1 odhcp6c - Embedded DHCPv6 Client
6 odhcp6c is a minimal DHCPv6 and RA-client for use in embedded Linux systems
7 especially routers. It compiles to only about 30 KB (-Os -s).
12 1. IPv6 bootstrap from different environments with autodetection
14 b) RA + stateless DHCPv6
15 c) RA + stateful DHCPv6 (either IA_NA or IA_PD or both)
17 2. Handling of non-temporary addresses (IA_NA)
18 a) handling of valid and preferred lifetimes
19 b) duplicate address detection
20 c) automatic fallback to stateless or PD-only mode
22 3. Support for DHCPv6 extension
23 a) Reconfigure-Messages
24 b) Prefix Delegation (including handling of valid and preferred lifetimes)
26 d) DNS Configuration Options
29 g) Information-Refresh Options
30 h) SOL_MAX_RT default to 3600
31 i) DS-Lite AFTR-Name Option
33 4. Support for requesting and parsing Router Advertisements
34 a) parsing of prefixes, routes, MTU and RDNSS options
40 * To prepare a Makefile use: "cmake ."
41 * To build / install use: "make" / "make install" afterwards.
42 * To build DEB or RPM packages use: "make package" afterwards.
47 The state script is called whenever the DHCPv6 state changes.
48 The script is called with the following parameters: <interface> <state>
52 * started The DHCPv6 client has been started
53 * bound A suitable server was found and addresses or prefixes acquired
54 * informed A stateless information request returned updated information
55 * updated Updated information was received from the DHCPv6 server
56 * ra-updated Updated information was received from via Router Advertisement
57 * rebound The DHCPv6 client switched to another server
58 * unbound The DHCPv6 client lost all DHCPv6 servers and will restart
59 * stopped The DHCPv6 client has been stopped
63 * RDNSS A space-separated list of recursive DNS servers
64 * DOMAINS A space-separated list of DNS search domains
65 * SNTP_IP A space-separated list of SNTP server IP addresses
66 * SNTP_FQDN A space-separated list of SNTP server FQDNs
67 * SIP_IP A space-separated list of SIP servers
68 * SIP_DOMAIN A space-separated list of SIP domains
69 * OPTION_<num> Custom option received as base-16
70 * PREFIXES A space-separated list of prefixes currently assigned
71 Format: <prefix>/<length>,preferred,valid[,excluded=<excluded-prefix>/<length>][,class=<prefix class #>]
72 * ADDRESSES A space-separated list of addresses currently assigned
73 Format: <address>/<length>,preferred,valid
74 * RA_ADDRESSES A space-separated list of addresses from RA-prefixes
75 Format: <address>/<length>,preferred,valid
76 * RA_ROUTES A space-separated list of routes from the RA
77 Format: <address>/<length>,gateway,valid,metric
78 * RA_DNS A space-separated list of recursive DNS servers from the RA
79 * AFTR The DS-Lite AFTR domain name
80 * AFTR_IP The DS-Lite AFTR resolved IPv6 address