114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/* *****************************************************************************
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* storage/request.c -- request a file from the calculator.
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* Copyright (C) 2016-2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libp7.
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* libp7 is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libp7 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libp7; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************** */
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#include <libp7/internals.h>
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/**
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* p7_request:
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* Requests a file.
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*
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* @arg handle the libp7 handle
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* @arg buffer the buffer (should be writable)
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* @arg dirname the directory name
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* @arg filename the filename
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* @arg devname the device name
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* @arg disp callback display
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* @return if it worked
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*/
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int p7_request(p7_handle_t *handle, const p7_buffer_t *buffer,
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const char *dirname, const char *filename, const char *devname,
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p7_disp_t disp)
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{
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int err;
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/* make checks */
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chk_required_filename(filename);
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chk_dirname(dirname);
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chk_bufwrite(buffer);
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chk_handle(handle);
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chk_active(handle);
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/* send command packet */
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log_info("sending file transfer request");
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if ((err = p7_send_cmdfls_reqfile(handle, dirname, filename, devname))) {
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log_fatal("couldn't send file transfer request/didn't receive answer");
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return (err);
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}
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/* check response packet */
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if (response.type == p7_pt_error
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&& response.code == p7_err_other) {
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log_fatal("requested file doesn't exist");
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return (p7_error_notfound);
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} else if (response.type != p7_pt_ack) {
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log_fatal("didn't receive ack or known error...");
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return (p7_error_unknown);
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}
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/* swap roles */
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log_info("sending roleswap");
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if ((err = p7_send_roleswp(handle))) {
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log_fatal("couldn't swap roles");
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return (err);
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} else if (response.type != p7_pt_cmd || response.code != 0x45) {
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log_fatal("didn't receive expected command");
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return (p7_error_unknown);
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}
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/* get data */
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if ((err = p7_get_buffer(handle, buffer, response.filesize, 0, disp)))
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return (err);
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/* check if last answer was roleswap */
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if (response.type != p7_pt_roleswp)
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return (p7_error_unknown);
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/* no error! */
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return (0);
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}
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#ifndef P7_DISABLED_FILE
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/**
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* p7_reqfile:
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* Request a FILE.
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*
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* @arg handle the handle.
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* @arg file the FILE.
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* @arg dirname the directory name
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* @arg filename the file name
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* @arg devname the storage device name
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* @arg disp the display callback
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* @return the error code (0 if ok).
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*/
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int p7_reqfile(p7_handle_t *handle, FILE *file,
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const char *dirname, const char *filename, const char *devname,
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p7_disp_t disp)
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{
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chk_iswrite(file);
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p7_buffer_t buffer = {
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.cookie = file,
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.write = p7_filebuffer_write
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};
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return (p7_request(handle, &buffer, dirname, filename, devname, disp));
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}
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#endif
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