/*
    * Copyright 2017-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.software.os.unix.freebsd;
   
   import static com.sun.jna.platform.unix.LibCAPI.HOST_NAME_MAX;
   
   import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.sun.jna.Native;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.jna.ByRef.CloseablePointerByReference;
  import oshi.jna.platform.unix.CLibrary;
  import oshi.jna.platform.unix.CLibrary.Addrinfo;
  import oshi.jna.platform.unix.FreeBsdLibc;
  import oshi.software.common.AbstractNetworkParams;
  import oshi.util.ExecutingCommand;
  
  /**
   * FreeBsdNetworkParams class.
   */
  @ThreadSafe
  final class FreeBsdNetworkParams extends AbstractNetworkParams {
  
      private static final Logger LOG = LoggerFactory.getLogger(FreeBsdNetworkParams.class);
  
      private static final FreeBsdLibc LIBC = FreeBsdLibc.INSTANCE;
  
      @Override
      public String getDomainName() {
          try (Addrinfo hint = new Addrinfo()) {
              hint.ai_flags = CLibrary.AI_CANONNAME;
              String hostname = getHostName();
  
              try (CloseablePointerByReference ptr = new CloseablePointerByReference()) {
                  int res = LIBC.getaddrinfo(hostname, null, hint, ptr);
                  if (res > 0) {
                      if (LOG.isErrorEnabled()) {
                          LOG.warn("Failed getaddrinfo(): {}", LIBC.gai_strerror(res));
                      }
                      return "";
                  }
                  Addrinfo info = new Addrinfo(ptr.getValue()); // NOSONAR
                  String canonname = info.ai_canonname.trim();
                  LIBC.freeaddrinfo(ptr.getValue());
                  return canonname;
              }
          }
      }
  
      @Override
      public String getHostName() {
          byte[] hostnameBuffer = new byte[HOST_NAME_MAX + 1];
          if (0 != LIBC.gethostname(hostnameBuffer, hostnameBuffer.length)) {
              return super.getHostName();
          }
          return Native.toString(hostnameBuffer);
      }
  
      @Override
      public String getIpv4DefaultGateway() {
          return searchGateway(ExecutingCommand.runNative("route -4 get default"));
      }
  
      @Override
      public String getIpv6DefaultGateway() {
          return searchGateway(ExecutingCommand.runNative("route -6 get default"));
      }
  }