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