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annotate packages/net/common/current/src/dhcp_prot.c @ 897:07ad44cfd9a4

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* src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR take if_laddrreq not ifreq. This caused stack corruption.
author asl
date Thu, 03 Apr 2003 14:04:31 +0000
parents 7c34839e7e97
children db3e0a2fda2f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): hmt
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44 // Contributors: gthomas
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45 // Date: 2000-07-01
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46 // Purpose: DHCP support
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47 // Description:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //========================================================================*/
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52
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53 #include <pkgconf/system.h>
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54 #include <pkgconf/net.h>
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55
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56 #ifdef CYGPKG_NET_DHCP
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57
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58 #if 0
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59 #define perror( txt ) // nothing
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60 #endif
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61
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62 #include <network.h>
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63 #include <dhcp.h>
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64 #include <errno.h>
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65
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66 #include <cyg/infra/cyg_ass.h>
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67
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68 #ifdef INET6
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69 #include <net/if_var.h>
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70 #include <netinet6/in6_var.h>
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71 #endif
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72
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73 // ------------------------------------------------------------------------
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74 // Returns a pointer to the end of dhcp message (or NULL if invalid)
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75 // meaning the address of the byte *after* the TAG_END token in the vendor
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76 // data.
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77
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78 static unsigned char *
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79 scan_dhcp_size( struct bootp *ppkt )
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80 {
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81 unsigned char *op;
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82
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83 op = &ppkt->bp_vend[0];
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84 // First check for the cookie!
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85 if ( op[0] != 99 ||
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86 op[1] != 130 ||
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87 op[2] != 83 ||
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88 op[3] != 99 ) {
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89 CYG_FAIL( "Bad DHCP cookie" );
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90 return NULL;
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91 }
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92 op += 4;
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93 while (*op != TAG_END) {
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94 op += *(op+1)+2;
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95 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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96 CYG_FAIL( "Oversize DHCP packet in dhcp_size" );
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97 return NULL;
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98 }
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99 }
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100 // Check op has not gone wild
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101 CYG_ASSERT( op > (unsigned char *)(&ppkt[0]), "op pointer underflow!" );
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102 // Compare op with non-existent "next" struct bootp in the array.
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103 CYG_ASSERT( op < (unsigned char *)(&ppkt[1]), "op pointer overflow!" );
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104 return op + 1; // Address of first invalid byte
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105 }
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106
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107 // ------------------------------------------------------------------------
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108 // Get the actual packet size of an initialized buffer
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109
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110 static int
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111 dhcp_size( struct bootp *ppkt )
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112 {
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113 unsigned char *op;
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114
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115 op = scan_dhcp_size( ppkt );
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116 if ( !op ) return 0;
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117 return (op - (unsigned char *)ppkt);
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118 }
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119
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120
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121 // ------------------------------------------------------------------------
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122 // Get the actual packet size of an initialized buffer
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123 // This will also pad the packet with 0 if length is less
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124 // than BP_STD_TX_MINPKTSZ.
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125
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126 static int
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127 dhcp_size_for_send( struct bootp *ppkt )
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128 {
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129 unsigned char *op;
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130
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131 op = scan_dhcp_size( ppkt );
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132 if ( !op ) return 0; // Better not scribble!
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133 // Zero extra bytes until the packet is large enough.
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134 for ( ; op < (((unsigned char *)ppkt) + BP_STD_TX_MINPKTSZ); op++ )
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135 *op = 0;
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136 return (op - (unsigned char *)ppkt);
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137 }
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138
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139 // ------------------------------------------------------------------------
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140 // Insert/set an option value in an initialized buffer
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141
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142 static int
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143 set_fixed_tag( struct bootp *ppkt,
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144 unsigned char tag,
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145 cyg_uint32 value,
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146 int len)
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147 {
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148 unsigned char *op;
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149
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150 // Initially this will only scan the options field.
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151
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152 op = &ppkt->bp_vend[4];
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153 while (*op != TAG_END) {
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154 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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155 CYG_FAIL( "Oversize DHCP packet in set_fixed_tag" );
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156 return false;
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157 }
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158 if (*op == tag) // Found it...
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159 break;
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160 op += *(op+1)+2;
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161 }
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162
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163 if (*op == tag) { // Found it...
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164 if ( *(op+1) != len ) {
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165 CYG_FAIL( "Wrong size in set_fixed_tag" );
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166 return false; // wrong size
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167 }
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168 }
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169 else { // overwrite the end tag and install a new one
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170 if ( op + len + 2 > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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171 CYG_FAIL( "Oversize DHCP packet in set_fixed_tag append" );
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172 return false;
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173 }
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174 *op = tag;
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175 *(op+1) = len;
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176 *(op + len + 2) = TAG_END;
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177 }
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178 // and insert the value. Net order is BE.
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179 op += len + 2 - 1; // point to end of value
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180 while ( len-- > 0 ) {
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181 *op-- = (unsigned char)(value & 255);
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182 value >>= 8;
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183 }
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184 return true;
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185 }
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186
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187 // Note that this does not permit changing the size of an extant tag.
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188 static int
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189 set_variable_tag( struct bootp *ppkt,
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190 unsigned char tag,
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191 cyg_uint8 *pvalue,
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192 int len)
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193 {
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194 unsigned char *op;
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195
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196 // Initially this will only scan the options field.
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197 op = &ppkt->bp_vend[4];
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198 while (*op != TAG_END) {
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199 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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200 CYG_FAIL( "Oversize DHCP packet in set_variable_tag" );
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201 return false;
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202 }
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203 if (*op == tag) // Found it...
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204 break;
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205 op += *(op+1)+2;
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206 }
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207
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208 if (*op == tag) { // Found it...
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209 if ( *(op+1) != len ) {
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210 CYG_FAIL( "Wrong size in set_variable_tag" );
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211 return false; // wrong size
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212 }
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213 }
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214 else { // overwrite the end tag and install a new one
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215 if ( op + len + 2 > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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216 CYG_FAIL( "Oversize DHCP packet in set_variable_tag append" );
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217 return false;
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218 }
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219 *op = tag;
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220 *(op+1) = len;
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221 *(op + len + 2) = TAG_END;
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222 }
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223 // and insert the value. No order is implied.
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224 op += 2; // point to start of value
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225 while ( len-- > 0 ) {
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226 *op++ = *pvalue++;
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227 }
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228 return true;
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229 }
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230
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231 static int
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232 unset_tag( struct bootp *ppkt,
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233 unsigned char tag )
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234 {
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235 unsigned char *op, *nextp = 0, *killp = 0;
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236
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237 // Initially this will only scan the options field.
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238
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239 op = &ppkt->bp_vend[4];
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240 while (*op != TAG_END) {
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241 if ( op > &ppkt->bp_vend[BP_VEND_LEN-1] ) {
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242 CYG_FAIL( "Oversize DHCP packet in unset_tag" );
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243 return false;
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244 }
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245 if (*op == tag) { // Found it...
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246 killp = op; // item to kill
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247 nextp = op + *(op+1)+2; // next item address
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248 }
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249 op += *(op+1)+2; // scan to the end
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250 }
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251
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252 if ( !killp )
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253 return false;
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254
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255 // Obliterate the found op by copying down: *op is the end.
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256 while( nextp <= op ) // <= to copy the TAG_END too.
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257 *killp++ = *nextp++;
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258
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259 return true;
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260 }
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261
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262 // ------------------------------------------------------------------------
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263 // Bring up an interface enough to broadcast, before we know who we are
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264
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265 static int
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266 bring_half_up(const char *intf, struct ifreq *ifrp )
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267 {
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268 int s;
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269 int one = 1;
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270
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271 struct sockaddr_in *addrp;
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272 struct ecos_rtentry route;
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273
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274 // Ensure clean slate
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275 cyg_route_reinit(); // Force any existing routes to be forgotten
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276
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277 s = socket(AF_INET, SOCK_DGRAM, 0);
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278 if (s < 0) {
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279 perror("socket");
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280 return false;
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281 }
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282
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283 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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284 perror("setsockopt");
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285 return false;
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286 }
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287
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288 addrp = (struct sockaddr_in *) &ifrp->ifr_addr;
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289 memset(addrp, 0, sizeof(*addrp));
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290 addrp->sin_family = AF_INET;
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291 addrp->sin_len = sizeof(*addrp);
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292 addrp->sin_port = 0;
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293 addrp->sin_addr.s_addr = INADDR_ANY;
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294
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295 strcpy(ifrp->ifr_name, intf);
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296 if (ioctl(s, SIOCSIFADDR, ifrp)) { /* set ifnet address */
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297 perror("SIOCSIFADDR");
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298 return false;
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299 }
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300
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301 if (ioctl(s, SIOCSIFNETMASK, ifrp)) { /* set net addr mask */
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302 perror("SIOCSIFNETMASK");
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303 return false;
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304 }
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305
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306 /* the broadcast address is 255.255.255.255 */
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307 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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308 if (ioctl(s, SIOCSIFBRDADDR, ifrp)) { /* set broadcast addr */
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309 perror("SIOCSIFBRDADDR");
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310 return false;
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311 }
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312
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313 ifrp->ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
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314 if (ioctl(s, SIOCSIFFLAGS, ifrp)) { /* set ifnet flags */
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315 perror("SIOCSIFFLAGS up");
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316 return false;
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317 }
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318
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319 if (ioctl(s, SIOCGIFHWADDR, ifrp) < 0) { /* get MAC address */
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320 perror("SIOCGIFHWADDR 1");
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321 return false;
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322 }
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323
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324 // Set up routing
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325 addrp->sin_family = AF_INET;
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326 addrp->sin_port = 0;
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327 addrp->sin_len = sizeof(*addrp); // Size of address
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328
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329 /* the broadcast address is 255.255.255.255 */
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330 memset(&addrp->sin_addr, 255, sizeof(addrp->sin_addr));
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331 memset(&route, 0, sizeof(route));
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332 memcpy(&route.rt_gateway, addrp, sizeof(*addrp));
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333
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334 addrp->sin_addr.s_addr = INADDR_ANY;
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335 memcpy(&route.rt_dst, addrp, sizeof(*addrp));
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336 memcpy(&route.rt_genmask, addrp, sizeof(*addrp));
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337
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338 route.rt_dev = ifrp->ifr_name;
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339 route.rt_flags = RTF_UP|RTF_GATEWAY;
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340 route.rt_metric = 0;
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341
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342 if (ioctl(s, SIOCADDRT, &route)) { /* add route */
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343 if (errno != EEXIST) {
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344 perror("SIOCADDRT 3");
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345 return false;
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346 }
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347 }
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348
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349 close(s);
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350
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351 return true;
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352 }
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353
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354
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355 // ------------------------------------------------------------------------
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356 // DHCP retransmission timeouts and number of tries
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357 //
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358 // To work better with simulated failures (or real ones!) so that the rest
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359 // of the system is tested, rather than DHCP renewal failures pulling
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360 // everything down, we try a little more zealously than the RFC suggests.
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361
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362 static unsigned char timeout_random = 0;
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363
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364 struct timeout_state {
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365 unsigned int secs;
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366 int countdown;
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367 };
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368
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369 static inline void reset_timeout( struct timeval *ptv, struct timeout_state *pstate )
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370 {
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371 timeout_random++;
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372 pstate->countdown = 4; // initial fast retries
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373 pstate->secs = 3 + (timeout_random & 3);
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374 ptv->tv_sec = 0;
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375 ptv->tv_usec = 65536 * (2 + (timeout_random & 3)); // 0.1 - 0.3S, about
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376 }
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377
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378 static inline int next_timeout( struct timeval *ptv, struct timeout_state *pstate )
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379 {
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380 if ( 0 < pstate->countdown-- )
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381 return true;
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382 if ( 0 == ptv->tv_sec )
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383 ptv->tv_sec = pstate->secs;
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384 else {
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385 timeout_random++;
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386 pstate->secs = ptv->tv_sec * 2 - 2 + (timeout_random & 3);
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387 pstate->countdown = 2; // later fast retries
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388 ptv->tv_sec = 0;
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389 }
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390 return pstate->secs < 100; // If longer, too many tries...
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391 }
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392
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393 // ------------------------------------------------------------------------
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394 // Lease expiry and alarms to notify it
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395
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396 static cyg_alarm_t alarm_function;
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397
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398 static void alarm_function(cyg_handle_t alarm, cyg_addrword_t data)
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399 {
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400 struct dhcp_lease *lease = (struct dhcp_lease *)data;
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401 lease->which |= lease->next;
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402 if ( lease->needs_attention )
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403 cyg_semaphore_post( lease->needs_attention );
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404
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405 // Step the lease on into its next state of being alarmed ;-)
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406 if ( lease->next & DHCP_LEASE_EX ) {
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407 cyg_alarm_disable( alarm );
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408 }
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409 else if ( lease->next & DHCP_LEASE_T2 ) {
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410 lease->next = DHCP_LEASE_EX;
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411 cyg_alarm_initialize( lease->alarm, lease->expiry, 0 );
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412 cyg_alarm_enable( lease->alarm );
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413 }
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414 else if ( lease->next & DHCP_LEASE_T1 ) {
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415 lease->next = DHCP_LEASE_T2;
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416 cyg_alarm_initialize( lease->alarm, lease->t2, 0 );
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417 cyg_alarm_enable( lease->alarm );
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418 }
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419 }
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420
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421 static inline void no_lease( struct dhcp_lease *lease )
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422 {
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423 if ( lease->alarm ) {
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424 // Already set: delete this.
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425 cyg_alarm_disable( lease->alarm );
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426 cyg_alarm_delete( lease->alarm );
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427 lease->alarm = 0;
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428 }
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429 }
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diff changeset
430
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431 static inline void new_lease( struct bootp *bootp, struct dhcp_lease *lease )
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432 {
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433 cyg_tick_count_t now = cyg_current_time();
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434 cyg_tick_count_t then;
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435 cyg_uint32 tag = 0;
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436 cyg_uint32 expiry_then;
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437 cyg_resolution_t resolution =
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438 cyg_clock_get_resolution(cyg_real_time_clock());
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439 cyg_handle_t h;
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440 unsigned int length;
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441
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442 // Silence any jabbering from past lease on this interface
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443 no_lease( lease );
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444 lease->which = lease->next = 0;
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445 cyg_clock_to_counter(cyg_real_time_clock(), &h);
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446 cyg_alarm_create( h, alarm_function, (cyg_addrword_t)lease,
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447 &lease->alarm, &lease->alarm_obj );
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448
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449 // extract the lease time and scale it &c to now.
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450 length = sizeof(tag);
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451 if(!get_bootp_option( bootp, TAG_DHCP_LEASE_TIME, &tag ,&length))
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452 tag = 0xffffffff;
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453
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454 if ( 0xffffffff == tag ) {
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455 lease->expiry = 0xffffffffffffffff;
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456 lease->t2 = 0xffffffffffffffff;
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457 lease->t1 = 0xffffffffffffffff;
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458 return; // it's an infinite lease, hurrah!
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459 }
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460
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461 then = (cyg_uint64)(ntohl(tag));
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462 expiry_then = then;
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463
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464 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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465 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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466 lease->expiry = now + then;
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467 length = sizeof(tag);
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468 if (get_bootp_option( bootp, TAG_DHCP_REBIND_TIME, &tag, &length ))
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469 then = (cyg_uint64)(ntohl(tag));
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470 else
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471 then = expiry_then - expiry_then/4;
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472 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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473 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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474 lease->t2 = now + then;
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475
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476 length = sizeof(tag);
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477 if (get_bootp_option( bootp, TAG_DHCP_RENEWAL_TIME, &tag, &length ))
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478 then = (cyg_uint64)(ntohl(tag));
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479 else
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480 then = expiry_then/2;
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481 then *= 1000000000; // into nS - we know there is room in a tick_count_t
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482 then = (then / resolution.dividend) * resolution.divisor; // into system ticks
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483 lease->t1 = now + then;
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484
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485 #if 0 // for testing this mechanism
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486 lease->expiry = now + 5000; // 1000 here makes for failure in the DHCP test
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487 lease->t2 = now + 3500;
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488 lease->t1 = now + 2500;
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489 #endif
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490
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491 #ifdef CYGDBG_NET_DHCP_CHATTER
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492 diag_printf("new_lease:\n");
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493 diag_printf(" expiry = %d\n",lease->expiry);
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494 diag_printf(" t1 = %d\n",lease->t1);
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495 diag_printf(" t2 = %d\n",lease->t2);
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496 #endif
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497
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498 lease->next = DHCP_LEASE_T1;
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499
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500 cyg_alarm_initialize( lease->alarm, lease->t1, 0 );
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501 cyg_alarm_enable( lease->alarm );
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502 }
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503
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504 // ------------------------------------------------------------------------
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505 // Set all the tags we want to use when sending a packet.
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506 // This has expanded to a large, explicit set to interwork better
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507 // with a variety of DHCP servers.
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508
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509 static void set_default_dhcp_tags( struct bootp *xmit )
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510 {
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511 // Explicitly request full set of params that are default for LINUX
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512 // dhcp servers, but not default for others. This is rather arbitrary,
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513 // but it preserves behaviour for people using those servers.
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514 // Perhaps configury of this set will be needed in future?
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515 //
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516 // Here's the set:
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517 static cyg_uint8 req_list[] = {
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518 #ifdef CYGOPT_NET_DHCP_PARM_REQ_LIST_REPLACE
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519 CYGOPT_NET_DHCP_PARM_REQ_LIST_REPLACE ,
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520 #else
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521 TAG_DHCP_SERVER_ID , // DHCP server id: 10.16.19.66
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522 TAG_DHCP_LEASE_TIME , // DHCP time 51: 60
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523 TAG_DHCP_RENEWAL_TIME , // DHCP time 58: 30
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524 TAG_DHCP_REBIND_TIME , // DHCP time 59: 52
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525 TAG_SUBNET_MASK , // subnet mask: 255.255.255.0
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526 TAG_GATEWAY , // gateway: 10.16.19.66
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527 TAG_DOMAIN_SERVER , // domain server: 10.16.19.66
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528 TAG_DOMAIN_NAME , // domain name: hmt10.cambridge.redhat.com
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529 TAG_IP_BROADCAST , // IP broadcast: 10.16.19.255
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530 #endif
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531 #ifdef CYGOPT_NET_DHCP_PARM_REQ_LIST_ADDITIONAL
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532 CYGOPT_NET_DHCP_PARM_REQ_LIST_ADDITIONAL ,
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533 #endif
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534 };
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535
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536 if ( req_list[0] ) // So that one may easily turn it all off by configury
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537 set_variable_tag( xmit, TAG_DHCP_PARM_REQ_LIST,
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538 &req_list[0], sizeof( req_list ) );
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539
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540 // Explicitly specify our max message size.
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541 set_fixed_tag( xmit, TAG_DHCP_MAX_MSGSZ, BP_MINPKTSZ, 2 );
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542 }
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543
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544 // ------------------------------------------------------------------------
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545 // the DHCP state machine - this does all the work
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diff changeset
546
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547 int
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548 do_dhcp(const char *intf, struct bootp *res,
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549 cyg_uint8 *pstate, struct dhcp_lease *lease)
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550 {
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551 struct ifreq ifr;
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552 struct sockaddr_in cli_addr, broadcast_addr, server_addr, rx_addr;
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553 int s, addrlen;
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554 int one = 1;
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555 unsigned char mincookie[] = {99,130,83,99,255} ;
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556 struct timeval tv;
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557 struct timeout_state timeout_scratch;
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558 cyg_uint8 oldstate = *pstate;
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559 cyg_uint8 msgtype = 0, seen_bootp_reply = 0;
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560 unsigned int length;
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561
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562 cyg_uint32 xid;
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563
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564 #define CHECK_XID() ( /* and other details */ \
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565 received->bp_xid != xid || /* not the same transaction */ \
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566 received->bp_htype != xmit->bp_htype || /* not the same ESA type */ \
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diff changeset
567 received->bp_hlen != xmit->bp_hlen || /* not the same length */ \
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
568 bcmp( &received->bp_chaddr, &xmit->bp_chaddr, xmit->bp_hlen ) \
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
569 )
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
570
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
571 // IMPORTANT: xmit is the same as res throughout this; *received is a
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
572 // scratch buffer for reception; its contents are always copied to res
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
573 // when we are happy with them. So we always transmit from the
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
574 // existing state.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
575 struct bootp rx_local;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
576 struct bootp *received = &rx_local;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
577 struct bootp *xmit = res;
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
578 struct bootp xmit2;
216
da643977bd0a Improve DHCP reply handling
gthomas
parents: 211
diff changeset
579 int xlen;
208
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jlarmour
parents:
diff changeset
580
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jlarmour
parents:
diff changeset
581 // First, get a socket on the interface in question. But Zeroth, if
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
582 // needs be, bring it to the half-up broadcast only state if needs be.
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jlarmour
parents:
diff changeset
583
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jlarmour
parents:
diff changeset
584 if ( DHCPSTATE_INIT == oldstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
585 || DHCPSTATE_FAILED == oldstate
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jlarmour
parents:
diff changeset
586 || 0 == oldstate ) {
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jlarmour
parents:
diff changeset
587 // either explicit init state or the beginning of time or retry
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jlarmour
parents:
diff changeset
588 if ( ! bring_half_up( intf, &ifr ) )
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jlarmour
parents:
diff changeset
589 return false;
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jlarmour
parents:
diff changeset
590
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jlarmour
parents:
diff changeset
591 *pstate = DHCPSTATE_INIT;
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jlarmour
parents:
diff changeset
592 }
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jlarmour
parents:
diff changeset
593
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jlarmour
parents:
diff changeset
594 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
595 if (s < 0) {
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jlarmour
parents:
diff changeset
596 perror("socket");
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jlarmour
parents:
diff changeset
597 return false;
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jlarmour
parents:
diff changeset
598 }
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jlarmour
parents:
diff changeset
599
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jlarmour
parents:
diff changeset
600 if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {
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jlarmour
parents:
diff changeset
601 perror("setsockopt");
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jlarmour
parents:
diff changeset
602 return false;
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jlarmour
parents:
diff changeset
603 }
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jlarmour
parents:
diff changeset
604
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jlarmour
parents:
diff changeset
605 memset((char *) &cli_addr, 0, sizeof(cli_addr));
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jlarmour
parents:
diff changeset
606 cli_addr.sin_family = AF_INET;
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jlarmour
parents:
diff changeset
607 cli_addr.sin_len = sizeof(cli_addr);
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jlarmour
parents:
diff changeset
608 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
609 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
610
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jlarmour
parents:
diff changeset
611 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
612 broadcast_addr.sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
613 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
614 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
615 broadcast_addr.sin_port = htons(IPPORT_BOOTPS);
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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 memset((char *) &server_addr, 0, sizeof(server_addr));
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jlarmour
parents:
diff changeset
618 server_addr.sin_family = AF_INET;
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jlarmour
parents:
diff changeset
619 server_addr.sin_len = sizeof(server_addr);
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jlarmour
parents:
diff changeset
620 server_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST); // overwrite later
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jlarmour
parents:
diff changeset
621 server_addr.sin_port = htons(IPPORT_BOOTPS);
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jlarmour
parents:
diff changeset
622
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jlarmour
parents:
diff changeset
623 if(bind(s, (struct sockaddr *) &cli_addr, sizeof(cli_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
624 perror("bind error");
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jlarmour
parents:
diff changeset
625 return false;
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jlarmour
parents:
diff changeset
626 }
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jlarmour
parents:
diff changeset
627 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
628 perror("setsockopt SO_REUSEADDR");
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jlarmour
parents:
diff changeset
629 return false;
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jlarmour
parents:
diff changeset
630 }
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jlarmour
parents:
diff changeset
631 if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one))) {
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jlarmour
parents:
diff changeset
632 perror("setsockopt SO_REUSEPORT");
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jlarmour
parents:
diff changeset
633 return false;
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jlarmour
parents:
diff changeset
634 }
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jlarmour
parents:
diff changeset
635
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jlarmour
parents:
diff changeset
636 // 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
637 // 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
638 // when all is well, or utterly failed.
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jlarmour
parents:
diff changeset
639
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jlarmour
parents:
diff changeset
640 reset_timeout( &tv, &timeout_scratch );
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jlarmour
parents:
diff changeset
641
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
642 // 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
643 strcpy(&ifr.ifr_name[0], intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
644 if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
645 perror("SIOCGIFHWADDR 2");
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jlarmour
parents:
diff changeset
646 return false;
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jlarmour
parents:
diff changeset
647 }
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jlarmour
parents:
diff changeset
648
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
649 // Choose from scratch depending on ifr_hwaddr...[]
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jlarmour
parents:
diff changeset
650 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
651 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
652 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
653 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
654 xid ^= (cyg_arc4random() & 0xffff0000);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
655
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
656 // Avoid adjacent ESAs colliding by increment
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
657 #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
658
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
659 while ( 1 ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
660
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
661 // 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
662 // 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
663 // *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
664 // for example.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
665 if ( DHCPSTATE_DO_RELEASE != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
666 && DHCPSTATE_NOTBOUND != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
667 && DHCPSTATE_FAILED != *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
668 cyg_uint8 lease_state;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
669
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
670 cyg_scheduler_lock();
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jlarmour
parents:
diff changeset
671 lease_state = lease->which;
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jlarmour
parents:
diff changeset
672 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
673 cyg_scheduler_unlock();
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jlarmour
parents:
diff changeset
674
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
675 if ( lease_state & DHCP_LEASE_EX ) {
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jlarmour
parents:
diff changeset
676 // then the lease has expired completely!
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jlarmour
parents:
diff changeset
677 *pstate = DHCPSTATE_NOTBOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
678 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
679 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
680 // Time to renew
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
681 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
682 *pstate = DHCPSTATE_REBINDING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
683 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
684 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
685 // Time to renew
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
686 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
687 *pstate = DHCPSTATE_RENEWING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
688 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
689 }
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 switch ( *pstate ) {
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jlarmour
parents:
diff changeset
692
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
693 case DHCPSTATE_INIT:
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jlarmour
parents:
diff changeset
694
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
695 // Send the DHCPDISCOVER packet
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
696
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
697 // 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
698 bzero(xmit, sizeof(*xmit));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
699 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
700 xmit->bp_htype = HTYPE_ETHERNET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
701 xmit->bp_hlen = IFHWADDRLEN;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
702 xmit->bp_xid = xid;
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jlarmour
parents:
diff changeset
703 xmit->bp_secs = 0;
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jlarmour
parents:
diff changeset
704 xmit->bp_flags = htons(0x8000); // BROADCAST FLAG
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jlarmour
parents:
diff changeset
705 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
706 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
707
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
708 // 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
709 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
710 // 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
711 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
712
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
713 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
714 diag_printf( "---------DHCPSTATE_INIT sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
715 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
716 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
717 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
718 (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
719 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
720 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
721 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
722
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
723 seen_bootp_reply = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
724 *pstate = DHCPSTATE_SELECTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
725 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
726
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
727 case DHCPSTATE_SELECTING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
728 // 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
729 // *without* retransmitting.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
730
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
731 // listen for the DHCPOFFER reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
732
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
733 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
734
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
735 addrlen = sizeof(rx_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
736 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
737 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
738 // No packet arrived (this time)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
739 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
740 // Save the good packet in *xmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
741 bcopy( received, xmit, dhcp_size(received) );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
742 *pstate = DHCPSTATE_BOOTP_FALLBACK;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
743 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
744 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
745 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
746 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
747 // 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
748 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
749 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
750 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
751 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
752 *pstate = DHCPSTATE_INIT; // to retransmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
753 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
754 }
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
755 // Check for well-formed packet with correct termination (not truncated)
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
756 length = dhcp_size( received );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
757 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
758 diag_printf( "---------DHCPSTATE_SELECTING received:\n" );
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
759 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
760 diag_printf( "WARNING! malformed or truncated packet\n" );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
761 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
762 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
763 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
764 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
765 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
766 #endif
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
767 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
768 break;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
769 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
770 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
771
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
772 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
773 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
774 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
775 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
776 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
777 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
778 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
779
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
780 // 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
781 // either.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
782 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
783 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
784 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
785 if ( DHCPOFFER == msgtype ) { // all is well
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
786 // Save the good packet in *xmit
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
787 bcopy( received, xmit, dhcp_size(received) );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
788 // 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
789 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
790 *pstate = DHCPSTATE_REQUESTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
791 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
792 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
793 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
794 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
795 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
796
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
797 // 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
798 // 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
799 // 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
800 // 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
801 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
802
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
803 case DHCPSTATE_REQUESTING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
804 // 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
805 // 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
806
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
807 // 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
808 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
809 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
810 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
811
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
812 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
813 // 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
814 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
815 // 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
816 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
817
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
818 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
819 diag_printf( "---------DHCPSTATE_REQUESTING sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
820 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
821 #endif
211
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
822 // Send back a [modified] copy. Note that some fields are explicitly
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
823 // cleared, as per the RFC. We need the copy because these fields are
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
824 // still useful to us (and currently stored in the 'result' structure)
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
825 xlen = dhcp_size_for_send( xmit );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
826 bcopy( xmit, &xmit2, xlen );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
827 xmit2.bp_yiaddr.s_addr = xmit2.bp_siaddr.s_addr = xmit2.bp_giaddr.s_addr = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
828 xmit2.bp_hops = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
829 if(sendto(s, &xmit2, xlen, 0,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
830 (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
831 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
832 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
833 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
834
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
835 *pstate = DHCPSTATE_REQUEST_RECV;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
836 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
837
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
838 case DHCPSTATE_REQUEST_RECV:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
839 // 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
840 // 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
841
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
842 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
843
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
844 addrlen = sizeof(rx_addr);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
845 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
846 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
847 // No packet arrived
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
848 // 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
849 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
850 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
851 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
852 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
853 *pstate = DHCPSTATE_REQUESTING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
854 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
855 }
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
856 // Check for well-formed packet with correct termination (not truncated)
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
857 length = dhcp_size( received );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
858 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
859 diag_printf( "---------DHCPSTATE_REQUEST_RECV received:\n" );
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
860 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
861 diag_printf( "WARNING! malformed or truncated packet\n" );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
862 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
863 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
864 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
865 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
866 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
867 #endif
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
868 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
869 break;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
870 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
871 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
872
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
873 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
874 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
875 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
876 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
877 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
878 &length);
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 // check it was a DHCP reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
882 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
883 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
884 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
885 if ( DHCPACK == msgtype // Same offer & server?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
886 && 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
887 && 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
888 // 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
889 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
890 // 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
891 new_lease( received, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
892 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
893 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
894 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
895 if ( DHCPNAK == msgtype // Same server?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
896 && 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
897 // we're bounced!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
898 *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
899 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
900 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
901 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
902 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
903 // 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
904 // 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
905 // 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
906 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
907 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
908
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
909 case DHCPSTATE_BOUND:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
910
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
911 // 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
912
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
913 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
914 close(s);
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 // 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
917 if ( DHCPSTATE_BOUND != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
918 // 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
919 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
920 if ( 0 != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
921 // 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
922 // 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
923 if (!init_net(intf, res)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
924 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
925 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
926 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
927 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
928 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
929 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
930
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
931 // Otherwise, nothing whatsoever to do...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
932 return true;
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 case DHCPSTATE_RENEWING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
935 // 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
936 // 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
937
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
938 // 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
939 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
940 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
941 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
942 // Use the *client* address here:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
943 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
944
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
945 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
946 // 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
947 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
948 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
949 // 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
950 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
951
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
952 // Set unicast address to *server*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
953 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
954
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
955 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
956 diag_printf( "---------DHCPSTATE_RENEWING sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
957 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
958 server_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
959 server_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
960 server_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
961 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
962 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
963
211
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
964 // Send back a [modified] copy. Note that some fields are explicitly
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
965 // cleared, as per the RFC. We need the copy because these fields are
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
966 // still useful to us (and currently stored in the 'result' structure)
216
da643977bd0a Improve DHCP reply handling
gthomas
parents: 211
diff changeset
967 xlen = dhcp_size_for_send(xmit);
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
968 bcopy( xmit, &xmit2, xlen );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
969 xmit2.bp_yiaddr.s_addr = xmit2.bp_siaddr.s_addr = xmit2.bp_giaddr.s_addr = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
970 xmit2.bp_hops = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
971 if(sendto(s, &xmit2, xlen, 0,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
972 // UNICAST address of the server:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
973 (struct sockaddr *)&server_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
974 sizeof(server_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
975 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
976 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
977 }
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jlarmour
parents:
diff changeset
978
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jlarmour
parents:
diff changeset
979 *pstate = DHCPSTATE_RENEW_RECV;
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jlarmour
parents:
diff changeset
980 break;
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jlarmour
parents:
diff changeset
981
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jlarmour
parents:
diff changeset
982 case DHCPSTATE_RENEW_RECV:
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jlarmour
parents:
diff changeset
983 // 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
984 // DHCPSTATE_RENEWING; NACK means go to NOTBOUND.
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jlarmour
parents:
diff changeset
985 // No answer means just wait for T2, to broadcast.
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jlarmour
parents:
diff changeset
986
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jlarmour
parents:
diff changeset
987 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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jlarmour
parents:
diff changeset
988
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jlarmour
parents:
diff changeset
989 addrlen = sizeof(rx_addr);
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jlarmour
parents:
diff changeset
990 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
991 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
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jlarmour
parents:
diff changeset
992 // No packet arrived
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jlarmour
parents:
diff changeset
993 // go to the next larger timeout and re-send:
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jlarmour
parents:
diff changeset
994 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
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jlarmour
parents:
diff changeset
995 // If we timed out completely, just give up until T2
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jlarmour
parents:
diff changeset
996 // 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
997 // lease mechanism will invoke REBINDING as and when
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jlarmour
parents:
diff changeset
998 // necessary.
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jlarmour
parents:
diff changeset
999 *pstate = DHCPSTATE_BOUND;
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jlarmour
parents:
diff changeset
1000 break;
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jlarmour
parents:
diff changeset
1001 }
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jlarmour
parents:
diff changeset
1002 *pstate = DHCPSTATE_RENEWING;
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jlarmour
parents:
diff changeset
1003 break;
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jlarmour
parents:
diff changeset
1004 }
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1005 // Check for well-formed packet with correct termination (not truncated)
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1006 length = dhcp_size( received );
208
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jlarmour
parents:
diff changeset
1007 #ifdef CYGDBG_NET_DHCP_CHATTER
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jlarmour
parents:
diff changeset
1008 diag_printf( "---------DHCPSTATE_RENEW_RECV received:\n" );
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1009 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1010 diag_printf( "WARNING! malformed or truncated packet\n" );
208
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jlarmour
parents:
diff changeset
1011 diag_printf( "...rx_addr is family %d, addr %08x, port %d\n",
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jlarmour
parents:
diff changeset
1012 rx_addr.sin_family,
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jlarmour
parents:
diff changeset
1013 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1014 rx_addr.sin_port );
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jlarmour
parents:
diff changeset
1015 show_bootp( intf, received );
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jlarmour
parents:
diff changeset
1016 #endif
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1017 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1018 break;
208
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jlarmour
parents:
diff changeset
1019 if ( CHECK_XID() ) // not the same transaction;
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jlarmour
parents:
diff changeset
1020 break; // listen again...
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jlarmour
parents:
diff changeset
1021
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jlarmour
parents:
diff changeset
1022 if ( 0 == received->bp_siaddr.s_addr ) {
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jlarmour
parents:
diff changeset
1023 // then fill in from the options...
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jlarmour
parents:
diff changeset
1024 length = sizeof(received->bp_siaddr.s_addr);
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jlarmour
parents:
diff changeset
1025 get_bootp_option( received, TAG_DHCP_SERVER_ID,
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jlarmour
parents:
diff changeset
1026 &received->bp_siaddr.s_addr,
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jlarmour
parents:
diff changeset
1027 &length);
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jlarmour
parents:
diff changeset
1028 }
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jlarmour
parents:
diff changeset
1029
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jlarmour
parents:
diff changeset
1030 // check it was a DHCP reply
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jlarmour
parents:
diff changeset
1031 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1032 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
1033 &length) ) {
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jlarmour
parents:
diff changeset
1034 if ( DHCPACK == msgtype // Same offer?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1035 && received->bp_yiaddr.s_addr == xmit->bp_yiaddr.s_addr) {
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jlarmour
parents:
diff changeset
1036 // we like the packet, so reset the timeout for next time
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jlarmour
parents:
diff changeset
1037 reset_timeout( &tv, &timeout_scratch );
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jlarmour
parents:
diff changeset
1038 // Record the new lease and set up timers &c
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jlarmour
parents:
diff changeset
1039 new_lease( received, lease );
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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 if ( DHCPNAK == msgtype ) { // we're bounced!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1044 *pstate = DHCPSTATE_NOTBOUND; // So quit out.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1045 break;
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jlarmour
parents:
diff changeset
1046 }
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jlarmour
parents:
diff changeset
1047 // otherwise it's something else, maybe another offer.
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jlarmour
parents:
diff changeset
1048 // Just listen again, which implicitly discards it.
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jlarmour
parents:
diff changeset
1049 }
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jlarmour
parents:
diff changeset
1050 break;
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jlarmour
parents:
diff changeset
1051
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jlarmour
parents:
diff changeset
1052 case DHCPSTATE_REBINDING:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1053 // 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
1054 // Then wait for an ACK. This one is BROADCAST.
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jlarmour
parents:
diff changeset
1055
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jlarmour
parents:
diff changeset
1056 // 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
1057 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1058 xmit->bp_op = BOOTREQUEST;
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jlarmour
parents:
diff changeset
1059 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
1060 // Use the *client* address here:
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jlarmour
parents:
diff changeset
1061 xmit->bp_ciaddr.s_addr = xmit->bp_yiaddr.s_addr;
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jlarmour
parents:
diff changeset
1062
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jlarmour
parents:
diff changeset
1063 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
1064 // These must not be set in this context
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jlarmour
parents:
diff changeset
1065 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
1066 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
1067 // 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
1068 set_default_dhcp_tags( xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1069
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1070 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1071 diag_printf( "---------DHCPSTATE_REBINDING sending:\n" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1072 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1073 #endif
211
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1074 // Send back a [modified] copy. Note that some fields are explicitly
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1075 // cleared, as per the RFC. We need the copy because these fields are
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1076 // still useful to us (and currently stored in the 'result' structure)
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1077 xlen = dhcp_size_for_send( xmit );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1078 bcopy( xmit, &xmit2, xlen );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1079 xmit2.bp_yiaddr.s_addr = xmit2.bp_siaddr.s_addr = xmit2.bp_giaddr.s_addr = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1080 xmit2.bp_hops = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1081 if(sendto(s, &xmit2, xlen, 0,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1082 (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
1083 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1084 break;
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
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jlarmour
parents:
diff changeset
1087 *pstate = DHCPSTATE_REBIND_RECV;
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jlarmour
parents:
diff changeset
1088 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1089
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1090 case DHCPSTATE_REBIND_RECV:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1091 // 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
1092 // DHCPSTATE_REBINDING; NACK means go to NOTBOUND.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1093 // No answer means just wait for expiry; we tried!
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1094
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1095 setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
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jlarmour
parents:
diff changeset
1096
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jlarmour
parents:
diff changeset
1097 addrlen = sizeof(rx_addr);
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jlarmour
parents:
diff changeset
1098 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
1099 (struct sockaddr *)&rx_addr, &addrlen) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1100 // No packet arrived
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1101 // 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
1102 if ( ! next_timeout( &tv, &timeout_scratch ) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1103 // 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
1104 // 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
1105 // 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
1106 // when necessary.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1107 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1108 break;
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jlarmour
parents:
diff changeset
1109 }
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jlarmour
parents:
diff changeset
1110 *pstate = DHCPSTATE_REBINDING;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1111 break;
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jlarmour
parents:
diff changeset
1112 }
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1113 // Check for well-formed packet with correct termination (not truncated)
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1114 length = dhcp_size( received );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1115 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1116 diag_printf( "---------DHCPSTATE_REBIND_RECV received:\n" );
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1117 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1118 diag_printf( "WARNING! malformed or truncated packet\n" );
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1119 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
1120 rx_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1121 rx_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1122 rx_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1123 show_bootp( intf, received );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1124 #endif
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1125 if ( length <= 0 )
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1126 break;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1127 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
1128 break; // listen again...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1129
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1130 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
1131 // then fill in from the options...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1132 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
1133 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
1134 &received->bp_siaddr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1135 &length);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1136 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1137
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1138 // check it was a DHCP reply
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1139 length = sizeof(msgtype);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1140 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
1141 &length) ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1142 if ( DHCPACK == msgtype // Same offer?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1143 && 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
1144 // 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
1145 reset_timeout( &tv, &timeout_scratch );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1146 // 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
1147 new_lease( received, lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1148 *pstate = DHCPSTATE_BOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1149 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1150 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1151 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
1152 *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
1153 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1154 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1155 // 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
1156 // 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
1157 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1158 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1159
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1160 case DHCPSTATE_BOOTP_FALLBACK:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1161 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1162 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1163 // 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
1164 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1165 // 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
1166 if ( DHCPSTATE_BOOTP_FALLBACK != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1167 // 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
1168 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
1169 if ( 0 != oldstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1170 // 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
1171 // 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
1172 if (!init_net(intf, res)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1173 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
1174 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1175 return false;
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 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1178 }
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 // Otherwise, nothing whatsoever to do...
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1181 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1182
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1183 case DHCPSTATE_NOTBOUND:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1184 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1185 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1186 // No lease active
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1187 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1188 // 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
1189 return false;
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 case DHCPSTATE_FAILED:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1192 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1193 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1194 // No lease active
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1195 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1196 // Unconditionally down the interface.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1197 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
1198 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1199
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1200 case DHCPSTATE_DO_RELEASE:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1201 // 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
1202 // lease for graceful shutdown.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1203
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1204 // 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
1205 // 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
1206 // NOTBOUND state.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1207 NEW_XID( xid );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1208 xmit->bp_xid = xid;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1209 xmit->bp_op = BOOTREQUEST;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1210 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
1211 // Use the *client* address here:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1212 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
1213
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1214 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
1215
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1216 // Set unicast address to *server*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1217 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
1218
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1219 #ifdef CYGDBG_NET_DHCP_CHATTER
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1220 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
1221 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
1222 server_addr.sin_family,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1223 server_addr.sin_addr.s_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1224 server_addr.sin_port );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1225 show_bootp( intf, xmit );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1226 #endif
211
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1227 // Send back a [modified] copy. Note that some fields are explicitly
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1228 // cleared, as per the RFC. We need the copy because these fields are
6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST
jlarmour
parents: 208
diff changeset
1229 // still useful to us (and currently stored in the 'result' structure)
229
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1230 xlen = dhcp_size_for_send( xmit );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1231 bcopy( xmit, &xmit2, xlen );
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1232 xmit2.bp_yiaddr.s_addr = xmit2.bp_siaddr.s_addr = xmit2.bp_giaddr.s_addr = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1233 xmit2.bp_hops = 0;
ff3465255c3a * src/dhcp_prot.c (_dhcp_copy): Remove. Unnecessary as we can never
jlarmour
parents: 216
diff changeset
1234 if(sendto(s, &xmit2, xlen, 0,
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1235 // UNICAST address of the server:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1236 (struct sockaddr *)&server_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1237 sizeof(server_addr)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1238 *pstate = DHCPSTATE_FAILED;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1239 break;
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
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1242 *pstate = DHCPSTATE_NOTBOUND;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1243 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1244
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1245 default:
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1246 no_lease( lease );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1247 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1248 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1249 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1250 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1251 /* NOTREACHED */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1252 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1253 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1254
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 // 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
1257 // 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
1258
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1259 int
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1260 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
1261 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
1262 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1263 struct sockaddr_in *addrp;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1264 struct ifreq ifr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1265 int s;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1266
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1267 // Ensure clean slate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1268 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
1269
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1270 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
1271 if (s < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1272 perror("socket");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1273 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1274 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1275
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1276 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
1277
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1278 // Remove any existing address
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1279 if ( DHCPSTATE_FAILED == *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1280 || DHCPSTATE_INIT == *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1281 || 0 == *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1282 // 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
1283 memset(addrp, 0, sizeof(*addrp));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1284 addrp->sin_family = AF_INET;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1285 addrp->sin_len = sizeof(*addrp);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1286 addrp->sin_port = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1287 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
1288 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1289 else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1290 // 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
1291 strcpy(ifr.ifr_name, intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1292 if (ioctl(s, SIOCGIFADDR, &ifr)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1293 perror("SIOCGIFADDR 1");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1294 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1295 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1296 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1297
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1298 strcpy(ifr.ifr_name, intf);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1299 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
1300 perror("SIOCDIFADDR1");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1301 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1302
253
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1303 #ifdef INET6
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1304 {
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1305 int s6;
897
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1306 struct if_laddrreq iflr;
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1307
253
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1308 s6 = socket(AF_INET6, SOCK_DGRAM, 0);
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1309 if (s6 < 0) {
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1310 perror("socket AF_INET6");
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1311 return false;
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1312 }
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1313 // Now delete the ipv6 addr
897
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1314 strcpy(iflr.iflr_name, intf);
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1315 if (ioctl(s6, SIOCGLIFADDR, &iflr)) {
253
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1316 perror("SIOCGIFADDR_IN6 1");
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1317 return false;
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1318 }
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1319
897
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1320 strcpy(iflr.iflr_name, intf);
07ad44cfd9a4 * src/dhcp_prot.c (do_dhcp_down_net): SIOCGLIFADDR and SIOCDLIFADDR
asl
parents: 490
diff changeset
1321 if (ioctl(s6, SIOCDLIFADDR, &iflr)) { /* delete IF addr */
253
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1322 perror("SIOCDIFADDR_IN61");
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1323 }
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1324 close(s6);
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1325 }
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1326 #endif /* IP6 */
d364b93024e5 From Red Hat - fix problem with IPv6 when using DHCP.
gthomas
parents: 235
diff changeset
1327
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1328 // 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
1329 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
1330 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
1331 perror("SIOCSIFFLAGS down");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1332 return false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1333 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1334
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1335 // All done with socket
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1336 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1337
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1338 if ( 0 != *pstate ) // preserve initial state
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1339 *pstate = DHCPSTATE_INIT;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1340
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1341 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1342 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1343
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1344 // ------------------------------------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1345 // 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
1346 // the interface.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1347 int
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1348 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
1349 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
1350 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1351 if ( 0 != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1352 && DHCPSTATE_INIT != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1353 && DHCPSTATE_NOTBOUND != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1354 && DHCPSTATE_FAILED != *pstate
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1355 && DHCPSTATE_BOOTP_FALLBACK != *pstate ) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1356 *pstate = DHCPSTATE_DO_RELEASE;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1357 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
1358 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
1359 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1360 return true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1361 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1362
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1363 // ------------------------------------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1364
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1365 #endif // CYGPKG_NET_DHCP
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1366
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
1367 // EOF dhcp_prot.c