24dc4dac6bdd745a566243282dcba0dc8a51c6a8
[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 /**
46 * Implementation of task_t.build for initiator
47 */
48 static status_t build_i(private_ike_reauth_t *this, message_t *message)
49 {
50 return this->ike_delete->task.build(&this->ike_delete->task, message);
51 }
52
53 /**
54 * Implementation of task_t.process for initiator
55 */
56 static status_t process_i(private_ike_reauth_t *this, message_t *message)
57 {
58 ike_sa_t *new;
59 host_t *host;
60 enumerator_t *enumerator;
61 child_sa_t *child_sa;
62 peer_cfg_t *peer_cfg;
63
64 /* process delete response first */
65 this->ike_delete->task.process(&this->ike_delete->task, message);
66
67 peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
68
69 /* reauthenticate only if we have children */
70 if (this->ike_sa->get_child_count(this->ike_sa) == 0
71 #ifdef ME
72 /* we allow peers to reauth mediation connections (without children) */
73 && !peer_cfg->is_mediation(peer_cfg)
74 #endif /* ME */
75 )
76 {
77 DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA to recreate");
78 return FAILED;
79 }
80
81 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager, TRUE);
82
83 new->set_peer_cfg(new, peer_cfg);
84 host = this->ike_sa->get_other_host(this->ike_sa);
85 new->set_other_host(new, host->clone(host));
86 host = this->ike_sa->get_my_host(this->ike_sa);
87 new->set_my_host(new, host->clone(host));
88 /* if we already have a virtual IP, we reuse it */
89 host = this->ike_sa->get_virtual_ip(this->ike_sa, TRUE);
90 if (host)
91 {
92 new->set_virtual_ip(new, TRUE, host);
93 }
94
95 #ifdef ME
96 /* we initiate the new IKE_SA of the mediation connection without CHILD_SA */
97 if (peer_cfg->is_mediation(peer_cfg))
98 {
99 if (new->initiate(new, NULL, 0, NULL, NULL) == DESTROY_ME)
100 {
101 charon->ike_sa_manager->checkin_and_destroy(
102 charon->ike_sa_manager, new);
103 /* set threads active IKE_SA after checkin */
104 charon->bus->set_sa(charon->bus, this->ike_sa);
105 DBG1(DBG_IKE, "reauthenticating IKE_SA failed");
106 return FAILED;
107 }
108 }
109 #endif /* ME */
110
111 enumerator = this->ike_sa->create_child_sa_enumerator(this->ike_sa);
112 while (enumerator->enumerate(enumerator, (void**)&child_sa))
113 {
114 switch (child_sa->get_state(child_sa))
115 {
116 case CHILD_ROUTED:
117 {
118 /* move routed child directly */
119 this->ike_sa->remove_child_sa(this->ike_sa, enumerator);
120 new->add_child_sa(new, child_sa);
121 break;
122 }
123 default:
124 {
125 /* initiate/queue all child SAs */
126 child_cfg_t *child_cfg = child_sa->get_config(child_sa);
127 child_cfg->get_ref(child_cfg);
128 if (new->initiate(new, child_cfg, 0, NULL, NULL) == DESTROY_ME)
129 {
130 enumerator->destroy(enumerator);
131 charon->ike_sa_manager->checkin_and_destroy(
132 charon->ike_sa_manager, new);
133 /* set threads active IKE_SA after checkin */
134 charon->bus->set_sa(charon->bus, this->ike_sa);
135 DBG1(DBG_IKE, "reauthenticating IKE_SA failed");
136 return FAILED;
137 }
138 break;
139 }
140 }
141 }
142 enumerator->destroy(enumerator);
143 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
144 /* set threads active IKE_SA after checkin */
145 charon->bus->set_sa(charon->bus, this->ike_sa);
146
147 /* we always destroy the obsolete IKE_SA */
148 return DESTROY_ME;
149 }
150
151 /**
152 * Implementation of task_t.get_type
153 */
154 static task_type_t get_type(private_ike_reauth_t *this)
155 {
156 return IKE_REAUTH;
157 }
158
159 /**
160 * Implementation of task_t.migrate
161 */
162 static void migrate(private_ike_reauth_t *this, ike_sa_t *ike_sa)
163 {
164 this->ike_delete->task.migrate(&this->ike_delete->task, ike_sa);
165 this->ike_sa = ike_sa;
166 }
167
168 /**
169 * Implementation of task_t.destroy
170 */
171 static void destroy(private_ike_reauth_t *this)
172 {
173 this->ike_delete->task.destroy(&this->ike_delete->task);
174 free(this);
175 }
176
177 /*
178 * Described in header.
179 */
180 ike_reauth_t *ike_reauth_create(ike_sa_t *ike_sa)
181 {
182 private_ike_reauth_t *this = malloc_thing(private_ike_reauth_t);
183
184 this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
185 this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
186 this->public.task.destroy = (void(*)(task_t*))destroy;
187 this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
188 this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
189
190 this->ike_sa = ike_sa;
191 this->ike_delete = ike_delete_create(ike_sa, TRUE);
192
193 return &this->public;
194 }
195