rt-thread/components/utilities/zmodem/sz.c

322 lines
7.9 KiB
C

/*
* File : sz.c
* the implemention of sending files to the remote computers
* through the zmodem protocol.
* Change Logs:
* Date Author Notes
* 2011-03-29 itspy
*/
#include <rtthread.h>
#include <finsh.h>
#include <shell.h>
#include <rtdef.h>
#include <dfs.h>
#include <dfs_file.h>
#include <dfs_posix.h>
#include "zdef.h"
static rt_uint8_t TX_BUFFER[TX_BUFFER_SIZE]; /* sender buffer */
static rt_uint8_t file_cnt = 0; /* count of number of files opened */
static rt_uint8_t Rxflags = 0; /* rx parameter flags */
static rt_uint8_t ZF2_OP; /* file transfer option */
void zs_start(char *path);
static void zsend_init(void);
static rt_err_t zsend_files(struct zfile *zf);
static rt_err_t zsend_file(struct zfile *zf, rt_uint8_t *buf, rt_uint16_t len);
static rt_err_t zsend_file_data(struct zfile *zf);
static rt_uint16_t zfill_buffer(struct zfile *zf, rt_uint8_t *buf, rt_uint16_t size);
static rt_err_t zget_sync(void);
static void zsay_bibi(void);
/* start zmodem send process */
void zs_start(char *path)
{
struct zfile *zf;
rt_err_t res = RT_ERROR;
char *p,*q;
zf = rt_malloc(sizeof(struct zfile));
if (zf == RT_NULL)
{
rt_kprintf("zf: out of memory\r\n");
return;
}
rt_kprintf("\r\nsz: ready...\r\n"); /* here ready to send things */
memset(zf, 0, sizeof(struct zfile));
zf->fname = path;
zf->fd = -1;
res = zsend_files(zf);
p = zf->fname;
for (;;)
{
q = strstr(p,"/");
if (q == RT_NULL) break;
p = q+1;
}
if (res == RT_EOK)
{
rt_kprintf("\r\nfile: %s \r\nsize: %ld bytes\r\nsend completed.\r\n",
p,zf->bytes_received);
}
else
{
rt_kprintf("\r\nfile: %s \r\nsize: 0 bytes\r\nsend failed.\r\n",p);
}
rt_free(zf);
return;
}
/* init the parameters */
static void zsend_init(void)
{
rt_err_t res = -RT_ERROR;
zinit_parameter();
for(;;) /* wait ZPAD */
{
res = zread_line(800);
if (res == ZPAD) break;
}
for (;;)
{
res = zget_header(rx_header);
if (res == ZRINIT) break;
}
if ((rx_header[ZF1] & ZRQNVH))
{
zput_pos(0x80L); /* Show we can var header */
zsend_hex_header(ZRQINIT, tx_header);
}
Rxflags = rx_header[ZF0] & 0377;
if (Rxflags & CANFC32) Txfcs32 = 1; /* used 32bits CRC check */
if (ZF2_OP == ZTRLE && (Rxflags & CANRLE)) /* for RLE packet */
Txfcs32 = 2;
else
ZF2_OP = 0;
/* send SINIT cmd */
return;
}
/* send files */
static rt_err_t zsend_files(struct zfile *zf)
{
char *p,*q;
char *str = "/";
struct stat finfo;
rt_err_t res = -RT_ERROR;
if (zf->fname == RT_NULL)
{
rt_kprintf("\r\nerror: no file to be send.\r\n");
return res;
}
if ((zf->fd=open(zf->fname, DFS_O_RDONLY,0)) <0)
{
rt_kprintf("\r\ncan not open file:%s\r\n",zf->fname+1);
return res;
}
zf->file_end = 0;
++file_cnt;
/* extract file name */
p = zf->fname;
for (;;)
{
q = strstr(p,str);
if (q == RT_NULL) break;
p = q+1;
}
q = (char*)TX_BUFFER;
for (;;)
{
*q++ = *p++;
if (*p == 0) break;
}
*q++ = 0;
p=q;
while (q < (char*)(TX_BUFFER + 1024))
*q++ = 0;
/* get file attributes */
fstat(zf->fd,&finfo);
Left_sizes += finfo.st_size;
rt_sprintf(p, "%lu %lo %o 3 %d %ld", (long)finfo.st_size, finfo.st_mtime,
finfo.st_mode, file_cnt, Left_sizes);
Left_sizes -= finfo.st_size;
TX_BUFFER[127] = (finfo.st_size + 127) >>7;
TX_BUFFER[126] = (finfo.st_size + 127) >>15;
zsend_init();
/* start sending files */
res = zsend_file(zf,TX_BUFFER, (p-(char*)TX_BUFFER)+strlen(p)+1);
zsay_bibi();
close(zf->fd);
return res;
}
/* send file name and related info */
static rt_err_t zsend_file(struct zfile *zf, rt_uint8_t *buf, rt_uint16_t len)
{
rt_uint8_t cnt;
rt_err_t res = -RT_ERROR;
for (cnt=0;cnt<5;cnt++)
{
tx_header[ZF0] = ZF0_CMD; /* file conversion option */
tx_header[ZF1] = ZF1_CMD; /* file management option */
tx_header[ZF2] = (ZF3_CMD|ZF2_OP); /* file transfer option */
tx_header[ZF3] = ZF3_CMD;
zsend_bin_header(ZFILE, tx_header);
zsend_bin_data(buf, len, ZCRCW);
loop:
res = zget_header(rx_header);
switch (res)
{
case ZRINIT:
while ((res = zread_line(50)) > 0)
{
if (res == ZPAD)
{
goto loop;
}
}
break;
case ZCAN:
case TIMEOUT:
case ZABORT:
case ZFIN:
break;
case -RT_ERROR:
case ZNAK:
break;
case ZCRC: /* no CRC request */
goto loop;
case ZFERR:
case ZSKIP:
break;
case ZRPOS: /* here we want */
zget_pos(Rxpos);
Txpos = Rxpos;
return(zsend_file_data(zf));
default:
break;
}
}
return res;
}
/* send the file data */
static rt_err_t zsend_file_data(struct zfile *zf)
{
rt_int16_t cnt;
rt_uint8_t cmd;
rt_err_t res = -RT_ERROR;
/* send ZDATA packet, start to send data */
start_send:
zput_pos(Txpos);
zsend_bin_header(ZDATA, tx_header);
do
{
cnt = zfill_buffer(zf,TX_BUFFER,RX_BUFFER_SIZE);
if (cnt < RX_BUFFER_SIZE )
cmd = ZCRCE;
else
cmd = ZCRCG;
zsend_bin_data(TX_BUFFER, cnt, cmd);
zf->bytes_received= Txpos += cnt;
if (cmd == ZCRCW)
goto get_syn1;
} while (cnt == RX_BUFFER_SIZE);
for (;;) /* get ack and check if send finish */
{
zput_pos(Txpos);
zsend_bin_header(ZEOF, tx_header);
get_syn1:
res = zget_sync();
switch (res)
{
case ZACK:
goto get_syn1;
case ZNAK:
continue;
case ZRPOS: /* resend here */
lseek(zf->fd,Txpos,0);
goto start_send;
case ZRINIT: /* send finish,then begin to send next file */
return RT_EOK;
case ZSKIP:
case -RT_ERROR:
return res;
default:
return res;
}
}
}
/* fill file data to buffer*/
static rt_uint16_t zfill_buffer(struct zfile *zf, rt_uint8_t *buf, rt_uint16_t size)
{
return (read(zf->fd,buf,size));
}
/* wait sync(ack) from the receiver */
static rt_err_t zget_sync(void)
{
rt_err_t res = -RT_ERROR;
for (;;)
{
res = zget_header(rx_header);
switch (res)
{
case ZCAN:
case ZABORT:
case ZFIN:
case TIMEOUT:
return -RT_ERROR;
case ZRPOS: /* get pos, need to resend */
zget_pos(Rxpos);
Txpos = Rxpos;
return res;
case ZACK:
return res;
case ZRINIT: /* get ZRINIT indicate that the prev file send completed */
return res;
case ZSKIP:
return res;
case -RT_ERROR:
default:
zsend_bin_header(ZNAK, tx_header);
continue;
}
}
}
/* say "bibi" to the receiver */
static void zsay_bibi(void)
{
for (;;)
{
zput_pos(0L); /* reninit position of next file*/
zsend_hex_header(ZFIN, tx_header); /* send finished session cmd */
switch (zget_header(rx_header))
{
case ZFIN:
zsend_line('O');
zsend_line('O');
case ZCAN:
case TIMEOUT:
return;
}
}
}
/* end of sz.c */