inet6_rthdr_segments()

Count the segments in an IPv6 routing header

Synopsis:

#include <netinet/in.h>


int inet6_rthdr_segments(const struct cmsghdr *cmsg);


Arguments:

cmsg
A pointer to Ancillary data containing a routing header.

Library:

libsocket

Use the -l socket option to qcc to link against this library.

Description:

inet6_rthdr_segments()

This function returns the number of segments (addresses) contained in the Routing header described by cmsg.

Based on:

  • W. Stevens and M. Thomas, Advanced Sockets API for IPv6, RFC 2292, February 1998. Contains good examples.
  • S. Deering and R. Hinden, Internet Protocol, Version 6 (IPv6) Specification, RFC 2460, December 1998.

Returns:

1 to 23
Success.
-1
An error has occurred.

Classification:

RFC 2292

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes

Last modified: 2013-12-23

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