1 | /*
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2 | * RADIUS message processing
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3 | * Copyright (c) 2002-2009, 2012, 2014, Jouni Malinen <j@w1.fi>
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4 | *
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5 | * This software may be distributed under the terms of the BSD license.
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6 | * See README for more details.
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7 | */
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8 |
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9 | #ifndef RADIUS_H
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10 | #define RADIUS_H
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11 |
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12 | /* RFC 2865 - RADIUS */
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13 |
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14 | #ifdef _MSC_VER
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15 | #pragma pack(push, 1)
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16 | #endif /* _MSC_VER */
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17 |
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18 | struct radius_hdr {
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19 | u8 code;
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20 | u8 identifier;
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21 | be16 length; /* including this header */
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22 | u8 authenticator[16];
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23 | /* followed by length-20 octets of attributes */
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24 | } STRUCT_PACKED;
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25 |
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26 | enum { RADIUS_CODE_ACCESS_REQUEST = 1,
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27 | RADIUS_CODE_ACCESS_ACCEPT = 2,
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28 | RADIUS_CODE_ACCESS_REJECT = 3,
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29 | RADIUS_CODE_ACCOUNTING_REQUEST = 4,
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30 | RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
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31 | RADIUS_CODE_ACCESS_CHALLENGE = 11,
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32 | RADIUS_CODE_STATUS_SERVER = 12,
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33 | RADIUS_CODE_STATUS_CLIENT = 13,
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34 | RADIUS_CODE_DISCONNECT_REQUEST = 40,
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35 | RADIUS_CODE_DISCONNECT_ACK = 41,
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36 | RADIUS_CODE_DISCONNECT_NAK = 42,
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37 | RADIUS_CODE_COA_REQUEST = 43,
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38 | RADIUS_CODE_COA_ACK = 44,
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39 | RADIUS_CODE_COA_NAK = 45,
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40 | RADIUS_CODE_RESERVED = 255
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41 | };
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42 |
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43 | struct radius_attr_hdr {
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44 | u8 type;
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45 | u8 length; /* including this header */
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46 | /* followed by length-2 octets of attribute value */
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47 | } STRUCT_PACKED;
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48 |
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49 | #define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr))
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50 |
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51 | enum { RADIUS_ATTR_USER_NAME = 1,
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52 | RADIUS_ATTR_USER_PASSWORD = 2,
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53 | RADIUS_ATTR_NAS_IP_ADDRESS = 4,
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54 | RADIUS_ATTR_NAS_PORT = 5,
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55 | RADIUS_ATTR_FRAMED_MTU = 12,
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56 | RADIUS_ATTR_REPLY_MESSAGE = 18,
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57 | RADIUS_ATTR_STATE = 24,
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58 | RADIUS_ATTR_CLASS = 25,
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59 | RADIUS_ATTR_VENDOR_SPECIFIC = 26,
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60 | RADIUS_ATTR_SESSION_TIMEOUT = 27,
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61 | RADIUS_ATTR_IDLE_TIMEOUT = 28,
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62 | RADIUS_ATTR_TERMINATION_ACTION = 29,
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63 | RADIUS_ATTR_CALLED_STATION_ID = 30,
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64 | RADIUS_ATTR_CALLING_STATION_ID = 31,
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65 | RADIUS_ATTR_NAS_IDENTIFIER = 32,
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66 | RADIUS_ATTR_PROXY_STATE = 33,
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67 | RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
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68 | RADIUS_ATTR_ACCT_DELAY_TIME = 41,
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69 | RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
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70 | RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
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71 | RADIUS_ATTR_ACCT_SESSION_ID = 44,
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72 | RADIUS_ATTR_ACCT_AUTHENTIC = 45,
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73 | RADIUS_ATTR_ACCT_SESSION_TIME = 46,
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74 | RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
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75 | RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
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76 | RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
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77 | RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
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78 | RADIUS_ATTR_ACCT_LINK_COUNT = 51,
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79 | RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
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80 | RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
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81 | RADIUS_ATTR_EVENT_TIMESTAMP = 55,
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82 | RADIUS_ATTR_NAS_PORT_TYPE = 61,
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83 | RADIUS_ATTR_TUNNEL_TYPE = 64,
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84 | RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
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85 | RADIUS_ATTR_TUNNEL_PASSWORD = 69,
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86 | RADIUS_ATTR_CONNECT_INFO = 77,
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87 | RADIUS_ATTR_EAP_MESSAGE = 79,
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88 | RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
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89 | RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
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90 | RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
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91 | RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
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92 | RADIUS_ATTR_NAS_IPV6_ADDRESS = 95,
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93 | RADIUS_ATTR_ERROR_CAUSE = 101,
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94 | RADIUS_ATTR_EAP_KEY_NAME = 102,
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95 | };
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96 |
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97 |
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98 | /* Termination-Action */
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99 | #define RADIUS_TERMINATION_ACTION_DEFAULT 0
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100 | #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
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101 |
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102 | /* NAS-Port-Type */
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103 | #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
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104 |
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105 | /* Acct-Status-Type */
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106 | #define RADIUS_ACCT_STATUS_TYPE_START 1
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107 | #define RADIUS_ACCT_STATUS_TYPE_STOP 2
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108 | #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
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109 | #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
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110 | #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
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111 |
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112 | /* Acct-Authentic */
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113 | #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
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114 | #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
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115 | #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
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116 |
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117 | /* Acct-Terminate-Cause */
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118 | #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
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119 | #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
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120 | #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
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121 | #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
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122 | #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
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123 | #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
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124 | #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
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125 | #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
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126 | #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
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127 | #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
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128 | #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
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129 | #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
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130 | #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
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131 | #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
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132 | #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
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133 | #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
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134 | #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
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135 | #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
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136 |
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137 | #define RADIUS_TUNNEL_TAGS 32
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138 |
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139 | /* Tunnel-Type */
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140 | #define RADIUS_TUNNEL_TYPE_PPTP 1
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141 | #define RADIUS_TUNNEL_TYPE_L2TP 3
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142 | #define RADIUS_TUNNEL_TYPE_IPIP 7
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143 | #define RADIUS_TUNNEL_TYPE_GRE 10
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144 | #define RADIUS_TUNNEL_TYPE_VLAN 13
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145 |
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146 | /* Tunnel-Medium-Type */
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147 | #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
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148 | #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
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149 | #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
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150 |
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151 |
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152 | struct radius_attr_vendor {
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153 | u8 vendor_type;
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154 | u8 vendor_length;
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155 | } STRUCT_PACKED;
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156 |
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157 | #define RADIUS_VENDOR_ID_CISCO 9
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158 | #define RADIUS_CISCO_AV_PAIR 1
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159 |
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160 | /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
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161 | #define RADIUS_VENDOR_ID_MICROSOFT 311
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162 |
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163 | enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
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164 | RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
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165 | };
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166 |
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167 |
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168 | /* Hotspot 2.0 - WFA Vendor-specific RADIUS Attributes */
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169 | #define RADIUS_VENDOR_ID_WFA 40808
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170 |
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171 | enum {
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172 | RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION = 1,
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173 | RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION = 2,
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174 | RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION = 3,
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175 | RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ = 4,
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176 | RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL = 5,
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177 | };
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178 |
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179 | #ifdef _MSC_VER
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180 | #pragma pack(pop)
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181 | #endif /* _MSC_VER */
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182 |
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183 | struct radius_ms_mppe_keys {
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184 | u8 *send;
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185 | size_t send_len;
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186 | u8 *recv;
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187 | size_t recv_len;
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188 | };
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189 |
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190 |
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191 | struct radius_msg;
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192 |
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193 | /* Default size to be allocated for new RADIUS messages */
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194 | #define RADIUS_DEFAULT_MSG_SIZE 1024
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195 |
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196 | /* Default size to be allocated for attribute array */
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197 | #define RADIUS_DEFAULT_ATTR_COUNT 16
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198 |
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199 |
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200 | /* MAC address ASCII format for IEEE 802.1X use
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201 | * (draft-congdon-radius-8021x-20.txt) */
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202 | #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
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203 | /* MAC address ASCII format for non-802.1X use */
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204 | #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
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205 |
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206 | struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
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207 | struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
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208 | struct radius_msg * radius_msg_new(u8 code, u8 identifier);
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209 | void radius_msg_free(struct radius_msg *msg);
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210 | void radius_msg_dump(struct radius_msg *msg);
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211 | int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
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212 | size_t secret_len);
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213 | int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
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214 | size_t secret_len, const u8 *req_authenticator);
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215 | int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
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216 | size_t secret_len,
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217 | const struct radius_hdr *req_hdr);
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218 | void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
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219 | size_t secret_len);
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220 | void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
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221 | size_t secret_len,
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222 | const u8 *req_authenticator);
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223 | int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
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224 | size_t secret_len);
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225 | int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
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226 | size_t secret_len);
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227 | struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
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228 | const u8 *data, size_t data_len);
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229 | struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
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230 | int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
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231 | size_t data_len);
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232 | struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
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233 | int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
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234 | size_t secret_len, struct radius_msg *sent_msg,
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235 | int auth);
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236 | int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
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237 | size_t secret_len, const u8 *req_auth);
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238 | int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
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239 | u8 type);
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240 | void radius_msg_make_authenticator(struct radius_msg *msg,
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241 | const u8 *data, size_t len);
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242 | struct radius_ms_mppe_keys *
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243 | radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
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244 | const u8 *secret, size_t secret_len);
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245 | struct radius_ms_mppe_keys *
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246 | radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
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247 | const u8 *secret, size_t secret_len);
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248 | int radius_msg_add_mppe_keys(struct radius_msg *msg,
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249 | const u8 *req_authenticator,
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250 | const u8 *secret, size_t secret_len,
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251 | const u8 *send_key, size_t send_key_len,
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252 | const u8 *recv_key, size_t recv_key_len);
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253 | int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
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254 | size_t len);
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255 | int radius_user_password_hide(struct radius_msg *msg,
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256 | const u8 *data, size_t data_len,
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257 | const u8 *secret, size_t secret_len,
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258 | u8 *buf, size_t buf_len);
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259 | struct radius_attr_hdr *
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260 | radius_msg_add_attr_user_password(struct radius_msg *msg,
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261 | const u8 *data, size_t data_len,
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262 | const u8 *secret, size_t secret_len);
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263 | int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
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264 | int radius_msg_get_vlanid(struct radius_msg *msg);
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265 | char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
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266 | const u8 *secret, size_t secret_len,
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267 | struct radius_msg *sent_msg, size_t n);
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268 |
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269 | static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
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270 | u32 value)
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271 | {
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272 | u32 val = htonl(value);
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273 | return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
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274 | }
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275 |
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276 | static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
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277 | u32 *value)
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278 | {
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279 | u32 val;
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280 | int res;
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281 | res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
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282 | if (res != 4)
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283 | return -1;
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284 |
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285 | *value = ntohl(val);
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286 | return 0;
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287 | }
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288 | int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
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289 | size_t *len, const u8 *start);
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290 | int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
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291 |
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292 |
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293 | struct radius_attr_data {
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294 | u8 *data;
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295 | size_t len;
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296 | };
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297 |
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298 | struct radius_class_data {
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299 | struct radius_attr_data *attr;
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300 | size_t count;
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301 | };
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302 |
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303 | void radius_free_class(struct radius_class_data *c);
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304 | int radius_copy_class(struct radius_class_data *dst,
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305 | const struct radius_class_data *src);
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306 |
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307 | u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
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308 |
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309 | #endif /* RADIUS_H */
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