1 /* 2 * Copyright (C) 2009 Joshua Oreman <oremanj (at) rwcr.net>. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of the 7 * License, or any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 FILE_LICENCE ( GPL2_OR_LATER ); 20 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <gpxe/dhcp.h> 25 #include <gpxe/dhcppkt.h> 26 #include <gpxe/netdevice.h> 27 #include <gpxe/iobuf.h> 28 #include <gpxe/uaccess.h> 29 30 /** @file 31 * 32 * Cached DHCP packet handling 33 * 34 */ 35 36 /** 37 * Store cached DHCPACK packet 38 * 39 * @v data User pointer to cached DHCP packet data 40 * @v len Length of cached DHCP packet data 41 * @ret rc Return status code 42 * 43 * This function should be called by the architecture-specific 44 * get_cached_dhcpack() handler. 45 */ 46 void store_cached_dhcpack ( userptr_t data, size_t len ) { 47 struct dhcp_packet *dhcppkt; 48 struct dhcphdr *dhcphdr; 49 struct settings *parent; 50 int rc; 51 52 /* Create DHCP packet */ 53 dhcppkt = zalloc ( sizeof ( *dhcppkt ) + len ); 54 if ( ! dhcppkt ) 55 return; 56 57 /* Fill in data for DHCP packet */ 58 dhcphdr = ( ( ( void * ) dhcppkt ) + sizeof ( * dhcppkt ) ); 59 copy_from_user ( dhcphdr, data, 0, len ); 60 dhcppkt_init ( dhcppkt, dhcphdr, len ); 61 DBG_HD ( dhcppkt->options.data, dhcppkt->options.len ); 62 63 /* Register settings on the last opened network device. 64 * This will have the effect of registering cached settings 65 * with a network device when "dhcp netX" is performed for that 66 * device, which is usually what we want. 67 */ 68 parent = netdev_settings ( last_opened_netdev() ); 69 if ( ( rc = register_settings ( &dhcppkt->settings, parent ) ) != 0 ) 70 DBG ( "DHCP could not register cached settings: %s\n", 71 strerror ( rc ) ); 72 73 dhcppkt_put ( dhcppkt ); 74 75 DBG ( "DHCP registered cached settings\n" ); 76 } 77
