linux-toradex.git/net/phonet/socket.c, branch v3.1

net: convert %p usage to %pK

2011-05-24T05:13:12+00:00

The %pK format specifier is designed to hide exposed kernel pointers,
specifically via /proc interfaces.  Exposing these pointers provides an
easy target for kernel write vulnerabilities, since they reveal the
locations of writable structures containing easily triggerable function
pointers.  The behavior of %pK depends on the kptr_restrict sysctl.

If kptr_restrict is set to 0, no deviation from the standard %p behavior
occurs.  If kptr_restrict is set to 1, the default, if the current user
(intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG
(currently in the LSM tree), kernel pointers using %pK are printed as 0's.
 If kptr_restrict is set to 2, kernel pointers using %pK are printed as
0's regardless of privileges.  Replacing with 0's was chosen over the
default "(null)", which cannot be parsed by userland %p, which expects
"(nil)".

The supporting code for kptr_restrict and %pK are currently in the -mm
tree.  This patch converts users of %p in net/ to %pK.  Cases of printing
pointers to the syslog are not covered, since this would eliminate useful
information for postmortem debugging and the reading of the syslog is
already optionally protected by the dmesg_restrict sysctl.

Signed-off-by: Dan Rosenberg 
Cc: James Morris 
Cc: Eric Dumazet 
Cc: Thomas Graf 
Cc: Eugene Teo 
Cc: Kees Cook 
Cc: Ingo Molnar 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Eric Paris 
Signed-off-by: Andrew Morton 
Signed-off-by: David S. Miller

Phonet: convert bound sockets hash list to RCU

2011-04-15T04:32:53+00:00

This gets rid of the last spinlock in the Phonet stack proper.

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: support active connection without pipe controller on modem

2011-03-09T19:59:33+00:00

This provides support for newer ISI modems with no need for the
earlier experimental compile-time alternative choice. With this,
we can now use the same kernel and userspace with both types of
modems.

This also avoids confusing two different and incompatible state
machines, actively connected vs accepted sockets, and adds
connection response error handling (processing "SYN/RST" of sorts).

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: allocate sock from accept syscall rather than soft IRQ

2011-03-09T19:59:32+00:00

This moves most of the accept logic to process context like other
socket stacks do. Then we can use a few more common socket helpers
and simplify a bit.

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: implement per-socket destination/peer address

2011-02-25T19:19:35+00:00

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: allow multiple listen() and fix small race condition

2011-02-25T19:19:34+00:00

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: 'connect' socket implementation for Pipe controller

2010-10-13T21:40:34+00:00

Based on suggestion by Rémi Denis-Courmont to implement 'connect'
for Pipe controller logic,  this patch implements 'connect' socket
call for the Pipe controller logic.
The patch does following:-
- Removes setsockopts for PNPIPE_CREATE and PNPIPE_DESTROY
- Adds setsockopt for setting the Pipe handle value
- Implements connect socket call
- Updates the Pipe controller logic

User-space should now follow below sequence with Pipe controller:-
-socket
-bind
-setsockopt for PNPIPE_PIPE_HANDLE
-connect
-setsockopt for PNPIPE_ENCAP_IP
-setsockopt for PNPIPE_ENABLE

GPRS/3G data has been tested working fine with this.

Signed-off-by: Kumar Sanghvi 
Acked-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

phonet: Fix build warning.

2010-09-16T04:34:41+00:00

net/phonet/socket.c: In function ‘pn_res_seq_show’:
net/phonet/socket.c:726: warning: format ‘%02X’ expects type ‘unsigned int’, but argument 3 has type ‘long int’

Signed-off-by: David S. Miller

Phonet: list subscribed resources via proc_fs

2010-09-16T04:31:33+00:00

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller

Phonet: hook resource routing to userspace via ioctl()'s

2010-09-16T04:31:32+00:00

I wish we could use something cleaner, such as bind(). But that would
not work since resource subscription is orthogonal/in addition to the
normal object ID allocated via bind(). This is similar to multicasting
which also uses ioctl()'s.

Signed-off-by: Rémi Denis-Courmont 
Signed-off-by: David S. Miller