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:
- 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:
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 |