X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fresolve%2Fresolved-dns-scope.c;h=a39e705a3ba60c39df5d30bf13d3beab231fc6f5;hp=0a70cb1f0f6486ff9e79fcc91069d305b09cb0e0;hb=e1c959948c0e31d6997bcdfbabfbd077784b2bae;hpb=76f468c8ea568fce98fa75d7f1d540256eb0940a

diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c
index 0a70cb1f0..a39e705a3 100644
--- a/src/resolve/resolved-dns-scope.c
+++ b/src/resolve/resolved-dns-scope.c
@@ -102,8 +102,19 @@ int dns_scope_send(DnsScope *s, DnsPacket *p) {
                         return -EMSGSIZE;
 
                 ifindex = s->link->ifindex;
+        } else {
+                uint32_t mtu;
+
+                mtu = manager_find_mtu(s->manager);
+                if (mtu > 0) {
+                        if (p->size > mtu)
+                                return -EMSGSIZE;
+                }
         }
 
+        if (p->size > DNS_PACKET_UNICAST_SIZE_MAX)
+                return -EMSGSIZE;
+
         if (srv->family == AF_INET)
                 r = manager_dns_ipv4_send(s->manager, srv, ifindex, p);
         else if (srv->family == AF_INET6)