fastboot/protocol.cpp - platform/system/core - Gitiles

 /*
  * Copyright (C) 2008 The Android Open Source Project
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #define round_down(a, b) \
     ({ typeof(a) _a = (a); typeof(b) _b = (b); _a - (_a % _b); })

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>

 #include <algorithm>

 #include <sparse/sparse.h>

 #include "fastboot.h"

 static char ERROR[128];

 char *fb_get_error(void)
 {
     return ERROR;
 }

 static int check_response(usb_handle* usb, uint32_t size, char* response) {
     char status[65];

     while (true) {
         int r = usb_read(usb, status, 64);
         if (r < 0) {
             sprintf(ERROR, "status read failed (%s)", strerror(errno));
             usb_close(usb);
             return -1;
         }
         status[r] = 0;

         if (r < 4) {
             sprintf(ERROR, "status malformed (%d bytes)", r);
             usb_close(usb);
             return -1;
         }

         if (!memcmp(status, "INFO", 4)) {
             fprintf(stderr,"(bootloader) %s\n", status + 4);
             continue;
         }

         if (!memcmp(status, "OKAY", 4)) {
             if (response) {
                 strcpy(response, (char*) status + 4);
             }
             return 0;
         }

         if (!memcmp(status, "FAIL", 4)) {
             if (r > 4) {
                 sprintf(ERROR, "remote: %s", status + 4);
             } else {
                 strcpy(ERROR, "remote failure");
             }
             return -1;
         }

         if (!memcmp(status, "DATA", 4) && size > 0){
             uint32_t dsize = strtol(status + 4, 0, 16);
             if (dsize > size) {
                 strcpy(ERROR, "data size too large");
                 usb_close(usb);
                 return -1;
             }
             return dsize;
         }

         strcpy(ERROR,"unknown status code");
         usb_close(usb);
         break;
     }

     return -1;
 }

 static int _command_start(usb_handle* usb, const char* cmd, uint32_t size, char* response) {
     size_t cmdsize = strlen(cmd);
     if (cmdsize > 64) {
         sprintf(ERROR, "command too large");
         return -1;
     }

     if (response) {
         response[0] = 0;
     }

     if (usb_write(usb, cmd, cmdsize) != static_cast<int>(cmdsize)) {
         sprintf(ERROR, "command write failed (%s)", strerror(errno));
         usb_close(usb);
         return -1;
     }

     return check_response(usb, size, response);
 }

 static int _command_data(usb_handle* usb, const void* data, uint32_t size) {
     int r = usb_write(usb, data, size);
     if (r < 0) {
         sprintf(ERROR, "data transfer failure (%s)", strerror(errno));
         usb_close(usb);
         return -1;
     }
     if (r != ((int) size)) {
         sprintf(ERROR, "data transfer failure (short transfer)");
         usb_close(usb);
         return -1;
     }
     return r;
 }

 static int _command_end(usb_handle* usb) {
     return check_response(usb, 0, 0) < 0 ? -1 : 0;
 }

 static int _command_send(usb_handle* usb, const char* cmd, const void* data, uint32_t size,
                          char* response) {
     if (size == 0) {
         return -1;
     }

     int r = _command_start(usb, cmd, size, response);
     if (r < 0) {
         return -1;
     }

     r = _command_data(usb, data, size);
     if (r < 0) {
         return -1;
     }

     r = _command_end(usb);
     if (r < 0) {
         return -1;
     }

     return size;
 }

 static int _command_send_no_data(usb_handle* usb, const char* cmd, char* response) {
     return _command_start(usb, cmd, 0, response);
 }

 int fb_command(usb_handle* usb, const char* cmd) {
     return _command_send_no_data(usb, cmd, 0);
 }

 int fb_command_response(usb_handle* usb, const char* cmd, char* response) {
     return _command_send_no_data(usb, cmd, response);
 }

 int fb_download_data(usb_handle* usb, const void* data, uint32_t size) {
     char cmd[64];
     sprintf(cmd, "download:%08x", size);
     return _command_send(usb, cmd, data, size, 0) < 0 ? -1 : 0;
 }

 #define USB_BUF_SIZE 1024
 static char usb_buf[USB_BUF_SIZE];
 static int usb_buf_len;

 static int fb_download_data_sparse_write(void *priv, const void *data, int len)
 {
     int r;
     usb_handle* usb = reinterpret_cast<usb_handle*>(priv);
     int to_write;
     const char* ptr = reinterpret_cast<const char*>(data);

     if (usb_buf_len) {
         to_write = std::min(USB_BUF_SIZE - usb_buf_len, len);

         memcpy(usb_buf + usb_buf_len, ptr, to_write);
         usb_buf_len += to_write;
         ptr += to_write;
         len -= to_write;
     }

     if (usb_buf_len == USB_BUF_SIZE) {
         r = _command_data(usb, usb_buf, USB_BUF_SIZE);
         if (r != USB_BUF_SIZE) {
             return -1;
         }
         usb_buf_len = 0;
     }

     if (len > USB_BUF_SIZE) {
         if (usb_buf_len > 0) {
             sprintf(ERROR, "internal error: usb_buf not empty\n");
             return -1;
         }
         to_write = round_down(len, USB_BUF_SIZE);
         r = _command_data(usb, ptr, to_write);
         if (r != to_write) {
             return -1;
         }
         ptr += to_write;
         len -= to_write;
     }

     if (len > 0) {
         if (len > USB_BUF_SIZE) {
             sprintf(ERROR, "internal error: too much left for usb_buf\n");
             return -1;
         }
         memcpy(usb_buf, ptr, len);
         usb_buf_len = len;
     }

     return 0;
 }

 static int fb_download_data_sparse_flush(usb_handle* usb) {
     if (usb_buf_len > 0) {
         if (_command_data(usb, usb_buf, usb_buf_len) != usb_buf_len) {
             return -1;
         }
         usb_buf_len = 0;
     }
     return 0;
 }

 int fb_download_data_sparse(usb_handle* usb, struct sparse_file* s) {
     int size = sparse_file_len(s, true, false);
     if (size <= 0) {
         return -1;
     }

     char cmd[64];
     sprintf(cmd, "download:%08x", size);
     int r = _command_start(usb, cmd, size, 0);
     if (r < 0) {
         return -1;
     }

     r = sparse_file_callback(s, true, false, fb_download_data_sparse_write, usb);
     if (r < 0) {
         return -1;
     }

     r = fb_download_data_sparse_flush(usb);
     if (r < 0) {
         return -1;
     }

     return _command_end(usb);
 }
	/*
	* Copyright (C) 2008 The Android Open Source Project
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
	* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#define round_down(a, b) \
	({ typeof(a) _a = (a); typeof(b) _b = (b); _a - (_a % _b); })

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <errno.h>

	#include <algorithm>

	#include <sparse/sparse.h>

	#include "fastboot.h"

	static char ERROR[128];

	char *fb_get_error(void)
	{
	return ERROR;
	}

	static int check_response(usb_handle* usb, uint32_t size, char* response) {
	char status[65];

	while (true) {
	int r = usb_read(usb, status, 64);
	if (r < 0) {
	sprintf(ERROR, "status read failed (%s)", strerror(errno));
	usb_close(usb);
	return -1;
	}
	status[r] = 0;

	if (r < 4) {
	sprintf(ERROR, "status malformed (%d bytes)", r);
	usb_close(usb);
	return -1;
	}

	if (!memcmp(status, "INFO", 4)) {
	fprintf(stderr,"(bootloader) %s\n", status + 4);
	continue;
	}

	if (!memcmp(status, "OKAY", 4)) {
	if (response) {
	strcpy(response, (char*) status + 4);
	}
	return 0;
	}

	if (!memcmp(status, "FAIL", 4)) {
	if (r > 4) {
	sprintf(ERROR, "remote: %s", status + 4);
	} else {
	strcpy(ERROR, "remote failure");
	}
	return -1;
	}

	if (!memcmp(status, "DATA", 4) && size > 0){
	uint32_t dsize = strtol(status + 4, 0, 16);
	if (dsize > size) {
	strcpy(ERROR, "data size too large");
	usb_close(usb);
	return -1;
	}
	return dsize;
	}

	strcpy(ERROR,"unknown status code");
	usb_close(usb);
	break;
	}

	return -1;
	}

	static int _command_start(usb_handle* usb, const char* cmd, uint32_t size, char* response) {
	size_t cmdsize = strlen(cmd);
	if (cmdsize > 64) {
	sprintf(ERROR, "command too large");
	return -1;
	}

	if (response) {
	response[0] = 0;
	}

	if (usb_write(usb, cmd, cmdsize) != static_cast<int>(cmdsize)) {
	sprintf(ERROR, "command write failed (%s)", strerror(errno));
	usb_close(usb);
	return -1;
	}

	return check_response(usb, size, response);
	}

	static int _command_data(usb_handle* usb, const void* data, uint32_t size) {
	int r = usb_write(usb, data, size);
	if (r < 0) {
	sprintf(ERROR, "data transfer failure (%s)", strerror(errno));
	usb_close(usb);
	return -1;
	}
	if (r != ((int) size)) {
	sprintf(ERROR, "data transfer failure (short transfer)");
	usb_close(usb);
	return -1;
	}
	return r;
	}

	static int _command_end(usb_handle* usb) {
	return check_response(usb, 0, 0) < 0 ? -1 : 0;
	}

	static int _command_send(usb_handle* usb, const char* cmd, const void* data, uint32_t size,
	char* response) {
	if (size == 0) {
	return -1;
	}

	int r = _command_start(usb, cmd, size, response);
	if (r < 0) {
	return -1;
	}

	r = _command_data(usb, data, size);
	if (r < 0) {
	return -1;
	}

	r = _command_end(usb);
	if (r < 0) {
	return -1;
	}

	return size;
	}

	static int _command_send_no_data(usb_handle* usb, const char* cmd, char* response) {
	return _command_start(usb, cmd, 0, response);
	}

	int fb_command(usb_handle* usb, const char* cmd) {
	return _command_send_no_data(usb, cmd, 0);
	}

	int fb_command_response(usb_handle* usb, const char* cmd, char* response) {
	return _command_send_no_data(usb, cmd, response);
	}

	int fb_download_data(usb_handle* usb, const void* data, uint32_t size) {
	char cmd[64];
	sprintf(cmd, "download:%08x", size);
	return _command_send(usb, cmd, data, size, 0) < 0 ? -1 : 0;
	}

	#define USB_BUF_SIZE 1024
	static char usb_buf[USB_BUF_SIZE];
	static int usb_buf_len;

	static int fb_download_data_sparse_write(void priv, const void data, int len)
	{
	int r;
	usb_handle* usb = reinterpret_cast<usb_handle*>(priv);
	int to_write;
	const char* ptr = reinterpret_cast<const char*>(data);

	if (usb_buf_len) {
	to_write = std::min(USB_BUF_SIZE - usb_buf_len, len);

	memcpy(usb_buf + usb_buf_len, ptr, to_write);
	usb_buf_len += to_write;
	ptr += to_write;
	len -= to_write;
	}

	if (usb_buf_len == USB_BUF_SIZE) {
	r = _command_data(usb, usb_buf, USB_BUF_SIZE);
	if (r != USB_BUF_SIZE) {
	return -1;
	}
	usb_buf_len = 0;
	}

	if (len > USB_BUF_SIZE) {
	if (usb_buf_len > 0) {
	sprintf(ERROR, "internal error: usb_buf not empty\n");
	return -1;
	}
	to_write = round_down(len, USB_BUF_SIZE);
	r = _command_data(usb, ptr, to_write);
	if (r != to_write) {
	return -1;
	}
	ptr += to_write;
	len -= to_write;
	}

	if (len > 0) {
	if (len > USB_BUF_SIZE) {
	sprintf(ERROR, "internal error: too much left for usb_buf\n");
	return -1;
	}
	memcpy(usb_buf, ptr, len);
	usb_buf_len = len;
	}

	return 0;
	}

	static int fb_download_data_sparse_flush(usb_handle* usb) {
	if (usb_buf_len > 0) {
	if (_command_data(usb, usb_buf, usb_buf_len) != usb_buf_len) {
	return -1;
	}
	usb_buf_len = 0;
	}
	return 0;
	}

	int fb_download_data_sparse(usb_handle* usb, struct sparse_file* s) {
	int size = sparse_file_len(s, true, false);
	if (size <= 0) {
	return -1;
	}

	char cmd[64];
	sprintf(cmd, "download:%08x", size);
	int r = _command_start(usb, cmd, size, 0);
	if (r < 0) {
	return -1;
	}

	r = sparse_file_callback(s, true, false, fb_download_data_sparse_write, usb);
	if (r < 0) {
	return -1;
	}

	r = fb_download_data_sparse_flush(usb);
	if (r < 0) {
	return -1;
	}

	return _command_end(usb);
	}