1 /* 2 * EAP server method registration 3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "eap_i.h" 13 #include "eap_methods.h" 14 15 16 static struct eap_method *eap_methods; 17 18 19 /** 20 * eap_server_get_eap_method - Get EAP method based on type number 21 * @vendor: EAP Vendor-Id (0 = IETF) 22 * @method: EAP type number 23 * Returns: Pointer to EAP method or %NULL if not found 24 */ 25 const struct eap_method * eap_server_get_eap_method(int vendor, EapType method) 26 { 27 struct eap_method *m; 28 for (m = eap_methods; m; m = m->next) { 29 if (m->vendor == vendor && m->method == method) 30 return m; 31 } 32 return NULL; 33 } 34 35 36 /** 37 * eap_server_get_type - Get EAP type for the given EAP method name 38 * @name: EAP method name, e.g., TLS 39 * @vendor: Buffer for returning EAP Vendor-Id 40 * Returns: EAP method type or %EAP_TYPE_NONE if not found 41 * 42 * This function maps EAP type names into EAP type numbers based on the list of 43 * EAP methods included in the build. 44 */ 45 EapType eap_server_get_type(const char *name, int *vendor) 46 { 47 struct eap_method *m; 48 for (m = eap_methods; m; m = m->next) { 49 if (os_strcmp(m->name, name) == 0) { 50 *vendor = m->vendor; 51 return m->method; 52 } 53 } 54 *vendor = EAP_VENDOR_IETF; 55 return EAP_TYPE_NONE; 56 } 57 58 59 /** 60 * eap_server_method_alloc - Allocate EAP server method structure 61 * @version: Version of the EAP server method interface (set to 62 * EAP_SERVER_METHOD_INTERFACE_VERSION) 63 * @vendor: EAP Vendor-ID (EAP_VENDOR_*) (0 = IETF) 64 * @method: EAP type number (EAP_TYPE_*) 65 * @name: Name of the method (e.g., "TLS") 66 * Returns: Allocated EAP method structure or %NULL on failure 67 * 68 * The returned structure should be freed with eap_server_method_free() when it 69 * is not needed anymore. 70 */ 71 struct eap_method * eap_server_method_alloc(int version, int vendor, 72 EapType method, const char *name) 73 { 74 struct eap_method *eap; 75 eap = os_zalloc(sizeof(*eap)); 76 if (eap == NULL) 77 return NULL; 78 eap->version = version; 79 eap->vendor = vendor; 80 eap->method = method; 81 eap->name = name; 82 return eap; 83 } 84 85 86 /** 87 * eap_server_method_free - Free EAP server method structure 88 * @method: Method structure allocated with eap_server_method_alloc() 89 */ 90 void eap_server_method_free(struct eap_method *method) 91 { 92 os_free(method); 93 } 94 95 96 /** 97 * eap_server_method_register - Register an EAP server method 98 * @method: EAP method to register 99 * Returns: 0 on success, -1 on invalid method, or -2 if a matching EAP method 100 * has already been registered 101 * 102 * Each EAP server method needs to call this function to register itself as a 103 * supported EAP method. 104 */ 105 int eap_server_method_register(struct eap_method *method) 106 { 107 struct eap_method *m, *last = NULL; 108 109 if (method == NULL || method->name == NULL || 110 method->version != EAP_SERVER_METHOD_INTERFACE_VERSION) 111 return -1; 112 113 for (m = eap_methods; m; m = m->next) { 114 if ((m->vendor == method->vendor && 115 m->method == method->method) || 116 os_strcmp(m->name, method->name) == 0) 117 return -2; 118 last = m; 119 } 120 121 if (last) 122 last->next = method; 123 else 124 eap_methods = method; 125 126 return 0; 127 } 128 129 130 /** 131 * eap_server_unregister_methods - Unregister EAP server methods 132 * 133 * This function is called at program termination to unregister all EAP server 134 * methods. 135 */ 136 void eap_server_unregister_methods(void) 137 { 138 struct eap_method *m; 139 140 while (eap_methods) { 141 m = eap_methods; 142 eap_methods = eap_methods->next; 143 144 if (m->free) 145 m->free(m); 146 else 147 eap_server_method_free(m); 148 } 149 } 150 151 152 /** 153 * eap_server_get_name - Get EAP method name for the given EAP type 154 * @vendor: EAP Vendor-Id (0 = IETF) 155 * @type: EAP method type 156 * Returns: EAP method name, e.g., TLS, or "unknown" if not found 157 * 158 * This function maps EAP type numbers into EAP type names based on the list of 159 * EAP methods included in the build. 160 */ 161 const char * eap_server_get_name(int vendor, EapType type) 162 { 163 struct eap_method *m; 164 if (vendor == EAP_VENDOR_IETF && type == EAP_TYPE_EXPANDED) 165 return "expanded"; 166 for (m = eap_methods; m; m = m->next) { 167 if (m->vendor == vendor && m->method == type) 168 return m->name; 169 } 170 return "unknown"; 171 } 172