if nametoindex

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#include <trsocket.h>

unsigned int if_nametoindex

(const char * ifname);

Function Description

This function supports both IPv4 and IPv6. Refer to [RFC 2553]. Maps an interface name into its corresponding interface index.

Parameters

• ifname

  Interface name

Returns

• 0

  Failed. Call tfGetSocketError() for the specific error code.

• >0

  Interface index

If if_nametoindex fails, the error code can be retrieved with tfGetSocketError() which will return one of the following:

• TM_ENXIO

  The specified interface name does not exist.

• TM_EINVAL

  Bad parameter value.

Table of Contents >> IPv6 Programmer's Reference