NAME¶
sc_ally —
scamper driver to run Ally on
a list of candidate aliases.
SYNOPSIS¶
| sc_ally |
[-?D]
[-i infile]
[-o outfile]
[-p port]
[-U unix-socket]
[-w waittime]
[-q attempts]
[-t logfile] |
DESCRIPTION¶
The
sc_ally utility provides the ability to connect to a
running
scamper(1) instance and have a set of IPv4
address-pairs testsed for aliases using the Ally technique. For each address
pair in the file,
sc_ally establishes which probe methods
(UDP, TCP-ack, ICMP-echo) solicit an incrementing IP-ID value, and then uses
the Ally technique on pairs where a probe method is able to obtain an
incrementing IP-ID for both addresses. The output is written to a warts file.
The options are as follows:
- -?
- prints a list of command line options and a synopsis of
each.
- -D
- causes sc_ally to detach and become a
daemon.
- -i
infile
- specifies the name of the input file which consists of a
sequence of IPv4 address-pairs, one pair per line.
- -o
outfile
- specifies the name of the output file to be written. The
output file will use the warts format.
- -p
port
- specifies the port on the local host where
scamper(1) is accepting control socket connections.
- -U
unix-socket
- specifies the name of a unix domain socket where
scamper(1) is accepting control socket connections.
- -w
waittime
- specifies the minimum length of time, in seconds, to wait
between completing a measurement to a particular IP address and issuing
the next.
- -q
attempts
- specifies the number of times to try Ally when one of the
addresses is unresponsive.
- -t
logfile
- specifies the name of a file to log output from
sc_ally generated at run time.
EXAMPLE¶
Given a set of IPv4-address pairs in a file named infile.txt:
192.0.2.1 192.0.32.10 192.0.2.2 192.0.31.8 192.0.2.3 192.0.30.64
and a
scamper(1) daemon listening on port 31337, then these
address-pairs can be tested for aliases using
sc_ally -i infile.txt -o outfile.warts -p 31337
SEE ALSO¶
N. Spring, R.
Mahajan, and D. Wetherall,
Measuring ISP topologies with Rocketfuel,
Proc. ACM SIGCOMM 2002.
scamper(1),
sc_wartsdump(1),
sc_warts2text(1)
AUTHORS¶
sc_ally is written by Matthew Luckie
<mjl@luckie.org.nz>.
