2 * @file vendor_id_payload.c
4 * @brief Implementation of vendor_id_payload_t.
9 * Copyright (C) 2005 Jan Hutter, Martin Willi
10 * Hochschule fuer Technik Rapperswil
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
25 #include "vendor_id_payload.h"
28 typedef struct private_vendor_id_payload_t private_vendor_id_payload_t
;
31 * Private data of an vendor_id_payload_t object.
34 struct private_vendor_id_payload_t
{
36 * Public vendor_id_payload_t interface.
38 vendor_id_payload_t
public;
43 u_int8_t next_payload
;
51 * Length of this payload.
53 u_int16_t payload_length
;
56 * The contained vendor_id data value.
58 chunk_t vendor_id_data
;
62 * Encoding rules to parse or generate a VENDOR ID payload
64 * The defined offsets are the positions in a object of type
65 * private_vendor_id_payload_t.
68 encoding_rule_t vendor_id_payload_encodings
[] = {
69 /* 1 Byte next payload type, stored in the field next_payload */
70 { U_INT_8
, offsetof(private_vendor_id_payload_t
, next_payload
) },
71 /* the critical bit */
72 { FLAG
, offsetof(private_vendor_id_payload_t
, critical
) },
73 /* 7 Bit reserved bits, nowhere stored */
81 /* Length of the whole payload*/
82 { PAYLOAD_LENGTH
, offsetof(private_vendor_id_payload_t
, payload_length
)},
83 /* some vendor_id data bytes, length is defined in PAYLOAD_LENGTH */
84 { VID_DATA
, offsetof(private_vendor_id_payload_t
, vendor_id_data
) }
89 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
90 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
91 ! Next Payload !C! RESERVED ! Payload Length !
92 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
97 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
101 * Implementation of payload_t.verify.
103 static status_t
verify(private_vendor_id_payload_t
*this)
109 * Implementation of vendor_id_payload_t.get_encoding_rules.
111 static void get_encoding_rules(private_vendor_id_payload_t
*this, encoding_rule_t
**rules
, size_t *rule_count
)
113 *rules
= vendor_id_payload_encodings
;
114 *rule_count
= sizeof(vendor_id_payload_encodings
) / sizeof(encoding_rule_t
);
118 * Implementation of payload_t.get_type.
120 static payload_type_t
get_payload_type(private_vendor_id_payload_t
*this)
126 * Implementation of payload_t.get_next_type.
128 static payload_type_t
get_next_type(private_vendor_id_payload_t
*this)
130 return (this->next_payload
);
134 * Implementation of payload_t.set_next_type.
136 static void set_next_type(private_vendor_id_payload_t
*this,payload_type_t type
)
138 this->next_payload
= type
;
142 * Implementation of payload_t.get_length.
144 static size_t get_length(private_vendor_id_payload_t
*this)
146 return this->payload_length
;
150 * Implementation of vendor_id_payload_t.set_data.
152 static void set_data (private_vendor_id_payload_t
*this, chunk_t data
)
154 if (this->vendor_id_data
.ptr
!= NULL
)
156 chunk_free(&(this->vendor_id_data
));
158 this->vendor_id_data
.ptr
= clalloc(data
.ptr
,data
.len
);
159 this->vendor_id_data
.len
= data
.len
;
160 this->payload_length
= VENDOR_ID_PAYLOAD_HEADER_LENGTH
+ this->vendor_id_data
.len
;
164 * Implementation of vendor_id_payload_t.get_data.
166 static chunk_t
get_data (private_vendor_id_payload_t
*this)
168 return (this->vendor_id_data
);
172 * Implementation of vendor_id_payload_t.get_data_clone.
174 static chunk_t
get_data_clone (private_vendor_id_payload_t
*this)
177 if (this->vendor_id_data
.ptr
== NULL
)
179 return (this->vendor_id_data
);
181 cloned_data
.ptr
= clalloc(this->vendor_id_data
.ptr
,this->vendor_id_data
.len
);
182 cloned_data
.len
= this->vendor_id_data
.len
;
187 * Implementation of payload_t.destroy and vendor_id_payload_t.destroy.
189 static void destroy(private_vendor_id_payload_t
*this)
191 if (this->vendor_id_data
.ptr
!= NULL
)
193 chunk_free(&(this->vendor_id_data
));
199 * Described in header
201 vendor_id_payload_t
*vendor_id_payload_create()
203 private_vendor_id_payload_t
*this = malloc_thing(private_vendor_id_payload_t
);
205 /* interface functions */
206 this->public.payload_interface
.verify
= (status_t (*) (payload_t
*))verify
;
207 this->public.payload_interface
.get_encoding_rules
= (void (*) (payload_t
*, encoding_rule_t
**, size_t *) ) get_encoding_rules
;
208 this->public.payload_interface
.get_length
= (size_t (*) (payload_t
*)) get_length
;
209 this->public.payload_interface
.get_next_type
= (payload_type_t (*) (payload_t
*)) get_next_type
;
210 this->public.payload_interface
.set_next_type
= (void (*) (payload_t
*,payload_type_t
)) set_next_type
;
211 this->public.payload_interface
.get_type
= (payload_type_t (*) (payload_t
*)) get_payload_type
;
212 this->public.payload_interface
.destroy
= (void (*) (payload_t
*))destroy
;
214 /* public functions */
215 this->public.destroy
= (void (*) (vendor_id_payload_t
*)) destroy
;
216 this->public.set_data
= (void (*) (vendor_id_payload_t
*,chunk_t
)) set_data
;
217 this->public.get_data_clone
= (chunk_t (*) (vendor_id_payload_t
*)) get_data_clone
;
218 this->public.get_data
= (chunk_t (*) (vendor_id_payload_t
*)) get_data
;
220 /* private variables */
221 this->critical
= FALSE
;
222 this->next_payload
= NO_PAYLOAD
;
223 this->payload_length
= VENDOR_ID_PAYLOAD_HEADER_LENGTH
;
224 this->vendor_id_data
= CHUNK_INITIALIZER
;
226 return (&(this->public));