go-i2ptunnel/lib/irc/server/sanitize.go

package ircserver

/** TODO: implement filters from Java I2P using IRC Filter from go-connfilter.
Java filters copied here:

  // Server-side filtering logic
  protected void handleConnection(Socket socket) {
      // Transforms incoming connections
      String dest = socket.getInetAddress().toString();
      // Masks real destination with .i2p
      dest = dest.replace(getRealHost(), getI2PHost());
  }

  // Command filtering
  private String filterLine(String line) {
      // Block administrative commands
      if (line.startsWith("/ADMIN") ||
          line.startsWith("/OPER") ||
          line.startsWith("/DIE") ||
          line.startsWith("/RESTART"))
          return null;

      // Replace real IPs with .i2p addresses
      if (line.contains("@")) {
          line = line.replaceAll("@[^\\s]+", "@" + getI2PHost());
      }

      // Filter WHOIS responses
      if (line.startsWith("311 ")) {
          // Mask user host information
          return maskWhoisResponse(line);
      }

      return line;
  }

  // Host information masking
  private String maskWhoisResponse(String line) {
      // Replace real hostnames with .i2p
      return line.replaceAll("\\s+[^\\s!]+@[^\\s]+", " unknown@" + getI2PHost());
  }

  // DCC command blocking
  private void blockDCC(String line) {
      if (line.toUpperCase().contains("DCC")) {
          // Block all DCC attempts
          throw new SecurityException("DCC not allowed");
      }
  }
*/