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/*
* Copyright (C) 2010 Sansar Choinyambuu
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pb_language_preference_msg.h"
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <utils/debug.h>
typedef struct private_pb_language_preference_msg_t private_pb_language_preference_msg_t;
/**
* PB-Language-Preference message (see section 4.10 of RFC 5793)
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Language Preference (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define PB_LANG_PREFIX "Accept-Language: "
#define PB_LANG_PREFIX_LEN strlen(PB_LANG_PREFIX)
/**
* Private data of a pb_language_preference_msg_t object.
*
*/
struct private_pb_language_preference_msg_t {
/**
* Public pb_access_recommendation_msg_t interface.
*/
pb_language_preference_msg_t public;
/**
* PB-TNC message type
*/
pen_type_t type;
/**
* Language preference
*/
chunk_t language_preference;
/**
* Encoded message
*/
chunk_t encoding;
};
METHOD(pb_tnc_msg_t, get_type, pen_type_t,
private_pb_language_preference_msg_t *this)
{
return this->type;
}
METHOD(pb_tnc_msg_t, get_encoding, chunk_t,
private_pb_language_preference_msg_t *this)
{
return this->encoding;
}
METHOD(pb_tnc_msg_t, build, void,
private_pb_language_preference_msg_t *this)
{
if (this->encoding.ptr)
{
return;
}
this->encoding = chunk_cat("cc",
chunk_create(PB_LANG_PREFIX, PB_LANG_PREFIX_LEN),
this->language_preference);
}
METHOD(pb_tnc_msg_t, process, status_t,
private_pb_language_preference_msg_t *this, uint32_t *offset)
{
chunk_t lang;
if (this->encoding.len >= PB_LANG_PREFIX_LEN &&
memeq(this->encoding.ptr, PB_LANG_PREFIX, PB_LANG_PREFIX_LEN))
{
lang = chunk_skip(this->encoding, PB_LANG_PREFIX_LEN);
this->language_preference = lang.len ? chunk_clone(lang) : chunk_empty;
}
else
{
DBG1(DBG_TNC, "language preference must be preceded by '%s'",
PB_LANG_PREFIX);
*offset = 0;
return FAILED;
}
if (this->language_preference.len &&
this->language_preference.ptr[this->language_preference.len-1] == '\0')
{
DBG1(DBG_TNC, "language preference must not be null terminated");
*offset = PB_LANG_PREFIX_LEN + this->language_preference.len - 1;
return FAILED;
}
return SUCCESS;
}
METHOD(pb_tnc_msg_t, destroy, void,
private_pb_language_preference_msg_t *this)
{
free(this->encoding.ptr);
free(this->language_preference.ptr);
free(this);
}
METHOD(pb_language_preference_msg_t, get_language_preference, chunk_t,
private_pb_language_preference_msg_t *this)
{
return this->language_preference;
}
/**
* See header
*/
pb_tnc_msg_t *pb_language_preference_msg_create_from_data(chunk_t data)
{
private_pb_language_preference_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_language_preference = _get_language_preference,
},
.type = { PEN_IETF, PB_MSG_LANGUAGE_PREFERENCE },
.encoding = chunk_clone(data),
);
return &this->public.pb_interface;
}
/**
* See header
*/
pb_tnc_msg_t *pb_language_preference_msg_create(chunk_t language_preference)
{
private_pb_language_preference_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_language_preference = _get_language_preference,
},
.type = { PEN_IETF, PB_MSG_LANGUAGE_PREFERENCE },
.language_preference = chunk_clone(language_preference),
);
return &this->public.pb_interface;
}
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