nemesis-igmp - IGMP Protocol (The Nemesis Project)

nemesis-igmp [-vZ?] [-c IGMP-code ] [-d Ethernet-device ] [-D destination-IP-address ] [-F fragmentation-options ] [-H source-MAC-address ] [-i IGMP-group-IP-address ] [-I IP-ID ] [-M destination-MAC-address ] [-O IP-options-file ] [-p IGMP-type ] [-P payload-file ] [-S source-IP-address ] [-t IP-tos ] [-T IP-TTL ]

The Nemesis Project 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-igmp provides an interface to craft and inject IGMP packets allowing the user to specify any portion of an IGMP packet as well as lower-level IP packet information.

-c IGMP-code (unused field)

Specify the IGMP-code or the value for the one-byte field following the IGMP type field. This value is normally unused.

-i IGMP-group-IP-address

Specify the the IGMP-group-IP-address within the IGMP header.

-p IGMP-type

Specify the IGMP-type within the IGMP header. Valid IGMP-type values:

17 (IGMP membership query)
18 (IGMP V1 membership report)
22 (IGMP V2 membership report)
23 (IGMP leave group)

Only one type may be specified at a time.

-P payload-file

This will case nemesis-igmp to use the specified payload-file as the payload when injecting IGMP packets. For packets injected using the raw interface (where -d is not used), the maximum payload size is 65467 bytes. For packets injected using the link layer interface (where -d IS used), the maximum payload size is 1432 bytes. Payloads can also be read from stdin by specifying '-P -' instead of a payload file.

Windows systems are limited to a maximum payload size of 1432 bytes for IGMP packets.

-v verbose-mode

Display the injected packet in human readable form. Use twice to see a hexdump of the injected packet.

-D destination-IP-address

Specify the destination-IP-address within the IP header.

-F fragmentation-options (-F[D],[M],[R],[offset])

Specify the fragmentation options:

-FD (don't fragment)
-FM (more fragments)
-FR (reserved flag)
-F <offset>

within the IP header. 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 IP-ID

Specify the IP-ID within the IP header.

-O IP-options-file

This will cause nemesis-igmp 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 options can also be read from stdin by specifying '-O -' instead of an IP-options-file.

-S source-IP-address

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

-t IP-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 IP-TTL

IP-time-to-live (TTL) within the IP header.

-d Ethernet-device

Specify the name (for UNIX-like systems) or the number (for Windows systems) of the Ethernet-device to use (eg. fxp0, eth0, hme0, 1).

-H source-MAC-address

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

-M destination-MAC-address

Specify the destintion-MAC-address (XX:XX:XX:XX:XX:XX).

-Z list-network-interfaces

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

NOTE: This feature is only relevant to Windows systems.

Nemesis-igmp returns 0 on a successful exit, 1 if it exits on an error.

Send concise and clearly written bug reports to jeff@snort.org

Jeff Nathan <jeff@snort.org>

Originally developed by Mark Grimes <mark@stateful.net>

nemesis-arp(1), nemesis-dns(1), nemesis-ethernet(1), nemesis-icmp(1), nemesis-ip(1), nemesis-ospf(1), nemesis-rip(1), nemesis-tcp(1), nemesis-udp(1)