router: fix managed address configuration setting Don't announce managed address configuration in case DHCPv6 is disabled Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
router: improve RFC7084 compliancy Send Router Information Option as well for prefixes with length 64 in order to be compliant with L-3 in RFC7084: An IPv6 CE router must advertise itself as a router for the delegated prefixes using the "Route Information Option". Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
odhcpd: Replace strerror(errno) with %m format Saves a few bytes. Signed-off-by: Rosen Penev <rosenp@gmail.com>
Support muliple RAs on single interface IETF is moving toward implementing IPv6 multihoming by sending multiple RAs on a single interface: - draft-ietf-intarea-provisioning-domains-00 - draft-ietf-rtgwg-enterprise-pa-multihoming-02 odhcpd supports configuration of multiple software interfaces on the same physical interface, which already advertises multiple RAs, but had two issues: - Each RA includes all the prefixes available on the interface. - Replies to sollicits with a single RA. This patch introduces the prefix_filter configuration parameter which allows filtering prefixes that are sent in a given RA, and fixes the sollicit code in order to reply with all the RAs that are configured on a given interface. Signed-off-by: Pierre Pfister <ppfister@cisco.com>
treewide: rework handling of netlink events Rework the handling of netlink events by letting the different modules ndp, ra, dhcpv6 and dhcpv4 install netevent handlers. The installed netevent handlers are called by the netlink logic passing an event indication together with event data. Each netevent handler implements its own event logic; this makes the code more modular and less complex by moving all netlink code to netlink.c While at it rename ia_addr and ia_addr_len into addr6 and addr6_len respectively Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
treewide: align function naming Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
treewide: replace RELAYD prefix naming in macros Remove the unfortunate RELAYD naming in the different macros Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
treewide: reflect managed mode is related to RA Improve code readability by renaming managed into ra_managed and define the according ra_managed flags. This will help to better understand the ra_managed logic as defined in the README file. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
treewide: rework logic to retrieve IPv6 interface addresses Retrieve IPv6 interface addresses when the interface gets created; this allows to get rid of the IPv6 address dump logic in ndp.c. Add IPv4 address support in odhcp_ipaddr struct. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
router: use enum to specify order and index of iov struct Improve code maintainability by using enum to order and index iov struct Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
treewide: rework code to get rid of fixed IPv6 address arrays Rework code to get rid of RELAYD_MAX_PREFIXES and RELAYD_MAX_ADDRS by using dynamic IPv6 address array allocation. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
router: fix interface mtu read error Use integer type for mtu variable as odhcpd_get_interface_config returns -1 when it fails to read the interface mtu. This allows to set the mtu to a meaningfull value of 1280 in case of interface mtu read failure. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
config: make RA retransTime configurable via uci Allow to specify the router advertisement retrans time via the uci parameter ra_retranstime. If retransmit time is not configured the value is set to 0 in RA message meaning undefined.
config: make RA reachableTime configurable via uci Allow to specify the router advertisement reachable time via the uci parameter ra_reachabletime. If reachable time is not configured the value is set to 0 in RA message meaning undefined. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
config: make RA curHopLimit configurable via uci Allow to specify the router advertisement current hop limit via the uci parameter ra_hoplimit. If hoplimit is not configured the hoplimit is taken from the interface as before. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
config: make RA mtu configurable via UCI Allow to specify the router advertisement mtu via the uci parameter ra_mtu. In case the config parameter is not set the MTU is taken from the interface as before. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
rework IPv6 dns address selection (FS#635) Don't return anymore the link local IPv6 address as DNS IPv6 address since different OS implementations (e.g. android, ...) cannot handle a link local IPv6 address as DNS address. IPv6 DNS address selection is reworked as follows : -Consider all global/ULA IPv6 address having a valid lifetime -Give preference to global/ULA IPv6 addresses being not deprecated -Give preference to ULA IPv6 addresses over IPv6 global addresses -Give preference to the IPv6 address with the longest preferred lifetime in its selected category (ULA or global) -If no global/ULA IPv6 address is present use the IPv6 link local address Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
rework IPv6 address dump logic Make the code more logical by moving the IPv6 address dump logic into the different protocol interface enable handlers so it's clear which protocols require interface IPv6 address tracking. At the same time restructure the IPv6 address dump logic so less IPv6 address netlink dumps are created. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
router: don't announce prefixes with valid lifetime equal to 0 Don't set prefix valid lifetime to 0 in case the preferred lifetime equals 0 and valid lifetime gets smaller than 7200. In corner cases it leads to router lifetime being set although no prefixes are announced with a valid lifetime different from 0. Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
router: fix arithmetic exception fault Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>