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Diffstat (limited to 'networking')
-rw-r--r--networking/tftp.c96
1 files changed, 57 insertions, 39 deletions
diff --git a/networking/tftp.c b/networking/tftp.c
index 9b08c14..c2d3ccf 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -110,9 +110,9 @@ static int tftp_blksize_check(const char *blksize_str, int maxsize)
bb_error_msg("bad blocksize '%s'", blksize_str);
return -1;
}
-#if ENABLE_TFTP_DEBUG
+# if ENABLE_TFTP_DEBUG
bb_error_msg("using blksize %u", blksize);
-#endif
+# endif
return blksize;
}
@@ -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),
@@ -321,41 +320,50 @@ 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 ENABLE_FEATURE_TFTP_BLOCKSIZE
+ 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;
}
expect_OACK = 1;
-#endif
+# endif
#endif /* ENABLE_TFTP */
#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
@@ -589,10 +604,10 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
len_and_sockaddr *peer_lsa;
const char *local_file = NULL;
const char *remote_file = NULL;
-#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+# if ENABLE_FEATURE_TFTP_BLOCKSIZE
const char *blksize_str = TFTP_BLKSIZE_DEFAULT_STR;
int blksize;
-#endif
+# endif
int result;
int port;
IF_GETPUT(int opt;)
@@ -610,7 +625,7 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
IF_FEATURE_TFTP_BLOCKSIZE(, &blksize_str));
argv += optind;
-#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+# if ENABLE_FEATURE_TFTP_BLOCKSIZE
/* Check if the blksize is valid:
* RFC2348 says between 8 and 65464 */
blksize = tftp_blksize_check(blksize_str, 65564);
@@ -618,7 +633,7 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
//bb_error_msg("bad block size");
return EXIT_FAILURE;
}
-#endif
+# endif
if (remote_file) {
if (!local_file) {
@@ -636,16 +651,16 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
port = bb_lookup_port(argv[1], "udp", 69);
peer_lsa = xhost2sockaddr(argv[0], port);
-#if ENABLE_TFTP_DEBUG
+# if ENABLE_TFTP_DEBUG
fprintf(stderr, "using server '%s', remote_file '%s', local_file '%s'\n",
xmalloc_sockaddr2dotted(&peer_lsa->u.sa),
remote_file, local_file);
-#endif
+# endif
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();
@@ -714,7 +729,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
if (mode >= block_buf + result || strcmp(mode, "octet") != 0) {
goto err;
}
-#if ENABLE_FEATURE_TFTP_BLOCKSIZE
+# if ENABLE_FEATURE_TFTP_BLOCKSIZE
{
char *res;
char *opt_str = mode + sizeof("octet");
@@ -730,10 +745,12 @@ 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
+# endif
if (!ENABLE_FEATURE_TFTP_PUT || opcode == TFTP_WRQ) {
if (opt & TFTPD_OPT_r) {
@@ -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)
);
generated by cgit v1.1 at 2024-11-01 05:25:05 +0000