1 files changed, 41 insertions, 0 deletions
diff --git a/security/nss/lib/ssl/sslerr.c b/security/nss/lib/ssl/sslerr.c
new file mode 100644
index 0000000000..edb941257d
--- /dev/null
+++ b/security/nss/lib/ssl/sslerr.c
@@ -0,0 +1,41 @@
+/*
+ * Function to set error code only when meaningful error has not already
+ * been set.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prerror.h"
+#include "secerr.h"
+#include "sslerr.h"
+#include "seccomon.h"
+
+/* look at the current value of PR_GetError, and evaluate it to see
+ * if it is meaningful or meaningless (out of context).
+ * If it is meaningless, replace it with the hiLevelError.
+ * Returns the chosen error value.
+ */
+int
+ssl_MapLowLevelError(int hiLevelError)
+{
+    int oldErr = PORT_GetError();
+
+    switch (oldErr) {
+
+        case 0:
+        case PR_IO_ERROR:
+        case SEC_ERROR_IO:
+        case SEC_ERROR_BAD_DATA:
+        case SEC_ERROR_LIBRARY_FAILURE:
+        case SEC_ERROR_EXTENSION_NOT_FOUND:
+        case SSL_ERROR_BAD_CLIENT:
+        case SSL_ERROR_BAD_SERVER:
+        case SSL_ERROR_SESSION_NOT_FOUND:
+            PORT_SetError(hiLevelError);
+            return hiLevelError;
+
+        default: /* leave the majority of error codes alone. */
+            return oldErr;
+    }
+}