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Remove some assumptions about DHCP obtaining only a single options block.

pull/1/head
Michael Brown 2007-11-21 04:48:18 +00:00
parent 8d18338ae7
commit fb809da2df
4 changed files with 23 additions and 14 deletions
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2
src/include/gpxe/dhcp.h
View File

@ -512,6 +512,8 @@ dhcpopt_put ( struct dhcp_option_block *options ) {
ref_put ( &options->refcnt ); ref_put ( &options->refcnt );
} }
extern struct list_head dhcp_option_blocks;
extern unsigned long dhcp_num_option ( struct dhcp_option *option ); extern unsigned long dhcp_num_option ( struct dhcp_option *option );
extern void dhcp_ipv4_option ( struct dhcp_option *option, extern void dhcp_ipv4_option ( struct dhcp_option *option,
struct in_addr *inp ); struct in_addr *inp );

6
src/net/dhcpopts.c
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@ -35,7 +35,7 @@
*/ */
/** List of registered DHCP option blocks */ /** List of registered DHCP option blocks */
static LIST_HEAD ( option_blocks ); LIST_HEAD ( dhcp_option_blocks );
/** Registered DHCP option applicators */ /** Registered DHCP option applicators */
static struct dhcp_option_applicator dhcp_option_applicators[0] static struct dhcp_option_applicator dhcp_option_applicators[0]
@ -259,7 +259,7 @@ struct dhcp_option * find_dhcp_option ( struct dhcp_option_block *options,
if ( options ) { if ( options ) {
return find_dhcp_option_with_encap ( options, tag, NULL ); return find_dhcp_option_with_encap ( options, tag, NULL );
} else { } else {
list_for_each_entry ( options, &option_blocks, list ) { list_for_each_entry ( options, &dhcp_option_blocks, list ) {
if ( ( option = find_dhcp_option ( options, tag ) ) ) if ( ( option = find_dhcp_option ( options, tag ) ) )
return option; return option;
} }
@ -283,7 +283,7 @@ void register_dhcp_options ( struct dhcp_option_block *options ) {
options, options->priority ); options, options->priority );
/* Insert after any existing blocks which have a higher priority */ /* Insert after any existing blocks which have a higher priority */
list_for_each_entry ( existing, &option_blocks, list ) { list_for_each_entry ( existing, &dhcp_option_blocks, list ) {
if ( options->priority > existing->priority ) if ( options->priority > existing->priority )
break; break;
} }

10
src/net/udp/dhcp.c
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@ -1006,14 +1006,18 @@ int dhcp_configure_netdev ( struct net_device *netdev,
struct in_addr gateway = { INADDR_NONE }; struct in_addr gateway = { INADDR_NONE };
int rc; int rc;
/* Clear any existing routing table entry */
del_ipv4_address ( netdev );
/* Retrieve IP address configuration */ /* Retrieve IP address configuration */
find_dhcp_ipv4_option ( options, DHCP_EB_YIADDR, &address ); find_dhcp_ipv4_option ( options, DHCP_EB_YIADDR, &address );
find_dhcp_ipv4_option ( options, DHCP_SUBNET_MASK, &netmask ); find_dhcp_ipv4_option ( options, DHCP_SUBNET_MASK, &netmask );
find_dhcp_ipv4_option ( options, DHCP_ROUTERS, &gateway ); find_dhcp_ipv4_option ( options, DHCP_ROUTERS, &gateway );
/* Do nothing unless we have at least an IP address to use */
if ( ! address.s_addr )
return 0;
/* Clear any existing routing table entry */
del_ipv4_address ( netdev );
/* Set up new IP address configuration */ /* Set up new IP address configuration */
if ( ( rc = add_ipv4_address ( netdev, address, netmask, if ( ( rc = add_ipv4_address ( netdev, address, netmask,
gateway ) ) != 0 ) { gateway ) ) != 0 ) {

19
src/usr/dhcpmgmt.c
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@ -32,27 +32,30 @@
* *
*/ */
static struct dhcp_option_block *dhcp_options = NULL;
static int dhcp_success ( struct net_device *netdev, static int dhcp_success ( struct net_device *netdev,
struct dhcp_option_block *options ) { struct dhcp_option_block *options ) {
dhcp_options = dhcpopt_get ( options ); DBGC ( options, "DHCP client registering options %p\n", options );
register_dhcp_options ( options ); register_dhcp_options ( options );
return dhcp_configure_netdev ( netdev, options ); return dhcp_configure_netdev ( netdev, options );
} }
int dhcp ( struct net_device *netdev ) { int dhcp ( struct net_device *netdev ) {
struct dhcp_option_block *options;
struct dhcp_option_block *tmp;
int rc; int rc;
/* Check we can open the interface first */ /* Check we can open the interface first */
if ( ( rc = ifopen ( netdev ) ) != 0 ) if ( ( rc = ifopen ( netdev ) ) != 0 )
return rc; return rc;
/* Unregister any previously acquired options */ /* Unregister any option blocks acquired via DHCP */
if ( dhcp_options ) { list_for_each_entry_safe ( options, tmp, &dhcp_option_blocks, list ) {
unregister_dhcp_options ( dhcp_options ); /* Skip static option blocks (e.g. from NVS) */
dhcpopt_put ( dhcp_options ); if ( find_dhcp_option ( options, DHCP_MESSAGE_TYPE ) ) {
dhcp_options = NULL; DBGC ( options, "DHCP client unregistering options "
"%p\n", options );
unregister_dhcp_options ( options );
}
} }
/* Perform DHCP */ /* Perform DHCP */