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DevelopersUSB Sniffing in Linux
» tidy.c
output formatter -
Daniel Clemmensen
, 02/24/2019 10:02 AM
/*tidy.c -- clean up the .tsv output from tshark for a serial-over-USB
session. input from stdin, output to stdout.
Copyright (c) 2019 Dan Clemmensen, licensed to you under GPL v3.
input lines:
source\tinfo\tdata\n
for each line:
get dirchar (first char of source is 'h' or not),
get bulk char (fourth char of info is 'B' or not),
get start of data
If dir changed,
print existing buffer and start a new one
remove the colons from the data and append to buffer
at end, print buffer
output line starts with '<' or '>' for direction, followed by the hex chars
sent or received.
*/
#include
<strings.h>
#include
<string.h>
#include
<stdio.h>
#include
<stdlib.h>
static
char
separator
=
'\t'
;
int
main
()
{
char
buff
[
1000
];
char
*
inpt
=
buff
;
size_t
buflen
=
1000
;
int
len
;
char
outbuff
[
1000
];
int
dir
=
2
;
//2= unknown, 1=from host, 0= to host
int
newdir
=
0
;
int
ndx
=
0
;
char
*
pt
;
char
chr
;
while
(
-
1
!=
(
len
=
getline
(
&
inpt
,
&
buflen
,
stdin
)))
{
if
(
buff
[
len
-
1
]
==
'\n'
)
buff
[
len
-
1
]
=
'\0'
;
pt
=
strchr
(
buff
,
separator
);
if
((
pt
[
5
]
==
'B'
)
&&
(
0
!=*
(
pt
=
1
+
strchr
(
pt
+
1
,
separator
))))
{
newdir
=
buff
[
0
]
==
'h'
;
if
(
newdir
!=
dir
)
{
if
(
ndx
)
{
outbuff
[
ndx
]
=
0
;
printf
(
"%c%s
\n
"
,
dir
?
'>'
:
'<'
,
outbuff
);
}
dir
=
newdir
;
ndx
=
0
;
}
while
(
0
!=
(
chr
=*
pt
++
))
if
(
chr
!=
':'
)
outbuff
[
ndx
++
]
=
chr
;
}
}
outbuff
[
ndx
]
=
0
;
if
(
ndx
)
printf
(
"%c%s
\n
"
,
dir
?
'>'
:
'<'
,
outbuff
);
//last line
return
0
;
}
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