~eivnaes/sstp-client/1.0.13

/*!

 * @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;

}