198 lines
5.1 KiB
C
198 lines
5.1 KiB
C
/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <ipxe/xfer.h>
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#include <ipxe/uri.h>
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#include <ipxe/socket.h>
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#include <ipxe/open.h>
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/** @file
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*
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* Data transfer interface opening
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*
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*/
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/**
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* Open URI
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*
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* @v xfer Data transfer interface
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* @v uri URI
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* @ret rc Return status code
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*
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* The URI will be regarded as being relative to the current working
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* URI (see churi()).
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*/
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int xfer_open_uri ( struct xfer_interface *xfer, struct uri *uri ) {
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struct uri_opener *opener;
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struct uri *resolved_uri;
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int rc = -ENOTSUP;
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/* Resolve URI */
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resolved_uri = resolve_uri ( cwuri, uri );
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if ( ! resolved_uri )
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return -ENOMEM;
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/* Find opener which supports this URI scheme */
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for_each_table_entry ( opener, URI_OPENERS ) {
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if ( strcmp ( resolved_uri->scheme, opener->scheme ) == 0 ) {
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DBGC ( xfer, "XFER %p opening %s URI\n",
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xfer, opener->scheme );
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rc = opener->open ( xfer, resolved_uri );
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goto done;
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}
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}
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DBGC ( xfer, "XFER %p attempted to open unsupported URI scheme "
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"\"%s\"\n", xfer, resolved_uri->scheme );
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done:
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uri_put ( resolved_uri );
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return rc;
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}
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/**
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* Open URI string
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*
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* @v xfer Data transfer interface
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* @v uri_string URI string (e.g. "http://ipxe.org/kernel")
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* @ret rc Return status code
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*
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* The URI will be regarded as being relative to the current working
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* URI (see churi()).
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*/
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int xfer_open_uri_string ( struct xfer_interface *xfer,
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const char *uri_string ) {
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struct uri *uri;
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int rc;
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DBGC ( xfer, "XFER %p opening URI %s\n", xfer, uri_string );
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uri = parse_uri ( uri_string );
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if ( ! uri )
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return -ENOMEM;
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rc = xfer_open_uri ( xfer, uri );
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uri_put ( uri );
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return rc;
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}
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/**
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* Open socket
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*
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* @v xfer Data transfer interface
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* @v semantics Communication semantics (e.g. SOCK_STREAM)
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* @v peer Peer socket address
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* @v local Local socket address, or NULL
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* @ret rc Return status code
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*/
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int xfer_open_socket ( struct xfer_interface *xfer, int semantics,
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struct sockaddr *peer, struct sockaddr *local ) {
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struct socket_opener *opener;
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DBGC ( xfer, "XFER %p opening (%s,%s) socket\n", xfer,
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socket_semantics_name ( semantics ),
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socket_family_name ( peer->sa_family ) );
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for_each_table_entry ( opener, SOCKET_OPENERS ) {
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if ( ( opener->semantics == semantics ) &&
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( opener->family == peer->sa_family ) ) {
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return opener->open ( xfer, peer, local );
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}
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}
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DBGC ( xfer, "XFER %p attempted to open unsupported socket type "
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"(%s,%s)\n", xfer, socket_semantics_name ( semantics ),
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socket_family_name ( peer->sa_family ) );
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return -ENOTSUP;
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}
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/**
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* Open location
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*
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* @v xfer Data transfer interface
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* @v type Location type
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* @v args Remaining arguments depend upon location type
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* @ret rc Return status code
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*/
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int xfer_vopen ( struct xfer_interface *xfer, int type, va_list args ) {
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switch ( type ) {
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case LOCATION_URI_STRING: {
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const char *uri_string = va_arg ( args, const char * );
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return xfer_open_uri_string ( xfer, uri_string ); }
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case LOCATION_URI: {
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struct uri *uri = va_arg ( args, struct uri * );
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return xfer_open_uri ( xfer, uri ); }
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case LOCATION_SOCKET: {
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int semantics = va_arg ( args, int );
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struct sockaddr *peer = va_arg ( args, struct sockaddr * );
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struct sockaddr *local = va_arg ( args, struct sockaddr * );
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return xfer_open_socket ( xfer, semantics, peer, local ); }
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default:
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DBGC ( xfer, "XFER %p attempted to open unsupported location "
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"type %d\n", xfer, type );
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return -ENOTSUP;
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}
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}
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/**
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* Open location
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*
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* @v xfer Data transfer interface
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* @v type Location type
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* @v ... Remaining arguments depend upon location type
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* @ret rc Return status code
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*/
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int xfer_open ( struct xfer_interface *xfer, int type, ... ) {
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va_list args;
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int rc;
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va_start ( args, type );
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rc = xfer_vopen ( xfer, type, args );
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va_end ( args );
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return rc;
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}
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/**
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* Reopen location
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*
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* @v xfer Data transfer interface
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* @v type Location type
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* @v args Remaining arguments depend upon location type
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* @ret rc Return status code
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*
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* This will close the existing connection and open a new connection
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* using xfer_vopen(). It is intended to be used as a .vredirect
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* method handler.
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*/
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int xfer_vreopen ( struct xfer_interface *xfer, int type, va_list args ) {
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/* Close existing connection */
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xfer_close ( xfer, 0 );
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/* Open new location */
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return xfer_vopen ( xfer, type, args );
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}
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