From: Matthias Wachs <wachs@net.in.tum.de>
Date: Tue, 21 Dec 2010 16:43:55 +0000 (+0000)
Subject: safety check
X-Git-Tag: initial-import-from-subversion-38251~19448
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=6d041865665cf4eb776c9d1713b7dd73385b4fb2;p=oweals%2Fgnunet.git

safety check
---

diff --git a/src/transport/gnunet-service-transport.c b/src/transport/gnunet-service-transport.c
index 0bb19a9cf..b2fa62d0d 100644
--- a/src/transport/gnunet-service-transport.c
+++ b/src/transport/gnunet-service-transport.c
@@ -4516,9 +4516,10 @@ handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
       memcpy (&pong[1],
 	      plugin->short_name,
 	      slen);
-      memcpy (&((char*)&pong[1])[slen],
-	      sender_address,
-	      sender_address_len);
+      if ((sender_address!=NULL) && (sender_address_len > 0))
+		  memcpy (&((char*)&pong[1])[slen],
+			  sender_address,
+			  sender_address_len);
       if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
 	{
 	  /* create / update cached sig */