ne_status − HTTP status structure
int major_version, minor_version;
int code, klass;
const char *reason_phrase;
An ne_status type represents an HTTP response status; used in response messages giving a result of request. The major_version and minor_version fields give the HTTP version supported by the server issuing the response. The code field gives the status code of the result (lying between 100 and 999 inclusive), and the klass field gives the class  , which is equal to the most significant digit of the status.
There are five classes of HTTP status code defined by RFC2616:
Success: the operation was successful
Client error: the request made was incorrect in some manner.
Joe Orton <firstname.lastname@example.org>
the field is named “klass” not “class” so that the header can be used from a C++ program, in which “class” is a reserved word)