1. Ipv6 nella Griglia Vincenzo Ciaschini (INFN) CCR/INFNGrid 2011
Some slides originally by Mario Reale, used with permission

2. Use Insert Header & Footer to set this field
A Simple Question
How far are we from having full IPv6 compliance?
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 2

3. Use Insert Header & Footer to set this field
Current Status
# of components: 297
# of non compliant: 25
# of uncertain: 2
Percentage of Compliance: 270/297 = 91%
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 3

4. LFC DPM BDII FTS LB-server CREAM CEmon VOMS glexec GridSite ARC0 lcgdm
IPv6 compliance
Compliant
LFC
DPM
globus-url-copy/gridFTP
BDII
FTS
LB-server
CREAM
CEmon
VOMS
Argus-client
glexec
GridSite
ARC0
IPv6 compliance unknown ( but not aware of clear IPv6 non compliance )
lcgdm
IPv6 compliance still an issue / porting not started
ARC1
SCAS
jobid
DGAS
lcg_utils
AMGA
dcache
LB-client
WMproxy/WMS
Argus-server
Unicore
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 4

5. Use Insert Header & Footer to set this field
How to Test
ecker_V1.0.zip
ar.gz
These two return slightly different reports
The second has less false positives, but also returns false negatives
They do a rough check of the code to spot potentia problems.
Must be refined by hand: automate pass gave 63 failures, of which 34 were false positives
Still, a very big sieve.
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 5

6. Use Insert Header & Footer to set this field
IPv6Care
Runtime detect and patch IPv6 issues
Two modes: detect only and patch
Detect: uses LD_PRELOAD to interpose itself between the application and the OS, and logs calls to problematic functions
Patch: uses LD_PRELOAD to interpose itself between the application and the OS, and converts calls to problematic functions
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 6

7. Most Common Problems Calls to gethostbyname()
Should be getaddrinfo()
Hardcoded usage of
Should be “localhost” or both of “ ” and “::1”
Usage of sockaddr_in[6]
Should be sockaddr_storage
Usage of inet_hton*() and inet_ntoh*()
Should be inet_pton() and inet_ntop()

8. Libraries? Some commonly used libraries do not support IPv6 by default
gSoap – requires special compilation options
OpenSSL – requires you to handle the socket yourself rather than trusting the library

9. How to Write IPv6 compliant code
Two very good guides:
llowUp/Introduction_to_IPv6_programming_ C_Java_PHP_perl.pdf

10. Wealth of information
/IPv6FollowUp
No longer updated but very good. Source of all shown today.

11. Thanks
Many thanks to Mario Reale for contributing his original slides plus a lot of help during the actual transition to IPv6.

12. Use Insert Header & Footer to set this field
Thank you
EMI is partially funded by the European Commission under Grant Agreement INFSO-RI
Use Insert Header & Footer to set this field
Use Insert Header & Footer to set this field 12