problems with lo and AF_NETLINK

problems with lo and AF_NETLINK

[J . A . Magallon]

Hi.

With latest 2.4.6-ac2, my lo interface setup looks like broken.
Initscripts use /sbin/ip (it is a Mandrake Cooker box) to query the interface,
and it only gets 'refused connections'. I think it worked with previous
kernels.

This is an strace of the problem:
werewolf:~# strace ip -o link
...
socket(PF_NETLINK, SOCK_RAW, 0)         = 3
bind(3, {sin_family=AF_NETLINK, {sa_family=16, sa_data="\0\0\0\0\0\0\0\0\0\0\353\215\5\10"}, 12) = 0
getsockname(3, {sin_family=AF_NETLINK, {sa_family=16, sa_data="\0\0\215\17\0\0\0\0\0\0\353\215\5\10"}, [12]) = 0
time(NULL)                              = 994752488
sendto(3, "\24\0\0\0\22\0\1\3\351\267J;\0\0\0\0\21\362\5\10", 20, 0, {sin_family=AF_NETLINK, {sa_family=16, sa_data="\0\0\0\0\0\0\0\0\0\0`d\5\10"}, 12) = -1 ECONNREFUSED (Connection refused)
write(2, "Cannot send dump request: Connec"..., 45Cannot send dump request: Connection refused
) = 45
_exit(1)                                = ?

I saw that NETLINK support has changed a bit in ac series:

Netlink device emulation
CONFIG_NETLINK_DEV
  This option will be removed soon. Any programs that want to use
  character special nodes like /dev/tap0 or /dev/route (all with major
  number 36) need this option, and need to be rewritten soon to use
  the real netlink socket.
  This is a backward compatibility option, choose Y for now.

I have activated it, but nothing changes. Any idea ?

Thanks.

-- 
J.A. Magallon                           #  Let the source be with you...        
mailto:jamagallon@able.es
Mandrake Linux release 8.1 (Cooker) for i586
Linux werewolf 2.4.6-ac2 #1 SMP Sun Jul 8 23:57:11 CEST 2001 i686

problems with lo and AF_NETLINK

[Corin Hartland-Swann]

Hi there,
	
I'm having problems with getting kernel 2.4.12 (and yesterday 2.4.11, but
that has bitten the dust now) to work on my laptop (Dell Inspiron 8000,
PIII-850, 512MB RAM).

I searched the lkml archive, and found the following post which describes
my problem exactly:

  http://marc.theaimsgroup.com/?l=linux-kernel&m=99475318111175&w=2

Unfortunately nobody responded to it. I assume that something to do with
AF_NETLINK has been merged in from the -ac series since 2.4.8, as the
distributor supplied kernel (2.4.8-26mdk) works fine.

As the previous poster suggested, I have tried re-compiling with
CONFIG_NETLINK_DEV, but that didn't help, and I am still getting:

  Cannot send dump request: Connection refused

Does anyone have any suggestions?

Thanks,

Corin

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Re: problems with lo and AF_NETLINK

[J . A . Magallon]

On 20011011 Corin Hartland-Swann wrote:
>
>As the previous poster suggested, I have tried re-compiling with
>CONFIG_NETLINK_DEV, but that didn't help, and I am still getting:
>
>  Cannot send dump request: Connection refused
>

My actual setup (2.4.10-ac12) is:

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_NETLINK=y
CONFIG_RTNETLINK=y
# CONFIG_NETLINK_DEV is not set
# CONFIG_NETFILTER is not set
CONFIG_FILTER=y
CONFIG_UNIX=y
CONFIG_INET=y

But the origin of the question wast that 'pump' DHCP client stopped working.
No I have switched to dhcp-client-3.0-1mdk.

Anybody has pump working with newer kernels ?

-- 
J.A. Magallon                           #  Let the source be with you...        
mailto:jamagallon@able.es
Mandrake Linux release 8.2 (Cooker) for i586
Linux werewolf 2.4.10-ac12-beo #6 SMP Thu Oct 11 17:41:34 CEST 2001 i686