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Get a pointer to an IPv6 address in the routing header
#include <netinet/in.h>
struct in6_addr * inet6_rthdr_getaddr(
struct cmsghdr *cmsg,
int index);
- cmsg
- A pointer to the Ancillary data containing the routing header.
- index
- A value between 0 and the number returned by inet6_rthdr_segments().
libsocket
Use the -l socket option to
qcc
to link against this library.
This function returns a pointer to the IPv6 address specified
by index
in the routing header described by cmsg.
The index must have a value between 1
and the number returned by
inet6_rthdr_segments(). You should first call
inet6_rthdr_segments()
to obtain the number of segments in the Routing header.
A pointer to the IPv6 address, or NULL if an error occured.
RFC 2292
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
inet6_rthdr_add(),
inet6_rthdr_getflags(),
inet6_rthdr_init(),
inet6_rthdr_lasthop(),
inet6_rthdr_reverse(),
inet6_rthdr_segments(),
inet6_rthdr_space()
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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