dhcpopts.h

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#ifndef _IPXE_DHCPOPTS_H
#define _IPXE_DHCPOPTS_H
 
/** @file
 *
 * DHCP options
 *
 */
 
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
FILE_SECBOOT ( PERMITTED );
 
#include <stdint.h>
 
/** A DHCP options block */
struct dhcp_options {
        /** Option block raw data */
        void *data;
        /** Option block used length */
        size_t used_len;
        /** Option block allocated length */
        size_t alloc_len;
        /** Reallocate option block raw data
         *
         * @v options           DHCP option block
         * @v len               New length
         * @ret rc              Return status code
         */
        int ( * realloc ) ( struct dhcp_options *options, size_t len );
};
 
extern int dhcpopt_applies ( unsigned int tag );
extern int dhcpopt_store ( struct dhcp_options *options, unsigned int tag,
                           const void *data, size_t len );
extern int dhcpopt_fetch ( struct dhcp_options *options, unsigned int tag,
                           void *data, size_t len );
extern void dhcpopt_init ( struct dhcp_options *options,
                           void *data, size_t alloc_len,
                           int ( * realloc ) ( struct dhcp_options *options,
                                               size_t len ) );
extern void dhcpopt_update_used_len ( struct dhcp_options *options );
extern int dhcpopt_no_realloc ( struct dhcp_options *options, size_t len );
 
#endif /* _IPXE_DHCPOPTS_H */