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Detected by Coverity in CID1412413
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Improve error checking fixing resource leakage detected by Coverity in
CID 1430880
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Saves a few bytes.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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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>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Remove the unfortunate RELAYD naming in the different macros
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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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>
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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>
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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>
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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>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Fix selection of IPv6 DNS address in DHCPv6 and RA overwrite as an address could be selected
with preferred lifetime zero while IPv6 addresses are in use with non zero preferred
lifetimes.
Fix tries to pick the IPv6 address with the longest preferred lifetime now.
Fixes also the issue an IPv6 address with preferred lifetime zero could be returned in DHCPv6
DNS server option while an IPv6 address with non zero preferred lifetime is returned as DNS
recursive RA option for the same set of available IPv6 addresses.
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As described in RFC3315 §15 any solicit, confirm, rebind or information request message is discarded if the destination address is unicast
Likewise any request (§18.2.1), renew (§18.2.3), release (§18.2.6) or decline (§18.2.7) message is discarded and the server replies with the status code use multicast.
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Use enum to index iov struct
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RFC3315 Section 18.2.2 states no reply must returned by the server in case no address(es) are present :
If the server is unable to perform this test (for example, the server does not have information about prefixes on the link to which the client is connected),
or there were no addresses in any of the IAs sent by the client, the server MUST NOT send a reply to the client.
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