2005-04-17 00:20:36 +02:00
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/* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 keil Exp $
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*
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* Author Karsten Keil
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* based on the teles driver from Jan den Ouden
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* Copyright by Karsten Keil <keil@isdn4linux.de>
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2012-02-20 04:52:38 +01:00
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*
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2005-04-17 00:20:36 +02:00
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* For changes and modifications please read
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* Documentation/isdn/HiSax.cert
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*
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* Thanks to Jan den Ouden
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* Fritz Elfert
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*
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*/
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#include <linux/init.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 09:04:11 +01:00
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#include <linux/gfp.h>
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2005-04-17 00:20:36 +02:00
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#include "hisax.h"
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#include "isdnl2.h"
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const char *l2_revision = "$Revision: 2.30.2.4 $";
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static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
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static struct Fsm l2fsm;
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enum {
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ST_L2_1,
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ST_L2_2,
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ST_L2_3,
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ST_L2_4,
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ST_L2_5,
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ST_L2_6,
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ST_L2_7,
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ST_L2_8,
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};
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2012-02-20 04:52:38 +01:00
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#define L2_STATE_COUNT (ST_L2_8 + 1)
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2005-04-17 00:20:36 +02:00
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static char *strL2State[] =
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{
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"ST_L2_1",
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"ST_L2_2",
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"ST_L2_3",
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"ST_L2_4",
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"ST_L2_5",
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"ST_L2_6",
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"ST_L2_7",
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"ST_L2_8",
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};
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enum {
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EV_L2_UI,
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EV_L2_SABME,
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EV_L2_DISC,
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EV_L2_DM,
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EV_L2_UA,
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EV_L2_FRMR,
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EV_L2_SUPER,
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EV_L2_I,
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EV_L2_DL_DATA,
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EV_L2_ACK_PULL,
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EV_L2_DL_UNIT_DATA,
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EV_L2_DL_ESTABLISH_REQ,
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EV_L2_DL_RELEASE_REQ,
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EV_L2_MDL_ASSIGN,
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EV_L2_MDL_REMOVE,
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EV_L2_MDL_ERROR,
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EV_L1_DEACTIVATE,
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EV_L2_T200,
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EV_L2_T203,
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EV_L2_SET_OWN_BUSY,
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EV_L2_CLEAR_OWN_BUSY,
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EV_L2_FRAME_ERROR,
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};
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2012-02-20 04:52:38 +01:00
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#define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1)
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2005-04-17 00:20:36 +02:00
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static char *strL2Event[] =
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{
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"EV_L2_UI",
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"EV_L2_SABME",
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"EV_L2_DISC",
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"EV_L2_DM",
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"EV_L2_UA",
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"EV_L2_FRMR",
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"EV_L2_SUPER",
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"EV_L2_I",
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"EV_L2_DL_DATA",
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"EV_L2_ACK_PULL",
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"EV_L2_DL_UNIT_DATA",
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"EV_L2_DL_ESTABLISH_REQ",
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"EV_L2_DL_RELEASE_REQ",
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"EV_L2_MDL_ASSIGN",
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"EV_L2_MDL_REMOVE",
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"EV_L2_MDL_ERROR",
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"EV_L1_DEACTIVATE",
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"EV_L2_T200",
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"EV_L2_T203",
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"EV_L2_SET_OWN_BUSY",
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"EV_L2_CLEAR_OWN_BUSY",
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"EV_L2_FRAME_ERROR",
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};
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static int l2addrsize(struct Layer2 *l2);
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static void
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set_peer_busy(struct Layer2 *l2) {
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test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
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2005-07-08 23:57:23 +02:00
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if (!skb_queue_empty(&l2->i_queue) ||
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!skb_queue_empty(&l2->ui_queue))
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2005-04-17 00:20:36 +02:00
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test_and_set_bit(FLG_L2BLOCK, &l2->flag);
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}
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static void
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clear_peer_busy(struct Layer2 *l2) {
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if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
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test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
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}
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static void
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InitWin(struct Layer2 *l2)
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{
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int i;
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for (i = 0; i < MAX_WINDOW; i++)
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l2->windowar[i] = NULL;
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}
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static int
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freewin1(struct Layer2 *l2)
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{
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int i, cnt = 0;
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for (i = 0; i < MAX_WINDOW; i++) {
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if (l2->windowar[i]) {
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cnt++;
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dev_kfree_skb(l2->windowar[i]);
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l2->windowar[i] = NULL;
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}
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}
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return cnt;
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}
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2005-06-25 23:59:18 +02:00
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static inline void
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2005-04-17 00:20:36 +02:00
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freewin(struct PStack *st)
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{
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freewin1(&st->l2);
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}
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static void
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ReleaseWin(struct Layer2 *l2)
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{
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int cnt;
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2012-02-20 04:52:38 +01:00
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if ((cnt = freewin1(l2)))
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2005-04-17 00:20:36 +02:00
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printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
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}
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2005-06-25 23:59:18 +02:00
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static inline unsigned int
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2005-04-17 00:20:36 +02:00
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cansend(struct PStack *st)
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{
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unsigned int p1;
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2012-02-20 04:52:38 +01:00
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if (test_bit(FLG_MOD128, &st->l2.flag))
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2005-04-17 00:20:36 +02:00
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p1 = (st->l2.vs - st->l2.va) % 128;
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else
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p1 = (st->l2.vs - st->l2.va) % 8;
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return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
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}
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2005-06-25 23:59:18 +02:00
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static inline void
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2005-04-17 00:20:36 +02:00
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clear_exception(struct Layer2 *l2)
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{
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test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
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test_and_clear_bit(FLG_REJEXC, &l2->flag);
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test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
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clear_peer_busy(l2);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2005-04-17 00:20:36 +02:00
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l2headersize(struct Layer2 *l2, int ui)
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{
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return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
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(test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
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}
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inline int
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l2addrsize(struct Layer2 *l2)
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{
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return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
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}
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static int
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2012-02-20 04:52:38 +01:00
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sethdraddr(struct Layer2 *l2, u_char *header, int rsp)
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2005-04-17 00:20:36 +02:00
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{
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u_char *ptr = header;
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int crbit = rsp;
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if (test_bit(FLG_LAPD, &l2->flag)) {
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*ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
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*ptr++ = (l2->tei << 1) | 1;
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return (2);
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} else {
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if (test_bit(FLG_ORIG, &l2->flag))
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crbit = !crbit;
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if (crbit)
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*ptr++ = 1;
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else
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*ptr++ = 3;
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return (1);
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}
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}
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2005-07-27 20:46:09 +02:00
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static inline void
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2005-04-17 00:20:36 +02:00
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enqueue_super(struct PStack *st,
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struct sk_buff *skb)
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{
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if (test_bit(FLG_LAPB, &st->l2.flag))
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st->l1.bcs->tx_cnt += skb->len;
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st->l2.l2l1(st, PH_DATA | REQUEST, skb);
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}
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#define enqueue_ui(a, b) enqueue_super(a, b)
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsUI(u_char *data)
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2005-04-17 00:20:36 +02:00
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{
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return ((data[0] & 0xef) == UI);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsUA(u_char *data)
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2005-04-17 00:20:36 +02:00
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{
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return ((data[0] & 0xef) == UA);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsDM(u_char *data)
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2005-04-17 00:20:36 +02:00
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{
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return ((data[0] & 0xef) == DM);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsDISC(u_char *data)
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2005-04-17 00:20:36 +02:00
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{
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return ((data[0] & 0xef) == DISC);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsSFrame(u_char *data, struct PStack *st)
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2005-04-17 00:20:36 +02:00
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{
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register u_char d = *data;
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2012-02-20 04:52:38 +01:00
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2005-04-17 00:20:36 +02:00
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if (!test_bit(FLG_MOD128, &st->l2.flag))
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d &= 0xf;
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2012-02-20 04:52:38 +01:00
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return (((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
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2005-04-17 00:20:36 +02:00
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsSABME(u_char *data, struct PStack *st)
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2005-04-17 00:20:36 +02:00
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{
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u_char d = data[0] & ~0x10;
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return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsREJ(u_char *data, struct PStack *st)
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2005-04-17 00:20:36 +02:00
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{
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return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsFRMR(u_char *data)
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2005-04-17 00:20:36 +02:00
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{
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return ((data[0] & 0xef) == FRMR);
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}
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2005-06-25 23:59:18 +02:00
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static inline int
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2012-02-20 04:52:38 +01:00
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IsRNR(u_char *data, struct PStack *st)
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2005-04-17 00:20:36 +02:00
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{
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return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
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}
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|
2005-06-25 23:59:18 +02:00
|
|
|
static int
|
2005-04-17 00:20:36 +02:00
|
|
|
iframe_error(struct PStack *st, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1);
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
|
|
|
|
if (test_bit(FLG_ORIG, &st->l2.flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
if (rsp)
|
|
|
|
return 'L';
|
|
|
|
|
|
|
|
|
|
|
|
if (skb->len < i)
|
|
|
|
return 'N';
|
|
|
|
|
|
|
|
if ((skb->len - i) > st->l2.maxlen)
|
|
|
|
return 'O';
|
|
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static int
|
2005-04-17 00:20:36 +02:00
|
|
|
super_error(struct PStack *st, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
if (skb->len != l2addrsize(&st->l2) +
|
|
|
|
(test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1))
|
|
|
|
return 'N';
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static int
|
2005-04-17 00:20:36 +02:00
|
|
|
unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp)
|
|
|
|
{
|
|
|
|
int rsp = (*skb->data & 0x2) >> 1;
|
|
|
|
if (test_bit(FLG_ORIG, &st->l2.flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
if (rsp != wantrsp)
|
|
|
|
return 'L';
|
|
|
|
|
|
|
|
if (skb->len != l2addrsize(&st->l2) + 1)
|
|
|
|
return 'N';
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static int
|
2005-04-17 00:20:36 +02:00
|
|
|
UI_error(struct PStack *st, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &st->l2.flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
if (rsp)
|
|
|
|
return 'L';
|
|
|
|
|
|
|
|
if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1)
|
|
|
|
return 'O';
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static int
|
2005-04-17 00:20:36 +02:00
|
|
|
FRMR_error(struct PStack *st, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int headers = l2addrsize(&st->l2) + 1;
|
|
|
|
u_char *datap = skb->data + headers;
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
|
|
|
|
if (test_bit(FLG_ORIG, &st->l2.flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
if (!rsp)
|
|
|
|
return 'L';
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &st->l2.flag)) {
|
|
|
|
if (skb->len < headers + 5)
|
|
|
|
return 'N';
|
|
|
|
else
|
|
|
|
l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x",
|
2012-02-20 04:52:38 +01:00
|
|
|
datap[0], datap[1], datap[2],
|
|
|
|
datap[3], datap[4]);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
|
|
|
if (skb->len < headers + 3)
|
|
|
|
return 'N';
|
|
|
|
else
|
|
|
|
l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
|
2012-02-20 04:52:38 +01:00
|
|
|
datap[0], datap[1], datap[2]);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int
|
|
|
|
legalnr(struct PStack *st, unsigned int nr)
|
|
|
|
{
|
2012-02-20 04:52:38 +01:00
|
|
|
struct Layer2 *l2 = &st->l2;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128);
|
|
|
|
else
|
|
|
|
return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
setva(struct PStack *st, unsigned int nr)
|
|
|
|
{
|
|
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
int len;
|
|
|
|
u_long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&l2->lock, flags);
|
|
|
|
while (l2->va != nr) {
|
|
|
|
(l2->va)++;
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
l2->va %= 128;
|
|
|
|
else
|
|
|
|
l2->va %= 8;
|
|
|
|
len = l2->windowar[l2->sow]->len;
|
|
|
|
if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type)
|
|
|
|
len = -1;
|
|
|
|
dev_kfree_skb(l2->windowar[l2->sow]);
|
|
|
|
l2->windowar[l2->sow] = NULL;
|
|
|
|
l2->sow = (l2->sow + 1) % l2->window;
|
|
|
|
spin_unlock_irqrestore(&l2->lock, flags);
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >= 0))
|
2005-04-17 00:20:36 +02:00
|
|
|
lli_writewakeup(st, len);
|
|
|
|
spin_lock_irqsave(&l2->lock, flags);
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&l2->lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
send_uframe(struct PStack *st, u_char cmd, u_char cr)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u_char tmp[MAX_HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = sethdraddr(&st->l2, tmp, cr);
|
|
|
|
tmp[i++] = cmd;
|
|
|
|
if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
|
|
|
|
printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n");
|
|
|
|
return;
|
|
|
|
}
|
networking: introduce and use skb_put_data()
A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.
An spatch similar to the one for skb_put_zero() converts many
of the places using it:
@@
identifier p, p2;
expression len, skb, data;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_data(skb, data, len);
|
-p = (t)skb_put(skb, len);
+p = skb_put_data(skb, data, len);
)
(
p2 = (t2)p;
-memcpy(p2, data, len);
|
-memcpy(p, data, len);
)
@@
type t, t2;
identifier p, p2;
expression skb, data;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
|
-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
)
(
p2 = (t2)p;
-memcpy(p2, data, sizeof(*p));
|
-memcpy(p, data, sizeof(*p));
)
@@
expression skb, len, data;
@@
-memcpy(skb_put(skb, len), data, len);
+skb_put_data(skb, data, len);
(again, manually post-processed to retain some comments)
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 14:29:20 +02:00
|
|
|
skb_put_data(skb, tmp, i);
|
2005-04-17 00:20:36 +02:00
|
|
|
enqueue_super(st, skb);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline u_char
|
2012-02-20 04:52:38 +01:00
|
|
|
get_PollFlag(struct PStack *st, struct sk_buff *skb)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
return (skb->data[l2addrsize(&(st->l2))] & 0x10);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline u_char
|
2005-04-17 00:20:36 +02:00
|
|
|
get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u_char PF;
|
|
|
|
|
|
|
|
PF = get_PollFlag(st, skb);
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
return (PF);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
start_t200(struct PStack *st, int i)
|
|
|
|
{
|
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
|
|
|
|
test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
restart_t200(struct PStack *st, int i)
|
|
|
|
{
|
|
|
|
FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
|
|
|
|
test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
stop_t200(struct PStack *st, int i)
|
|
|
|
{
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmDelTimer(&st->l2.t200, i);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
st5_dl_release_l2l3(struct PStack *st)
|
|
|
|
{
|
2012-02-20 04:52:38 +01:00
|
|
|
int pr;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
|
|
|
|
pr = DL_RELEASE | CONFIRM;
|
|
|
|
else
|
|
|
|
pr = DL_RELEASE | INDICATION;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
st->l2.l2l3(st, pr, NULL);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
lapb_dl_release_l2l3(struct PStack *st, int f)
|
|
|
|
{
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | f, NULL);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
establishlink(struct FsmInst *fi)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
u_char cmd;
|
|
|
|
|
|
|
|
clear_exception(&st->l2);
|
|
|
|
st->l2.rc = 0;
|
|
|
|
cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10;
|
|
|
|
send_uframe(st, cmd, CMD);
|
|
|
|
FsmDelTimer(&st->l2.t203, 1);
|
|
|
|
restart_t200(st, 1);
|
|
|
|
test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
|
|
|
|
freewin(st);
|
|
|
|
FsmChangeState(fi, ST_L2_5);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(st, skb))
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C');
|
|
|
|
else
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D');
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(st, skb))
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
|
|
|
|
else {
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(st, skb))
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
|
|
|
|
else {
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
|
|
|
|
}
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_go_st3(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
2012-02-20 04:52:38 +01:00
|
|
|
FsmChangeState(fi, ST_L2_3);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
FsmChangeState(fi, ST_L2_3);
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&st->l2.ui_queue, skb);
|
|
|
|
FsmChangeState(fi, ST_L2_2);
|
|
|
|
st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_queue_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&st->l2.ui_queue, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
tx_ui(struct PStack *st)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u_char header[MAX_HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = sethdraddr(&(st->l2), header, CMD);
|
|
|
|
header[i++] = UI;
|
|
|
|
while ((skb = skb_dequeue(&st->l2.ui_queue))) {
|
|
|
|
memcpy(skb_push(skb, i), header, i);
|
|
|
|
enqueue_ui(st, skb);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&st->l2.ui_queue, skb);
|
|
|
|
tx_ui(st);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_pull(skb, l2headersize(&st->l2, 1));
|
|
|
|
st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb);
|
|
|
|
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
* in states 1-3 for broadcast
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_establish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_pend_rel(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
test_and_set_bit(FLG_PEND_REL, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_disconnect(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
freewin(st);
|
|
|
|
FsmChangeState(fi, ST_L2_6);
|
|
|
|
st->l2.rc = 0;
|
|
|
|
send_uframe(st, DISC | 0x10, CMD);
|
|
|
|
FsmDelTimer(&st->l2.t203, 1);
|
|
|
|
restart_t200(st, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_start_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
|
|
|
|
|
|
|
|
clear_exception(&st->l2);
|
|
|
|
st->l2.vs = 0;
|
|
|
|
st->l2.va = 0;
|
|
|
|
st->l2.vr = 0;
|
|
|
|
st->l2.sow = 0;
|
|
|
|
FsmChangeState(fi, ST_L2_7);
|
|
|
|
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
|
|
|
|
|
|
|
|
st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_UA(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_DM(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
send_uframe(st, DM | get_PollFlagFree(st, skb), RSP);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_restart_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int est = 0, state;
|
|
|
|
|
|
|
|
state = fi->state;
|
|
|
|
|
|
|
|
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
|
|
|
|
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F');
|
|
|
|
|
|
|
|
if (st->l2.vs != st->l2.va) {
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
est = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
clear_exception(&st->l2);
|
|
|
|
st->l2.vs = 0;
|
|
|
|
st->l2.va = 0;
|
|
|
|
st->l2.vr = 0;
|
|
|
|
st->l2.sow = 0;
|
|
|
|
FsmChangeState(fi, ST_L2_7);
|
|
|
|
stop_t200(st, 3);
|
|
|
|
FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
|
|
|
|
|
|
|
|
if (est)
|
|
|
|
st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
|
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
if ((ST_L2_7 == state) || (ST_L2_8 == state))
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_stop_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
FsmDelTimer(&st->l2.t203, 3);
|
|
|
|
stop_t200(st, 4);
|
|
|
|
|
|
|
|
send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
freewin(st);
|
|
|
|
lapb_dl_release_l2l3(st, INDICATION);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_connected(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
2012-02-20 04:52:38 +01:00
|
|
|
int pr = -1;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (!get_PollFlag(st, skb)) {
|
|
|
|
l2_mdl_error_ua(fi, event, arg);
|
|
|
|
return;
|
|
|
|
}
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
|
|
|
|
l2_disconnect(fi, event, arg);
|
|
|
|
|
|
|
|
if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) {
|
|
|
|
pr = DL_ESTABLISH | CONFIRM;
|
|
|
|
} else if (st->l2.vs != st->l2.va) {
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
pr = DL_ESTABLISH | INDICATION;
|
|
|
|
}
|
|
|
|
|
|
|
|
stop_t200(st, 5);
|
|
|
|
|
|
|
|
st->l2.vr = 0;
|
|
|
|
st->l2.vs = 0;
|
|
|
|
st->l2.va = 0;
|
|
|
|
st->l2.sow = 0;
|
|
|
|
FsmChangeState(fi, ST_L2_7);
|
|
|
|
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4);
|
|
|
|
|
|
|
|
if (pr != -1)
|
|
|
|
st->l2.l2l3(st, pr, NULL);
|
|
|
|
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_released(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!get_PollFlag(st, skb)) {
|
|
|
|
l2_mdl_error_ua(fi, event, arg);
|
|
|
|
return;
|
|
|
|
}
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
stop_t200(st, 6);
|
|
|
|
lapb_dl_release_l2l3(st, CONFIRM);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_reestablish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!get_PollFlagFree(st, skb)) {
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(st, skb)) {
|
|
|
|
stop_t200(st, 7);
|
2012-02-20 04:52:38 +01:00
|
|
|
if (!test_bit(FLG_L3_INIT, &st->l2.flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
|
|
|
|
st5_dl_release_l2l3(st);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(st, skb)) {
|
|
|
|
stop_t200(st, 8);
|
|
|
|
lapb_dl_release_l2l3(st, CONFIRM);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct Layer2 *l2;
|
|
|
|
u_char tmp[MAX_HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
l2 = &st->l2;
|
|
|
|
i = sethdraddr(l2, tmp, cr);
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
tmp[i++] = typ;
|
|
|
|
tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0);
|
|
|
|
} else
|
|
|
|
tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
|
|
|
|
if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
|
|
|
|
printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n");
|
|
|
|
return;
|
|
|
|
}
|
networking: introduce and use skb_put_data()
A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.
An spatch similar to the one for skb_put_zero() converts many
of the places using it:
@@
identifier p, p2;
expression len, skb, data;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_data(skb, data, len);
|
-p = (t)skb_put(skb, len);
+p = skb_put_data(skb, data, len);
)
(
p2 = (t2)p;
-memcpy(p2, data, len);
|
-memcpy(p, data, len);
)
@@
type t, t2;
identifier p, p2;
expression skb, data;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
|
-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
)
(
p2 = (t2)p;
-memcpy(p2, data, sizeof(*p));
|
-memcpy(p, data, sizeof(*p));
)
@@
expression skb, len, data;
@@
-memcpy(skb_put(skb, len), data, len);
+skb_put_data(skb, data, len);
(again, manually post-processed to retain some comments)
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 14:29:20 +02:00
|
|
|
skb_put_data(skb, tmp, i);
|
2005-04-17 00:20:36 +02:00
|
|
|
enqueue_super(st, skb);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
enquiry_response(struct PStack *st)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
|
|
|
|
enquiry_cr(st, RNR, RSP, 1);
|
|
|
|
else
|
|
|
|
enquiry_cr(st, RR, RSP, 1);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
2005-06-25 23:59:18 +02:00
|
|
|
static inline void
|
2005-04-17 00:20:36 +02:00
|
|
|
transmit_enquiry(struct PStack *st)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
|
|
|
|
enquiry_cr(st, RNR, CMD, 1);
|
|
|
|
else
|
|
|
|
enquiry_cr(st, RR, CMD, 1);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
|
|
|
|
start_t200(st, 9);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
nrerrorrecovery(struct FsmInst *fi)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
invoke_retransmission(struct PStack *st, unsigned int nr)
|
|
|
|
{
|
|
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
u_int p1;
|
|
|
|
u_long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&l2->lock, flags);
|
|
|
|
if (l2->vs != nr) {
|
|
|
|
while (l2->vs != nr) {
|
|
|
|
(l2->vs)--;
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
l2->vs %= 128;
|
|
|
|
p1 = (l2->vs - l2->va) % 128;
|
|
|
|
} else {
|
|
|
|
l2->vs %= 8;
|
|
|
|
p1 = (l2->vs - l2->va) % 8;
|
|
|
|
}
|
|
|
|
p1 = (p1 + l2->sow) % l2->window;
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0);
|
|
|
|
skb_queue_head(&l2->i_queue, l2->windowar[p1]);
|
|
|
|
l2->windowar[p1] = NULL;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&l2->lock, flags);
|
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&l2->lock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int PollFlag, rsp, typ = RR;
|
|
|
|
unsigned int nr;
|
|
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
|
|
|
|
rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(l2));
|
|
|
|
if (IsRNR(skb->data, st)) {
|
|
|
|
set_peer_busy(l2);
|
|
|
|
typ = RNR;
|
|
|
|
} else
|
|
|
|
clear_peer_busy(l2);
|
|
|
|
if (IsREJ(skb->data, st))
|
|
|
|
typ = REJ;
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
PollFlag = (skb->data[1] & 0x1) == 0x1;
|
|
|
|
nr = skb->data[1] >> 1;
|
|
|
|
} else {
|
|
|
|
PollFlag = (skb->data[0] & 0x10);
|
|
|
|
nr = (skb->data[0] >> 5) & 0x7;
|
|
|
|
}
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (PollFlag) {
|
|
|
|
if (rsp)
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A');
|
|
|
|
else
|
|
|
|
enquiry_response(st);
|
|
|
|
}
|
|
|
|
if (legalnr(st, nr)) {
|
|
|
|
if (typ == REJ) {
|
|
|
|
setva(st, nr);
|
|
|
|
invoke_retransmission(st, nr);
|
|
|
|
stop_t200(st, 10);
|
|
|
|
if (FsmAddTimer(&st->l2.t203, st->l2.T203,
|
|
|
|
EV_L2_T203, NULL, 6))
|
|
|
|
l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ");
|
|
|
|
} else if ((nr == l2->vs) && (typ == RR)) {
|
|
|
|
setva(st, nr);
|
|
|
|
stop_t200(st, 11);
|
|
|
|
FsmRestartTimer(&st->l2.t203, st->l2.T203,
|
|
|
|
EV_L2_T203, NULL, 7);
|
|
|
|
} else if ((l2->va != nr) || (typ == RNR)) {
|
|
|
|
setva(st, nr);
|
2012-02-20 04:52:38 +01:00
|
|
|
if (typ != RR) FsmDelTimer(&st->l2.t203, 9);
|
2005-04-17 00:20:36 +02:00
|
|
|
restart_t200(st, 12);
|
|
|
|
}
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
} else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
|
|
|
|
if (!test_bit(FLG_L3_INIT, &st->l2.flag))
|
|
|
|
skb_queue_tail(&st->l2.i_queue, skb);
|
|
|
|
else
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
|
|
|
|
skb_queue_tail(&st->l2.i_queue, skb);
|
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
|
|
|
|
skb_queue_tail(&st->l2.i_queue, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_iframe(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct Layer2 *l2 = &(st->l2);
|
|
|
|
int PollFlag, ns, i;
|
|
|
|
unsigned int nr;
|
|
|
|
|
|
|
|
i = l2addrsize(l2);
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
PollFlag = ((skb->data[i + 1] & 0x1) == 0x1);
|
|
|
|
ns = skb->data[i] >> 1;
|
|
|
|
nr = (skb->data[i + 1] >> 1) & 0x7f;
|
|
|
|
} else {
|
|
|
|
PollFlag = (skb->data[i] & 0x10);
|
|
|
|
ns = (skb->data[i] >> 1) & 0x7;
|
|
|
|
nr = (skb->data[i] >> 5) & 0x7;
|
|
|
|
}
|
|
|
|
if (test_bit(FLG_OWN_BUSY, &l2->flag)) {
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2012-02-20 04:52:38 +01:00
|
|
|
if (PollFlag) enquiry_response(st);
|
2005-04-17 00:20:36 +02:00
|
|
|
} else if (l2->vr == ns) {
|
|
|
|
(l2->vr)++;
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
l2->vr %= 128;
|
|
|
|
else
|
|
|
|
l2->vr %= 8;
|
|
|
|
test_and_clear_bit(FLG_REJEXC, &l2->flag);
|
|
|
|
|
|
|
|
if (PollFlag)
|
|
|
|
enquiry_response(st);
|
|
|
|
else
|
|
|
|
test_and_set_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
skb_pull(skb, l2headersize(l2, 0));
|
|
|
|
st->l2.l2l3(st, DL_DATA | INDICATION, skb);
|
|
|
|
} else {
|
|
|
|
/* n(s)!=v(r) */
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
|
|
|
|
if (PollFlag)
|
|
|
|
enquiry_response(st);
|
|
|
|
} else {
|
|
|
|
enquiry_cr(st, REJ, RSP, PollFlag);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (legalnr(st, nr)) {
|
|
|
|
if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) {
|
|
|
|
if (nr == st->l2.vs) {
|
|
|
|
stop_t200(st, 13);
|
|
|
|
FsmRestartTimer(&st->l2.t203, st->l2.T203,
|
|
|
|
EV_L2_T203, NULL, 7);
|
|
|
|
} else if (nr != st->l2.va)
|
|
|
|
restart_t200(st, 14);
|
|
|
|
}
|
|
|
|
setva(st, nr);
|
|
|
|
} else {
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
|
|
|
|
enquiry_cr(st, RR, RSP, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_tei(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
st->l2.tei = (long) arg;
|
|
|
|
|
|
|
|
if (fi->state == ST_L2_3) {
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
} else
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&st->l2.ui_queue))
|
2005-04-17 00:20:36 +02:00
|
|
|
tx_ui(st);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) &&
|
2012-02-20 04:52:38 +01:00
|
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
|
|
|
|
} else if (st->l2.rc == st->l2.N200) {
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G');
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
|
|
|
|
st5_dl_release_l2l3(st);
|
|
|
|
} else {
|
|
|
|
st->l2.rc++;
|
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
|
|
|
|
send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM)
|
|
|
|
| 0x10, CMD);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) &&
|
2012-02-20 04:52:38 +01:00
|
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
|
|
|
|
} else if (st->l2.rc == st->l2.N200) {
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H');
|
|
|
|
lapb_dl_release_l2l3(st, CONFIRM);
|
|
|
|
} else {
|
|
|
|
st->l2.rc++;
|
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200,
|
|
|
|
NULL, 9);
|
|
|
|
send_uframe(st, DISC | 0x10, CMD);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) &&
|
2012-02-20 04:52:38 +01:00
|
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
st->l2.rc = 0;
|
|
|
|
FsmChangeState(fi, ST_L2_8);
|
|
|
|
|
|
|
|
transmit_enquiry(st);
|
|
|
|
st->l2.rc++;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) &&
|
2012-02-20 04:52:38 +01:00
|
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
|
|
|
|
if (st->l2.rc == st->l2.N200) {
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
} else {
|
|
|
|
transmit_enquiry(st);
|
|
|
|
st->l2.rc++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) &&
|
2012-02-20 04:52:38 +01:00
|
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
FsmChangeState(fi, ST_L2_8);
|
|
|
|
transmit_enquiry(st);
|
|
|
|
st->l2.rc = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
2015-10-21 14:18:38 +02:00
|
|
|
struct sk_buff *skb, *nskb;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
u_char header[MAX_HEADER_LEN];
|
2011-02-14 01:50:45 +01:00
|
|
|
int i, hdr_space_needed;
|
2005-04-17 00:20:36 +02:00
|
|
|
int unsigned p1;
|
|
|
|
u_long flags;
|
|
|
|
|
|
|
|
if (!cansend(st))
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb = skb_dequeue(&l2->i_queue);
|
|
|
|
if (!skb)
|
|
|
|
return;
|
|
|
|
|
2011-02-15 21:18:09 +01:00
|
|
|
hdr_space_needed = l2headersize(l2, 0);
|
2015-10-21 14:18:38 +02:00
|
|
|
nskb = skb_realloc_headroom(skb, hdr_space_needed);
|
|
|
|
if (!nskb) {
|
|
|
|
skb_queue_head(&l2->i_queue, skb);
|
|
|
|
return;
|
2011-02-14 01:50:45 +01:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
spin_lock_irqsave(&l2->lock, flags);
|
2012-02-20 04:52:38 +01:00
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
2005-04-17 00:20:36 +02:00
|
|
|
p1 = (l2->vs - l2->va) % 128;
|
|
|
|
else
|
|
|
|
p1 = (l2->vs - l2->va) % 8;
|
|
|
|
p1 = (p1 + l2->sow) % l2->window;
|
|
|
|
if (l2->windowar[p1]) {
|
|
|
|
printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
|
|
|
|
p1);
|
|
|
|
dev_kfree_skb(l2->windowar[p1]);
|
|
|
|
}
|
2015-10-21 14:18:38 +02:00
|
|
|
l2->windowar[p1] = skb;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
i = sethdraddr(&st->l2, header, CMD);
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
header[i++] = l2->vs << 1;
|
|
|
|
header[i++] = l2->vr << 1;
|
|
|
|
l2->vs = (l2->vs + 1) % 128;
|
|
|
|
} else {
|
|
|
|
header[i++] = (l2->vr << 5) | (l2->vs << 1);
|
|
|
|
l2->vs = (l2->vs + 1) % 8;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&l2->lock, flags);
|
2015-10-21 14:18:38 +02:00
|
|
|
memcpy(skb_push(nskb, i), header, i);
|
|
|
|
st->l2.l2l1(st, PH_PULL | INDICATION, nskb);
|
2005-04-17 00:20:36 +02:00
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
|
|
|
|
if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) {
|
|
|
|
FsmDelTimer(&st->l2.t203, 13);
|
|
|
|
FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
|
|
|
|
}
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int PollFlag, rsp, rnr = 0;
|
|
|
|
unsigned int nr;
|
|
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
|
|
|
|
rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(l2));
|
|
|
|
|
|
|
|
if (IsRNR(skb->data, st)) {
|
|
|
|
set_peer_busy(l2);
|
|
|
|
rnr = 1;
|
|
|
|
} else
|
|
|
|
clear_peer_busy(l2);
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
PollFlag = (skb->data[1] & 0x1) == 0x1;
|
|
|
|
nr = skb->data[1] >> 1;
|
|
|
|
} else {
|
|
|
|
PollFlag = (skb->data[0] & 0x10);
|
|
|
|
nr = (skb->data[0] >> 5) & 0x7;
|
|
|
|
}
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (rsp && PollFlag) {
|
|
|
|
if (legalnr(st, nr)) {
|
|
|
|
if (rnr) {
|
|
|
|
restart_t200(st, 15);
|
|
|
|
} else {
|
|
|
|
stop_t200(st, 16);
|
|
|
|
FsmAddTimer(&l2->t203, l2->T203,
|
|
|
|
EV_L2_T203, NULL, 5);
|
|
|
|
setva(st, nr);
|
|
|
|
}
|
|
|
|
invoke_retransmission(st, nr);
|
|
|
|
FsmChangeState(fi, ST_L2_7);
|
2005-07-08 23:57:23 +02:00
|
|
|
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
|
|
|
|
} else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
} else {
|
|
|
|
if (!rsp && PollFlag)
|
|
|
|
enquiry_response(st);
|
|
|
|
if (legalnr(st, nr)) {
|
|
|
|
setva(st, nr);
|
|
|
|
} else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(&st->l2) + 1);
|
|
|
|
|
|
|
|
if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */
|
|
|
|
(IsUA(skb->data) && (fi->state == ST_L2_7))) {
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
2005-06-25 23:59:18 +02:00
|
|
|
dev_kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
st->l2.tei = -1;
|
|
|
|
FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
st->l2.tei = -1;
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
|
|
|
|
FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
freewin(st);
|
|
|
|
st->l2.tei = -1;
|
|
|
|
stop_t200(st, 17);
|
|
|
|
st5_dl_release_l2l3(st);
|
|
|
|
FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
st->l2.tei = -1;
|
|
|
|
stop_t200(st, 18);
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
|
|
|
|
FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
freewin(st);
|
|
|
|
st->l2.tei = -1;
|
|
|
|
stop_t200(st, 17);
|
|
|
|
FsmDelTimer(&st->l2.t203, 19);
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
|
|
|
|
FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2006-11-30 05:33:40 +01:00
|
|
|
l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
2012-02-20 04:52:38 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2006-11-30 05:33:40 +01:00
|
|
|
l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
freewin(st);
|
|
|
|
stop_t200(st, 19);
|
|
|
|
st5_dl_release_l2l3(st);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2006-11-30 05:33:40 +01:00
|
|
|
l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
stop_t200(st, 20);
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2006-11-30 05:33:40 +01:00
|
|
|
l2_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
freewin(st);
|
|
|
|
stop_t200(st, 19);
|
|
|
|
FsmDelTimer(&st->l2.t203, 19);
|
|
|
|
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
|
|
|
|
FsmChangeState(fi, ST_L2_4);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
if (!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
enquiry_cr(st, RNR, RSP, 0);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
2012-02-20 04:52:38 +01:00
|
|
|
if (!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
enquiry_cr(st, RR, RSP, 0);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_frame_error(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
st->ma.layer(st, MDL_ERROR | INDICATION, arg);
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct FsmNode L2FnList[] __initdata =
|
|
|
|
{
|
|
|
|
{ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign},
|
|
|
|
{ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3},
|
|
|
|
{ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish},
|
|
|
|
{ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3},
|
|
|
|
{ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
|
|
|
|
{ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
|
|
|
|
{ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release},
|
|
|
|
{ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel},
|
|
|
|
{ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect},
|
|
|
|
{ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect},
|
|
|
|
{ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest},
|
|
|
|
{ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull},
|
|
|
|
{ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue},
|
|
|
|
{ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign},
|
|
|
|
{ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui},
|
|
|
|
{ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui},
|
|
|
|
{ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui},
|
|
|
|
{ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui},
|
|
|
|
{ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui},
|
|
|
|
{ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui},
|
|
|
|
{ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui},
|
|
|
|
{ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei},
|
|
|
|
{ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei},
|
|
|
|
{ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei},
|
|
|
|
{ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove},
|
|
|
|
{ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove},
|
|
|
|
{ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove},
|
|
|
|
{ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove},
|
|
|
|
{ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove},
|
|
|
|
{ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove},
|
|
|
|
{ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove},
|
|
|
|
{ST_L2_4, EV_L2_SABME, l2_start_multi},
|
|
|
|
{ST_L2_5, EV_L2_SABME, l2_send_UA},
|
|
|
|
{ST_L2_6, EV_L2_SABME, l2_send_DM},
|
|
|
|
{ST_L2_7, EV_L2_SABME, l2_restart_multi},
|
|
|
|
{ST_L2_8, EV_L2_SABME, l2_restart_multi},
|
|
|
|
{ST_L2_4, EV_L2_DISC, l2_send_DM},
|
|
|
|
{ST_L2_5, EV_L2_DISC, l2_send_DM},
|
|
|
|
{ST_L2_6, EV_L2_DISC, l2_send_UA},
|
|
|
|
{ST_L2_7, EV_L2_DISC, l2_stop_multi},
|
|
|
|
{ST_L2_8, EV_L2_DISC, l2_stop_multi},
|
|
|
|
{ST_L2_4, EV_L2_UA, l2_mdl_error_ua},
|
|
|
|
{ST_L2_5, EV_L2_UA, l2_connected},
|
|
|
|
{ST_L2_6, EV_L2_UA, l2_released},
|
|
|
|
{ST_L2_7, EV_L2_UA, l2_mdl_error_ua},
|
|
|
|
{ST_L2_8, EV_L2_UA, l2_mdl_error_ua},
|
|
|
|
{ST_L2_4, EV_L2_DM, l2_reestablish},
|
|
|
|
{ST_L2_5, EV_L2_DM, l2_st5_dm_release},
|
|
|
|
{ST_L2_6, EV_L2_DM, l2_st6_dm_release},
|
|
|
|
{ST_L2_7, EV_L2_DM, l2_mdl_error_dm},
|
|
|
|
{ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm},
|
|
|
|
{ST_L2_1, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_2, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_3, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_4, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_5, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_6, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_7, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_8, EV_L2_UI, l2_got_ui},
|
|
|
|
{ST_L2_7, EV_L2_FRMR, l2_got_FRMR},
|
|
|
|
{ST_L2_8, EV_L2_FRMR, l2_got_FRMR},
|
|
|
|
{ST_L2_7, EV_L2_SUPER, l2_st7_got_super},
|
|
|
|
{ST_L2_8, EV_L2_SUPER, l2_st8_got_super},
|
|
|
|
{ST_L2_7, EV_L2_I, l2_got_iframe},
|
|
|
|
{ST_L2_8, EV_L2_I, l2_got_iframe},
|
|
|
|
{ST_L2_5, EV_L2_T200, l2_st5_tout_200},
|
|
|
|
{ST_L2_6, EV_L2_T200, l2_st6_tout_200},
|
|
|
|
{ST_L2_7, EV_L2_T200, l2_st7_tout_200},
|
|
|
|
{ST_L2_8, EV_L2_T200, l2_st8_tout_200},
|
|
|
|
{ST_L2_7, EV_L2_T203, l2_st7_tout_203},
|
|
|
|
{ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue},
|
|
|
|
{ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
|
|
|
|
{ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
|
|
|
|
{ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
|
|
|
|
{ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
|
|
|
|
{ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error},
|
|
|
|
{ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error},
|
|
|
|
{ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error},
|
|
|
|
{ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest},
|
|
|
|
{ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest},
|
2006-11-30 05:33:40 +01:00
|
|
|
{ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
|
2005-04-17 00:20:36 +02:00
|
|
|
{ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
|
|
|
|
{ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
|
2006-11-30 05:33:40 +01:00
|
|
|
{ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da},
|
|
|
|
{ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da},
|
|
|
|
{ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da},
|
|
|
|
{ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da},
|
|
|
|
{ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da},
|
2005-04-17 00:20:36 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
isdnl2_l1l2(struct PStack *st, int pr, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
u_char *datap;
|
|
|
|
int ret = 1, len;
|
|
|
|
int c = 0;
|
|
|
|
|
|
|
|
switch (pr) {
|
2012-02-20 04:52:38 +01:00
|
|
|
case (PH_DATA | INDICATION):
|
|
|
|
datap = skb->data;
|
|
|
|
len = l2addrsize(&st->l2);
|
|
|
|
if (skb->len > len)
|
|
|
|
datap += len;
|
|
|
|
else {
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N');
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (!(*datap & 1)) { /* I-Frame */
|
|
|
|
if (!(c = iframe_error(st, skb)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb);
|
|
|
|
} else if (IsSFrame(datap, st)) { /* S-Frame */
|
|
|
|
if (!(c = super_error(st, skb)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb);
|
|
|
|
} else if (IsUI(datap)) {
|
|
|
|
if (!(c = UI_error(st, skb)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb);
|
|
|
|
} else if (IsSABME(datap, st)) {
|
|
|
|
if (!(c = unnum_error(st, skb, CMD)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb);
|
|
|
|
} else if (IsUA(datap)) {
|
|
|
|
if (!(c = unnum_error(st, skb, RSP)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb);
|
|
|
|
} else if (IsDISC(datap)) {
|
|
|
|
if (!(c = unnum_error(st, skb, CMD)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb);
|
|
|
|
} else if (IsDM(datap)) {
|
|
|
|
if (!(c = unnum_error(st, skb, RSP)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb);
|
|
|
|
} else if (IsFRMR(datap)) {
|
|
|
|
if (!(c = FRMR_error(st, skb)))
|
|
|
|
ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb);
|
|
|
|
} else {
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L');
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
if (c) {
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
if (ret)
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
break;
|
|
|
|
case (PH_PULL | CONFIRM):
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg);
|
|
|
|
break;
|
|
|
|
case (PH_PAUSE | INDICATION):
|
|
|
|
test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag);
|
|
|
|
break;
|
|
|
|
case (PH_PAUSE | CONFIRM):
|
|
|
|
test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag);
|
|
|
|
break;
|
|
|
|
case (PH_ACTIVATE | CONFIRM):
|
|
|
|
case (PH_ACTIVATE | INDICATION):
|
|
|
|
test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag);
|
|
|
|
if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
|
|
|
|
break;
|
|
|
|
case (PH_DEACTIVATE | INDICATION):
|
|
|
|
case (PH_DEACTIVATE | CONFIRM):
|
|
|
|
test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag);
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr);
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
isdnl2_l3l2(struct PStack *st, int pr, void *arg)
|
|
|
|
{
|
|
|
|
switch (pr) {
|
2012-02-20 04:52:38 +01:00
|
|
|
case (DL_DATA | REQUEST):
|
|
|
|
if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) {
|
|
|
|
dev_kfree_skb((struct sk_buff *) arg);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case (DL_UNIT_DATA | REQUEST):
|
|
|
|
if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) {
|
|
|
|
dev_kfree_skb((struct sk_buff *) arg);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case (DL_ESTABLISH | REQUEST):
|
|
|
|
if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) {
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) ||
|
|
|
|
test_bit(FLG_ORIG, &st->l2.flag)) {
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2012-02-20 04:52:38 +01:00
|
|
|
} else {
|
|
|
|
if (test_bit(FLG_LAPD, &st->l2.flag) ||
|
|
|
|
test_bit(FLG_ORIG, &st->l2.flag)) {
|
|
|
|
test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2012-02-20 04:52:38 +01:00
|
|
|
st->l2.l2l1(st, PH_ACTIVATE, NULL);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case (DL_RELEASE | REQUEST):
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag)) {
|
|
|
|
st->l2.l2l1(st, PH_DEACTIVATE, NULL);
|
|
|
|
}
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg);
|
|
|
|
break;
|
|
|
|
case (MDL_ASSIGN | REQUEST):
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg);
|
|
|
|
break;
|
|
|
|
case (MDL_REMOVE | REQUEST):
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg);
|
|
|
|
break;
|
|
|
|
case (MDL_ERROR | RESPONSE):
|
|
|
|
FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg);
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
releasestack_isdnl2(struct PStack *st)
|
|
|
|
{
|
|
|
|
FsmDelTimer(&st->l2.t200, 21);
|
|
|
|
FsmDelTimer(&st->l2.t203, 16);
|
|
|
|
skb_queue_purge(&st->l2.i_queue);
|
|
|
|
skb_queue_purge(&st->l2.ui_queue);
|
|
|
|
ReleaseWin(&st->l2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2m_debug(struct FsmInst *fi, char *fmt, ...)
|
|
|
|
{
|
|
|
|
va_list args;
|
|
|
|
struct PStack *st = fi->userdata;
|
|
|
|
|
|
|
|
va_start(args, fmt);
|
|
|
|
VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args);
|
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
setstack_isdnl2(struct PStack *st, char *debug_id)
|
|
|
|
{
|
|
|
|
spin_lock_init(&st->l2.lock);
|
|
|
|
st->l1.l1l2 = isdnl2_l1l2;
|
|
|
|
st->l3.l3l2 = isdnl2_l3l2;
|
|
|
|
|
|
|
|
skb_queue_head_init(&st->l2.i_queue);
|
|
|
|
skb_queue_head_init(&st->l2.ui_queue);
|
|
|
|
InitWin(&st->l2);
|
|
|
|
st->l2.debug = 0;
|
|
|
|
|
|
|
|
st->l2.l2m.fsm = &l2fsm;
|
|
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
|
|
st->l2.l2m.state = ST_L2_4;
|
|
|
|
else
|
2012-02-20 04:52:38 +01:00
|
|
|
st->l2.l2m.state = ST_L2_1;
|
2005-04-17 00:20:36 +02:00
|
|
|
st->l2.l2m.debug = 0;
|
|
|
|
st->l2.l2m.userdata = st;
|
|
|
|
st->l2.l2m.userint = 0;
|
|
|
|
st->l2.l2m.printdebug = l2m_debug;
|
|
|
|
strcpy(st->l2.debug_id, debug_id);
|
|
|
|
|
|
|
|
FsmInitTimer(&st->l2.l2m, &st->l2.t200);
|
|
|
|
FsmInitTimer(&st->l2.l2m, &st->l2.t203);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
transl2_l3l2(struct PStack *st, int pr, void *arg)
|
|
|
|
{
|
|
|
|
switch (pr) {
|
2012-02-20 04:52:38 +01:00
|
|
|
case (DL_DATA | REQUEST):
|
|
|
|
case (DL_UNIT_DATA | REQUEST):
|
|
|
|
st->l2.l2l1(st, PH_DATA | REQUEST, arg);
|
|
|
|
break;
|
|
|
|
case (DL_ESTABLISH | REQUEST):
|
|
|
|
st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL);
|
|
|
|
break;
|
|
|
|
case (DL_RELEASE | REQUEST):
|
|
|
|
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
setstack_transl2(struct PStack *st)
|
|
|
|
{
|
|
|
|
st->l3.l3l2 = transl2_l3l2;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
releasestack_transl2(struct PStack *st)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
int __init
|
|
|
|
Isdnl2New(void)
|
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{
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l2fsm.state_count = L2_STATE_COUNT;
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l2fsm.event_count = L2_EVENT_COUNT;
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l2fsm.strEvent = strL2Event;
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l2fsm.strState = strL2State;
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2009-07-24 18:26:08 +02:00
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return FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));
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2005-04-17 00:20:36 +02:00
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}
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void
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Isdnl2Free(void)
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{
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FsmFree(&l2fsm);
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}
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