--- /dev/null
+/*
+ * 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 );
+}
Code Review / kvmfornfv.git / blobdiff