Data stuck in receiver buffer when dlt_daemon_user_send_log_level() fails (#21)

- When dlt_daemon_user_send_log_level() called in
dlt_daemon_process_user_message_register_context() fails -1 was returned
which caused dlt_daemon_process_user_messages() to stop processing
receiver buffer. Remaining data was stuck until new data arrived over
FIFO.

- Make debug output of dlt_daemon_user_send_log_level() more
verbose.

Signed-off-by: Lutz Helwing <lutz_helwing@mentor.com>

3 files changed, 23 insertions, 12 deletions

diff --git a/.gitignore b/.gitignore
index 3e03b2d..4178bd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,6 @@ config.h
 include/dlt/dlt_version.h
 .project
 .cproject
-
-
 .settings
+.idea/
+cmake-build-debug/
diff --git a/src/daemon/dlt-daemon.c b/src/daemon/dlt-daemon.c
index 9288d33..313935d 100644
--- a/src/daemon/dlt-daemon.c
+++ b/src/daemon/dlt-daemon.c
@@ -2423,14 +2423,10 @@ int dlt_daemon_process_user_message_register_context(DltDaemon *daemon,
         /* This call also replaces the default values with the values defined for default */
         if (dlt_daemon_user_send_log_level(daemon, context, verbose)==-1)
         {
-            snprintf(local_str,
-                     DLT_DAEMON_TEXTBUFSIZE,
-                     "Can't send current log level as response to %s for (%.4s;%.4s)\n",
+            dlt_vlog(LOG_WARNING, "Can't send current log level as response to %s for (%.4s;%.4s)\n",
                      __func__,
                      context->apid,
                      context->ctid);
-            dlt_log(LOG_WARNING, local_str);
-            return -1;
         }
     }
 
diff --git a/src/daemon/dlt_daemon_common.c b/src/daemon/dlt_daemon_common.c
index 988bd7b..096708c 100644
--- a/src/daemon/dlt_daemon_common.c
+++ b/src/daemon/dlt_daemon_common.c
@@ -1119,10 +1119,16 @@ int dlt_daemon_user_send_log_level(DltDaemon *daemon, DltDaemonContext *context,
     PRINT_FUNCTION_VERBOSE(verbose);
 
     if ((daemon == NULL) || (context == NULL))
+    {
+        dlt_vlog(LOG_ERR, "NULL parameter in %s", __func__);
         return -1;
+    }
 
     if (dlt_user_set_userheader(&userheader, DLT_USER_MESSAGE_LOG_LEVEL) < DLT_RETURN_OK)
+    {
+        dlt_vlog(LOG_ERR, "Failed to set userheader in %s", __func__);
         return -1;
+    }
 
     if(context->storage_log_level != DLT_LOG_DEFAULT)
     {
@@ -1137,22 +1143,31 @@ int dlt_daemon_user_send_log_level(DltDaemon *daemon, DltDaemonContext *context,
 
     usercontext.log_level_pos = context->log_level_pos;
 
-    snprintf(str,DLT_DAEMON_COMMON_TEXTBUFSIZE, "Send log-level to context: %.4s:%.4s [%i -> %i] [%i -> %i]\n",
-             context->apid, context->ctid, context->log_level, usercontext.log_level, context->trace_status, usercontext.trace_status);
-    dlt_log(LOG_NOTICE, str);
+    dlt_vlog(LOG_NOTICE, "Send log-level to context: %.4s:%.4s [%i -> %i] [%i -> %i]\n",
+             context->apid,
+             context->ctid,
+             context->log_level,
+             usercontext.log_level,
+             context->trace_status,
+             usercontext.trace_status);
 
     /* log to FIFO */
+    errno = 0;
     ret = dlt_user_log_out2(context->user_handle,
                     &(userheader), sizeof(DltUserHeader),
                     &(usercontext), sizeof(DltUserControlMsgLogLevel));
 
     if (ret < DLT_RETURN_OK)
     {
-        if (errno==EPIPE)
+        dlt_vlog(LOG_ERR, "Failed to send data to application in %s: %s",
+                 __func__,
+                 errno != 0 ? strerror(errno) : "Unknown error");
+
+        if (errno == EPIPE)
         {
             /* Close connection */
             close(context->user_handle);
-            context->user_handle=DLT_FD_INIT;
+            context->user_handle = DLT_FD_INIT;
         }
     }