From 15f29baef45e38424240503af228ca46cd95235c Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 20 Dec 2013 21:36:24 +0000
Subject: [PATCH] -this should fix #3228 (communicate conversation/reconnect
 errors to client)

---
 src/conversation/conversation_api_call.c  | 6 +++++-
 src/conversation/gnunet-conversation.c    | 5 +++++
 src/include/gnunet_conversation_service.h | 9 ++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/conversation/conversation_api_call.c b/src/conversation/conversation_api_call.c
index 418af0b73..16173a4fb 100644
--- a/src/conversation/conversation_api_call.c
+++ b/src/conversation/conversation_api_call.c
@@ -416,6 +416,8 @@ handle_gns_response (void *cls,
   struct GNUNET_MQ_Envelope *e;
   struct ClientCallMessage *ccm;
 
+  GNUNET_break (NULL != call->gns_lookup);
+  GNUNET_break (CS_LOOKUP == call->gns_lookup);
   call->gns_lookup = NULL;
   for (i=0;i<rd_count;i++)
   {
@@ -516,8 +518,10 @@ reconnect_call (struct GNUNET_CONVERSATION_Call *call)
   }
   call->state = CS_SHUTDOWN;
   call->client = GNUNET_CLIENT_connect ("conversation", call->cfg);
-  if (NULL == call->client)
+  if (NULL == call->client);
     return;
+  call->event_handler (call->event_handler_cls,
+                       GNUNET_CONVERSATION_EC_CALL_ERROR);
   call->mq = GNUNET_MQ_queue_for_connection_client (call->client,
                                                     handlers,
                                                     &call_error_handler,
diff --git a/src/conversation/gnunet-conversation.c b/src/conversation/gnunet-conversation.c
index b81743933..a042629cc 100644
--- a/src/conversation/gnunet-conversation.c
+++ b/src/conversation/gnunet-conversation.c
@@ -411,6 +411,11 @@ call_event_handler (void *cls,
              _("Connection to `%s' resumed (by other user)\n"),
              peer_name);
     break;
+  case GNUNET_CONVERSATION_EC_CALL_ERROR:
+    FPRINTF (stdout,
+             _("Error with the call, restarting it\n"));
+    call_state = CS_RESOLVING;
+    break;
   }
 }
 
diff --git a/src/include/gnunet_conversation_service.h b/src/include/gnunet_conversation_service.h
index cfe4a64ba..c610dd0bd 100644
--- a/src/include/gnunet_conversation_service.h
+++ b/src/include/gnunet_conversation_service.h
@@ -333,7 +333,14 @@ enum GNUNET_CONVERSATION_CallEventCode
    * both sides can independently suspend and resume calls; a call is
    * only "working" of both sides are active.
    */
-  GNUNET_CONVERSATION_EC_CALL_RESUMED
+  GNUNET_CONVERSATION_EC_CALL_RESUMED,
+
+  /**
+   * We had an error handing the call, and are now restarting it
+   * (back to lookup).  This happens, for example, if the peer
+   * is restarted during a call.
+   */
+  GNUNET_CONVERSATION_EC_CALL_ERROR
 
 };
 
-- 
2.25.1