reset

Reset position of PCAP file reader to first protocol packet of PCAP file

Since R2021b

Syntax

reset(pcap)

Description

reset(pcap) resets the position of the specified PCAP file reader to the first protocol packet in the PCAP file.

Examples

Reset PCAP File Reader

Create a PCAP file reader object, specifying the name of a PCAP file.

pcapReaderObj = pcapReader('ethernetSamplePackets.pcap');

Create a filter for the eCPRI packets, specifying the message type as a bit sequence.

filterString = 'ecpri.MessageType == BitSequence';

Read the first eCPRI packet that matches the specified filter to the MATLAB® workspace.

ecpriFilteredFirstPacket = read(pcapReaderObj,filterString)

ecpriFilteredFirstPacket = struct with fields:
             SNo: 22
       Timestamp: 1.6128e+15
        LinkType: 1
        Protocol: 'eth'
    PacketLength: 64
          Packet: [1x1 struct]
        RawBytes: [1x0 double]

Reset the position of the PCAP file reader to the first packet of the PCAP file.

reset(pcapReaderObj);

Create a new filter for the eCPRI packets, specifying the message type as a bit sequence.

filterString = 'ecpri.MessageType == IQData';

Read the eCPRI packets that match the specified filter to the MATLAB workspace.

ecpriFilteredPackets = readAll(pcapReaderObj,filterString)

ecpriFilteredPackets = struct with fields:
             SNo: 21
       Timestamp: 1.6128e+15
        LinkType: 1
        Protocol: 'eth'
    PacketLength: 64
          Packet: [1x1 struct]
        RawBytes: [1x0 double]

Input Arguments

pcap — PCAP file reader

pcapReader object

PCAP file reader, specified as a pcapReader object.

References

[1] “Common Public Radio Interface: eCPRI Interface Specification V1.2 ” Accessed June 22, 2021.

Version History

Introduced in R2021b