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checksum() of char, varchar, nchar, nvarchar, or sql_variant types
Well, quite obviously: because I receive packets that I know are correct but have a wrong checksum! The problem I'm trying to solve is due to a bug in the local ADSL server. It employs NAT and so hosts on the Internet see a different IP address than the one my computer is configured to.

Wrong TCP/IP checksum on server side?
Larry Linson larry.lin...@ntpcug.org comp lang basic visual misc There are a number of different checksum algorithms, all designed to be a reproducible result, so that you can validate that data is unchanged from the time that the checksum was created. Some only validate the entire file, others are designed to

How to store a checksum value at end of file?
Unfortunately a simple #include of checksum.h fails because that file does not itself include the headers required to compile correctly. Several of the arch-specific files are this way. * Some files use VERIFY_READ, VERIFY_WRITE, access_ok from uaccess.h but do not include uaccess.h * Some files have an IPv6

CMOS checksum
To check if %esi is 4byte aligned you should do: testl $3, %esi instead, and then rewrite the slow path to 4byte align %esi (instead of computing the checksum for two bytes and go ahead as happens now). About the non-32bit aligned %esi, it was _not_ needed here. see my previous msg, for explanation.

reverse engineer a 'checksum'?
One calculates the checksum wrong and the other extracts the input checksum from the input string wrongly prior to comparison! This is my best attempt at a VB conversion which doesn't seem to work yet: Private Function IsChecksumOK(strSentence As String) As Boolean On Error GoTo Err_Checksum Dim intPos As Integer,

checksum
At least, it worked fine for me with both single-DES and 3DES, and I think it should be relatively "future-proof" for whatever other wacky enctype/checksum type should come up in the future. Mike, can you try it out and let me know? Wes, could you please apply this patch to snmpksm.c in the net-snmp mainline?

ANNOUNCE: Checksum and CRC Code/Article
Gregory Bond g...@itga.com.au mailing freebsd ports-bugs Number: 70232 Category: ports Synopsis: libpng port has bad checksum Confidential: no Severity: serious Priority: high Responsible: Checksum mismatch for libpng-patch05-pngpread-chunklength.txt. Checksum mismatch for libpng-patch06-pngread-chunklength.txt.

Entirely ignoring TCP and UDP checksum in kernel level
checksum ^= *s++; s++; return checksum; Has worked from me a long time. That is strange because there is a bug in this code if you feed the complete sentence to it. The "$" should not be part of the checksum so the pointer s at the start should point immediately after the "$". Since it is uncommented code this is

CHECKSUM calc for superzap
I am hacking all UDP packets in ip_input, changing some headers and finding the udp checksum using in_pseudo() and setting the packet header csum_flags to CSUM_UDP (I know this is a dirty way of doing it.. but, had to do it for efficiency reasons). When I try to see the checksum after the checksum calculation is

Q: UDP checksum
gclin...@ulkyvx.louisville.edu comp os msdos programmer In article <46v76n$...@news.asu.edu>, barre...@imap1.asu.edu writes: This is a good one: The way this is normally done is to put a number in the big program that will make the checksum of the big program 0. You do that by taking the checksum of the entire big

weak checksum question
Larry Serflaten serfla...@usinternet.com microsoft public vb general discussion "CF" <n...@please.org> wrote Anyone have an idea as to why this checksum algorythm is hangin on the ">", it's just a character? If I remove the ">" from the command a checksum is returned. Unfortunately it is needed! Any ideas?

NMEA Checksum
In Section 17.3 ("TCP Header"), Stevens says of the TCP checksum "The TCP checksum is calculated similar to the UDP checksum", and references the description of the UDP checksum process in Section 11.3 ("UDP Checksum"). This is what lead me to the description I quoted above. Later references to the TCP checksum are

libalias: Incremental Update of Internet Checksum
If you look at the documentation of CHECKSUM, you'll see: "If one of the values in the expression list changes, the checksum of the list also usually changes. However, there is a small chance that the checksum will not change." -- HTH, Vyas, MVP (SQL Server) Check out my SQL Server website

comparing PE files with CRC/checksum
I want to progressively calculate the checksum for all 101 blocks of 1000 adjacent bytes (the first one beginning at position 0, the second one at 1, the third one at 2 and so on). So you'll end up with 101 distinct numbers, am I correct? The easiest (but most stupid and therefore unsuitable for hashing) Easy and

'Progressive' checksum algorithm
s...@hudson.bellovin.org mailing netbsd bugs Number: 19178 Category: pkg Synopsis: patch checksum fails for squid-2.5. Make sure the Makefile and checksum file (/usr/pkgsrc/www/squid/distinfo) are up to date. If you want to override this check, type "make NO_CHECKSUM=yes [other args]". *** Error code 1 I deleted

ports/40162: VIM Patches 115 - 117 don't have checksums
Clive Jones cli...@clivej.demon.co.uk rec games pinball In article <cv9tqtodhf3h31p7742argguihr59ne...@4ax.com>, Steve <st...@woodman.org> writes I replaced the original EPROMS with version 9.4H. When I power up I get a test report that shows that I have a U14 checksum error, however I don't think there's anything

TCPv4 bad checksum - weren't they gone?
Thomas Richter t...@cleopatra.math.tu-berlin.de comp sys atari 8bit Hi, Where is the Checksum Routine stored in the XL/XE os? I want to get rid of it. So what do i have to do, to make the atari always boot, even when I modified the os, and did not change the CRC values. The possibly best way is to always insert the

Wrong TCP/IP checksum on server side?
The BIOS didn't work as checksum was not correct. Now i adjusted the bytes added to meet checksum requirements. This is OK if i am changing some few bytes. I have piece of code ( about 400+ bytes) which i want to insert into BIOS area. So if i get the location where checksum calculation code is stored,

[TRIVIAL] checksum.h header fixes for 2.4
(1) Is that checksum controlled by all the routers before recalculating it due to a TTL change? Yes, any time the IP header changes, the checksum must be recalculated. Since routers change the TTL field, they have to update the checksum. (2) What is the behaviour by default of the router when an incoming datagram

Finding checksum code in BIOS
Josef Möllers josef.moell...@fujitsu-siemens.com comp os linux development apps adeon wrote: What does the checksum cover in the IP header? For example in TCP/IP packet in Ethernet, does it only cover the IP header, or it covers both headers (IP+TCP)? RFC 791, which defines IP, states that "There is no error