a hex string to binary converter in perl and python.
a2b [-hd|-tcpdump|-gdb|-h]
for example,
% echo "74 65 73 74 0A" | ./a2b
test
any combination of 1-byte hex string. the following delimiters are acceptable.
. (priod)
, (comma)
- (hyphen)
: (colon)
e.g. the followings are going to be all same output.
74 65 73 74 0A
746573740A
7465 7374 0A
74.65.73.74.0A
74:65:73:74:0A
74-65-73-74-0A
0x7465,0x7374,0x0A
0x74-0x65-0x73-0x74-0x0A
the -hd option specify the input is the output of hexdump(1) like below:
% hexdump -C test.txt
00000000 30 30 30 31 30 32 30 33 30 34 30 35 30 36 30 37 |0001020304050607|
00000010 30 38 30 39 30 61 30 62 30 63 30 64 30 65 30 66 |08090a0b0c0d0e0f|
00000020 31 30 31 31 31 32 31 33 31 34 31 35 31 36 31 37 |1011121314151617|
00000030 31 38 31 39 31 61 31 62 31 63 31 64 31 65 31 66 |18191a1b1c1d1e1f|
00000040 32 30 32 31 32 32 32 33 32 34 32 35 32 36 32 37 |2021222324252627|
the -hd option specify the input is the output of tcpdump(1) like below:
% tcpdump -nqxi lo0
07:12:38.197522 IP 127.0.0.1.56622 > 127.0.0.1.2056: UDP, length 8
0x0000: 4500 0024 87d3 0000 4011 0000 7f00 0001
0x0010: 7f00 0001 dd2e 0808 0010 fe23 0800 0102
0x0020: b201 0000
the following format is treated in the default parser.
% tcpdump -sx 1500 -nqti lnc0
92.168.246.128.4158 > 203.178.141.195.110: tcp 0 (DF)
4500 003c 7474 4000 4006 b5a8 c0a8 f680
cbb2 8dc3 103e 006e e8c8 6f7c 0000 0000
a002 e000 5204 0000 0204 05b4 0103 0300
0101 080a 05ee 9984 0000 0000
the -gdb option specify the input is the output of the command x of gdb(1) like below:
(gdb) x/128b &ac
0xbfbff328: 0x01 0x00 0x00 0x00 0x70 0xf3 0xbf 0xbf
0xbfbff330: 0x78 0xf3 0xbf 0xbf 0x68 0xf3 0xbf 0xbf
0xbfbff338: 0x82 0xa7 0x04 0x08 0xd3 0xb3 0x04 0x08
0xbfbff340: 0x2c 0x3f 0x08 0x08 0x00 0x00 0x00 0x00
0xbfbff348: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0xbfbff350: 0x64 0xf3 0xbf 0xbf 0x00 0x00 0x00 0x00
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