inet6_rthdr_lasthop()

Updated: October 26, 2022

Specify the Strict/Loose flag for the final hop of an IPv6 routing header

Synopsis:

#include <netinet/in.h>

int inet6_rthdr_lasthop(struct cmsghdr *cmsg, 
                        unsigned int flags);

Arguments:

cmsg
Ancillary data containing the routing header.
flags
Routing header flags. It's either IPV6_RTHDR_LOOSE, or IPV6_RTHDR_STRICT for an IPv6 Type 0 routing header.

Library:

libsocket

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

Description:

This function specifies the Strict/Loose flag for the final hop of a routing header.

Note: A routing header specifying N intermediate nodes requires N+1 Strict/Loose flags. This requires N calls to inet6_rthdr_add() followed by one call to inet6_rthdr_lasthop().

Based on:

Returns:

0
Success.
-1
An error occurred.

Classification:

RFC 2292

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