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/*
* Copyright (C) 2007 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <ipxe/xfer.h>
#include <ipxe/uri.h>
#include <ipxe/socket.h>
#include <ipxe/open.h>
/** @file
*
* Data transfer interface opening
*
*/
/**
* Find opener for URI scheme
*
* @v scheme URI scheme
* @ret opener Opener, or NULL
*/
struct uri_opener * xfer_uri_opener ( const char *scheme ) {
struct uri_opener *opener;
for_each_table_entry ( opener, URI_OPENERS ) {
if ( strcmp ( scheme, opener->scheme ) == 0 )
return opener;
}
return NULL;
}
/**
* Open URI
*
* @v intf Data transfer interface
* @v uri URI
* @ret rc Return status code
*
* The URI will be regarded as being relative to the current working
* URI (see churi()).
*/
int xfer_open_uri ( struct interface *intf, struct uri *uri ) {
struct uri_opener *opener;
struct uri *resolved_uri;
int rc;
/* Resolve URI */
resolved_uri = resolve_uri ( cwuri, uri );
if ( ! resolved_uri ) {
rc = -ENOMEM;
goto err_resolve_uri;
}
/* Find opener which supports this URI scheme */
opener = xfer_uri_opener ( resolved_uri->scheme );
if ( ! opener ) {
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " attempted to open "
"unsupported URI scheme \"%s\"\n",
INTF_DBG ( intf ), resolved_uri->scheme );
rc = -ENOTSUP;
goto err_opener;
}
/* Call opener */
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " opening %s URI\n",
INTF_DBG ( intf ), resolved_uri->scheme );
if ( ( rc = opener->open ( intf, resolved_uri ) ) != 0 ) {
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " could not open: "
"%s\n", INTF_DBG ( intf ), strerror ( rc ) );
goto err_open;
}
err_open:
err_opener:
uri_put ( resolved_uri );
err_resolve_uri:
return rc;
}
/**
* Open URI string
*
* @v intf Data transfer interface
* @v uri_string URI string (e.g. "http://ipxe.org/kernel")
* @ret rc Return status code
*
* The URI will be regarded as being relative to the current working
* URI (see churi()).
*/
int xfer_open_uri_string ( struct interface *intf,
const char *uri_string ) {
struct uri *uri;
int rc;
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " opening URI %s\n",
INTF_DBG ( intf ), uri_string );
uri = parse_uri ( uri_string );
if ( ! uri )
return -ENOMEM;
rc = xfer_open_uri ( intf, uri );
uri_put ( uri );
return rc;
}
/**
* Open socket
*
* @v intf Data transfer interface
* @v semantics Communication semantics (e.g. SOCK_STREAM)
* @v peer Peer socket address
* @v local Local socket address, or NULL
* @ret rc Return status code
*/
int xfer_open_socket ( struct interface *intf, int semantics,
struct sockaddr *peer, struct sockaddr *local ) {
struct socket_opener *opener;
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " opening (%s,%s) socket\n",
INTF_DBG ( intf ), socket_semantics_name ( semantics ),
socket_family_name ( peer->sa_family ) );
for_each_table_entry ( opener, SOCKET_OPENERS ) {
if ( ( opener->semantics == semantics ) &&
( opener->family == peer->sa_family ) ) {
return opener->open ( intf, peer, local );
}
}
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " attempted to open "
"unsupported socket type (%s,%s)\n",
INTF_DBG ( intf ), socket_semantics_name ( semantics ),
socket_family_name ( peer->sa_family ) );
return -ENOTSUP;
}
/**
* Open location
*
* @v intf Data transfer interface
* @v type Location type
* @v args Remaining arguments depend upon location type
* @ret rc Return status code
*/
int xfer_vopen ( struct interface *intf, int type, va_list args ) {
switch ( type ) {
case LOCATION_URI_STRING: {
const char *uri_string = va_arg ( args, const char * );
return xfer_open_uri_string ( intf, uri_string ); }
case LOCATION_URI: {
struct uri *uri = va_arg ( args, struct uri * );
return xfer_open_uri ( intf, uri ); }
case LOCATION_SOCKET: {
int semantics = va_arg ( args, int );
struct sockaddr *peer = va_arg ( args, struct sockaddr * );
struct sockaddr *local = va_arg ( args, struct sockaddr * );
return xfer_open_socket ( intf, semantics, peer, local ); }
default:
DBGC ( INTF_COL ( intf ), "INTF " INTF_FMT " attempted to "
"open unsupported location type %d\n",
INTF_DBG ( intf ), type );
return -ENOTSUP;
}
}
/**
* Open location
*
* @v intf Data transfer interface
* @v type Location type
* @v ... Remaining arguments depend upon location type
* @ret rc Return status code
*/
int xfer_open ( struct interface *intf, int type, ... ) {
va_list args;
int rc;
va_start ( args, type );
rc = xfer_vopen ( intf, type, args );
va_end ( args );
return rc;
}
/**
* Reopen location
*
* @v intf Data transfer interface
* @v type Location type
* @v args Remaining arguments depend upon location type
* @ret rc Return status code
*
* This will close the existing connection and open a new connection
* using xfer_vopen(). It is intended to be used as a .vredirect
* method handler.
*/
int xfer_vreopen ( struct interface *intf, int type, va_list args ) {
/* Close existing connection */
intf_restart ( intf, 0 );
/* Open new location */
return xfer_vopen ( intf, type, args );
}
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