Пример #1
0
/*
 * After a query, server sends a list of column name with their types
 *
 * | 1 byte | 1 byte                | 0-8 bytes     | variable bytes           |
 * | Length | Size number of fields | Number fields | unknown flags and fields |
 */
static enum proto_parse_status tns_parse_row_description_prefix(struct tns_parser *tns_parser, struct sql_proto_info *info, struct cursor *cursor)
{
    enum proto_parse_status status;
    SLOG(LOG_DEBUG, "Parsing row description prefix");

    CHECK(1);
    unsigned length = cursor_read_u8(cursor);
    DROP_FIX(cursor, length);
    DROP_VAR(cursor);

    if (PROTO_OK != (status = read_field_count(tns_parser, info, cursor))) return status;

    DROP_FIX(cursor, 1);
    for (unsigned i = 0; i < info->u.query.nb_fields; i++) {
        DROP_FIX(cursor, 3);
        DROP_VARS(cursor, 4);
        DROP_DALC(cursor);
        DROP_VARS(cursor, 2);
        DROP_FIX(cursor, 1);
        DROP_VAR(cursor);
        DROP_FIX(cursor, 2);
        for (unsigned i = 0; i < 3; ++i) {
            DROP_DALC(cursor);
        }
        DROP_VAR(cursor);
    }
    DROP_DALC(cursor);
    DROP_VARS(cursor, 2);
    return PROTO_OK;
}
Пример #2
0
static enum proto_parse_status tns_parse_sql_query_jdbc(struct sql_proto_info *info, struct cursor *cursor)
{
    SLOG(LOG_DEBUG, "Parsing a jdbc query");
    enum proto_parse_status status;

    DROP_FIX(cursor, 1);

    uint_least64_t sql_len;
    status = cursor_read_variable_int(cursor, &sql_len);
    if (status != PROTO_OK) return status;
    SLOG(LOG_DEBUG, "Size sql %zu", sql_len);

    DROP_FIX(cursor, 1);
    // We have a number of fields at the end of the query
    uint_least64_t end_len;
    status = cursor_read_variable_int(cursor, &end_len);
    if (status != PROTO_OK) return status;

    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 3);
    DROP_FIX(cursor, 1);
    DROP_VAR(cursor);
    DROP_FIX(cursor, 6);
    DROP_VAR(cursor);

    char *sql = "";
    if (sql_len > 0) {
        // Some unknown bytes
        while (cursor->cap_len > 1 && !isprint(cursor_peek_u8(cursor, 1))) {
            cursor_drop(cursor, 1);
        }

        CHECK(1);
        if (sql_len > 0xff && 0xff == cursor_peek_u8(cursor, 0)) {
            SLOG(LOG_DEBUG, "Looks like prefixed length chunks of size 0xff...");
            status = cursor_read_chunked_string(cursor, &sql, 0xff);
        } else if (sql_len > 0x40 && 0x40 == cursor_peek_u8(cursor, 1)) {
            SLOG(LOG_DEBUG, "Looks like prefixed length chunks of size 0x40...");
            cursor_drop(cursor, 1);
            status = cursor_read_chunked_string(cursor, &sql, 0x40);
        } else {
            if (!isprint(cursor_peek_u8(cursor, 0))) {
                cursor_drop(cursor, 1);
            }
            SLOG(LOG_DEBUG, "Looks like a fixed string of size %zu", sql_len);
            status = cursor_read_fixed_string(cursor, &sql, sql_len);
        }
        if (status != PROTO_OK) return status;
    }
    SLOG(LOG_DEBUG, "Sql parsed: %s", sql);
    sql_set_query(info, "%s", sql);

    SLOG(LOG_DEBUG, "Skipping %zu end variable fields", end_len);
    DROP_VARS(cursor, end_len);
    return PROTO_OK;
}
Пример #3
0
/*
 * | 1 byte | (length + 1) * variable | 1 + 0-8 bytes | nb_ignore * variable | Variable until new ttc |
 * | length | ?                       | Nb ignore     | ?                    | ?                      |
 */
static enum proto_parse_status tns_parse_row_description(struct cursor *cursor)
{
    enum proto_parse_status status;
    SLOG(LOG_DEBUG, "Parsing a row description");

    uint_least64_t length;
    status = cursor_read_variable_int(cursor, &length);
    if (status != PROTO_OK) return status;
    DROP_VARS(cursor, length);
    DROP_VAR(cursor);

    uint_least64_t nb_ignore;
    status = cursor_read_variable_int(cursor, &nb_ignore);
    if (status != PROTO_OK) return status;
    for (unsigned i = 0; i < nb_ignore; i++) {
        DROP_VAR(cursor);
        DROP_DALC(cursor);
        DROP_VAR(cursor);
    }
    CHECK(1);
    // Sometimes, we have some strange bytes...
    while (*cursor->head < 0x03 || *cursor->head > 0x15) {
        CHECK(2);
        DROP_FIX(cursor, 1);
    }
    return PROTO_OK;
}
Пример #4
0
static enum proto_parse_status tns_parse_row_prefix(struct tns_parser *tns_parser,
        struct sql_proto_info *info, struct cursor *cursor)
{
    enum proto_parse_status status;
    SLOG(LOG_DEBUG, "Parsing Row prefix");

    /* A row prefix contains
     * - 1 byte flag
     * - Number column
     * - 5 var
     */
    DROP_FIX(cursor, 1);
    if (PROTO_OK != (status = read_field_count(tns_parser, info, cursor))) return status;
    DROP_VARS(cursor, 5);
    return PROTO_OK;
}
Пример #5
0
static enum proto_parse_status tns_parse_end(struct sql_proto_info *info, struct cursor *cursor)
{
    SLOG(LOG_DEBUG, "Parsing tns end packet");
    enum proto_parse_status status;

    uint_least64_t var[6];
    for (unsigned i = 0; i < 6; i++) {
        if (PROTO_OK != (status = cursor_read_variable_int(cursor, var + i))) return status;
    }

    uint_least64_t nb_rows;
    uint_least64_t error_code;

    // let's use the double 0x00 to guess the position of row number and error code
    if (var[0] > 0 && var[4] == 0 && var[5] == 0) {
        // var[0] is unknown?
        // var[1] == sequence
        // var[2] == rows
        // var[3] == error code
        SLOG(LOG_DEBUG, "Unknown bits after ttc code");
        nb_rows = var[2];
        error_code = var[3];
        DROP_VAR(cursor);
    } else if (var[3] == 0 && var[4] == 0) {
        // var[0] == sequence
        // var[1] == rows
        // var[2] == error code
        nb_rows = var[1];
        error_code = var[2];
    } else {
        // var[0] == rows
        // var[1] == error code
        nb_rows = var[0];
        error_code = var[1];
    }

    if (info->msg_type == SQL_QUERY) {
        sql_set_row_count(info, nb_rows);
        SLOG(LOG_DEBUG, "Nb rows %d", info->u.query.nb_rows);
    }
    SLOG(LOG_DEBUG, "Error code is %zu", error_code);

    DROP_VARS(cursor, 1);
    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 2);
    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 2);
    DROP_FIX(cursor, 1);
    DROP_VARS(cursor, 3);

    if (error_code != 0) {
        SLOG(LOG_DEBUG, "Parsing error message");
        char *error_msg = tempstr();
        unsigned error_len;

        // Drop an unknown number of bytes here
        while(cursor->cap_len > 2 && (cursor_peek_u8(cursor, 0) == 0 || !is_print(cursor_peek_u8(cursor, 1)))){
            DROP_FIX(cursor, 1);
        }
        SLOG(LOG_DEBUG, "First printable char is %c", cursor_peek_u8(cursor, 1));
        status = cursor_read_variable_string(cursor, error_msg, TEMPSTR_SIZE, &error_len);
        if (status != PROTO_OK) return status;
        if (error_len < 12) return PROTO_PARSE_ERR;
        // Split "ORA-XXXX: msg"
        // Part before : is the error code
        // Part after is the localized message
        char *colon_pos = memchr(error_msg, ':', error_len);
        sql_set_request_status(info, SQL_REQUEST_ERROR);
        if (colon_pos) {
            // We extract the error code
            unsigned error_code_size = colon_pos - error_msg;
            int size_err = MIN(error_code_size, sizeof(info->error_code));
            memcpy(info->error_code, error_msg, size_err);
            info->error_code[size_err] = '\0';
            info->set_values |= SQL_ERROR_CODE;
            if (0 == strcmp("ORA-01403", info->error_code))
                info->request_status = SQL_REQUEST_COMPLETE;

            // We skip ':' in errror message
            char const *start_message = colon_pos + 1;
            // We skip spaces before errror message
            while (start_message < error_len + error_msg && *start_message == ' ')
                start_message++;

            copy_string(info->error_message, start_message, sizeof(info->error_message));
            info->set_values |= SQL_ERROR_MESSAGE;
        } else {
            copy_string(info->error_message, error_msg, sizeof(info->error_message));
            info->set_values |= SQL_ERROR_MESSAGE;
        }
    }

    return PROTO_OK;
}
Пример #6
0
static enum proto_parse_status tns_parse_end(struct sql_proto_info *info, struct cursor *cursor)
{
    SLOG(LOG_DEBUG, "Parsing tns end packet");
    enum proto_parse_status status;

    uint_least64_t var0;
    uint_least64_t var1;
    uint_least64_t var2;
    uint_least64_t var3;
    uint_least64_t var4;
    uint_least64_t var5;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var0))) return status;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var1))) return status;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var2))) return status;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var3))) return status;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var4))) return status;
    if (PROTO_OK != (status = cursor_read_variable_int(cursor, &var5))) return status;

    uint_least64_t nb_rows;
    uint_least64_t error_code;

    if (var0 != 0 && var4 == 0 && var5 == 0) {
        // First var is unknown?
        SLOG(LOG_DEBUG, "Unknown bits after ttc code");
        nb_rows = var2;
        error_code = var3;
        DROP_VAR(cursor);
    } else {
        // var0 == sequence
        // var1 == rows
        // var2 == error code
        nb_rows = var1;
        error_code = var2;
    }

    if (info->msg_type == SQL_QUERY) {
        sql_set_row_count(info, nb_rows);
        SLOG(LOG_DEBUG, "Nb rows %d", info->u.query.nb_rows);
    }
    SLOG(LOG_DEBUG, "Error code is %zu", error_code);

    DROP_VARS(cursor, 1);
    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 2);
    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 2);
    DROP_FIX(cursor, 1);
    DROP_VARS(cursor, 3);
    DROP_FIX(cursor, 2);
    DROP_VARS(cursor, 2);

    if (error_code != 0) {
        SLOG(LOG_DEBUG, "Parsing error message");
        char *error_msg;
        unsigned error_len;

        // Drop an unknown number of column here
        while(cursor->cap_len > 1 && !isprint(*(cursor->head + 1))){
            DROP_FIX(cursor, 1);
        }
        status = cursor_read_variable_string(cursor, &error_msg, &error_len);
        if (status != PROTO_OK) return status;
        // Split "ORA-XXXX: msg"
        // Part before : is the error code
        // Part after is the localized message
        char *colon_pos = memchr(error_msg, ':', error_len);
        sql_set_request_status(info, SQL_REQUEST_ERROR);
        if (colon_pos) {
            // We extract the error code
            unsigned error_code_size = colon_pos - error_msg;
            int size_err = MIN(error_code_size, sizeof(info->error_code));
            memcpy(info->error_code, error_msg, size_err);
            info->error_code[size_err] = '\0';
            info->set_values |= SQL_ERROR_CODE;
            if (0 == strcmp("ORA-01403", info->error_code))
                info->request_status = SQL_REQUEST_COMPLETE;

            // We skip ':' in errror message
            char const *start_message = colon_pos + 1;
            // We skip spaces before errror message
            while (start_message < error_len + error_msg && *start_message == ' ')
                start_message++;

            copy_string(info->error_message, start_message, sizeof(info->error_message));
            info->set_values |= SQL_ERROR_MESSAGE;
        } else {
            copy_string(info->error_message, error_msg, sizeof(info->error_message));
            info->set_values |= SQL_ERROR_MESSAGE;
        }
    }

    return PROTO_OK;
}