Comments for Persistent notes

Comment on Non blocking singly linked list by Lev Elbert

Lev Elbert — Fri, 16 Dec 2011 20:10:18 +0000

On the surface this queue looks like lock free. Just replace:
char * ptr = new char[iBufferLength];
with
MsgItem* msqItem = (MsgItem*)_aligned_malloc(sizeof(MsgItem), MEMORY_ALLOCATION_ALIGNMENT);
and “magic happens”.
In fact treads posting the messages are serialized while allocating memory (new/malloc/_aligned_malloc).

Still a good class, because the alternatives lock also on posting messages.

Comment on Understanding Gauss Seidel solver by cuong

cuong — Wed, 14 Dec 2011 12:40:10 +0000

very good

Comment on SIPP: Error opening terminal: cygwin by hashmat

hashmat — Mon, 01 Aug 2011 11:11:48 +0000

I tried above options. But it still gives this error.
On sipp console it shows:
cygwin warning:
MS-DOS style path detected: c:\usr\share\terminfo
Preferred POSIX equivalent is: /cygdrive/c/usr/share/terminfo
CYGWIN environment variable option “nodosfilewarning” turns off this warning.
Consult the user’s guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
Error opening terminal: cygwin.

Comment on A trick to create a service using SC.exe under Windows XP by An

An — Fri, 10 Jun 2011 19:53:03 +0000

About the comment above that there was problems with how the command line tool was written because of the supposed space issue, that is a problem with any command line tool that I am aware of, because if you are reading input parameters that are passed into the command line app, then anytime there is a space, that is interpreted as a new parameter and has to be parsed accordingly. As a developer who has written many command line tools, I think that comment is short sighted and misinforms, because that is a problem with the command shell as a whole, not with the utility per se. Having worked with the command line (cli) on numerous different operating systems for over 20 years now, this has always been an issue regardless of the command line app. Great tip though by the way to show people how to correctly handle parameters that need to have spaces in them. Just my $.02…

Comment on Digest authorization in SIP with MD5 by Kutay

Kutay — Tue, 29 Mar 2011 11:24:34 +0000

In this example, response is:
16e5c07af53f578bf1c08dedc636ffa7

but when I use your algorithm I found something different….

Do you know why?

Thanks,
Kutay

Comment on Digest authorization in SIP with MD5 by Kutay

Kutay — Tue, 29 Mar 2011 11:23:19 +0000

Hi,

Thank you for you short description for this algorithm however, the way that I calculated response parameter is not work for IMS Client. I mean our responses become different after calculation. When I compare my response and client’s response, they seem different.

username=”alice@ericsson.com”
realm=”ericsson.com”
uri=”sip:ericsson.com”
password:”alice”

I do not know how to generate following messages’ response parameter:

REGISTER sip:ericsson.com SIP/2.0
Max-Forwards: 20
CSeq: 1 REGISTER
Expires: 3600
Content-Length: 0
Contact: “Alice” ;+sip.instance=e7def040-f226-4927-bd52-a37f0fdf0067
Authorization: Digest username=”alice@ericsson.com”,realm=”ericsson.com”,nonce=”",response=”",uri=”sip:ericsson.com”
User-Agent: Fokus MONSTER Version: 0.9.13
From: “Alice” ;tag=1000
To: “Alice”
Call-ID: c7fd832a2175d36d8bac9c8f4bfced2d@127.0.0.1
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK3b39625cc9b75f78d0789f5a93554dfb3536

]]]
[SDS] [INFO ]
<– Sent message on UDP [Local: 0.0.0.0:5081 | Remote: 127.0.0.1:5060] [[[
SIP/2.0 401 Unauthorized - Respond to challenge
CSeq: 1 REGISTER
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK3b39625cc9b75f78d0789f5a93554dfb3536;received_port_ext=5081;received=127.0.0.1
WWW-Authenticate: Digest realm="ericsson.com",stale=false,algorithm=MD5,nonce="fe176678b1b5fe0738666a70e05248c4",opaque="d77e6f9d33d5f3baadf33be71aa52403",domain="sip:ericsson.com",qop="auth"
Content-Length: 0
Call-ID: c7fd832a2175d36d8bac9c8f4bfced2d@127.0.0.1
From: "Alice" ;tag=1000
To: "Alice";tag=5066

]]]
[SDS] [INFO ]
–> Received message on UDP [Local: 127.0.0.1:5081 | Remote: 127.0.0.1:5060] [[[
REGISTER sip:ericsson.com SIP/2.0
Max-Forwards: 20
CSeq: 2 REGISTER
Expires: 3600
Content-Length: 0
Contact: “Alice” ;+sip.instance=e7def040-f226-4927-bd52-a37f0fdf0067
Authorization: Digest username=”alice@ericsson.com”,realm=”ericsson.com”,nonce=”fe176678b1b5fe0738666a70e05248c4″,uri=”sip:ericsson.com”,opaque=”d77e6f9d33d5f3baadf33be71aa52403″,algoritm=MD5,response=”16e5c07af53f578bf1c08dedc636ffa7″,qop=auth,nc=00000001,cnonce=”101102559755515299″
User-Agent: Fokus MONSTER Version: 0.9.13
From: “Alice” ;tag=1001
To: “Alice”
Call-ID: a00e832b3171be59068820bba40887de@127.0.0.1
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bKf739c2091e946a283db7449f256244003536

Comment on A trick to create a service using SC.exe under Windows XP by JP

JP — Tue, 04 Jan 2011 16:59:02 +0000

Thanks, this really helped me out.

Comment on A trick to create a service using SC.exe under Windows XP by hb

hb — Thu, 02 Dec 2010 06:29:48 +0000

bravo!! Found this tip after googling for 2 hours!! Thanks a lot! Microsoft, shame on you!! Such a huge hole and not any mention