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Annotation of qemu/roms/ipxe/src/net/netdev_settings.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (C) 2008 Michael Brown <[email protected]>.
        !             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 <string.h>
        !            22: #include <errno.h>
        !            23: #include <byteswap.h>
        !            24: #include <ipxe/dhcp.h>
        !            25: #include <ipxe/dhcpopts.h>
        !            26: #include <ipxe/settings.h>
        !            27: #include <ipxe/device.h>
        !            28: #include <ipxe/netdevice.h>
        !            29: 
        !            30: /** @file
        !            31:  *
        !            32:  * Network device configuration settings
        !            33:  *
        !            34:  */
        !            35: 
        !            36: /** Network device named settings */
        !            37: struct setting mac_setting __setting ( SETTING_NETDEV ) = {
        !            38:        .name = "mac",
        !            39:        .description = "MAC address",
        !            40:        .type = &setting_type_hex,
        !            41:        .tag = NETDEV_SETTING_TAG_MAC,
        !            42: };
        !            43: struct setting busid_setting __setting ( SETTING_NETDEV ) = {
        !            44:        .name = "busid",
        !            45:        .description = "Bus ID",
        !            46:        .type = &setting_type_hex,
        !            47:        .tag = NETDEV_SETTING_TAG_BUS_ID,
        !            48: };
        !            49: 
        !            50: /**
        !            51:  * Check applicability of network device setting
        !            52:  *
        !            53:  * @v settings         Settings block
        !            54:  * @v setting          Setting
        !            55:  * @ret applies                Setting applies within this settings block
        !            56:  */
        !            57: static int netdev_applies ( struct settings *settings __unused,
        !            58:                            struct setting *setting ) {
        !            59: 
        !            60:        return ( IS_NETDEV_SETTING_TAG ( setting->tag ) ||
        !            61:                 dhcpopt_applies ( setting->tag ) );
        !            62: }
        !            63: 
        !            64: /**
        !            65:  * Store value of network device setting
        !            66:  *
        !            67:  * @v settings         Settings block
        !            68:  * @v setting          Setting to store
        !            69:  * @v data             Setting data, or NULL to clear setting
        !            70:  * @v len              Length of setting data
        !            71:  * @ret rc             Return status code
        !            72:  */
        !            73: static int netdev_store ( struct settings *settings, struct setting *setting,
        !            74:                          const void *data, size_t len ) {
        !            75:        struct net_device *netdev = container_of ( settings, struct net_device,
        !            76:                                                   settings.settings );
        !            77: 
        !            78:        if ( setting_cmp ( setting, &mac_setting ) == 0 ) {
        !            79:                if ( len != netdev->ll_protocol->ll_addr_len )
        !            80:                        return -EINVAL;
        !            81:                memcpy ( netdev->ll_addr, data, len );
        !            82:                return 0;
        !            83:        }
        !            84:        if ( setting_cmp ( setting, &busid_setting ) == 0 )
        !            85:                return -ENOTSUP;
        !            86: 
        !            87:        return generic_settings_store ( settings, setting, data, len );
        !            88: }
        !            89: 
        !            90: /**
        !            91:  * Fetch value of network device setting
        !            92:  *
        !            93:  * @v settings         Settings block
        !            94:  * @v setting          Setting to fetch
        !            95:  * @v data             Setting data, or NULL to clear setting
        !            96:  * @v len              Length of setting data
        !            97:  * @ret rc             Return status code
        !            98:  */
        !            99: static int netdev_fetch ( struct settings *settings, struct setting *setting,
        !           100:                          void *data, size_t len ) {
        !           101:        struct net_device *netdev = container_of ( settings, struct net_device,
        !           102:                                                   settings.settings );
        !           103:        struct device_description *desc = &netdev->dev->desc;
        !           104:        struct dhcp_netdev_desc dhcp_desc;
        !           105: 
        !           106:        if ( setting_cmp ( setting, &mac_setting ) == 0 ) {
        !           107:                if ( len > netdev->ll_protocol->ll_addr_len )
        !           108:                        len = netdev->ll_protocol->ll_addr_len;
        !           109:                memcpy ( data, netdev->ll_addr, len );
        !           110:                return netdev->ll_protocol->ll_addr_len;
        !           111:        }
        !           112:        if ( setting_cmp ( setting, &busid_setting ) == 0 ) {
        !           113:                dhcp_desc.type = desc->bus_type;
        !           114:                dhcp_desc.vendor = htons ( desc->vendor );
        !           115:                dhcp_desc.device = htons ( desc->device );
        !           116:                if ( len > sizeof ( dhcp_desc ) )
        !           117:                        len = sizeof ( dhcp_desc );
        !           118:                memcpy ( data, &dhcp_desc, len );
        !           119:                return sizeof ( dhcp_desc );
        !           120:        }
        !           121: 
        !           122:        return generic_settings_fetch ( settings, setting, data, len );
        !           123: }
        !           124: 
        !           125: /**
        !           126:  * Clear network device settings
        !           127:  *
        !           128:  * @v settings         Settings block
        !           129:  */
        !           130: static void netdev_clear ( struct settings *settings ) {
        !           131:        generic_settings_clear ( settings );
        !           132: }
        !           133: 
        !           134: /** Network device configuration settings operations */
        !           135: struct settings_operations netdev_settings_operations = {
        !           136:        .applies = netdev_applies,
        !           137:        .store = netdev_store,
        !           138:        .fetch = netdev_fetch,
        !           139:        .clear = netdev_clear,
        !           140: };

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