diff options
| -rw-r--r-- | networking/tftp.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/networking/tftp.c b/networking/tftp.c index 5c50b8c..094c3ba 100644 --- a/networking/tftp.c +++ b/networking/tftp.c @@ -1,7 +1,5 @@ /* vi: set sw=4 ts=4: */ -/* ------------------------------------------------------------------------- - * tftp.c - * +/* * A simple tftp client/server for busybox. * Tries to follow RFC1350. * Only "octet" mode supported. @@ -19,8 +17,7 @@ * tftpd added by Denys Vlasenko & Vladimir Dronnikov * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. - * ------------------------------------------------------------------------- */ - + */ #include "libbb.h" #if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT @@ -232,6 +229,34 @@ static int tftp_protocol( #endif } + /* Examples of network traffic. + * Note two cases when ACKs with block# of 0 are sent. + * + * Download without options: + * tftp -> "\0\1FILENAME\0octet\0" + * "\0\3\0\1FILEDATA..." <- tftpd + * tftp -> "\0\4\0\1" + * ... + * Download with option of blksize 16384: + * tftp -> "\0\1FILENAME\0octet\0blksize\00016384\0" + * "\0\6blksize\00016384\0" <- tftpd + * tftp -> "\0\4\0\0" + * "\0\3\0\1FILEDATA..." <- tftpd + * tftp -> "\0\4\0\1" + * ... + * Upload without options: + * tftp -> "\0\2FILENAME\0octet\0" + * "\0\4\0\0" <- tftpd + * tftp -> "\0\3\0\1FILEDATA..." + * "\0\4\0\1" <- tftpd + * ... + * Upload with option of blksize 16384: + * tftp -> "\0\2FILENAME\0octet\0blksize\00016384\0" + * "\0\6blksize\00016384\0" <- tftpd + * tftp -> "\0\3\0\1FILEDATA..." + * "\0\4\0\1" <- tftpd + * ... + */ block_nr = 1; cp = xbuf + 2; |