pcapObj = pcapWriter('FileName','sample');
linkType = 113;                                         % Link type of SLL packet
timestamp = 300;                                        % Timestamp

writeGlobalHeader(pcapObj,linkType);

payload = [59; 205];                                    % MAC subPDU (contains truncated buffer status report (BSR) control element)
radioType = 1;                                          % Frequency division duplexing
linkDir = 0;                                            % Uplink packet
rntiType = 3;                                           % Cell-RNTI
startString = [109; 97; 99; 45; 110; 114];              % Tag to indicate the start of NR MAC signature
payloadTag = 1;                                         % Payload tag for NR packets
signature = [startString; radioType; linkDir; rntiType];
macNRInfoPacket = [signature; payloadTag; payload];

udpPacketLength = 8 + length(macNRInfoPacket);          % Length of header (8 bytes) and payload
udpHeader = [163; 76;                                   % Source port number
    39; 15;                                             % Destination port number
    fix(udpPacketLength/256); mod(udpPacketLength,256); % Total length of UDP packet
    0; 0];                                              % Checksum

ipPacketLength = 20 + udpPacketLength;                  % Length of header (20 bytes) and payload
ipHeader = [69;                                         % Version of IP protocol and priority or traffic Class
    0;                                                  % Type of service
    fix(ipPacketLength/256); mod(ipPacketLength,256);   % Total length of the IPv4 packet
    0; 1;                                               % Identification
    0; 0;                                               % Flags and fragmentation offset
    64;                                                 % Time to live in seconds
    17;                                                 % UDP protocol number
    0; 0;                                               % Header checksum
    127; 0; 0; 1;                                       % Source IP address
    127; 0; 0; 1];                                      % Destination IP address

sllHeader = [0; 0;                                      % Packet type
    3; 4;                                               % Address resolution protocol hardware (ARPHRD) type
    0; 0;                                               % Link layer address length
    0; 0; 0; 0; 0; 0; 0; 0;                             % Link layer address
    8; 0];                                              % Protocol type

packet = [sllHeader; ipHeader; udpHeader; macNRInfoPacket];

write(pcapObj,packet,timestamp);