resolved: add missing error code check when initializing DNS-over-TLS

[thirdparty/systemd.git] / src / resolve / resolved-dns-packet.h

diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h
index 5ebaff33d710fab04f2c0e0af37b0783d9c6832d..56614c4a071756ad76ca59c7f20089fe5a27a166 100644 (file)
--- a/src/resolve/resolved-dns-packet.h
+++ b/src/resolve/resolved-dns-packet.h
@@ -117,7 +117,10 @@ static inline uint16_t DNS_PACKET_RCODE(DnsPacket *p) {
 
 static inline uint16_t DNS_PACKET_PAYLOAD_SIZE_MAX(DnsPacket *p) {
 
-        /* Returns the advertised maximum datagram size for replies, or the DNS default if there's nothing defined. */
+        /* Returns the advertised maximum size for replies, or the DNS default if there's nothing defined. */
+
+        if (p->ipproto == IPPROTO_TCP) /* we ignore EDNS(0) size data on TCP, like everybody else */
+                return DNS_PACKET_SIZE_MAX;
 
         if (p->opt)
                 return MAX(DNS_PACKET_UNICAST_SIZE_MAX, p->opt->key->class);