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ndisc: honor IPv6AcceptRA.UseDNS when parsing RA options (#5071)

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RDNSS and DNSLL options received in RA are always used, possibly breaking the resolution of private domains hosted on a local DNS server. When setting UseDNS=no in a [IPv6AcceptRA] section of a .network file, both RDNSS and DNSLL options in received RA should be ignored. 

Fixes: #5040
This commit is contained in:
Cédric Schieli 2017-01-16 18:23:26 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent e52b13cfc4
commit fe0252e5b8
1 changed files with 4 additions and 2 deletions
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6
src/network/networkd-ndisc.c
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@ -587,11 +587,13 @@ static void ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
break;
case SD_NDISC_OPTION_RDNSS:
ndisc_router_process_rdnss(link, rt);
if (link->network->ipv6_accept_ra_use_dns)
ndisc_router_process_rdnss(link, rt);
break;
case SD_NDISC_OPTION_DNSSL:
ndisc_router_process_dnssl(link, rt);
if (link->network->ipv6_accept_ra_use_dns)
ndisc_router_process_dnssl(link, rt);
break;
}