Remove an unused variable.

[tinc] / src / net_socket.c

diff --git a/src/net_socket.c b/src/net_socket.c
index d0beb19..6828da7 100644 (file)
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -594,7 +594,6 @@ void handle_new_meta_connection(void *data, int flags) {
        // Check if we get many connections from the same host
 
        static sockaddr_t prev_sa;
-       static time_t prev_time;
        static int tarpit = -1;
 
        if(tarpit >= 0) {
@@ -602,14 +601,25 @@ void handle_new_meta_connection(void *data, int flags) {
                tarpit = -1;
        }
 
-       if(prev_time == now.tv_sec && !sockaddrcmp_noport(&sa, &prev_sa)) {
-               // if so, keep the connection open but ignore it completely.
-               tarpit = fd;
-               return;
+       if(!sockaddrcmp_noport(&sa, &prev_sa)) {
+               static int samehost_burst;
+               static int samehost_burst_time;
+
+               if(now.tv_sec - samehost_burst_time > samehost_burst)
+                       samehost_burst = 0;
+               else
+                       samehost_burst -= now.tv_sec - samehost_burst_time;
+
+               samehost_burst_time = now.tv_sec;
+               samehost_burst++;
+
+               if(samehost_burst > max_connection_burst) {
+                       tarpit = fd;
+                       return;
+               }
        }
 
        memcpy(&prev_sa, &sa, sizeof sa);
-       prev_time = now.tv_sec;
 
        // Check if we get many connections from different hosts