Annotation of embedaddon/strongswan/src/libcharon/sa/xauth/xauth_manager.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011 Martin Willi
! 3: * Copyright (C) 2011 revosec AG
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #define _GNU_SOURCE /* for stdndup() */
! 17: #include <string.h>
! 18:
! 19: #include "xauth_manager.h"
! 20:
! 21: #include <collections/linked_list.h>
! 22: #include <threading/rwlock.h>
! 23:
! 24: typedef struct private_xauth_manager_t private_xauth_manager_t;
! 25: typedef struct xauth_entry_t xauth_entry_t;
! 26:
! 27: /**
! 28: * XAuth constructor entry
! 29: */
! 30: struct xauth_entry_t {
! 31:
! 32: /**
! 33: * Xauth backend name
! 34: */
! 35: char *name;
! 36:
! 37: /**
! 38: * Role of the method, XAUTH_SERVER or XAUTH_PEER
! 39: */
! 40: xauth_role_t role;
! 41:
! 42: /**
! 43: * constructor function to create instance
! 44: */
! 45: xauth_constructor_t constructor;
! 46: };
! 47:
! 48: /**
! 49: * private data of xauth_manager
! 50: */
! 51: struct private_xauth_manager_t {
! 52:
! 53: /**
! 54: * public functions
! 55: */
! 56: xauth_manager_t public;
! 57:
! 58: /**
! 59: * list of eap_entry_t's
! 60: */
! 61: linked_list_t *methods;
! 62:
! 63: /**
! 64: * rwlock to lock methods
! 65: */
! 66: rwlock_t *lock;
! 67: };
! 68:
! 69: METHOD(xauth_manager_t, add_method, void,
! 70: private_xauth_manager_t *this, char *name, xauth_role_t role,
! 71: xauth_constructor_t constructor)
! 72: {
! 73: xauth_entry_t *entry;
! 74:
! 75: INIT(entry,
! 76: .name = name,
! 77: .role = role,
! 78: .constructor = constructor,
! 79: );
! 80:
! 81: this->lock->write_lock(this->lock);
! 82: this->methods->insert_last(this->methods, entry);
! 83: this->lock->unlock(this->lock);
! 84: }
! 85:
! 86: METHOD(xauth_manager_t, remove_method, void,
! 87: private_xauth_manager_t *this, xauth_constructor_t constructor)
! 88: {
! 89: enumerator_t *enumerator;
! 90: xauth_entry_t *entry;
! 91:
! 92: this->lock->write_lock(this->lock);
! 93: enumerator = this->methods->create_enumerator(this->methods);
! 94: while (enumerator->enumerate(enumerator, &entry))
! 95: {
! 96: if (constructor == entry->constructor)
! 97: {
! 98: this->methods->remove_at(this->methods, enumerator);
! 99: free(entry);
! 100: }
! 101: }
! 102: enumerator->destroy(enumerator);
! 103: this->lock->unlock(this->lock);
! 104: }
! 105:
! 106: METHOD(xauth_manager_t, create_instance, xauth_method_t*,
! 107: private_xauth_manager_t *this, char *name, xauth_role_t role,
! 108: identification_t *server, identification_t *peer)
! 109: {
! 110: enumerator_t *enumerator;
! 111: xauth_entry_t *entry;
! 112: xauth_method_t *method = NULL;
! 113: char *profile = NULL;
! 114:
! 115: if (name)
! 116: {
! 117: profile = strchr(name, ':');
! 118: if (profile)
! 119: {
! 120: name = strndup(name, profile - name);
! 121: profile++;
! 122: }
! 123: }
! 124:
! 125: this->lock->read_lock(this->lock);
! 126: enumerator = this->methods->create_enumerator(this->methods);
! 127: while (enumerator->enumerate(enumerator, &entry))
! 128: {
! 129: if (!name && streq(entry->name, "noauth"))
! 130: { /* xauth-noauth has to be configured explicitly */
! 131: continue;
! 132: }
! 133: if (role == entry->role && (!name || streq(name, entry->name)))
! 134: {
! 135: method = entry->constructor(server, peer, profile);
! 136: if (method)
! 137: {
! 138: break;
! 139: }
! 140: }
! 141: }
! 142: enumerator->destroy(enumerator);
! 143: this->lock->unlock(this->lock);
! 144: if (profile)
! 145: {
! 146: free(name);
! 147: }
! 148: return method;
! 149: }
! 150:
! 151: METHOD(xauth_manager_t, destroy, void,
! 152: private_xauth_manager_t *this)
! 153: {
! 154: this->methods->destroy_function(this->methods, free);
! 155: this->lock->destroy(this->lock);
! 156: free(this);
! 157: }
! 158:
! 159: /*
! 160: * See header
! 161: */
! 162: xauth_manager_t *xauth_manager_create()
! 163: {
! 164: private_xauth_manager_t *this;
! 165:
! 166: INIT(this,
! 167: .public = {
! 168: .add_method = _add_method,
! 169: .remove_method = _remove_method,
! 170: .create_instance = _create_instance,
! 171: .destroy = _destroy,
! 172: },
! 173: .methods = linked_list_create(),
! 174: .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
! 175: );
! 176:
! 177: return &this->public;
! 178: }
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