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Count the segments in an IPv6 routing header
#include <netinet/in.h>
int inet6_rthdr_segments(const struct cmsghdr *cmsg);
- cmsg
- A pointer to Ancillary data containing a routing header.
libsocket
Use the -l socket option to
qcc
to link against this library.
This function returns the number of segments (addresses)
contained in the Routing header described by cmsg.
- 1 to 23
- Success.
- -1
- An error has occurred.
RFC 2292
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
inet6_rthdr_add(),
inet6_rthdr_getaddr(),
inet6_rthdr_getflags(),
inet6_rthdr_init(),
inet6_rthdr_lasthop(),
inet6_rthdr_reverse(),
inet6_rthdr_space()
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.
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