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authorDenys Vlasenko <vda.linux@googlemail.com>2009-07-25 01:56:23 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2009-07-25 01:56:23 +0200
commitbac9f03ed85cb0a6887a8a7e9508e043edb792e8 (patch)
tree371bbeac46d88078636f33cbc8c50e094591063e /networking/tftp.c
parent330d898e99f048bfe256c0123b29bdd77ea7b9b4 (diff)
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tftp: add comment, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/tftp.c')
-rw-r--r--networking/tftp.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/networking/tftp.c b/networking/tftp.c
index 5c50b8cec..094c3baab 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -1,7 +1,5 @@
1/* vi: set sw=4 ts=4: */ 1/* vi: set sw=4 ts=4: */
2/* ------------------------------------------------------------------------- 2/*
3 * tftp.c
4 *
5 * A simple tftp client/server for busybox. 3 * A simple tftp client/server for busybox.
6 * Tries to follow RFC1350. 4 * Tries to follow RFC1350.
7 * Only "octet" mode supported. 5 * Only "octet" mode supported.
@@ -19,8 +17,7 @@
19 * tftpd added by Denys Vlasenko & Vladimir Dronnikov 17 * tftpd added by Denys Vlasenko & Vladimir Dronnikov
20 * 18 *
21 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 19 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
22 * ------------------------------------------------------------------------- */ 20 */
23
24#include "libbb.h" 21#include "libbb.h"
25 22
26#if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT 23#if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT
@@ -232,6 +229,34 @@ static int tftp_protocol(
232#endif 229#endif
233 } 230 }
234 231
232 /* Examples of network traffic.
233 * Note two cases when ACKs with block# of 0 are sent.
234 *
235 * Download without options:
236 * tftp -> "\0\1FILENAME\0octet\0"
237 * "\0\3\0\1FILEDATA..." <- tftpd
238 * tftp -> "\0\4\0\1"
239 * ...
240 * Download with option of blksize 16384:
241 * tftp -> "\0\1FILENAME\0octet\0blksize\00016384\0"
242 * "\0\6blksize\00016384\0" <- tftpd
243 * tftp -> "\0\4\0\0"
244 * "\0\3\0\1FILEDATA..." <- tftpd
245 * tftp -> "\0\4\0\1"
246 * ...
247 * Upload without options:
248 * tftp -> "\0\2FILENAME\0octet\0"
249 * "\0\4\0\0" <- tftpd
250 * tftp -> "\0\3\0\1FILEDATA..."
251 * "\0\4\0\1" <- tftpd
252 * ...
253 * Upload with option of blksize 16384:
254 * tftp -> "\0\2FILENAME\0octet\0blksize\00016384\0"
255 * "\0\6blksize\00016384\0" <- tftpd
256 * tftp -> "\0\3\0\1FILEDATA..."
257 * "\0\4\0\1" <- tftpd
258 * ...
259 */
235 block_nr = 1; 260 block_nr = 1;
236 cp = xbuf + 2; 261 cp = xbuf + 2;
237 262