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Allow DHCP server to instruct gPXE to ignore ProxyDHCP (which will 

also avoid waiting for ProxyDHCP offers).

Also reduce the ProxyDHCP timeout, because it's already irritating me.
pull/1/head
Michael Brown 2007-11-21 22:10:04 +00:00
parent 0becbf5fba
commit b3abf25e3c
2 changed files with 24 additions and 9 deletions
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9
src/include/gpxe/dhcp.h
View File

@ -183,6 +183,13 @@ struct job_interface;
*
*/
/** Ignore ProxyDHCP
*
* If set to a non-zero value, gPXE will not wait for ProxyDHCP offers
* and will ignore any ProxyDHCP offers that it receives.
*/
#define DHCP_EB_NO_PROXYDHCP DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xb0 )
/** Network device descriptor
*
* Byte 0 is the bus type ID; remaining bytes depend on the bus type.
@ -514,7 +521,7 @@ dhcpopt_put ( struct dhcp_option_block *options ) {
}
/** Maximum time that we will wait for ProxyDHCP offers */
#define PROXYDHCP_WAIT_TIME ( TICKS_PER_SEC * 2 )
#define PROXYDHCP_WAIT_TIME ( TICKS_PER_SEC * 1 )
extern struct list_head dhcp_option_blocks;

24
src/net/udp/dhcp.c
View File

@ -832,9 +832,10 @@ static int dhcp_deliver_raw ( struct xfer_interface *xfer,
const struct dhcphdr *dhcphdr = data;
struct dhcp_option_block *options;
struct dhcp_option_block **store_options;
int is_proxy;
unsigned int msgtype;
unsigned long elapsed;
int is_proxy;
int ignore_proxy;
/* Check for matching transaction ID */
if ( dhcphdr->xid != dhcp_xid ( dhcp->netdev ) ) {
@ -878,17 +879,22 @@ static int dhcp_deliver_raw ( struct xfer_interface *xfer,
dhcpopt_put ( options );
}
/* If we don't yet have a standard DHCP response (i.e. one
* with an IP address), then just leave the timer running.
*/
if ( ! dhcp->options )
goto out;
/* Handle DHCP response */
ignore_proxy = find_dhcp_num_option ( dhcp->options,
DHCP_EB_NO_PROXYDHCP );
switch ( dhcp->state ) {
case DHCPDISCOVER:
/* If we have received a valid standard DHCP response
* (i.e. one with an IP address), and we have allowed
* sufficient time for ProxyDHCP reponses, then
* transition to making the DHCPREQUEST.
/* If we have allowed sufficient time for ProxyDHCP
* reponses, then transition to making the DHCPREQUEST.
*/
elapsed = ( currticks() - dhcp->start );
if ( dhcp->options &&
( elapsed > PROXYDHCP_WAIT_TIME ) ) {
if ( ignore_proxy || ( elapsed > PROXYDHCP_WAIT_TIME ) ) {
stop_timer ( &dhcp->timer );
dhcp->state = DHCPREQUEST;
dhcp_send_request ( dhcp );
@ -896,9 +902,10 @@ static int dhcp_deliver_raw ( struct xfer_interface *xfer,
break;
case DHCPREQUEST:
/* DHCP finished; register options and exit */
if ( dhcp->proxy_options )
if ( dhcp->proxy_options && ( ! ignore_proxy ) ) {
dhcp->register_options ( dhcp->netdev,
dhcp->proxy_options );
}
dhcp->register_options ( dhcp->netdev, dhcp->options );
dhcp_finished ( dhcp, 0 );
break;
@ -906,6 +913,7 @@ static int dhcp_deliver_raw ( struct xfer_interface *xfer,
assert ( 0 );
}
out:
return 0;
out_discard: