capidrv.c

讲述linux的初始化过程

				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,
				cmd.parm.setup.si2,
				cmd.parm.setup.eazmsn);
			capi_fill_ALERT_REQ(cmsg,
					    global.appid,
					    card->msgid++,
					    plcip->plci,	/* adr */
					    0,	/* BChannelinformation */
					    0,	/* Keypadfacility */
					    0,	/* Useruserdata */
					    0	/* Facilitydataarray */
			);
			plcip->msgid = cmsg->Messagenumber;
			send_message(card, cmsg);
		} else {
			printk(KERN_INFO "capidrv-%d: incoming call %s,%d,%d,%s on netdev\n",
				card->contrnr,
				cmd.parm.setup.phone,
				cmd.parm.setup.si1,
				cmd.parm.setup.si2,
				cmd.parm.setup.eazmsn);
		}
		break;

	case 2:		/* Call will be rejected. */
		capi_cmsg_answer(cmsg);
		cmsg->Reject = 2;	/* reject call, normal call clearing */
		send_message(card, cmsg);
		plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT);
		break;

	default:
		/* An error happened. (Invalid parameters for example.) */
		capi_cmsg_answer(cmsg);
		cmsg->Reject = 8;	/* reject call,
					   destination out of order */
		send_message(card, cmsg);
		plci_change_state(card, plcip, EV_PLCI_CONNECT_REJECT);
		break;
	}
	return;
}

static void handle_plci(_cmsg * cmsg)
{
	capidrv_contr *card = findcontrbynumber(cmsg->adr.adrController & 0x7f);
	capidrv_plci *plcip;
	isdn_ctrl cmd;

	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_DISCONNECT_IND:	/* plci */
		if (cmsg->Reason) {
			printk(KERN_INFO "capidrv-%d: %s reason 0x%x (%s) for plci 0x%x\n",
			   card->contrnr,
			   capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			       cmsg->Reason, capi_info2str(cmsg->Reason), cmsg->adr.adrPLCI);
		}
		if (!(plcip = find_plci_by_plci(card, cmsg->adr.adrPLCI))) {
			capi_cmsg_answer(cmsg);
			send_message(card, cmsg);
			goto notfound;
		}
		card->bchans[plcip->chan].disconnecting = 1;
		plci_change_state(card, plcip, EV_PLCI_DISCONNECT_IND);
		capi_cmsg_answer(cmsg);
		send_message(card, cmsg);
		plci_change_state(card, plcip, EV_PLCI_DISCONNECT_RESP);
		break;

	case CAPI_DISCONNECT_CONF:	/* plci */
		if (cmsg->Info) {
			printk(KERN_INFO "capidrv-%d: %s info 0x%x (%s) for plci 0x%x\n",
			   card->contrnr,
			   capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			       cmsg->Info, capi_info2str(cmsg->Info), 
			       cmsg->adr.adrPLCI);
		}
		if (!(plcip = find_plci_by_plci(card, cmsg->adr.adrPLCI)))
			goto notfound;

		card->bchans[plcip->chan].disconnecting = 1;
		break;

	case CAPI_ALERT_CONF:	/* plci */
		if (cmsg->Info) {
			printk(KERN_INFO "capidrv-%d: %s info 0x%x (%s) for plci 0x%x\n",
			   card->contrnr,
			   capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			       cmsg->Info, capi_info2str(cmsg->Info), 
			       cmsg->adr.adrPLCI);
		}
		break;

	case CAPI_CONNECT_IND:	/* plci */
		handle_incoming_call(card, cmsg);
		break;

	case CAPI_CONNECT_CONF:	/* plci */
		if (cmsg->Info) {
			printk(KERN_INFO "capidrv-%d: %s info 0x%x (%s) for plci 0x%x\n",
			   card->contrnr,
			   capi_cmd2str(cmsg->Command, cmsg->Subcommand),
			       cmsg->Info, capi_info2str(cmsg->Info), 
			       cmsg->adr.adrPLCI);
		}
		if (!(plcip = find_plci_by_msgid(card, cmsg->Messagenumber)))
			goto notfound;

		plcip->plci = cmsg->adr.adrPLCI;
		if (cmsg->Info) {
			plci_change_state(card, plcip, EV_PLCI_CONNECT_CONF_ERROR);
		} else {
			plci_change_state(card, plcip, EV_PLCI_CONNECT_CONF_OK);
		}
		break;

	case CAPI_CONNECT_ACTIVE_IND:	/* plci */

		if (!(plcip = find_plci_by_plci(card, cmsg->adr.adrPLCI)))
			goto notfound;

		if (card->bchans[plcip->chan].incoming) {
			capi_cmsg_answer(cmsg);
			send_message(card, cmsg);
			plci_change_state(card, plcip, EV_PLCI_CONNECT_ACTIVE_IND);
		} else {
			capidrv_ncci *nccip;
			capi_cmsg_answer(cmsg);
			send_message(card, cmsg);

			nccip = new_ncci(card, plcip, cmsg->adr.adrPLCI);

			if (!nccip) {
				printk(KERN_ERR "capidrv-%d: no mem for ncci, sorry\n", card->contrnr);
				break;	/* $$$$ */
			}
			capi_fill_CONNECT_B3_REQ(cmsg,
						 global.appid,
						 card->msgid++,
						 plcip->plci,	/* adr */
						 0	/* NCPI */
			);
			nccip->msgid = cmsg->Messagenumber;
			send_message(card, cmsg);
			cmd.command = ISDN_STAT_DCONN;
			cmd.driver = card->myid;
			cmd.arg = plcip->chan;
			card->interface.statcallb(&cmd);
			plci_change_state(card, plcip, EV_PLCI_CONNECT_ACTIVE_IND);
			ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_REQ);
		}
		break;

	case CAPI_INFO_IND:	/* Controller/plci */

		if (!(plcip = find_plci_by_plci(card, cmsg->adr.adrPLCI)))
			goto notfound;

		if (cmsg->InfoNumber == 0x4000) {
			if (cmsg->InfoElement[0] == 4) {
				cmd.command = ISDN_STAT_CINF;
				cmd.driver = card->myid;
				cmd.arg = plcip->chan;
				sprintf(cmd.parm.num, "%lu",
					(unsigned long)
					((__u32) cmsg->InfoElement[1]
				  | ((__u32) (cmsg->InfoElement[2]) << 8)
				 | ((__u32) (cmsg->InfoElement[3]) << 16)
					 | ((__u32) (cmsg->InfoElement[4]) << 24)));
				card->interface.statcallb(&cmd);
				break;
			}
		}
		printk(KERN_ERR "capidrv-%d: %s\n",
				card->contrnr, capi_cmsg2str(cmsg));
		break;

	case CAPI_CONNECT_ACTIVE_CONF:		/* plci */
		goto ignored;
	case CAPI_SELECT_B_PROTOCOL_CONF:	/* plci */
		goto ignored;
	case CAPI_FACILITY_IND:	/* Controller/plci/ncci */
		goto ignored;
	case CAPI_FACILITY_CONF:	/* Controller/plci/ncci */
		goto ignored;

	case CAPI_INFO_CONF:	/* Controller/plci */
		goto ignored;

	default:
		printk(KERN_ERR "capidrv-%d: got %s for plci 0x%x ???",
		       card->contrnr,
		       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
		       cmsg->adr.adrPLCI);
	}
	return;
      ignored:
	printk(KERN_INFO "capidrv-%d: %s for plci 0x%x ignored\n",
	       card->contrnr,
	       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
	       cmsg->adr.adrPLCI);
	return;
      notfound:
	printk(KERN_ERR "capidrv-%d: %s: plci 0x%x not found\n",
	       card->contrnr,
	       capi_cmd2str(cmsg->Command, cmsg->Subcommand),
	       cmsg->adr.adrPLCI);
	return;
}

static void handle_ncci(_cmsg * cmsg)
{
	capidrv_contr *card = findcontrbynumber(cmsg->adr.adrController & 0x7f);
	capidrv_plci *plcip;
	capidrv_ncci *nccip;
	isdn_ctrl cmd;
	int len;

	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_CONNECT_B3_ACTIVE_IND:	/* ncci */
		if (!(nccip = find_ncci(card, cmsg->adr.adrNCCI)))
			goto notfound;

		capi_cmsg_answer(cmsg);
		send_message(card, cmsg);
		ncci_change_state(card, nccip, EV_NCCI_CONNECT_B3_ACTIVE_IND);

		cmd.command = ISDN_STAT_BCONN;
		cmd.driver = card->myid;
		cmd.arg = nccip->chan;
		card->interface.statcallb(&cmd);

		printk(KERN_INFO "capidrv-%d: chan %d up with ncci 0x%x\n",