6cda0dd25d4b27bb9fc2695a074ab13753d98435
[strongswan.git] / src / libcharon / sa / tasks / ike_reauth.c
1 /*
2 * Copyright (C) 2006-2008 Martin Willi
3 * Hochschule fuer Technik Rapperswil
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 #include "ike_reauth.h"
17
18 #include <daemon.h>
19 #include <sa/tasks/ike_delete.h>
20
21
22 typedef struct private_ike_reauth_t private_ike_reauth_t;
23
24 /**
25 * Private members of a ike_reauth_t task.
26 */
27 struct private_ike_reauth_t {
28
29 /**
30 * Public methods and task_t interface.
31 */
32 ike_reauth_t public;
33
34 /**
35 * Assigned IKE_SA.
36 */
37 ike_sa_t *ike_sa;
38
39 /**
40 * reused ike_delete task
41 */
42 ike_delete_t *ike_delete;
43 };
44
45 METHOD(task_t, build_i, status_t,
46 private_ike_reauth_t *this, message_t *message)
47 {
48 return this->ike_delete->task.build(&this->ike_delete->task, message);
49 }
50
51 METHOD(task_t, process_i, status_t,
52 private_ike_reauth_t *this, message_t *message)
53 {
54 ike_sa_t *new;
55 host_t *host;
56 enumerator_t *enumerator;
57 child_sa_t *child_sa;
58 peer_cfg_t *peer_cfg;
59
60 /* process delete response first */
61 this->ike_delete->task.process(&this->ike_delete->task, message);
62
63 peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
64
65 /* reauthenticate only if we have children */
66 if (this->ike_sa->get_child_count(this->ike_sa) == 0
67 #ifdef ME
68 /* we allow peers to reauth mediation connections (without children) */
69 && !peer_cfg->is_mediation(peer_cfg)
70 #endif /* ME */
71 )
72 {
73 DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA to recreate");
74 return FAILED;
75 }
76
77 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager, TRUE);
78
79 new->set_peer_cfg(new, peer_cfg);
80 host = this->ike_sa->get_other_host(this->ike_sa);
81 new->set_other_host(new, host->clone(host));
82 host = this->ike_sa->get_my_host(this->ike_sa);
83 new->set_my_host(new, host->clone(host));
84 /* if we already have a virtual IP, we reuse it */
85 host = this->ike_sa->get_virtual_ip(this->ike_sa, TRUE);
86 if (host)
87 {
88 new->set_virtual_ip(new, TRUE, host);
89 }
90
91 #ifdef ME
92 /* we initiate the new IKE_SA of the mediation connection without CHILD_SA */
93 if (peer_cfg->is_mediation(peer_cfg))
94 {
95 if (new->initiate(new, NULL, 0, NULL, NULL) == DESTROY_ME)
96 {
97 charon->ike_sa_manager->checkin_and_destroy(
98 charon->ike_sa_manager, new);
99 /* set threads active IKE_SA after checkin */
100 charon->bus->set_sa(charon->bus, this->ike_sa);
101 DBG1(DBG_IKE, "reauthenticating IKE_SA failed");
102 return FAILED;
103 }
104 }
105 #endif /* ME */
106
107 enumerator = this->ike_sa->create_child_sa_enumerator(this->ike_sa);
108 while (enumerator->enumerate(enumerator, (void**)&child_sa))
109 {
110 switch (child_sa->get_state(child_sa))
111 {
112 case CHILD_ROUTED:
113 {
114 /* move routed child directly */
115 this->ike_sa->remove_child_sa(this->ike_sa, enumerator);
116 new->add_child_sa(new, child_sa);
117 break;
118 }
119 default:
120 {
121 /* initiate/queue all child SAs */
122 child_cfg_t *child_cfg = child_sa->get_config(child_sa);
123 child_cfg->get_ref(child_cfg);
124 if (new->initiate(new, child_cfg, 0, NULL, NULL) == DESTROY_ME)
125 {
126 enumerator->destroy(enumerator);
127 charon->ike_sa_manager->checkin_and_destroy(
128 charon->ike_sa_manager, new);
129 /* set threads active IKE_SA after checkin */
130 charon->bus->set_sa(charon->bus, this->ike_sa);
131 DBG1(DBG_IKE, "reauthenticating IKE_SA failed");
132 return FAILED;
133 }
134 break;
135 }
136 }
137 }
138 enumerator->destroy(enumerator);
139 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
140 /* set threads active IKE_SA after checkin */
141 charon->bus->set_sa(charon->bus, this->ike_sa);
142
143 /* we always destroy the obsolete IKE_SA */
144 return DESTROY_ME;
145 }
146
147 METHOD(task_t, get_type, task_type_t,
148 private_ike_reauth_t *this)
149 {
150 return IKE_REAUTH;
151 }
152
153 METHOD(task_t, migrate, void,
154 private_ike_reauth_t *this, ike_sa_t *ike_sa)
155 {
156 this->ike_delete->task.migrate(&this->ike_delete->task, ike_sa);
157 this->ike_sa = ike_sa;
158 }
159
160 METHOD(task_t, destroy, void,
161 private_ike_reauth_t *this)
162 {
163 this->ike_delete->task.destroy(&this->ike_delete->task);
164 free(this);
165 }
166
167 /*
168 * Described in header.
169 */
170 ike_reauth_t *ike_reauth_create(ike_sa_t *ike_sa)
171 {
172 private_ike_reauth_t *this;
173
174 INIT(this,
175 .public = {
176 .task = {
177 .get_type = _get_type,
178 .migrate = _migrate,
179 .build = _build_i,
180 .process = _process_i,
181 .destroy = _destroy,
182 },
183 },
184 .ike_sa = ike_sa,
185 .ike_delete = ike_delete_create(ike_sa, TRUE),
186 );
187
188 return &this->public;
189 }
190