Can we print out to IPv6 printer with CUPS1.2.7 ?

[michaelrsweet]

Version: 1.2.7 CUPS.org User: haginaka

We'd like to print out from Redhat to the printer(has IPv6 link local address) on IPv6 network.

Our environment: network: shared with both IPv4 and IPv6 How to get address: DHCP Which distribution Redhat Linux Enterprise WS4(have been changed to IPv6) CUPS version into Redhat 1.2.7 *browser to check CUPS status Konqueror

We had confirmed followings for check that our network is OK.

• Linux PC had both IPv4 address and IPv6 address(Link Local address) by "ipconfig" command into Terminal.
• This PC doesn't has a global address of IPv6.
• We tried to "ping6" command to itself. we could get reply.
• We tried to the printer(has IPv6 address), we could get reply.
• We tried this line

  lsmod | grep ipv6

  we had reply "ipv6 177748 -1". So, maybe IPv6 module is running on PC.

---- our try and issue ----

• When we add printer on http://localhost:631 and print out, We can't print out and display "Unable to connect to printer; will retry in 30 seconds..." on localhost web page.
• We had been debug backend's code. It seems that this line into lpd.c occur error. "connect(fd, &(addr->addr.addr), httpAddrLength(&(addr->addr)))"
• We had tried to add printer with this line.

  lpd://[fe80::xxxx:xxxx:xxxx:xxxx]/q

---- Question ----

1. How should we add printer with LPD and IPv6 address ? We had tried this line

   lpd://[fe80::xxxx:xxxx:xxxx:xxxx]/q

2. We got CUPSver1.2.7 source code from cups.org site. and compiled, install. (./configure ->> make ->> make install) Can we print out with IPv6 without special setting of build before compile ?
3. If our build process is correct, How to be available IPv6 into CUPS ?
4. Should we change cupsd.conf file for printing out to IPv6 printer ?

[michaelrsweet]

CUPS.org User: mike

[In the future, please post questions like this to the cups.general group; the bug database is not provided for general support...]

I have had sporatic problems with IPv6 on RHEL4, but not on FC5 or FC6. Make sure you have all of the current updates installed.

For link-local addresses, you must include the interface name in the URI; for IPv6 addresses this means:

lpd://[fe80:xxxx:xxxx:...:xxxx+IFNAME]/q

where "IFNAME" is the name of the interface. Without the interface name, there is no way to determine which interface to use when connecting to the printer...

[talhamughal10]

Hi can i am working on printing document using printer with socket communication in java android studio. i have printer which has link local address and i am stuck to give it a print command using in link local address. when i use its ipv4 address it prints. how to use ipv6 address to print using socket communication.