NAME¶
socket_getifidx - get interface number
SYNTAX¶
#include <socket.h>
int
socket_getifidx(const char*
ifname);
DESCRIPTION¶
socket_getifidx returns the interface number for a symbolic network interface
name (like "eth0" on Linux, for example).
The interface number can be used as scope_id for IPv6 communications on
link-local addresses.
If something goes wrong, socket_getifidx returns -1, setting errno
appropriately.
SEE ALSO¶
socket_getifname(3),
socket_connect6(3)
