+
+std::string OI2String(OBJECT_IDENTIFIER_t * oi)
+{
+std::string res;
+
+int arcs[1024];
+int count = OBJECT_IDENTIFIER_get_arcs(oi, arcs, sizeof(arcs[0]), 1024);
+
+if (count > 1024)
+    return "";
+
+for (int i = 0; i < count; ++i)
+    {
+    res += ".";
+    std::string arc;
+    strprintf(&arc, "%d", arcs[i]);
+    res += arc;
+    }
+
+return res;
+}
+
+int SendGetResponsePDU(int fd, GetResponse_PDU_t * getResponse)
+{
+asn_enc_rval_t error;
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_GetResponse_PDU, getResponse, buffer,
+                             sizeof(buffer));
+
+if (error.encoded == -1)
+    {
+    printfd(__FILE__, "Could not encode GetResponsePDU (at %s)\n",
+            error.failed_type ? error.failed_type->name : "unknown");
+    return -1;
+    }
+else
+    {
+    write(fd, buffer, error.encoded);
+    printfd(__FILE__, "GetResponsePDU encoded successfully to %d bytes\n",
+            error.encoded);
+    }
+return 0;
+}
+
+int SendGetResponseErrorPDU(int fd,
+                            const PDU_t * getRequest,
+                            int errorStatus,
+                            int errorIndex)
+{
+asn_enc_rval_t error;
+GetResponse_PDU_t msg;
+
+memset(&msg, 0, sizeof(msg));
+
+msg.request_id = getRequest->request_id;
+asn_long2INTEGER(&msg.error_status, errorStatus);
+asn_long2INTEGER(&msg.error_index, errorIndex);
+
+char buffer[1024];
+error = der_encode_to_buffer(&asn_DEF_GetResponse_PDU, &msg, buffer,
+                             sizeof(buffer));
+
+if (error.encoded == -1)
+    {
+    printfd(__FILE__, "Could not encode GetResponsePDU for error (at %s)\n",
+            error.failed_type ? error.failed_type->name : "unknown");
+    return -1;
+    }
+else
+    {
+    write(fd, buffer, error.encoded);
+    printfd(__FILE__,
+            "GetResponsePDU for error encoded successfully to %d bytes\n",
+            error.encoded);
+    }
+return 0;
+}