I have tried to debug android application to print out SSL_write and SSL_read data with that project and print out the file descriptor (to get src&dst ip ) with SSL_get_fd
But for some SSL* the function SSL_get_fd always return -1 instead of return correct fd , and for another SSL* the function SSL_get_fd return the correct fd .
When I tried to use function SSL_is_init_finished just for check on those SSL* that return fd = -1 , I got 1(true)
I saw a same question on : What does it mean, when SSL_get_fd returns -1? but there is no answer there.
How can I get the correct fd from SSL * ?
Related
I have a part of a lua script here:
local cmp = require("component")
local r = cmp.br_reactor
local e = require("event")
local unicode = require ("unicode")
local exit = false
local buffersize = 10000000
local last_tick_percent = 1
print(type(last_tick_percent))
function stored_energy()
local rf_stored = r.getEnergyStored()
local rf_percent = (rf_stored/buffersize)*100
print(type(rf_precent))
print(type(last_tick_percent))
local delta_percent = rf_percent - last_tick_percent
last_tick_percent = re_percent
return rf_percent.."% ["..rf_stored.."] | "..unicode.char(916)..": "..delta_percent.."%"
end
The first print is not even executed for some reason. Inside the function, the first print returns Number while the second print returns nil.
Now I am getting the error attempt to perform arithmetic on upvalue "last_tick_percent" ( a nil value), obviously because last_tick_percent is nil which the print(type(..)) showed.
But i just assigned it literally 5 lines above.
So the questions are:
Why is last_tick_percent nil and how can i fix that?
why is the first print not executed?
you are assigning re_percent which is not declared in your script to last_tick_percent inside stored_energy. i am assuming you meant to assign rf_percent.
function saveScore()
local path = system.pathForFile("scoredata001.txt", system.DocumentsDirectory)
local file = io.open(path, "w")
if file then
local score=get_score() --The get_score() returns the value of current score which is saved in 'score'.
local newScore = compareScore()
local contents = tostring( newScore )
file:write( contents )
io.close( file )
return true
else
print("Error: could not write Score")
return false
end
end
function loadScore()
local path = system.pathForFile("scoredata001.txt", system.DocumentsDirectory)
local contents = ""
local file = io.open( path, "r" )
if file then
local contents = file:read( "*a" )
local score = tonumber(contents);
io.close( file )
return score
end
print("Could not read scores from scoredata.txt")
return nil
end
function return_highScore()
local highscore=loadScore()
if highscore==nil then
highscore=0
end
return highscore
end
function compareScore()
local highscore=return_highScore()
if highscore then
local currscore=get_score()
if highscore==0 then
return highscore
elseif currscore>highscore then
return currscore
end
end
return true
end
function disp_permScore()
local display_score=return_highScore()
text_display2= display.newText("GAME OVER!\n BEST: " ..display_score, 0, 0, "Helvetica", 80)
text_display2.x = centerX
text_display2.y = centerY
text_display2.alpha=1
function gameOver()
mainScreen()
saveScore()
disp_permScore()
end
(This is with refernce to previous question Permission issues in lua )
Basically I'm trying to build a game in lua (This is my first ever game)
But, I'm unable to save highscore to file. If it gets saved, then I'm unable to retrieve them. (In short, I always some or the other error/problem in executing the code.
Please have a look at the code above. I want to display both high score and current score. Current score is being displayed perfect. This is something I tried yesterday night. But now, the high score is not being saved in file. (i.e. the best always displays 0) Also, the cmd says "unable to read scores form scoredata.txt) I'm unable to find where I went wrong.
Please help with this?
Please tell where do I go wrong?
Also, if possible, provide (or edit) the correct code please?
There seems to be a problem on this line
if highscore==0
then
return highscore
Meaning you check if the highscore is 0 and if it is then you return it instead of the actual higher score.
Also, I don't know if your code was just pasting error, but without indenting your code it becomes really hard to read. Try and look again I indentet it and now the error becomes really easy to spot.
I am trying to test a website with selenium using robot framework, I am going backwards and forwards between 2 pages and checking that the second one (problem page is loaded each time)and keeping a count of the results, I'm using the following code
def check_contents_page_loads(self, passed, failed, attempts, counter):
self.driver.get(self.mm + '/config/views')
attempts = int(attempts)
passed = int(passed)
failed = int(failed)
counter = int(counter)
return_passed = str(passed)
return_counter = str(counter)
try:
while attempts > 0:
attempts -= 1
counter += 1
self.driver.find_element_by_class_name("nav-config").click()
time.sleep(5)
self.driver.find_element_by_class_name("nav-content").click()
time.sleep(10)
test = self.driver.find_element_by_class_name("resource-navigator").is_displayed()
print(test)
if test == "True":
passed += 1
else:
failed += 1
except Exception, ex:
logging.exception('dasse %s , %s' % (ex, Exception))
return False
return return_passed, return_counter
When the page is present this works but if the page is not I get the following error message
Cannot assign return values: Expected list-like object, got bool instead.
From robot I am sending the following values
${passed} Set Variable 0
${failed} Set Variable 0
${attempts} Set Variable 20
${counter} Set Variable 0
${return_passed} ${return_counter} Check Contents Page Loads ${passed} ${failed} ${attempts} ${counter}
Should be Equal ${return_passed} ${return_counter}
When an exception is thrown, you're returning a bool of false. You need to correct that.
Situation :
There are two sensors and I want to save the data of values of each sensor in the certain file..But it's not working. I am working on linux system and the file is still empty.
What's wrong with my code? any suggestion please?
my code is:
--Header file
require("TIMER")
require("TIMESTAMP")
require("ANALOG_IN")
function OnExit()
print("Exit code...do something")
end
function main()
timer = "TIMER"
local analogsensor_1 = "AIR_1"
local analogsensor_2 = "AIR_2"
local timestr = os.data("%Y-%m-%d %H:%M:%S")
-- open the file for writing binary data
local filehandle = io.open("collection_of_data.txt", "a")
while true do
valueOfSensor_1 = ANALOG_IN.readAnalogIn(analogsensor_1);
valueOfSensor_2 = ANALOG_IN.readAnalogIn(analogsensor_2);
if (valueOfSensor_1 > 0 and valueOfSensor_2 > 0) then
-- save values of sensors
filehandle:write(timestr, " -The Value of the Sensors: ", tostring(valueOfSensor_1), tostring(valueOfSensor_2)"\n");
end
TIMER.sleep(timer,500)
end
-- close the file
filehandle:close()
end
print("start main")
main()
I do not know what this libs realy do.
But this code is incorrect;
1) you do not close while statement.
if in real code you close it before filehandle:close() then try call filehandle:flush()
2) you forgot comma:
filehandle:write(timestr, " -The Value of the Sensors: ", tostring(valueOfSensor_1), tostring(valueOfSensor_2)"\n")
(it should seay something like attemt call a number value).
3) try print out valueOfSensor_1 and valueOfSensor_2 values. May be there no data.
Beside the typos pointed out by #moteus, shouldn't this:
if (valueOfSensor_1 and valueOfSensor_2 > 0) then
be like this?
if (valueOfSensor_1 > 0 and valueOfSensor_2 > 0) then
Edit, in response to your comment to another answer:
still error..it says "attempt to call field 'data' (a nil value)
I can't be sure without the stack trace, but, most likely, something bad happens in the ANALOG_IN library code. You may not be using it properly.
try to turn this:
valueOfSensor_1 = ANALOG_IN.readAnalogIn(analogsensor_1);
valueOfSensor_2 = ANALOG_IN.readAnalogIn(analogsensor_2);
into this:
success, valueOfSensor_1 = pcall(ANALOG_IN.readAnalogIn, analogsensor_1);
if not success then
print("Warning: error reading the value of sensor 1:\n"..valueOfSensor_1)
valueOfSensor_1 = 0
end
success, valueOfSensor_2 = pcall(ANALOG_IN.readAnalogIn, analogsensor_2);
if not success then
print("Warning: error reading the value of sensor 2:\n"..valueOfSensor_2)
valueOfSensor_2 = 0
end
If the failure in ANALOG_IN is not systematic, it will work around it. If the call fails systematically, you'll get a huge warning log, and an empty collection_of_data.txt.
Please note that ANALOG_IN is not a standard Lua library. You should check its documentation , and pay attention to the details of its usage.
I've read PIL and the ModulesTutorial on creating modules but I'm having trouble require()ing them correctly.
Here is my setup:
-- File ./lib/3rdparty/set.lua
local ipairs = ipairs
module( "set" )
function newSet (t)
local set = {}
for _, l in ipairs(t) do set[l] = true end
return set
end
And:
-- File ./snowplow.lua
local set = require( "lib.3rdparty.set" )
module( "snowplow" )
local SUPPORTED_PLATFORMS = set.newSet { "pc", "tv", "mob", "con", "iot" }
Then if I run snowplow.lua:
lua: snowplow.lua:4: attempt to index local 'set' (a boolean value)
stack traceback:
snowplow.lua:4: in main chunk
[C]: ?
What am I doing wrong in my module definition - what is the boolean exactly? Also, if I append a return _M; at the bottom of my set.lua, then everything starts working - why?
true is usually returned by require if module function is not used inside module and module code doesn't return a value.
But anyway it seems strange.
-- file m0.lua
module'm0'
--file dir1\m1.lua
module'm1'
--file test.lua
print(require'm0')
print(m0)
print(require'dir1.m1')
print(m1)
for k,v in pairs(package.loaded) do
if k:match'm%d' then print(k, v) end
end
--output
table: 0036C8C8
table: 0036C8C8
true
table: 0036B6B0
m0 table: 0036C8C8
m1 table: 0036B6B0
dir1.m1 true
So, you can simply use global variable set instead of local set assigned a value returned by require.
UPD :
It is recommended to avoid using module function and always return your table at the end of your module. In that case the whole picture is just fine:
-- file m0.lua
return 'string0'
--file dir1\m1.lua
return 'string1'
--file test.lua
print(require'm0')
print(m0)
print(require'dir1.m1')
print(m1)
for k,v in pairs(package.loaded) do
if k:match'm%d' then print(k, v) end
end
--output
string0
nil
string1
nil
m0 string0
dir1.m1 string1
UPD2 :
Problem disappears if you replace module( "set" ) with module('lib.3rdparty.set').
So, each module must remember its relative path.
Now you could access it either by calling require'lib.3rdparty.set' or by reading global variable lib.3rdparty.set - the result would be the same.
require("lib.moduleName")
local moduleName = moduleName
I'm not sure why Lua returns a boolean when you require a module on a different directory, but it seems the module is correctly set on the the global variable. So I simply used that and put it on a local variable with the same name.