Release 4.14 drivers/isdn/hisax/tei.c

Directory: drivers/isdn/hisax
/* $Id: tei.c,v 2.20.2.3 2004/01/13 14:31:26 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 "hisax.h"
#include "isdnl2.h"
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/random.h>


const char *tei_revision = "$Revision: 2.20.2.3 $";


#define ID_REQUEST	1

#define ID_ASSIGNED	2

#define ID_DENIED	3

#define ID_CHK_REQ	4

#define ID_CHK_RES	5

#define ID_REMOVE	6

#define ID_VERIFY	7


#define TEI_ENTITY_ID	0xf


static struct Fsm teifsm;

void tei_handler(struct PStack *st, u_char pr, struct sk_buff *skb);

enum {
	
ST_TEI_NOP,
	
ST_TEI_IDREQ,
	
ST_TEI_IDVERIFY,
};


#define TEI_STATE_COUNT (ST_TEI_IDVERIFY + 1)


static char *strTeiState[] =
{
	"ST_TEI_NOP",
	"ST_TEI_IDREQ",
	"ST_TEI_IDVERIFY",
};

enum {
	
EV_IDREQ,
	
EV_ASSIGN,
	
EV_DENIED,
	
EV_CHKREQ,
	
EV_REMOVE,
	
EV_VERIFY,
	
EV_T202,
};


#define TEI_EVENT_COUNT (EV_T202 + 1)


static char *strTeiEvent[] =
{
	"EV_IDREQ",
	"EV_ASSIGN",
	"EV_DENIED",
	"EV_CHKREQ",
	"EV_REMOVE",
	"EV_VERIFY",
	"EV_T202",
};


static unsigned int

random_ri(void)
{
	unsigned int x;

	get_random_bytes(&x, sizeof(x));
	return (x & 0xffff);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 30 96.77% 2 66.67%
Adrian Bunk 1 3.23% 1 33.33%
Total 31 100.00% 3 100.00%


static struct PStack *

findtei(struct PStack *st, int tei)
{
	struct PStack *ptr = *(st->l1.stlistp);

	if (tei == 127)
		return (NULL);

	while (ptr)
		if (ptr->l2.tei == tei)
			return (ptr);
		else
			ptr = ptr->next;
	return (NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%


static void

put_tei_msg(struct PStack *st, u_char m_id, unsigned int ri, u_char tei)
{
	struct sk_buff *skb;
	u_char *bp;

	if (!(skb = alloc_skb(8, GFP_ATOMIC))) {
		printk(KERN_WARNING "HiSax: No skb for TEI manager\n");
		return;
	}
	bp = skb_put(skb, 3);
	bp[0] = (TEI_SAPI << 2);
	bp[1] = (GROUP_TEI << 1) | 0x1;
	bp[2] = UI;
	bp = skb_put(skb, 5);
	bp[0] = TEI_ENTITY_ID;
	bp[1] = ri >> 8;
	bp[2] = ri & 0xff;
	bp[3] = m_id;
	bp[4] = (tei << 1) | 1;
	st->l2.l2l1(st, PH_DATA | REQUEST, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 154 95.06% 4 80.00%
Andrew Morton 8 4.94% 1 20.00%
Total 162 100.00% 5 100.00%


static void

tei_id_request(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;

	if (st->l2.tei != -1) {
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"assign request for already assigned tei %d",
					st->l2.tei);
		return;
	}
	st->ma.ri = random_ri();
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"assign request ri %d", st->ma.ri);
	put_tei_msg(st, ID_REQUEST, st->ma.ri, 127);
	FsmChangeState(&st->ma.tei_m, ST_TEI_IDREQ);
	FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 1);
	st->ma.N202 = 3;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 162 99.39% 3 75.00%
Masanari Iida 1 0.61% 1 25.00%
Total 163 100.00% 4 100.00%


static void

tei_id_assign(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *ost, *st = fi->userdata;
	struct sk_buff *skb = arg;
	struct IsdnCardState *cs;
	int ri, tei;

	ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
	tei = skb->data[4] >> 1;
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"identity assign ri %d tei %d", ri, tei);
	if ((ost = findtei(st, tei))) {	/* same tei is in use */
		if (ri != ost->ma.ri) {
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"possible duplicate assignment tei %d", tei);
			ost->l2.l2tei(ost, MDL_ERROR | RESPONSE, NULL);
		}
	} else if (ri == st->ma.ri) {
		FsmDelTimer(&st->ma.t202, 1);
		FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
		st->l3.l3l2(st, MDL_ASSIGN | REQUEST, (void *) (long) tei);
		cs = (struct IsdnCardState *) st->l1.hardware;
		cs->cardmsg(cs, MDL_ASSIGN | REQUEST, NULL);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 246 94.62% 3 75.00%
Andrew Morton 14 5.38% 1 25.00%
Total 260 100.00% 4 100.00%


static void

tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *ost, *st = fi->userdata;
	struct sk_buff *skb = arg;
	int tei, ri;

	ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
	tei = skb->data[4] >> 1;
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"foreign identity assign ri %d tei %d", ri, tei);
	if ((ost = findtei(st, tei))) {	/* same tei is in use */
		if (ri != ost->ma.ri) {	/* and it wasn't our request */
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"possible duplicate assignment tei %d", tei);
			FsmEvent(&ost->ma.tei_m, EV_VERIFY, NULL);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 170 100.00% 3 100.00%
Total 170 100.00% 3 100.00%


static void

tei_id_denied(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;
	struct sk_buff *skb = arg;
	int ri, tei;

	ri = ((unsigned int) skb->data[1] << 8) + skb->data[2];
	tei = skb->data[4] >> 1;
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"identity denied ri %d tei %d", ri, tei);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 104 100.00% 4 100.00%
Total 104 100.00% 4 100.00%


static void

tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;
	struct sk_buff *skb = arg;
	int tei;

	tei = skb->data[4] >> 1;
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"identity check req tei %d", tei);
	if ((st->l2.tei != -1) && ((tei == GROUP_TEI) || (tei == st->l2.tei))) {
		FsmDelTimer(&st->ma.t202, 4);
		FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
		put_tei_msg(st, ID_CHK_RES, random_ri(), st->l2.tei);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 149 100.00% 3 100.00%
Total 149 100.00% 3 100.00%


static void

tei_id_remove(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;
	struct sk_buff *skb = arg;
	struct IsdnCardState *cs;
	int tei;

	tei = skb->data[4] >> 1;
	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"identity remove tei %d", tei);
	if ((st->l2.tei != -1) && ((tei == GROUP_TEI) || (tei == st->l2.tei))) {
		FsmDelTimer(&st->ma.t202, 5);
		FsmChangeState(&st->ma.tei_m, ST_TEI_NOP);
		st->l3.l3l2(st, MDL_REMOVE | REQUEST, NULL);
		cs = (struct IsdnCardState *) st->l1.hardware;
		cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 164 91.62% 3 60.00%
Andrew Morton 14 7.82% 1 20.00%
Al Viro 1 0.56% 1 20.00%
Total 179 100.00% 5 100.00%


static void

tei_id_verify(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;

	if (st->ma.debug)
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"id verify request for tei %d", st->l2.tei);
	put_tei_msg(st, ID_VERIFY, 0, st->l2.tei);
	FsmChangeState(&st->ma.tei_m, ST_TEI_IDVERIFY);
	FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 2);
	st->ma.N202 = 2;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 116 100.00% 3 100.00%
Total 116 100.00% 3 100.00%


static void

tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;
	struct IsdnCardState *cs;

	if (--st->ma.N202) {
		st->ma.ri = random_ri();
		if (st->ma.debug)
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"assign req(%d) ri %d", 4 - st->ma.N202,
						st->ma.ri);
		put_tei_msg(st, ID_REQUEST, st->ma.ri, 127);
		FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 3);
	} else {
		st->ma.tei_m.printdebug(&st->ma.tei_m, "assign req failed");
		st->l3.l3l2(st, MDL_ERROR | RESPONSE, NULL);
		cs = (struct IsdnCardState *) st->l1.hardware;
		cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
		FsmChangeState(fi, ST_TEI_NOP);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 183 92.42% 4 66.67%
Andrew Morton 14 7.07% 1 16.67%
Al Viro 1 0.51% 1 16.67%
Total 198 100.00% 6 100.00%


static void

tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
{
	struct PStack *st = fi->userdata;
	struct IsdnCardState *cs;

	if (--st->ma.N202) {
		if (st->ma.debug)
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"id verify req(%d) for tei %d",
						3 - st->ma.N202, st->l2.tei);
		put_tei_msg(st, ID_VERIFY, 0, st->l2.tei);
		FsmAddTimer(&st->ma.t202, st->ma.T202, EV_T202, NULL, 4);
	} else {
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"verify req for tei %d failed", st->l2.tei);
		st->l3.l3l2(st, MDL_REMOVE | REQUEST, NULL);
		cs = (struct IsdnCardState *) st->l1.hardware;
		cs->cardmsg(cs, MDL_REMOVE | REQUEST, NULL);
		FsmChangeState(fi, ST_TEI_NOP);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 180 92.31% 3 60.00%
Andrew Morton 14 7.18% 1 20.00%
Al Viro 1 0.51% 1 20.00%
Total 195 100.00% 5 100.00%


static void

tei_l1l2(struct PStack *st, int pr, void *arg)
{
	struct sk_buff *skb = arg;
	int mt;

	if (test_bit(FLG_FIXED_TEI, &st->l2.flag)) {
		dev_kfree_skb(skb);
		return;
	}

	if (pr == (PH_DATA | INDICATION)) {
		if (skb->len < 3) {
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"short mgr frame %ld/3", skb->len);
		} else if ((skb->data[0] != ((TEI_SAPI << 2) | 2)) ||
			   (skb->data[1] != ((GROUP_TEI << 1) | 1))) {
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"wrong mgr sapi/tei %x/%x",
						skb->data[0], skb->data[1]);
		} else if ((skb->data[2] & 0xef) != UI) {
			st->ma.tei_m.printdebug(&st->ma.tei_m,
						"mgr frame is not ui %x", skb->data[2]);
		} else {
			skb_pull(skb, 3);
			if (skb->len < 5) {
				st->ma.tei_m.printdebug(&st->ma.tei_m,
							"short mgr frame %ld/5", skb->len);
			} else if (skb->data[0] != TEI_ENTITY_ID) {
				/* wrong management entity identifier, ignore */
				st->ma.tei_m.printdebug(&st->ma.tei_m,
							"tei handler wrong entity id %x",
							skb->data[0]);
			} else {
				mt = skb->data[3];
				if (mt == ID_ASSIGNED)
					FsmEvent(&st->ma.tei_m, EV_ASSIGN, skb);
				else if (mt == ID_DENIED)
					FsmEvent(&st->ma.tei_m, EV_DENIED, skb);
				else if (mt == ID_CHK_REQ)
					FsmEvent(&st->ma.tei_m, EV_CHKREQ, skb);
				else if (mt == ID_REMOVE)
					FsmEvent(&st->ma.tei_m, EV_REMOVE, skb);
				else {
					st->ma.tei_m.printdebug(&st->ma.tei_m,
								"tei handler wrong mt %x\n", mt);
				}
			}
		}
	} else {
		st->ma.tei_m.printdebug(&st->ma.tei_m,
					"tei handler wrong pr %x\n", pr);
	}
	dev_kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 440 100.00% 5 100.00%
Total 440 100.00% 5 100.00%


static void

tei_l2tei(struct PStack *st, int pr, void *arg)
{
	struct IsdnCardState *cs;

	if (test_bit(FLG_FIXED_TEI, &st->l2.flag)) {
		if (pr == (MDL_ASSIGN | INDICATION)) {
			if (st->ma.debug)
				st->ma.tei_m.printdebug(&st->ma.tei_m,
							"fixed assign tei %d", st->l2.tei);
			st->l3.l3l2(st, MDL_ASSIGN | REQUEST, (void *) (long) st->l2.tei);
			cs = (struct IsdnCardState *) st->l1.hardware;
			cs->cardmsg(cs, MDL_ASSIGN | REQUEST, NULL);
		}
		return;
	}
	switch (pr) {
	case (MDL_ASSIGN | INDICATION):
		FsmEvent(&st->ma.tei_m, EV_IDREQ, arg);
		break;
	case (MDL_ERROR | REQUEST):
		FsmEvent(&st->ma.tei_m, EV_VERIFY, arg);
		break;
	default:
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 174 92.55% 3 75.00%
Andrew Morton 14 7.45% 1 25.00%
Total 188 100.00% 4 100.00%


static void

tei_debug(struct FsmInst *fi, char *fmt, ...)
{
	va_list args;
	struct PStack *st = fi->userdata;

	va_start(args, fmt);
	VHiSax_putstatus(st->l1.hardware, "tei ", fmt, args);
	va_end(args);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 56 100.00% 3 100.00%
Total 56 100.00% 3 100.00%


void

setstack_tei(struct PStack *st)
{
	st->l2.l2tei = tei_l2tei;
	st->ma.T202 = 2000;	/* T202  2000 milliseconds */
	st->l1.l1tei = tei_l1l2;
	st->ma.debug = 1;
	st->ma.tei_m.fsm = &teifsm;
	st->ma.tei_m.state = ST_TEI_NOP;
	st->ma.tei_m.debug = 1;
	st->ma.tei_m.userdata = st;
	st->ma.tei_m.userint = 0;
	st->ma.tei_m.printdebug = tei_debug;
	FsmInitTimer(&st->ma.tei_m, &st->ma.t202);
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 121 100.00% 2 100.00%
Total 121 100.00% 2 100.00%


void

init_tei(struct IsdnCardState *cs, int protocol)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 12 100.00% 3 100.00%
Total 12 100.00% 3 100.00%


void

release_tei(struct IsdnCardState *cs)
{
	struct PStack *st = cs->stlist;

	while (st) {
		FsmDelTimer(&st->ma.t202, 1);
		st = st->next;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 43 100.00% 2 100.00%
Total 43 100.00% 2 100.00%


static struct FsmNode TeiFnList[] __initdata =
{
	{ST_TEI_NOP, EV_IDREQ, tei_id_request},
	{ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
	{ST_TEI_NOP, EV_VERIFY, tei_id_verify},
	{ST_TEI_NOP, EV_REMOVE, tei_id_remove},
	{ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
	{ST_TEI_IDREQ, EV_T202, tei_id_req_tout},
	{ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
	{ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
	{ST_TEI_IDVERIFY, EV_T202, tei_id_ver_tout},
	{ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
	{ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
};


int __init

TeiNew(void)
{
	teifsm.state_count = TEI_STATE_COUNT;
	teifsm.event_count = TEI_EVENT_COUNT;
	teifsm.strEvent = strTeiEvent;
	teifsm.strState = strTeiState;
	return FsmNew(&teifsm, TeiFnList, ARRAY_SIZE(TeiFnList));
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 39 84.78% 3 60.00%
Karsten Keil 4 8.70% 1 20.00%
Linus Torvalds 3 6.52% 1 20.00%
Total 46 100.00% 5 100.00%


void

TeiFree(void)
{
	FsmFree(&teifsm);
}
Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 13 100.00% 2 100.00%
Total 13 100.00% 2 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 2864 96.69% 8 50.00%
Andrew Morton 80 2.70% 1 6.25%
Karsten Keil 4 0.14% 1 6.25%
Linus Torvalds 3 0.10% 1 6.25%
Joe Perches 3 0.10% 1 6.25%
Tejun Heo 3 0.10% 1 6.25%
Al Viro 3 0.10% 1 6.25%
Masanari Iida 1 0.03% 1 6.25%
Adrian Bunk 1 0.03% 1 6.25%
Total 2962 100.00% 16 100.00%
Directory: drivers/isdn/hisax

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
Linus Torvalds (pre-git)	30	96.77%	2	66.67%
Adrian Bunk	1	3.23%	1	33.33%
Total	31	100.00%	3	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 drivers/isdn/hisax/tei.c

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