Btw you might find https://protogen.marcgravell.com/decode useful - it
explains how each byte is interpreted. It doesn't give the details (so: it
doesn't explain how varint works), but it at least makes it explicit which
bytes have contributed to which outcomes.
On Tue, 17 Jul 2018, 08:22 Marc Gravell, wrote:
> AA 06 is indeed 101, that's "varint" encoding. The MSB of each byte is
> continuation, 7 bits payload, and adjust for endianness. The idea of
> decode-raw is that it is enough to start guessing at how to reverse
> engineer a message, for example you can see values that are clearly string
> IP-addresses. However, the other fields are much harder to interpret
> without context. If you do have the original .proto schema, it would help
> tremendously.
>
> On Tue, 17 Jul 2018, 05:17 , wrote:
>
>> How to decode protobuff embedded message. Please give any pseudo code. I
>> see aa 06 gets decoded as 101. Please let me know how?
>>
>> Protobuff data:
>>
>> echo -n "0a 0b 31 39 32 2e 31 30 2e 31 31 2e 31 10 01 aa 06 88 01 e2 a4
>> 01 83 01 1a 80 01 0a 1e 0a 06 70 6f 72 74 5f 32 10 80 b7 e3 88 08 18 02 32
>> 0c 08 00 10 00 28 00 30 00 38 00 40 00 0a 1e 0a 06 70 6f 72 74 5f 33 10 80
>> b7 e3 88 08 18 03 32 0c 08 00 10 00 28 00 30 00 38 00 40 00 0a 1e 0a 06 70
>> 6f 72 74 5f 34 10 80 b7 e3 88 08 18 04 32 0c 08 00 10 00 28 00 30 00 38 00
>> 40 00 0a 1e 0a 06 70 6f 72 74 5f 35 10 80 b7 e3 88 08 18 05 32 0c 08 00 10
>> 00 28 00 30 00 38 00 40 00" | xxd -r -p | protoc --decode_raw
>> 1: "192.10.11.1"
>> 2: 1
>> 101 {
>> 2636 {
>> 3 {
>> 1 {
>> 1: "port_2"
>> 2: 2165889920
>> 3: 2
>> 6 {
>> 1: 0
>> 2: 0
>> 5: 0
>> 6: 0
>> 7: 0
>> 8: 0
>> }
>> }
>> 1 {
>> 1: "port_3"
>> 2: 2165889920
>> 3: 3
>> 6 {
>> 1: 0
>> 2: 0
>> 5: 0
>> 6: 0
>> 7: 0
>> 8: 0
>> }
>> }
>> 1 {
>> 1: "port_4"
>> 2: 2165889920
>> 3: 4
>> 6 {
>> 1: 0
>> 2: 0
>> 5: 0
>> 6: 0
>> 7: 0
>> 8: 0
>> }
>> }
>> 1 {
>> 1: "port_5"
>> 2: 2165889920
>> 3: 5
>> 6 {
>> 1: 0
>> 2: 0
>> 5: 0
>> 6: 0
>> 7: 0
>> 8: 0
>> }
>> }
>> }
>> }
>> }
>>
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