1 odhcp6c - Embedded DHCPv6 Client 2 3 4 ** Abstract ** 5 6 odhcp6c is a minimal DHCPv6 and RA-client for use in embedded Linux systems 7 especially routers. It compiles to only about 35 KB (-Os -s). 8 9 10 ** Features ** 11 12 1. IPv6 bootstrap from different environments with autodetection 13 a) RA only 14 b) RA + stateless DHCPv6 15 c) RA + stateful DHCPv6 (either IA_NA or IA_PD or both) 16 17 2. Handling of non-temporary addresses (IA_NA) 18 a) handling of valid and preferred lifetimes 19 b) automatic fallback to stateless or PD-only mode 20 21 3. Support for DHCPv6 extension 22 a) Reconfigure-Messages 23 b) Prefix Delegation (including handling of valid and preferred lifetimes) 24 c) Prefix Exclusion 25 d) DNS Configuration Options 26 e) NTP Options 27 f) SIP Options 28 g) Information-Refresh Options 29 h) Configurable SOL_MAX_RT 30 i) DS-Lite AFTR-Name Option 31 j) Softwire address and port mapped clients (MAP, LW4over6) 32 j) CER-ID (experimental) 33 k) Server unicast Option 34 35 4. Support for requesting and parsing Router Advertisements 36 a) parsing of prefixes, routes, MTU and RDNSS options 37 38 39 ** Compiling ** 40 41 odhcp6c uses cmake: 42 * To prepare a Makefile use: "cmake ." 43 * To build / install use: "make" / "make install" afterwards. 44 * To build DEB or RPM packages use: "make package" afterwards. 45 46 47 ** State Script ** 48 49 The state script is called whenever the DHCPv6 state changes. 50 The script is called with the following parameters: <interface> <state> 51 52 53 States: 54 * started The DHCPv6 client has been started 55 * bound A suitable server was found and addresses or prefixes acquired 56 * informed A stateless information request returned updated information 57 * updated Updated information was received from the DHCPv6 server 58 * ra-updated Updated information was received from via Router Advertisement 59 * rebound The DHCPv6 client switched to another server 60 * unbound The DHCPv6 client lost all DHCPv6 servers and will restart 61 * stopped The DHCPv6 client has been stopped 62 63 64 Environment: 65 * RDNSS A space-separated list of recursive DNS servers 66 * DOMAINS A space-separated list of DNS search domains 67 * SNTP_IP A space-separated list of SNTP server IP addresses 68 * SNTP_FQDN A space-separated list of SNTP server FQDNs 69 * SIP_IP A space-separated list of SIP servers 70 * SIP_DOMAIN A space-separated list of SIP domains 71 * OPTION_<num> Custom option received as base-16 72 * PREFIXES A space-separated list of prefixes currently assigned 73 Format: <prefix>/<length>,preferred,valid[,excluded=<excluded-prefix>/<length>][,class=<prefix class #>] 74 * ADDRESSES A space-separated list of addresses currently assigned 75 Format: <address>/<length>,preferred,valid 76 * RA_ADDRESSES A space-separated list of addresses from RA-prefixes 77 Format: <address>/<length>,preferred,valid 78 * RA_ROUTES A space-separated list of routes from the RA 79 Format: <address>/<length>,gateway,valid,metric 80 * RA_DNS A space-separated list of recursive DNS servers from the RA 81 * RA_DOMAINS A space-separated list of DNS search domains from the RA 82 * RA_HOPLIMIT Highest hop-limit received in RAs 83 * RA_MTU MTU-value received in RA 84 * RA_REACHABLE ND Reachability time 85 * RA_RETRANSMIT ND Retransmit time 86 * AFTR The DS-Lite AFTR domain name 87 * MAPE / MAPT / LW4O6 Softwire rules for MAPE, MAPT and LW4O6
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