static int process_request(char *input, size_t len) {
        char buffer[256];
        int result;

        if (input == NULL || len == 0) {
          return -1;
        }

        memset(buffer, 0, sizeof(buffer));
        memcpy(buffer, input, len);
        buffer[len] = '\0';

        result = parse_command(buffer);

        if (result < 0) {
            log_error("invalid request");
        }

        return result;
      }