October 2006ESW'061 Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information draft-ietf-geopriv-dhcp-civil-09 Henning Schulzrinne Columbia University

October 2006ESW'062 Overview Complementary to RFC 3825 (geo) Meant for network operator to convey civil location to device –country, administrative units, street, floor –use cases: emergency services, device management Likely applications: –enterprise LAN –hotel, airport hot spots –home networks Does not provide location to third parties, just own location to target Attempts to be country-neutral –just assumes a hierarchical division of country –extensible if more descriptors are needed later Support both civic (street) and postal addresses

October 2006ESW'063 DHCPv4 Format GEOCONF_CIVIC length what (server, NE, client) country code civic address elements what: DHCP, closest network element or client country code: e.g., US, DE

October 2006ESW'064 Element format CAtypeCAlength CAvalue CAtype: type of data CAlength: length (bytes) of CAvalue

October 2006ESW'065 Elements: Administrative Subdivisions A1national subdivision state, canton, region, province, prefecture A2county, parish, gun (JP), district (IN) A3city, township, shi (JP) A4city division, borough, city district, ward, chou (JP) A5neighborhood, block A6group of streets

October 2006ESW'066 Languages and scripts DHCP option uses UTF8 Some elements may have multiple variations –scripts (e.g., Japan) – UTF8 does not necessarily distinguish (“Han unification”) –languages (K öln, Cologne) Others may only have one rendering –street names uses CAtypes 0 (language) and 128 (script) to mark sets of CAtypes –language: e.g., “de-CH” = German as used in Switzerland –script: e.g., “Latn”

October 2006ESW'067 Street Names NENAPIDFDescriptionExample PRD Leading street directionN POD Trailing street suffixSW STS Street suffix or typeAve, Platz HNO House number123 HNS House number suffixA, ½ LMK Landmark or vanity addressColumbia University LOC Additional location informationSouth Wing NAM name (residence and office occupant) Joe’s Barbershop BLDbuilding (structure)Low Library UNITunit (apartment, suite)Apt 42 FLRfloor number4 room number450F ZIPPCpostal/zip code

October 2006ESW'068 More location elements NENAPIDFDescriptionExample PLCPlace typeoffice PCNPostal community nameLeonia POBOXpost office box12345 ADDCODEadditional code (JP) SEATseat (desk, cubicle, workstation) RED = draft-ietf-geopriv-revised-civic-lo

October 2006ESW'069 Branching streets NENAPIDFDescriptionExample RDPrimary road or streetBroadway RDSECRoad section14 RDBRRoad branchLane 7 RDSUBBRRoad sub-branch Alley 8 PRMStreet name pre-modifierOld POMStreet name post-modifierService West Alice Pde. Section 1Section 2Section 3 Carol Ln Alley 2

October 2006ESW'0610 Conclusion Attempt at global civic address format –including multi-script and multi-language addresses –extensible (within DHCP size constraints) Supports both postal and civic addresses Being mapped to XML (PIDF) format