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:
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 occurred.
Classification:
RFC 2292
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |