diff --git a/p4src/parsers.p4 b/p4src/parsers.p4
new file mode 100644
index 0000000..8be8c5c
--- /dev/null
+++ b/p4src/parsers.p4
@@ -0,0 +1,72 @@
+/* -*- P4_16 -*- */
+#ifndef PARSERS_P4
+#define PARSERS_P4
+
+#include <core.p4>
+#include <v1model.p4>
+
+#include "headers.p4"
+
+parser MyParser(packet_in packet,
+                out       headers hdr,
+                inout     metadata meta,
+                inout     standard_metadata_t standard_metadata) {
+
+    state start {
+        packet.extract(hdr.ethernet);
+        transition select(hdr.ethernet.ethertype){
+            TYPE_IPV4: ipv4;
+            TYPE_IPV6: ipv6;
+            default: accept;
+        }
+    }
+
+    state ipv4 {
+        packet.extract(hdr.ipv4);
+		meta.tcpLength = hdr.ipv4.totalLen - 16w20;
+
+        transition select(hdr.ipv4.protocol){
+            TYPE_TCP: tcp;
+            default: accept;
+        }
+    }
+
+    state ipv6 {
+        packet.extract(hdr.ipv6);
+		meta.tcpLength = hdr.ipv6.payload_length;
+
+        transition select(hdr.ipv6.next_header){
+            TYPE_TCP: tcp;
+            default: accept;
+        }
+    }
+
+    state tcp {
+       packet.extract(hdr.tcp);
+       transition accept;
+    }
+
+}
+
+/*************************************************************************
+************************  D E P A R S E R  *******************************
+*************************************************************************/
+
+control MyDeparser(packet_out packet, in headers hdr) {
+    apply {
+        packet.emit(hdr.ethernet);
+
+        /* either */
+        packet.emit(hdr.ipv4);
+        packet.emit(hdr.ipv6);
+
+        /* either */
+        packet.emit(hdr.tcp);
+//        packet.emit(hdr.udp);
+//        packet.emit(hdr.icmp);
+//        packet.emit(hdr.icmpv6);
+    }
+}
+
+
+#endif