b4d5c8a039
And always create the file if necessary. No need to have an extra flag for this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
696 lines
16 KiB
C
696 lines
16 KiB
C
/**
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* @file
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* @brief LoadB and LoadY support.
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*
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* Provides loadb (over Kermit) and LoadY(over Y modem) support to download
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* images.
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*
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* FileName: commands/loadb.c
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*/
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/*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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
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* the License, or (at your option) any later version.
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*
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* This program 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. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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* Serial up- and download support
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*/
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#include <common.h>
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#include <command.h>
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#include <console.h>
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#include <errno.h>
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#include <environment.h>
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#include <cache.h>
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#include <getopt.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <malloc.h>
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#define XON_CHAR 17
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#define XOFF_CHAR 19
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#define START_CHAR 0x01
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#define ETX_CHAR 0x03
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#define END_CHAR 0x0D
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#define SPACE 0x20
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#define K_ESCAPE 0x23
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#define SEND_TYPE 'S'
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#define DATA_TYPE 'D'
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#define ACK_TYPE 'Y'
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#define NACK_TYPE 'N'
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#define BREAK_TYPE 'B'
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#define tochar(x) ((char) (((x) + SPACE) & 0xff))
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#define untochar(x) ((int) (((x) - SPACE) & 0xff))
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#define DEF_FILE "image.bin"
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static int ofd; /* output file descriptor */
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/* Size of my buffer to write to o/p file */
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#define MAX_WRITE_BUFFER 4096 /* Write size to o/p file */
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static char *write_buffer; /* buffer for finalized data to write */
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static int write_idx; /* index to the current location in buffer */
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static char his_eol; /* character he needs at end of packet */
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static int his_pad_count; /* number of pad chars he needs */
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static char his_pad_char; /* pad chars he needs */
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static char his_quote; /* quote chars he'll use */
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static void send_pad(void)
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{
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int count = his_pad_count;
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while (count-- > 0)
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console_putc(CONSOLE_STDOUT, his_pad_char);
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}
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/* converts escaped kermit char to binary char */
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static char ktrans(char in)
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{
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if ((in & 0x60) == 0x40) {
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return (char)(in & ~0x40);
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} else if ((in & 0x7f) == 0x3f) {
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return (char)(in | 0x40);
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} else
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return in;
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}
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static int chk1(char *buffer)
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{
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int total = 0;
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while (*buffer) {
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total += *buffer++;
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}
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return (int)((total + ((total >> 6) & 0x03)) & 0x3f);
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}
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static void s1_sendpacket(char *packet)
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{
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send_pad();
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while (*packet) {
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console_putc(CONSOLE_STDOUT, *packet++);
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}
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}
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static char a_b[24];
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static void send_ack(int n)
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{
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a_b[0] = START_CHAR;
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a_b[1] = tochar(3);
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a_b[2] = tochar(n);
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a_b[3] = ACK_TYPE;
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a_b[4] = '\0';
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a_b[4] = tochar(chk1(&a_b[1]));
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a_b[5] = his_eol;
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a_b[6] = '\0';
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s1_sendpacket(a_b);
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}
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static void send_nack(int n)
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{
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a_b[0] = START_CHAR;
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a_b[1] = tochar(3);
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a_b[2] = tochar(n);
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a_b[3] = NACK_TYPE;
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a_b[4] = '\0';
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a_b[4] = tochar(chk1(&a_b[1]));
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a_b[5] = his_eol;
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a_b[6] = '\0';
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s1_sendpacket(a_b);
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}
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/* os_data_* data buffer handling before flushing the data to the o/p device
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* we will only dump valid packets to the device.
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*/
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static int os_data_count, os_old_count, os_data_total;
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static char *os_data_addr, *os_old_buffer;
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static void os_data_init(void)
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{
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os_data_count = 0;
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os_old_count = 0;
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os_data_addr = NULL;
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os_old_buffer = NULL;
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}
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static int os_data_alloc(int length)
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{
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/* If already allocated, free the memory
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*/
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if (os_data_addr != NULL) {
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os_data_addr -= os_data_count;
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free(os_data_addr);
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}
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os_data_count = 0;
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os_data_addr = (char *)malloc(length);
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if (os_data_addr == NULL)
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return -1;
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return 0;
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}
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static int os_data_save(void)
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{
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int ret = 0;
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int copy_size;
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/* if there was an old data, flush it */
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if (os_old_buffer) {
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char *ori_buf = os_old_buffer;
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do {
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if (write_idx == MAX_WRITE_BUFFER) {
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ret = write(ofd, write_buffer,
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MAX_WRITE_BUFFER);
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if (ret < 0) {
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fprintf(stderr,
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"write to device failed\n");
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return ret;
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}
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write_idx = 0;
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}
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copy_size = min(os_old_count, (MAX_WRITE_BUFFER -
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write_idx));
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memcpy(write_buffer + write_idx, os_old_buffer,
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copy_size);
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write_idx += copy_size;
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os_data_total += copy_size;
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os_old_count -= copy_size;
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os_old_buffer += copy_size;
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} while (os_old_count); /* if remaining bytes */
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free(ori_buf);
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}
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os_old_count = os_data_count;
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os_old_buffer = os_data_addr - os_data_count;
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os_data_count = 0;
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os_data_addr = NULL;
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return 0;
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}
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static void os_data_dump(void)
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{
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if (os_old_buffer)
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free(os_old_buffer);
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if (os_data_addr) {
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os_data_addr -= os_data_count;
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free(os_data_addr);
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}
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os_data_init();
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}
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static void os_data_char(char new_char)
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{
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*os_data_addr++ = new_char;
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os_data_count++;
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}
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/* k_data_* simply handles the kermit escape translations */
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static int k_data_escape, k_data_escape_saved;
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static void k_data_init(void)
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{
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k_data_escape = 0;
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}
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static void k_data_save(void)
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{
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k_data_escape_saved = k_data_escape;
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}
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static void k_data_restore(void)
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{
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k_data_escape = k_data_escape_saved;
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}
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static void k_data_char(char new_char)
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{
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if (k_data_escape) {
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/* last char was escape - translate this character */
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os_data_char(ktrans(new_char));
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k_data_escape = 0;
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} else {
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if (new_char == his_quote) {
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/* this char is escape - remember */
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k_data_escape = 1;
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} else {
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/* otherwise send this char as-is */
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os_data_char(new_char);
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}
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}
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}
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#define SEND_DATA_SIZE 20
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static char send_parms[SEND_DATA_SIZE];
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static char *send_ptr;
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/**
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* @brief interprets the protocol info and builds and
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* sends an appropriate ack for what we can do
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*
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* @param n sequence
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*
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* @return void
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*/
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static void handle_send_packet(int n)
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{
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int length = 3;
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int bytes;
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/* initialize some protocol parameters */
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his_eol = END_CHAR; /* default end of line character */
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his_pad_count = 0;
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his_pad_char = '\0';
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his_quote = K_ESCAPE;
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/* ignore last character if it filled the buffer */
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if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
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--send_ptr;
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bytes = send_ptr - send_parms; /* how many bytes we'll process */
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do {
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if (bytes-- <= 0)
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break;
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/* handle MAXL - max length */
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/* ignore what he says - most I'll take (here) is 94 */
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a_b[++length] = tochar(94);
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if (bytes-- <= 0)
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break;
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/* handle TIME - time you should wait for my packets */
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/* ignore what he says - don't wait for my ack longer than 1 second */
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a_b[++length] = tochar(1);
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if (bytes-- <= 0)
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break;
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/* handle NPAD - number of pad chars I need */
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/* remember what he says - I need none */
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his_pad_count = untochar(send_parms[2]);
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a_b[++length] = tochar(0);
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if (bytes-- <= 0)
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break;
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/* handle PADC - pad chars I need */
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/* remember what he says - I need none */
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his_pad_char = ktrans(send_parms[3]);
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a_b[++length] = 0x40; /* He should ignore this */
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if (bytes-- <= 0)
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break;
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/* handle EOL - end of line he needs */
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/* remember what he says - I need CR */
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his_eol = untochar(send_parms[4]);
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a_b[++length] = tochar(END_CHAR);
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if (bytes-- <= 0)
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break;
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/* handle QCTL - quote control char he'll use */
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/* remember what he says - I'll use '#' */
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his_quote = send_parms[5];
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a_b[++length] = '#';
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if (bytes-- <= 0)
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break;
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/* handle QBIN - 8-th bit prefixing */
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/* ignore what he says - I refuse */
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a_b[++length] = 'N';
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if (bytes-- <= 0)
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break;
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/* handle CHKT - the clock check type */
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/* ignore what he says - I do type 1 (for now) */
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a_b[++length] = '1';
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if (bytes-- <= 0)
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break;
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/* handle REPT - the repeat prefix */
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/* ignore what he says - I refuse (for now) */
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a_b[++length] = 'N';
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if (bytes-- <= 0)
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break;
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/* handle CAPAS - the capabilities mask */
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/* ignore what he says - I only do long packets - I don't do windows */
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a_b[++length] = tochar(2); /* only long packets */
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a_b[++length] = tochar(0); /* no windows */
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a_b[++length] = tochar(94); /* large packet msb */
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a_b[++length] = tochar(94); /* large packet lsb */
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} while (0);
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a_b[0] = START_CHAR;
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a_b[1] = tochar(length);
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a_b[2] = tochar(n);
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a_b[3] = ACK_TYPE;
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a_b[++length] = '\0';
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a_b[length] = tochar(chk1(&a_b[1]));
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a_b[++length] = his_eol;
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a_b[++length] = '\0';
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s1_sendpacket(a_b);
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}
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/**
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* @brief receives a OS Open image file over kermit line
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*
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* @return bytes read
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*/
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static int k_recv(void)
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{
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char new_char;
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char k_state, k_state_saved;
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int sum;
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int done;
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int length;
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int n, last_n;
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int z = 0;
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int len_lo, len_hi;
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/* initialize some protocol parameters */
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his_eol = END_CHAR; /* default end of line character */
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his_pad_count = 0;
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his_pad_char = '\0';
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his_quote = K_ESCAPE;
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/* initialize the k_recv and k_data state machine */
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done = 0;
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k_state = 0;
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k_data_init();
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k_state_saved = k_state;
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k_data_save();
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os_data_init();
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os_data_total = 0;
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n = 0; /* just to get rid of a warning */
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last_n = -1;
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/* expect this "type" sequence (but don't check):
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S: send initiate
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F: file header
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D: data (multiple)
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Z: end of file
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B: break transmission
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*/
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/* enter main loop */
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while (!done) {
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/* set the send packet pointer to begining of send packet parms */
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send_ptr = send_parms;
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/* With each packet, start summing the bytes starting with the length.
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Save the current sequence number.
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Note the type of the packet.
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If a character less than SPACE (0x20) is received - error.
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*/
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/* get a packet */
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/* wait for the starting character or ^C */
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for (;;) {
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switch (getc()) {
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case START_CHAR: /* start packet */
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goto START;
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case ETX_CHAR: /* ^C waiting for packet */
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/* Save last success buffer and quit */
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(void)os_data_save();
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return (0);
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default:
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;
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}
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}
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START:
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/* get length of packet */
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sum = 0;
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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length = untochar(new_char);
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/* get sequence number */
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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n = untochar(new_char);
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--length;
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/* NEW CODE - check sequence numbers for retried packets */
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/* Note - this new code assumes that the sequence number is correctly
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* received. Handling an invalid sequence number adds another layer
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* of complexity that may not be needed - yet! At this time, I'm hoping
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* that I don't need to buffer the incoming data packets and can write
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* the data into memory in real time.
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*/
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if (n == last_n) {
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/* same sequence number, restore the previous state */
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k_state = k_state_saved;
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k_data_restore();
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/* Dump any previously allocated data including previous
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* buffer host wishes to retry.. */
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os_data_dump();
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} else {
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/* new sequence number, checkpoint the download */
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last_n = n;
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k_state_saved = k_state;
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k_data_save();
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}
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/* END NEW CODE */
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/* get packet type */
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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k_state = new_char;
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--length;
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/* check for extended length */
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if (length == -2) {
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/* (length byte was 0, decremented twice) */
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/* get the two length bytes */
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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len_hi = untochar(new_char);
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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len_lo = untochar(new_char);
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length = len_hi * 95 + len_lo;
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/* check header checksum */
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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if (new_char !=
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tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
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goto packet_error;
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sum += new_char & 0xff;
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/* --length;
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* new length includes only data and block check to come
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*/
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}
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/* Try to allocate data chunk */
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if (length > 1) {
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if (os_data_alloc(length) < 0) {
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/* too large.. NACK the data back */
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goto packet_error;
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}
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}
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while (length > 1) {
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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sum += new_char & 0xff;
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--length;
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if (k_state == DATA_TYPE) {
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/* pass on the data if this is a data packet */
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k_data_char(new_char);
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} else if (k_state == SEND_TYPE) {
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/* save send pack in buffer as is */
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*send_ptr++ = new_char;
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/* if too much data, back off the pointer */
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if (send_ptr >= &send_parms[SEND_DATA_SIZE])
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--send_ptr;
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}
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}
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/* get and validate checksum character */
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new_char = getc();
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if ((new_char & 0xE0) == 0)
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goto packet_error;
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if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
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goto packet_error;
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/* get END_CHAR */
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new_char = getc();
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if (new_char != END_CHAR) {
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packet_error:
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/* restore state machines */
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k_state = k_state_saved;
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k_data_restore();
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/* send a negative acknowledge packet in */
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send_nack(n);
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} else if (k_state == SEND_TYPE) {
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/* crack the protocol parms, build an appropriate ack packet */
|
|
handle_send_packet(n);
|
|
} else {
|
|
/* send simple acknowledge packet in */
|
|
send_ack(n);
|
|
/* Flush old buffer,
|
|
* Store current buffer as old buffer */
|
|
os_data_save();
|
|
/* quit if end of transmission */
|
|
if (k_state == BREAK_TYPE) {
|
|
/* Flush remaining buffer */
|
|
os_data_save();
|
|
done = 1;
|
|
}
|
|
}
|
|
++z;
|
|
}
|
|
return ((ulong) os_data_total);
|
|
}
|
|
|
|
/**
|
|
* @brief loadb Support over kermit protocol
|
|
*
|
|
* @return download size
|
|
*/
|
|
static ulong load_serial_bin(void)
|
|
{
|
|
int size, i;
|
|
char buf[32];
|
|
|
|
/* Try to allocate the buffer we shall write to files */
|
|
write_buffer = malloc(MAX_WRITE_BUFFER);
|
|
if (write_buffer == NULL) {
|
|
fprintf(stderr, "could not allocate file i/o buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Lets get the image from host */
|
|
size = k_recv();
|
|
|
|
/*
|
|
* Gather any trailing characters (for instance, the ^D which
|
|
* is sent by 'cu' after sending a file), and give the
|
|
* box some time (100 * 1 ms)
|
|
*/
|
|
for (i = 0; i < 100; ++i) {
|
|
if (tstc())
|
|
(void)getc();
|
|
udelay(1000);
|
|
}
|
|
|
|
/* Flush out the remaining data if any */
|
|
if (write_idx > 0) {
|
|
i = write(ofd, write_buffer, write_idx);
|
|
if (i < 0) {
|
|
fprintf(stderr, "write to device failed\n");
|
|
size = i;
|
|
goto err_quit;
|
|
}
|
|
write_idx = 0;
|
|
}
|
|
printf("## Total Size = 0x%08x = %d Bytes\n", size, size);
|
|
sprintf(buf, "%X", size);
|
|
setenv("filesize", buf);
|
|
|
|
err_quit:
|
|
free(write_buffer);
|
|
return size;
|
|
}
|
|
|
|
/**
|
|
* @brief provide the loadb(Kermit) or loadY mode support
|
|
*
|
|
* @param cmdtp
|
|
* @param argc
|
|
* @param argv
|
|
*
|
|
* @return success or failure
|
|
*/
|
|
static int do_load_serial_bin(int argc, char *argv[])
|
|
{
|
|
ulong offset = 0;
|
|
ulong addr;
|
|
int load_baudrate = 0, current_baudrate;
|
|
int rcode = 0, ret;
|
|
int opt;
|
|
char *output_file = NULL;
|
|
struct console_device *cdev = NULL;
|
|
|
|
while ((opt = getopt(argc, argv, "f:b:o:c")) > 0) {
|
|
switch (opt) {
|
|
case 'f':
|
|
output_file = optarg;
|
|
break;
|
|
case 'b':
|
|
load_baudrate = (int)simple_strtoul(optarg, NULL, 10);
|
|
break;
|
|
case 'o':
|
|
offset = (int)simple_strtoul(optarg, NULL, 10);
|
|
break;
|
|
default:
|
|
perror(argv[0]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
cdev = console_get_first_active();
|
|
if (NULL == cdev) {
|
|
printf("%s:No console device with STDIN and STDOUT\n", argv[0]);
|
|
return -ENODEV;
|
|
}
|
|
current_baudrate = console_get_baudrate(cdev);
|
|
|
|
/* Load Defaults */
|
|
if (load_baudrate == 0)
|
|
load_baudrate = current_baudrate;
|
|
if (NULL == output_file)
|
|
output_file = DEF_FILE;
|
|
|
|
/* File should exist */
|
|
ofd = open(output_file, O_WRONLY | O_CREAT);
|
|
if (ofd < 0) {
|
|
perror(argv[0]);
|
|
return 3;
|
|
}
|
|
/* Seek to the right offset */
|
|
if (offset) {
|
|
int seek = lseek(ofd, offset, SEEK_SET);
|
|
if (seek != offset) {
|
|
close(ofd);
|
|
ofd = 0;
|
|
perror(argv[0]);
|
|
return 4;
|
|
}
|
|
}
|
|
|
|
ret = console_set_baudrate(cdev, load_baudrate);
|
|
if (ret)
|
|
return ret;
|
|
|
|
printf("## Ready for binary (kermit) download "
|
|
"to 0x%08lX offset on %s device at %d bps...\n", offset,
|
|
output_file, load_baudrate);
|
|
addr = load_serial_bin();
|
|
if (addr == 0) {
|
|
printf("## Binary (kermit) download aborted\n");
|
|
rcode = 1;
|
|
}
|
|
|
|
ret = console_set_baudrate(cdev, current_baudrate);
|
|
if (ret)
|
|
return ret;
|
|
|
|
close(ofd);
|
|
ofd = 0;
|
|
return rcode;
|
|
}
|
|
|
|
BAREBOX_CMD_HELP_START(loadb)
|
|
BAREBOX_CMD_HELP_TEXT("")
|
|
BAREBOX_CMD_HELP_TEXT("Options:")
|
|
BAREBOX_CMD_HELP_OPT("-f FILE", "download to FILE (default image.bin")
|
|
BAREBOX_CMD_HELP_OPT("-o OFFS", "destination file OFFSet (default 0)")
|
|
BAREBOX_CMD_HELP_OPT("-b BAUD", "baudrate for download (default: console baudrate")
|
|
BAREBOX_CMD_HELP_END
|
|
|
|
BAREBOX_CMD_START(loadb)
|
|
.cmd = do_load_serial_bin,
|
|
BAREBOX_CMD_DESC("load binary file over serial line (Kermit)")
|
|
BAREBOX_CMD_OPTS(" FILE")
|
|
BAREBOX_CMD_GROUP(CMD_GRP_BOOT)
|
|
BAREBOX_CMD_HELP(cmd_loadb_help)
|
|
BAREBOX_CMD_END
|