Starting to add a structure for the packet filters.

srsue/hdr/stack/upper/gw.h

@@ -30,6 +30,7 @@
 #include "srslte/interfaces/ue_interfaces.h"
 #include "srslte/common/threads.h"
 #include "gw_metrics.h"
+#include "tft_packet_filter.h"
 
 namespace srsue {
 

srsue/hdr/stack/upper/tft_packet_filter.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2013-2019 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE 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.
+ *
+ * srsLTE 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/.
+ *
+ */
+
+#ifndef SRSUE_PACKET_FILTER_H
+#define SRSUE_PACKET_FILTER_H
+
+#include "srslte/asn1/liblte_mme.h"
+
+namespace srsue {
+
+const uint16_t IPV4_REMOTE_ADDR_FLAG         = 1;
+const uint16_t IPV4_LOCAL_ADDR_FLAG          = 1 << 1;
+const uint16_t IPV6_REMOTE_ADDR_FLAG         = 1 << 2;
+const uint16_t IPV6_REMOTE_ADDR_LENGTH_FLAG  = 1 << 3;
+const uint16_t IPV6_LOCAL_ADDR_LENGTH_FLAG   = 1 << 4;
+const uint16_t PROTOCOL_ID_FLAG              = 1 << 5;
+const uint16_t SINGLE_LOCAL_PORT_FLAG        = 1 << 6;
+const uint16_t LOCAL_PORT_RANGE_FLAG         = 1 << 7;
+const uint16_t SINGLE_REMOTE_PORT_FLAG       = 1 << 8;
+const uint16_t REMOTE_PORT_RANGE_FLAG        = 1 << 9;
+const uint16_t SECURITY_PARAMETER_INDEX_FLAG = 1 << 10;
+const uint16_t TYPE_OF_SERVICE_FLAG          = 1 << 11;
+const uint16_t FLOW_LABEL_FLAG               = 1 << 12;
+
+const uint8_t IPV4_REMOTE_ADDR_TYPE         = 0b00010000;
+const uint8_t IPV4_LOCAL_ADDR_TYPE          = 0b00010001;
+const uint8_t IPV6_REMOTE_ADDR_TYPE         = 0b00100000;
+const uint8_t IPV6_REMOTE_ADDR_LENGTH_TYPE  = 0b00100001;
+const uint8_t IPV6_LOCAL_ADDR_LENGTH_TYPE   = 0b00100011;
+const uint8_t PROTOCOL_ID_TYPE              = 0b00110000;
+const uint8_t SINGLE_LOCAL_PORT_TYPE        = 0b01000000;
+const uint8_t LOCAL_PORT_RANGE_TYPE         = 0b01000001;
+const uint8_t SINGLE_REMOTE_PORT_TYPE       = 0b01010000;
+const uint8_t REMOTE_PORT_RANGE_TYPE        = 0b01010001;
+const uint8_t SECURITY_PARAMETER_INDEX_TYPE = 0b01100000;
+const uint8_t TYPE_OF_SERVICE_TYPE          = 0b01110000;
+const uint8_t FLOW_LABEL_TYPE               = 0b10000000;
+
+// TS 24.008 Table 10.5.162
+struct tft_packet_filter_t {
+  uint8_t  id;
+  uint8_t  eval_precedence;
+  uint16_t active_filters;
+  uint32_t ipv4_remote_addr;
+  uint32_t ipv4_local_addr;
+  uint8_t  ipv6_remote_addr[16];
+  uint8_t  ipv6_remote_addr_length;
+  uint8_t  ipv6_local_addr_length;
+  uint8_t  protocol_id;
+  uint16_t single_local_port;
+  uint16_t local_port_range[2];
+  uint16_t single_remote_port;
+  uint16_t remote_port_range[2];
+  uint32_t security_parameter_index;
+  uint32_t type_of_service;
+  uint32_t flow_label;
+
+  tft_packet_filter_t(const LIBLTE_MME_PACKET_FILTER_STRUCT* tft);
+};
+
+
+} // namespace srsue
+
+#endif // SRSUE_GW_METRICS_H

srsue/src/stack/upper/tft_packet_filter.cc

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2013-2019 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE 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.
+ *
+ * srsLTE 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 "srsue/hdr/stack/upper/tft_packet_filter.h"
+
+namespace srsue {
+
+tft_packet_filter_t::tft_packet_filter_t(const LIBLTE_MME_PACKET_FILTER_STRUCT* tft) :
+  id(tft->id),
+  eval_precedence(tft->eval_precedence),
+  active_filters(0)
+{
+  int idx = 0;
+  while (idx < tft->filter_size) {
+    switch (tft->filter[idx] & 0x0F) {
+      case IPV4_REMOTE_ADDR_TYPE:
+        active_filters = IPV4_REMOTE_ADDR_FLAG;
+        memcpy(&ipv4_remote_addr, &tft->filter[idx], 4);
+        idx += 4;
+        break;
+      case IPV4_LOCAL_ADDR_TYPE:
+        active_filters = IPV4_LOCAL_ADDR_FLAG;
+        memcpy(&ipv4_local_addr, &tft->filter[idx], 4);
+        idx += 4;
+        break;
+      case IPV6_REMOTE_ADDR_TYPE:
+        active_filters = IPV6_REMOTE_ADDR_FLAG;
+        memcpy(&ipv4_local_addr, &tft->filter[idx], 16);
+        idx += 16;
+        break;
+      case IPV6_REMOTE_ADDR_LENGTH_TYPE:
+        break;
+      case IPV6_LOCAL_ADDR_LENGTH_TYPE:
+        break;
+      case PROTOCOL_ID_TYPE:
+        break;
+      case SINGLE_LOCAL_PORT_TYPE:
+        active_filters = SINGLE_LOCAL_PORT_FLAG;
+        memcpy(&single_local_port, &tft->filter[idx], 2);
+        idx += 2;
+        break;
+      case LOCAL_PORT_RANGE_TYPE:
+        break;
+      case SINGLE_REMOTE_PORT_TYPE:
+        break;
+      case REMOTE_PORT_RANGE_TYPE:
+        break;
+      case SECURITY_PARAMETER_INDEX_TYPE:
+        break;
+      case TYPE_OF_SERVICE_TYPE:
+        break;
+      case FLOW_LABEL_TYPE:
+        break;
+      default:
+        return;
+    }
+  }
+}
+
+tft_packet_filter_t::~tft_packet_filter_t() {}
+
+} // namespace srsue