diff options
Diffstat (limited to 'src/resolve/resolved-dns-scope.c')
| -rw-r--r-- | src/resolve/resolved-dns-scope.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c index 291d0356be..8d03049c10 100644 --- a/src/resolve/resolved-dns-scope.c +++ b/src/resolve/resolved-dns-scope.c @@ -353,6 +353,12 @@ int dns_scope_llmnr_membership(DnsScope *s, bool b) { if (fd < 0) return fd; + /* Always first try to drop membership before we add + * one. This is necessary on some devices, such as + * veth. */ + if (b) + setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn)); + if (setsockopt(fd, IPPROTO_IP, b ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn)) < 0) return -errno; @@ -366,6 +372,9 @@ int dns_scope_llmnr_membership(DnsScope *s, bool b) { if (fd < 0) return fd; + if (b) + setsockopt(fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)); + if (setsockopt(fd, IPPROTO_IPV6, b ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) return -errno; } else |