diff options
Diffstat (limited to 'gpxe/src/net/fakedhcp.c')
| -rw-r--r-- | gpxe/src/net/fakedhcp.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/gpxe/src/net/fakedhcp.c b/gpxe/src/net/fakedhcp.c deleted file mode 100644 index ad3f046f..00000000 --- a/gpxe/src/net/fakedhcp.c +++ /dev/null @@ -1,217 +0,0 @@ -/* - * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <stdint.h> -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include <gpxe/settings.h> -#include <gpxe/netdevice.h> -#include <gpxe/dhcppkt.h> -#include <gpxe/fakedhcp.h> - -/** @file - * - * Fake DHCP packets - * - */ - -/** - * Copy settings to DHCP packet - * - * @v dest Destination DHCP packet - * @v source Source settings block - * @v encapsulator Encapsulating setting tag number, or zero - * @ret rc Return status code - */ -static int copy_encap_settings ( struct dhcp_packet *dest, - struct settings *source, - unsigned int encapsulator ) { - struct setting setting = { .name = "" }; - unsigned int subtag; - unsigned int tag; - int len; - int check_len; - int rc; - - for ( subtag = DHCP_MIN_OPTION; subtag <= DHCP_MAX_OPTION; subtag++ ) { - tag = DHCP_ENCAP_OPT ( encapsulator, subtag ); - switch ( tag ) { - case DHCP_EB_ENCAP: - case DHCP_VENDOR_ENCAP: - /* Process encapsulated settings */ - if ( ( rc = copy_encap_settings ( dest, source, - tag ) ) != 0 ) - return rc; - break; - default: - /* Copy setting, if present */ - setting.tag = tag; - len = fetch_setting_len ( source, &setting ); - if ( len < 0 ) - break; - { - char buf[len]; - - check_len = fetch_setting ( source, &setting, - buf, sizeof (buf)); - assert ( check_len == len ); - if ( ( rc = dhcppkt_store ( dest, tag, buf, - sizeof(buf) )) !=0) - return rc; - } - break; - } - } - - return 0; -} - -/** - * Copy settings to DHCP packet - * - * @v dest Destination DHCP packet - * @v source Source settings block - * @ret rc Return status code - */ -static int copy_settings ( struct dhcp_packet *dest, - struct settings *source ) { - return copy_encap_settings ( dest, source, 0 ); -} - -/** - * Create fake DHCPDISCOVER packet - * - * @v netdev Network device - * @v data Buffer for DHCP packet - * @v max_len Size of DHCP packet buffer - * @ret rc Return status code - * - * Used by external code. - */ -int create_fakedhcpdiscover ( struct net_device *netdev, - void *data, size_t max_len ) { - struct dhcp_packet dhcppkt; - struct in_addr ciaddr = { 0 }; - int rc; - - if ( ( rc = dhcp_create_request ( &dhcppkt, netdev, DHCPDISCOVER, - ciaddr, data, max_len ) ) != 0 ) { - DBG ( "Could not create DHCPDISCOVER: %s\n", - strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** - * Create fake DHCPACK packet - * - * @v netdev Network device - * @v data Buffer for DHCP packet - * @v max_len Size of DHCP packet buffer - * @ret rc Return status code - * - * Used by external code. - */ -int create_fakedhcpack ( struct net_device *netdev, - void *data, size_t max_len ) { - struct dhcp_packet dhcppkt; - int rc; - - /* Create base DHCPACK packet */ - if ( ( rc = dhcp_create_packet ( &dhcppkt, netdev, DHCPACK, NULL, 0, - data, max_len ) ) != 0 ) { - DBG ( "Could not create DHCPACK: %s\n", strerror ( rc ) ); - return rc; - } - - /* Merge in globally-scoped settings, then netdev-specific - * settings. Do it in this order so that netdev-specific - * settings take precedence regardless of stated priorities. - */ - if ( ( rc = copy_settings ( &dhcppkt, NULL ) ) != 0 ) { - DBG ( "Could not set DHCPACK global settings: %s\n", - strerror ( rc ) ); - return rc; - } - if ( ( rc = copy_settings ( &dhcppkt, - netdev_settings ( netdev ) ) ) != 0 ) { - DBG ( "Could not set DHCPACK netdev settings: %s\n", - strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** - * Create fake PXE Boot Server ACK packet - * - * @v netdev Network device - * @v data Buffer for DHCP packet - * @v max_len Size of DHCP packet buffer - * @ret rc Return status code - * - * Used by external code. - */ -int create_fakepxebsack ( struct net_device *netdev, - void *data, size_t max_len ) { - struct dhcp_packet dhcppkt; - struct settings *proxy_settings; - struct settings *pxebs_settings; - int rc; - - /* Identify available settings */ - proxy_settings = find_settings ( PROXYDHCP_SETTINGS_NAME ); - pxebs_settings = find_settings ( PXEBS_SETTINGS_NAME ); - if ( ( ! proxy_settings ) && ( ! pxebs_settings ) ) { - /* No PXE boot server; return the regular DHCPACK */ - return create_fakedhcpack ( netdev, data, max_len ); - } - - /* Create base DHCPACK packet */ - if ( ( rc = dhcp_create_packet ( &dhcppkt, netdev, DHCPACK, NULL, 0, - data, max_len ) ) != 0 ) { - DBG ( "Could not create PXE BS ACK: %s\n", - strerror ( rc ) ); - return rc; - } - - /* Merge in ProxyDHCP options */ - if ( proxy_settings && - ( ( rc = copy_settings ( &dhcppkt, proxy_settings ) ) != 0 ) ) { - DBG ( "Could not copy ProxyDHCP settings: %s\n", - strerror ( rc ) ); - return rc; - } - - /* Merge in BootServerDHCP options, if present */ - if ( pxebs_settings && - ( ( rc = copy_settings ( &dhcppkt, pxebs_settings ) ) != 0 ) ) { - DBG ( "Could not copy PXE BS settings: %s\n", - strerror ( rc ) ); - return rc; - } - - return 0; -} |