diff --git a/include/common/s11_structs.h b/include/common/s11_structs.h
new file mode 100644
index 0000000..c4ad8f9
--- /dev/null
+++ b/include/common/s11_structs.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2003-2018, Great Software Laboratory Pvt. Ltd.
+ * Copyright (c) 2017 Intel Corporation
+ * Copyright (c) 2019, Infosys Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __S11_STRUCTS_H_
+#define __S11_STRUCTS_H_
+
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#pragma pack(1)
+typedef struct gtpv2c_header {
+	struct gtpc{
+		unsigned char spare :3;
+		unsigned char teidFlg :1;
+		unsigned char piggyback :1;
+		unsigned char version :3;
+		unsigned char message_type;
+		unsigned short len;
+	}gtp;
+	union teid {
+		struct has_teid_t {
+			unsigned int teid;
+			unsigned int seq :24;
+			unsigned int spare :8;
+		} has_teid;
+		struct no_teid_t {
+			unsigned int seq :24;
+			unsigned int spare :8;
+		} no_teid;
+	} teid;
+} gtpv2c_header;
+
+typedef struct fteid {
+        struct fteid_header {
+                unsigned char iface_type :6;
+                unsigned char v6 :1;
+                unsigned char v4 :1;
+                unsigned int teid_gre;
+        } header;
+        union ftied_ip {
+                struct in_addr ipv4;
+                struct in6_addr ipv6;
+                struct ipv4v6_t {
+                        struct in_addr ipv4;
+                        struct in6_addr ipv6;
+                } ipv4v6;
+        } ip;
+} fteid_t;
+
+struct PAA {
+	uint8_t pdn_type;
+        union ip_type {
+                struct in_addr ipv4;
+                struct ipv6_t {
+                        uint8_t prefix_length;
+                        struct in6_addr ipv6;
+                } ipv6;
+                struct paa_ipv4v6_t {
+                        uint8_t prefix_length;
+                        struct in6_addr ipv6;
+                        struct in_addr ipv4;
+                } paa_ipv4v6;
+        } ip_type;
+};
+
+struct gtp_cause {
+	unsigned char cause;
+	unsigned char data;
+};
+
+struct bearer_ctx {
+	unsigned char eps_bearer_id;
+	struct gtp_cause cause;
+	struct fteid s1u_sgw_teid;
+	struct fteid s5s8_pgw_u_teid;
+};
+
+struct ARP {
+        uint8_t prioLevel :4;
+        uint8_t preEmptionCapab :1;
+        uint8_t preEmptionVulnebility :1;
+        uint8_t spare :2;
+};
+
+
+struct s11_IE_header {
+	unsigned char ie_type;
+	unsigned short ie_len;
+	unsigned char cr_flag:4;
+	unsigned char instance:4;
+};
+
+union s11_IE_data {
+	struct gtp_cause cause;
+	struct fteid s11_sgw_fteid;
+	struct fteid s5s8_pgw_c_fteid;
+	struct PAA pdn_addr;
+	struct bearer_ctx bearer;
+};
+
+struct s11_IE {
+	struct s11_IE_header header;
+	union s11_IE_data data;
+};
+
+struct s11_proto_IE {
+	unsigned short message_type;
+	unsigned short no_of_ies;
+	struct s11_IE *s11_ies;
+};
+
+#pragma pack()
+
+#endif /* S11_STRUCTS_H */