🦀 pcep-parser 🦀

Rust Crate aiming for the parsing of pcep messages

How to compile

Prerequites:

• rustc : 1.66+
• cargo : 1.66+

git clone https://github.com/saurabh10041998/pcep-parser.git
cd pcep-parser
cargo build --release
cd target/release

You will find the release binary. Alternatively you can download the zip compactible to your operating system from release section.

How to use it

Following python3 script will show how you can decode packet..

driver.py

#! /usr/bin/env python3
import argparse
import os
from scapy.all import *

parser = argparse.ArgumentParser()
parser.add_argument("--file",required = True, help = "name of pcap file containing pcep packets..")

args = parser.parse_args()
opts = vars(args)

packets = rdpcap(opts["file"])

## loop to each packet of pcaps
for packet in packets:
    try:
        ## If packet has TCP layer
        if packet.haslayer(TCP):
            ## Get the TCP payload or PCEP packet
            payload = packet[TCP].payload
            ## If no packet, continue looping
            if len(payload.__bytes__()) == 0:
                continue
            ## Dump PCEP packet to file
            with open("tmp_packet", "wb") as f:
                f.write(payload.__bytes__())
            ## Call the binary to parse the dumped pcep packet
            os.system("pcep-parser/target/release/pcep-parser")
    finally:
        ## Delete the file when parsing is done..
        os.remove("tmp_packet")

To run it:

./driver.py --file pcep_packets.pcap

Note : The command line argument support soon be added to eliminated the need of such external scripts.

message type supported

• OPEN message
• Keepalive message
• PCUpdate message. (Please see the following table matrix for what subobjects and Tlvs are supported).
• PCInitiate message. (Please see the following table matrix for what subobjects and Tlvs are supported).
• PCRpt message.

More message, objects, subobjects and tlvs soon to be added in next release.

PCEP Messages

RFCs	Message Type Supported
RFC5440	Open, KeepAlive
RFC8231	PCUpdate
RFC8281	PCInitiate

PCEP Objects

Object	RFCs	Supported TLVs
OPEN	RFC5440	STATEFUL-PCE-CAPABILITY TLV, SR-PCE-CAPABILITY TLV
ENDPOINTS	RFC5440	IPv4Addresses supported
ERO	RFC5440	SR subobject RFC8664, Ipv4Prefix Subobject RFC3209
SRP	RFC8231	No TLV supported yet
LSP	RFC8231,RFC8281	IPV4LSPIDENTIFIERS-TLV, SYMBOLICPATHNAME-TLV
LSPA	RFC5440	No TLVs
METRIC	RFC8231	Igp, Te, Hopcount, Sid-Depth, PathDelay metric supported
BANDWIDTH	RFC5440	Requested Bandwidth Type and Bandwidth of an existing TE LSP for which a reoptimization is requested

PCEP subobjects

Subobject	RFCs	Supported TLVs
SR-ERO	RFC8664	NAIType: Ipv4 Adjacency NAIType supported
IPv4Pefix	RFC3209