wsp.c

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/*
 * wsp.c - Parts of WSP shared between session oriented and connectionless mode
 */


#include <string.h>

#include "gwlib/gwlib.h"
#include "wsp.h"
#include "wsp_pdu.h"
#include "wsp_headers.h"
#include "wsp_strings.h"

/***********************************************************************
 * Public functions
 */


/* Convert HTTP status codes to WSP status codes according
 * to WSP Table 36, Status Code Assignments. */
long wsp_convert_http_status_to_wsp_status(long http_status) {
    long hundreds, singles;

    /*
     * The table is regular, and can be expected to stay regular in
     * future versions of WSP.  The status value is read as XYY,
     * so that X is the first digit and Y is the value of the
     * second two digits.  This is encoded as a hex value 0xAB,
     * where A == X and B == YY.
     * This limits YY to the range 0-15, so an exception is made
     * to allow larger YY values when X is 4.  X value 5 is moved up
     * to A value 6 to allow more room for YY when X is 4.
     */

    hundreds = http_status / 100;
    singles = http_status % 100;

    if ((hundreds == 4 && singles > 31) ||
        (hundreds != 4 && singles > 15) ||
        hundreds < 1 || hundreds > 5)
        goto bad_status;

    if (hundreds > 4)
        hundreds++;

    return hundreds * 16 + singles;

bad_status:
    error(0, "WSP: Unknown status code used internally. Oops.");
    return 0x60; /* Status 500, or "Internal Server Error" */
}