.Dd $Mdocdate: September 29 2015 $
.Dt ECHOC 1
.Os
.Sh NAME
.Nm echoc
.Nd send UDP packets to network hosts and wait for replies
.Sh SYNOPSYS
.Nm echoc
.Bk -words
.Op Fl dv
.Op Fl c Ar count
.Op Fl i Ar ms
.Op Fl l Ar len
.Op Fl p Ar port
.Op Fl t Ar ms
.Ar host
.Ek
.Sh DESCRIPTION
.Nm
sends UDP packets to the 
.Dv ECHO
service on the remote 
.Ar host .
The options ar as follow:
.Bl -tag -width Ds
.It Fl c Ar count
Stop sending after
.Ar count
packets have been sent.
.It Fl d
Set the 
.Dv Don't Fragment
bit.
.It Fl i Ar ms
wait
.Ar i
milliseconds between every packet (default: 100 ms).
.It Fl l Ar len
Send packets of length
.Ar len
bytes (default: 10).
.It Fl p Ar port
Set destination port to 
.Ar port
(default: 7 - echo).
.It Fl t Ar ms
Wait at most
.Ar t
milliseconds for the reply before declaring the connection dead.
.El
.Sh SEE ALSO
.Xr nc 1 ,
.Xr ping 8 ,
.Xr ping6 8
.Sh AUTHOR
The
.Nm
utility was written for tetaneutral.net by Matthieu Herrb.