Public bug reported:
When sending a UDP datagram to an IPv4 address over an IPv6 socket on
Linux, the TTL setting is ignored.
This is based on a problem seen in Java that only happens with Linux but
Windows XP or Mac OS X.
The C code is based on Java's socket implementation in
PlainDatagramSocketImpl.c and net_util.c.
The attached Java and C code demonstrates the problem.
Run the sample code and examine the packets with a tool like tcpdump or
ethereal.
$ sudo tcpdump -i eth0 -vvv dst port 9891
On OS X and Windows, the TTL will be set to 17.
On Linux, the TTL is 1.
This problem does not appear to be Ubunut specific it can be duplicated on
Ubuntu 7.04 / 2.6.20-15-generic
Ubuntu 7.04 / 2.6.20-15-generic x86_64
Debian Sid / 2.6.20-1-686
SuSE Enterprise 9 SP 3 / 2.6.5-7.244-bigsmp
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
--
TTL ignored when sending UDP Datagram to IPv4 address via IPv6 socket
https://bugs.launchpad.net/bugs/112257
You received this bug notification because you are a member of Ubuntu
Bugs, which is the bug contact for Ubuntu.
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
