implement pdusession establishment request

2020-11-12 03:06:10 +00:00
parent 04897ab64f
commit d1a055ff70
8 changed files with 378 additions and 1 deletions
@@ -0,0 +1,129 @@
+/*! \file FGSUplinkNasTransport.c
+
+\brief uplink nas transport procedures
+\author Yoshio INOUE, Masayuki HARADA
+\email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com
+\date 2020
+\version 0.1
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <arpa/inet.h>
+
+#include "FGSUplinkNasTransport.h"
+#include "TLVEncoder.h"
+
+int encode_fgs_payload_container(FGSPayloadContainer *paycontainer, uint8_t iei, uint8_t *buffer, uint32_t len)
+{
+  uint32_t encoded = 0;
+  int encode_result;
+
+  if (iei > 0) {
+    *buffer = iei;
+    encoded++;
+  }
+
+  encoded += 2;
+
+  if ((encode_result = encode_octet_string(&paycontainer->payloadcontainercontents, buffer + encoded, len - encoded)) < 0) {
+    return encode_result;
+  } else {
+    encoded += encode_result;
+  }
+  if(iei > 0){
+    *(uint16_t*) (buffer+1) = htons(encoded - 3);
+  } else {
+    *(uint16_t*) (buffer) = htons(encoded - 2);
+  }
+
+  return encoded;
+}
+
+int encode_nssai(OctetString *nssai, uint8_t iei, uint8_t *buffer)
+{
+  uint32_t encoded = 0;
+  int encode_result;
+
+  if (iei > 0) {
+    *buffer = iei;
+    encoded++;
+  }
+
+  *(buffer + encoded) = nssai->length;
+  encoded++;
+
+
+  if ((encode_result = encode_octet_string(nssai, buffer + encoded, nssai->length)) < 0) {
+    return encode_result;
+  } else {
+    encoded += encode_result;
+  }
+
+  return encoded;
+}
+
+int encode_dnn(OctetString *dnn, uint8_t iei, uint8_t *buffer)
+{
+  uint32_t encoded = 0;
+  int encode_result;
+
+  if (iei > 0) {
+    *buffer = iei;
+    encoded++;
+  }
+
+  *(buffer + encoded) = dnn->length;
+  encoded++;
+
+  if ((encode_result = encode_octet_string(dnn, buffer + encoded, dnn->length)) < 0) {
+    return encode_result;
+  } else {
+    encoded += encode_result;
+  }
+
+  return encoded;
+}
+
+int encode_fgs_uplink_nas_transport(fgs_uplink_nas_transport_msg *fgs_up_nas_transport, uint8_t *buffer, uint32_t len)
+{
+    int encoded = 0;
+    int encode_result = 0;
+
+    *(buffer + encoded) = (fgs_up_nas_transport->payloadcontainertype.iei << 4) | (fgs_up_nas_transport->payloadcontainertype.type &0xf);
+    encoded++;
+
+    if ((encode_result = encode_fgs_payload_container(&fgs_up_nas_transport->fgspayloadcontainer,
+                                                       0, buffer +encoded, len - encoded)) < 0) {
+      return encode_result;
+    } else {
+      encoded += encode_result;
+    }
+
+    *(buffer + encoded) = 0x12;
+    encoded++;
+
+    IES_ENCODE_U8(buffer, encoded, fgs_up_nas_transport->pdusessionid);
+
+    // set request type
+    *(buffer + encoded) = (0x8<<4)|(fgs_up_nas_transport->requesttype &0x7);
+    encoded++;
+
+    if ((encode_result = encode_nssai(&fgs_up_nas_transport->snssai, 0x22, buffer +encoded)) < 0) {
+      return encode_result;
+    } else {
+      encoded += encode_result;
+    }
+
+    if ((encode_result = encode_dnn(&fgs_up_nas_transport->dnn, 0x25, buffer +encoded)) < 0) {
+      return encode_result;
+    } else {
+      encoded += encode_result;
+    }
+
+    return encoded;
+}
+
+
@@ -0,0 +1,56 @@
+/*! \file FGSUplinkNasTransport.h
+
+\brief uplink nas transport procedures
+\author Yoshio INOUE, Masayuki HARADA
+\email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com
+\date 2020
+\version 0.1
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "ExtendedProtocolDiscriminator.h"
+#include "SecurityHeaderType.h"
+#include "SpareHalfOctet.h"
+#include "MessageType.h"
+
+#ifndef FGS_UPLINK_NAS_TRANSPORT_H_
+#define FGS_UPLINK_NAS_TRANSPORT_H_
+
+/*
+ * Message name: uplink nas transpaort
+ * Description: The UL NAS TRANSPORT message transports message payload and associated information to the AMF. See table 8.2.10.1.1.
+ * Significance: dual
+ * Direction: UE to network
+ */
+
+typedef struct PayloadContainerType_tag{
+    uint8_t  iei:4;
+    uint8_t  type:4;
+}PayloadContainerType;
+typedef struct FGSPayloadContainer_tag {
+  OctetString payloadcontainercontents;
+} FGSPayloadContainer;
+
+typedef struct fgs_uplink_nas_transport_msg_tag {
+    /* Mandatory fields */
+    ExtendedProtocolDiscriminator           protocoldiscriminator;
+    SecurityHeaderType                      securityheadertype:4;
+    SpareHalfOctet                          sparehalfoctet:4;
+    MessageType                             messagetype;
+    PayloadContainerType                    payloadcontainertype;
+    FGSPayloadContainer                     fgspayloadcontainer;
+    /* Optional fields */
+    uint16_t                                pdusessionid;
+    uint8_t                                 requesttype;
+    OctetString                             snssai;
+    OctetString                             dnn;
+} fgs_uplink_nas_transport_msg;
+
+int encode_fgs_uplink_nas_transport(fgs_uplink_nas_transport_msg *fgs_security_mode_comp, uint8_t *buffer, uint32_t len);
+
+#endif /* ! defined(FGS_UPLINK_NAS_TRANSPORT_H_) */
+
+