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Limited parsing of IEC61850 MMS mappings for scapy.

Python 100.00%

python python3 scapy mms iec61850 61850 dissector asn1

iec61850_mms_scapy's Introduction

iec61850_mms_scapy

Scapy definitions (partially ASN.1) for a small subset of IEC 61850-8-1 MMS messages. Basic functionality of intermediary layers (tpkt, cotp, iso8327-1, iso8823, and iso8650-1) has been implemented.

To bind layers, run:

import iec61850_mms
iec61850_mms.bind_layers()

Supported packet types

MMS:
    -   ConfirmedRequest (read, write, getnamelist)
    -   InitiateRequest
    -   InitiateResponse

ACSE/ISO 8650-1:
    - AARQ
    - AARE

ISO 8823:
    - CP
    - CPA
    - CPC

ISO 8327-1:
    - User Data (DT)
    - Connect (CN)
    - Accept (AC)

COTP:
    - Data (DT)
    - Connection Requests (CR)
    - Connection Responses (CC)

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iec61850_mms_scapy's Issues

string index out of range

Dear Réné

I tried to execute but I get an Exception "string index out of range" , pointing at "class MMS_Name(ASN1_Packet)" in mms/packets.py file.
Do you know where is the problem?
Another question, how can code or decode?

Thanks

How to access layers(cotp, tpkt and mms) on scapy

When ı try to get layers of mms packet ı get list of layers like this:

['Ethernet', 'IP', 'TCP', 'TPKT', 'COTP', 'COTP Connection Request (CR)']

but I tried to access layers like packet.getlayer(tpkt) and i got an error

name 'tpkt' is not defined
How can i access the tpkt, cotp and mms layers?

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