leasefile: do not output expired dhcpv6 leases

Sometimes ip that is assigned to a host changes, old ip is still kept aroung as 'expired'.
This expired ip gets dumped into leasefile and is read by dnsmasq.
The result is that hotsname is resolved into expired ip and that confuses clients.
This patch prevents expired leases from being written into leasefile.

diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index 181973d20328b017523e635c6bff957ef13bb582..fe4713004e5a964469fa85e25894cbf6652064a9 100644 (file)
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -258,6 +258,8 @@ void dhcpv6_write_statefile(void)
                                        for (size_t i = 0; i < addrlen; ++i) {
                                                if (addrs[i].prefix > 96)
                                                        continue;
+                                               if (c->valid_until <= now)
+                                                       continue;
 
                                                addr = addrs[i].addr;
                                                if (c->length == 128)