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rdisc: don't add new RDNSS and DNSSL options with zero lifetime

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A lifetime of 0 means that the domain or server should no longer
be used, so if we get an RA with a zero-lifetime DNS server or
domain that we haven't seen before, don't bother adding it to the
list.

DNS servers and domains that are already known and become zero
lifetime in the next RA are already correctly handled by
clean_dns_servers() and clean_domains().
This commit is contained in:
Dan Williams 2013-12-19 12:05:54 -06:00
parent 3f654dc6e6
commit b705d7f50e
1 changed files with 8 additions and 0 deletions
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8
src/rdisc/nm-lndp-rdisc.c
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@ -162,6 +162,10 @@ add_dns_server (NMRDisc *rdisc, const NMRDiscDNSServer *new)
}
}
/* DNS server should no longer be used */
if (new->lifetime == 0)
return FALSE;
g_array_insert_val (rdisc->dns_servers, i, *new);
return TRUE;
}
@ -187,6 +191,10 @@ add_dns_domain (NMRDisc *rdisc, const NMRDiscDNSDomain *new)
}
}
/* Domain should no longer be used */
if (new->lifetime == 0)
return FALSE;
g_array_insert_val (rdisc->dns_domains, i, *new);
item = &g_array_index (rdisc->dns_domains, NMRDiscDNSDomain, i);
item->domain = g_strdup (new->domain);