Updated FTP to use data-xfer API.
This commit is contained in:
Michael Brown
parent
3acd51597a
commit
0dfd5b84fd
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@ -7,63 +7,7 @@
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*
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*/
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#include <stdint.h>
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#include <gpxe/async.h>
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#include <gpxe/stream.h>
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struct buffer;
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/** FTP default port */
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#define FTP_PORT 21
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/**
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* FTP states
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*
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* These @b must be sequential, i.e. a successful FTP session must
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* pass through each of these states in order.
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*/
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enum ftp_state {
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FTP_CONNECT = 0,
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FTP_USER,
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FTP_PASS,
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FTP_TYPE,
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FTP_PASV,
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FTP_RETR,
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FTP_QUIT,
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FTP_DONE,
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};
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/**
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* An FTP request
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*
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*/
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struct ftp_request {
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/** URI being fetched */
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struct uri *uri;
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/** Data buffer to fill */
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struct buffer *buffer;
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/** Asynchronous operation */
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struct async async;
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/** Current state */
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enum ftp_state state;
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/** Amount of current message already transmitted */
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size_t already_sent;
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/** Buffer to be filled with data received via the control channel */
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char *recvbuf;
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/** Remaining size of recvbuf */
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size_t recvsize;
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/** FTP status code, as text */
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char status_text[4];
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/** Passive-mode parameters, as text */
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char passive_text[24]; /* "aaa,bbb,ccc,ddd,eee,fff" */
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/** Stream application for the control channel */
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struct stream_application stream;
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/** Stream application for the data channel */
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struct stream_application stream_data;
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};
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extern int ftp_get ( struct uri *uri, struct buffer *buffer,
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struct async *parent );
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#endif /* _GPXE_FTP_H */
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@ -1,15 +1,16 @@
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <byteswap.h>
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#include <gpxe/async.h>
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#include <gpxe/buffer.h>
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#include <gpxe/socket.h>
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#include <gpxe/tcpip.h>
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#include <gpxe/in.h>
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#include <gpxe/xfer.h>
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#include <gpxe/open.h>
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#include <gpxe/uri.h>
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#include <gpxe/download.h>
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#include <gpxe/tcp.h>
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#include <gpxe/ftp.h>
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/** @file
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@ -18,13 +19,94 @@
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*
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*/
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/**
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* FTP states
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*
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* These @b must be sequential, i.e. a successful FTP session must
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* pass through each of these states in order.
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*/
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enum ftp_state {
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FTP_CONNECT = 0,
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FTP_USER,
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FTP_PASS,
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FTP_TYPE,
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FTP_PASV,
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FTP_RETR,
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FTP_QUIT,
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FTP_DONE,
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};
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/**
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* An FTP request
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*
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*/
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struct ftp_request {
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/** Reference counter */
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struct refcnt refcnt;
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/** Data transfer interface */
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struct xfer_interface xfer;
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/** URI being fetched */
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struct uri *uri;
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/** FTP control channel interface */
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struct xfer_interface control;
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/** FTP data channel interface */
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struct xfer_interface data;
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/** Current state */
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enum ftp_state state;
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/** Buffer to be filled with data received via the control channel */
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char *recvbuf;
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/** Remaining size of recvbuf */
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size_t recvsize;
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/** FTP status code, as text */
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char status_text[5];
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/** Passive-mode parameters, as text */
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char passive_text[24]; /* "aaa,bbb,ccc,ddd,eee,fff" */
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};
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/**
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* Free FTP request
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*
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* @v refcnt Reference counter
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*/
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static void ftp_free ( struct refcnt *refcnt ) {
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struct ftp_request *ftp =
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container_of ( refcnt, struct ftp_request, refcnt );
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DBGC ( ftp, "FTP %p freed\n", ftp );
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uri_put ( ftp->uri );
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free ( ftp );
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}
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/**
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* Mark FTP operation as complete
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*
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* @v ftp FTP request
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* @v rc Return status code
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*/
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static void ftp_done ( struct ftp_request *ftp, int rc ) {
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DBGC ( ftp, "FTP %p completed (%s)\n", ftp, strerror ( rc ) );
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/* Close all data transfer interfaces */
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xfer_nullify ( &ftp->xfer );
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xfer_close ( &ftp->xfer, rc );
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xfer_nullify ( &ftp->control );
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xfer_close ( &ftp->control, rc );
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xfer_nullify ( &ftp->data );
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xfer_close ( &ftp->data, rc );
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}
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/*****************************************************************************
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*
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* FTP control channel
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*
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*/
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/** FTP control channel strings
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/**
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* FTP control channel strings
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*
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* These are used as printf() format strings. Since only one of them
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* (RETR) takes an argument, we always supply that argument to the
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@ -42,32 +124,23 @@ static const char * ftp_strings[] = {
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};
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/**
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* Get FTP request from control stream application
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* Handle control channel being closed
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*
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* @v app Stream application
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* @ret ftp FTP request
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*/
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static inline struct ftp_request *
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stream_to_ftp ( struct stream_application *app ) {
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return container_of ( app, struct ftp_request, stream );
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}
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/**
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* Mark FTP operation as complete
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* @v control FTP control channel interface
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* @v rc Reason for close
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*
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* @v ftp FTP request
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* @v rc Return status code
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* When the control channel is closed, the data channel must also be
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* closed, if it is currently open.
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*/
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static void ftp_done ( struct ftp_request *ftp, int rc ) {
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static void ftp_control_close ( struct xfer_interface *control, int rc ) {
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struct ftp_request *ftp =
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container_of ( control, struct ftp_request, control );
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DBGC ( ftp, "FTP %p completed with status %d\n", ftp, rc );
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DBGC ( ftp, "FTP %p control connection closed: %s\n",
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ftp, strerror ( rc ) );
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/* Close both stream connections */
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stream_close ( &ftp->stream );
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stream_close ( &ftp->stream_data );
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/* Mark asynchronous operation as complete */
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async_done ( &ftp->async, rc );
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/* Complete FTP operation */
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ftp_done ( ftp, rc );
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}
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/**
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@ -102,9 +175,14 @@ static void ftp_parse_value ( char **text, uint8_t *value, size_t len ) {
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*/
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static void ftp_reply ( struct ftp_request *ftp ) {
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char status_major = ftp->status_text[0];
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char separator = ftp->status_text[3];
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DBGC ( ftp, "FTP %p received status %s\n", ftp, ftp->status_text );
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/* Ignore malformed lines */
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if ( separator != ' ' )
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return;
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/* Ignore "intermediate" responses (1xx codes) */
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if ( status_major == '1' )
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return;
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@ -133,47 +211,42 @@ static void ftp_reply ( struct ftp_request *ftp ) {
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sizeof ( sa.sin.sin_addr ) );
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ftp_parse_value ( &ptr, ( uint8_t * ) &sa.sin.sin_port,
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sizeof ( sa.sin.sin_port ) );
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if ( ( rc = tcp_open ( &ftp->stream_data ) ) != 0 ) {
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if ( ( rc = xfer_open_socket ( &ftp->data, SOCK_STREAM,
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&sa.sa, NULL ) ) != 0 ) {
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DBGC ( ftp, "FTP %p could not open data connection\n",
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ftp );
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ftp_done ( ftp, rc );
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return;
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}
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if ( ( rc = stream_connect ( &ftp->stream_data,
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&sa.sa ) ) != 0 ){
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DBGC ( ftp, "FTP %p could not make data connection\n",
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ftp );
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ftp_done ( ftp, rc );
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return;
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}
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}
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/* Move to next state */
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if ( ftp->state < FTP_DONE )
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ftp->state++;
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ftp->already_sent = 0;
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/* Send control string */
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if ( ftp->state < FTP_DONE ) {
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DBGC ( ftp, "FTP %p sending ", ftp );
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DBGC ( ftp, ftp_strings[ftp->state], ftp->uri->path );
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xfer_printf ( &ftp->control, ftp_strings[ftp->state],
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ftp->uri->path );
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}
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return;
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}
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/**
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* Handle new data arriving on FTP control channel
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*
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* @v app Stream application
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* @v control FTP control channel interface
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* @v data New data
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* @v len Length of new data
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*
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* Data is collected until a complete line is received, at which point
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* its information is passed to ftp_reply().
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*/
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static void ftp_newdata ( struct stream_application *app,
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void *data, size_t len ) {
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struct ftp_request *ftp = stream_to_ftp ( app );
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static int ftp_control_deliver_raw ( struct xfer_interface *control,
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const void *data, size_t len ) {
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struct ftp_request *ftp =
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container_of ( control, struct ftp_request, control );
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char *recvbuf = ftp->recvbuf;
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size_t recvsize = ftp->recvsize;
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char c;
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@ -215,62 +288,19 @@ static void ftp_newdata ( struct stream_application *app,
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/* Store for next invocation */
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ftp->recvbuf = recvbuf;
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ftp->recvsize = recvsize;
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}
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/**
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* Handle acknowledgement of data sent on FTP control channel
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*
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* @v app Stream application
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*/
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static void ftp_acked ( struct stream_application *app, size_t len ) {
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struct ftp_request *ftp = stream_to_ftp ( app );
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/* Mark off ACKed portion of the currently-transmitted data */
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ftp->already_sent += len;
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}
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/**
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* Construct data to send on FTP control channel
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*
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* @v app Stream application
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* @v buf Temporary data buffer
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* @v len Length of temporary data buffer
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*/
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static void ftp_senddata ( struct stream_application *app,
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void *buf, size_t len ) {
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struct ftp_request *ftp = stream_to_ftp ( app );
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/* Send the as-yet-unACKed portion of the string for the
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* current state.
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*/
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len = snprintf ( buf, len, ftp_strings[ftp->state], ftp->uri->path );
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stream_send ( app, buf + ftp->already_sent, len - ftp->already_sent );
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}
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/**
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* Handle control channel being closed
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*
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* @v app Stream application
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*
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* When the control channel is closed, the data channel must also be
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* closed, if it is currently open.
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*/
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static void ftp_closed ( struct stream_application *app, int rc ) {
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struct ftp_request *ftp = stream_to_ftp ( app );
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DBGC ( ftp, "FTP %p control connection closed: %s\n",
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ftp, strerror ( rc ) );
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/* Complete FTP operation */
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ftp_done ( ftp, rc );
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return 0;
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}
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/** FTP control channel operations */
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static struct stream_application_operations ftp_stream_operations = {
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.closed = ftp_closed,
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.acked = ftp_acked,
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.newdata = ftp_newdata,
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.senddata = ftp_senddata,
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static struct xfer_interface_operations ftp_control_operations = {
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.close = ftp_control_close,
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.vredirect = xfer_vopen,
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.request = ignore_xfer_request,
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.seek = ignore_xfer_seek,
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.alloc_iob = default_xfer_alloc_iob,
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.deliver_iob = xfer_deliver_as_raw,
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.deliver_raw = ftp_control_deliver_raw,
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};
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/*****************************************************************************
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@ -280,20 +310,10 @@ static struct stream_application_operations ftp_stream_operations = {
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*/
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/**
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* Get FTP request from data stream application
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* Handle FTP data channel being closed
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*
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* @v app Stream application
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* @ret ftp FTP request
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*/
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static inline struct ftp_request *
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stream_to_ftp_data ( struct stream_application *app ) {
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return container_of ( app, struct ftp_request, stream_data );
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}
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/**
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* Handle data channel being closed
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*
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* @v app Stream application
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* @v data FTP data channel interface
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* @v rc Reason for closure
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*
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* When the data channel is closed, the control channel should be left
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* alone; the server will send a completion message via the control
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@ -301,8 +321,9 @@ stream_to_ftp_data ( struct stream_application *app ) {
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*
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* If the data channel is closed due to an error, we abort the request.
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*/
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static void ftp_data_closed ( struct stream_application *app, int rc ) {
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struct ftp_request *ftp = stream_to_ftp_data ( app );
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static void ftp_data_closed ( struct xfer_interface *data, int rc ) {
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struct ftp_request *ftp =
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container_of ( data, struct ftp_request, data );
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DBGC ( ftp, "FTP %p data connection closed: %s\n",
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ftp, strerror ( rc ) );
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@ -313,121 +334,132 @@ static void ftp_data_closed ( struct stream_application *app, int rc ) {
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}
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/**
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* Handle new data arriving on the FTP data channel
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* Handle data delivery via FTP data channel
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*
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* @v app Stream application
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* @v data New data
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* @v len Length of new data
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* @v xfer FTP data channel interface
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* @v iobuf I/O buffer
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* @ret rc Return status code
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*/
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static void ftp_data_newdata ( struct stream_application *app,
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void *data, size_t len ) {
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struct ftp_request *ftp = stream_to_ftp_data ( app );
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static int ftp_data_deliver_iob ( struct xfer_interface *data,
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struct io_buffer *iobuf ) {
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struct ftp_request *ftp =
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container_of ( data, struct ftp_request, data );
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int rc;
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/* Fill data buffer */
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if ( ( rc = fill_buffer ( ftp->buffer, data,
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ftp->buffer->fill, len ) ) != 0 ){
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DBGC ( ftp, "FTP %p failed to fill data buffer: %s\n",
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if ( ( rc = xfer_deliver_iob ( &ftp->xfer, iobuf ) ) != 0 ) {
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DBGC ( ftp, "FTP %p failed to deliver data: %s\n",
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ftp, strerror ( rc ) );
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ftp_done ( ftp, rc );
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return;
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return rc;
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}
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return 0;
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}
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/** FTP data channel operations */
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static struct stream_application_operations ftp_data_stream_operations = {
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.closed = ftp_data_closed,
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.newdata = ftp_data_newdata,
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static struct xfer_interface_operations ftp_data_operations = {
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.close = ftp_data_closed,
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.vredirect = xfer_vopen,
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.request = ignore_xfer_request,
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.seek = ignore_xfer_seek,
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.alloc_iob = default_xfer_alloc_iob,
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.deliver_iob = ftp_data_deliver_iob,
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.deliver_raw = xfer_deliver_as_iob,
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};
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/*****************************************************************************
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*
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* API
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* Data transfer interface
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*
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*/
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/**
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* Reap asynchronous operation
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* Close FTP data transfer interface
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*
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* @v async Asynchronous operation
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* @v xfer FTP data transfer interface
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* @v rc Reason for close
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*/
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static void ftp_reap ( struct async *async ) {
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static void ftp_xfer_closed ( struct xfer_interface *xfer, int rc ) {
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struct ftp_request *ftp =
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container_of ( async, struct ftp_request, async );
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container_of ( xfer, struct ftp_request, xfer );
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free ( ftp );
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DBGC ( ftp, "FTP %p data transfer interface closed: %s\n",
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ftp, strerror ( rc ) );
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ftp_done ( ftp, rc );
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}
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/** FTP asynchronous operations */
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static struct async_operations ftp_async_operations = {
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.reap = ftp_reap,
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/** FTP data transfer interface operations */
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static struct xfer_interface_operations ftp_xfer_operations = {
|
||||
.close = ftp_xfer_closed,
|
||||
.vredirect = ignore_xfer_vredirect,
|
||||
.request = ignore_xfer_request,
|
||||
.seek = ignore_xfer_seek,
|
||||
.alloc_iob = default_xfer_alloc_iob,
|
||||
.deliver_iob = xfer_deliver_as_raw,
|
||||
.deliver_raw = ignore_xfer_deliver_raw,
|
||||
};
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* URI opener
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* Initiate an FTP connection
|
||||
*
|
||||
* @v xfer Data transfer interface
|
||||
* @v uri Uniform Resource Identifier
|
||||
* @v buffer Buffer into which to download file
|
||||
* @v parent Parent asynchronous operation
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
int ftp_get ( struct uri *uri, struct buffer *buffer, struct async *parent ) {
|
||||
struct ftp_request *ftp = NULL;
|
||||
static int ftp_open ( struct xfer_interface *xfer, struct uri *uri ) {
|
||||
struct ftp_request *ftp;
|
||||
struct sockaddr_tcpip server;
|
||||
int rc;
|
||||
|
||||
/* Sanity checks */
|
||||
if ( ! uri->path ) {
|
||||
rc = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
if ( ! uri->path )
|
||||
return -EINVAL;
|
||||
if ( ! uri->host )
|
||||
return -EINVAL;
|
||||
|
||||
/* Allocate and populate FTP structure */
|
||||
/* Allocate and populate structure */
|
||||
ftp = malloc ( sizeof ( *ftp ) );
|
||||
if ( ! ftp ) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
if ( ! ftp )
|
||||
return -ENOMEM;
|
||||
memset ( ftp, 0, sizeof ( *ftp ) );
|
||||
ftp->uri = uri;
|
||||
ftp->buffer = buffer;
|
||||
ftp->state = FTP_CONNECT;
|
||||
ftp->already_sent = 0;
|
||||
ftp->refcnt.free = ftp_free;
|
||||
xfer_init ( &ftp->xfer, &ftp_xfer_operations, &ftp->refcnt );
|
||||
ftp->uri = uri_get ( uri );
|
||||
xfer_init ( &ftp->control, &ftp_control_operations, &ftp->refcnt );
|
||||
xfer_init ( &ftp->data, &ftp_data_operations, &ftp->refcnt );
|
||||
ftp->recvbuf = ftp->status_text;
|
||||
ftp->recvsize = sizeof ( ftp->status_text ) - 1;
|
||||
ftp->stream.op = &ftp_stream_operations;
|
||||
ftp->stream_data.op = &ftp_data_stream_operations;
|
||||
|
||||
#warning "Quick name resolution hack"
|
||||
union {
|
||||
struct sockaddr sa;
|
||||
struct sockaddr_in sin;
|
||||
} server;
|
||||
server.sin.sin_port = htons ( FTP_PORT );
|
||||
server.sin.sin_family = AF_INET;
|
||||
if ( inet_aton ( uri->host, &server.sin.sin_addr ) == 0 ) {
|
||||
rc = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
DBGC ( ftp, "FTP %p fetching %s\n", ftp, ftp->uri->path );
|
||||
|
||||
if ( ( rc = tcp_open ( &ftp->stream ) ) != 0 )
|
||||
goto err;
|
||||
if ( ( rc = stream_connect ( &ftp->stream, &server.sa ) ) != 0 )
|
||||
/* Open control connection */
|
||||
memset ( &server, 0, sizeof ( server ) );
|
||||
server.st_port = htons ( uri_port ( uri, FTP_PORT ) );
|
||||
if ( ( rc = xfer_open_named_socket ( &ftp->control, SOCK_STREAM,
|
||||
( struct sockaddr * ) &server,
|
||||
uri->host, NULL ) ) != 0 )
|
||||
goto err;
|
||||
|
||||
async_init ( &ftp->async, &ftp_async_operations, parent );
|
||||
/* Attach to parent interface, mortalise self, and return */
|
||||
xfer_plug_plug ( &ftp->xfer, xfer );
|
||||
ref_put ( &ftp->refcnt );
|
||||
return 0;
|
||||
|
||||
err:
|
||||
DBGC ( ftp, "FTP %p could not create request: %s\n",
|
||||
ftp, strerror ( rc ) );
|
||||
free ( ftp );
|
||||
ref_put ( &ftp->refcnt );
|
||||
return rc;
|
||||
}
|
||||
|
||||
/** HTTP download protocol */
|
||||
struct download_protocol ftp_download_protocol __download_protocol = {
|
||||
.name = "ftp",
|
||||
.start_download = ftp_get,
|
||||
/** FTP URI opener */
|
||||
struct uri_opener ftp_uri_opener __uri_opener = {
|
||||
.scheme = "ftp",
|
||||
.open = ftp_open,
|
||||
};
|
||||
|
|
|
|||
Reference in New Issue