Commit Graph

380 Commits

Author SHA1 Message Date
Vlad Yasevich
b90a137d30 [SCTP]: Correctly set the length of sctp_assoc_change notification
sctp_assoc_change notification may contain the data from a received
ABORT chunk.  Set the length correctly to account for that.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-27 16:40:55 -05:00
Pavel Emelyanov
5f31886ff0 [SCTP]: Pick up an orphaned sctp_sockets_allocated counter.
This counter is currently write-only.

Drawing an analogy with the similar tcp counter, I think
that this one should be pointed by the sockets_allocated
members of sctp_prot and sctpv6_prot.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-20 00:23:01 -08:00
Pavel Emelyanov
8ff65b4603 [SCTP]: Convert sctp_dbg_objcnt to seq files.
This makes the code use a good proc API and the text ~50 bytes shorter.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-09 23:24:58 -08:00
Pavel Emelyanov
3f5340a67e [SCTP]: Use snmp_fold_field instead of a homebrew analogue.
SCPT already depends in INET, so this doesn't create additional
dependencies.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-09 23:23:44 -08:00
Vlad Yasevich
5f9646c3d9 [SCTP]: Make sure the chunk is off the transmitted list prior to freeing.
In a few instances, we need to remove the chunk from the transmitted list
prior to freeing it.  This is because the free code doesn't do that any
more and so we need to do it manually.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-06 21:27:39 -05:00
Wei Yongjun
a869981423 [SCTP]: Fix kernel panic while received ASCONF chunk with bad serial number
While recevied ASCONF chunk with serial number less then needed, kernel
will treat this chunk as a retransmitted ASCONF chunk and find cached
ASCONF-ACK chunk used sctp_assoc_lookup_asconf_ack(). But this function
will always return NO-NULL. So response with cached ASCONF-ACKs chunk
will cause kernel panic.
In function sctp_assoc_lookup_asconf_ack(), if the cached ASCONF-ACKs
list asconf_ack_list is empty, or if the serial being requested does not
exists, the function as it currectly stands returns the actuall
list_head asoc->asconf_ack_list, this is not a cache ASCONF-ACK chunk
but a bogus pointer.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-06 21:27:39 -05:00
Vlad Yasevich
b46ae36de4 [SCTP]: Set ports in every address returned by sctp_getladdrs()
Thomas Dreibholz has reported that port numbers are not filled
in the results of sctp_getladdrs() when the socket was bound
to an ephemeral port.  This is only true, if the address was
not specified either.  So, fill in the port number correctly.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-06 21:27:39 -05:00
Vlad Yasevich
c068be5491 [SCTP]: Correctly reap SSNs when processing FORWARD_TSN chunk
When we recieve a FORWARD_TSN chunk, we need to reap
all the queued fast-forwarded chunks from the ordering queue
 However, if we don't have them queued, we need to see if
the next expected one is there as well.  If it is, start
deliver from that point instead of waiting for the next
chunk to arrive.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-06 21:26:26 -05:00
Vlad Yasevich
01f2d38498 [SCTP]: Kill silly inlines in ulpqueue.c
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-05 10:59:30 -05:00
Vlad Yasevich
0eca8fee0c [SCTP]: Do not increase rwnd when reading partial notification.
When a user reads a partial notification message, do not
update rwnd since notifications must not be counted towards
receive window.

Tested-by: Oliver Roll <mail@oliroll.de>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-05 10:59:30 -05:00
Vlad Yasevich
60c778b259 [SCTP]: Stop claiming that this is a "reference implementation"
I was notified by Randy Stewart that lksctp claims to be
"the reference implementation".  First of all, "the
refrence implementation" was the original implementation
of SCTP in usersapce written ty Randy and a few others.
Second, after looking at the definiton of 'reference implementation',
we don't really meet the requirements.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2008-02-05 10:59:07 -05:00
Wei Yongjun
7cc08b55fc [SCTP]: Fix kernel panic while received AUTH chunk with BAD shared key identifier
If SCTP-AUTH is enabled, received AUTH chunk with BAD shared key 
identifier will cause kernel panic.

Test as following:
step1: enabled /proc/sys/net/sctp/auth_enable
step 2:  connect  to SCTP server with auth capable. Association is 
established between endpoints. Then send a AUTH chunk with a bad 
shareid, SCTP server will kernel panic after received that AUTH chunk.

SCTP client                   SCTP server
  INIT         ---------->  
    (with auth capable)
               <----------    INIT-ACK
                              (with auth capable)
  COOKIE-ECHO  ---------->
               <----------    COOKIE-ACK
  AUTH         ---------->


AUTH chunk is like this:
  AUTH chunk
    Chunk type: AUTH (15)
    Chunk flags: 0x00
    Chunk length: 28
    Shared key identifier: 10
    HMAC identifier: SHA-1 (1)
    HMAC: 0000000000000000000000000000000000000000

The assignment of NULL to key can safely be removed, since key_for_each 
(which is just list_for_each_entry under the covers does an initial 
assignment to key anyway).

If the endpoint_shared_keys list is empty, or if the key_id being 
requested does not exist, the function as it currently stands returns 
the actuall list_head (in this case endpoint_shared_keys.  Since that 
list_head isn't surrounded by an actuall data structure, the last 
iteration through list_for_each_entry will do a container_of on key, and 
we wind up returning a bogus pointer, instead of NULL, as we should.

> Neil Horman wrote:
>> On Tue, Jan 22, 2008 at 05:29:20PM +0900, Wei Yongjun wrote:
>>
>> FWIW, Ack from me.  The assignment of NULL to key can safely be 
>> removed, since
>> key_for_each (which is just list_for_each_entry under the covers does 
>> an initial
>> assignment to key anyway).
>> If the endpoint_shared_keys list is empty, or if the key_id being 
>> requested does
>> not exist, the function as it currently stands returns the actuall 
>> list_head (in
>> this case endpoint_shared_keys.  Since that list_head isn't 
>> surrounded by an
>> actuall data structure, the last iteration through 
>> list_for_each_entry will do a
>> container_of on key, and we wind up returning a bogus pointer, 
>> instead of NULL,
>> as we should.  Wei's patch corrects that.
>>
>> Regards
>> Neil
>>
>> Acked-by: Neil Horman <nhorman@tuxdriver.com>
>>
>
> Yep, the patch is correct.
>
> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
>
> -vlad
>

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-05 03:03:06 -08:00
Wei Yongjun
d2f19fa13e [SCTP]: Fix kernel panic while received AUTH chunk while enabled auth
If STCP is started while /proc/sys/net/sctp/auth_enable is set 0 and
association is established between endpoints. Then if
/proc/sys/net/sctp/auth_enable is set 1, a received AUTH chunk will
cause kernel panic.

Test as following:
step 1: echo 0> /proc/sys/net/sctp/auth_enable
step 2:

   SCTP client                  SCTP server
      INIT          --------->
                    <---------   INIT-ACK
      COOKIE-ECHO   --------->
                    <---------   COOKIE-ACK
step 3:
    echo 1> /proc/sys/net/sctp/auth_enable
step 4:
   SCTP client                  SCTP server
       AUTH        ----------->  Kernel Panic


This patch fix this probleam to treat AUTH chunk as unknow chunk if peer 
has initialized with no auth capable.

> Sorry for the delay.  Was on vacation without net access.
>
> Wei Yongjun wrote:
>>
>>
>> This patch fix this probleam to treat AUTH chunk as unknow chunk if 
>> peer has initialized with no auth capable.
>>
>> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
>
> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
>
>>

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-05 03:02:26 -08:00
Oliver Pinter
ac461a0330 typo fixes in net/sctp/sm_statefuns.c
Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2008-02-03 17:52:41 +02:00
Wei Yongjun
ec9dbb1c3e [SCTP]: Fix miss of report unrecognized HMAC Algorithm parameter
This patch fix miss of check for report unrecognized HMAC Algorithm
parameter.  When AUTH is disabled, goto fall through path to report
unrecognized parameter, else, just break

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-31 19:27:09 -08:00
Denis V. Lunev
f206351a50 [NETNS]: Add namespace parameter to ip_route_output_key.
Needed to propagate it down to the ip_route_output_flow.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:11:07 -08:00
Vlad Yasevich
853f4b5055 [SCTP]: Correctly initialize error when parameter validation failed.
When parameter validation fails, there should be error causes that
specify what type of failure we've encountered.  If the causes are not
there, we lacked memory to allocated them.  Thus make that the default
value for the error.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:08:11 -08:00
David S. Miller
66688ea7c8 [SCTP]: Fix build warning in sctp_sf_do_5_1C_ack().
Reported by Andrew Morton.

net/sctp/sm_statefuns.c: In function 'sctp_sf_do_5_1C_ack':
net/sctp/sm_statefuns.c:484: warning: 'error' may be used uninitialized in this function

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:02:48 -08:00
Daniel Lezcano
bfeade0870 [NETNS][IPV6]: inet6_addr - check ipv6 address per namespace
When a new address is added, we must check if the new address does not
already exists.  This patch makes this check to be aware of a network
namespace, so the check will look if the address already exists for
the specified network namespace. While the addresses are browsed, the
addresses which do not belong to the namespace are discarded.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:01:44 -08:00
Eric W. Biederman
6b175b26c1 [NETNS]: Add netns parameter to inet_(dev_)add_type.
The patch extends the inet_addr_type and inet_dev_addr_type with the
network namespace pointer. That allows to access the different tables
relatively to the network namespace.

The modification of the signature function is reported in all the
callers of the inet_addr_type using the pointer to the well known
init_net.

Acked-by: Benjamin Thery <benjamin.thery@bull.net>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:01:27 -08:00
Pavel Emelyanov
b5ccd792fa [NET]: Simple ctl_table to ctl_path conversions.
This patch includes many places, that only required
replacing the ctl_table-s with appropriate ctl_paths
and call register_sysctl_paths().

Nothing special was done with them.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:01:07 -08:00
Hideo Aoki
3ab224be6d [NET] CORE: Introducing new memory accounting interface.
This patch introduces new memory accounting functions for each network
protocol. Most of them are renamed from memory accounting functions
for stream protocols. At the same time, some stream memory accounting
functions are removed since other functions do same thing.

Renaming:
	sk_stream_free_skb()		->	sk_wmem_free_skb()
	__sk_stream_mem_reclaim()	->	__sk_mem_reclaim()
	sk_stream_mem_reclaim()		->	sk_mem_reclaim()
	sk_stream_mem_schedule 		->    	__sk_mem_schedule()
	sk_stream_pages()      		->	sk_mem_pages()
	sk_stream_rmem_schedule()	->	sk_rmem_schedule()
	sk_stream_wmem_schedule()	->	sk_wmem_schedule()
	sk_charge_skb()			->	sk_mem_charge()

Removeing
	sk_stream_rfree():	consolidates into sock_rfree()
	sk_stream_set_owner_r(): consolidates into skb_set_owner_r()
	sk_stream_mem_schedule()

The following functions are added.
    	sk_has_account(): check if the protocol supports accounting
	sk_mem_uncharge(): do the opposite of sk_mem_charge()

In addition, to achieve consolidation, updating sk_wmem_queued is
removed from sk_mem_charge().

Next, to consolidate memory accounting functions, this patch adds
memory accounting calls to network core functions. Moreover, present
memory accounting call is renamed to new accounting call.

Finally we replace present memory accounting calls with new interface
in TCP and SCTP.

Signed-off-by: Takahiro Yasui <tyasui@redhat.com>
Signed-off-by: Hideo Aoki <haoki@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:00:18 -08:00
Vlad Yasevich
d670119132 [SCTP]: Follow Add-IP security consideratiosn wrt INIT/INIT-ACK
The Security Considerations section of RFC 5061 has the following
text:

   If an SCTP endpoint that supports this extension receives an INIT
   that indicates that the peer supports the ASCONF extension but does
   NOT support the [RFC4895] extension, the receiver of such an INIT
   MUST send an ABORT in response.  Note that an implementation is
   allowed to silently discard such an INIT as an option as well, but
   under NO circumstance is an implementation allowed to proceed with
   the association setup by sending an INIT-ACK in response.

   An implementation that receives an INIT-ACK that indicates that the
   peer does not support the [RFC4895] extension MUST NOT send the
   COOKIE-ECHO to establish the association.  Instead, the
   implementation MUST discard the INIT-ACK and report to the upper-
   layer user that an association cannot be established destroying the
   Transmission Control Block (TCB).

Follow the recomendations.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:25 -08:00
Vlad Yasevich
75205f4783 [SCTP]: Implement ADD-IP special case processing for ABORT chunk
ADD-IP spec has a special case for processing ABORTs:
    F4) ... One special consideration is that ABORT
        Chunks arriving destined to the IP address being deleted MUST be
        ignored (see Section 5.3.1 for further details).

Check if the address we received on is in the DEL state, and if
so, ignore the ABORT.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:24 -08:00
Vlad Yasevich
f57d96b2e9 [SCTP]: Change use_as_src into a full address state
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:24 -08:00
Vlad Yasevich
a08de64d07 [SCTP]: Update ASCONF processing to conform to spec.
The processing of the ASCONF chunks has changed a lot in the
spec.  New items are:
    1. A list of ASCONF-ACK chunks is now cached
    2. The source of the packet is used in response.
    3. New handling for unexpect ASCONF chunks.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:23 -08:00
Vlad Yasevich
ba8a06daed [SCTP]: ADD-IP updates the states where ASCONFs can be sent
C4)  Both ASCONF and ASCONF-ACK Chunks MUST NOT be sent in any SCTP
        state except ESTABLISHED, SHUTDOWN-PENDING, SHUTDOWN-RECEIVED,
        and SHUTDOWN-SENT.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:22 -08:00
Vlad Yasevich
df21857714 [SCTP]: Update association lookup to look at ASCONF chunks as well
ADD-IP draft section 5.2 specifies that if an association can not
be found using the source and destination of the IP packet,
then, if the packet contains ASCONF chunks, the Address Parameter
TLV should be used to lookup an association.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:22 -08:00
Vlad Yasevich
d6de309759 [SCTP]: Add the handling of "Set Primary IP Address" parameter to INIT
The ADD-IP "Set Primary IP Address" parameter is allowed in the
INIT/INIT-ACK exchange.  Allow processing of this parameter during
the INIT/INIT-ACK.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:21 -08:00
Vlad Yasevich
42e30bf346 [SCTP]: Handle the wildcard ADD-IP Address parameter
The Address Parameter in the parameter list of the ASCONF chunk
may be a wildcard address.  In this case special processing
is required.  For the 'add' case, the source IP of the packet is
added.  In the 'del' case, all addresses except the source IP
of packet are removed. In the "mark primary" case, the source
address is marked as primary.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:20 -08:00
Vlad Yasevich
6afd2e83cd [SCTP]: Discard unauthenticated ASCONF and ASCONF ACK chunks
Now that we support AUTH, discard unauthenticated ASCONF and ASCONF ACK
chunks as mandated in the ADD-IP spec.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:59:19 -08:00
Vlad Yasevich
9ad0977fe1 [SCTP]: Use crc32c library for checksum calculations.
The crc32c library used an identical table and algorithm
as SCTP.  Switch to using the library instead of carrying
our own table.  Using crypto layer proved to have too
much overhead compared to using the library directly.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:58:20 -08:00
Joe Perches
b5cb2bbc4c [IPV4] sctp: Use ipv4_is_<type>
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:58:17 -08:00
Pavel Emelyanov
8d8ad9d7c4 [NET]: Name magic constants in sock_wake_async()
The sock_wake_async() performs a bit different actions
depending on "how" argument. Unfortunately this argument
ony has numerical magic values.

I propose to give names to their constants to help people
reading this function callers understand what's going on
without looking into this function all the time.

I suppose this is 2.6.25 material, but if it's not (or the
naming seems poor/bad/awful), I can rework it against the
current net-2.6 tree.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:55:03 -08:00
Pavel Emelyanov
b24b8a247f [NET]: Convert init_timer into setup_timer
Many-many code in the kernel initialized the timer->function
and  timer->data together with calling init_timer(timer). There
is already a helper for this. Use it for networking code.

The patch is HUGE, but makes the code 130 lines shorter
(98 insertions(+), 228 deletions(-)).

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:53:35 -08:00
Vlad Yasevich
036b579b11 [SCTP]: Add back the code that accounted for FORWARD_TSN parameter in INIT.
Some recent changes completely removed accounting for the FORWARD_TSN
parameter length in the INIT and INIT-ACK chunk.  This is wrong and
should be restored.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08 23:30:04 -08:00
Vlad Yasevich
6df9cfc1ad [SCTP]: Correctly handle AUTH parameters in unexpected INIT
When processing an unexpected INIT chunk, we do not need to
do any preservation of the old AUTH parameters.  In fact,
doing such preservations will nullify AUTH and allow connection
stealing.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08 23:30:03 -08:00
Vlad Yasevich
f691724c4d [SCTP]: Fix the name of the authentication event.
The even should be called SCTP_AUTHENTICATION_INDICATION.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08 23:30:02 -08:00
Joe Perches
7aa1b54b74 [SCTP]: Spelling fixes
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-20 14:03:52 -08:00
Vlad Yasevich
ef5d4cf2f9 [SCTP]: Flush fragment queue when exiting partial delivery.
At the end of partial delivery, we may have complete messages
sitting on the fragment queue.  These messages are stuck there
until a new fragment arrives.  This can comletely stall a
given association.  When clearing partial delivery state, flush
any complete messages from the fragment queue and send them on
their way up.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-16 14:05:45 -08:00
Vlad Yasevich
8e71a11c9f [SCTP]: Fix the bind_addr info during migration.
During accept/migrate the code attempts to copy the addresses from
the parent endpoint to the new endpoint.   However, if the parent
was bound to a wildcard address, then we end up pointlessly copying
all of the current addresses on the system.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-07 01:07:49 -08:00
Vlad Yasevich
f26f7c4805 [SCTP]: Add bind hash locking to the migrate code
SCTP accept code tries to add a newliy created socket
to a bind bucket without holding a lock.   On a really
busy system, that can causes slab corruptions.
Add a lock around this code.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-07 01:07:45 -08:00
Vlad Yasevich
b7e0fe9f81 SCTP: Fix build issues with SCTP AUTH.
SCTP-AUTH requires selection of CRYPTO, HMAC and SHA1 since
SHA1 is a MUST requirement for AUTH.  We also support SHA256,
but that's optional, so fix the code to treat it as such.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-29 10:17:42 -05:00
Vlad Yasevich
555d3d5d2b SCTP: Fix chunk acceptance when no authenticated chunks were listed.
In the case where no autheticated chunks were specified, we were still
trying to verify that a given chunk needs authentication and doing so
incorrectly.  Add a check for parameter length to make sure we don't
try to use an empty auth_chunks parameter to verify against.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-29 10:17:42 -05:00
Vlad Yasevich
8ee4be37e8 SCTP: Fix the supported extensions paramter
Supported extensions parameter was not coded right and ended up
over-writing memory or causing skb overflows.  First, remove
the FWD_TSN support from as it shouldn't be there and also fix
the paramter encoding.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-29 10:17:41 -05:00
Vlad Yasevich
9baffaa689 SCTP: Fix SCTP-AUTH to correctly add HMACS paramter.
There was a typo that cleared the HMACS parameters when no
authenticated chunks were specified.  We whould be clearing
the chunks pointer instead of the hmacs.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-29 10:17:41 -05:00
Vlad Yasevich
fd10279bc7 SCTP: Fix the number of HB transmissions.
Our treatment of Heartbeats is special in that the inital HB chunk
counts against the error count for the association, where as for
other chunks, only retransmissions or timeouts count against us.
As a result, we had an off-by-1 situation with a number of
Heartbeats we could send.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-29 10:17:41 -05:00
Joe Perches
9ee46f1d31 [SCTP]: Add missing "space"
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-19 23:47:47 -08:00
Jesper Juhl
9abed245a6 Fix memory leak in discard case of sctp_sf_abort_violation()
In net/sctp/sm_statefuns.c::sctp_sf_abort_violation() we may leak
the storage allocated for 'abort' by returning from the function
without using or freeing it. This happens in case
"sctp_auth_recv_cid(SCTP_CID_ABORT, asoc)" is true and we jump to
the 'discard' label.
Spotted by the Coverity checker.

The simple fix is to simply move the creation of the "abort chunk"
to after the possible jump to the 'discard' label. This way we don't
even have to allocate the memory at all in the problem case.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-12 10:13:24 -05:00
Vlad Yasevich
7d54dc6876 SCTP: Always flush the queue when uncorcking.
When the code calls uncork, trigger a queue flush, even
if the queue was not corked.  Most callers that explicitely
cork the queue will have additinal checks to see if they 
corked it.  Callers who do not cork the queue expect packets
to flow when they call uncork.

The scneario that showcased this bug happend when we were not
able to bundle DATA with outgoing COOKIE-ECHO.  As a result
the data just sat in the outqueue and did not get transmitted.
The application expected a response, but nothing happened.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
2007-11-09 11:43:41 -05:00