payload: Use common prefixes for all payload type identifiers
[strongswan.git] / src / libcharon / sa / ikev1 / tasks / isakmp_dpd.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 "isakmp_dpd.h"
17
18 #include <daemon.h>
19 #include <encoding/payloads/notify_payload.h>
20
21 typedef struct private_isakmp_dpd_t private_isakmp_dpd_t;
22
23 /**
24 * Private members of a isakmp_dpd_t task.
25 */
26 struct private_isakmp_dpd_t {
27
28 /**
29 * Public methods and task_t interface.
30 */
31 isakmp_dpd_t public;
32
33 /**
34 * Sequence number.
35 */
36 u_int32_t seqnr;
37
38 /**
39 * DPD notify type
40 */
41 notify_type_t type;
42
43 /**
44 * IKE SA we are serving.
45 */
46 ike_sa_t *ike_sa;
47 };
48
49 METHOD(task_t, build, status_t,
50 private_isakmp_dpd_t *this, message_t *message)
51 {
52 notify_payload_t *notify;
53 ike_sa_id_t *ike_sa_id;
54 u_int64_t spi_i, spi_r;
55 u_int32_t seqnr;
56 chunk_t spi;
57
58 notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
59 PROTO_IKE, this->type);
60 seqnr = htonl(this->seqnr);
61 ike_sa_id = this->ike_sa->get_id(this->ike_sa);
62 spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
63 spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
64 spi = chunk_cata("cc", chunk_from_thing(spi_i), chunk_from_thing(spi_r));
65
66 notify->set_spi_data(notify, spi);
67 notify->set_notification_data(notify, chunk_from_thing(seqnr));
68
69 message->add_payload(message, (payload_t*)notify);
70
71 return SUCCESS;
72 }
73
74 METHOD(task_t, process, status_t,
75 private_isakmp_dpd_t *this, message_t *message)
76 {
77 /* done in task manager */
78 return FAILED;
79 }
80
81 METHOD(task_t, get_type, task_type_t,
82 private_isakmp_dpd_t *this)
83 {
84 return TASK_ISAKMP_DPD;
85 }
86
87 METHOD(task_t, migrate, void,
88 private_isakmp_dpd_t *this, ike_sa_t *ike_sa)
89 {
90 this->ike_sa = ike_sa;
91 }
92
93 METHOD(task_t, destroy, void,
94 private_isakmp_dpd_t *this)
95 {
96 free(this);
97 }
98
99 /*
100 * Described in header.
101 */
102 isakmp_dpd_t *isakmp_dpd_create(ike_sa_t *ike_sa, notify_type_t type,
103 u_int32_t seqnr)
104 {
105 private_isakmp_dpd_t *this;
106
107 INIT(this,
108 .public = {
109 .task = {
110 .get_type = _get_type,
111 .build = _build,
112 .process = _process,
113 .migrate = _migrate,
114 .destroy = _destroy,
115 },
116 },
117 .ike_sa = ike_sa,
118 .seqnr = seqnr,
119 .type = type,
120 );
121
122 return &this->public;
123 }