# randpkt

## NAME



           randpkt - Random packet generator
    


## SYNOPSIS



           **randpkt**[ **-b** <maxbytes> ] [ **-c** <count> ] [ **-F** <file format> ] [ **-r**
           ] [ **-t** <type> ] <filename>
    
           **randpkt -h|--help**
    
           **randpkt -v|--version**
    


## DESCRIPTION



           **randpkt** is a small utility that creates a trace file full of
           random packets.
    
           By creating many randomized packets of a certain type, you can
           test packet sniffers to see how well they handle malformed
           packets. The sniffer can never trust the data that it sees in the
           packet because you can always sniff a very bad packet that
           conforms to no standard. **randpkt** produces _very bad_ packets.
    
           When creating packets of a certain type, **randpkt** uses a sample
           packet that is stored internally to **randpkt**. It uses this as the
           starting point for your random packets, and then adds extra random
           bytes to the end of this sample packet.
    
           For example, if you choose to create random ARP packets, **randpkt**
           will create a packet which contains a predetermined Ethernet II
           header, with the Type field set to ARP. After the Ethernet II
           header, it will put a random number of bytes with random values.
    


## OPTIONS



           -b <maxbytes>
    
               Default 5000.
    
               Defines the maximum number of bytes added to the sample
               packet. If you choose a **maxbytes** value that is less than the
               size of the sample packet, then your packets would contain
               only the sample packet... not much variance there! **randpkt**
               exits on that condition.
    
           -c <count>
    
               Default 1000.
    
               Defines the number of packets to generate.
    
           -F <file format>
    
               Default **pcapng**.
    
               Sets the file format of the output capture file. **randpkt** can
               write the file in several formats; **randpkt -F** provides a list
               of the available output formats. Note that not all output
               formats support all packet types.
    
           -h|--help
               Print the version number and options and exit.
    
           -r
    
               The packet type is determined randomly for each packet. This
               requires an output format that can support different
               encapsulations per packet, like **pcapng**.
    
           -t <type>
    
               Default Ethernet II frame.
    
               Defines the type of packet to generate:
    
                   arp             Address Resolution Protocol
                   bgp             Border Gateway Protocol
                   bvlc            BACnet Virtual Link Control
                   dns             Domain Name Service
                   eth             Ethernet
                   fddi            Fiber Distributed Data Interface
                   giop            General Inter-ORB Protocol
                   icmp            Internet Control Message Protocol
                   ip              Internet Protocol
                   ipv6            Internet Protocol Version 6
                   llc             Logical Link Control
                   m2m             WiMAX M2M Encapsulation Protocol
                   megaco          MEGACO
                   nbns            NetBIOS-over-TCP Name Service
                   ncp2222         NetWare Core Protocol
                   sctp            Stream Control Transmission Protocol
                   syslog          Syslog message
                   tds             TDS NetLib
                   tcp             Transmission Control Protocol
                   tr              Token-Ring
                   udp             User Datagram Protocol
                   usb             Universal Serial Bus
                   usb-linux       Universal Serial Bus with Linux specific header
    
           -v|--version
               Print the full version information and exit.
    


## DIAGNOSTIC OPTIONS



           --log-level <level>
               Set the active log level. Supported levels in lowest to
               highest order are "noisy", "debug", "info", "message",
               "warning", "critical", and "error". Messages at each level and
               higher will be printed, for example "warning" prints
               "warning", "critical", and "error" messages and "noisy" prints
               all messages. Levels are case insensitive.
    
           --log-fatal <level>
               Abort the program if any messages are logged at the specified
               level or higher. For example, "warning" aborts on any
               "warning", "critical", or "error" messages.
    
           --log-domains <list>
               Only print messages for the specified log domains, e.g.
               "GUI,Epan,sshdump". List of domains must be comma-separated.
               Can be negated with "!" as the first character (inverts the
               match).
    
           --log-debug <list>
               Force the specified domains to log at the "debug" level. List
               of domains must be comma-separated. Can be negated with "!" as
               the first character (inverts the match).
    
           --log-noisy <list>
               Force the specified domains to log at the "noisy" level. List
               of domains must be comma-separated. Can be negated with "!" as
               the first character (inverts the match).
    
           --log-fatal-domains <list>
               Abort the program if any messages are logged for the specified
               log domains. List of domains must be comma-separated.
    
           --log-file <path>
               Write log messages and stderr output to the specified file.
    


## EXAMPLES



           To see a description of the randpkt options use:
    
               randpkt
    
           To generate a capture file with 1000 DNS packets use:
    
               randpkt -b 500 -t dns rand_dns.pcapng
    
           To generate a small capture file with just a single LLC frame use:
    
               randpkt -b 100 -c 1 -t llc single_llc.pcapng
    


* * *