inet6_rthdr_getflags()

Updated: October 26, 2022

Get the flags for a segment in an IPv6 routing header

Synopsis:

#include <netinet/in.h>

int inet6_rthdr_getflags( const struct cmsghdr *cmsg, 
                          int index);

Arguments:

cmsg
A pointer to the ancillary data containing the routing header.
index
A value between 0 and the number returned by inet6_rthdr_segments().

Library:

libsocket

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

Description:

This function returns the flags for the segment specified by index in the routing header described by cmsg. The index must have a value between 0 and the number returned by inet6_rthdr_segments().

Note: Addresses are indexed starting at 1, and flags starting at 0. They're consistent with the terminology and figures in RFC2460.

Based on:

Returns:

IPV6_RTHDR_LOOSE or IPV6_RTHDR_STRICT for an IPv6 Type 0 routing header, or -1 if an error occurred.

Classification:

RFC 2292

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