Detect and log queries for .gnunet.-Domains

1 files changed, 12 insertions, 2 deletions

diff --git a/src/vpn/gnunet-service-dns.c b/src/vpn/gnunet-service-dns.c
index 229741252..1545d6cb2 100644
--- a/src/vpn/gnunet-service-dns.c
+++ b/src/vpn/gnunet-service-dns.c
@@ -32,6 +32,7 @@
 #include "gnunet-vpn-packet.h"
 #include "gnunet-vpn-pretty-print.h"
 #include "gnunet_container_lib.h"
+#include "gnunet-dns-parser.h"
 
 struct dns_cls {
         struct GNUNET_SCHEDULER_Handle *sched;
@@ -69,10 +70,21 @@ void unhijack(unsigned short port) {
         GNUNET_OS_start_process(NULL, NULL, "gnunet-helper-hijack-dns", "gnunet-hijack-dns", "-d", port_s, NULL);
 }
 
+/**
+ * This receives the dns-payload from the daemon-vpn and sends it on over the udp-socket
+ */
 void receive_query(void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message)
 {
         struct query_packet* pkt = (struct query_packet*)message;
         struct dns_pkt* dns = (struct dns_pkt*)pkt->data;
+        struct dns_pkt_parsed* pdns = parse_dns_packet(dns);
+
+        if (pdns->queries[0]->namelen > 9 &&
+            0 == strncmp(pdns->queries[0]->name+(pdns->queries[0]->namelen - 9), ".gnunet.", 9)) {
+            GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Query for .gnunet!\n");
+        }
+
+        GNUNET_free(pdns);
 
         struct sockaddr_in dest;
         memset(&dest, 0, sizeof dest);
@@ -136,8 +148,6 @@ static void read_response (void *cls, const struct GNUNET_SCHEDULER_TaskContext
                 answer->pkt.dst_port = query_states[dns->s.id].local_port;
                 memcpy(answer->pkt.data, buf, r);
 
-                pkt_printf_dns((struct dns_pkt*)buf);
-
                 GNUNET_CONTAINER_DLL_insert_after(mycls.head, mycls.tail, mycls.tail, answer);
 
                 /* struct GNUNET_CONNECTION_TransmitHandle* th = */ GNUNET_SERVER_notify_transmit_ready(query_states[dns->s.id].client, len, GNUNET_TIME_UNIT_FOREVER_REL, &send_answer, query_states[dns->s.id].client);