Starting to add code to create the GTP-C messages.

7 years ago · 99f6ffe63b
parent 042cabc8a0
commit 99f6ffe63b
4 changed files with 253 additions and 0 deletions
--- a/lib/include/srslte/asn1/gtpc.h
+++ b/lib/include/srslte/asn1/gtpc.h
@ -0,0 +1,177 @@
+/*ection COPYRIGHT
+ *
+ * Copyright 2013-2017 Software Radio Systems Limited
+ *
+ * \section LICENSE
+ *
+ * This file is part of srsLTE.
+ *
+ * srsUE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsUE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+#include <stdint.h>
+
+#ifdef  GTPC_V2
+#define GTPC_V2
+
+namespace srslte{
+
+/*GTP-C Version*/
+const uint8_t GTPC_V2 = 2;
+
+/****************************************************************
+ *
+ * GTP-C Message Types
+ * Ref: TS 29.274 Table 6.1-1 
+ *
+ ****************************************************************/
+const uint8_t GTPC_MSG_TYPE_RESERVED = 0;
+const uint8_t GTPC_MSG_TYPE_ECHO_REQUEST = 1;
+const uint8_t GTPC_MSG_TYPE_ECHO_RESPONSE = 2;
+const uint8_t GTPC_MSG_TYPE_VERSION_SUPPORT = 3;
+//4-24 Reserved for S101
+//25-31 Reserved for Sv interface
+//SGSN/MME/ePDG to PGW (S4/S11, S5/S8, S2b)
+const uint8_t GTPC_MSG_TYPE_CREATE_SESSION_REQUEST = 32;
+const uint8_t GTPC_MSG_TYPE_CREATE_SESSION_RESPONSE = 33;
+const uint8_t GTPC_MSG_TYPE_DELETE_SESSION_REQUEST = 36;
+const uint8_t GTPC_MSG_TYPE_DELETE_SESSION_RESPONSE = 37;
+//SGSN/MME to PGW (S4/S11, S5/S8)
+const uint8_t GTPC_MSG_TYPE_MODIFY_BEARER_REQUEST = 34;
+const uint8_t GTPC_MSG_TYPE_MODIFY_BEARER_RESPONSE = 35;
+const uint8_t GTPC_MSG_TYPE_CHANGE_NOTIFICATION_REQUEST = 38;
+const uint8_t GTPC_MSG_TYPE_CHANGE_NOTIFICATION_RESPONSE = 39;
+//40 - 63 for future use
+const uint8_t GTPC_MSG_TYPE_RESUME_NOTIFICATION = 164;
+const uint8_t GTPC_MSG_TYPE_RESUME_ACKNOWLEDGE = 165;
+//Messages without explicit response
+const uint8_t GTPC_MSG_TYPE_MODIFY_BEARER_COMMAND = 64;					//(MME/SGSN/ePDG to PGW – S11/S4, S5/S8, S2b)
+const uint8_t GTPC_MSG_TYPE_MODIFY_BEARER_FAILURE_INDICATION = 65;			//(PGW to MME/SGSN/ePDG – S5/S8, S11/S4, S2b)
+const uint8_t GTPC_MSG_TYPE_DELETE_BEARER_COMMAND = 66;					//(MME/SGSN to PGW – S11/S4, S5/S8)
+const uint8_t GTPC_MSG_TYPE_DELETE_BEARER_FAILURE_INDICATION = 67; 			//(PGW to MME/SGSN – S5/S8, S11/S4))
+const uint8_t GTPC_MSG_TYPE_BEARER_RESOURCE_COMMAND = 68;  				//(MME/SGSN to PGW – S11/S4, S5/S8)
+const uint8_t GTPC_MSG_TYPE_BEARER_RESOURCE_FAILURE_INDICATION = 69; 			//(PGW to MME/SGSN – S5/S8, S11/S4)
+const uint8_t GTPC_MSG_TYPE_DOWNLINK_DATA_NOTIFICATION_FAILURE_INDICATION = 70;		//(SGSN/MME to SGW – S4/S11)
+const uint8_t GTPC_MSG_TYPE_TRACE_SESSION_ACTIVATION = 71; 				//(MME/SGSN/ePDG to PGW – S11/S4, S5/S8, S2b)
+const uint8_t GTPC_MSG_TYPE_TRACE_SESSION_DEACTIVATION = 72;				//(MME/SGSN/ePDG to PGW – S11/S4, S5/S8, S2b)
+const uint8_t GTPC_MSG_TYPE_STOP_PAGING_INDICATION = 73;				//(SGW to MME/SGSN – S11/S4)
+//74-94 For future use
+//P-GW to SGSN/MME/ePDG
+const uint8_t GTPC_MSG_TYPE_CREATE_BEARER_REQUEST = 95;
+const uint8_t GTPC_MSG_TYPE_CREATE_BEARER_RESPONSE = 96;
+const uint8_t GTPC_MSG_TYPE_UPDATE_BEARER_REQUEST = 97;
+const uint8_t GTPC_MSG_TYPE_UPDATE_BEARER_RESPONSE = 98;
+const uint8_t GTPC_MSG_TYPE_DELETE_BEARER_REQUEST = 99;
+const uint8_t GTPC_MSG_TYPE_DELETE_BEARER_RESPONSE = 100;
+//PGW to MME, MME to PGW, SGW to PGW, SGW to MME, PGW to ePDG, ePDG to PGW (S5/S8, S11, S2b)
+const uint8_t GTPC_MSG_TYPE_DELETE_PDN_CONNECTION_SET_REQUEST = 101;
+const uint8_t GTPC_MSG_TYPE_DELETE_PDN_CONNECTION_SET_RESPONSE = 102;
+//103-127 For future use
+//MME to MME, SGSN to MME, MME to SGSN, SGSN to SGSN (S3/S10/S16)
+const uint8_t GTPC_MSG_TYPE_IDENTIFICATION_REQUEST = 128;
+const uint8_t GTPC_MSG_TYPE_IDENTIFICATION_RESPONSE = 129;
+const uint8_t GTPC_MSG_TYPE_CONTEXT_REQUEST = 130;
+const uint8_t GTPC_MSG_TYPE_CONTEXT_RESPONSE = 131;
+const uint8_t GTPC_MSG_TYPE_CONTEXT_ACKNOWLEDGE = 132;
+const uint8_t GTPC_MSG_TYPE_FORWARD_RELOCATION_REQUEST = 133;
+const uint8_t GTPC_MSG_TYPE_FORWARD_RELOCATION_RESPONSE = 134;
+const uint8_t GTPC_MSG_TYPE_FORWARD_RELOCATION_COMPLETE_NOTIFICATION = 135;
+const uint8_t GTPC_MSG_TYPE_FORWARD_RELOCATION_COMPLETE_ACKNOWLEDGE = 136;
+const uint8_t GTPC_MSG_TYPE_FORWARD_ACCESS_CONTEXT_NOTIFICATION = 137;
+const uint8_t GTPC_MSG_TYPE_FORWARD_ACCESS_CONTEXT_ACKNOWLEDGE = 138;
+const uint8_t GTPC_MSG_TYPE_RELOCATION_CANCEL_REQUEST = 139;
+const uint8_t GTPC_MSG_TYPE_RELOCATION_CANCEL_RESPONSE = 140;
+const uint8_t GTPC_MSG_TYPE_CONFIGURATION_TRANSFER_TUNNEL = 141;
+//142 - 148 For future use
+const uint8_t GTPC_MSG_TYPE_RAN_INFORMATION_RELAY = 152;
+//SGSN to MME, MME to SGSN (S3)
+const uint8_t GTPC_MSG_TYPE_DETACH_NOTIFICATION = 149;
+const uint8_t GTPC_MSG_TYPE_DETACH_ACKNOWLEDGE = 150;
+const uint8_t GTPC_MSG_TYPE_CS_PAGING_INDICATION = 151;
+const uint8_t GTPC_MSG_TYPE_ALERT_MME_NOTIFICATION = 153;
+const uint8_t GTPC_MSG_TYPE_ALERT_MME_ACKNOWLEDGE = 154;
+const uint8_t GTPC_MSG_TYPE_UE_ACTIVITY_NOTIFICATION = 155;
+const uint8_t GTPC_MSG_TYPE_UE_ACTIVITY_ACKNOWLEDGE = 156;
+//157 - 159 For future use
+//GSN/MME to SGW, SGSN to MME (S4/S11/S3) SGSN to SGSN (S16), SGW to PGW (S5/S8)
+const uint8_t GTPC_MSG_TYPE_SUSPEND_NOTIFICATION = 162;
+const uint8_t GTPC_MSG_TYPE_SUSPEND_ACKNOWLEDGE = 163;
+//SGSN/MME to SGW (S4/S11)
+const uint8_t GTPC_MSG_TYPE_CREATE_FORWARDING_TUNNEL_REQUEST = 160;
+const uint8_t GTPC_MSG_TYPE_CREATE_FORWARDING_TUNNEL_RESPONSE = 161;
+const uint8_t GTPC_MSG_TYPE_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST = 166;
+const uint8_t GTPC_MSG_TYPE_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE = 167;
+const uint8_t GTPC_MSG_TYPE_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_REQUEST = 168;
+const uint8_t GTPC_MSG_TYPE_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE = 169;
+const uint8_t GTPC_MSG_TYPE_RELEASE_ACCESS_BEARERS_REQUEST = 170;
+const uint8_t GTPC_MSG_TYPE_RELEASE_ACCESS_BEARERS_RESPONSE = 171;
+//172 - 175 For future use
+//SGW to SGSN/MME (S4/S11)
+const uint8_t GTPC_MSG_TYPE_DOWNLINK_DATA_NOTIFICATION = 176;
+const uint8_t GTPC_MSG_TYPE_DOWNLINK_DATA_NOTIFICATION_ACKNOWLEDGE = 177;
+const uint8_t GTPC_MSG_TYPE_PGW_RESTART_NOTIFICATION = 179;
+const uint8_t GTPC_MSG_TYPE_PGW_RESTART_NOTIFICATION_ACKNOWLEDGE = 180;
+//SGW to SGSN (S4)
+//178 Reserved. Allocated in earlier version of the specification.
+//181 -189 For future use
+//SGW to PGW, PGW to SGW (S5/S8)
+const uint8_t GTPC_MSG_TYPE_UPDATE_PDN_CONNECTION_SET_REQUEST = 200;
+const uint8_t GTPC_MSG_TYPE_UPDATE_PDN_CONNECTION_SET_RESPONSE = 201;
+//For future use
+//MME to SGW (S11)
+const uint8_t GTPC_MSG_TYPE_MODIFY_ACCESS_BEARERS_REQUEST = 211;
+const uint8_t GTPC_MSG_TYPE_MODIFY_ACCESS_BEARERS_RESPONSE = 212;
+//For future use
+//MBMS GW to MME/SGSN (Sm/Sn)
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_START_REQUEST = 231;
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_START_RESPONSE = 232;
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_UPDATE_REQUEST = 233;
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_UPDATE_RESPONSE = 234;
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_STOP_REQUEST = 235;
+const uint8_t GTPC_MSG_TYPE_MBMS_SESSION_STOP_RESPONSE = 236;
+//For future use
+//Other
+//240 - 255 For future use
+
+/****************************************************************************
+ * GTP-C v2 Header
+ * Ref: 3GPP TS 29.274 v10.14.0 Section 5
+ *
+ *        | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
+ *
+ * 1      |  Version  | P | T | S | S | S |
+ * 2      |           Message Type        |
+ * 3      |         Length (1st Octet)    |
+ * 4      |         Length (2nd Octet)    |
+ * m      |   If T=1, TEID (1st Octet)    |
+ * m+1    |   If T=1, TEID (2nd Octet)    |
+ * m+2    |   If T=1, TEID (3st Octet)    |
+ * m+3    |   If T=1, TEID (4st Octet)    |
+ * n      |           Sequence            |
+ * n+1    |           Sequence            |
+ * n+2    |           Sequence            |
+ * n+3    |            Spare              |
+ ***************************************************************************/
+typedef struct gtpc_header
+{
+  uint8_t version;
+  bool piggyback;
+  bool tied_present;
+  enum gtpc_msg_type msg_type;
+  uint64_t teid;
+  uint64_t sequence;
+} gtpc_header_t;
+
+};
--- a/lib/src/asn1/CMakeLists.txt
+++ b/lib/src/asn1/CMakeLists.txt
@ -24,5 +24,6 @@ add_library(srslte_asn1 STATIC
  liblte_rrc.cc
  liblte_mme.cc
  liblte_s1ap.cc
+  gtpc.cc
 )
 install(TARGETS srslte_asn1 DESTINATION ${LIBRARY_DIR})
--- a/lib/src/asn1/gtpc.cc
+++ b/lib/src/asn1/gtpc.cc
@ -0,0 +1,73 @@
+/**
+ *
+ * \section COPYRIGHT
+ *
+ * Copyright 2013-2017 Software Radio Systems Limited
+ *
+ * \section LICENSE
+ *
+ * This file is part of srsLTE.
+ *
+ * srsUE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsUE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+#include <stdint.h>
+
+namespace srslte{
+
+
+enum gtpc_version
+{
+  GTPC_V1 = 1,
+  GTPC_V2
+};
+
+enum gtpc_msg_type
+{
+  RESERVED = 0,
+  ECHO_REQUEST = 1
+};
+
+/****************************************************************************
+ * GTP-C Header
+ * Ref: 3GPP TS 29.274 v10.14.0 Section 5
+ *
+ *        | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
+ *
+ * 1      |  Version  | P | T | S | S | S |
+ * 2      |           Message Type        |
+ * 3      |         Length (1st Octet)    |
+ * 4      |         Length (2nd Octet)    |
+ * m      |   If T=1, TEID (1st Octet)    |
+ * m+1    |   If T=1, TEID (2nd Octet)    |
+ * m+2    |   If T=1, TEID (3st Octet)    |
+ * m+3    |   If T=1, TEID (4st Octet)    |
+ * n      |           Sequence            |
+ * n+1    |           Sequence            |
+ * n+2    |           Sequence            |
+ * n+3    |            Spare              |
+ ***************************************************************************/
+
+typedef struct gtpc_header
+{
+  enum gtpc_version version;
+  bool piggyback;
+  bool tied_present;
+  enum gtpc_msg_type msg_type;
+  uint64_t teid;
+  uint64_t sequence;
+} gtpc_header_t;
+
+};
--- a/srsepc/src/mme/s1ap.cc
+++ b/srsepc/src/mme/s1ap.cc
@ -482,6 +482,8 @@ s1ap::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, srslte:
    m_s1ap_log->info("UE Authentication Accepted. IMSI: %lu\n", ue_ctx->imsi);
    //Send Security Mode Command
    m_s1ap_nas_transport.pack_security_mode_command(reply_msg, ue_ctx);
+
+    //m_gtpc->send_create_session_request(ue_ctx->imsi);
  }
  return true;
 }