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[dhcp] Remove redundant length fields in struct dhcp_packet

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The max_len field is never used, and the len field is used only by
dhcp_tx().  Remove these two fields, and perform the necessary trivial
calculation in dhcp_tx() instead.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-11-30 00:22:49 +00:00
parent dc462e8b3b
commit 6cee8904d1
3 changed files with 12 additions and 16 deletions
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14
src/include/ipxe/dhcppkt.h
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@@ -22,10 +22,6 @@ struct dhcp_packet {
struct refcnt refcnt;
/** The DHCP packet contents */
struct dhcphdr *dhcphdr;
/** Maximum length of the DHCP packet buffer */
size_t max_len;
/** Used length of the DHCP packet buffer */
size_t len;
/** DHCP options */
struct dhcp_options options;
/** Settings interface */
@@ -54,6 +50,16 @@ 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.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,