- fix returned buffer amount, to make sure channel bugs don't affect connections

1 files changed, 7 insertions, 0 deletions

diff --git a/src/cadet/gnunet-service-cadet_tunnel.c b/src/cadet/gnunet-service-cadet_tunnel.c
index fc095bfdd..0852394d0 100644
--- a/src/cadet/gnunet-service-cadet_tunnel.c
+++ b/src/cadet/gnunet-service-cadet_tunnel.c
@@ -44,6 +44,7 @@
 #endif
 
 #define MIN_TUNNEL_BUFFER       8
+#define MAX_TUNNEL_BUFFER       64
 #define MAX_SKIPPED_KEYS        64
 #define MAX_KEY_GAP             256
 #define AX_HEADER_SIZE (sizeof (uint32_t) * 2\
@@ -3889,6 +3890,12 @@ GCT_get_channels_buffer (struct CadetTunnel *t)
   }
   if (MIN_TUNNEL_BUFFER > buffer)
     return MIN_TUNNEL_BUFFER;
+
+  if (MAX_TUNNEL_BUFFER < buffer)
+  {
+    GNUNET_break (0);
+    return MAX_TUNNEL_BUFFER;
+  }
   return buffer;
 }