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tftp: add optiona support for progress bar

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function                                             old     new   delta
tftp_protocol                                       1662    1834    +172
progress_meter                                       212     365    +153
tftp_progress_init                                     -      14     +14
tftp_main                                            276     281      +5
tftpd_main                                           513     500     -13
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/1 up/down: 344/-13)           Total: 331 bytes

Signed-off-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Magnus Damm 2009-11-08 18:03:09 +01:00 committed by Denys Vlasenko
parent bbd423530f
commit 8bd0af9962
2 changed files with 84 additions and 18 deletions
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11
networking/Config.in
View File

@ -846,12 +846,19 @@ config FEATURE_TFTP_PUT
Also enable download support in tftpd, if tftpd is selected.
config FEATURE_TFTP_BLOCKSIZE
bool "Enable \"blksize\" protocol option"
bool "Enable 'blksize' and 'tsize' protocol options"
default n
depends on TFTP || TFTPD
help
Allow tftp to specify block size, and tftpd to understand
"blksize" option.
"blksize" and "tsize" options.
config FEATURE_TFTP_PROGRESS_BAR
bool "Enable tftp progress meter"
default n
depends on TFTP && FEATURE_TFTP_BLOCKSIZE
help
Show progress bar.
config TFTP_DEBUG
bool "Enable debug"

91
networking/tftp.c
View File

@ -84,8 +84,17 @@ struct globals {
char *user_opt;
/* used in tftpd_main(), a bit big for stack: */
char block_buf[TFTP_BLKSIZE_DEFAULT];
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
off_t pos;
off_t size;
const char *file;
bb_progress_t pmt;
#endif
};
#define G (*(struct globals*)&bb_common_bufsiz1)
struct BUG_G_too_big {
char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
};
#define block_buf (G.block_buf )
#define user_opt (G.user_opt )
#define error_pkt (G.error_pkt )
@ -94,6 +103,45 @@ struct globals {
#define error_pkt_reason (error_pkt[3])
#define error_pkt_str (error_pkt + 4)
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
/* SIGALRM logic nicked from the wget applet */
static void progress_meter(int flag)
{
/* We can be called from signal handler */
int save_errno = errno;
if (flag == -1) { /* first call to progress_meter */
bb_progress_init(&G.pmt);
}
bb_progress_update(&G.pmt, G.file, 0, G.pos, G.size);
if (flag == 0) {
/* last call to progress_meter */
alarm(0);
fputc('\n', stderr);
} else {
if (flag == -1) { /* first call to progress_meter */
signal_SA_RESTART_empty_mask(SIGALRM, progress_meter);
}
alarm(1);
}
errno = save_errno;
}
static void tftp_progress_init(const char *file)
{
G.file = file;
progress_meter(-1);
}
static void tftp_progress_done(void)
{
progress_meter(0);
}
#else
# define tftp_progress_init(file) ((void)0)
# define tftp_progress_done() ((void)0)
#endif
#if ENABLE_FEATURE_TFTP_BLOCKSIZE
@ -163,7 +211,7 @@ static int tftp_protocol(
# define remote_file NULL
#endif
/* 1 for tftp; 1/0 for tftpd depending whether client asked about it: */
IF_FEATURE_TFTP_BLOCKSIZE(, off_t transfer_size)
IF_FEATURE_TFTP_BLOCKSIZE(, int want_transfer_size)
IF_FEATURE_TFTP_BLOCKSIZE(, int blksize))
{
#if !ENABLE_FEATURE_TFTP_BLOCKSIZE
@ -269,7 +317,7 @@ static int tftp_protocol(
}
/* gcc 4.3.1 would NOT optimize it out as it should! */
#if ENABLE_FEATURE_TFTP_BLOCKSIZE
if (blksize != TFTP_BLKSIZE_DEFAULT || transfer_size) {
if (blksize != TFTP_BLKSIZE_DEFAULT || want_transfer_size) {
/* Create and send OACK packet. */
/* For the download case, block_nr is still 1 -
* we expect 1st ACK from peer to be for (block_nr-1),
@ -325,11 +373,11 @@ static int tftp_protocol(
cp += sizeof("octet");
# if ENABLE_FEATURE_TFTP_BLOCKSIZE
if (blksize == TFTP_BLKSIZE_DEFAULT && !transfer_size)
if (blksize == TFTP_BLKSIZE_DEFAULT && !want_transfer_size)
goto send_pkt;
/* Need to add option to pkt */
if ((&xbuf[io_bufsize - 1] - cp) < sizeof("blksize NNNNN tsize ") + sizeof(transfer_size)*3) {
if ((&xbuf[io_bufsize - 1] - cp) < sizeof("blksize NNNNN tsize ") + sizeof(off_t)*3) {
bb_error_msg("remote filename is too long");
goto ret;
}
@ -345,23 +393,25 @@ static int tftp_protocol(
cp += sizeof("blksize");
cp += snprintf(cp, 6, "%d", blksize) + 1;
}
if (transfer_size) {
if (want_transfer_size) {
/* add "tsize", <nul>, size, <nul> (see RFC2349) */
/* if tftp and downloading, we send "0" (since we opened local_fd with O_TRUNC)
* and this makes server to send "tsize" option with the size */
/* if tftp and uploading, we send file size (maybe dont, to not confuse old servers???) */
/* if tftpd and downloading, we are answering to client's request */
/* if tftpd and uploading: transfer_size == 0, this code is not executed */
/* if tftpd and uploading: !want_transfer_size, this code is not executed */
struct stat st;
strcpy(cp, "tsize");
cp += sizeof("tsize");
st.st_size = 0;
fstat(local_fd, &st);
cp += sprintf(cp, "%"OFF_FMT"u", (off_t)st.st_size) + 1;
# if 0 /*ENABLE_FEATURE_TFTP_PROGRESS_BAR*/
# if ENABLE_FEATURE_TFTP_PROGRESS_BAR
/* Save for progress bar. If 0 (tftp downloading),
* we look at server's reply later */
transfer_size = st.st_size;
G.size = st.st_size;
if (remote_file && st.st_size)
tftp_progress_init(remote_file);
# endif
}
#endif
@ -407,6 +457,12 @@ static int tftp_protocol(
fprintf(stderr, "\n");
#endif
xsendto(socket_fd, xbuf, send_len, &peer_lsa->u.sa, peer_lsa->len);
#if ENABLE_FEATURE_TFTP_PROGRESS_BAR
if (ENABLE_TFTP && remote_file) { /* tftp */
G.pos = (block_nr - 1) * (uoff_t)blksize;
}
#endif
/* Was it final ACK? then exit */
if (finished && (opcode == TFTP_ACK))
goto ret;
@ -505,11 +561,13 @@ static int tftp_protocol(
}
io_bufsize = blksize + 4;
}
# if 0 /*ENABLE_FEATURE_TFTP_PROGRESS_BAR*/
if (transfer_size == 0) { /* if we don't know it yet */
# if ENABLE_FEATURE_TFTP_PROGRESS_BAR
if (G.size == 0) { /* if we don't know it yet */
res = tftp_get_option("tsize", &rbuf[2], len - 2);
if (res) {
transfer_size = bb_strtoull(res, NULL, 10);
G.size = bb_strtoull(res, NULL, 10);
if (remote_file && G.size)
tftp_progress_init(remote_file);
}
}
# endif
@ -660,9 +718,10 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
result = tftp_protocol(
NULL /*our_lsa*/, peer_lsa,
local_file, remote_file
IF_FEATURE_TFTP_BLOCKSIZE(, 1 /* transfer_size */)
IF_FEATURE_TFTP_BLOCKSIZE(, 1 /* want_transfer_size */)
IF_FEATURE_TFTP_BLOCKSIZE(, blksize)
);
tftp_progress_done();
if (result != EXIT_SUCCESS && NOT_LONE_DASH(local_file) && CMD_GET(opt)) {
unlink(local_file);
@ -682,7 +741,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
const char *error_msg;
int opt, result, opcode;
IF_FEATURE_TFTP_BLOCKSIZE(int blksize = TFTP_BLKSIZE_DEFAULT;)
IF_FEATURE_TFTP_BLOCKSIZE(off_t transfer_size = 0;)
IF_FEATURE_TFTP_BLOCKSIZE(int want_transfer_size = 0;)
INIT_G();
@ -746,7 +805,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
}
/* did client ask us about file size? */
if (tftp_get_option("tsize", opt_str, opt_len)) {
transfer_size = 1;
want_transfer_size = 1;
}
}
}
@ -760,7 +819,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
goto err;
}
IF_GETPUT(option_mask32 |= TFTP_OPT_GET;) /* will receive file's data */
transfer_size = 0; /* do not send file size, it's meaningless */
want_transfer_size = 0; /* do not send file size, it's meaningless */
} else {
IF_GETPUT(option_mask32 |= TFTP_OPT_PUT;) /* will send file's data */
}
@ -774,7 +833,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
result = tftp_protocol(
our_lsa, peer_lsa,
local_file IF_TFTP(, NULL /*remote_file*/)
IF_FEATURE_TFTP_BLOCKSIZE(, transfer_size)
IF_FEATURE_TFTP_BLOCKSIZE(, want_transfer_size)
IF_FEATURE_TFTP_BLOCKSIZE(, blksize)
);