mib.c

snmp up 2

                !(allow_realloc && snmp_realloc(buf, buf_len))) {
                return 0;
            }
            *(*buf + (*out_len)++) = '.';
            cp++;
        }
    }
    if ((*out_len >= *buf_len) &&
        !(allow_realloc && snmp_realloc(buf, buf_len))) {
        return 0;
    }
    *(*buf + *out_len) = '\0';
    return 1;
}

/**
 * Prints an octet string into a buffer.
 *
 * The variable var is encoded as octet string.
 * 
 * If allow_realloc is true the buffer will be (re)allocated to fit in the 
 * needed size. (Note: *buf may change due to this.)
 * 
 * @param buf      Address of the buffer to print to.
 * @param buf_len  Address to an integer containing the size of buf.
 * @param out_len  Incremented by the number of characters printed.
 * @param allow_realloc if not zero reallocate the buffer to fit the 
 *                      needed size.
 * @param var      The variable to encode.
 * @param enums    The enumeration ff this variable is enumerated. may be NULL.
 * @param hint     Contents of the DISPLAY-HINT clause of the MIB.
 *                 See RFC 1903 Section 3.1 for details. may be NULL.
 * @param units    Contents of the UNITS clause of the MIB. may be NULL.
 * 
 * @return 1 on success, or 0 on failure (out of memory, or buffer to
 *         small when not allowed to realloc.)
 */
int
sprint_realloc_octet_string(u_char ** buf, size_t * buf_len,
                            size_t * out_len, int allow_realloc,
                            netsnmp_variable_list * var,
                            struct enum_list *enums, const char *hint,
                            const char *units)
{
    size_t          saved_out_len = *out_len;
    const char     *saved_hint = hint;
    int             hex = 0, x = 0;
    u_char         *cp;
    int             output_format;

    if ((var->type != ASN_OCTET_STR) && 
        (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
        const char      str[] = "Wrong Type (should be OCTET STRING): ";
        if (snmp_strcat
            (buf, buf_len, out_len, allow_realloc, (const u_char *) str)) {
            return sprint_realloc_by_type(buf, buf_len, out_len,
                                          allow_realloc, var, NULL, NULL,
                                          NULL);
        } else {
            return 0;
        }
    }


    if (hint) {
        int             repeat, width = 1;
        long            value;
        char            code = 'd', separ = 0, term = 0, ch, intbuf[16];
        u_char         *ecp;

        if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
            if (!snmp_strcat(buf, buf_len, out_len, allow_realloc,
                             (const u_char *) "STRING: ")) {
                return 0;
            }
        }
        cp = var->val.string;
        ecp = cp + var->val_len;

        while (cp < ecp) {
            repeat = 1;
            if (*hint) {
                if (*hint == '*') {
                    repeat = *cp++;
                    hint++;
                }
                width = 0;
                while ('0' <= *hint && *hint <= '9')
                    width = (width * 10) + (*hint++ - '0');
                code = *hint++;
                if ((ch = *hint) && ch != '*' && (ch < '0' || ch > '9')
                    && (width != 0
                        || (ch != 'x' && ch != 'd' && ch != 'o')))
                    separ = *hint++;
                else
                    separ = 0;
                if ((ch = *hint) && ch != '*' && (ch < '0' || ch > '9')
                    && (width != 0
                        || (ch != 'x' && ch != 'd' && ch != 'o')))
                    term = *hint++;
                else
                    term = 0;
                if (width == 0)
                    width = 1;
            }

            while (repeat && cp < ecp) {
                value = 0;
                if (code != 'a') {
                    for (x = 0; x < width; x++) {
                        value = value * 256 + *cp++;
                    }
                }
                switch (code) {
                case 'x':
                    sprintf(intbuf, "%lx", value);
                    if (!snmp_strcat
                        (buf, buf_len, out_len, allow_realloc,
                         (u_char *) intbuf)) {
                        return 0;
                    }
                    break;
                case 'd':
                    sprintf(intbuf, "%ld", value);
                    if (!snmp_strcat
                        (buf, buf_len, out_len, allow_realloc,
                         (u_char *) intbuf)) {
                        return 0;
                    }
                    break;
                case 'o':
                    sprintf(intbuf, "%lo", value);
                    if (!snmp_strcat
                        (buf, buf_len, out_len, allow_realloc,
                         (u_char *) intbuf)) {
                        return 0;
                    }
                    break;
                case 't': /* new in rfc 3411 */
                case 'a':
                    while ((*out_len + width + 1) >= *buf_len) {
                        if (!(allow_realloc && snmp_realloc(buf, buf_len))) {
                            return 0;
                        }
                    }
                    for (x = 0; x < width && cp < ecp; x++) {
                        *(*buf + *out_len) = *cp++;
                        (*out_len)++;
                    }
                    *(*buf + *out_len) = '\0';
                    break;
                default:
                    *out_len = saved_out_len;
                    if (snmp_strcat(buf, buf_len, out_len, allow_realloc,
                                    (const u_char *) "(Bad hint ignored: ")
                        && snmp_strcat(buf, buf_len, out_len,
                                       allow_realloc,
                                       (const u_char *) saved_hint)
                        && snmp_strcat(buf, buf_len, out_len,
                                       allow_realloc,
                                       (const u_char *) ") ")) {
                        return sprint_realloc_octet_string(buf, buf_len,
                                                           out_len,
                                                           allow_realloc,
                                                           var, enums,
                                                           NULL, NULL);
                    } else {
                        return 0;
                    }
                }

                if (cp < ecp && separ) {
                    while ((*out_len + 1) >= *buf_len) {
                        if (!(allow_realloc && snmp_realloc(buf, buf_len))) {
                            return 0;
                        }
                    }
                    *(*buf + *out_len) = separ;
                    (*out_len)++;
                    *(*buf + *out_len) = '\0';
                }
                repeat--;
            }

            if (term && cp < ecp) {
                while ((*out_len + 1) >= *buf_len) {
                    if (!(allow_realloc && snmp_realloc(buf, buf_len))) {
                        return 0;
                    }
                }
                *(*buf + *out_len) = term;
                (*out_len)++;
                *(*buf + *out_len) = '\0';
            }
        }

        if (units) {
            return (snmp_strcat
                    (buf, buf_len, out_len, allow_realloc,
                     (const u_char *) " ")
                    && snmp_strcat(buf, buf_len, out_len, allow_realloc,
                                   (const u_char *) units));
        }
        if ((*out_len >= *buf_len) &&
            !(allow_realloc && snmp_realloc(buf, buf_len))) {
            return 0;
        }
        *(*buf + *out_len) = '\0';

        return 1;
    }

    output_format = netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_STRING_OUTPUT_FORMAT);
    if (0 == output_format) {
        output_format = NETSNMP_STRING_OUTPUT_GUESS;
    }
    switch (output_format) {
    case NETSNMP_STRING_OUTPUT_GUESS:
        hex = 0;
        for (cp = var->val.string, x = 0; x < (int) var->val_len; x++, cp++) {
            if (!(isprint(*cp) || isspace(*cp))) {
                hex = 1;
            }
        }
        break;

    case NETSNMP_STRING_OUTPUT_ASCII:
        hex = 0;
        break;

    case NETSNMP_STRING_OUTPUT_HEX:
        hex = 1;
        break;
    }

    if (var->val_len == 0) {
        return snmp_strcat(buf, buf_len, out_len, allow_realloc,
                           (const u_char *) "\"\"");
    }

    if (hex) {
        if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
            if (!snmp_strcat
                (buf, buf_len, out_len, allow_realloc,
                 (const u_char *) "\"")) {
                return 0;
            }
        } else {
            if (!snmp_strcat
                (buf, buf_len, out_len, allow_realloc,
                 (const u_char *) "Hex-STRING: ")) {
                return 0;
            }
        }

        if (!sprint_realloc_hexstring(buf, buf_len, out_len, allow_realloc,
                                      var->val.string, var->val_len)) {
            return 0;
        }

        if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
            if (!snmp_strcat
                (buf, buf_len, out_len, allow_realloc,
                 (const u_char *) "\"")) {
                return 0;
            }
        }
    } else {
        if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
            if (!snmp_strcat(buf, buf_len, out_len, allow_realloc,
                             (const u_char *) "STRING: ")) {
                return 0;
            }
        }
        if (!snmp_strcat
            (buf, buf_len, out_len, allow_realloc,
             (const u_char *) "\"")) {
            return 0;
        }
        if (!sprint_realloc_asciistring
            (buf, buf_len, out_len, allow_realloc, var->val.string,
             var->val_len)) {
            return 0;
        }
        if (!snmp_strcat
            (buf, buf_len, out_len, allow_realloc,
             (const u_char *) "\"")) {
            return 0;
        }
    }

    if (units) {
        return (snmp_strcat
                (buf, buf_len, out_len, allow_realloc,
                 (const u_char *) " ")
                && snmp_strcat(buf, buf_len, out_len, allow_realloc,
                               (const u_char *) units));
    }
    return 1;
}

#ifdef OPAQUE_SPECIAL_TYPES

/**
 * Prints a float into a buffer.
 *
 * The variable var is encoded as a floating point value.
 * 
 * If allow_realloc is true the buffer will be (re)allocated to fit in the 
 * needed size. (Note: *buf may change due to this.)
 * 
 * @param buf      Address of the buffer to print to.
 * @param buf_len  Address to an integer containing the size of buf.
 * @param out_len  Incremented by the number of characters printed.
 * @param allow_realloc if not zero reallocate the buffer to fit the 
 *                      needed size.
 * @param var      The variable to encode.
 * @param enums    The enumeration ff this variable is enumerated. may be NULL.
 * @param hint     Contents of the DISPLAY-HINT clause of the MIB.
 *                 See RFC 1903 Section 3.1 for details. may be NULL.
 * @param units    Contents of the UNITS clause of the MIB. may be NULL.
 * 
 * @return 1 on success, or 0 on failure (out of memory, or buffer to
 *         small when not allowed to realloc.)
 */
int
sprint_realloc_float(u_char ** buf, size_t * buf_len,
                     size_t * out_len, int allow_realloc,
                     netsnmp_variable_list * var,
                     struct enum_list *enums,
                     const char *hint, const char *units)
{
    if ((var->type != ASN_OPAQUE_FLOAT) &&
        (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT))) {
        u_char          str[] = "Wrong Type (should be Float): ";
        if (snmp_strcat(buf, buf_len, out_len, allow_realloc, str)) {
            return sprint_realloc_by_type(buf, buf_len, out_len,
                                          allow_realloc, var, NULL, NULL,
                                          NULL);
        } else {
            return 0;
        }
    }

    if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICK_PRINT)) {
        if (!snmp_strcat
            (buf, buf_len, out_len, allow_realloc,
             (const u_char *) "Opaque: Float: ")) {
            return 0;
        }
    }


    /*
     * How much space needed for max. length float?  128 is overkill.  
     */

    while ((*out_len + 128 + 1) >= *buf_len) {
        if (!(allow_realloc && snmp_realloc(buf, buf_len))) {
            return 0;
        }
    }

    sprintf((char *) (*buf + *out_len), "%f", *var->val.floatVal);