Rechercher une page de manuel

Chercher une autre page de manuel:

mld.4freebsd

Langue: en

Version: 361921 (ubuntu - 24/10/10)

Section: 4 (Pilotes et protocoles réseau)


BSD mandoc

NAME

mld - Multicast Listener Discovery Protocol

SYNOPSIS

In sys/types.h In sys/socket.h In netinet/in.h In netinet/in_systm.h In netinet/ip6.h In netinet/icmp6.h In netinet6/mld6.h Ft int Fn socket AF_INET6 SOCK_RAW IPPROTO_ICMPV6

DESCRIPTION

MLD is a control plane protocol used by IPv6 hosts and routers to propagate multicast group membership information. Normally this protocol is not used directly, except by the kernel itself, in response to multicast membership requests by user applications. Multicast routing protocol daemons may open a raw socket to directly interact with and receive membership reports.

As of Fx 8.0 , MLD version 2 is implemented. This adds support for Source-Specific Multicast (SSM), whereby applications may communicate to upstream multicast routers that they are only interested in receiving multicast streams from particular sources. The retransmission of state-change reports adds some robustness to the protocol.

SYSCTL VARIABLES

net.inet6.mld.stats
This opaque read-only variable exposes the stack-wide MLDv2 protocol statistics to netstat(1).
net.inet6.mld.ifinfo
This opaque read-only variable exposes the per-link MLDv2 status to ifmcstat(8).
net.inet6.mld.gsrdelay
This variable specifies the time threshold, in seconds, for processing Group-and-Source Specific Queries (GSR). As GSR query processing requires maintaining state on the host, it may cause memory to be allocated, and is therefore a potential attack point for Denial-of-Service (DoS). If more than one GSR query is received within this threshold, it will be dropped, to mitigate the potential for DoS.
net.inet6.mld.v1enable
If this variable is non-zero, then MLDv1 membership queries (and host reports) will be processed by this host, and backwards compatibility will be enabled until the v1 'Older Version Querier Present' timer expires. This sysctl is normally enabled by default.

SEE ALSO

ifmcstat(8), inet(4), multicast(4), netstat(1), sourcefilter(3)

HISTORY

The manual page appeared in Fx 8.0 .
L'amour est un acte sans importance, puisque tout le monde peut le
faire.
-+- Jacques Jouet, Actes de la machine ronde, 1994 -+-