466 строки
11 KiB
C
466 строки
11 KiB
C
/* $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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 asigned 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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void
|
|
init_tei(struct IsdnCardState *cs, int protocol)
|
|
{
|
|
}
|
|
|
|
void
|
|
release_tei(struct IsdnCardState *cs)
|
|
{
|
|
struct PStack *st = cs->stlist;
|
|
|
|
while (st) {
|
|
FsmDelTimer(&st->ma.t202, 1);
|
|
st = st->next;
|
|
}
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
void
|
|
TeiFree(void)
|
|
{
|
|
FsmFree(&teifsm);
|
|
}
|