- ipv6calc - lists.deepspace6.net

New version 0.50 released
by Peter Bieringer 15 Sep '05

15 Sep '05

Hi, sorry, but I had no luck with 0.49, there were some stack overflow and off-by-one bugs sleeping since longer time, but now rising up during compiling with some protection options. Many credits to Radek Vokál for finding bugs and pointing out the snprintf size problems. Therefore I released now version 0.50: Available at: <ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/> (and via CVS - note that DS6 currently contain only older versions). Not-minor changes: 20050915/PB various c files - fix snprintf size parameter (credits to Radek Vokál for pointing this out) lib/libipv6addr.c#ipv6addr_copy - fix bug which causes stack overflow (credits to Radek Vokál for finding the bug) several Makefiles - add compiler switch -O2, reason for segfault was found - remove also static on clean ipv6logconv: - add support for unique local unicast update databases Happier using now... Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Re: [ipv6calc] New version 0.49 released [PATCH]
by Peter Bieringer 15 Sep '05

15 Sep '05

--On Donnerstag, 15. September 2005 13:16 +0200 Radek Vokál <rvokal(a)redhat.com> wrote: > Hi Peter, > > again looking into the code, I found another stack corruption :) > It's rather stupid off by one for tempstring when you forget about > ending \0: > > --- ipv6calc/showinfo.c~ 2005-09-15 12:49:22.467626560 +0200 > +++ ipv6calc/showinfo.c 2005-09-15 12:49:22.467626560 +0200 > @@ -286,7 +286,7 @@ > #define DEBUG_function_name "showinfo_ipv6addr" > int showinfo_ipv6addr(const ipv6calc_ipv6addr *ipv6addrp1, const > uint32_t formatoptions) { > int retval = 1, i, j, flag_prefixuse, registry; > - char tempstring[NI_MAXHOST] = "", helpstring[NI_MAXHOST] = ""; > + char tempstring[NI_MAXHOST+1] = "", helpstring[NI_MAXHOST+1] = > ""; > ipv6calc_ipv6addr ipv6addr, *ipv6addrp; > ipv6calc_ipv4addr ipv4addr; > ipv6calc_macaddr macaddr; > > Also using of > > snprintf(helpstring, sizeof(tempstring), "%s,", tempstring); > > is not very nice but here sort of harmless because helpstring and > tempstring are the same size. But it's not so right anyway .. Unfortunately, this bug is everywhere...no wonder that showinfo crashed also by me...will fix them now all. Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Re: [ipv6calc] New version 0.49 released [PATCH]
by Peter Bieringer 15 Sep '05

15 Sep '05

Hi Radek, --On Donnerstag, 15. September 2005 10:47 +0200 Radek Vokál <rvokal(a)redhat.com> wrote: > Hi Peter, > > so here's the bug I found in your code. Seems like you overwrite the > stack in ipv6addr_copy, because you shift the address by i in the stack > and than you "successfully" copy the structure 48x times in the stack. Ooops...wondering how it has ever worked. > So correct copying of the structure is just *dst = *src (this works as > copy for structures so no need to do some memcpy stuff) Thank you very much for the patch, confirmed working, submitted to CVS now. Looks like this was also the reason that -O2 causes problems, reenabled it now. I will release version 0.50 tonight MEST. Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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New version 0.49 released
by Peter Bieringer 15 Sep '05

15 Sep '05

Hi, after a while I released finally version 0.49 Available at: <ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/> (and via CVS - note that DS6 currently contain only older versions). Not-minor changes: 20050914/PB Update databases 20050725/PB lib/libipv6addr ipv6calc/showinfo - add support for Unique Local IPv6 Unicast Addresses 20050719/PB md5/md5.c - fix for proper support of big endian machines lib/libipv6addr - replace hardcoded IPv6 assignement by dynamic one 20050714/PB lib/libipv6addr - IPv6 TLA update 20050628/PB ipv6calc: - replace hardcoded $(root)/bin with $(root)@bindir@ (suggested by Andrew Walrond) 20050212/PB ipv6logconv: - implement a lookup cache for speed-up (around 20%) lib/libipv4addr databases/ipv4-assignment/dbipv4addr_assignment.h - add a hint table for speed-up IPv4 registry lookups (around 10 times!) Happy using, Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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some recent news - please test current CVS version
by Peter Bieringer 25 Jul '05

25 Jul '05

Hi, I've done some work on ipv6calc in the last weeks: - proper compilation on Solaris 8 (triggered by Dan Pritts) - move hardcoded IPv6 assignment database to dynamic one like for IPv4 (credits to Simon Arlott for the patch) some more fixes for proper compilation and less warnings. It's currently tested on Linux, Solaris 8 and NetBSD, please test current CVS version, I will release a new version next week or so, "draft-ietf-ipv6-unique-local-addr" needs to be implemented before. Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Re: [ipv6calc] some recent news - please test current CVS version
by Peter Bieringer 25 Jul '05

25 Jul '05

--On Tuesday, July 19, 2005 03:22:50 PM -0400 Dan Pritts <danno(a)internet2.edu> wrote: > Hi - > > I don't have time to track down why, but the --prefix i specify to > configure isn't making it all the way into the appropriate makefiles. > > this happens on both solaris 8 & macos 10.3 - other than some compiler > warnings, everything seems to work otherwise (built, and passed the > preinstall tests). Hmm, working fine here, but I found that configure has got some magic exec_prefix feature. Have you tried like following: ./configure --prefix=/usr/local --bindir /usr/local/bin --mandir /usr/local/share/man or make install exec_prefix=/usr/local File INSTALLING updated. BTW: can you send me all the compiler warnings, e.g. by make >make.txt 2>&1 Thank you, Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Major speed improvement for ipv6logconv implemented
by Peter Bieringer 13 Feb '05

13 Feb '05

Hi, during analyzing my webserver logfiles I've realized, that one ipv6logconv run requires more than 20 min per. This was the start for profiling this tool and implement a major speed improvment. 2 changes were made: a) ipv6logconv: - implement a lookup cache for speed-up saved around 50% before implenting b) saves around 20% after implementing b) b) lib/libipv4addr databases/ipv4-assignment/dbipv4addr_assignment.h - add a hint table for speed-up IPv4 registry lookups speed up by 10 times! New version is now in CVS, if no problems would be reported, I will publish version 0.49 next weekend. For those who didn't know what ipv6logconv can do for you, take a look at the statistics pages on <http://mirrors.bieringer.de/> Hope this helps, Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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New version 0.48 is available
by Peter Bieringer 21 Nov '04

21 Nov '04

Hi, since my improvements I got no information about troubles, therefore I published now the final 0.48 version. Major changes: Update databases General: - replace md5 function from openssl with a copy of coreutils (licence issue) - add support for IEEE/iab.txt database ipv6calc: - add support for recognizing 6to4 addresses generated by Microsoft OS ipv6logconv: - add support for recognizing 6to4 addresses generated by Microsoft OS - add support for ISATAP addresses Hope this helps, Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Replacment of openssl/md5 and supporting of IEEE/iab.txt
by Peter Bieringer 30 Oct '04

30 Oct '04

Hi, because of license issue, I've replaced the usage of openssl/md5 by a copy from coreutils package. Also I've updated the databases and add support of IEEE/iab.txt for extended OUI information. CVS is updated and you will find a current CVS snapshot tarball at: <ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/> Please try out and report any problems. If there a no problem reports in the next days, I will release version 0.48 soon. Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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New version in CVS gets a new feature: detection of MS 6to4 address
by Peter Bieringer 30 Aug '04

30 Aug '04

Hi, I added one new feature to showinfo and ipv6logconv: detection of Microsoft's 6to4 address (usually 2002:<ipv4addr>::<ipv4addr>). This will give more clarifications on the OUI type statistics: %reqs: reqs: host ------: -----: ---- 69.82%: 25061: local-scope.ouitype.ipv6calc 4.88%: 1751: 6to4-microsoft.ouitype.ipv6calc 4.11%: 1476: 3com.ouitype.ipv6calc 2.79%: 1002: intel.ouitype.ipv6calc 1.92%: 690: cisco.ouitype.ipv6calc <http://mirrors.bieringer.de/stats/distribution-ouitype/> Before the new feature, the 4.88% were counted to local-scope. Also I've updated the URLs to the IPv4 databases, they were changed some time ago. BTW: am I sure that only Microsoft uses this special IID on 6to4? If nobody complain, I will release 0.48 in the next week or so. BTW2: a public available example what can be done with "ipv6logstats" (also contained by this project) is available here: <http://mirrors.bieringer.de/stats/timeline.html> Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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