Release 4.11 drivers/isdn/mISDN/layer2.c

Directory: drivers/isdn/mISDN
/*
 *
 * Author       Karsten Keil <kkeil@novell.com>
 *
 * Copyright 2008  by Karsten Keil <kkeil@novell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/mISDNif.h>
#include <linux/slab.h>
#include "core.h"
#include "fsm.h"
#include "layer2.h"


static u_int *debug;

static

struct Fsm l2fsm = {NULL, 0, 0, NULL, NULL};


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_UNITDATA,
	
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_T200I,
	
EV_L2_T203I,
	
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_UNITDATA",
	"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_T200I",
	"EV_L2_T203I",
	"EV_L2_SET_OWN_BUSY",
	"EV_L2_CLEAR_OWN_BUSY",
	"EV_L2_FRAME_ERROR",
};


static void

l2m_debug(struct FsmInst *fi, char *fmt, ...)
{
	struct layer2 *l2 = fi->userdata;
	struct va_format vaf;
	va_list va;

	if (!(*debug & DEBUG_L2_FSM))
		return;

	va_start(va, fmt);

	vaf.fmt = fmt;
	vaf.va = &va;

	printk(KERN_DEBUG "%s l2 (sapi %d tei %d): %pV\n",
	       mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, &vaf);

	va_end(va);
}

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Total 94 100.00% 4 100.00%


inline u_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);
}

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inline u_int

l2addrsize(struct layer2 *l2)
{
	return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1;
}

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static u_int

l2_newid(struct layer2 *l2)
{
	u_int	id;

	id = l2->next_id++;
	if (id == 0x7fff)
		l2->next_id = 1;
	id <<= 16;
	id |= l2->tei << 8;
	id |= l2->sapi;
	return id;
}

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static void

l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb)
{
	int	err;

	if (!l2->up)
		return;
	mISDN_HEAD_PRIM(skb) = prim;
	mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr;
	err = l2->up->send(l2->up, skb);
	if (err) {
		printk(KERN_WARNING "%s: dev %s err=%d\n", __func__,
		       mISDNDevName4ch(&l2->ch), err);
		dev_kfree_skb(skb);
	}
}

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static void

l2up_create(struct layer2 *l2, u_int prim, int len, void *arg)
{
	struct sk_buff	*skb;
	struct mISDNhead *hh;
	int		err;

	if (!l2->up)
		return;
	skb = mI_alloc_skb(len, GFP_ATOMIC);
	if (!skb)
		return;
	hh = mISDN_HEAD_P(skb);
	hh->prim = prim;
	hh->id = (l2->ch.nr << 16) | l2->ch.addr;
	if (len)
		memcpy(skb_put(skb, len), arg, len);
	err = l2->up->send(l2->up, skb);
	if (err) {
		printk(KERN_WARNING "%s: dev %s err=%d\n", __func__,
		       mISDNDevName4ch(&l2->ch), err);
		dev_kfree_skb(skb);
	}
}

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static int

l2down_skb(struct layer2 *l2, struct sk_buff *skb) {
	int ret;

	ret = l2->ch.recv(l2->ch.peer, skb);
	if (ret && (*debug & DEBUG_L2_RECV))
		printk(KERN_DEBUG "l2down_skb: dev %s ret(%d)\n",
		       mISDNDevName4ch(&l2->ch), ret);
	return ret;
}

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static int

l2down_raw(struct layer2 *l2, struct sk_buff *skb)
{
	struct mISDNhead *hh = mISDN_HEAD_P(skb);

	if (hh->prim == PH_DATA_REQ) {
		if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) {
			skb_queue_tail(&l2->down_queue, skb);
			return 0;
		}
		l2->down_id = mISDN_HEAD_ID(skb);
	}
	return l2down_skb(l2, skb);
}

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static int

l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb)
{
	struct mISDNhead *hh = mISDN_HEAD_P(skb);

	hh->prim = prim;
	hh->id = id;
	return l2down_raw(l2, skb);
}

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static int

l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg)
{
	struct sk_buff	*skb;
	int		err;
	struct mISDNhead *hh;

	skb = mI_alloc_skb(len, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;
	hh = mISDN_HEAD_P(skb);
	hh->prim = prim;
	hh->id = id;
	if (len)
		memcpy(skb_put(skb, len), arg, len);
	err = l2down_raw(l2, skb);
	if (err)
		dev_kfree_skb(skb);
	return err;
}

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static int

ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) {
	struct sk_buff *nskb = skb;
	int ret = -EAGAIN;

	if (test_bit(FLG_L1_NOTREADY, &l2->flag)) {
		if (hh->id == l2->down_id) {
			nskb = skb_dequeue(&l2->down_queue);
			if (nskb) {
				l2->down_id = mISDN_HEAD_ID(nskb);
				if (l2down_skb(l2, nskb)) {
					dev_kfree_skb(nskb);
					l2->down_id = MISDN_ID_NONE;
				}
			} else
				l2->down_id = MISDN_ID_NONE;
			if (ret) {
				dev_kfree_skb(skb);
				ret = 0;
			}
			if (l2->down_id == MISDN_ID_NONE) {
				test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
				mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL);
			}
		}
	}
	if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) {
		nskb = skb_dequeue(&l2->down_queue);
		if (nskb) {
			l2->down_id = mISDN_HEAD_ID(nskb);
			if (l2down_skb(l2, nskb)) {
				dev_kfree_skb(nskb);
				l2->down_id = MISDN_ID_NONE;
				test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
			}
		} else
			test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag);
	}
	return ret;
}

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static void

l2_timeout(struct FsmInst *fi, int event, void *arg)
{
	struct layer2 *l2 = fi->userdata;
	struct sk_buff *skb;
	struct mISDNhead *hh;

	skb = mI_alloc_skb(0, GFP_ATOMIC);
	if (!skb) {
		printk(KERN_WARNING "%s: L2(%d,%d) nr:%x timer %s no skb\n",
		       mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei,
		       l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203");
		return;
	}
	hh = mISDN_HEAD_P(skb);
	hh->prim = event == EV_L2_T200 ? DL_TIMER200_IND : DL_TIMER203_IND;
	hh->id = l2->ch.nr;
	if (*debug & DEBUG_TIMER)
		printk(KERN_DEBUG "%s: L2(%d,%d) nr:%x timer %s expired\n",
		       mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei,
		       l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203");
	if (l2->ch.st)
		l2->ch.st->own.recv(&l2->ch.st->own, skb);
}

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static int

l2mgr(struct layer2 *l2, u_int prim, void *arg) {
	long c = (long)arg;

	printk(KERN_WARNING "l2mgr: dev %s addr:%x prim %x %c\n",
	       mISDNDevName4ch(&l2->ch), l2->id, prim, (char)c);
	if (test_bit(FLG_LAPD, &l2->flag) &&
	    !test_bit(FLG_FIXED_TEI, &l2->flag)) {
		switch (c) {
		case 'C':
		case 'D':
		case 'G':
		case 'H':
			l2_tei(l2, prim, (u_long)arg);
			break;
		}
	}
	return 0;
}

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static void

set_peer_busy(struct layer2 *l2) {
	test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
	if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue))
		test_and_set_bit(FLG_L2BLOCK, &l2->flag);
}

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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);
}

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static void

InitWin(struct layer2 *l2)
{
	int i;

	for (i = 0; i < MAX_WINDOW; i++)
		l2->windowar[i] = NULL;
}

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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;
}

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static void

ReleaseWin(struct layer2 *l2)
{
	int cnt = freewin(l2);

	if (cnt)
		printk(KERN_WARNING
		       "isdnl2 freed %d skbuffs in release\n", cnt);
}

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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);
}

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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);
}

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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;
	}
}

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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);
}

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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);
}

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inline int

IsUI(u_char *data)
{
	return (data[0] & 0xef) == UI;
}

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inline int

IsUA(u_char *data)
{
	return (data[0] & 0xef) == UA;
}

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inline int

IsDM(u_char *data)
{
	return (data[0] & 0xef) == DM;
}

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inline int

IsDISC(u_char *data)
{
	return (data[0] & 0xef) == DISC;
}

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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;
}

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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);
}

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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;
}

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inline int

IsREJ(u_char *data, struct layer2 *l2)
{
	return test_bit(FLG_MOD128, &l2->flag) ?
		data[0] == REJ : (data[0] & 0xf) == REJ;
}

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inline int

IsFRMR(u_char *data)
{
	return (data[0] & 0xef) == FRMR;
}

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inline int

IsRNR(u_char *data, struct layer2 *l2)
{
	return test_bit(FLG_MOD128, &l2->flag) ?
		data[0] == RNR : (data[0] & 0xf) == RNR;
}

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static int

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;
}

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static int

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;
}

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static int

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;
}

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static int

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;
}

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static int

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;
}

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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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 83 100.00% 1 100.00%
Total 83 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 162 100.00% 1 100.00%
Total 162 100.00% 1 100.00%


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 in %s\n",
			       mISDNDevName4ch(&l2->ch), __func__);
			return;
		}
	}
	memcpy(skb_put(skb, i), tmp, i);
	enqueue_super(l2, skb);
}


Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 118 100.00% 2 100.00%
Total 118 100.00% 2 100.00%


inline u_char

get_PollFlag(struct layer2 *l2, struct sk_buff *skb)
{
	return skb->data[l2addrsize(l2)] & 0x10;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%


inline void

stop_t200(struct layer2 *l2, int i)
{
	if (test_and_clear_bit(FLG_T200_RUN, &l2->flag))
		mISDN_FsmDelTimer(&l2->t200, i);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 46 100.00% 1 100.00%
Total 46 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 104 100.00% 1 100.00%
Total 104 100.00% 1 100.00%


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');

}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 87 100.00% 1 100.00%
Total 87 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 85 100.00% 1 100.00%
Total 85 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 101 100.00% 1 100.00%
Total 101 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 71 100.00% 1 100.00%
Total 71 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 67 100.00% 1 100.00%
Total 67 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 62 100.00% 1 100.00%
Total 62 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 50 100.00% 1 100.00%
Total 50 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 99 100.00% 1 100.00%
Total 99 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 137 100.00% 1 100.00%
Total 137 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 195 100.00% 1 100.00%
Total 195 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 111 100.00% 1 100.00%
Total 111 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 244 100.00% 1 100.00%
Total 244 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 97 100.00% 1 100.00%
Total 97 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 61 100.00% 1 100.00%
Total 61 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 128 100.00% 1 100.00%
Total 128 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 81 100.00% 1 100.00%
Total 81 100.00% 1 100.00%


static void

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 "%s: isdnl2 can't alloc sbbuff in %s\n",
		       mISDNDevName4ch(&l2->ch), __func__);
		return;
	}
	memcpy(skb_put(skb, i), tmp, i);
	enqueue_super(l2, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 167 99.40% 2 66.67%
Hannes Eder 1 0.60% 1 33.33%
Total 168 100.00% 3 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%


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);
}


Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 48 100.00% 1 100.00%
Total 48 100.00% 1 100.00%


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",
				       mISDNDevName4ch(&l2->ch), p1);
			l2->windowar[p1] = NULL;
		}
		mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 178 100.00% 2 100.00%
Total 178 100.00% 2 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 432 100.00% 1 100.00%
Total 432 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 487 100.00% 1 100.00%
Total 487 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 126 100.00% 1 100.00%
Total 126 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 221 100.00% 1 100.00%
Total 221 100.00% 1 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 173 100.00% 1 100.00%
Total 173 100.00% 1 100.00%


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++;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 103 100.00% 1 100.00%
Total 103 100.00% 1 100.00%


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++;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 133 100.00% 1 100.00%
Total 133 100.00% 1 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 88 100.00% 1 100.00%
Total 88 100.00% 1 100.00%


static void

l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
{
	struct layer2	*l2 = fi->userdata;
	struct sk_buff	*skb, *nskb;
	u_char		header[MAX_L2HEADER_LEN];
	u_int		i, p1;

	if (!cansend(l2))
		return;

	skb = skb_dequeue(&l2->i_queue);
	if (!skb)
		return;
	i = sethdraddr(l2, header, CMD);
	if (test_bit(FLG_MOD128, &l2->flag)) {
		header[i++] = l2->vs << 1;
		header[i++] = l2->vr << 1;
	} else
		header[i++] = (l2->vr << 5) | (l2->vs << 1);
	nskb = skb_realloc_headroom(skb, i);
	if (!nskb) {
		printk(KERN_WARNING "%s: no headroom(%d) copy for IFrame\n",
		       mISDNDevName4ch(&l2->ch), i);
		skb_queue_head(&l2->i_queue, skb);
		return;
	}
	if (test_bit(FLG_MOD128, &l2->flag)) {
		p1 = (l2->vs - l2->va) % 128;
		l2->vs = (l2->vs + 1) % 128;
	} else {
		p1 = (l2->vs - l2->va) % 8;
		l2->vs = (l2->vs + 1) % 8;
	}
	p1 = (p1 + l2->sow) % l2->window;
	if (l2->windowar[p1]) {
		printk(KERN_WARNING "%s: l2 try overwrite ack queue entry %d\n",
		       mISDNDevName4ch(&l2->ch), p1);
		dev_kfree_skb(l2->windowar[p1]);
	}
	l2->windowar[p1] = skb;
	memcpy(skb_push(nskb, i), header, i);
	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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 400 100.00% 3 100.00%
Total 400 100.00% 3 100.00%


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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 335 100.00% 1 100.00%
Total 335 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 128 100.00% 1 100.00%
Total 128 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 48 100.00% 1 100.00%
Total 48 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 73 100.00% 1 100.00%
Total 73 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 66 100.00% 1 100.00%
Total 66 100.00% 1 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 90 100.00% 1 100.00%
Total 90 100.00% 1 100.00%


static void

l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
{
	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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 76 98.70% 1 50.00%
Jan Engelhardt 1 1.30% 1 50.00%
Total 77 100.00% 2 100.00%


static void

l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
{
	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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 93 98.94% 1 50.00%
Jan Engelhardt 1 1.06% 1 50.00%
Total 94 100.00% 2 100.00%


static void

l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
{
	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);
}

Contributors
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Karsten Keil 79 98.75% 1 50.00%
Jan Engelhardt 1 1.25% 1 50.00%
Total 80 100.00% 2 100.00%


static void

l2_persistent_da(struct FsmInst *fi, int event, void *arg)
{
	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);
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 102 99.03% 1 50.00%
Jan Engelhardt 1 0.97% 1 50.00%
Total 103 100.00% 2 100.00%


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);
}

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Karsten Keil 79 100.00% 1 100.00%
Total 79 100.00% 1 100.00%


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);
}

Contributors
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Karsten Keil 79 100.00% 1 100.00%
Total 79 100.00% 1 100.00%


static void

l2_frame_error(struct FsmInst *fi, int event, void *arg)
{
	struct layer2 *l2 = fi->userdata;

	l2mgr(l2, MDL_ERROR_IND, arg);
}

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Karsten Keil 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%


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);
}

Contributors
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Karsten Keil 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%


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_timeout},
	{ST_L2_6, EV_L2_T200, l2_timeout},
	{ST_L2_7, EV_L2_T200, l2_timeout},
	{ST_L2_8, EV_L2_T200, l2_timeout},
	{ST_L2_7, EV_L2_T203, l2_timeout},
	{ST_L2_5, EV_L2_T200I, l2_st5_tout_200},
	{ST_L2_6, EV_L2_T200I, l2_st6_tout_200},
	{ST_L2_7, EV_L2_T200I, l2_st7_tout_200},
	{ST_L2_8, EV_L2_T200I, l2_st8_tout_200},
	{ST_L2_7, EV_L2_T203I, 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 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
			       "%s l2 D-channel frame wrong EA0/EA1\n",
			       mISDNDevName4ch(&l2->ch));
			return ret;
		}
		psapi >>= 2;
		ptei >>= 1;
		if (psapi != l2->sapi) {
			/* not our business */
			if (*debug & DEBUG_L2)
				printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n",
				       mISDNDevName4ch(&l2->ch), psapi,
				       l2->sapi);
			dev_kfree_skb(skb);
			return 0;
		}
		if ((ptei != l2->tei) && (ptei != GROUP_TEI)) {
			/* not our business */
			if (*debug & DEBUG_L2)
				printk(KERN_DEBUG "%s: tei %d/%d mismatch\n",
				       mISDNDevName4ch(&l2->ch), ptei, l2->tei);
			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 "%s:l2 D-channel frame error %c\n",
		       mISDNDevName4ch(&l2->ch), c);
		mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
	}
	return ret;
}

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Karsten Keil 585 93.30% 2 50.00%
Andreas Eversberg 40 6.38% 1 25.00%
Lucas De Marchi 2 0.32% 1 25.00%
Total 627 100.00% 4 100.00%


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)
		printk(KERN_DEBUG "%s: %s prim(%x) id(%x) sapi(%d) tei(%d)\n",
		       __func__, mISDNDevName4ch(&l2->ch), hh->prim, hh->id,
		       l2->sapi, l2->tei);
	if (hh->prim == DL_INTERN_MSG) {
		struct mISDNhead *chh = hh + 1; /* saved copy */

		*hh = *chh;
		if (*debug & DEBUG_L2_RECV)
			printk(KERN_DEBUG "%s: prim(%x) id(%x) internal msg\n",
				mISDNDevName4ch(&l2->ch), hh->prim, hh->id);
	}
	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;
	case DL_TIMER200_IND:
		mISDN_FsmEvent(&l2->l2m, EV_L2_T200I, NULL);
		break;
	case DL_TIMER203_IND:
		mISDN_FsmEvent(&l2->l2m, EV_L2_T203I, NULL);
		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;
}

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Karsten Keil 575 99.31% 3 75.00%
Andreas Eversberg 4 0.69% 1 25.00%
Total 579 100.00% 4 100.00%


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) in %s\n",
		       mISDNDevName4ch(&l2->ch), cmd, __func__);
	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 "%s: MDL_ERROR|REQ (tei_l2)\n",
		       mISDNDevName4ch(&l2->ch));
		ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL);
		break;
	}
	return ret;
}

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Karsten Keil 155 100.00% 2 100.00%
Total 155 100.00% 2 100.00%


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)) {
		TEIrelease(l2);
		if (l2->ch.st)
			l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D,
					       CLOSE_CHANNEL, NULL);
	}
	kfree(l2);
}

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Total 120 100.00% 2 100.00%


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: %s cmd(%x)\n",
		       mISDNDevName4ch(ch), __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;
}

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Total 156 100.00% 2 100.00%


struct layer2 *

create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei,
	  int sapi)
{
	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);
		l2->sapi = sapi;
		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);
		l2->tei = tei;
		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);
		l2->sapi = sapi;
		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);
		l2->tei = tei;
		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_FIXED_TEI, &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;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 723 98.77% 2 66.67%
Andreas Eversberg 9 1.23% 1 33.33%
Total 732 100.00% 3 100.00%


static int

x75create(struct channel_req *crq)
{
	struct layer2	*l2;

	if (crq->protocol != ISDN_P_B_X75SLP)
		return -EPROTONOSUPPORT;
	l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0);
	if (!l2)
		return -ENOMEM;
	crq->ch = &l2->ch;
	crq->protocol = ISDN_P_B_HDLC;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 72 97.30% 1 50.00%
Andreas Eversberg 2 2.70% 1 50.00%
Total 74 100.00% 2 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 64 100.00% 1 100.00%
Total 64 100.00% 1 100.00%


void

Isdnl2_cleanup(void)
{
	mISDN_unregister_Bprotocol(&X75SLP);
	TEIFree();
	mISDN_FsmFree(&l2fsm);
}
Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Karsten Keil 13326 99.20% 6 40.00%
Andreas Eversberg 59 0.44% 2 13.33%
Joe Perches 20 0.15% 2 13.33%
Hannes Eder 13 0.10% 2 13.33%
Jan Engelhardt 10 0.07% 1 6.67%
Tejun Heo 3 0.02% 1 6.67%
Lucas De Marchi 2 0.01% 1 6.67%
Total 13433 100.00% 15 100.00%
Directory: drivers/isdn/mISDN

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Karsten Keil	71	75.53%	2	50.00%
Joe Perches	19	20.21%	1	25.00%
Andreas Eversberg	4	4.26%	1	25.00%
Total	94	100.00%	4	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/isdn/mISDN/layer2.c

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