Posted by jpluimers on 2018/09/19
I always forget which sides of the connection throw this error, but the client side does as explained in [WayBack] delphi – Troubleshooting EIdConnClosedGracefully Exceptions? – Stack Overflow by [WayBack] Remy Lebeau the main Indy contributor:
EIdConnClosedGracefullymeans the other party … has disconnected its end of the connection. Once that exception has been raised, you cannot send more data to the other party. You must reconnect first.
Posted in Delphi, Development, Software Development | 2 Comments »
Posted by jpluimers on 2018/09/18
I tend to forget that since TPair – introduced in Delphi 2009 – has had a TPair.Create(Key, Value)record initialiser since Delphi 2010, though only fully documented since Delphi XE4:
With some spart short methods, Cosmin Prund shows a really nice helper at [WayBack] delphi – TDictionary populated during create example code – Stack Overflow allowing a call like this:
with TDictHelper<Integer, string> do Dict := Make([P(1, 'one'), P(2, 'two')]);
His answer has all the details (including describing the pros and conse), so here is only the helper:
uses SysUtils, Generics.Collections; type TDictHelper<Key, Value> = class public class function P(const K:Key; const V:Value): TPair<Key, Value>; class function Make(init: array of TPair<Key, Value>): TDictionary<Key, Value>;overload; class function Make(KeyArray: array of Key; ValueArray: array of Value): TDictionary<Key, Value>;overload; end; { TDictHelper<Key, Value> } class function TDictHelper<Key, Value>.Make(init: array of TPair<Key, Value>): TDictionary<Key, Value>; var P: TPair<Key, Value>; begin Result := TDictionary<Key, Value>.Create; for P in init do Result.AddOrSetValue(P.Key, P.Value); end; class function TDictHelper<Key, Value>.Make(KeyArray: array of Key; ValueArray: array of Value): TDictionary<Key, Value>; var i:Integer; begin if Length(KeyArray) <> Length(ValueArray) then raise Exception.Create('Number of keys does not match number of values.'); Result := TDictionary<Key, Value>.Create; for i:=0 to High(KeyArray) do Result.AddOrSetValue(KeyArray[i], ValueArray[i]); end; class function TDictHelper<Key, Value>.P(const K: Key; const V: Value): TPair<Key, Value>; begin Result := TPair<Key, Value>.Create(K, V); end;
–jeroen
Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | 7 Comments »
Posted by jpluimers on 2018/09/18
From one of my scripts: it will find a 64-bit 7z.exe if it was installed as part of the 7-zip installer, then run it with the parameters provided to the batch file.
setlocal
:verify7zip
:: registry trick from http://www.robvanderwoude.com/files/sortdate2_nt.txt
:: extra trick: tokens=2* allows to get the 3rd (and beyond: space delimited!) value in one variable %%b
for /F "tokens=2*" %%a IN ('REG QUERY "HKEY_LOCAL_MACHINE\SOFTWARE\7-Zip" /v Path64 2^>nul') do set sevenZipDirectoryPath=%%b
call :checkMissingSetting sevenZipDirectoryPath || goto :help
set sevenZipExeFilePath=%sevenZipDirectoryPath%7z.exe
if not exist "%sevenZipExeFilePath%" call :showError "No 7-zip executable at %sevenZipExeFilePath%" || goto :help
:run7zip
"%sevenZipExeFilePath%" %*
endlocal
goto :end
:checkMissingSetting
if not defined %1 call :notifyMissingSetting %1 && exit /b 1
call :showSetting %1
exit /b 0
goto :end
:notifyMissingSetting
echo Registry didn't provide the environment variable "%1"
goto :end
:showError
:: remove double quotes using tilde trick:
echo %~1
:help
echo Syntax: %0 7z.exe-commandline-parameters
goto :end
:end
–jeroen
Posted in 7zip, Batch-Files, Compression, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2018/09/18
via [WayBack] Just was sneaking around YouTube and found this video showing how to use DDetours library to hook Win32 api. – Mahdi Safsafi – Google+
–jeroen
Posted in Delphi, Development, Software Development | 3 Comments »
Posted by jpluimers on 2018/09/18
Maastricht University got 2 out of 3: [WayBack] https://twitter.com/ml2mst/status/1030626908629811200 – Jeroen Wiert Pluimers – Google+
–jeroen
via [WayBack] Marti van Lin 🇳🇱 🇮🇱 on Twitter : “Some useful advice from @MaastrichtU #Security #passwords #computerintelligence 😂😂😂 cc: @nixcraft… “
https://twitter.com/ml2mst/status/1030626908629811200
Posted in Power User, Security | Leave a Comment »
Posted by jpluimers on 2018/09/17
Interesting chair. Bit pricy, but I tried it and like it!
–jeroen
Posted in LifeHacker, Power User | Leave a Comment »
Posted by jpluimers on 2018/09/17
The missing of [WayBack] Arjen Kamphuis (@ArjenKamphuis) | Twitter, made me revisit some of his past videos. In addition, I made the list quite a bit longer, as I was not aware he made so many presentations.
Many, but not all, of these videos are listed no YouTube video channel of Arjen Kamphuis.
Be sure to read the book Information Security for Journalists – Gendo he co-authored with Silkie Carlo.
–jeroen
Posted in Power User, Security | Leave a Comment »
Posted by jpluimers on 2018/09/17
A while back, Thomas Mueller assumed that Satellite internet could be an alternative for rural areas in Germany: [WayBack] > Auch der Internet-Anschluss über Satellit funktioniere allenfalls quälend langsam <Das kommt mir aber ziemlich seltsam vor… – Thomas Mueller (dummzeuch) – Google+ as a response to [Archive.is] Telekom-Posse: Wirt soll eine Million Euro für schnelles Internet zahlen – WELT.
So I summed up what throttling to 600 (optimistic) or 1000 millisecond (realistic) latency on a 10 megabit connection means: awfully slow for interactive use.
The problem with satellite based internet is latency times: 500 milliseconds is the physical minimum for a geostationary connection. It can easily double with overbooked connections (default with consumer DSL/Cable/Fiber).
The latency combined with the very chatty nature of most applications, is the real killer for your experience.
Compare that to my speeds 2 years ago: https://wiert.me/2015/10/05/fiber-to-fiber-speed-beats-cable-to-fiber-speed-by-a-factor-2-all-three-internet-connections-are-in-the-same-house/
I just did a comparison with the fiber connection at my brother (who lives some 20 miles away) and work too and re-checked the fiber connections in the article (they stayed the same).
- fiber 1 = home
- fiber 2 = home
- fiber 3 = brother
- fiber 4 = work
Traceroute results:
- fiber 1 to fiber 2: 5 milliseconds
- fiber 3 to fiber 2: 8 milliseconds
- fiber 4 to fiber 2: 4 milliseconds
- cable to fiber 2: 10 millseconds
- ADSL to fiber 2: 15 millseconds
With these, you can have > 50 connections per second.
Satellite gives you 2 connections per second if you are lucky.
The blog page takes ~160 web requests.
- DOM content load ~ 1.0 seconds
- Full load finished ~2.2 seconds
- Render finished ~5.0 seconds
I throttled it down to Satellite speed:
- 10 megabit downstream
- 2 megabit upstream
- 600 millisecond latency
Now this is the load:
- DOM content load ~ 2.9 seconds
- Full load finished ~9.9 seconds
- Render finished ~10.0 seconds
Increasing the latency to 1000 milliseconds brings this:
- DOM content load ~ 4.2 seconds
- Full load finished ~11.8 seconds
- Render finished ~14.9 seconds
Fully loading gmail.com or booking .com with 1000 millisecond latency takes over 30 seconds.
References:
Posted in Internet, Power User | 2 Comments »
Posted by jpluimers on 2018/09/17
Steps to try first:
%windir%\Windowsupdate.log (on my system, it did not reveal anything special)sfc /scannow (which takes a few minutes to run)%windir%\System32\cleanmgr.exe (ensure to clean up update files: it can take tens of minutes to run)Appwiz.cpl try a “Repair” of the Office 2013 installationAppwiz.cpl)
The KB3172614 should also alleviate long during (dozens of minutes) high CPU usage of svchost.exe and TiWorker.exe when searching for Windows updates.
Posted in Office, Office 2013, Power User, Windows, Windows 8.1 | Leave a Comment »
Posted by jpluimers on 2018/09/15
Not sure in which changeset this happened, but here is one example:
1:b8:27:eb:1a:b1:ecff:eb:78:a9:4:0:1:0:1:22:6:67:49:b8:27:eb:78:a9:4The first one was marked static in the DHCP server, which means the Raspberry Pi now did get a different IP address.
This messes up a few places that cannot do proper address resolution.
Anyone who knows where this has changed / is configured?
These did not help finding the cause:
As commented by Leen below, this is about
Wicked changed its defaults to use this DHCPv6 compatible RFC4361 client-id in favour of the older RFC2132 client-id. However, this has caused some issues with older DHCPv4 servers and existing setups where the client-id stored by the server is used to assign a (static) address. It is recommended to fix this server-side, but still, wicked provides several ways of addressing this issue
So here are some links:
2018-02-02 - mt@suse.de - version 0.6.44 - dhcp4: use rfc4361 client-id as new default for ethernet on sle15 (fate#323576). It can be also enabled/disabled in wicked-config(5). - client: fixed broken wicked arp utility command (bsc#1078245) - cleanup: add mising/explicit designated field initializers - pkgconfig: fix to request libnl3 instead of libnl1 - dbus: add missing DBUS_ERROR_FAILED type to a dbus_set_error call and enforce formatting input as string when an extension did not returned any error message. - Removed patch included in the source archive [- 0001-wickedd-explicitly-unbind-slaves-on-deletion.patch]
The traditionally used RFC 2132 DHCPv4
client-idon Ethernet is constructed from the hardware type (01for Ethernet) and followed by the hardware address (the MAC address), for example:01:52:54:00:02:c2:67The RFC 4361
client-idstarts with0xff(instead of the hardware type), followed by the DHCPv6 IAID (the interface-address association ID that describes the interface on the machine), followed by the DHCPv6 DUID (client-idwhich identifies the machine).Using the above hardware type-based and hardware address-based DUID (LLT type used by default), the new RFC 4361 DHCPv4
client-idwould be:
- Using the last bytes of the MAC address as the IAID:
ff:00:02:c2:67:00:01:xx:xx:xx:xx:52:54:00:02:c2:67- When the IAID is a simple incremented number:
ff:00:00:00:01:00:01:xx:xx:xx:xx:52:54:00:02:c2:67
–jeroen
Posted in *nix, Hardware Development, Linux, openSuSE, Power User, Raspberry Pi, SuSE Linux, Tumbleweed | 6 Comments »
The Wiert Corner - irregular stream of stuff 