c7a7c95e8e
The skb_clone() return value was not checked and the skb_realloc_headroom() usage was wrong, the old skb was not freed. It turned out, that the skb_clone is not needed at all, the skb_realloc_headroom() will create a private copy with enough headroom and the original SKB can be used for the ACK queue. We need to requeue the original skb if the call failed, since the upper layer cannot be informed about memory shortage. Thanks to Insu Yun <wuninsu@gmail.com> to remind me on this issue. Signed-off-by: Karsten Keil <keil@b1-systems.de> Signed-off-by: David S. Miller <davem@davemloft.net>
1840 lines
42 KiB
C
1840 lines
42 KiB
C
/* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 keil Exp $
|
|
*
|
|
* Author Karsten Keil
|
|
* based on the teles driver from Jan den Ouden
|
|
* Copyright by Karsten Keil <keil@isdn4linux.de>
|
|
*
|
|
* This software may be used and distributed according to the terms
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
*
|
|
* For changes and modifications please read
|
|
* Documentation/isdn/HiSax.cert
|
|
*
|
|
* Thanks to Jan den Ouden
|
|
* Fritz Elfert
|
|
*
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/gfp.h>
|
|
#include "hisax.h"
|
|
#include "isdnl2.h"
|
|
|
|
const char *l2_revision = "$Revision: 2.30.2.4 $";
|
|
|
|
static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
|
|
|
|
static struct Fsm l2fsm;
|
|
|
|
enum {
|
|
ST_L2_1,
|
|
ST_L2_2,
|
|
ST_L2_3,
|
|
ST_L2_4,
|
|
ST_L2_5,
|
|
ST_L2_6,
|
|
ST_L2_7,
|
|
ST_L2_8,
|
|
};
|
|
|
|
#define L2_STATE_COUNT (ST_L2_8 + 1)
|
|
|
|
static char *strL2State[] =
|
|
{
|
|
"ST_L2_1",
|
|
"ST_L2_2",
|
|
"ST_L2_3",
|
|
"ST_L2_4",
|
|
"ST_L2_5",
|
|
"ST_L2_6",
|
|
"ST_L2_7",
|
|
"ST_L2_8",
|
|
};
|
|
|
|
enum {
|
|
EV_L2_UI,
|
|
EV_L2_SABME,
|
|
EV_L2_DISC,
|
|
EV_L2_DM,
|
|
EV_L2_UA,
|
|
EV_L2_FRMR,
|
|
EV_L2_SUPER,
|
|
EV_L2_I,
|
|
EV_L2_DL_DATA,
|
|
EV_L2_ACK_PULL,
|
|
EV_L2_DL_UNIT_DATA,
|
|
EV_L2_DL_ESTABLISH_REQ,
|
|
EV_L2_DL_RELEASE_REQ,
|
|
EV_L2_MDL_ASSIGN,
|
|
EV_L2_MDL_REMOVE,
|
|
EV_L2_MDL_ERROR,
|
|
EV_L1_DEACTIVATE,
|
|
EV_L2_T200,
|
|
EV_L2_T203,
|
|
EV_L2_SET_OWN_BUSY,
|
|
EV_L2_CLEAR_OWN_BUSY,
|
|
EV_L2_FRAME_ERROR,
|
|
};
|
|
|
|
#define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1)
|
|
|
|
static char *strL2Event[] =
|
|
{
|
|
"EV_L2_UI",
|
|
"EV_L2_SABME",
|
|
"EV_L2_DISC",
|
|
"EV_L2_DM",
|
|
"EV_L2_UA",
|
|
"EV_L2_FRMR",
|
|
"EV_L2_SUPER",
|
|
"EV_L2_I",
|
|
"EV_L2_DL_DATA",
|
|
"EV_L2_ACK_PULL",
|
|
"EV_L2_DL_UNIT_DATA",
|
|
"EV_L2_DL_ESTABLISH_REQ",
|
|
"EV_L2_DL_RELEASE_REQ",
|
|
"EV_L2_MDL_ASSIGN",
|
|
"EV_L2_MDL_REMOVE",
|
|
"EV_L2_MDL_ERROR",
|
|
"EV_L1_DEACTIVATE",
|
|
"EV_L2_T200",
|
|
"EV_L2_T203",
|
|
"EV_L2_SET_OWN_BUSY",
|
|
"EV_L2_CLEAR_OWN_BUSY",
|
|
"EV_L2_FRAME_ERROR",
|
|
};
|
|
|
|
static int l2addrsize(struct Layer2 *l2);
|
|
|
|
static void
|
|
set_peer_busy(struct Layer2 *l2) {
|
|
test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
|
|
if (!skb_queue_empty(&l2->i_queue) ||
|
|
!skb_queue_empty(&l2->ui_queue))
|
|
test_and_set_bit(FLG_L2BLOCK, &l2->flag);
|
|
}
|
|
|
|
static void
|
|
clear_peer_busy(struct Layer2 *l2) {
|
|
if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
|
|
test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
|
|
}
|
|
|
|
static void
|
|
InitWin(struct Layer2 *l2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_WINDOW; i++)
|
|
l2->windowar[i] = NULL;
|
|
}
|
|
|
|
static int
|
|
freewin1(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 inline void
|
|
freewin(struct PStack *st)
|
|
{
|
|
freewin1(&st->l2);
|
|
}
|
|
|
|
static void
|
|
ReleaseWin(struct Layer2 *l2)
|
|
{
|
|
int cnt;
|
|
|
|
if ((cnt = freewin1(l2)))
|
|
printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
|
|
}
|
|
|
|
static inline unsigned int
|
|
cansend(struct PStack *st)
|
|
{
|
|
unsigned int p1;
|
|
|
|
if (test_bit(FLG_MOD128, &st->l2.flag))
|
|
p1 = (st->l2.vs - st->l2.va) % 128;
|
|
else
|
|
p1 = (st->l2.vs - st->l2.va) % 8;
|
|
return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
|
|
}
|
|
|
|
static 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 inline int
|
|
l2headersize(struct Layer2 *l2, int ui)
|
|
{
|
|
return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
|
|
(test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
|
|
}
|
|
|
|
inline int
|
|
l2addrsize(struct Layer2 *l2)
|
|
{
|
|
return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
|
|
}
|
|
|
|
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)) {
|
|
*ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
|
|
*ptr++ = (l2->tei << 1) | 1;
|
|
return (2);
|
|
} else {
|
|
if (test_bit(FLG_ORIG, &l2->flag))
|
|
crbit = !crbit;
|
|
if (crbit)
|
|
*ptr++ = 1;
|
|
else
|
|
*ptr++ = 3;
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
enqueue_super(struct PStack *st,
|
|
struct sk_buff *skb)
|
|
{
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
st->l1.bcs->tx_cnt += skb->len;
|
|
st->l2.l2l1(st, PH_DATA | REQUEST, skb);
|
|
}
|
|
|
|
#define enqueue_ui(a, b) enqueue_super(a, b)
|
|
|
|
static inline int
|
|
IsUI(u_char *data)
|
|
{
|
|
return ((data[0] & 0xef) == UI);
|
|
}
|
|
|
|
static inline int
|
|
IsUA(u_char *data)
|
|
{
|
|
return ((data[0] & 0xef) == UA);
|
|
}
|
|
|
|
static inline int
|
|
IsDM(u_char *data)
|
|
{
|
|
return ((data[0] & 0xef) == DM);
|
|
}
|
|
|
|
static inline int
|
|
IsDISC(u_char *data)
|
|
{
|
|
return ((data[0] & 0xef) == DISC);
|
|
}
|
|
|
|
static inline int
|
|
IsSFrame(u_char *data, struct PStack *st)
|
|
{
|
|
register u_char d = *data;
|
|
|
|
if (!test_bit(FLG_MOD128, &st->l2.flag))
|
|
d &= 0xf;
|
|
return (((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
|
|
}
|
|
|
|
static inline int
|
|
IsSABME(u_char *data, struct PStack *st)
|
|
{
|
|
u_char d = data[0] & ~0x10;
|
|
|
|
return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
|
|
}
|
|
|
|
static inline int
|
|
IsREJ(u_char *data, struct PStack *st)
|
|
{
|
|
return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
|
|
}
|
|
|
|
static inline int
|
|
IsFRMR(u_char *data)
|
|
{
|
|
return ((data[0] & 0xef) == FRMR);
|
|
}
|
|
|
|
static inline int
|
|
IsRNR(u_char *data, struct PStack *st)
|
|
{
|
|
return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
|
|
}
|
|
|
|
static int
|
|
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;
|
|
}
|
|
|
|
static int
|
|
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;
|
|
}
|
|
|
|
static int
|
|
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;
|
|
}
|
|
|
|
static int
|
|
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;
|
|
}
|
|
|
|
static int
|
|
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",
|
|
datap[0], datap[1], datap[2],
|
|
datap[3], datap[4]);
|
|
} else {
|
|
if (skb->len < headers + 3)
|
|
return 'N';
|
|
else
|
|
l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
|
|
datap[0], datap[1], datap[2]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int
|
|
legalnr(struct PStack *st, unsigned int nr)
|
|
{
|
|
struct Layer2 *l2 = &st->l2;
|
|
|
|
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 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)++;
|
|
if (test_bit(FLG_MOD128, &l2->flag))
|
|
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);
|
|
if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >= 0))
|
|
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;
|
|
}
|
|
memcpy(skb_put(skb, i), tmp, i);
|
|
enqueue_super(st, skb);
|
|
}
|
|
|
|
static inline u_char
|
|
get_PollFlag(struct PStack *st, struct sk_buff *skb)
|
|
{
|
|
return (skb->data[l2addrsize(&(st->l2))] & 0x10);
|
|
}
|
|
|
|
static inline u_char
|
|
get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
|
|
{
|
|
u_char PF;
|
|
|
|
PF = get_PollFlag(st, skb);
|
|
dev_kfree_skb(skb);
|
|
return (PF);
|
|
}
|
|
|
|
static inline void
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
stop_t200(struct PStack *st, int i)
|
|
{
|
|
if (test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
|
|
FsmDelTimer(&st->l2.t200, i);
|
|
}
|
|
|
|
static inline void
|
|
st5_dl_release_l2l3(struct PStack *st)
|
|
{
|
|
int pr;
|
|
|
|
if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
|
|
pr = DL_RELEASE | CONFIRM;
|
|
else
|
|
pr = DL_RELEASE | INDICATION;
|
|
|
|
st->l2.l2l3(st, pr, NULL);
|
|
}
|
|
|
|
static inline void
|
|
lapb_dl_release_l2l3(struct PStack *st, int f)
|
|
{
|
|
if (test_bit(FLG_LAPB, &st->l2.flag))
|
|
st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
|
|
st->l2.l2l3(st, DL_RELEASE | f, NULL);
|
|
}
|
|
|
|
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)
|
|
{
|
|
FsmChangeState(fi, ST_L2_3);
|
|
}
|
|
|
|
static void
|
|
l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
|
|
{
|
|
struct PStack *st = fi->userdata;
|
|
|
|
FsmChangeState(fi, ST_L2_3);
|
|
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);
|
|
|
|
if ((ST_L2_7 == state) || (ST_L2_8 == state))
|
|
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
|
|
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;
|
|
int pr = -1;
|
|
|
|
if (!get_PollFlag(st, skb)) {
|
|
l2_mdl_error_ua(fi, event, arg);
|
|
return;
|
|
}
|
|
dev_kfree_skb(skb);
|
|
|
|
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);
|
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
|
|
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;
|
|
}
|
|
dev_kfree_skb(skb);
|
|
|
|
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);
|
|
if (!test_bit(FLG_L3_INIT, &st->l2.flag))
|
|
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);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
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;
|
|
}
|
|
memcpy(skb_put(skb, i), tmp, i);
|
|
enqueue_super(st, skb);
|
|
}
|
|
|
|
static inline void
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
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)--;
|
|
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 (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;
|
|
}
|
|
dev_kfree_skb(skb);
|
|
|
|
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);
|
|
if (typ != RR) FsmDelTimer(&st->l2.t203, 9);
|
|
restart_t200(st, 12);
|
|
}
|
|
if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
|
|
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
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
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)) {
|
|
dev_kfree_skb(skb);
|
|
if (PollFlag) enquiry_response(st);
|
|
} 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(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) */
|
|
dev_kfree_skb(skb);
|
|
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;
|
|
}
|
|
|
|
if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
|
|
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);
|
|
if (!skb_queue_empty(&st->l2.ui_queue))
|
|
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) &&
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
|
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) &&
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
|
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) &&
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
|
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) &&
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
|
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) &&
|
|
test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
|
|
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;
|
|
struct sk_buff *skb, *nskb;
|
|
struct Layer2 *l2 = &st->l2;
|
|
u_char header[MAX_HEADER_LEN];
|
|
int i, hdr_space_needed;
|
|
int unsigned p1;
|
|
u_long flags;
|
|
|
|
if (!cansend(st))
|
|
return;
|
|
|
|
skb = skb_dequeue(&l2->i_queue);
|
|
if (!skb)
|
|
return;
|
|
|
|
hdr_space_needed = l2headersize(l2, 0);
|
|
nskb = skb_realloc_headroom(skb, hdr_space_needed);
|
|
if (!nskb) {
|
|
skb_queue_head(&l2->i_queue, skb);
|
|
return;
|
|
}
|
|
spin_lock_irqsave(&l2->lock, flags);
|
|
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(&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);
|
|
memcpy(skb_push(nskb, i), header, i);
|
|
st->l2.l2l1(st, PH_PULL | INDICATION, nskb);
|
|
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);
|
|
}
|
|
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
|
|
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;
|
|
}
|
|
dev_kfree_skb(skb);
|
|
|
|
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);
|
|
if (!skb_queue_empty(&l2->i_queue) && cansend(st))
|
|
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);
|
|
}
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
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
|
|
l2_st14_persistent_da(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);
|
|
if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
|
|
st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
|
|
}
|
|
|
|
static void
|
|
l2_st5_persistent_da(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);
|
|
stop_t200(st, 19);
|
|
st5_dl_release_l2l3(st);
|
|
FsmChangeState(fi, ST_L2_4);
|
|
}
|
|
|
|
static void
|
|
l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
|
|
{
|
|
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
|
|
l2_persistent_da(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);
|
|
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;
|
|
|
|
if (!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
|
|
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;
|
|
|
|
if (!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
|
|
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},
|
|
{ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
|
|
{ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
|
|
{ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
|
|
{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},
|
|
};
|
|
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void
|
|
isdnl2_l3l2(struct PStack *st, int pr, void *arg)
|
|
{
|
|
switch (pr) {
|
|
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);
|
|
}
|
|
} 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);
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
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
|
|
st->l2.l2m.state = ST_L2_1;
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
void
|
|
setstack_transl2(struct PStack *st)
|
|
{
|
|
st->l3.l3l2 = transl2_l3l2;
|
|
}
|
|
|
|
void
|
|
releasestack_transl2(struct PStack *st)
|
|
{
|
|
}
|
|
|
|
int __init
|
|
Isdnl2New(void)
|
|
{
|
|
l2fsm.state_count = L2_STATE_COUNT;
|
|
l2fsm.event_count = L2_EVENT_COUNT;
|
|
l2fsm.strEvent = strL2Event;
|
|
l2fsm.strState = strL2State;
|
|
return FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));
|
|
}
|
|
|
|
void
|
|
Isdnl2Free(void)
|
|
{
|
|
FsmFree(&l2fsm);
|
|
}
|