GTPU_ERROR_INDICATION (no ext UDP port)

src/common/utils/conversions.cpp

@@ -184,3 +184,24 @@ void pdn_ip_to_pfcp_ue_ip_address(const oai::cn::core::pdn_type_t& pdn_type,
   }
 }
 
+bool sockaddr_storage_to_gtp_u_peer_address(const struct sockaddr_storage& peer_sockaddr, oai::cn::core::gtp_u_peer_address_t& peer_address)
+{
+  switch (peer_sockaddr.ss_family) {
+    case AF_INET: {
+      const struct sockaddr_in * const sin = reinterpret_cast<const sockaddr_in* const>(&peer_sockaddr);
+      peer_address.ipv4_address.s_addr = sin->sin_addr.s_addr;
+      peer_address.is_v4 = true;
+      return true;
+    }
+    break;
+    case AF_INET6: {
+      const struct sockaddr_in6 * const sin6 = reinterpret_cast<const sockaddr_in6* const>(&peer_sockaddr);
+      peer_address.ipv6_address = sin6->sin6_addr;
+      peer_address.is_v4 = false;
+      return true;
+    }
+    break;
+    default:
+      return false;
+  }
+}

src/common/utils/conversions.hpp

@@ -31,6 +31,7 @@
 #include "3gpp_23.003.h"
 #include "3gpp_24.008.h"
 #include "3gpp_29.274.h"
+#include "3gpp_29.281.h"
 #include "3gpp_29.244.h"
 
 #ifdef __cplusplus
@@ -425,4 +426,6 @@ void pdn_ip_to_pfcp_ue_ip_address(const oai::cn::core::pdn_type_t& pdn_type,
                                   const struct in_addr&  ipv4_address,
                                   const struct in6_addr ipv6_address,
                                   oai::cn::core::pfcp::ue_ip_address_t& ue_ip_address);
+bool sockaddr_storage_to_gtp_u_peer_address(const struct sockaddr_storage& peer_sockaddr, oai::cn::core::gtp_u_peer_address_t& peer_address);
+
 #endif /* FILE_CONVERSIONS_HPP_SEEN */

src/gtpv1u/3gpp_29.281.cpp

@@ -88,3 +88,11 @@ gtpv1u_msg::gtpv1u_msg(const gtpv1u_echo_response& gtp_ies) : gtpv1u_msg_header(
   if (gtp_ies.recovery.first) {std::shared_ptr<gtpv1u_recovery_ie> sie(new gtpv1u_recovery_ie(gtp_ies.recovery.second)); add_ie(sie);}
   if (gtp_ies.private_extension.first) {std::shared_ptr<gtpv1u_private_extension_ie> sie(new gtpv1u_private_extension_ie(gtp_ies.private_extension.second)); add_ie(sie);}
 }
+//------------------------------------------------------------------------------
+gtpv1u_msg::gtpv1u_msg(const gtpv1u_error_indication& gtp_ies) : gtpv1u_msg_header() {
+  ies = {};
+  set_message_type(GTPU_ERROR_INDICATION);
+  if (gtp_ies.tunnel_endpoint_identifier_data_i.first) {std::shared_ptr<gtpv1u_tunnel_endpoint_identifier_data_i_ie> sie(new gtpv1u_tunnel_endpoint_identifier_data_i_ie(gtp_ies.tunnel_endpoint_identifier_data_i.second)); add_ie(sie);}
+  if (gtp_ies.gtp_u_peer_address.first) {std::shared_ptr<gtpv1u_gtp_u_peer_address_ie> sie(new gtpv1u_gtp_u_peer_address_ie(gtp_ies.gtp_u_peer_address.second)); add_ie(sie);}
+  if (gtp_ies.private_extension.first) {std::shared_ptr<gtpv1u_private_extension_ie> sie(new gtpv1u_private_extension_ie(gtp_ies.private_extension.second)); add_ie(sie);}
+}

src/gtpv1u/gtpv1u.cpp

@@ -340,3 +340,33 @@ void gtpu_l4_stack::send_response(const gtpv1u_echo_response& gtp_ies)
       Logger::gtpv1_u().debug( "gtpu_l4_stack::send_response %s, no known peer addr", gtp_ies.get_msg_name());
   }
 }
+//------------------------------------------------------------------------------
+void gtpu_l4_stack::send_indication(const gtpv1u_error_indication& gtp_ies)
+{
+  std::ostringstream oss(std::ostringstream::binary);
+  gtpv1u_msg msg(gtp_ies);
+  uint32_t teid = UNASSIGNED_TEID;
+  if (gtp_ies.get_teid(teid)) {
+    msg.set_teid(teid);
+  }
+  uint16_t sn = 0;
+  if (gtp_ies.get_sequence_number(sn)) {
+    msg.set_sequence_number(sn);
+  }
+  msg.dump_to(oss);
+  std::string bstream = oss.str();
+  switch (gtp_ies.r_endpoint.ss_family) {
+    case AF_INET: {
+      const struct sockaddr_in * const sin = reinterpret_cast<const sockaddr_in* const>(&gtp_ies.r_endpoint);
+      udp_s.async_send_to(reinterpret_cast<const char*>(bstream.c_str()), bstream.length(), *sin);
+    }
+    break;
+    case AF_INET6: {
+      const struct sockaddr_in6 * const sin6 = reinterpret_cast<const sockaddr_in6* const>(&gtp_ies.r_endpoint);
+      udp_s.async_send_to(reinterpret_cast<const char*>(bstream.c_str()), bstream.length(), *sin6);
+    }
+    break;
+    default:
+      Logger::gtpv1_u().debug( "gtpu_l4_stack::send_indication %s, no known peer addr", gtp_ies.get_msg_name());
+  }
+}

src/gtpv1u/gtpv1u.hpp

@@ -171,6 +171,7 @@ public:
   void send_g_pdu(const struct sockaddr_in6& peer_addr, const teid_t teid, const char* payload, const ssize_t payload_len);
 
   void send_response(const gtpv1u_echo_response& gtp_ies);
+  void send_indication(const gtpv1u_error_indication& gtp_ies);
 
 };
 } // namespace gtpv1u

src/spgwu/simpleswitch/spgwu_s1u.cpp

@@ -27,6 +27,7 @@
 */
 
 #include "common_defs.h"
+#include "conversions.hpp"
 #include "gtpu.h"
 #include "itti.hpp"
 #include "logger.hpp"
@@ -65,6 +66,10 @@ void spgwu_s1u_task (void *args_p)
       spgwu_s1u_inst->handle_itti_msg(std::static_pointer_cast<itti_s1u_echo_response>(shared_msg));
       break;
 
+    case S1U_ERROR_INDICATION:
+      spgwu_s1u_inst->handle_itti_msg(std::static_pointer_cast<itti_s1u_error_indication>(shared_msg));
+      break;
+
     case TIME_OUT:
       if (itti_msg_timeout* to = dynamic_cast<itti_msg_timeout*>(msg)) {
         Logger::spgwu_s1u().info( "TIME-OUT event timer id %d", to->timer_id);
@@ -211,4 +216,36 @@ void spgwu_s1u::handle_itti_msg (std::shared_ptr<core::itti::itti_s1u_echo_respo
 {
   send_response(m->gtp_ies);
 }
+//------------------------------------------------------------------------------
+void spgwu_s1u::handle_itti_msg (std::shared_ptr<core::itti::itti_s1u_error_indication> m)
+{
+  send_indication(m->gtp_ies);
+}
+//------------------------------------------------------------------------------
+void spgwu_s1u::report_error_indication(const struct sockaddr_storage& r_endpoint, const socklen_t& r_endpoint_addr_len, const uint32_t tunnel_id)
+{
+  itti_s1u_error_indication *error_ind = new itti_s1u_error_indication(TASK_SPGWU_S1U, TASK_SPGWU_S1U);
+  error_ind->gtp_ies.r_endpoint = r_endpoint;
+  error_ind->gtp_ies.r_endpoint_addr_len = r_endpoint_addr_len;
+  error_ind->gtp_ies.set_teid(0);
+
+  core::tunnel_endpoint_identifier_data_i_t tun_data = {};
+  tun_data.tunnel_endpoint_identifier_data_i = tunnel_id;
+  error_ind->gtp_ies.set(tun_data);
+
+  core::gtp_u_peer_address_t peer_address = {};
+  if (sockaddr_storage_to_gtp_u_peer_address(r_endpoint, peer_address)) {
+    error_ind->gtp_ies.set(peer_address);
+  } else {
+    // mandatory ie
+    free(error_ind);
+    return;
+  }
+
+  std::shared_ptr<itti_s1u_error_indication> serror_ind = std::shared_ptr<itti_s1u_error_indication>(error_ind);
+  int ret = itti_inst->send_msg(serror_ind);
+  if (RETURNok != ret) {
+    Logger::spgwu_s1u().error( "Could not send ITTI message %s to task TASK_SPGWU_S1U", error_ind->get_msg_name());
+  }
+}
 

src/spgwu/simpleswitch/spgwu_s1u.hpp

@@ -54,7 +54,7 @@ public:
 
   //void handle_itti_msg (oai::cn::core::itti::itti_s1u_echo_request& s) {};
   void handle_itti_msg (std::shared_ptr<oai::cn::core::itti::itti_s1u_echo_response> m);
-  //void handle_itti_msg (oai::cn::core::itti::itti_s1u_error_indication& s) {};
+  void handle_itti_msg (std::shared_ptr<oai::cn::core::itti::itti_s1u_error_indication> m);
   //void handle_itti_msg (oai::cn::core::itti::itti_s1u_supported_extension_headers_notification& s) {};
   //void handle_itti_msg (oai::cn::core::itti::itti_s1u_end_marker& s) {};
 
@@ -71,6 +71,7 @@ public:
   void send_g_pdu(const struct in6_addr& peer_addr, const uint16_t peer_udp_port, const uint32_t tunnel_id, const char* send_buffer, const ssize_t num_bytes);
 
   void time_out_itti_event(const uint32_t timer_id);
+  void report_error_indication(const struct sockaddr_storage& r_endpoint, const socklen_t& r_endpoint_addr_len, const uint32_t tunnel_id);
 };
 }
 #endif /* FILE_SGWU_S1U_HPP_SEEN */