Don't invoke a child_updown hook when a quick mode to delete has been rekeyed
[strongswan.git] / src / libcharon / sa / ikev1 / tasks / quick_delete.c
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 #include "quick_delete.h"
17
18 #include <daemon.h>
19 #include <encoding/payloads/delete_payload.h>
20
21 typedef struct private_quick_delete_t private_quick_delete_t;
22
23 /**
24 * Private members of a quick_delete_t task.
25 */
26 struct private_quick_delete_t {
27
28 /**
29 * Public methods and task_t interface.
30 */
31 quick_delete_t public;
32
33 /**
34 * Assigned IKE_SA.
35 */
36 ike_sa_t *ike_sa;
37
38 /**
39 * Are we the initiator?
40 */
41 bool initiator;
42
43 /**
44 * Protocol of CHILD_SA to delete
45 */
46 protocol_id_t protocol;
47
48 /**
49 * Inbound SPI of CHILD_SA to delete
50 */
51 u_int32_t spi;
52
53 /**
54 * Send delete even if SA does not exist
55 */
56 bool force;
57
58 /**
59 * SA already expired?
60 */
61 bool expired;
62 };
63
64 /**
65 * Delete the specified CHILD_SA, if found
66 */
67 static bool delete_child(private_quick_delete_t *this,
68 protocol_id_t protocol, u_int32_t spi)
69 {
70 u_int64_t bytes_in, bytes_out;
71 child_sa_t *child_sa;
72 bool rekeyed;
73
74 child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, TRUE);
75 if (!child_sa)
76 { /* fallback and check for outbound SA */
77 child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, FALSE);
78 if (!child_sa)
79 {
80 return FALSE;
81 }
82 this->spi = spi = child_sa->get_spi(child_sa, TRUE);
83 }
84
85 rekeyed = child_sa->get_state(child_sa) == CHILD_REKEYING;
86 child_sa->set_state(child_sa, CHILD_DELETING);
87
88 if (this->expired)
89 {
90 DBG0(DBG_IKE, "closing expired CHILD_SA %s{%d} "
91 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
92 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
93 ntohl(child_sa->get_spi(child_sa, TRUE)),
94 ntohl(child_sa->get_spi(child_sa, FALSE)),
95 child_sa->get_traffic_selectors(child_sa, TRUE),
96 child_sa->get_traffic_selectors(child_sa, FALSE));
97 }
98 else
99 {
100 child_sa->get_usestats(child_sa, TRUE, NULL, &bytes_in);
101 child_sa->get_usestats(child_sa, FALSE, NULL, &bytes_out);
102
103 DBG0(DBG_IKE, "closing CHILD_SA %s{%d} with SPIs "
104 "%.8x_i (%llu bytes) %.8x_o (%llu bytes) and TS %#R=== %#R",
105 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
106 ntohl(child_sa->get_spi(child_sa, TRUE)), bytes_in,
107 ntohl(child_sa->get_spi(child_sa, FALSE)), bytes_out,
108 child_sa->get_traffic_selectors(child_sa, TRUE),
109 child_sa->get_traffic_selectors(child_sa, FALSE));
110 }
111
112 if (!rekeyed)
113 {
114 charon->bus->child_updown(charon->bus, child_sa, FALSE);
115 }
116
117 this->ike_sa->destroy_child_sa(this->ike_sa, protocol, spi);
118
119 /* TODO-IKEv1: handle close action? */
120
121 return TRUE;
122 }
123
124 METHOD(task_t, build_i, status_t,
125 private_quick_delete_t *this, message_t *message)
126 {
127 if (delete_child(this, this->protocol, this->spi) || this->force)
128 {
129 delete_payload_t *delete_payload;
130
131 DBG1(DBG_IKE, "sending DELETE for %N CHILD_SA with SPI %.8x",
132 protocol_id_names, this->protocol, ntohl(this->spi));
133
134 delete_payload = delete_payload_create(DELETE_V1, PROTO_ESP);
135 delete_payload->add_spi(delete_payload, this->spi);
136 message->add_payload(message, &delete_payload->payload_interface);
137
138 return SUCCESS;
139 }
140 return ALREADY_DONE;
141 }
142
143 METHOD(task_t, process_i, status_t,
144 private_quick_delete_t *this, message_t *message)
145 {
146 return FAILED;
147 }
148
149 METHOD(task_t, process_r, status_t,
150 private_quick_delete_t *this, message_t *message)
151 {
152 enumerator_t *payloads, *spis;
153 payload_t *payload;
154 delete_payload_t *delete_payload;
155 protocol_id_t protocol;
156 u_int32_t spi;
157
158 payloads = message->create_payload_enumerator(message);
159 while (payloads->enumerate(payloads, &payload))
160 {
161 if (payload->get_type(payload) == DELETE_V1)
162 {
163 delete_payload = (delete_payload_t*)payload;
164 protocol = delete_payload->get_protocol_id(delete_payload);
165 if (protocol != PROTO_ESP && protocol != PROTO_AH)
166 {
167 continue;
168 }
169 spis = delete_payload->create_spi_enumerator(delete_payload);
170 while (spis->enumerate(spis, &spi))
171 {
172 DBG1(DBG_IKE, "received DELETE for %N CHILD_SA with SPI %.8x",
173 protocol_id_names, protocol, ntohl(spi));
174 if (!delete_child(this, protocol, spi))
175 {
176 DBG1(DBG_IKE, "CHILD_SA not found, ignored");
177 continue;
178 }
179 }
180 spis->destroy(spis);
181 }
182 }
183 payloads->destroy(payloads);
184
185 return SUCCESS;
186 }
187
188 METHOD(task_t, build_r, status_t,
189 private_quick_delete_t *this, message_t *message)
190 {
191 return FAILED;
192 }
193
194 METHOD(task_t, get_type, task_type_t,
195 private_quick_delete_t *this)
196 {
197 return TASK_QUICK_DELETE;
198 }
199
200 METHOD(task_t, migrate, void,
201 private_quick_delete_t *this, ike_sa_t *ike_sa)
202 {
203 this->ike_sa = ike_sa;
204 }
205
206 METHOD(task_t, destroy, void,
207 private_quick_delete_t *this)
208 {
209 free(this);
210 }
211
212 /*
213 * Described in header.
214 */
215 quick_delete_t *quick_delete_create(ike_sa_t *ike_sa, protocol_id_t protocol,
216 u_int32_t spi, bool force, bool expired)
217 {
218 private_quick_delete_t *this;
219
220 INIT(this,
221 .public = {
222 .task = {
223 .get_type = _get_type,
224 .migrate = _migrate,
225 .destroy = _destroy,
226 },
227 },
228 .ike_sa = ike_sa,
229 .protocol = protocol,
230 .spi = spi,
231 .force = force,
232 .expired = expired,
233 );
234
235 if (protocol != PROTO_NONE)
236 {
237 this->public.task.build = _build_i;
238 this->public.task.process = _process_i;
239 }
240 else
241 {
242 this->public.task.build = _build_r;
243 this->public.task.process = _process_r;
244 }
245 return &this->public;
246 }