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/*
* Copyright (C) 2013 Marin Hannache <ipxe@mareo.fr>.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/socket.h>
#include <ipxe/tcpip.h>
#include <ipxe/in.h>
#include <ipxe/iobuf.h>
#include <ipxe/dhcp.h>
#include <ipxe/xfer.h>
#include <ipxe/open.h>
#include <ipxe/uri.h>
#include <ipxe/features.h>
#include <ipxe/oncrpc.h>
#include <ipxe/oncrpc_iob.h>
#include <ipxe/init.h>
#include <ipxe/settings.h>
#include <ipxe/version.h>
/** @file
*
* SUN ONC RPC protocol
*
*/
/** Set most significant bit to 1. */
#define SET_LAST_FRAME( x ) ( (x) | 1 << 31 )
#define GET_FRAME_SIZE( x ) ( (x) & ~( 1 << 31 ) )
#define ONCRPC_CALL 0
#define ONCRPC_REPLY 1
/** AUTH NONE authentication flavor */
struct oncrpc_cred oncrpc_auth_none = {
.flavor = ONCRPC_AUTH_NONE,
.length = 0
};
const struct setting uid_setting __setting ( SETTING_AUTH, uid ) = {
.name = "uid",
.description = "User ID",
.tag = DHCP_EB_UID,
.type = &setting_type_uint32
};
const struct setting gid_setting __setting ( SETTING_AUTH, gid ) = {
.name = "gid",
.description = "Group ID",
.tag = DHCP_EB_GID,
.type = &setting_type_uint32
};
/**
* Initialize an ONC RPC AUTH SYS credential structure
*
* @v auth_sys The structure to initialize
*
* The hostname field is filled with the value of the hostname setting, if the
* hostname setting is empty, PRODUCT_SHORT_NAME (usually "iPXE") is used
* instead.
*/
int oncrpc_init_cred_sys ( struct oncrpc_cred_sys *auth_sys ) {
if ( ! auth_sys )
return -EINVAL;
fetch_string_setting_copy ( NULL, &hostname_setting,
&auth_sys->hostname );
if ( ! auth_sys->hostname )
if ( ! ( auth_sys->hostname = strdup ( product_short_name ) ) )
return -ENOMEM;
auth_sys->uid = fetch_uintz_setting ( NULL, &uid_setting );
auth_sys->gid = fetch_uintz_setting ( NULL, &uid_setting );
auth_sys->aux_gid_len = 0;
auth_sys->stamp = 0;
auth_sys->credential.flavor = ONCRPC_AUTH_SYS;
auth_sys->credential.length = 16 +
oncrpc_strlen ( auth_sys->hostname );
return 0;
}
/**
* Prepare an ONC RPC session structure to be used by the ONC RPC layer
*
* @v session ONC RPC session
* @v credential Credential structure pointer
* @v verifier Verifier structure pointer
* @v prog_name ONC RPC program number
* @v prog_vers ONC RPC program version number
*/
void oncrpc_init_session ( struct oncrpc_session *session,
struct oncrpc_cred *credential,
struct oncrpc_cred *verifier, uint32_t prog_name,
uint32_t prog_vers ) {
if ( ! session )
return;
session->rpc_id = rand();
session->credential = credential;
session->verifier = verifier;
session->prog_name = prog_name;
session->prog_vers = prog_vers;
}
int oncrpc_call ( struct interface *intf, struct oncrpc_session *session,
uint32_t proc_name, const struct oncrpc_field fields[] ) {
int rc;
size_t frame_size;
struct io_buffer *io_buf;
if ( ! session )
return -EINVAL;
struct oncrpc_field header[] = {
ONCRPC_FIELD ( int32, 0 ),
ONCRPC_FIELD ( int32, ++session->rpc_id ),
ONCRPC_FIELD ( int32, ONCRPC_CALL ),
ONCRPC_FIELD ( int32, ONCRPC_VERS ),
ONCRPC_FIELD ( int32, session->prog_name ),
ONCRPC_FIELD ( int32, session->prog_vers ),
ONCRPC_FIELD ( int32, proc_name ),
ONCRPC_FIELD ( cred, session->credential ),
ONCRPC_FIELD ( cred, session->verifier ),
ONCRPC_FIELD_END,
};
frame_size = oncrpc_compute_size ( header );
frame_size += oncrpc_compute_size ( fields );
io_buf = alloc_iob ( frame_size );
if ( ! io_buf )
return -ENOBUFS;
header[0].value.int32 = SET_LAST_FRAME ( frame_size -
sizeof ( uint32_t ) );
oncrpc_iob_add_fields ( io_buf, header );
oncrpc_iob_add_fields ( io_buf, fields );
rc = xfer_deliver_iob ( intf, io_buf );
if ( rc != 0 )
free_iob ( io_buf );
return rc;
}
size_t oncrpc_compute_size ( const struct oncrpc_field fields[] ) {
size_t i;
size_t size = 0;
for ( i = 0; fields[i].type != oncrpc_none; i++ ) {
switch ( fields[i].type ) {
case oncrpc_int32:
size += sizeof ( uint32_t );
break;
case oncrpc_int64:
size += sizeof ( uint64_t );
break;
case oncrpc_str:
size += oncrpc_strlen ( fields[i].value.str );
break;
case oncrpc_array:
size += oncrpc_align ( fields[i].value.array.length );
size += sizeof ( uint32_t );
break;
case oncrpc_intarray:
size += sizeof ( uint32_t ) *
fields[i].value.intarray.length;
size += sizeof ( uint32_t );
break;
case oncrpc_cred:
size += fields[i].value.cred->length;
size += 2 * sizeof ( uint32_t );
break;
default:
return size;
}
}
return size;
}
/**
* Parse an I/O buffer to extract a ONC RPC REPLY
* @v session ONC RPC session
* @v reply Reply structure where data will be saved
* @v io_buf I/O buffer
*/
int oncrpc_get_reply ( struct oncrpc_session *session __unused,
struct oncrpc_reply *reply, struct io_buffer *io_buf ) {
if ( ! reply || ! io_buf )
return -EINVAL;
reply->frame_size = GET_FRAME_SIZE ( oncrpc_iob_get_int ( io_buf ) );
reply->rpc_id = oncrpc_iob_get_int ( io_buf );
/* iPXE has no support for handling ONC RPC call */
if ( oncrpc_iob_get_int ( io_buf ) != ONCRPC_REPLY )
return -ENOSYS;
reply->reply_state = oncrpc_iob_get_int ( io_buf );
if ( reply->reply_state == 0 )
{
/* verifier.flavor */
oncrpc_iob_get_int ( io_buf );
/* verifier.length */
iob_pull ( io_buf, oncrpc_iob_get_int ( io_buf ));
/* We don't use the verifier in iPXE, let it be an empty
verifier. */
reply->verifier = &oncrpc_auth_none;
}
reply->accept_state = oncrpc_iob_get_int ( io_buf );
reply->data = io_buf;
return 0;
}
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