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#ifndef _IPXE_DHCPPKT_H
#define _IPXE_DHCPPKT_H
/** @file
*
* DHCP packets
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/dhcp.h>
#include <ipxe/dhcpopts.h>
#include <ipxe/refcnt.h>
/**
* A DHCP packet
*
*/
struct dhcp_packet {
/** Reference counter */
struct refcnt refcnt;
/** The DHCP packet contents */
struct dhcphdr *dhcphdr;
/** DHCP options */
struct dhcp_options options;
/** Settings interface */
struct settings settings;
};
/**
* Increment reference count on DHCP packet
*
* @v dhcppkt DHCP packet
* @ret dhcppkt DHCP packet
*/
static inline __attribute__ (( always_inline )) struct dhcp_packet *
dhcppkt_get ( struct dhcp_packet *dhcppkt ) {
ref_get ( &dhcppkt->refcnt );
return dhcppkt;
}
/**
* Decrement reference count on DHCP packet
*
* @v dhcppkt DHCP packet
*/
static inline __attribute__ (( always_inline )) void
dhcppkt_put ( struct dhcp_packet *dhcppkt ) {
ref_put ( &dhcppkt->refcnt );
}
/**
* Get used length of DHCP packet
*
* @v dhcppkt DHCP packet
* @ret len Used length
*/
static inline int dhcppkt_len ( struct dhcp_packet *dhcppkt ) {
return ( offsetof ( struct dhcphdr, options ) +
dhcppkt->options.used_len );
}
extern int dhcppkt_store ( struct dhcp_packet *dhcppkt, unsigned int tag,
const void *data, size_t len );
extern int dhcppkt_fetch ( struct dhcp_packet *dhcppkt, unsigned int tag,
void *data, size_t len );
extern void dhcppkt_init ( struct dhcp_packet *dhcppkt,
struct dhcphdr *data, size_t len );
#endif /* _IPXE_DHCPPKT_H */
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