Name Service in IPv6 Mobile Adhoc Network connected to the Internet

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Name Service in IPv6 Mobile Ad-hoc Network
connected to the Internet

• Jaehoon Jeong, ETRIpaul_at_etri.re.krhttp//www.adh
  oc.6ants.net/paul/

PIMRC 2003
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Contents

• Introduction
• Related Work
• Name Service within IPv6 MANET
• Ad-hoc Name Service System (ANS)
• Name Service for the Internet
• Procedure of DNS Name Resolution
• Conclusion

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Introduction

• Name Service in Mobile Ad-hoc Network(MANET)
• MANET has dynamic network topology
• Current DNS can not be adopted in MANET!
• Because it needs a fixed and well-known name
  server
• Idea of Name Service in MANET
• All the mobile nodes take part in name service
• Every mobile node administers its own name
  information
• It responds to the other nodes DNS query related
  to its domain name and IP address

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Related Work (1/2) Link-Local Multicast Name
Resolution (LLMNR)

• DNS service based on IP multicast in link-local
  scoped network
• IETF DNSEXT working group item
• Each node performs the role of DNS name server
  for its own domain name.

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Related Work (2/2) Autoconfiguration Technology

• IP Interface Configuration
• Name Service
• Translation between host name and IP address
• Generation of unique domain name
• IP Multicast Address Allocation
• Service Discovery
• Unicast Service
• Multicast Service

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Ad-hoc Name Service Systemfor IPv6 MANET (ANS)

• ANS provides Name Service in MANET
• MANET DNS Domain
• ADHOC.
• MANET IPv6 Prefix
• IPv6 Site-local Prefix
• FEC0000/64
• Architecture of ANS System
• ANS Responder
• It performs the role of DNS Name Server
• ANS Resolver
• It performs the role of DNS Resolver

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ANS System (1/2)
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ANS System (2/2)
ANS API
ANS Responder
ANS Resolver
DNS Query / DNS Response
Main-Thread
Main-Thread
ANS Cache
ANSZone DB
DNS Query
Resolv-Thread
Timer-Thread
DUR-Thread
DNSResponse
Process
Memeory Read / Write
Process
UNIX Datagram Socket
Thread
Memeory Read / Write
Thread
Internal Connection
Cache
Internal Connection
Database
UDP Socket Connection
UDP Socket Connection
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Name Service in ANS

• Name Generation
• generates a unique domain name based on the
  network device identifier
• Zone File Generation
• generates ANS zone file with the unique domain
  name and corresponding IPv6 address
• Name Resolution
• performs the name-to-address translation
• Service Discovery
• performs the service discovery through DNS SRV
  resource record, which indicates the location of
  server or the multicast address of the service

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Scenario of Name Service within MANET
MN-C
MN-A
MN-B
Request ofHost DNS Name Resolution
DNS Query Message(MN-C.ADHOC.)
DNS Query Messageis sent in Multicast
Receipt of DNS Query Message
DNS Query Message(MN-C.ADHOC.)
Receipt and Processof DNS Query Message
DNS Response Message(MN-Cs IPv6 Address)
DNS Response Messageis sent in Unicast
Gain ofDNS Information
MN-A tries to connect to the server on MN-C
The server on MN-C acceptsthe request of the
connection from MN-A
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Name Service for the Internet

• When a MANET Node communicates with an Internet
  Node,
• MANET Node should find out Internet Gateway(s).
• MANET Node should resolve the Internet Nodes
  DNS name into its globally routable IPv6
  address.
• Discovery of Internet Gateway
• RS/RA-based Discovery
• Discovery of Global DNS Server
• Recursive DNS Server (RDNSS) Option within RA

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Discovery of Internet Gateway (IGW) Recursive
DNS Server (RDNSS)
RA Message from IGW2
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Procedure of DNS Name Resolution
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Conclusion

• ANS (Ad-hoc Name Service System for IPv6 MANET)
• A new name service scheme in IPv6 MANET connected
  to the Internet.
• Name Service of ANS
• Automatic name generation
• Automatic zone file generation
• Name-to-address translation
• Name Resolution of MANET Node
• Name Resolution of Internet Node
• Service discovery
• Future Work
• We will enhance ANS to provide secure name
  service.
• Authentication of DNS response message
• through Pre-shared group key and IPsec ESPs
  null-transformor
• through Pre-shared group key and DNS TSIG
  (RFC2845)
• TSIG Secret Key Transaction Authentication for
  DNS