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#include <string.h>
#include <vsprintf.h>
#include <byteswap.h>
#include <gpxe/ip.h>
#include <gpxe/dhcp.h>
int test_dhcp ( struct net_device *netdev ) {
struct dhcp_session dhcp;
struct in_addr address = { htonl ( 0 ) };
struct in_addr netmask = { htonl ( 0 ) };
struct in_addr gateway = { INADDR_NONE };
int rc;
/* Bring IP interface up with address 0.0.0.0 */
if ( ( rc = add_ipv4_address ( netdev, address, netmask,
gateway ) ) != 0 )
goto out_no_del_ipv4;
/* Issue DHCP request */
memset ( &dhcp, 0, sizeof ( dhcp ) );
dhcp.netdev = netdev;
if ( ( rc = async_wait ( start_dhcp ( &dhcp ) ) ) != 0 )
goto out_no_options;
/* Retrieve IP address configuration */
find_dhcp_ipv4_option ( dhcp.options, DHCP_EB_YIADDR, &address );
find_dhcp_ipv4_option ( dhcp.options, DHCP_SUBNET_MASK, &netmask );
find_dhcp_ipv4_option ( dhcp.options, DHCP_ROUTERS, &gateway );
/* Remove old IP address configuration */
del_ipv4_address ( netdev );
/* Set up new IP address configuration */
if ( ( rc = add_ipv4_address ( netdev, address, netmask,
gateway ) ) != 0 )
goto out_no_del_ipv4;
printf ( "IP %s", inet_ntoa ( address ) );
printf ( " netmask %s", inet_ntoa ( netmask ) );
printf ( " gateway %s\n", inet_ntoa ( gateway ) );
/* Free DHCP options */
free_dhcp_options ( dhcp.options );
out_no_options:
/* Take down IP interface */
del_ipv4_address ( netdev );
out_no_del_ipv4:
return rc;
}
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