/*
 ******************************************************************************
 *                     INTERPEAK SOURCE FILE
 *
 *   Document no: @(#) $Name: VXWORKS_ITER40_2019102207 $ $RCSfile: ipmip4_vendor_ext.c,v $ $Revision: 1.5 $
 *   $Source: /home/interpeak/CVSRoot/ipmip4/config/ipmip4_vendor_ext.c,v $
 *   $Author: jhorteli $
 *   $State: Exp $ $Locker:  $
 *
 *   INTERPEAK_COPYRIGHT_STRING
 *     Design and implementation by Joel Hortelius <joel.hortelis@interpeak.se>
 ******************************************************************************
 */


/*
 ****************************************************************************
 * 1                    DESCRIPTION
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 2                    CONFIGURATION
 ****************************************************************************
 */

#include "ipmip4_config.h"

/*
 ****************************************************************************
 * 3                    INCLUDE FILES
 ****************************************************************************
 */

#define IPCOM_USE_CLIB_PROTO
#include <ipcom_clib.h>
#include <ipcom_drv_eth_filter.h>
#include <ipcom_err.h>
#include <ipcom_hash.h>
#include <ipcom_inet.h>
#include <ipcom_ipd.h>
#include <ipcom_list.h>
#include <ipcom_os.h>
#include <ipcom_sock.h>
#include <ipcom_sock2.h>
#include <ipcom_sysctl.h>
#include <ipcom_syslog.h>
#include <ipcom_netif.h>
#include <ipcom_sysvar.h>

#include "ipmip4.h"
#include <private/ipmip4_msgext.h>
#include <private/ipmip4_util.h>

/*
 ****************************************************************************
 * 4                    DEFINES
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 5                    TYPES
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 6                    EXTERN PROTOTYPES
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 7                    LOCAL PROTOTYPES
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 8                    DATA
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 9                    STATIC FUNCTIONS
 ****************************************************************************
 */

/*
 ****************************************************************************
 * 10                   GLOBAL FUNCTIONS
 ****************************************************************************
 */

/*
 *===========================================================================
 *                    ipmip4_vendor_ext_parse_cisco
 *===========================================================================
 * Description: Parse a cisco extension.
 * Parameters:  mobile      - The mobile structure to store the result in.
 *              uhdr        - The UHDR
 * Returns:     IPMIP4_REG_EXT_SUCCESS on succes, IPMIP4_REG_EXT_UNKNOWN if
 *              not known; other error code if failed.
 *
 */
IP_GLOBAL int 
ipmip4_vendor_ext_parse_cisco(struct Ipmip4_msgext_mobile *mobile,
                              union Ipmip4_msgext_uhdr    *uhdr)
{
    Ipmip4_nvse_t *nvse;

    /* There are no CISCO CVSE's */
    if (IPMIP4_MSGEXT_UHDR_TYPE(uhdr) ==  IPMIP4_EXT_TYPE_CVSE)
        return IPMIP4_REG_EXT_UNKNOWN_VSE;

    /* Get the NVSE data */
    nvse = (Ipmip4_nvse_t *)IPMIP4_MSGEXT_SHDR_EXT_DATA(uhdr);
    switch (IP_GET_NTOHS(nvse->vendor_type))
    {
    case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF:
        /* Must be the NVSE header + 2 byte subtype minimum */
        if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 2)
            return IPMIP4_REG_EXT_POORLY_FORMED;
        switch (IP_GET_HTONS(IPMIP4_MSGEXT_NVSE_EXT_DATA(uhdr)))
        {
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_REQ:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 4)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.cfg_req    = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_PREFIXLEN:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 4)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.prefixlen  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_DNS_SERVER:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 10)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.dns_server  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_DHCP_SERVER:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 6)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.dhcp_server  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_DHCP_CID:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 4)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.dhcp_cid  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_DEFAULT_GW:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 6)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.default_gw  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_DNS_SUFFIX:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 3)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.dns_suffix  = uhdr;
            break;
        case IPMIP4_VENDOR_EXT_MSGEXT_CISCO_HOSTCONF_CONFIG_URL:
            if (IPMIP4_MSGEXT_NVSE_EXT_SIZE(uhdr) < 2)
                return IPMIP4_REG_EXT_POORLY_FORMED;
            mobile->vendor.cisco.config_url  = uhdr;
            break;
        default:
            return IPMIP4_REG_EXT_UNKNOWN_VSE;
        }
        break;
    default:
        return IPMIP4_REG_EXT_UNKNOWN_VSE;
    }    

    return IPMIP4_REG_EXT_SUCCESS;
}

/*
 ****************************************************************************
 * 11                   PUBLIC FUNCTIONS
 ****************************************************************************
 */

/*
 ****************************************************************************
 *                      END OF FILE
 ****************************************************************************
 */