 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1156 // UNICAST address of the server:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1157 (struct sockaddr *)&server_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1158 sizeof(server_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1159 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1160 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1161 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1162
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1163 *pstate = DHCPSTATE_NOTBOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1164 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1165
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jlarmour
parents:
diff changeset
1166 default:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1167 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1168 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1169 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1170 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1171 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1172 /* NOTREACHED */
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jlarmour
parents:
diff changeset
1173 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1174 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1175
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1176 // ------------------------------------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1177 // Bring an interface down, failed to initialize it or lease is expired
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1178 // Also part of normal startup, bring down for proper reinitialization
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1179
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1180 int
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1181 do_dhcp_down_net(const char *intf, struct bootp *res,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1182 cyg_uint8 *pstate, struct dhcp_lease *lease)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1183 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1184 struct sockaddr_in *addrp;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1185 struct ifreq ifr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1186 int s;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1187
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1188 // Ensure clean slate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1189 cyg_route_reinit(); // Force any existing routes to be forgotten
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1190
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1191 s = socket(AF_INET, SOCK_DGRAM, 0);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1192 if (s < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1193 perror("socket");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1194 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1195 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1196
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1197 addrp = (struct sockaddr_in *) &ifr.ifr_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1198
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1199 // Remove any existing address
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1200 if ( DHCPSTATE_FAILED == *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1201 || DHCPSTATE_INIT == *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1202 || 0 == *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1203 // it was configured for broadcast only, "half-up"
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1204 memset(addrp, 0, sizeof(*addrp));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1205 addrp->sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1206 addrp->sin_len = sizeof(*addrp);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1207 addrp->sin_port = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1208 addrp->sin_addr.s_addr = INADDR_ANY;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1209 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1210 else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1211 // get the specific address that was used
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1212 strcpy(ifr.ifr_name, intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1213 if (ioctl(s, SIOCGIFADDR, &ifr)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1214 perror("SIOCGIFADDR 1");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1215 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1216 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1217 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1218
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1219 strcpy(ifr.ifr_name, intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1220 if (ioctl(s, SIOCDIFADDR, &ifr)) { /* delete IF addr */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1221 perror("SIOCDIFADDR1");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1222 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1223
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1224 // Shut down interface so it can be reinitialized
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1225 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1226 if (ioctl(s, SIOCSIFFLAGS, &ifr)) { /* set ifnet flags */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1227 perror("SIOCSIFFLAGS down");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1228 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1229 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1230
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1231 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1232 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1233
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1234 if ( 0 != *pstate ) // preserve initial state
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1235 *pstate = DHCPSTATE_INIT;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1236
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1237 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1238 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1239
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1240 // ------------------------------------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1241 // Release (relinquish) a leased address - if we have one - and bring down
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1242 // the interface.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1243 int
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1244 do_dhcp_release(const char *intf, struct bootp *res,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1245 cyg_uint8 *pstate, struct dhcp_lease *lease)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1246 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1247 if ( 0 != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1248 && DHCPSTATE_INIT != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1249 && DHCPSTATE_NOTBOUND != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1250 && DHCPSTATE_FAILED != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1251 && DHCPSTATE_BOOTP_FALLBACK != *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1252 *pstate = DHCPSTATE_DO_RELEASE;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1253 do_dhcp( intf, res, pstate, lease ); // to send the release packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1254 cyg_thread_delay( 100 ); // to let it leave the building
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1255 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1256 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1257 }
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1258
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1259 // ------------------------------------------------------------------------
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1260
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1261 #endif // CYGPKG_NET_DHCP
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1262
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1263 // EOF dhcp_prot.c