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tftp: extend tsize support a little

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function                                             old     new   delta
tftp_protocol                                       1624    1662     +38
tftpd_main                                           495     513     +18
tftp_main                                            274     276      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 58/0)               Total: 58 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 18:00:59 +01:00 committed by Denys Vlasenko
parent f5914992f3
commit bbd423530f
1 changed files with 57 additions and 39 deletions
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72
networking/tftp.c
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@ -154,19 +154,18 @@ static char *tftp_get_option(const char *option, char *buf, int len)
#endif
static int tftp_protocol(
len_and_sockaddr *our_lsa, /* NULL if tftp, !NULL if tftpd */
/* NULL if tftp, !NULL if tftpd: */
len_and_sockaddr *our_lsa,
len_and_sockaddr *peer_lsa,
const char *local_file
IF_TFTP(, const char *remote_file)
IF_FEATURE_TFTP_BLOCKSIZE(IF_TFTPD(, void *tsize))
IF_FEATURE_TFTP_BLOCKSIZE(, int blksize))
{
#if !ENABLE_TFTP
# define remote_file NULL
#endif
#if !(ENABLE_FEATURE_TFTP_BLOCKSIZE && ENABLE_TFTPD)
# define tsize 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 blksize))
{
#if !ENABLE_FEATURE_TFTP_BLOCKSIZE
enum { blksize = TFTP_BLKSIZE_DEFAULT };
#endif
@ -270,7 +269,7 @@ 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 || tsize) {
if (blksize != TFTP_BLKSIZE_DEFAULT || 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),
@ -321,16 +320,16 @@ static int tftp_protocol(
}
strcpy(cp, remote_file);
cp += len;
/* add "mode" part of the package */
/* add "mode" part of the packet */
strcpy(cp, "octet");
cp += sizeof("octet");
# if ENABLE_FEATURE_TFTP_BLOCKSIZE
if (blksize == TFTP_BLKSIZE_DEFAULT)
if (blksize == TFTP_BLKSIZE_DEFAULT && !transfer_size)
goto send_pkt;
/* Non-standard blocksize: add option to pkt */
if ((&xbuf[io_bufsize - 1] - cp) < sizeof("blksize NNNNN")) {
/* Need to add option to pkt */
if ((&xbuf[io_bufsize - 1] - cp) < sizeof("blksize NNNNN tsize ") + sizeof(transfer_size)*3) {
bb_error_msg("remote filename is too long");
goto ret;
}
@ -340,22 +339,31 @@ static int tftp_protocol(
#if ENABLE_FEATURE_TFTP_BLOCKSIZE
add_blksize_opt:
#if ENABLE_TFTPD
if (tsize) {
struct stat st;
/* add "tsize", <nul>, size, <nul> */
strcpy(cp, "tsize");
cp += sizeof("tsize");
fstat(local_fd, &st);
cp += snprintf(cp, 10, "%u", (int) st.st_size) + 1;
}
#endif
if (blksize != TFTP_BLKSIZE_DEFAULT) {
/* add "blksize", <nul>, blksize, <nul> */
strcpy(cp, "blksize");
cp += sizeof("blksize");
cp += snprintf(cp, 6, "%d", blksize) + 1;
}
if (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 */
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*/
/* Save for progress bar. If 0 (tftp downloading),
* we look at server's reply later */
transfer_size = st.st_size;
# endif
}
#endif
/* First packet is built, so skip packet generation */
goto send_pkt;
@ -497,6 +505,14 @@ 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 */
res = tftp_get_option("tsize", &rbuf[2], len - 2);
if (res) {
transfer_size = bb_strtoull(res, NULL, 10);
}
}
# endif
if (CMD_GET(option_mask32)) {
/* We'll send ACK for OACK,
* such ACK has "block no" of 0 */
@ -578,7 +594,6 @@ static int tftp_protocol(
&peer_lsa->u.sa, peer_lsa->len);
return EXIT_FAILURE;
#undef remote_file
#undef tsize
}
#if ENABLE_TFTP
@ -645,7 +660,7 @@ 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(IF_TFTPD(, NULL /*tsize*/))
IF_FEATURE_TFTP_BLOCKSIZE(, 1 /* transfer_size */)
IF_FEATURE_TFTP_BLOCKSIZE(, blksize)
);
@ -667,7 +682,7 @@ 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(char *tsize = NULL;)
IF_FEATURE_TFTP_BLOCKSIZE(off_t transfer_size = 0;)
INIT_G();
@ -730,7 +745,9 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
}
}
/* did client ask us about file size? */
tsize = tftp_get_option("tsize", opt_str, opt_len);
if (tftp_get_option("tsize", opt_str, opt_len)) {
transfer_size = 1;
}
}
}
# endif
@ -743,6 +760,7 @@ 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 */
} else {
IF_GETPUT(option_mask32 |= TFTP_OPT_PUT;) /* will send file's data */
}
@ -756,7 +774,7 @@ 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(, tsize)
IF_FEATURE_TFTP_BLOCKSIZE(, transfer_size)
IF_FEATURE_TFTP_BLOCKSIZE(, blksize)
);