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/*!
* @brief Functions for libsstp-api
*
* @file sstp-api.c
*
* @author Copyright (C) 2011 Eivind Naess,
* All Rights Reserved
*
* @par License:
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdint.h>
#include <string.h>
#include <sstp-api.h>
SSTP_API
sstp_api_msg_st *sstp_api_msg_new(unsigned char *buf, sstp_api_msg_t type)
{
sstp_api_msg_st *msg = (sstp_api_msg_st*) buf;
msg->msg_magic = SSTP_API_MSG_MAGIC;
msg->msg_type = type;
msg->msg_len = 0;
return msg;
}
SSTP_API
int sstp_api_msg_len(sstp_api_msg_st *msg)
{
return (sizeof(*msg) + msg->msg_len);
}
SSTP_API
int sstp_api_msg_type(sstp_api_msg_st *msg, sstp_api_msg_t *type)
{
int retval = (-1);
/* Check the signature */
if (msg->msg_magic != SSTP_API_MSG_MAGIC)
{
goto done;
}
/* Return the message type */
*type = msg->msg_type;
/* Success! */
retval = 0;
done:
return (retval);
}
SSTP_API
void sstp_api_attr_add(sstp_api_msg_st *msg, sstp_api_attr_t type,
unsigned int len, void *data)
{
sstp_api_attr_st *attr = (sstp_api_attr_st*)
&msg->msg_data[msg->msg_len];
attr->attr_type = type;
attr->attr_len = len;
memcpy(&attr->attr_data[0], data, attr->attr_len);
msg->msg_len += (sizeof(*attr) + ALIGN32(attr->attr_len));
}
SSTP_API
int sstp_api_attr_parse(char *buf, int length, sstp_api_attr_st *list[],
int count)
{
int index = 0;
/* Reset the list of attribute pointers */
memset(list, 0, sizeof(sstp_api_attr_st*) * count);
/* Iterate over the memory */
while (index < length)
{
/* Get the attribute */
sstp_api_attr_st* attr = (sstp_api_attr_st*) &buf[index];
if (attr->attr_type > SSTP_API_ATTR_MAX ||
attr->attr_type <= SSTP_API_ATTR_UNKNOWN)
{
return -1;
}
/* Assign the attribute type and increment length */
list[attr->attr_type] = attr;
index += (sizeof(*attr) + ALIGN32(attr->attr_len));
}
return 0;
}
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