maskreply(ADMN)
maskreply --
send gratuitous ICMP mask reply
Syntax
maskreply
Description
maskreply checks the kernel variable
icmp_answermask; if it is set, then for each
interface maskreply sends an unsolicited
ICMP netmask reply to the address returned by
SIOCGIFBRDADDR using the netmask returned by
SIOCGIFNETMASK. maskreply will send a
mask reply out an interface only if all of the following
are true: the interface is in address family
AF_INET, the interface is up, the interface
supports broadcasts, and the interface is not
point-to-point.
A host that acts as an authority for netmasks is required
by RFC 1122 to broadcast an ICMP
subnetmask reply when the host comes up. By executing
maskreply in /etc/tcp this requirement
is satisfied.
See also
icmp(ADMP),
ifconfig(ADMN),
ip(ADMP),
tcp(ADMN)
Standards conformance
maskreply is conformant with:
RFC 792 (STD 5),
RFC 1122 (STD 5)
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003