NET_GETMTU(9F) Kernel Functions for Drivers NET_GETMTU(9F)

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 |
+--------------------+-----------------+

SEE ALSO

net_phygetnext(9F), net_phylookup(9F), net_protocol_lookup(9F)

May 1, 2008 NET_GETMTU(9F)