2 * EAP peer: Method registration
3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
16 #ifdef CONFIG_DYNAMIC_EAP_METHODS
18 #endif /* CONFIG_DYNAMIC_EAP_METHODS */
22 #include "eap_methods.h"
25 static struct eap_method *eap_methods = NULL;
29 * eap_peer_get_eap_method - Get EAP method based on type number
30 * @vendor: EAP Vendor-Id (0 = IETF)
31 * @method: EAP type number
32 * Returns: Pointer to EAP method or %NULL if not found
34 const struct eap_method * eap_peer_get_eap_method(int vendor, EapType method)
37 for (m = eap_methods; m; m = m->next) {
38 if (m->vendor == vendor && m->method == method)
46 * eap_peer_get_type - Get EAP type for the given EAP method name
47 * @name: EAP method name, e.g., TLS
48 * @vendor: Buffer for returning EAP Vendor-Id
49 * Returns: EAP method type or %EAP_TYPE_NONE if not found
51 * This function maps EAP type names into EAP type numbers based on the list of
52 * EAP methods included in the build.
54 EapType eap_peer_get_type(const char *name, int *vendor)
57 for (m = eap_methods; m; m = m->next) {
58 if (os_strcmp(m->name, name) == 0) {
63 *vendor = EAP_VENDOR_IETF;
69 * eap_get_name - Get EAP method name for the given EAP type
70 * @vendor: EAP Vendor-Id (0 = IETF)
71 * @type: EAP method type
72 * Returns: EAP method name, e.g., TLS, or %NULL if not found
74 * This function maps EAP type numbers into EAP type names based on the list of
75 * EAP methods included in the build.
77 const char * eap_get_name(int vendor, EapType type)
80 if (vendor == EAP_VENDOR_IETF && type == EAP_TYPE_EXPANDED)
82 for (m = eap_methods; m; m = m->next) {
83 if (m->vendor == vendor && m->method == type)
91 * eap_get_names - Get space separated list of names for supported EAP methods
92 * @buf: Buffer for names
93 * @buflen: Buffer length
94 * Returns: Number of characters written into buf (not including nul
97 size_t eap_get_names(char *buf, size_t buflen)
100 struct eap_method *m;
109 for (m = eap_methods; m; m = m->next) {
110 ret = os_snprintf(pos, end - pos, "%s%s",
111 m == eap_methods ? "" : " ", m->name);
112 if (ret < 0 || ret >= end - pos)
116 buf[buflen - 1] = '\0';
123 * eap_get_names_as_string_array - Get supported EAP methods as string array
124 * @num: Buffer for returning the number of items in array, not including %NULL
125 * terminator. This parameter can be %NULL if the length is not needed.
126 * Returns: A %NULL-terminated array of strings, or %NULL on error.
128 * This function returns the list of names for all supported EAP methods as an
129 * array of strings. The caller must free the returned array items and the
132 char ** eap_get_names_as_string_array(size_t *num)
134 struct eap_method *m;
135 size_t array_len = 0;
139 for (m = eap_methods; m; m = m->next)
142 array = os_zalloc(sizeof(char *) * (array_len + 1));
146 for (m = eap_methods; m; m = m->next) {
147 array[i++] = os_strdup(m->name);
148 if (array[i - 1] == NULL) {
149 for (j = 0; j < i; j++)
165 * eap_peer_get_methods - Get a list of enabled EAP peer methods
166 * @count: Set to number of available methods
167 * Returns: List of enabled EAP peer methods
169 const struct eap_method * eap_peer_get_methods(size_t *count)
172 struct eap_method *m;
174 for (m = eap_methods; m; m = m->next)
182 #ifdef CONFIG_DYNAMIC_EAP_METHODS
184 * eap_peer_method_load - Load a dynamic EAP method library (shared object)
185 * @so: File path for the shared object file to load
186 * Returns: 0 on success, -1 on failure
188 int eap_peer_method_load(const char *so)
191 int (*dyn_init)(void);
194 handle = dlopen(so, RTLD_LAZY);
195 if (handle == NULL) {
196 wpa_printf(MSG_ERROR, "EAP: Failed to open dynamic EAP method "
197 "'%s': %s", so, dlerror());
201 dyn_init = dlsym(handle, "eap_peer_method_dynamic_init");
202 if (dyn_init == NULL) {
204 wpa_printf(MSG_ERROR, "EAP: Invalid EAP method '%s' - no "
205 "eap_peer_method_dynamic_init()", so);
212 wpa_printf(MSG_ERROR, "EAP: Failed to add EAP method '%s' - "
217 /* Store the handle for this shared object. It will be freed with
218 * dlclose() when the EAP method is unregistered. */
219 eap_methods->dl_handle = handle;
221 wpa_printf(MSG_DEBUG, "EAP: Loaded dynamic EAP method: '%s'", so);
228 * eap_peer_method_unload - Unload a dynamic EAP method library (shared object)
229 * @method: Pointer to the dynamically loaded EAP method
230 * Returns: 0 on success, -1 on failure
232 * This function can be used to unload EAP methods that have been previously
233 * loaded with eap_peer_method_load(). Before unloading the method, all
234 * references to the method must be removed to make sure that no dereferences
235 * of freed memory will occur after unloading.
237 int eap_peer_method_unload(struct eap_method *method)
239 struct eap_method *m, *prev;
251 if (m == NULL || m->dl_handle == NULL)
255 prev->next = m->next;
257 eap_methods = m->next;
259 handle = m->dl_handle;
264 eap_peer_method_free(m);
270 #endif /* CONFIG_DYNAMIC_EAP_METHODS */
274 * eap_peer_method_alloc - Allocate EAP peer method structure
275 * @version: Version of the EAP peer method interface (set to
276 * EAP_PEER_METHOD_INTERFACE_VERSION)
277 * @vendor: EAP Vendor-ID (EAP_VENDOR_*) (0 = IETF)
278 * @method: EAP type number (EAP_TYPE_*)
279 * @name: Name of the method (e.g., "TLS")
280 * Returns: Allocated EAP method structure or %NULL on failure
282 * The returned structure should be freed with eap_peer_method_free() when it
283 * is not needed anymore.
285 struct eap_method * eap_peer_method_alloc(int version, int vendor,
286 EapType method, const char *name)
288 struct eap_method *eap;
289 eap = os_zalloc(sizeof(*eap));
292 eap->version = version;
293 eap->vendor = vendor;
294 eap->method = method;
301 * eap_peer_method_free - Free EAP peer method structure
302 * @method: Method structure allocated with eap_peer_method_alloc()
304 void eap_peer_method_free(struct eap_method *method)
311 * eap_peer_method_register - Register an EAP peer method
312 * @method: EAP method to register
313 * Returns: 0 on success, -1 on invalid method, or -2 if a matching EAP method
314 * has already been registered
316 * Each EAP peer method needs to call this function to register itself as a
317 * supported EAP method.
319 int eap_peer_method_register(struct eap_method *method)
321 struct eap_method *m, *last = NULL;
323 if (method == NULL || method->name == NULL ||
324 method->version != EAP_PEER_METHOD_INTERFACE_VERSION)
327 for (m = eap_methods; m; m = m->next) {
328 if ((m->vendor == method->vendor &&
329 m->method == method->method) ||
330 os_strcmp(m->name, method->name) == 0)
338 eap_methods = method;
345 * eap_peer_unregister_methods - Unregister EAP peer methods
347 * This function is called at program termination to unregister all EAP peer
350 void eap_peer_unregister_methods(void)
352 struct eap_method *m;
353 #ifdef CONFIG_DYNAMIC_EAP_METHODS
355 #endif /* CONFIG_DYNAMIC_EAP_METHODS */
357 while (eap_methods) {
359 eap_methods = eap_methods->next;
361 #ifdef CONFIG_DYNAMIC_EAP_METHODS
362 handle = m->dl_handle;
363 #endif /* CONFIG_DYNAMIC_EAP_METHODS */
368 eap_peer_method_free(m);
370 #ifdef CONFIG_DYNAMIC_EAP_METHODS
373 #endif /* CONFIG_DYNAMIC_EAP_METHODS */