Hi,
In spring I tried just to hack up a 3.X version with debian.
I were not able to complete it due other obligations and now I decided to
have a look at the debian version again. Nice that a package was made.
I can confirm the "bug" using 3.2.0-3-rt-amd64.
Using the source package from debian (apt-get source calendarserver)
I added some debug information in the python file, and get :
print SOL_SOCKET
print SCM_RIGHTS
print socketfd
print fd
sendmsg(
socketfd, description, 0, [(SOL_SOCKET, SCM_RIGHTS, pack("i", fd))]
)
2012-07-12 12:35:45+0200 [-] 1
2012-07-12 12:35:45+0200 [-] 1
2012-07-12 12:35:45+0200 [-] 18
2012-07-12 12:35:45+0200 [-] 33
2012-07-12 12:35:45+0200 [-] Unhandled Error
Now :
The header definitions I found so far matches..
/usr/src/linux-headers-3.2.0-3-common/include/linux/socket.h:#define
SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
/usr/src/linux-headers-3.2.0-3-common/include/asm-generic/socket.h:#define
SOL_SOCKET 1
I have yet to look at the structs..
The message is sent in "twext/python/sendmsg.c" line 273,
I added debug infomation to what is going on,
fprintf(ddfp, "fd: %d, mesg: %s %d control : %d, flags:
%x",fd,message_header.msg_name,message_header.msg_namelen,message_header.msg_controllen,flags);
it was a bit tricky (i open a pid debug file and write to it), but got this
output on a failing run :
(line 175ish in sendmsg.c, after PyArg_ParseTuple.)
fprintf(ddfp, "level: %d , type: %d data %d :\n",level,type,data_len);
fprintf(ddfp, "%x %x %x %x\n",data[0],data[1],data[2],data[3]);
level: 1 , type: 1 data 4 :
20 0 0 0
fd: 16 10, mesg: (null) 0 control : 24, flags: 0
level: 1 , type: 1 data 4 :
21 0 0 0
fd: 18 12, mesg: (null) 0 control : 24, flags: 0
20 and 21 is hex, so 32, 33 which is correct.
Size 4 matches int, but need to check if the order is ok.
I will have to look further to what goes wrong with the format
of the call to sendmsg, when I have time.
Found some pointers to
http://www.normalesup.org/~george/comp/libancillary/
Maybe that can be used to simplify the setup.
(depending on license and os compatibility)
/Fred
On Tue, 10 Jul 2012 14:39:06 -0700
Glyph <gl...@twistedmatrix.com> wrote:
> On Jul 10, 2012, at 8:22 AM, tobiasbp <tobia...@gmail.com> wrote:
>
> > socketfd, description, 0, [(SOL_SOCKET, SCM_RIGHTS, pack("i", fd))]
> > socket.error: [Errno 22] Invalid argument
> >
> > Any ideas?
>
> My first guess would be "kernel bug". Any chance you can test with an older
> kernel?
>
> -glyph
>
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