Re: socket api problem: can't bind an ipv6 socket to ::ffff:0.0.0.0

quoted

Here's an strace:

socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 3
fcntl(3, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
bind(3, {sa_family=AF_INET6, sin6_port=htons(6969), inet_pton(AF_INET6, "::ffff:0.0.0.0", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 EADDRNOTAVAIL (Cannot assign requested address)

This is supposed to work, and it works on other operating systems, even
on Mac OS X.

I think it used to work on Linux, too.

I'm using 2.6.29-rc7 right now, but others have reported this not
working on distro kernels, too.

Felix
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Most likely you already have same port open on IPV4 and unless
you set IPV6 only, the bind bind will fail. The standard way
of doing servers is to bind only for IPV6 and handle IPV4
clients via the 6-4 address mapping.

No I don't have anything else on that port.

BTW, just for the record, binding to ::ffff:10.0.0.3 (my eth0 address at
the moment) still works, so the mechanism is not completely broken.

Felix