net_getmtu - determine the MTU of a given network interface
#include <sys/neti.h>
int net_getmtu(const net_data_t net, const phy_if_t ifp);
illumos DDI specific (illumos DDI).
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.
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.
The net_getmtu() function may be called from user, kernel, or interrupt
context.
See attributes(7) for descriptions of the following attributes:
ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
Interface Stability |
Committed |