2008-07-27 07:54:58 +08:00
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/*
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*
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* Author Karsten Keil <kkeil@novell.com>
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*
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* Copyright 2008 by Karsten Keil <kkeil@novell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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2008-12-13 13:15:17 +08:00
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#include <linux/mISDNif.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 16:04:11 +08:00
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#include <linux/slab.h>
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2008-12-13 13:15:17 +08:00
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#include "core.h"
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2008-07-27 07:54:58 +08:00
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#include "fsm.h"
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#include "layer2.h"
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2008-12-13 13:13:45 +08:00
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static u_int *debug;
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2008-07-27 07:54:58 +08:00
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static
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struct Fsm l2fsm = {NULL, 0, 0, NULL, NULL};
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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_UNITDATA,
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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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#define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1)
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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_UNITDATA",
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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 void
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l2m_debug(struct FsmInst *fi, char *fmt, ...)
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{
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struct layer2 *l2 = fi->userdata;
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2010-11-09 22:35:16 +08:00
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struct va_format vaf;
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2008-07-27 07:54:58 +08:00
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va_list va;
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if (!(*debug & DEBUG_L2_FSM))
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return;
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2010-11-09 22:35:16 +08:00
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2008-07-27 07:54:58 +08:00
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va_start(va, fmt);
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2010-11-09 22:35:16 +08:00
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vaf.fmt = fmt;
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vaf.va = &va;
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printk(KERN_DEBUG "l2 (sapi %d tei %d): %pV\n",
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l2->sapi, l2->tei, &vaf);
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2008-07-27 07:54:58 +08:00
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va_end(va);
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}
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inline u_int
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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 u_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 u_int
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l2_newid(struct layer2 *l2)
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{
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u_int id;
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id = l2->next_id++;
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if (id == 0x7fff)
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l2->next_id = 1;
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id <<= 16;
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id |= l2->tei << 8;
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id |= l2->sapi;
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return id;
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}
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static void
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l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb)
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{
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int err;
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if (!l2->up)
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return;
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mISDN_HEAD_PRIM(skb) = prim;
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mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr;
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err = l2->up->send(l2->up, skb);
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if (err) {
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printk(KERN_WARNING "%s: err=%d\n", __func__, err);
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dev_kfree_skb(skb);
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}
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}
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static void
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l2up_create(struct layer2 *l2, u_int prim, int len, void *arg)
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{
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struct sk_buff *skb;
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struct mISDNhead *hh;
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int err;
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if (!l2->up)
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return;
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skb = mI_alloc_skb(len, GFP_ATOMIC);
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if (!skb)
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return;
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hh = mISDN_HEAD_P(skb);
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hh->prim = prim;
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hh->id = (l2->ch.nr << 16) | l2->ch.addr;
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if (len)
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memcpy(skb_put(skb, len), arg, len);
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err = l2->up->send(l2->up, skb);
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if (err) {
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printk(KERN_WARNING "%s: err=%d\n", __func__, err);
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dev_kfree_skb(skb);
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}
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}
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static int
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l2down_skb(struct layer2 *l2, struct sk_buff *skb) {
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int ret;
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ret = l2->ch.recv(l2->ch.peer, skb);
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if (ret && (*debug & DEBUG_L2_RECV))
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printk(KERN_DEBUG "l2down_skb: ret(%d)\n", ret);
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return ret;
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}
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static int
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l2down_raw(struct layer2 *l2, struct sk_buff *skb)
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{
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struct mISDNhead *hh = mISDN_HEAD_P(skb);
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if (hh->prim == PH_DATA_REQ) {
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if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) {
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skb_queue_tail(&l2->down_queue, skb);
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return 0;
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}
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l2->down_id = mISDN_HEAD_ID(skb);
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}
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return l2down_skb(l2, skb);
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}
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static int
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l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb)
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{
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struct mISDNhead *hh = mISDN_HEAD_P(skb);
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hh->prim = prim;
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hh->id = id;
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return l2down_raw(l2, skb);
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}
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static int
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l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg)
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{
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struct sk_buff *skb;
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int err;
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struct mISDNhead *hh;
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skb = mI_alloc_skb(len, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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hh = mISDN_HEAD_P(skb);
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hh->prim = prim;
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hh->id = id;
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if (len)
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memcpy(skb_put(skb, len), arg, len);
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err = l2down_raw(l2, skb);
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if (err)
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dev_kfree_skb(skb);
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return err;
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}
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static int
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ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) {
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struct sk_buff *nskb = skb;
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int ret = -EAGAIN;
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if (test_bit(FLG_L1_NOTREADY, &l2->flag)) {
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if (hh->id == l2->down_id) {
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nskb = skb_dequeue(&l2->down_queue);
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if (nskb) {
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l2->down_id = mISDN_HEAD_ID(nskb);
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if (l2down_skb(l2, nskb)) {
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dev_kfree_skb(nskb);
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l2->down_id = MISDN_ID_NONE;
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}
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} else
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l2->down_id = MISDN_ID_NONE;
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if (ret) {
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dev_kfree_skb(skb);
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ret = 0;
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}
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if (l2->down_id == MISDN_ID_NONE) {
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test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
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mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL);
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}
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}
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}
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if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) {
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nskb = skb_dequeue(&l2->down_queue);
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if (nskb) {
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l2->down_id = mISDN_HEAD_ID(nskb);
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if (l2down_skb(l2, nskb)) {
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dev_kfree_skb(nskb);
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l2->down_id = MISDN_ID_NONE;
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test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
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}
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} else
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test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
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}
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return ret;
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}
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static int
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l2mgr(struct layer2 *l2, u_int prim, void *arg) {
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long c = (long)arg;
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printk(KERN_WARNING
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"l2mgr: addr:%x prim %x %c\n", l2->id, prim, (char)c);
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if (test_bit(FLG_LAPD, &l2->flag) &&
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!test_bit(FLG_FIXED_TEI, &l2->flag)) {
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switch (c) {
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case 'C':
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case 'D':
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case 'G':
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case 'H':
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l2_tei(l2, prim, (u_long)arg);
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break;
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}
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}
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return 0;
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}
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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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if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue))
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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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|
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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)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_WINDOW; i++)
|
|
|
|
l2->windowar[i] = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
freewin(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
int i, cnt = 0;
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_WINDOW; i++) {
|
|
|
|
if (l2->windowar[i]) {
|
|
|
|
cnt++;
|
|
|
|
dev_kfree_skb(l2->windowar[i]);
|
|
|
|
l2->windowar[i] = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
ReleaseWin(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
int cnt = freewin(l2);
|
|
|
|
|
|
|
|
if (cnt)
|
|
|
|
printk(KERN_WARNING
|
|
|
|
"isdnl2 freed %d skbuffs in release\n", cnt);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline unsigned int
|
|
|
|
cansend(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
unsigned int p1;
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
p1 = (l2->vs - l2->va) % 128;
|
|
|
|
else
|
|
|
|
p1 = (l2->vs - l2->va) % 8;
|
|
|
|
return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
clear_exception(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
test_and_clear_bit(FLG_REJEXC, &l2->flag);
|
|
|
|
test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
|
|
|
|
clear_peer_busy(l2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
sethdraddr(struct layer2 *l2, u_char *header, int rsp)
|
|
|
|
{
|
|
|
|
u_char *ptr = header;
|
|
|
|
int crbit = rsp;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag)) {
|
|
|
|
if (test_bit(FLG_LAPD_NET, &l2->flag))
|
|
|
|
crbit = !crbit;
|
|
|
|
*ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0);
|
|
|
|
*ptr++ = (l2->tei << 1) | 1;
|
|
|
|
return 2;
|
|
|
|
} else {
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
crbit = !crbit;
|
|
|
|
if (crbit)
|
|
|
|
*ptr++ = l2->addr.B;
|
|
|
|
else
|
|
|
|
*ptr++ = l2->addr.A;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void
|
|
|
|
enqueue_super(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb))
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void
|
|
|
|
enqueue_ui(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_UI_IND, 0);
|
|
|
|
if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb))
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsUI(u_char *data)
|
|
|
|
{
|
|
|
|
return (data[0] & 0xef) == UI;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsUA(u_char *data)
|
|
|
|
{
|
|
|
|
return (data[0] & 0xef) == UA;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsDM(u_char *data)
|
|
|
|
{
|
|
|
|
return (data[0] & 0xef) == DM;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsDISC(u_char *data)
|
|
|
|
{
|
|
|
|
return (data[0] & 0xef) == DISC;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsRR(u_char *data, struct layer2 *l2)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
return data[0] == RR;
|
|
|
|
else
|
|
|
|
return (data[0] & 0xf) == 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsSFrame(u_char *data, struct layer2 *l2)
|
|
|
|
{
|
|
|
|
register u_char d = *data;
|
|
|
|
|
|
|
|
if (!test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
d &= 0xf;
|
|
|
|
return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsSABME(u_char *data, struct layer2 *l2)
|
|
|
|
{
|
|
|
|
u_char d = data[0] & ~0x10;
|
|
|
|
|
|
|
|
return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsREJ(u_char *data, struct layer2 *l2)
|
|
|
|
{
|
|
|
|
return test_bit(FLG_MOD128, &l2->flag) ?
|
|
|
|
data[0] == REJ : (data[0] & 0xf) == REJ;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsFRMR(u_char *data)
|
|
|
|
{
|
|
|
|
return (data[0] & 0xef) == FRMR;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
IsRNR(u_char *data, struct layer2 *l2)
|
|
|
|
{
|
|
|
|
return test_bit(FLG_MOD128, &l2->flag) ?
|
|
|
|
data[0] == RNR : (data[0] & 0xf) == RNR;
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static int
|
2008-07-27 07:54:58 +08:00
|
|
|
iframe_error(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u_int i;
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
|
|
|
|
i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1);
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
if (rsp)
|
|
|
|
return 'L';
|
|
|
|
if (skb->len < i)
|
|
|
|
return 'N';
|
|
|
|
if ((skb->len - i) > l2->maxlen)
|
|
|
|
return 'O';
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static int
|
2008-07-27 07:54:58 +08:00
|
|
|
super_error(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
if (skb->len != l2addrsize(l2) +
|
|
|
|
(test_bit(FLG_MOD128, &l2->flag) ? 2 : 1))
|
|
|
|
return 'N';
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static int
|
2008-07-27 07:54:58 +08:00
|
|
|
unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp)
|
|
|
|
{
|
|
|
|
int rsp = (*skb->data & 0x2) >> 1;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
if (rsp != wantrsp)
|
|
|
|
return 'L';
|
|
|
|
if (skb->len != l2addrsize(l2) + 1)
|
|
|
|
return 'N';
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static int
|
2008-07-27 07:54:58 +08:00
|
|
|
UI_error(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
if (rsp)
|
|
|
|
return 'L';
|
|
|
|
if (skb->len > l2->maxlen + l2addrsize(l2) + 1)
|
|
|
|
return 'O';
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static int
|
2008-07-27 07:54:58 +08:00
|
|
|
FRMR_error(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u_int headers = l2addrsize(l2) + 1;
|
|
|
|
u_char *datap = skb->data + headers;
|
|
|
|
int rsp = *skb->data & 0x2;
|
|
|
|
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
if (!rsp)
|
|
|
|
return 'L';
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
if (skb->len < headers + 5)
|
|
|
|
return 'N';
|
|
|
|
else if (*debug & DEBUG_L2)
|
|
|
|
l2m_debug(&l2->l2m,
|
|
|
|
"FRMR information %2x %2x %2x %2x %2x",
|
|
|
|
datap[0], datap[1], datap[2], datap[3], datap[4]);
|
|
|
|
} else {
|
|
|
|
if (skb->len < headers + 3)
|
|
|
|
return 'N';
|
|
|
|
else if (*debug & DEBUG_L2)
|
|
|
|
l2m_debug(&l2->l2m,
|
|
|
|
"FRMR information %2x %2x %2x",
|
|
|
|
datap[0], datap[1], datap[2]);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int
|
|
|
|
legalnr(struct layer2 *l2, unsigned int nr)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
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 layer2 *l2, unsigned int nr)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
while (l2->va != nr) {
|
|
|
|
l2->va++;
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
l2->va %= 128;
|
|
|
|
else
|
|
|
|
l2->va %= 8;
|
|
|
|
if (l2->windowar[l2->sow]) {
|
|
|
|
skb_trim(l2->windowar[l2->sow], 0);
|
|
|
|
skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]);
|
|
|
|
l2->windowar[l2->sow] = NULL;
|
|
|
|
}
|
|
|
|
l2->sow = (l2->sow + 1) % l2->window;
|
|
|
|
}
|
|
|
|
skb = skb_dequeue(&l2->tmp_queue);
|
|
|
|
while (skb) {
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
skb = skb_dequeue(&l2->tmp_queue);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr)
|
|
|
|
{
|
|
|
|
u_char tmp[MAX_L2HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = sethdraddr(l2, tmp, cr);
|
|
|
|
tmp[i++] = cmd;
|
|
|
|
if (skb)
|
|
|
|
skb_trim(skb, 0);
|
|
|
|
else {
|
|
|
|
skb = mI_alloc_skb(i, GFP_ATOMIC);
|
|
|
|
if (!skb) {
|
|
|
|
printk(KERN_WARNING "%s: can't alloc skbuff\n",
|
|
|
|
__func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
memcpy(skb_put(skb, i), tmp, i);
|
|
|
|
enqueue_super(l2, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
inline u_char
|
|
|
|
get_PollFlag(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return skb->data[l2addrsize(l2)] & 0x10;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline u_char
|
|
|
|
get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u_char PF;
|
|
|
|
|
|
|
|
PF = get_PollFlag(l2, skb);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return PF;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
start_t200(struct layer2 *l2, int i)
|
|
|
|
{
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i);
|
|
|
|
test_and_set_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
restart_t200(struct layer2 *l2, int i)
|
|
|
|
{
|
|
|
|
mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i);
|
|
|
|
test_and_set_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
stop_t200(struct layer2 *l2, int i)
|
|
|
|
{
|
|
|
|
if (test_and_clear_bit(FLG_T200_RUN, &l2->flag))
|
|
|
|
mISDN_FsmDelTimer(&l2->t200, i);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
st5_dl_release_l2l3(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
int pr;
|
|
|
|
|
|
|
|
if (test_and_clear_bit(FLG_PEND_REL, &l2->flag))
|
|
|
|
pr = DL_RELEASE_CNF;
|
|
|
|
else
|
|
|
|
pr = DL_RELEASE_IND;
|
|
|
|
l2up_create(l2, pr, 0, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
lapb_dl_release_l2l3(struct layer2 *l2, int f)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL);
|
|
|
|
l2up_create(l2, f, 0, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
establishlink(struct FsmInst *fi)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
u_char cmd;
|
|
|
|
|
|
|
|
clear_exception(l2);
|
|
|
|
l2->rc = 0;
|
|
|
|
cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10;
|
|
|
|
send_uframe(l2, NULL, cmd, CMD);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 1);
|
|
|
|
restart_t200(l2, 1);
|
|
|
|
test_and_clear_bit(FLG_PEND_REL, &l2->flag);
|
|
|
|
freewin(l2);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_5);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(l2, skb))
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'C');
|
|
|
|
else
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'D');
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(l2, skb))
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'B');
|
|
|
|
else {
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'E');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(l2, skb))
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'B');
|
|
|
|
else
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'E');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_go_st3(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
dev_kfree_skb((struct sk_buff *)arg);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_3);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_3);
|
|
|
|
dev_kfree_skb((struct sk_buff *)arg);
|
|
|
|
l2_tei(l2, MDL_ASSIGN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&l2->ui_queue, skb);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_2);
|
|
|
|
l2_tei(l2, MDL_ASSIGN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_queue_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&l2->ui_queue, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
tx_ui(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u_char header[MAX_L2HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = sethdraddr(l2, header, CMD);
|
|
|
|
if (test_bit(FLG_LAPD_NET, &l2->flag))
|
|
|
|
header[1] = 0xff; /* tei 127 */
|
|
|
|
header[i++] = UI;
|
|
|
|
while ((skb = skb_dequeue(&l2->ui_queue))) {
|
|
|
|
memcpy(skb_push(skb, i), header, i);
|
|
|
|
enqueue_ui(l2, skb);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&l2->ui_queue, skb);
|
|
|
|
tx_ui(l2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_ui(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_pull(skb, l2headersize(l2, 1));
|
|
|
|
/*
|
|
|
|
* in states 1-3 for broadcast
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_UI_IND, 0);
|
|
|
|
l2up(l2, DL_UNITDATA_IND, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_establish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
test_and_clear_bit(FLG_PEND_REL, &l2->flag);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_trim(skb, 0);
|
|
|
|
l2up(l2, DL_RELEASE_CNF, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_pend_rel(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
test_and_set_bit(FLG_PEND_REL, &l2->flag);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_disconnect(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
freewin(l2);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_6);
|
|
|
|
l2->rc = 0;
|
|
|
|
send_uframe(l2, NULL, DISC | 0x10, CMD);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 1);
|
|
|
|
restart_t200(l2, 2);
|
|
|
|
if (skb)
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_start_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
l2->vs = 0;
|
|
|
|
l2->va = 0;
|
|
|
|
l2->vr = 0;
|
|
|
|
l2->sow = 0;
|
|
|
|
clear_exception(l2);
|
|
|
|
send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_7);
|
|
|
|
mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3);
|
|
|
|
skb_trim(skb, 0);
|
|
|
|
l2up(l2, DL_ESTABLISH_IND, skb);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_UP_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_UA(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_send_DM(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_restart_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int est = 0;
|
|
|
|
|
|
|
|
send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP);
|
|
|
|
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'F');
|
|
|
|
|
|
|
|
if (l2->vs != l2->va) {
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
est = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
clear_exception(l2);
|
|
|
|
l2->vs = 0;
|
|
|
|
l2->va = 0;
|
|
|
|
l2->vr = 0;
|
|
|
|
l2->sow = 0;
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_7);
|
|
|
|
stop_t200(l2, 3);
|
|
|
|
mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3);
|
|
|
|
|
|
|
|
if (est)
|
|
|
|
l2up_create(l2, DL_ESTABLISH_IND, 0, NULL);
|
|
|
|
/* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST,
|
|
|
|
* MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED,
|
|
|
|
* 0, NULL, 0);
|
|
|
|
*/
|
|
|
|
if (skb_queue_len(&l2->i_queue) && cansend(l2))
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_stop_multi(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 3);
|
|
|
|
stop_t200(l2, 4);
|
|
|
|
|
|
|
|
send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP);
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
freewin(l2);
|
|
|
|
lapb_dl_release_l2l3(l2, DL_RELEASE_IND);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_connected(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int pr = -1;
|
|
|
|
|
|
|
|
if (!get_PollFlag(l2, skb)) {
|
|
|
|
l2_mdl_error_ua(fi, event, arg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
if (test_and_clear_bit(FLG_PEND_REL, &l2->flag))
|
|
|
|
l2_disconnect(fi, event, NULL);
|
|
|
|
if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) {
|
|
|
|
pr = DL_ESTABLISH_CNF;
|
|
|
|
} else if (l2->vs != l2->va) {
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
pr = DL_ESTABLISH_IND;
|
|
|
|
}
|
|
|
|
stop_t200(l2, 5);
|
|
|
|
l2->vr = 0;
|
|
|
|
l2->vs = 0;
|
|
|
|
l2->va = 0;
|
|
|
|
l2->sow = 0;
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_7);
|
|
|
|
mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4);
|
|
|
|
if (pr != -1)
|
|
|
|
l2up_create(l2, pr, 0, NULL);
|
|
|
|
|
|
|
|
if (skb_queue_len(&l2->i_queue) && cansend(l2))
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_UP_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_released(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!get_PollFlag(l2, skb)) {
|
|
|
|
l2_mdl_error_ua(fi, event, arg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
stop_t200(l2, 6);
|
|
|
|
lapb_dl_release_l2l3(l2, DL_RELEASE_CNF);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_reestablish(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!get_PollFlagFree(l2, skb)) {
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(l2, skb)) {
|
|
|
|
stop_t200(l2, 7);
|
|
|
|
if (!test_bit(FLG_L3_INIT, &l2->flag))
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
l2down_create(l2, PH_DEACTIVATE_REQ,
|
|
|
|
l2_newid(l2), 0, NULL);
|
|
|
|
st5_dl_release_l2l3(l2);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (get_PollFlagFree(l2, skb)) {
|
|
|
|
stop_t200(l2, 8);
|
|
|
|
lapb_dl_release_l2l3(l2, DL_RELEASE_CNF);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-12-13 13:15:17 +08:00
|
|
|
static void
|
2008-07-27 07:54:58 +08:00
|
|
|
enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u_char tmp[MAX_L2HEADER_LEN];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
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);
|
|
|
|
skb = mI_alloc_skb(i, GFP_ATOMIC);
|
|
|
|
if (!skb) {
|
|
|
|
printk(KERN_WARNING
|
|
|
|
"isdnl2 can't alloc sbbuff for enquiry_cr\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
memcpy(skb_put(skb, i), tmp, i);
|
|
|
|
enqueue_super(l2, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
enquiry_response(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_OWN_BUSY, &l2->flag))
|
|
|
|
enquiry_cr(l2, RNR, RSP, 1);
|
|
|
|
else
|
|
|
|
enquiry_cr(l2, RR, RSP, 1);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
inline void
|
|
|
|
transmit_enquiry(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
if (test_bit(FLG_OWN_BUSY, &l2->flag))
|
|
|
|
enquiry_cr(l2, RNR, CMD, 1);
|
|
|
|
else
|
|
|
|
enquiry_cr(l2, RR, CMD, 1);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
start_t200(l2, 9);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
nrerrorrecovery(struct FsmInst *fi)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'J');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
invoke_retransmission(struct layer2 *l2, unsigned int nr)
|
|
|
|
{
|
|
|
|
u_int p1;
|
|
|
|
|
|
|
|
if (l2->vs != nr) {
|
|
|
|
while (l2->vs != nr) {
|
|
|
|
(l2->vs)--;
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag)) {
|
|
|
|
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 (l2->windowar[p1])
|
|
|
|
skb_queue_head(&l2->i_queue, l2->windowar[p1]);
|
|
|
|
else
|
|
|
|
printk(KERN_WARNING
|
|
|
|
"%s: windowar[%d] is NULL\n",
|
|
|
|
__func__, p1);
|
|
|
|
l2->windowar[p1] = NULL;
|
|
|
|
}
|
|
|
|
mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int PollFlag, rsp, typ = RR;
|
|
|
|
unsigned int nr;
|
|
|
|
|
|
|
|
rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(l2));
|
|
|
|
if (IsRNR(skb->data, l2)) {
|
|
|
|
set_peer_busy(l2);
|
|
|
|
typ = RNR;
|
|
|
|
} else
|
|
|
|
clear_peer_busy(l2);
|
|
|
|
if (IsREJ(skb->data, l2))
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
|
|
|
|
if (PollFlag) {
|
|
|
|
if (rsp)
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'A');
|
|
|
|
else
|
|
|
|
enquiry_response(l2);
|
|
|
|
}
|
|
|
|
if (legalnr(l2, nr)) {
|
|
|
|
if (typ == REJ) {
|
|
|
|
setva(l2, nr);
|
|
|
|
invoke_retransmission(l2, nr);
|
|
|
|
stop_t200(l2, 10);
|
|
|
|
if (mISDN_FsmAddTimer(&l2->t203, l2->T203,
|
|
|
|
EV_L2_T203, NULL, 6))
|
|
|
|
l2m_debug(&l2->l2m, "Restart T203 ST7 REJ");
|
|
|
|
} else if ((nr == l2->vs) && (typ == RR)) {
|
|
|
|
setva(l2, nr);
|
|
|
|
stop_t200(l2, 11);
|
|
|
|
mISDN_FsmRestartTimer(&l2->t203, l2->T203,
|
|
|
|
EV_L2_T203, NULL, 7);
|
|
|
|
} else if ((l2->va != nr) || (typ == RNR)) {
|
|
|
|
setva(l2, nr);
|
|
|
|
if (typ != RR)
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 9);
|
|
|
|
restart_t200(l2, 12);
|
|
|
|
}
|
|
|
|
if (skb_queue_len(&l2->i_queue) && (typ == RR))
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
} else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!test_bit(FLG_L3_INIT, &l2->flag))
|
|
|
|
skb_queue_tail(&l2->i_queue, skb);
|
|
|
|
else
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&l2->i_queue, skb);
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_tail(&l2->i_queue, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_iframe(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int PollFlag, i;
|
|
|
|
u_int ns, 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)) {
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
if (PollFlag)
|
|
|
|
enquiry_response(l2);
|
|
|
|
} else {
|
|
|
|
if (l2->vr == ns) {
|
|
|
|
l2->vr++;
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
l2->vr %= 128;
|
|
|
|
else
|
|
|
|
l2->vr %= 8;
|
|
|
|
test_and_clear_bit(FLG_REJEXC, &l2->flag);
|
|
|
|
if (PollFlag)
|
|
|
|
enquiry_response(l2);
|
|
|
|
else
|
|
|
|
test_and_set_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
skb_pull(skb, l2headersize(l2, 0));
|
|
|
|
l2up(l2, DL_DATA_IND, skb);
|
|
|
|
} else {
|
|
|
|
/* n(s)!=v(r) */
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
|
|
|
|
if (PollFlag)
|
|
|
|
enquiry_response(l2);
|
|
|
|
} else {
|
|
|
|
enquiry_cr(l2, REJ, RSP, PollFlag);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (legalnr(l2, nr)) {
|
|
|
|
if (!test_bit(FLG_PEER_BUSY, &l2->flag) &&
|
|
|
|
(fi->state == ST_L2_7)) {
|
|
|
|
if (nr == l2->vs) {
|
|
|
|
stop_t200(l2, 13);
|
|
|
|
mISDN_FsmRestartTimer(&l2->t203, l2->T203,
|
|
|
|
EV_L2_T203, NULL, 7);
|
|
|
|
} else if (nr != l2->va)
|
|
|
|
restart_t200(l2, 14);
|
|
|
|
}
|
|
|
|
setva(l2, nr);
|
|
|
|
} else {
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7))
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag))
|
|
|
|
enquiry_cr(l2, RR, RSP, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_tei(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
u_int info;
|
|
|
|
|
|
|
|
l2->tei = (signed char)(long)arg;
|
|
|
|
set_channel_address(&l2->ch, l2->sapi, l2->tei);
|
|
|
|
info = DL_INFO_L2_CONNECT;
|
|
|
|
l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info);
|
|
|
|
if (fi->state == ST_L2_3) {
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_set_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
} else
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (skb_queue_len(&l2->ui_queue))
|
|
|
|
tx_ui(l2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) &&
|
|
|
|
test_bit(FLG_DCHAN_BUSY, &l2->flag)) {
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9);
|
|
|
|
} else if (l2->rc == l2->N200) {
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'G');
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
l2down_create(l2, PH_DEACTIVATE_REQ,
|
|
|
|
l2_newid(l2), 0, NULL);
|
|
|
|
st5_dl_release_l2l3(l2);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
} else {
|
|
|
|
l2->rc++;
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9);
|
|
|
|
send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ?
|
|
|
|
SABME : SABM) | 0x10, CMD);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) &&
|
|
|
|
test_bit(FLG_DCHAN_BUSY, &l2->flag)) {
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9);
|
|
|
|
} else if (l2->rc == l2->N200) {
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'H');
|
|
|
|
lapb_dl_release_l2l3(l2, DL_RELEASE_CNF);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
} else {
|
|
|
|
l2->rc++;
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200,
|
|
|
|
NULL, 9);
|
|
|
|
send_uframe(l2, NULL, DISC | 0x10, CMD);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) &&
|
|
|
|
test_bit(FLG_DCHAN_BUSY, &l2->flag)) {
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
l2->rc = 0;
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_8);
|
|
|
|
transmit_enquiry(l2);
|
|
|
|
l2->rc++;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) &&
|
|
|
|
test_bit(FLG_DCHAN_BUSY, &l2->flag)) {
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
test_and_clear_bit(FLG_T200_RUN, &l2->flag);
|
|
|
|
if (l2->rc == l2->N200) {
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'I');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
} else {
|
|
|
|
transmit_enquiry(l2);
|
|
|
|
l2->rc++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) &&
|
|
|
|
test_bit(FLG_DCHAN_BUSY, &l2->flag)) {
|
|
|
|
mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_8);
|
|
|
|
transmit_enquiry(l2);
|
|
|
|
l2->rc = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb, *nskb, *oskb;
|
|
|
|
u_char header[MAX_L2HEADER_LEN];
|
|
|
|
u_int i, p1;
|
|
|
|
|
|
|
|
if (!cansend(l2))
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb = skb_dequeue(&l2->i_queue);
|
|
|
|
if (!skb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
|
|
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]);
|
|
|
|
}
|
|
|
|
l2->windowar[p1] = skb;
|
|
|
|
i = sethdraddr(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;
|
|
|
|
}
|
|
|
|
|
|
|
|
nskb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
p1 = skb_headroom(nskb);
|
|
|
|
if (p1 >= i)
|
|
|
|
memcpy(skb_push(nskb, i), header, i);
|
|
|
|
else {
|
|
|
|
printk(KERN_WARNING
|
|
|
|
"isdnl2 pull_iqueue skb header(%d/%d) too short\n", i, p1);
|
|
|
|
oskb = nskb;
|
|
|
|
nskb = mI_alloc_skb(oskb->len + i, GFP_ATOMIC);
|
|
|
|
if (!nskb) {
|
|
|
|
dev_kfree_skb(oskb);
|
|
|
|
printk(KERN_WARNING "%s: no skb mem\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
memcpy(skb_put(nskb, i), header, i);
|
|
|
|
memcpy(skb_put(nskb, oskb->len), oskb->data, oskb->len);
|
|
|
|
dev_kfree_skb(oskb);
|
|
|
|
}
|
|
|
|
l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) {
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 13);
|
|
|
|
mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
int PollFlag, rsp, rnr = 0;
|
|
|
|
unsigned int nr;
|
|
|
|
|
|
|
|
rsp = *skb->data & 0x2;
|
|
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
rsp = !rsp;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(l2));
|
|
|
|
|
|
|
|
if (IsRNR(skb->data, l2)) {
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
if (rsp && PollFlag) {
|
|
|
|
if (legalnr(l2, nr)) {
|
|
|
|
if (rnr) {
|
|
|
|
restart_t200(l2, 15);
|
|
|
|
} else {
|
|
|
|
stop_t200(l2, 16);
|
|
|
|
mISDN_FsmAddTimer(&l2->t203, l2->T203,
|
|
|
|
EV_L2_T203, NULL, 5);
|
|
|
|
setva(l2, nr);
|
|
|
|
}
|
|
|
|
invoke_retransmission(l2, nr);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_7);
|
|
|
|
if (skb_queue_len(&l2->i_queue) && cansend(l2))
|
|
|
|
mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL);
|
|
|
|
} else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
} else {
|
|
|
|
if (!rsp && PollFlag)
|
|
|
|
enquiry_response(l2);
|
|
|
|
if (legalnr(l2, nr))
|
|
|
|
setva(l2, nr);
|
|
|
|
else
|
|
|
|
nrerrorrecovery(fi);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_pull(skb, l2addrsize(l2) + 1);
|
|
|
|
|
|
|
|
if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */
|
|
|
|
(IsUA(skb->data) && (fi->state == ST_L2_7))) {
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, (void *) 'K');
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
l2->tei = GROUP_TEI;
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
l2->tei = GROUP_TEI;
|
|
|
|
l2up_create(l2, DL_RELEASE_IND, 0, NULL);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
freewin(l2);
|
|
|
|
l2->tei = GROUP_TEI;
|
|
|
|
stop_t200(l2, 17);
|
|
|
|
st5_dl_release_l2l3(l2);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
l2->tei = GROUP_TEI;
|
|
|
|
stop_t200(l2, 18);
|
|
|
|
l2up_create(l2, DL_RELEASE_IND, 0, NULL);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_tei_remove(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
freewin(l2);
|
|
|
|
l2->tei = GROUP_TEI;
|
|
|
|
stop_t200(l2, 17);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 19);
|
|
|
|
l2up_create(l2, DL_RELEASE_IND, 0, NULL);
|
|
|
|
/* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST,
|
|
|
|
* MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED,
|
|
|
|
* 0, NULL, 0);
|
|
|
|
*/
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2011-04-03 21:31:06 +08:00
|
|
|
l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2008-07-27 07:54:58 +08:00
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag))
|
|
|
|
l2up(l2, DL_RELEASE_IND, skb);
|
|
|
|
else
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2011-04-03 21:31:06 +08:00
|
|
|
l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2008-07-27 07:54:58 +08:00
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
freewin(l2);
|
|
|
|
stop_t200(l2, 19);
|
|
|
|
st5_dl_release_l2l3(l2);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2011-04-03 21:31:06 +08:00
|
|
|
l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2008-07-27 07:54:58 +08:00
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
stop_t200(l2, 20);
|
|
|
|
l2up(l2, DL_RELEASE_CNF, skb);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2011-04-03 21:31:06 +08:00
|
|
|
l2_persistent_da(struct FsmInst *fi, int event, void *arg)
|
2008-07-27 07:54:58 +08:00
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
freewin(l2);
|
|
|
|
stop_t200(l2, 19);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 19);
|
|
|
|
l2up(l2, DL_RELEASE_IND, skb);
|
|
|
|
mISDN_FsmChangeState(fi, ST_L2_4);
|
|
|
|
if (l2->tm)
|
|
|
|
l2_tei(l2, MDL_STATUS_DOWN_IND, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) {
|
|
|
|
enquiry_cr(l2, RNR, RSP, 0);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
}
|
|
|
|
if (skb)
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
struct sk_buff *skb = arg;
|
|
|
|
|
|
|
|
if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) {
|
|
|
|
enquiry_cr(l2, RR, RSP, 0);
|
|
|
|
test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
|
|
|
|
}
|
|
|
|
if (skb)
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_frame_error(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = fi->userdata;
|
|
|
|
|
|
|
|
l2mgr(l2, MDL_ERROR_IND, arg);
|
|
|
|
establishlink(fi);
|
|
|
|
test_and_clear_bit(FLG_L3_INIT, &l2->flag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct FsmNode L2FnList[] =
|
|
|
|
{
|
|
|
|
{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_UNITDATA, l2_queue_ui_assign},
|
|
|
|
{ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui},
|
|
|
|
{ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui},
|
|
|
|
{ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui},
|
|
|
|
{ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui},
|
|
|
|
{ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui},
|
|
|
|
{ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui},
|
|
|
|
{ST_L2_8, EV_L2_DL_UNITDATA, 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},
|
2011-04-03 21:31:06 +08:00
|
|
|
{ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
|
2008-07-27 07:54:58 +08:00
|
|
|
{ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
|
|
|
|
{ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
|
2011-04-03 21:31:06 +08:00
|
|
|
{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},
|
2008-07-27 07:54:58 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static int
|
|
|
|
ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u_char *datap = skb->data;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
int psapi, ptei;
|
|
|
|
u_int l;
|
|
|
|
int c = 0;
|
|
|
|
|
|
|
|
l = l2addrsize(l2);
|
|
|
|
if (skb->len <= l) {
|
|
|
|
mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N');
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */
|
|
|
|
psapi = *datap++;
|
|
|
|
ptei = *datap++;
|
|
|
|
if ((psapi & 1) || !(ptei & 1)) {
|
|
|
|
printk(KERN_WARNING
|
|
|
|
"l2 D-channel frame wrong EA0/EA1\n");
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
psapi >>= 2;
|
|
|
|
ptei >>= 1;
|
|
|
|
if (psapi != l2->sapi) {
|
2011-03-31 09:57:33 +08:00
|
|
|
/* not our business */
|
2009-05-22 19:04:51 +08:00
|
|
|
if (*debug & DEBUG_L2)
|
|
|
|
printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n",
|
|
|
|
__func__, psapi, l2->sapi);
|
2008-07-27 07:54:58 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if ((ptei != l2->tei) && (ptei != GROUP_TEI)) {
|
2011-03-31 09:57:33 +08:00
|
|
|
/* not our business */
|
2009-05-22 19:04:51 +08:00
|
|
|
if (*debug & DEBUG_L2)
|
|
|
|
printk(KERN_DEBUG "%s: tei %d/%d mismatch\n",
|
|
|
|
__func__, ptei, l2->tei);
|
2008-07-27 07:54:58 +08:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
datap += l;
|
|
|
|
if (!(*datap & 1)) { /* I-Frame */
|
|
|
|
c = iframe_error(l2, skb);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb);
|
|
|
|
} else if (IsSFrame(datap, l2)) { /* S-Frame */
|
|
|
|
c = super_error(l2, skb);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb);
|
|
|
|
} else if (IsUI(datap)) {
|
|
|
|
c = UI_error(l2, skb);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb);
|
|
|
|
} else if (IsSABME(datap, l2)) {
|
|
|
|
c = unnum_error(l2, skb, CMD);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb);
|
|
|
|
} else if (IsUA(datap)) {
|
|
|
|
c = unnum_error(l2, skb, RSP);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb);
|
|
|
|
} else if (IsDISC(datap)) {
|
|
|
|
c = unnum_error(l2, skb, CMD);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb);
|
|
|
|
} else if (IsDM(datap)) {
|
|
|
|
c = unnum_error(l2, skb, RSP);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb);
|
|
|
|
} else if (IsFRMR(datap)) {
|
|
|
|
c = FRMR_error(l2, skb);
|
|
|
|
if (!c)
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb);
|
|
|
|
} else
|
|
|
|
c = 'L';
|
|
|
|
if (c) {
|
|
|
|
printk(KERN_WARNING "l2 D-channel frame error %c\n", c);
|
|
|
|
mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
l2_send(struct mISDNchannel *ch, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = container_of(ch, struct layer2, ch);
|
|
|
|
struct mISDNhead *hh = mISDN_HEAD_P(skb);
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
if (*debug & DEBUG_L2_RECV)
|
2009-05-22 19:04:51 +08:00
|
|
|
printk(KERN_DEBUG "%s: prim(%x) id(%x) sapi(%d) tei(%d)\n",
|
|
|
|
__func__, hh->prim, hh->id, l2->sapi, l2->tei);
|
2008-07-27 07:54:58 +08:00
|
|
|
switch (hh->prim) {
|
|
|
|
case PH_DATA_IND:
|
|
|
|
ret = ph_data_indication(l2, hh, skb);
|
|
|
|
break;
|
|
|
|
case PH_DATA_CNF:
|
|
|
|
ret = ph_data_confirm(l2, hh, skb);
|
|
|
|
break;
|
|
|
|
case PH_ACTIVATE_IND:
|
|
|
|
test_and_set_bit(FLG_L1_ACTIV, &l2->flag);
|
|
|
|
l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL);
|
|
|
|
if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag))
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m,
|
|
|
|
EV_L2_DL_ESTABLISH_REQ, skb);
|
|
|
|
break;
|
|
|
|
case PH_DEACTIVATE_IND:
|
|
|
|
test_and_clear_bit(FLG_L1_ACTIV, &l2->flag);
|
|
|
|
l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL);
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb);
|
|
|
|
break;
|
|
|
|
case MPH_INFORMATION_IND:
|
|
|
|
if (!l2->up)
|
|
|
|
break;
|
|
|
|
ret = l2->up->send(l2->up, skb);
|
|
|
|
break;
|
|
|
|
case DL_DATA_REQ:
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb);
|
|
|
|
break;
|
|
|
|
case DL_UNITDATA_REQ:
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb);
|
|
|
|
break;
|
|
|
|
case DL_ESTABLISH_REQ:
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
test_and_set_bit(FLG_ORIG, &l2->flag);
|
|
|
|
if (test_bit(FLG_L1_ACTIV, &l2->flag)) {
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) ||
|
|
|
|
test_bit(FLG_ORIG, &l2->flag))
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m,
|
|
|
|
EV_L2_DL_ESTABLISH_REQ, skb);
|
|
|
|
} else {
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag) ||
|
|
|
|
test_bit(FLG_ORIG, &l2->flag)) {
|
|
|
|
test_and_set_bit(FLG_ESTAB_PEND,
|
|
|
|
&l2->flag);
|
|
|
|
}
|
|
|
|
ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2),
|
|
|
|
skb);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case DL_RELEASE_REQ:
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag))
|
|
|
|
l2down_create(l2, PH_DEACTIVATE_REQ,
|
|
|
|
l2_newid(l2), 0, NULL);
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ,
|
|
|
|
skb);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (*debug & DEBUG_L2)
|
|
|
|
l2m_debug(&l2->l2m, "l2 unknown pr %04x",
|
|
|
|
hh->prim);
|
|
|
|
}
|
|
|
|
if (ret) {
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
tei_l2(struct layer2 *l2, u_int cmd, u_long arg)
|
|
|
|
{
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
if (*debug & DEBUG_L2_TEI)
|
|
|
|
printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
|
|
|
|
switch (cmd) {
|
|
|
|
case (MDL_ASSIGN_REQ):
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg);
|
|
|
|
break;
|
|
|
|
case (MDL_REMOVE_REQ):
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL);
|
|
|
|
break;
|
|
|
|
case (MDL_ERROR_IND):
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL);
|
|
|
|
break;
|
|
|
|
case (MDL_ERROR_RSP):
|
|
|
|
/* ETS 300-125 5.3.2.1 Test: TC13010 */
|
|
|
|
printk(KERN_NOTICE "MDL_ERROR|REQ (tei_l2)\n");
|
|
|
|
ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
release_l2(struct layer2 *l2)
|
|
|
|
{
|
|
|
|
mISDN_FsmDelTimer(&l2->t200, 21);
|
|
|
|
mISDN_FsmDelTimer(&l2->t203, 16);
|
|
|
|
skb_queue_purge(&l2->i_queue);
|
|
|
|
skb_queue_purge(&l2->ui_queue);
|
|
|
|
skb_queue_purge(&l2->down_queue);
|
|
|
|
ReleaseWin(l2);
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag)) {
|
2008-07-28 00:32:50 +08:00
|
|
|
TEIrelease(l2);
|
2008-07-27 07:54:58 +08:00
|
|
|
if (l2->ch.st)
|
|
|
|
l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D,
|
|
|
|
CLOSE_CHANNEL, NULL);
|
|
|
|
}
|
|
|
|
kfree(l2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
|
|
|
|
{
|
|
|
|
struct layer2 *l2 = container_of(ch, struct layer2, ch);
|
|
|
|
u_int info;
|
|
|
|
|
|
|
|
if (*debug & DEBUG_L2_CTRL)
|
|
|
|
printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd);
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case OPEN_CHANNEL:
|
|
|
|
if (test_bit(FLG_LAPD, &l2->flag)) {
|
|
|
|
set_channel_address(&l2->ch, l2->sapi, l2->tei);
|
|
|
|
info = DL_INFO_L2_CONNECT;
|
|
|
|
l2up_create(l2, DL_INFORMATION_IND,
|
|
|
|
sizeof(info), &info);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CLOSE_CHANNEL:
|
|
|
|
if (l2->ch.peer)
|
|
|
|
l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL);
|
|
|
|
release_l2(l2);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct layer2 *
|
2009-05-25 15:50:02 +08:00
|
|
|
create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei,
|
|
|
|
int sapi)
|
2008-07-27 07:54:58 +08:00
|
|
|
{
|
|
|
|
struct layer2 *l2;
|
|
|
|
struct channel_req rq;
|
|
|
|
|
|
|
|
l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL);
|
|
|
|
if (!l2) {
|
|
|
|
printk(KERN_ERR "kzalloc layer2 failed\n");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
l2->next_id = 1;
|
|
|
|
l2->down_id = MISDN_ID_NONE;
|
|
|
|
l2->up = ch;
|
|
|
|
l2->ch.st = ch->st;
|
|
|
|
l2->ch.send = l2_send;
|
|
|
|
l2->ch.ctrl = l2_ctrl;
|
|
|
|
switch (protocol) {
|
|
|
|
case ISDN_P_LAPD_NT:
|
|
|
|
test_and_set_bit(FLG_LAPD, &l2->flag);
|
|
|
|
test_and_set_bit(FLG_LAPD_NET, &l2->flag);
|
|
|
|
test_and_set_bit(FLG_MOD128, &l2->flag);
|
2009-05-25 15:50:02 +08:00
|
|
|
l2->sapi = sapi;
|
2008-07-27 07:54:58 +08:00
|
|
|
l2->maxlen = MAX_DFRAME_LEN;
|
|
|
|
if (test_bit(OPTION_L2_PMX, &options))
|
|
|
|
l2->window = 7;
|
|
|
|
else
|
|
|
|
l2->window = 1;
|
|
|
|
if (test_bit(OPTION_L2_PTP, &options))
|
|
|
|
test_and_set_bit(FLG_PTP, &l2->flag);
|
|
|
|
if (test_bit(OPTION_L2_FIXEDTEI, &options))
|
|
|
|
test_and_set_bit(FLG_FIXED_TEI, &l2->flag);
|
2009-05-25 15:50:02 +08:00
|
|
|
l2->tei = tei;
|
2008-07-27 07:54:58 +08:00
|
|
|
l2->T200 = 1000;
|
|
|
|
l2->N200 = 3;
|
|
|
|
l2->T203 = 10000;
|
|
|
|
if (test_bit(OPTION_L2_PMX, &options))
|
|
|
|
rq.protocol = ISDN_P_NT_E1;
|
|
|
|
else
|
|
|
|
rq.protocol = ISDN_P_NT_S0;
|
|
|
|
rq.adr.channel = 0;
|
|
|
|
l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq);
|
|
|
|
break;
|
|
|
|
case ISDN_P_LAPD_TE:
|
|
|
|
test_and_set_bit(FLG_LAPD, &l2->flag);
|
|
|
|
test_and_set_bit(FLG_MOD128, &l2->flag);
|
|
|
|
test_and_set_bit(FLG_ORIG, &l2->flag);
|
2009-05-25 15:50:02 +08:00
|
|
|
l2->sapi = sapi;
|
2008-07-27 07:54:58 +08:00
|
|
|
l2->maxlen = MAX_DFRAME_LEN;
|
|
|
|
if (test_bit(OPTION_L2_PMX, &options))
|
|
|
|
l2->window = 7;
|
|
|
|
else
|
|
|
|
l2->window = 1;
|
|
|
|
if (test_bit(OPTION_L2_PTP, &options))
|
|
|
|
test_and_set_bit(FLG_PTP, &l2->flag);
|
|
|
|
if (test_bit(OPTION_L2_FIXEDTEI, &options))
|
|
|
|
test_and_set_bit(FLG_FIXED_TEI, &l2->flag);
|
2009-05-25 15:50:02 +08:00
|
|
|
l2->tei = tei;
|
2008-07-27 07:54:58 +08:00
|
|
|
l2->T200 = 1000;
|
|
|
|
l2->N200 = 3;
|
|
|
|
l2->T203 = 10000;
|
|
|
|
if (test_bit(OPTION_L2_PMX, &options))
|
|
|
|
rq.protocol = ISDN_P_TE_E1;
|
|
|
|
else
|
|
|
|
rq.protocol = ISDN_P_TE_S0;
|
|
|
|
rq.adr.channel = 0;
|
|
|
|
l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq);
|
|
|
|
break;
|
|
|
|
case ISDN_P_B_X75SLP:
|
|
|
|
test_and_set_bit(FLG_LAPB, &l2->flag);
|
|
|
|
l2->window = 7;
|
|
|
|
l2->maxlen = MAX_DATA_SIZE;
|
|
|
|
l2->T200 = 1000;
|
|
|
|
l2->N200 = 4;
|
|
|
|
l2->T203 = 5000;
|
|
|
|
l2->addr.A = 3;
|
|
|
|
l2->addr.B = 1;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printk(KERN_ERR "layer2 create failed prt %x\n",
|
|
|
|
protocol);
|
|
|
|
kfree(l2);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
skb_queue_head_init(&l2->i_queue);
|
|
|
|
skb_queue_head_init(&l2->ui_queue);
|
|
|
|
skb_queue_head_init(&l2->down_queue);
|
|
|
|
skb_queue_head_init(&l2->tmp_queue);
|
|
|
|
InitWin(l2);
|
|
|
|
l2->l2m.fsm = &l2fsm;
|
|
|
|
if (test_bit(FLG_LAPB, &l2->flag) ||
|
|
|
|
test_bit(FLG_PTP, &l2->flag) ||
|
|
|
|
test_bit(FLG_LAPD_NET, &l2->flag))
|
|
|
|
l2->l2m.state = ST_L2_4;
|
|
|
|
else
|
|
|
|
l2->l2m.state = ST_L2_1;
|
|
|
|
l2->l2m.debug = *debug;
|
|
|
|
l2->l2m.userdata = l2;
|
|
|
|
l2->l2m.userint = 0;
|
|
|
|
l2->l2m.printdebug = l2m_debug;
|
|
|
|
|
|
|
|
mISDN_FsmInitTimer(&l2->l2m, &l2->t200);
|
|
|
|
mISDN_FsmInitTimer(&l2->l2m, &l2->t203);
|
|
|
|
return l2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
x75create(struct channel_req *crq)
|
|
|
|
{
|
|
|
|
struct layer2 *l2;
|
|
|
|
|
|
|
|
if (crq->protocol != ISDN_P_B_X75SLP)
|
|
|
|
return -EPROTONOSUPPORT;
|
2009-05-25 15:50:02 +08:00
|
|
|
l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0);
|
2008-07-27 07:54:58 +08:00
|
|
|
if (!l2)
|
|
|
|
return -ENOMEM;
|
|
|
|
crq->ch = &l2->ch;
|
|
|
|
crq->protocol = ISDN_P_B_HDLC;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct Bprotocol X75SLP = {
|
|
|
|
.Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)),
|
|
|
|
.name = "X75SLP",
|
|
|
|
.create = x75create
|
|
|
|
};
|
|
|
|
|
|
|
|
int
|
|
|
|
Isdnl2_Init(u_int *deb)
|
|
|
|
{
|
|
|
|
debug = deb;
|
|
|
|
mISDN_register_Bprotocol(&X75SLP);
|
|
|
|
l2fsm.state_count = L2_STATE_COUNT;
|
|
|
|
l2fsm.event_count = L2_EVENT_COUNT;
|
|
|
|
l2fsm.strEvent = strL2Event;
|
|
|
|
l2fsm.strState = strL2State;
|
|
|
|
mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));
|
|
|
|
TEIInit(deb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
Isdnl2_cleanup(void)
|
|
|
|
{
|
|
|
|
mISDN_unregister_Bprotocol(&X75SLP);
|
|
|
|
TEIFree();
|
|
|
|
mISDN_FsmFree(&l2fsm);
|
|
|
|
}
|
|
|
|
|