capidrv.c

是关于linux2.5.1的完全源码

{
	struct ncci_datahandle_queue *n, **pp;

	n = (struct ncci_datahandle_queue *)
		kmalloc(sizeof(struct ncci_datahandle_queue), GFP_ATOMIC);
	if (!n) {
	   printk(KERN_ERR "capidrv: kmalloc ncci_datahandle failed\n");
	   return -1;
	}
	n->next = 0;
	n->datahandle = datahandle;
	n->len = len;
	for (pp = &nccip->ackqueue; *pp; pp = &(*pp)->next) ;
	*pp = n;
	return 0;
}

static int capidrv_del_ack(struct capidrv_ncci *nccip, __u16 datahandle)
{
	struct ncci_datahandle_queue **pp, *p;
	int len;

	for (pp = &nccip->ackqueue; *pp; pp = &(*pp)->next) {
 		if ((*pp)->datahandle == datahandle) {
			p = *pp;
			len = p->len;
			*pp = (*pp)->next;
		        kfree(p);
			return len;
		}
	}
	return -1;
}

/* -------- convert and send capi message ---------------------------- */

static void send_message(capidrv_contr * card, _cmsg * cmsg)
{
	struct sk_buff *skb;
	size_t len;
	capi_cmsg2message(cmsg, cmsg->buf);
	len = CAPIMSG_LEN(cmsg->buf);
	skb = alloc_skb(len, GFP_ATOMIC);
	memcpy(skb_put(skb, len), cmsg->buf, len);
	(*capifuncs->capi_put_message) (global.appid, skb);
	global.nsentctlpkt++;
}

/* -------- state machine -------------------------------------------- */

struct listenstatechange {
	int actstate;
	int nextstate;
	int event;
};

static struct listenstatechange listentable[] =
{
  {ST_LISTEN_NONE, ST_LISTEN_WAIT_CONF, EV_LISTEN_REQ},
  {ST_LISTEN_ACTIVE, ST_LISTEN_ACTIVE_WAIT_CONF, EV_LISTEN_REQ},
  {ST_LISTEN_WAIT_CONF, ST_LISTEN_NONE, EV_LISTEN_CONF_ERROR},
  {ST_LISTEN_ACTIVE_WAIT_CONF, ST_LISTEN_ACTIVE, EV_LISTEN_CONF_ERROR},
  {ST_LISTEN_WAIT_CONF, ST_LISTEN_NONE, EV_LISTEN_CONF_EMPTY},
  {ST_LISTEN_ACTIVE_WAIT_CONF, ST_LISTEN_NONE, EV_LISTEN_CONF_EMPTY},
  {ST_LISTEN_WAIT_CONF, ST_LISTEN_ACTIVE, EV_LISTEN_CONF_OK},
  {ST_LISTEN_ACTIVE_WAIT_CONF, ST_LISTEN_ACTIVE, EV_LISTEN_CONF_OK},
  {},
};

static void listen_change_state(capidrv_contr * card, int event)
{
	struct listenstatechange *p = listentable;
	while (p->event) {
		if (card->state == p->actstate && p->event == event) {
			if (debugmode)
				printk(KERN_DEBUG "capidrv-%d: listen_change_state %d -> %d\n",
				       card->contrnr, card->state, p->nextstate);
			card->state = p->nextstate;
			return;
		}
		p++;
	}
	printk(KERN_ERR "capidrv-%d: listen_change_state state=%d event=%d ????\n",
	       card->contrnr, card->state, event);

}

/* ------------------------------------------------------------------ */

static void p0(capidrv_contr * card, capidrv_plci * plci)
{
	isdn_ctrl cmd;

	card->bchans[plci->chan].contr = 0;
	cmd.command = ISDN_STAT_DHUP;
	cmd.driver = card->myid;
	cmd.arg = plci->chan;
	card->interface.statcallb(&cmd);
	free_plci(card, plci);
}

/* ------------------------------------------------------------------ */

struct plcistatechange {
	int actstate;
	int nextstate;
	int event;
	void (*changefunc) (capidrv_contr * card, capidrv_plci * plci);
};

static struct plcistatechange plcitable[] =
{
  /* P-0 */
  {ST_PLCI_NONE, ST_PLCI_OUTGOING, EV_PLCI_CONNECT_REQ, 0},
  {ST_PLCI_NONE, ST_PLCI_ALLOCATED, EV_PLCI_FACILITY_IND_UP, 0},
  {ST_PLCI_NONE, ST_PLCI_INCOMING, EV_PLCI_CONNECT_IND, 0},
  {ST_PLCI_NONE, ST_PLCI_RESUMEING, EV_PLCI_RESUME_REQ, 0},
  /* P-0.1 */
  {ST_PLCI_OUTGOING, ST_PLCI_NONE, EV_PLCI_CONNECT_CONF_ERROR, p0},
  {ST_PLCI_OUTGOING, ST_PLCI_ALLOCATED, EV_PLCI_CONNECT_CONF_OK, 0},
  /* P-1 */
  {ST_PLCI_ALLOCATED, ST_PLCI_ACTIVE, EV_PLCI_CONNECT_ACTIVE_IND, 0},
  {ST_PLCI_ALLOCATED, ST_PLCI_DISCONNECTING, EV_PLCI_DISCONNECT_REQ, 0},
  {ST_PLCI_ALLOCATED, ST_PLCI_DISCONNECTING, EV_PLCI_FACILITY_IND_DOWN, 0},
  {ST_PLCI_ALLOCATED, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  /* P-ACT */
  {ST_PLCI_ACTIVE, ST_PLCI_DISCONNECTING, EV_PLCI_DISCONNECT_REQ, 0},
  {ST_PLCI_ACTIVE, ST_PLCI_DISCONNECTING, EV_PLCI_FACILITY_IND_DOWN, 0},
  {ST_PLCI_ACTIVE, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  {ST_PLCI_ACTIVE, ST_PLCI_HELD, EV_PLCI_HOLD_IND, 0},
  {ST_PLCI_ACTIVE, ST_PLCI_DISCONNECTING, EV_PLCI_SUSPEND_IND, 0},
  /* P-2 */
  {ST_PLCI_INCOMING, ST_PLCI_DISCONNECTING, EV_PLCI_CONNECT_REJECT, 0},
  {ST_PLCI_INCOMING, ST_PLCI_FACILITY_IND, EV_PLCI_FACILITY_IND_UP, 0},
  {ST_PLCI_INCOMING, ST_PLCI_ACCEPTING, EV_PLCI_CONNECT_RESP, 0},
  {ST_PLCI_INCOMING, ST_PLCI_DISCONNECTING, EV_PLCI_DISCONNECT_REQ, 0},
  {ST_PLCI_INCOMING, ST_PLCI_DISCONNECTING, EV_PLCI_FACILITY_IND_DOWN, 0},
  {ST_PLCI_INCOMING, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  {ST_PLCI_INCOMING, ST_PLCI_DISCONNECTING, EV_PLCI_CD_IND, 0},
  /* P-3 */
  {ST_PLCI_FACILITY_IND, ST_PLCI_DISCONNECTING, EV_PLCI_CONNECT_REJECT, 0},
  {ST_PLCI_FACILITY_IND, ST_PLCI_ACCEPTING, EV_PLCI_CONNECT_ACTIVE_IND, 0},
  {ST_PLCI_FACILITY_IND, ST_PLCI_DISCONNECTING, EV_PLCI_DISCONNECT_REQ, 0},
  {ST_PLCI_FACILITY_IND, ST_PLCI_DISCONNECTING, EV_PLCI_FACILITY_IND_DOWN, 0},
  {ST_PLCI_FACILITY_IND, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  /* P-4 */
  {ST_PLCI_ACCEPTING, ST_PLCI_ACTIVE, EV_PLCI_CONNECT_ACTIVE_IND, 0},
  {ST_PLCI_ACCEPTING, ST_PLCI_DISCONNECTING, EV_PLCI_DISCONNECT_REQ, 0},
  {ST_PLCI_ACCEPTING, ST_PLCI_DISCONNECTING, EV_PLCI_FACILITY_IND_DOWN, 0},
  {ST_PLCI_ACCEPTING, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  /* P-5 */
  {ST_PLCI_DISCONNECTING, ST_PLCI_DISCONNECTED, EV_PLCI_DISCONNECT_IND, 0},
  /* P-6 */
  {ST_PLCI_DISCONNECTED, ST_PLCI_NONE, EV_PLCI_DISCONNECT_RESP, p0},
  /* P-0.Res */
  {ST_PLCI_RESUMEING, ST_PLCI_NONE, EV_PLCI_RESUME_CONF_ERROR, p0},
  {ST_PLCI_RESUMEING, ST_PLCI_RESUME, EV_PLCI_RESUME_CONF_OK, 0},
  /* P-RES */
  {ST_PLCI_RESUME, ST_PLCI_ACTIVE, EV_PLCI_RESUME_IND, 0},
  /* P-HELD */
  {ST_PLCI_HELD, ST_PLCI_ACTIVE, EV_PLCI_RETRIEVE_IND, 0},
  {},
};

static void plci_change_state(capidrv_contr * card, capidrv_plci * plci, int event)
{
	struct plcistatechange *p = plcitable;
	while (p->event) {
		if (plci->state == p->actstate && p->event == event) {
			if (debugmode)
				printk(KERN_DEBUG "capidrv-%d: plci_change_state:0x%x %d -> %d\n",
				  card->contrnr, plci->plci, plci->state, p->nextstate);
			plci->state = p->nextstate;
			if (p->changefunc)
				p->changefunc(card, plci);
			return;
		}
		p++;
	}
	printk(KERN_ERR "capidrv-%d: plci_change_state:0x%x state=%d event=%d ????\n",
	       card->contrnr, plci->plci, plci->state, event);
}

/* ------------------------------------------------------------------ */

static _cmsg cmsg;

static void n0(capidrv_contr * card, capidrv_ncci * ncci)
{
	isdn_ctrl cmd;

	capi_fill_DISCONNECT_REQ(&cmsg,
				 global.appid,
				 card->msgid++,
				 ncci->plcip->plci,
				 0,	/* BChannelinformation */
				 0,	/* Keypadfacility */
				 0,	/* Useruserdata */   /* $$$$ */
				 0	/* Facilitydataarray */
	);
	send_message(card, &cmsg);
	plci_change_state(card, ncci->plcip, EV_PLCI_DISCONNECT_REQ);

	cmd.command = ISDN_STAT_BHUP;
	cmd.driver = card->myid;
	cmd.arg = ncci->chan;
	card->interface.statcallb(&cmd);
	free_ncci(card, ncci);
}

/* ------------------------------------------------------------------ */

struct nccistatechange {
	int actstate;
	int nextstate;
	int event;
	void (*changefunc) (capidrv_contr * card, capidrv_ncci * ncci);
};

static struct nccistatechange nccitable[] =
{
  /* N-0 */
  {ST_NCCI_NONE, ST_NCCI_OUTGOING, EV_NCCI_CONNECT_B3_REQ, 0},
  {ST_NCCI_NONE, ST_NCCI_INCOMING, EV_NCCI_CONNECT_B3_IND, 0},
  /* N-0.1 */
  {ST_NCCI_OUTGOING, ST_NCCI_ALLOCATED, EV_NCCI_CONNECT_B3_CONF_OK, 0},
  {ST_NCCI_OUTGOING, ST_NCCI_NONE, EV_NCCI_CONNECT_B3_CONF_ERROR, n0},
  /* N-1 */
  {ST_NCCI_INCOMING, ST_NCCI_DISCONNECTING, EV_NCCI_CONNECT_B3_REJECT, 0},
  {ST_NCCI_INCOMING, ST_NCCI_ALLOCATED, EV_NCCI_CONNECT_B3_RESP, 0},
  {ST_NCCI_INCOMING, ST_NCCI_DISCONNECTED, EV_NCCI_DISCONNECT_B3_IND, 0},
  {ST_NCCI_INCOMING, ST_NCCI_DISCONNECTING, EV_NCCI_DISCONNECT_B3_REQ, 0},
  /* N-2 */
  {ST_NCCI_ALLOCATED, ST_NCCI_ACTIVE, EV_NCCI_CONNECT_B3_ACTIVE_IND, 0},
  {ST_NCCI_ALLOCATED, ST_NCCI_DISCONNECTED, EV_NCCI_DISCONNECT_B3_IND, 0},
  {ST_NCCI_ALLOCATED, ST_NCCI_DISCONNECTING, EV_NCCI_DISCONNECT_B3_REQ, 0},
  /* N-ACT */
  {ST_NCCI_ACTIVE, ST_NCCI_ACTIVE, EV_NCCI_RESET_B3_IND, 0},
  {ST_NCCI_ACTIVE, ST_NCCI_RESETING, EV_NCCI_RESET_B3_REQ, 0},
  {ST_NCCI_ACTIVE, ST_NCCI_DISCONNECTED, EV_NCCI_DISCONNECT_B3_IND, 0},
  {ST_NCCI_ACTIVE, ST_NCCI_DISCONNECTING, EV_NCCI_DISCONNECT_B3_REQ, 0},
  /* N-3 */
  {ST_NCCI_RESETING, ST_NCCI_ACTIVE, EV_NCCI_RESET_B3_IND, 0},
  {ST_NCCI_RESETING, ST_NCCI_DISCONNECTED, EV_NCCI_DISCONNECT_B3_IND, 0},
  {ST_NCCI_RESETING, ST_NCCI_DISCONNECTING, EV_NCCI_DISCONNECT_B3_REQ, 0},
  /* N-4 */
  {ST_NCCI_DISCONNECTING, ST_NCCI_DISCONNECTED, EV_NCCI_DISCONNECT_B3_IND, 0},
  {ST_NCCI_DISCONNECTING, ST_NCCI_PREVIOUS, EV_NCCI_DISCONNECT_B3_CONF_ERROR,0},
  /* N-5 */
  {ST_NCCI_DISCONNECTED, ST_NCCI_NONE, EV_NCCI_DISCONNECT_B3_RESP, n0},
  {},
};

static void ncci_change_state(capidrv_contr * card, capidrv_ncci * ncci, int event)
{
	struct nccistatechange *p = nccitable;
	while (p->event) {
		if (ncci->state == p->actstate && p->event == event) {
			if (debugmode)
				printk(KERN_DEBUG "capidrv-%d: ncci_change_state:0x%x %d -> %d\n",
				  card->contrnr, ncci->ncci, ncci->state, p->nextstate);
			if (p->nextstate == ST_NCCI_PREVIOUS) {
				ncci->state = ncci->oldstate;
				ncci->oldstate = p->actstate;
			} else {
				ncci->oldstate = p->actstate;
				ncci->state = p->nextstate;
			}
			if (p->changefunc)
				p->changefunc(card, ncci);
			return;
		}
		p++;
	}
	printk(KERN_ERR "capidrv-%d: ncci_change_state:0x%x state=%d event=%d ????\n",
	       card->contrnr, ncci->ncci, ncci->state, event);
}

/* ------------------------------------------------------------------- */

static inline int new_bchan(capidrv_contr * card)
{
	int i;
	for (i = 0; i < card->nbchan; i++) {
		if (card->bchans[i].plcip == 0) {
			card->bchans[i].disconnecting = 0;
			return i;
		}
	}
	return -1;
}

/* ------------------------------------------------------------------- */

static void handle_controller(_cmsg * cmsg)
{
	capidrv_contr *card = findcontrbynumber(cmsg->adr.adrController & 0x7f);

	if (!card) {
		printk(KERN_ERR "capidrv: %s from unknown controller 0x%x\n",
		       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
		       cmsg->adr.adrController & 0x7f);
		return;
	}
	switch (CAPICMD(cmsg->Command, cmsg->Subcommand)) {

	case CAPI_LISTEN_CONF:	/* Controller */
		if (debugmode)
			printk(KERN_DEBUG "capidrv-%d: listenconf Info=0x%4x (%s) cipmask=0x%x\n",
			       card->contrnr, cmsg->Info, capi_info2str(cmsg->Info), card->cipmask);
		if (cmsg->Info) {
			listen_change_state(card, EV_LISTEN_CONF_ERROR);
		} else if (card->cipmask == 0) {
			listen_change_state(card, EV_LISTEN_CONF_EMPTY);
		} else {
			listen_change_state(card, EV_LISTEN_CONF_OK);
		}
		break;

	case CAPI_MANUFACTURER_IND:	/* Controller */
		if (   cmsg->ManuID == 0x214D5641
		    && cmsg->Class == 0
		    && cmsg->Function == 1) {
		   __u8  *data = cmsg->ManuData+3;
		   __u16  len = cmsg->ManuData[0];
		   __u16 layer;
		   int direction;
		   if (len == 255) {
		      len = (cmsg->ManuData[1] | (cmsg->ManuData[2] << 8));
		      data += 2;
		   }
		   len -= 2;
		   layer = ((*(data-1)) << 8) | *(data-2);
		   if (layer & 0x300)
			direction = (layer & 0x200) ? 0 : 1;
		   else direction = (layer & 0x800) ? 0 : 1;
		   if (layer & 0x0C00) {
		   	if ((layer & 0xff) == 0x80) {
		           handle_dtrace_data(card, direction, 1, data, len);
		           break;
		   	}
		   } else if ((layer & 0xff) < 0x80) {
		      handle_dtrace_data(card, direction, 0, data, len);
		      break;
		   }
	           printk(KERN_INFO "capidrv-%d: %s from controller 0x%x layer 0x%x, ignored\n",
                        card->contrnr, 
			capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			cmsg->adr.adrController, layer);
                   break;
		}
		goto ignored;
	case CAPI_MANUFACTURER_CONF:	/* Controller */
		if (cmsg->ManuID == 0x214D5641) {
		   char *s = 0;
		   switch (cmsg->Class) {
		      case 0: break;
		      case 1: s = "unknown class"; break;
		      case 2: s = "unknown function"; break;
		      default: s = "unkown error"; break;
		   }
		   if (s)
	           printk(KERN_INFO "capidrv-%d: %s from controller 0x%x function %d: %s\n",
			card->contrnr,
			capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			cmsg->adr.adrController,
			cmsg->Function, s);
		   break;
		}
		goto ignored;
	case CAPI_FACILITY_IND:	/* Controller/plci/ncci */
		goto ignored;
	case CAPI_FACILITY_CONF:	/* Controller/plci/ncci */
		goto ignored;
	case CAPI_INFO_IND:	/* Controller/plci */
		goto ignored;
	case CAPI_INFO_CONF:	/* Controller/plci */
		goto ignored;

	default:
		printk(KERN_ERR "capidrv-%d: got %s from controller 0x%x ???",
		       card->contrnr,
		       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
		       cmsg->adr.adrController);
	}
	return;

      ignored:
	printk(KERN_INFO "capidrv-%d: %s from controller 0x%x ignored\n",
	       card->contrnr,
	       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
	       cmsg->adr.adrController);
}

static void handle_incoming_call(capidrv_contr * card, _cmsg * cmsg)
{
	capidrv_plci *plcip;
	capidrv_bchan *bchan;
	isdn_ctrl cmd;
	int chan;

	if ((chan = new_bchan(card)) == -1) {
		printk(KERN_ERR "capidrv-%d: incoming call on not existing bchan ?\n", card->contrnr);
		return;
	}
	bchan = &card->bchans[chan];
	if ((plcip = new_plci(card, chan)) == 0) {
		printk(KERN_ERR "capidrv-%d: incoming call: no memory, sorry.\n", card->contrnr);
		return;
	}
	bchan->incoming = 1;
	plcip->plci = cmsg->adr.adrPLCI;
	plci_change_state(card, plcip, EV_PLCI_CONNECT_IND);

	cmd.command = ISDN_STAT_ICALL;
	cmd.driver = card->myid;
	cmd.arg = chan;
	memset(&cmd.parm.setup, 0, sizeof(cmd.parm.setup));
	strncpy(cmd.parm.setup.phone,
	        cmsg->CallingPartyNumber + 3,
		cmsg->CallingPartyNumber[0] - 2);
	strncpy(cmd.parm.setup.eazmsn,
	        cmsg->CalledPartyNumber + 2,
		cmsg->CalledPartyNumber[0] - 1);
	cmd.parm.setup.si1 = cip2si1(cmsg->CIPValue);
	cmd.parm.setup.si2 = cip2si2(cmsg->CIPValue);
	cmd.parm.setup.plan = cmsg->CallingPartyNumber[1];
	cmd.parm.setup.screen = cmsg->CallingPartyNumber[2];

	printk(KERN_INFO "capidrv-%d: incoming call %s,%d,%d,%s\n", 
			card->contrnr,
			cmd.parm.setup.phone,
			cmd.parm.setup.si1,
			cmd.parm.setup.si2,
			cmd.parm.setup.eazmsn);

	if (cmd.parm.setup.si1 == 1 && cmd.parm.setup.si2 != 0) {
		printk(KERN_INFO "capidrv-%d: patching si2=%d to 0 for VBOX\n", 
			card->contrnr,
			cmd.parm.setup.si2);
		cmd.parm.setup.si2 = 0;
	}

	switch (card->interface.statcallb(&cmd)) {
	case 0:
	case 3:
		/* No device matching this call.
		 * and isdn_common.c has send a HANGUP command
		 * which is ignored in state ST_PLCI_INCOMING,
		 * so we send RESP to ignore the call
		 */
		capi_cmsg_answer(cmsg);
		cmsg->Reject = 1;	/* ignore */
		send_message(card, cmsg);
		plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT);
		printk(KERN_INFO "capidrv-%d: incoming call %s,%d,%d,%s ignored\n",
			card->contrnr,
			cmd.parm.setup.phone,
			cmd.parm.setup.si1,
			cmd.parm.setup.si2,
			cmd.parm.setup.eazmsn);
		break;
	case 1:
		/* At least one device matching this call (RING on ttyI)
		 * HL-driver may send ALERTING on the D-channel in this
		 * case.
		 * really means: RING on ttyI or a net interface
		 * accepted this call already.
		 *
		 * If the call was accepted, state has already changed,
		 * and CONNECT_RESP already sent.
		 */
		if (plcip->state == ST_PLCI_INCOMING) {
			printk(KERN_INFO "capidrv-%d: incoming call %s,%d,%d,%s tty alerting\n",
				card->contrnr,
				cmd.parm.setup.phone,
				cmd.parm.setup.si1,