Type 2 IPV6_RTHDR socket option may not be allowed at the application
level in order to prevent denial-of-service attacks or man-in-the-
middle attacks by hackers. Sending and receiving of mobility header
messages are possible by IPv6 RAW sockets. Thus, it is assumed that
this operation is only possible by privileged users. However, this
API does not prevent the existing security threat from a hacker
sending a bogus mobility header or other IPv6 packets using the Home
Address option and Type 2 Routing Header extensions.
10. IANA Considerations
This document does not define a new protocol. However, it uses the
Mobility Header Protocol for IPv6 to define an API for the
/etc/protocols file. (ref: http://www.iana.org/assignments/protocol-
numbers)
11. Acknowledgements
Thanks to Brian Haley for the thorough review of this document and
many helpful comments. Keiichi Shima, Alexandru Petrescu, Ryuji
Wakikawa, Vijay Devarapalli, Jim Bound, Suvidh Mathur, Karen Nielsen,
Mark Borst, Vladislav Yasevich, and other mobile-ip working group
members provided valuable input. Antti Tuominen suggested the
routing header type function for this API document. During IESG
review, Bill Fenner suggested accessing the routing header type
directly for being consistent with RFC3542. A new socket option for
Home Address Destination Option is added per Bill Fenner’s suggestion
for clarity of extension header orders. Thanks to Thomas Narten and
Jari Arkko for the review of this document.
12. References
12.1. Normative References
[1] Stevens, W., Thomas, M., Nordmark, E., and T. Jinmei, "Advanced
Sockets Application Program Interface (API) for IPv6", RFC 3542,
May 2003.
[2] Johnson, D., Perkins, C., and J. Arkko, "Mobility Support in
IPv6", RFC 3775, June 2004.
12.2. Informative References
[3] Deering, S. and R. Hinden, "Internet Protocol, Version 6 (IPv6)
Specification", RFC 2460, December 1998.
[4] Devarapalli, V., Wakikawa, R., Petrescu, A., and P. Thubert,
"Network Mobility (NEMO) Basic Support Protocol", RFC 3963,
January 2005.
[5] Nordmark, E., "IPv6 Socket API for source address selection",
Work in Progress, July 2005.
[6] Gilligan, R., Thomson, S., Bound, J., McCann, J., and W.
Stevens, "Basic Socket Interface Extensions for IPv6", RFC 3493,
February 2003.
Authors’ Addresses
Samita Chakrabarti
EMail: samitac2@gmail.com
Erik Nordmark
Sun Microsystems
17 Network Circle
Menlo Park, CA 94025
USA
Phone: +1 650 786 2921
EMail: erik.nordmark@sun.com
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