375 lines
8.7 KiB
C
375 lines
8.7 KiB
C
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/*
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* File : rz.c
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* the implemention of receiving files from the remote computers
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* through the zmodem protocol.
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* Change Logs:
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* Date Author Notes
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* 2011-03-29 itspy
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*/
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#include <rtthread.h>
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#include <finsh.h>
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#include <shell.h>
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#include <rtdef.h>
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#include <dfs.h>
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#include <dfs_file.h>
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#include <dfs_posix.h>
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#include <stdio.h>
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#include "zdef.h"
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void zr_start(char *path);
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static rt_err_t zrec_init(rt_uint8_t *rxbuf,struct zfile *zf);
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static rt_err_t zrec_files(struct zfile *zf);
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static rt_err_t zwrite_file(rt_uint8_t *buf,rt_uint16_t size,struct zfile *zf);
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static rt_err_t zrec_file_data(rt_uint8_t *buf,struct zfile *zf);;
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static rt_err_t zrec_file(rt_uint8_t *rxbuf,struct zfile *zf);
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static rt_err_t zget_file_info(char *name,struct zfile *zf);
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static rt_err_t zwrite_file(rt_uint8_t *buf,rt_uint16_t size,struct zfile *zf);
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static void zrec_ack_bibi(void);
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/* start zmodem receive proccess */
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void zr_start(char *path)
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{
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struct zfile *zf;
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rt_uint8_t n;
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char ch;
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rt_err_t res = -RT_ERROR;
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zf = rt_malloc(sizeof(struct zfile));
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if (zf == RT_NULL)
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{
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rt_kprintf("zf: out of memory\r\n");
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return;
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}
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memset(zf, 0, sizeof(struct zfile));
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zf->fname = path;
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zf->fd = -1;
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rt_kprintf("\r\n");
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res = zrec_files(zf);
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if (res == RT_EOK)
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{
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rt_kprintf("\b\b\bfile: %s \r\n",zf->fname+1);
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rt_kprintf("size: %ld bytes\r\n",zf->bytes_received);
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rt_kprintf("receive completed.\r\n");
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close(zf->fd);
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rt_free(zf);
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}
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else
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{
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rt_kprintf("\b\b\bfile: %s \r\n",zf->fname+1);
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rt_kprintf("size: 0 bytes\r\n");
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rt_kprintf("receive failed.\r\n");
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close(zf->fd);
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unlink(zf->fname); /* remove this file */
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rt_free(zf);
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}
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/* waiting,clear console buffer */
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rt_thread_delay(RT_TICK_PER_SECOND/2);
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while(1)
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{
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n=rt_device_read(shell->device, 0, &ch, 1);
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if (n == 0) break;
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}
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return ;
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}
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/* receiver init, wait for ack */
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static rt_err_t zrec_init(rt_uint8_t *rxbuf,struct zfile *zf)
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{
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rt_uint8_t err_cnt = 0;
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rt_err_t res = -RT_ERROR;
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for (;;)
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{
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zput_pos(0L);
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tx_header[ZF0] = ZF0_CMD;
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tx_header[ZF1] = ZF1_CMD;
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tx_header[ZF2] = ZF2_CMD;
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zsend_hex_header(ZRINIT, tx_header);
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again:
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res = zget_header(rx_header);
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switch(res)
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{
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case ZFILE:
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ZF0_CMD = rx_header[ZF0];
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ZF1_CMD = rx_header[ZF1];
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ZF2_CMD = rx_header[ZF2];
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ZF3_CMD = rx_header[ZF3];
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res = zget_data(rxbuf, RX_BUFFER_SIZE);
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if (res == GOTCRCW)
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{
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if (zget_file_info((char*)rxbuf,zf) != RT_EOK)
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{
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zsend_hex_header(ZSKIP, tx_header);
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return (res);
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}
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return RT_EOK;;
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}
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zsend_hex_header(ZNAK, tx_header);
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goto again;
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case ZSINIT:
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if (zget_data((rt_uint8_t*)Attn, ZATTNLEN) == GOTCRCW) /* send zack */
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{
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zsend_hex_header(ZACK, tx_header);
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goto again;
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}
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zsend_hex_header(ZNAK, tx_header); /* send znak */
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goto again;
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case ZRQINIT:
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continue;
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case ZEOF:
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continue;
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case ZCOMPL:
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goto again;
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case ZFIN: /* end file session */
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zrec_ack_bibi();
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return res;
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default:
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if (++err_cnt >1000) return -RT_ERROR;
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continue;
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}
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}
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}
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/* receive files */
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static rt_err_t zrec_files(struct zfile *zf)
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{
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rt_uint8_t *rxbuf;
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rt_err_t res = -RT_ERROR;
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zinit_parameter();
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rxbuf = rt_malloc(RX_BUFFER_SIZE*sizeof(rt_uint8_t));
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if (rxbuf == RT_NULL)
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{
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rt_kprintf("not enough memory\r\n");
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return -RT_ERROR;
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}
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rt_kprintf("rz: ready...\r\n"); /* here ready to receive things */
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if ((res = zrec_init(rxbuf,zf))!= RT_EOK)
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{
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rt_kprintf("receive init failed !\r\n");
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rt_free(rxbuf);
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return -RT_ERROR;
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}
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res = zrec_file(rxbuf,zf);
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if (res == ZFIN)
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{
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rt_free(rxbuf);
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return RT_EOK; /* if finish session */
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}
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else if (res == ZCAN)
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{
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rt_free(rxbuf);
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return ZCAN; /* cancel by sender */
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}
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else
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{
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zsend_can();
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rt_free(rxbuf);
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return res;
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}
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}
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/* receive file */
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static rt_err_t zrec_file(rt_uint8_t *rxbuf,struct zfile *zf)
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{
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rt_err_t res = - RT_ERROR;
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rt_uint16_t err_cnt = 0;
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do
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{
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zput_pos(zf->bytes_received);
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zsend_hex_header(ZRPOS, tx_header);
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again:
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res = zget_header(rx_header);
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switch (res)
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{
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case ZDATA:
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zget_pos(Rxpos);
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if (Rxpos != zf->bytes_received)
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{
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zsend_break(Attn);
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continue;
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}
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err_cnt = 0;
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res = zrec_file_data(rxbuf,zf);
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if (res == -RT_ERROR)
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{
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zsend_break(Attn);
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continue;
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}
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else if (res == GOTCAN) return res;
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else goto again;
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case ZRPOS:
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zget_pos(Rxpos);
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continue;
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case ZEOF:
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err_cnt = 0;
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zget_pos(Rxpos);
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if (Rxpos != zf->bytes_received || Rxpos != zf->bytes_total)
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{
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continue;
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}
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return (zrec_init(rxbuf,zf)); /* resend ZRINIT packet,ready to receive next file */
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case ZFIN:
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zrec_ack_bibi();
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return ZCOMPL;
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case ZCAN:
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#ifdef ZDEBUG
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rt_kprintf("error code: sender cancelled \r\n");
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#endif
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unlink(zf->fname);
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zf->bytes_received = 0L; /* throw the received data */
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return res;
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case ZSKIP:
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return res;
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case -RT_ERROR:
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zsend_break(Attn);
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continue;
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case ZNAK:
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case TIMEOUT:
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default:
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continue;
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}
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} while(++err_cnt < 100);
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return res;
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}
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/* proccess file infomation */
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static rt_err_t zget_file_info(char *name,struct zfile *zf)
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{
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char *p;
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char *ftemp,*ptr;
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rt_uint16_t i,len;
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rt_err_t res = -RT_ERROR;
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struct statfs buf;
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struct stat finfo;
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if (zf->fname == RT_NULL) /* extract file path */
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{
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len = strlen(name)+2;
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}
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else
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len = strlen(zf->fname)+strlen(name)+2;
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ftemp = rt_malloc(len);
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if (ftemp == RT_NULL)
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{
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rt_kprintf("ftemp: out of memory\n");
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return -RT_ERROR;
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}
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memset(ftemp,0,len);
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for (i=0,ptr=zf->fname;i<len-strlen(name)-2;i++)
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ftemp[i] = *ptr++;
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ftemp[len-strlen(name)-2] = '/';
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/* check if is a directory */
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if ((zf->fd=open(ftemp, DFS_O_DIRECTORY,0)) < 0)
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{
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rt_kprintf("can not open file:%s\r\n",zf->fname+1);
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close(zf->fd);
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zf->fd = -1;
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return res;
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}
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fstat(zf->fd, &finfo);
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if ((finfo.st_mode&S_IFDIR) != S_IFDIR)
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{
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close(zf->fd);
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zf->fd = -1;
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return res;
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}
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close(zf->fd);
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/* get fullpath && file attributes */
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strcat(ftemp,name);
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zf->fname = ftemp;
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p = strlen(name)+name+1;
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sscanf((const char *)p, "%ld%lo%o", &zf->bytes_total,&zf->ctime,&zf->mode);
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dfs_statfs(working_directory,&buf);
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if (zf->bytes_total > (buf.f_blocks * buf.f_bfree))
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{
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rt_kprintf(" not enough disk space !\r\n");
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return -RT_ERROR;
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}
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zf->bytes_received = 0L;
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if ((zf->fd = open(zf->fname,DFS_O_CREAT|DFS_O_WRONLY,0)) < 0) /* create or replace exist file */
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{
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rt_kprintf("can not create file:%s \r\n",zf->fname);
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rt_free(ftemp);
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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/* receive file data,continously, no ack */
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static rt_err_t zrec_file_data(rt_uint8_t *buf,struct zfile *zf)
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{
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rt_err_t res = -RT_ERROR;
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more_data:
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res = zget_data(buf,RX_BUFFER_SIZE);
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switch(res)
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{
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case GOTCRCW: /* zack received */
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zwrite_file(buf,Rxcount,zf);
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zf->bytes_received += Rxcount;
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zput_pos(zf->bytes_received);
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zsend_line(XON);
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zsend_hex_header(ZACK, tx_header);
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return RT_EOK;
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case GOTCRCQ:
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zwrite_file(buf,Rxcount,zf);
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zf->bytes_received += Rxcount;
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zput_pos(zf->bytes_received);
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zsend_hex_header(ZACK, tx_header);
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goto more_data;
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case GOTCRCG:
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zwrite_file(buf,Rxcount,zf);
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zf->bytes_received += Rxcount;
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goto more_data;
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case GOTCRCE:
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zwrite_file(buf,Rxcount,zf);
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zf->bytes_received += Rxcount;
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return RT_EOK;
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case GOTCAN:
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#ifdef ZDEBUG
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rt_kprintf("error code : ZCAN \r\n");
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#endif
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return res;
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case TIMEOUT:
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return res;
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case -RT_ERROR:
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zsend_break(Attn);
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return res;
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default:
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return res;
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}
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}
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/* write file */
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static rt_err_t zwrite_file(rt_uint8_t *buf,rt_uint16_t size,struct zfile *zf)
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{
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return (write(zf->fd,buf,size));
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}
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/* ack bibi */
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static void zrec_ack_bibi(void)
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{
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rt_uint8_t i;
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zput_pos(0L);
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for (i=0;i<3;i++)
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{
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zsend_hex_header(ZFIN, tx_header);
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switch (zread_line(100))
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{
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case 'O':
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zread_line(1);
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return;
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case RCDO:
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return;
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case TIMEOUT:
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default:
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break;
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}
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}
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}
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/* end of rz.c */
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