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NAME
     nemesis-udp -- UDP Protocol (The Nemesis Project)

SYNOPSIS
     nemesis-udp [-v6Z?] [-d IFNAME] [-c COUNT] [-D ADDR] [-F OPT] [-H MAC]
		 [-I ID] [-i INTERVAL] [-M MAC] [-O FILE] [-P FILE] [-S ADDR]
		 [-t TOS] [-T TTL] [-x PORT] [-y PORT]

DESCRIPTION
     nemesis is designed to be a command line-based, portable human IP stack for
     UNIX-like	and  Windows systems.  The suite is broken down by protocol, and
     should allow for useful scripting of injected  packets  from  simple  shell
     scripts.

     nemesis-udp  provides an interface to craft and inject UDP packets allowing
     the user to specify any portion of a UDP packet as well as  lower-level  IP
     packet information.

GENERAL OPTIONS
     -6      Use  IPv6.   When	enabled, the -S ADDR and -D ADDR options are ex-
	     pected to be IPv6 addresses.

     -c COUNT
	     Number of packets to send, default: 1.

     -i INTERVAL
	     Seconds between repeatedly sent packets, only available  if  -c  is
	     given.

     -v      Display  the  injected packet in human readable form.  Use twice to
	     see a hexdump of the injected packet with printable  ASCII  charac-
	     ters  on  the right.  Use three times for a hexdump without decoded
	     ASCII.

UDP Options
     -P FILE
	     This will cause nemesis-udp to use the specified  payload	file  as
	     the payload when injecting UDP packets.  For packets injected using
	     the  raw interface (where -d is not used), the maximum payload size
	     is 65415 bytes.  For packets injected using the link  layer  inter-
	     face  (where  -d  IS used), the maximum payload size is 1380 bytes.
	     Payloads can also be read from stdin by specifying `-P-' instead.

	     Windows systems are limited to a maximum payload size of 1380 bytes
	     for UDP packets.

     -x PORT
	     Specify the source port within the UDP header.

     -y PORT
	     Specify the destintion port within the UDP header.

IP OPTIONS
     -D ADDR
	     Specify the destination IP address within the IP header.

     -S ADDR
	     Specify the source IP address within the IP header.

   IPv4 OPTIONS
     -F OPT  Specify the fragmentation options in the IP header:

		   -FD	      don't fragment
		   -FM	      more fragments
		   -FR	      reserved flag
		   -F offset

	     IP fragmentation options can be specified individually or	combined
	     into  a single argument to the -F command line switch by separating
	     the options with commas (eg.  -FD,M) or spaces (eg.  -FM 223).  The
	     IP fragmentation offset is a 13-bit field with valid values from  0
	     to 8189.  Don't fragment (DF), more fragments (MF) and the reserved
	     flag (RESERVED or RB) are 1-bit fields.

	     NOTE: Under normal conditions, the reserved flag is unset.

     -I ID   Specify the IP ID within the IP header.

     -O FILE
	     This will cause nemesis-udp to use the specified IP options file as
	     the  options  when  building the IP header for the injected packet.
	     IP options can be up to 40 bytes in length.  The  IP  options  file
	     must  be  created	manually based upon the desired options.  IP op-
	     tions can also be read from stdin by specifying -O- instead.

     -t TOS  Specify the IP type of service (TOS) within the IP  header.   Valid
	     type of service values:

		   2   Minimize monetary cost
		   4   Maximize reliability
		   8   Maximize throughput
		   24  Minimize delay

	     NOTE:  Under  normal  conditions,	only  one type of service is set
	     within a packet.  To specify multiple types, specify the sum of the
	     desired values as the type of service.

     -T TTL  Specify the IP time-to-live (TTL) in the IP header.

   IPv6 OPTIONS
     -H LIMIT
	     Set hop limit, similar to IPv4 TTL, max 255.

DATA LINK OPTIONS
     -d IFNAME
	     Specify the name (for UNIX-like systems) or the number (for Windows
	     systems) of the IFNAME to use (eg. fxp0, eth0, hme0, 1).

     -H MAC  Specify the source MAC address, (XX:XX:XX:XX:XX:XX).

     -M MAC  Specify the destination MAC address, (XX:XX:XX:XX:XX:XX).

     -Z      Lists the available network interfaces by number for use  in  link-
	     layer injection.

	     NOTE: This feature is only relevant to Windows systems.

DIAGNOSTICS
     nemesis-udp returns 0 on a successful exit, 1 if it exits on an error.

SEE ALSO
     nemesis-arp(1), nemesis-dhcp(1), nemesis-dns(1), nemesis-ethernet(1), neme-
     sis-icmp(1),   nemesis-igmp(1),  nemesis-ip(1),  nemesis-ospf(1),	nemesis-
     rip(1), nemesis-tcp(1).

AUTHORS
     Mark Grimes <mark@stateful.net> and
     Jeff Nathan <jeff@snort.org>

BUGS
     Please report at https://github.com/libnet/nemesis/issues

				  Jul 20, 2021			  nemesis-udp(1)

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