C++ SockAddr::IsValid方法代码示例

  static int bfddMain(int argc, char *argv[])
  {
    int argIndex;
    SockAddr connectAddr;
    const char *valueString;

    //gLog.LogToFile("/tmp/bfd.log");
    UtilsInit();
    gLog.LogToSyslog("bfdd-control", false);
    gLog.Optional(Log::App, "Startup %x", getpid());

    //Parse command line options
    for (argIndex = 1; argIndex < argc; argIndex++)
    {
      if (0 == strcmp("--altport", argv[argIndex]))
      {
        if (connectAddr.IsValid())
        {
          fprintf(stderr, "Only a single --altport or --control option is allowed.\n");
          exit(1);
        }
        // Backwards compatability only ... use --control
        connectAddr.FromString("127.0.0.1", ALT_PORTNUM);
      }
      else if (CheckArg("--control", argv[argIndex], &valueString))
      {
        if (!valueString || *valueString == '\0')
        {
          fprintf(stderr, "--control must be followed by an '=' and a ip address with a port.\n");
          exit(1);
        }

        if (!connectAddr.FromString(valueString))
        {
          fprintf(stderr, "--control address <%s> is not an IPv4 or IPv6 address.\n", valueString);
          exit(1);
        }

        if (!connectAddr.HasPort())
        {
          fprintf(stderr, "--control address must have a port specified. The address <%s> does not conatin a port.\n", valueString);
          exit(1);
        }
      }
      else if (0 == strncmp("--", argv[argIndex], 2))
      {
        fprintf(stderr, "Unrecognized %s command line option %s.\n", ControlAppName, argv[argIndex]);
        exit(1);
      }
      else
        break;
    }

    if (argIndex >=  argc)
    {
      fprintf(stderr, "No command. Try \"man %s\" for a list of commands.\n", ControlAppName);
      exit(1);
    }

    // "version" is special because we tell first. Than lest the beacon handle it.
    if (0 == strcmp(argv[argIndex], "version"))
    {
      fprintf(stdout, "%s v%s\n", ControlAppName, SofwareVesrion);
    }

    if (!connectAddr.IsValid())
      connectAddr.FromString("127.0.0.1", PORTNUM);


    // "load" is special because we send a series of commands..
    if (0 == strcmp(argv[argIndex], "load"))
    {
      argIndex++;

      if (argIndex >=  argc)
      {
        fprintf(stderr, "Must supply a script file after 'load'\n");
        exit(1);
      }

      fprintf(stdout,  "Running script from file <%s>\n", argv[argIndex]);
      if (!doLoadScript(argv[argIndex], connectAddr))
      {
        fprintf(stderr, "Script load failed.\n");
        exit(1);
      }
      fprintf(stdout,  "Completed script from file <%s>\n", argv[argIndex]);
      exit(0);
    }

    // To allow for quotes, we concatenate all the arguments, separating them with
    // "NULL".
    vector<char> buffer;

    buffer.reserve(MaxCommandSize);

    for (; argIndex < argc; argIndex++)
    {
      AddParamToBuffer(buffer, argv[argIndex]);
    }
//.........这里部分代码省略.........

  void Beacon::handleListenSocket(Socket &socket)
  {
    SockAddr sourceAddr;
    IpAddr destIpAddr, sourceIpAddr;
    uint8_t ttl;
    BfdPacket packet;
    bool found;
    Session *session = NULL;

    if (!m_packet.DoRecvMsg(socket))
    {
      gLog.ErrnoError(m_packet.GetLastError(), "Error receiving on BFD listen socket");
      return;
    }

    sourceAddr = m_packet.GetSrcAddress();
    if (!LogVerify(sourceAddr.IsValid()))
      return;
    sourceIpAddr = IpAddr(sourceAddr);

    destIpAddr = m_packet.GetDestAddress();
    if (!destIpAddr.IsValid())
    {
      gLog.LogError("Could not get destination address for packet from %s.", sourceAddr.ToString());
      return;
    }

    ttl = m_packet.GetTTLorHops(&found);
    if (!found)
    {
      gLog.LogError("Could not get ttl for packet from %s.", sourceAddr.ToString());
      return;
    }

    LogOptional(Log::Packet, "Received bfd packet %zu bytes from %s to %s", m_packet.GetDataSize(), sourceAddr.ToString(), destIpAddr.ToString());

    //
    // Check ip specific stuff. See draft-ietf-bfd-v4v6-1hop-11.txt
    //

    // Port
    if (m_strictPorts)
    {
      if (sourceAddr.Port() < bfd::MinSourcePort) // max port is max value, so no need to check
      {
        LogOptional(Log::Discard, "Discard packet: bad source port %s to %s", sourceAddr.ToString(), destIpAddr.ToString());
        return;
      }
    }

    // TTL assumes that all control packets are from neighbors.
    if (ttl != 255)
    {
      gLog.Optional(Log::Discard, "Discard packet: bad ttl/hops %hhu", ttl);
      return;
    }

    if (!Session::InitialProcessControlPacket(m_packet.GetData(), m_packet.GetDataSize(), packet))
    {
      gLog.Optional(Log::Discard, "Discard packet");
      return;
    }

    // We have a (partially) valid packet ... now find the correct session.
    if (packet.header.yourDisc != 0)
    {
      DiscMapIt found = m_discMap.find(packet.header.yourDisc);
      if (found == m_discMap.end())
      {
        if (gLog.LogTypeEnabled(Log::DiscardDetail))
          Session::LogPacketContents(packet, false, true, sourceAddr, destIpAddr);

        gLog.Optional(Log::Discard, "Discard packet: no session found for yourDisc <%u>.", packet.header.yourDisc);
        return;
      }
      session = found->second;
      if (session->GetRemoteAddress() != sourceIpAddr)
      {
        if (gLog.LogTypeEnabled(Log::DiscardDetail))
          Session::LogPacketContents(packet, false, true, sourceAddr, destIpAddr);

        LogOptional(Log::Discard, "Discard packet: mismatched yourDisc <%u> and ip <from %s to %s>.", packet.header.yourDisc, sourceAddr.ToString(), destIpAddr.ToString());
        return;
      }
    }
    else
    {
      // No discriminator
      session = findInSourceMap(sourceIpAddr, destIpAddr);
      if (NULL == session)
      {
        // No session yet .. create one !?
        if (!m_allowAnyPassiveIP && m_allowedPassiveIP.find(sourceIpAddr) == m_allowedPassiveIP.end())
        {
          if (gLog.LogTypeEnabled(Log::DiscardDetail))
            Session::LogPacketContents(packet, false, true, sourceAddr, destIpAddr);

          LogOptional(Log::Discard, "Ignoring unauthorized bfd packets from %s",  sourceAddr.ToString());
          return;
        }
//.........这里部分代码省略.........