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-rw-r--r--src/eap_server/eap_server_methods.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/src/eap_server/eap_server_methods.c b/src/eap_server/eap_server_methods.c
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+/*
+ * EAP server method registration
+ * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "eap_i.h"
+#include "eap_methods.h"
+
+
+static struct eap_method *eap_methods;
+
+
+/**
+ * eap_server_get_eap_method - Get EAP method based on type number
+ * @vendor: EAP Vendor-Id (0 = IETF)
+ * @method: EAP type number
+ * Returns: Pointer to EAP method or %NULL if not found
+ */
+const struct eap_method * eap_server_get_eap_method(int vendor, EapType method)
+{
+ struct eap_method *m;
+ for (m = eap_methods; m; m = m->next) {
+ if (m->vendor == vendor && m->method == method)
+ return m;
+ }
+ return NULL;
+}
+
+
+/**
+ * eap_server_get_type - Get EAP type for the given EAP method name
+ * @name: EAP method name, e.g., TLS
+ * @vendor: Buffer for returning EAP Vendor-Id
+ * Returns: EAP method type or %EAP_TYPE_NONE if not found
+ *
+ * This function maps EAP type names into EAP type numbers based on the list of
+ * EAP methods included in the build.
+ */
+EapType eap_server_get_type(const char *name, int *vendor)
+{
+ struct eap_method *m;
+ for (m = eap_methods; m; m = m->next) {
+ if (os_strcmp(m->name, name) == 0) {
+ *vendor = m->vendor;
+ return m->method;
+ }
+ }
+ *vendor = EAP_VENDOR_IETF;
+ return EAP_TYPE_NONE;
+}
+
+
+/**
+ * eap_server_method_alloc - Allocate EAP server method structure
+ * @version: Version of the EAP server method interface (set to
+ * EAP_SERVER_METHOD_INTERFACE_VERSION)
+ * @vendor: EAP Vendor-ID (EAP_VENDOR_*) (0 = IETF)
+ * @method: EAP type number (EAP_TYPE_*)
+ * @name: Name of the method (e.g., "TLS")
+ * Returns: Allocated EAP method structure or %NULL on failure
+ *
+ * The returned structure should be freed with eap_server_method_free() when it
+ * is not needed anymore.
+ */
+struct eap_method * eap_server_method_alloc(int version, int vendor,
+ EapType method, const char *name)
+{
+ struct eap_method *eap;
+ eap = os_zalloc(sizeof(*eap));
+ if (eap == NULL)
+ return NULL;
+ eap->version = version;
+ eap->vendor = vendor;
+ eap->method = method;
+ eap->name = name;
+ return eap;
+}
+
+
+/**
+ * eap_server_method_free - Free EAP server method structure
+ * @method: Method structure allocated with eap_server_method_alloc()
+ */
+void eap_server_method_free(struct eap_method *method)
+{
+ os_free(method);
+}
+
+
+/**
+ * eap_server_method_register - Register an EAP server method
+ * @method: EAP method to register
+ * Returns: 0 on success, -1 on invalid method, or -2 if a matching EAP method
+ * has already been registered
+ *
+ * Each EAP server method needs to call this function to register itself as a
+ * supported EAP method.
+ */
+int eap_server_method_register(struct eap_method *method)
+{
+ struct eap_method *m, *last = NULL;
+
+ if (method == NULL || method->name == NULL ||
+ method->version != EAP_SERVER_METHOD_INTERFACE_VERSION)
+ return -1;
+
+ for (m = eap_methods; m; m = m->next) {
+ if ((m->vendor == method->vendor &&
+ m->method == method->method) ||
+ os_strcmp(m->name, method->name) == 0)
+ return -2;
+ last = m;
+ }
+
+ if (last)
+ last->next = method;
+ else
+ eap_methods = method;
+
+ return 0;
+}
+
+
+/**
+ * eap_server_unregister_methods - Unregister EAP server methods
+ *
+ * This function is called at program termination to unregister all EAP server
+ * methods.
+ */
+void eap_server_unregister_methods(void)
+{
+ struct eap_method *m;
+
+ while (eap_methods) {
+ m = eap_methods;
+ eap_methods = eap_methods->next;
+
+ if (m->free)
+ m->free(m);
+ else
+ eap_server_method_free(m);
+ }
+}
+
+
+/**
+ * eap_server_get_name - Get EAP method name for the given EAP type
+ * @vendor: EAP Vendor-Id (0 = IETF)
+ * @type: EAP method type
+ * Returns: EAP method name, e.g., TLS, or %NULL if not found
+ *
+ * This function maps EAP type numbers into EAP type names based on the list of
+ * EAP methods included in the build.
+ */
+const char * eap_server_get_name(int vendor, EapType type)
+{
+ struct eap_method *m;
+ for (m = eap_methods; m; m = m->next) {
+ if (m->vendor == vendor && m->method == type)
+ return m->name;
+ }
+ return NULL;
+}