NAME

net_getmtu - determine the MTU of a given network interface

SYNOPSIS

#include <sys/neti.h>
int net_getmtu(const net_data_t net, const phy_if_t ifp);

INTERFACE LEVEL

illumos DDI specific (illumos DDI).

PARAMETERS

net

value returned from a successful call to net_protocol_lookup(9F).

ifp

value returned from a successful call to net_phylookup(9F) or net_phygetnext(9F).

DESCRIPTION

The net_getmtu() function receives information about the current MTU of a network interface. The value returned from this function call should not be cached as the MTU of a network interface since it is not guaranteed to be constant.

RETURN VALUES

The net_getmtu() function returns -1 if the network protocol does not support this feature and otherwise returns the current MTU of the network interface.

CONTEXT

The net_getmtu() function may be called from user, kernel, or interrupt context.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Committed