bac9f03ed
Denys Vlasenko
2009-07-25
Subject
tftp: add comment, no code changes
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networking/tftp.c+30 -5
| @@ -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; | |