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| socket_getifidx(3) | FreeBSD Library Functions Manual | socket_getifidx(3) |
NAME
socket_getifidx - get interface numberSYNTAX
#include <libowfat/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)
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