NAME¶

nemesis-ospf — OSPF Protocol (The Nemesis Project)

SYNOPSIS¶

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-ospf provides an interface to craft and inject OSPF packets, allowing the the user to specify any portion of an OSPF packet, as well as lower-lever IP packet information.

OSPF Options¶

-m METRIC

OSPF Metric

-s NUM

OSPF Sequence Number

-r ADDR

OSPF Advertising Router Address

-n MASK

OSPF Netmask

-o OPT

OSPF Options, 1 byte value

-R ADDR

OSPF Source Router ID

-A ADDR

OSPF Area ID, e.g. 0.0.0.1, default 0.0.0.0

-P FILE

Filename to read for raw (HEX) OSPF packet payload, appended after selected packet type. I.e., can be used with -pU to create multi LSA Link State Updates.

-v

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

IP OPTIONS¶

-S ADDR

Specify the source address within the IP header.

-D ADDR

Specify the destination address within the IP header. Defaults to the link-local multicast address 224.0.0.5 (All OSPF Routers).

-F OPT

Specify the IP header fragmentation options:

-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-ospf 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.

-S ADDR

Specify the source IP address within the IP header.

-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.

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-ospf 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), nemesis-icmp(1), nemesis-igmp(1), nemesis-ip(1), nemesis-rip(1), nemesis-tcp(1), nemesis-udp(1).

AUTHORS¶

Mark Grimes <mark@stateful.net>,
Jeff Nathan <jeff@snort.org> and
Joachim Nilsson <troglobit@gmail.com>

BUGS¶

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