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- /*
- * 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.
- */
-
- #include <stdint.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <strings.h>
- #include <byteswap.h>
- #include <errno.h>
- #include <assert.h>
- #include <gpxe/in.h>
- #include <gpxe/vsprintf.h>
- #include <gpxe/dhcp.h>
- #include <gpxe/uuid.h>
- #include <gpxe/settings.h>
-
- /** @file
- *
- * Configuration settings
- *
- */
-
- /** Registered settings */
- static struct setting settings[0]
- __table_start ( struct setting, settings );
- static struct setting settings_end[0]
- __table_end ( struct setting, settings );
-
- /** Registered setting types */
- static struct setting_type setting_types[0]
- __table_start ( struct setting_type, setting_types );
- static struct setting_type setting_types_end[0]
- __table_end ( struct setting_type, setting_types );
-
- /** Registered settings applicators */
- static struct settings_applicator settings_applicators[0]
- __table_start ( struct settings_applicator, settings_applicators );
- static struct settings_applicator settings_applicators_end[0]
- __table_end ( struct settings_applicator, settings_applicators );
-
- /******************************************************************************
- *
- * Registered settings blocks
- *
- ******************************************************************************
- */
-
- /**
- * Store value of simple setting
- *
- * @v options DHCP option block
- * @v setting Setting to store
- * @v data Setting data, or NULL to clear setting
- * @v len Length of setting data
- * @ret rc Return status code
- */
- int simple_settings_store ( struct settings *settings, struct setting *setting,
- const void *data, size_t len ) {
- struct simple_settings *simple =
- container_of ( settings, struct simple_settings, settings );
- return dhcpopt_extensible_store ( &simple->dhcpopts, setting->tag,
- data, len );
- }
-
- /**
- * Fetch value of simple setting
- *
- * @v options DHCP option block
- * @v setting Setting to fetch
- * @v data Buffer to fill with setting data
- * @v len Length of buffer
- * @ret len Length of setting data, or negative error
- */
- int simple_settings_fetch ( struct settings *settings, struct setting *setting,
- void *data, size_t len ) {
- struct simple_settings *simple =
- container_of ( settings, struct simple_settings, settings );
- return dhcpopt_fetch ( &simple->dhcpopts, setting->tag, data, len );
- }
-
- /** Simple settings operations */
- struct settings_operations simple_settings_operations = {
- .store = simple_settings_store,
- .fetch = simple_settings_fetch,
- };
-
- /** Root simple settings block */
- struct simple_settings simple_settings_root = {
- .settings = {
- .refcnt = NULL,
- .name = "",
- .siblings =
- LIST_HEAD_INIT ( simple_settings_root.settings.siblings ),
- .children =
- LIST_HEAD_INIT ( simple_settings_root.settings.children ),
- .op = &simple_settings_operations,
- },
- };
-
- /** Root settings block */
- #define settings_root simple_settings_root.settings
-
- /**
- * Apply all settings
- *
- * @ret rc Return status code
- */
- static int apply_settings ( void ) {
- struct settings_applicator *applicator;
- int rc;
-
- /* Call all settings applicators */
- for ( applicator = settings_applicators ;
- applicator < settings_applicators_end ; applicator++ ) {
- if ( ( rc = applicator->apply() ) != 0 ) {
- DBG ( "Could not apply settings using applicator "
- "%p: %s\n", applicator, strerror ( rc ) );
- return rc;
- }
- }
-
- return 0;
- }
-
- /**
- * Reprioritise settings
- *
- * @v settings Settings block
- *
- * Reorders the settings block amongst its siblings according to its
- * priority.
- */
- static void reprioritise_settings ( struct settings *settings ) {
- struct settings *parent = settings->parent;
- long priority;
- struct settings *tmp;
- long tmp_priority;
-
- /* Stop when we reach the top of the tree */
- if ( ! parent )
- return;
-
- /* Read priority, if present */
- priority = fetch_intz_setting ( settings, &priority_setting );
-
- /* Remove from siblings list */
- list_del ( &settings->siblings );
-
- /* Reinsert after any existing blocks which have a higher priority */
- list_for_each_entry ( tmp, &parent->children, siblings ) {
- tmp_priority = fetch_intz_setting ( tmp, &priority_setting );
- if ( priority > tmp_priority )
- break;
- }
- list_add_tail ( &settings->siblings, &tmp->siblings );
-
- /* Recurse up the tree */
- reprioritise_settings ( parent );
- }
-
- /**
- * Register settings block
- *
- * @v settings Settings block
- * @v parent Parent settings block, or NULL
- * @ret rc Return status code
- */
- int register_settings ( struct settings *settings, struct settings *parent ) {
-
- /* NULL parent => add to settings root */
- assert ( settings != NULL );
- if ( parent == NULL )
- parent = &settings_root;
-
- /* Add to list of settings */
- ref_get ( settings->refcnt );
- ref_get ( parent->refcnt );
- settings->parent = parent;
- list_add_tail ( &settings->siblings, &parent->children );
- DBGC ( settings, "Settings %p registered\n", settings );
-
- /* Fix up settings priority */
- reprioritise_settings ( settings );
-
- /* Apply potentially-updated settings */
- apply_settings();
-
- return 0;
- }
-
- /**
- * Unregister settings block
- *
- * @v settings Settings block
- */
- void unregister_settings ( struct settings *settings ) {
-
- /* Remove from list of settings */
- ref_put ( settings->refcnt );
- ref_put ( settings->parent->refcnt );
- settings->parent = NULL;
- list_del ( &settings->siblings );
- DBGC ( settings, "Settings %p unregistered\n", settings );
-
- /* Apply potentially-updated settings */
- apply_settings();
- }
-
- /**
- * Find child named settings block
- *
- * @v parent Parent settings block
- * @v name Name within this parent
- * @ret settings Settings block, or NULL
- */
- struct settings * find_child_settings ( struct settings *parent,
- const char *name ) {
- struct settings *settings;
- size_t len;
-
- /* NULL parent => add to settings root */
- if ( parent == NULL )
- parent = &settings_root;
-
- /* Look for a child whose name matches the initial component */
- list_for_each_entry ( settings, &parent->children, siblings ) {
- len = strlen ( settings->name );
- if ( strncmp ( name, settings->name, len ) != 0 )
- continue;
- if ( name[len] == 0 )
- return settings;
- if ( name[len] == '.' )
- return find_child_settings ( settings,
- ( name + len + 1 ) );
- }
-
- return NULL;
- }
-
- /**
- * Find named settings block
- *
- * @v name Name
- * @ret settings Settings block, or NULL
- */
- struct settings * find_settings ( const char *name ) {
-
- /* If name is empty, use the root */
- if ( ! *name )
- return &settings_root;
-
- return find_child_settings ( &settings_root, name );
- }
-
- /******************************************************************************
- *
- * Core settings routines
- *
- ******************************************************************************
- */
-
- /**
- * Store value of setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v data Setting data, or NULL to clear setting
- * @v len Length of setting data
- * @ret rc Return status code
- */
- int store_setting ( struct settings *settings, struct setting *setting,
- const void *data, size_t len ) {
- int rc;
-
- /* Sanity check */
- if ( ! settings )
- return -ENODEV;
-
- /* Store setting */
- if ( ( rc = settings->op->store ( settings, setting,
- data, len ) ) != 0 )
- return rc;
-
- /* Reprioritise settings if necessary */
- if ( setting_cmp ( setting, &priority_setting ) == 0 )
- reprioritise_settings ( settings );
-
- /* If these settings are registered, apply potentially-updated
- * settings
- */
- for ( ; settings ; settings = settings->parent ) {
- if ( settings == &settings_root ) {
- if ( ( rc = apply_settings() ) != 0 )
- return rc;
- break;
- }
- }
-
- return 0;
- }
-
- /**
- * Fetch value of setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v data Buffer to fill with setting data
- * @v len Length of buffer
- * @ret len Length of setting data, or negative error
- *
- * The actual length of the setting will be returned even if
- * the buffer was too small.
- */
- int fetch_setting ( struct settings *settings, struct setting *setting,
- void *data, size_t len ) {
- struct settings *child;
- int ret;
-
- /* NULL settings implies starting at the global settings root */
- if ( ! settings )
- settings = &settings_root;
-
- /* Try this block first */
- if ( ( ret = settings->op->fetch ( settings, setting,
- data, len ) ) >= 0 )
- return ret;
-
- /* Recurse into each child block in turn */
- list_for_each_entry ( child, &settings->children, siblings ) {
- if ( ( ret = fetch_setting ( child, setting,
- data, len ) ) >= 0 )
- return ret;
- }
-
- return -ENOENT;
- }
-
- /**
- * Fetch length of setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @ret len Length of setting data, or negative error
- *
- * This function can also be used as an existence check for the
- * setting.
- */
- int fetch_setting_len ( struct settings *settings, struct setting *setting ) {
- return fetch_setting ( settings, setting, NULL, 0 );
- }
-
- /**
- * Fetch value of string setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v data Buffer to fill with setting string data
- * @v len Length of buffer
- * @ret len Length of string setting, or negative error
- *
- * The resulting string is guaranteed to be correctly NUL-terminated.
- * The returned length will be the length of the underlying setting
- * data.
- */
- int fetch_string_setting ( struct settings *settings, struct setting *setting,
- char *data, size_t len ) {
- memset ( data, 0, len );
- return fetch_setting ( settings, setting, data,
- ( ( len > 0 ) ? ( len - 1 ) : 0 ) );
- }
-
- /**
- * Fetch value of IPv4 address setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v inp IPv4 address to fill in
- * @ret len Length of setting, or negative error
- */
- int fetch_ipv4_setting ( struct settings *settings, struct setting *setting,
- struct in_addr *inp ) {
- int len;
-
- len = fetch_setting ( settings, setting, inp, sizeof ( *inp ) );
- if ( len < 0 )
- return len;
- if ( len < ( int ) sizeof ( *inp ) )
- return -ERANGE;
- return len;
- }
-
- /**
- * Fetch value of signed integer setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v value Integer value to fill in
- * @ret len Length of setting, or negative error
- */
- int fetch_int_setting ( struct settings *settings, struct setting *setting,
- long *value ) {
- union {
- long value;
- uint8_t u8[ sizeof ( long ) ];
- int8_t s8[ sizeof ( long ) ];
- } buf;
- int len;
- int i;
-
- buf.value = 0;
- len = fetch_setting ( settings, setting, &buf, sizeof ( buf ) );
- if ( len < 0 )
- return len;
- if ( len > ( int ) sizeof ( buf ) )
- return -ERANGE;
-
- *value = ( ( buf.s8[0] >= 0 ) ? 0 : -1L );
- for ( i = 0 ; i < len ; i++ ) {
- *value = ( ( *value << 8 ) | buf.u8[i] );
- }
-
- return len;
- }
-
- /**
- * Fetch value of unsigned integer setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v value Integer value to fill in
- * @ret len Length of setting, or negative error
- */
- int fetch_uint_setting ( struct settings *settings, struct setting *setting,
- unsigned long *value ) {
- long svalue;
- int len;
-
- len = fetch_int_setting ( settings, setting, &svalue );
- if ( len < 0 )
- return len;
-
- *value = ( svalue & ( -1UL >> ( sizeof ( long ) - len ) ) );
-
- return len;
- }
-
- /**
- * Fetch value of signed integer setting, or zero
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @ret value Setting value, or zero
- */
- long fetch_intz_setting ( struct settings *settings, struct setting *setting ){
- long value = 0;
-
- fetch_int_setting ( settings, setting, &value );
- return value;
- }
-
- /**
- * Fetch value of unsigned integer setting, or zero
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @ret value Setting value, or zero
- */
- unsigned long fetch_uintz_setting ( struct settings *settings,
- struct setting *setting ) {
- unsigned long value = 0;
-
- fetch_uint_setting ( settings, setting, &value );
- return value;
- }
-
- /**
- * Fetch value of UUID setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v uuid UUID to fill in
- * @ret len Length of setting, or negative error
- */
- int fetch_uuid_setting ( struct settings *settings, struct setting *setting,
- union uuid *uuid ) {
- int len;
-
- len = fetch_setting ( settings, setting, uuid, sizeof ( *uuid ) );
- if ( len < 0 )
- return len;
- if ( len != sizeof ( *uuid ) )
- return -ERANGE;
- return len;
- }
-
- /**
- * Compare two settings
- *
- * @v a Setting to compare
- * @v b Setting to compare
- * @ret 0 Settings are the same
- * @ret non-zero Settings are not the same
- */
- int setting_cmp ( struct setting *a, struct setting *b ) {
-
- /* If the settings have tags, compare them */
- if ( a->tag && ( a->tag == b->tag ) )
- return 0;
-
- /* Otherwise, compare the names */
- return strcmp ( a->name, b->name );
- }
-
- /******************************************************************************
- *
- * Formatted setting routines
- *
- ******************************************************************************
- */
-
- /**
- * Store value of typed setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v type Settings type
- * @v value Formatted setting data, or NULL
- * @ret rc Return status code
- */
- int storef_setting ( struct settings *settings, struct setting *setting,
- const char *value ) {
-
- /* NULL value implies deletion. Avoid imposing the burden of
- * checking for NULL values on each typed setting's storef()
- * method.
- */
- if ( ! value )
- return delete_setting ( settings, setting );
-
- return setting->type->storef ( settings, setting, value );
- }
-
- /**
- * Find named setting
- *
- * @v name Name
- * @ret setting Named setting, or NULL
- */
- static struct setting * find_setting ( const char *name ) {
- struct setting *setting;
-
- for ( setting = settings ; setting < settings_end ; setting++ ) {
- if ( strcmp ( name, setting->name ) == 0 )
- return setting;
- }
- return NULL;
- }
-
- /**
- * Find setting type
- *
- * @v name Name
- * @ret type Setting type, or NULL
- */
- static struct setting_type * find_setting_type ( const char *name ) {
- struct setting_type *type;
-
- for ( type = setting_types ; type < setting_types_end ; type++ ) {
- if ( strcmp ( name, type->name ) == 0 )
- return type;
- }
- return NULL;
- }
-
- /**
- * Parse setting name
- *
- * @v name Name of setting
- * @v settings Settings block to fill in
- * @v setting Setting to fill in
- * @ret rc Return status code
- *
- * Interprets a name of the form
- * "[settings_name/]tag_name[:type_name]" and fills in the appropriate
- * fields.
- */
- static int parse_setting_name ( const char *name, struct settings **settings,
- struct setting *setting ) {
- char tmp_name[ strlen ( name ) + 1 ];
- char *settings_name;
- char *setting_name;
- char *type_name;
- struct setting *named_setting;
- char *tmp;
-
- /* Set defaults */
- *settings = &settings_root;
- memset ( setting, 0, sizeof ( *setting ) );
- setting->type = &setting_type_hex;
-
- /* Split name into "[settings_name/]setting_name[:type_name]" */
- memcpy ( tmp_name, name, sizeof ( tmp_name ) );
- if ( ( setting_name = strchr ( tmp_name, '/' ) ) != NULL ) {
- *(setting_name++) = 0;
- settings_name = tmp_name;
- } else {
- setting_name = tmp_name;
- settings_name = NULL;
- }
- if ( ( type_name = strchr ( setting_name, ':' ) ) != NULL )
- *(type_name++) = 0;
-
- /* Identify settings block, if specified */
- if ( settings_name ) {
- *settings = find_settings ( settings_name );
- if ( *settings == NULL ) {
- DBG ( "Unrecognised settings block \"%s\" in \"%s\"\n",
- settings_name, name );
- return -ENODEV;
- }
- }
-
- /* Identify tag number */
- if ( ( named_setting = find_setting ( setting_name ) ) != NULL ) {
- memcpy ( setting, named_setting, sizeof ( *setting ) );
- } else {
- /* Unrecognised name: try to interpret as a tag number */
- tmp = setting_name;
- while ( 1 ) {
- setting->tag = ( ( setting->tag << 8 ) |
- strtoul ( tmp, &tmp, 0 ) );
- if ( *tmp == 0 )
- break;
- if ( *tmp != '.' ) {
- DBG ( "Invalid setting \"%s\" in \"%s\"\n",
- setting_name, name );
- return -ENOENT;
- }
- tmp++;
- }
- }
-
- /* Identify setting type, if specified */
- if ( type_name ) {
- setting->type = find_setting_type ( type_name );
- if ( setting->type == NULL ) {
- DBG ( "Invalid setting type \"%s\" in \"%s\"\n",
- type_name, name );
- return -ENOTSUP;
- }
- }
-
- return 0;
- }
-
- /**
- * Parse and store value of named setting
- *
- * @v name Name of setting
- * @v value Formatted setting data, or NULL
- * @ret rc Return status code
- */
- int storef_named_setting ( const char *name, const char *value ) {
- struct settings *settings;
- struct setting setting;
- int rc;
-
- if ( ( rc = parse_setting_name ( name, &settings, &setting ) ) != 0 )
- return rc;
- return storef_setting ( settings, &setting, value );
- }
-
- /**
- * Fetch and format value of named setting
- *
- * @v name Name of setting
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- int fetchf_named_setting ( const char *name, char *buf, size_t len ) {
- struct settings *settings;
- struct setting setting;
- int rc;
-
- if ( ( rc = parse_setting_name ( name, &settings, &setting ) ) != 0 )
- return rc;
- return fetchf_setting ( settings, &setting, buf, len );
- }
-
- /******************************************************************************
- *
- * Setting types
- *
- ******************************************************************************
- */
-
- /**
- * Parse and store value of string setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @ret rc Return status code
- */
- static int storef_string ( struct settings *settings, struct setting *setting,
- const char *value ) {
- return store_setting ( settings, setting, value, strlen ( value ) );
- }
-
- /**
- * Fetch and format value of string setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_string ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- return fetch_string_setting ( settings, setting, buf, len );
- }
-
- /** A string setting type */
- struct setting_type setting_type_string __setting_type = {
- .name = "string",
- .storef = storef_string,
- .fetchf = fetchf_string,
- };
-
- /**
- * Parse and store value of IPv4 address setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @ret rc Return status code
- */
- static int storef_ipv4 ( struct settings *settings, struct setting *setting,
- const char *value ) {
- struct in_addr ipv4;
-
- if ( inet_aton ( value, &ipv4 ) == 0 )
- return -EINVAL;
- return store_setting ( settings, setting, &ipv4, sizeof ( ipv4 ) );
- }
-
- /**
- * Fetch and format value of IPv4 address setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_ipv4 ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- struct in_addr ipv4;
- int raw_len;
-
- if ( ( raw_len = fetch_ipv4_setting ( settings, setting, &ipv4 ) ) < 0)
- return raw_len;
- return snprintf ( buf, len, "%s", inet_ntoa ( ipv4 ) );
- }
-
- /** An IPv4 address setting type */
- struct setting_type setting_type_ipv4 __setting_type = {
- .name = "ipv4",
- .storef = storef_ipv4,
- .fetchf = fetchf_ipv4,
- };
-
- /**
- * Parse and store value of integer setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @v size Integer size, in bytes
- * @ret rc Return status code
- */
- static int storef_int ( struct settings *settings, struct setting *setting,
- const char *value, unsigned int size ) {
- union {
- uint32_t num;
- uint8_t bytes[4];
- } u;
- char *endp;
-
- u.num = htonl ( strtoul ( value, &endp, 0 ) );
- if ( *endp )
- return -EINVAL;
- return store_setting ( settings, setting,
- &u.bytes[ sizeof ( u ) - size ], size );
- }
-
- /**
- * Parse and store value of 8-bit integer setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @v size Integer size, in bytes
- * @ret rc Return status code
- */
- static int storef_int8 ( struct settings *settings, struct setting *setting,
- const char *value ) {
- return storef_int ( settings, setting, value, 1 );
- }
-
- /**
- * Parse and store value of 16-bit integer setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @v size Integer size, in bytes
- * @ret rc Return status code
- */
- static int storef_int16 ( struct settings *settings, struct setting *setting,
- const char *value ) {
- return storef_int ( settings, setting, value, 2 );
- }
-
- /**
- * Parse and store value of 32-bit integer setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @v size Integer size, in bytes
- * @ret rc Return status code
- */
- static int storef_int32 ( struct settings *settings, struct setting *setting,
- const char *value ) {
- return storef_int ( settings, setting, value, 4 );
- }
-
- /**
- * Fetch and format value of signed integer setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_int ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- long value;
- int rc;
-
- if ( ( rc = fetch_int_setting ( settings, setting, &value ) ) < 0 )
- return rc;
- return snprintf ( buf, len, "%ld", value );
- }
-
- /**
- * Fetch and format value of unsigned integer setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_uint ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- unsigned long value;
- int rc;
-
- if ( ( rc = fetch_uint_setting ( settings, setting, &value ) ) < 0 )
- return rc;
- return snprintf ( buf, len, "%#lx", value );
- }
-
- /** A signed 8-bit integer setting type */
- struct setting_type setting_type_int8 __setting_type = {
- .name = "int8",
- .storef = storef_int8,
- .fetchf = fetchf_int,
- };
-
- /** A signed 16-bit integer setting type */
- struct setting_type setting_type_int16 __setting_type = {
- .name = "int16",
- .storef = storef_int16,
- .fetchf = fetchf_int,
- };
-
- /** A signed 32-bit integer setting type */
- struct setting_type setting_type_int32 __setting_type = {
- .name = "int32",
- .storef = storef_int32,
- .fetchf = fetchf_int,
- };
-
- /** An unsigned 8-bit integer setting type */
- struct setting_type setting_type_uint8 __setting_type = {
- .name = "uint8",
- .storef = storef_int8,
- .fetchf = fetchf_uint,
- };
-
- /** An unsigned 16-bit integer setting type */
- struct setting_type setting_type_uint16 __setting_type = {
- .name = "uint16",
- .storef = storef_int16,
- .fetchf = fetchf_uint,
- };
-
- /** An unsigned 32-bit integer setting type */
- struct setting_type setting_type_uint32 __setting_type = {
- .name = "uint32",
- .storef = storef_int32,
- .fetchf = fetchf_uint,
- };
-
- /**
- * Parse and store value of hex string setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @ret rc Return status code
- */
- static int storef_hex ( struct settings *settings, struct setting *setting,
- const char *value ) {
- char *ptr = ( char * ) value;
- uint8_t bytes[ strlen ( value ) ]; /* cannot exceed strlen(value) */
- unsigned int len = 0;
-
- while ( 1 ) {
- bytes[len++] = strtoul ( ptr, &ptr, 16 );
- switch ( *ptr ) {
- case '\0' :
- return store_setting ( settings, setting, bytes, len );
- case ':' :
- ptr++;
- break;
- default :
- return -EINVAL;
- }
- }
- }
-
- /**
- * Fetch and format value of hex string setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_hex ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- int raw_len;
- int check_len;
- int used = 0;
- int i;
-
- raw_len = fetch_setting_len ( settings, setting );
- if ( raw_len < 0 )
- return raw_len;
-
- {
- uint8_t raw[raw_len];
-
- check_len = fetch_setting ( settings, setting, raw,
- sizeof ( raw ) );
- assert ( check_len == raw_len );
-
- if ( len )
- buf[0] = 0; /* Ensure that a terminating NUL exists */
- for ( i = 0 ; i < raw_len ; i++ ) {
- used += ssnprintf ( ( buf + used ), ( len - used ),
- "%s%02x", ( used ? ":" : "" ),
- raw[i] );
- }
- return used;
- }
- }
-
- /** A hex-string setting */
- struct setting_type setting_type_hex __setting_type = {
- .name = "hex",
- .storef = storef_hex,
- .fetchf = fetchf_hex,
- };
-
- /**
- * Parse and store value of UUID setting
- *
- * @v settings Settings block
- * @v setting Setting to store
- * @v value Formatted setting data
- * @ret rc Return status code
- */
- static int storef_uuid ( struct settings *settings __unused,
- struct setting *setting __unused,
- const char *value __unused ) {
- return -ENOTSUP;
- }
-
- /**
- * Fetch and format value of UUID setting
- *
- * @v settings Settings block, or NULL to search all blocks
- * @v setting Setting to fetch
- * @v buf Buffer to contain formatted value
- * @v len Length of buffer
- * @ret len Length of formatted value, or negative error
- */
- static int fetchf_uuid ( struct settings *settings, struct setting *setting,
- char *buf, size_t len ) {
- union uuid uuid;
- int raw_len;
-
- if ( ( raw_len = fetch_uuid_setting ( settings, setting, &uuid ) ) < 0)
- return raw_len;
- return snprintf ( buf, len, "%s", uuid_ntoa ( &uuid ) );
- }
-
- /** UUID setting type */
- struct setting_type setting_type_uuid __setting_type = {
- .name = "uuid",
- .storef = storef_uuid,
- .fetchf = fetchf_uuid,
- };
-
- /******************************************************************************
- *
- * Settings
- *
- ******************************************************************************
- */
-
- /** Hostname setting */
- struct setting hostname_setting __setting = {
- .name = "hostname",
- .description = "Host name",
- .tag = DHCP_HOST_NAME,
- .type = &setting_type_string,
- };
-
- /** Filename setting */
- struct setting filename_setting __setting = {
- .name = "filename",
- .description = "Boot filename",
- .tag = DHCP_BOOTFILE_NAME,
- .type = &setting_type_string,
- };
-
- /** Root path setting */
- struct setting root_path_setting __setting = {
- .name = "root-path",
- .description = "NFS/iSCSI root path",
- .tag = DHCP_ROOT_PATH,
- .type = &setting_type_string,
- };
-
- /** Username setting */
- struct setting username_setting __setting = {
- .name = "username",
- .description = "User name",
- .tag = DHCP_EB_USERNAME,
- .type = &setting_type_string,
- };
-
- /** Password setting */
- struct setting password_setting __setting = {
- .name = "password",
- .description = "Password",
- .tag = DHCP_EB_PASSWORD,
- .type = &setting_type_string,
- };
-
- /** Priority setting */
- struct setting priority_setting __setting = {
- .name = "priority",
- .description = "Priority of these settings",
- .tag = DHCP_EB_PRIORITY,
- .type = &setting_type_int8,
- };
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