chan_misdn.c

      
			p->state=MISDN_CLEANING;
			misdn_lib_send_event( bc, EVENT_DISCONNECT);
			break;
		case MISDN_CONNECTED:
			/*  Alerting or Disconect */
			chan_misdn_log(2, bc->port, " --> * State Connected\n");
			start_bc_tones(p);
			tone_indicate(p, TONE_BUSY);
			misdn_lib_send_event( bc, EVENT_DISCONNECT);
      
			p->state=MISDN_CLEANING; /* MISDN_HUNGUP_FROM_AST; */
			break;
		case MISDN_DISCONNECTED:
			chan_misdn_log(2, bc->port, " --> * State Disconnected\n");
			misdn_lib_send_event( bc, EVENT_RELEASE);
			p->state=MISDN_CLEANING; /* MISDN_HUNGUP_FROM_AST; */
			break;

		case MISDN_CLEANING:
			break;
      
		case MISDN_HOLD_DISCONNECT:
			/* need to send release here */
			chan_misdn_log(2, bc->port, " --> state HOLD_DISC\n");
			chan_misdn_log(1, bc->port, " --> cause %d\n",bc->cause);
			chan_misdn_log(1, bc->port, " --> out_cause %d\n",bc->out_cause);
			
			bc->out_cause=-1;
			misdn_lib_send_event(bc,EVENT_RELEASE);
			break;
		default:
			/*  Alerting or Disconect */

			if (bc->nt) {
				bc->out_cause=-1;
				misdn_lib_send_event(bc, EVENT_RELEASE);
			} else
				misdn_lib_send_event(bc, EVENT_DISCONNECT);
			p->state=MISDN_CLEANING; /* MISDN_HUNGUP_FROM_AST; */
		}
    
	}
	

	chan_misdn_log(1, bc->port, "Channel: %s hanguped\n",ast->name);
	
	return 0;
}

static struct ast_frame  *misdn_read(struct ast_channel *ast)
{
	struct chan_list *tmp;
	
	char blah[255];
	int len =0 ;
	
	if (!ast) return NULL;
	if (! (tmp=MISDN_ASTERISK_TECH_PVT(ast)) ) return NULL;
	if (!tmp->bc) return NULL;
	
	
	read(tmp->pipe[0],blah,sizeof(blah));
	
	
	len = misdn_ibuf_usedcount(tmp->bc->astbuf);

	if (!len) {
		chan_misdn_log(4,tmp->bc->port,"misdn_read: ZERO READ\n");

		tmp->frame.frametype = AST_FRAME_NULL;
		tmp->frame.subclass = 0;
		return &tmp->frame;
	}

	/*shrinken len if necessary, we transmit at maximum 4k*/
	len = len<=sizeof(tmp->ast_rd_buf)?len:sizeof(tmp->ast_rd_buf);
	
	misdn_ibuf_memcpy_r(tmp->ast_rd_buf, tmp->bc->astbuf,len);
	
	tmp->frame.frametype  = AST_FRAME_VOICE;
	tmp->frame.subclass = AST_FORMAT_ALAW;
	tmp->frame.datalen = len;
	tmp->frame.samples = len ;
	tmp->frame.mallocd =0 ;
	tmp->frame.offset= 0 ;
	tmp->frame.src = NULL;
	tmp->frame.data = tmp->ast_rd_buf ;

	return &tmp->frame;
}




static int misdn_write(struct ast_channel *ast, struct ast_frame *frame)
{
	struct chan_list *ch;
	int i  = 0;
	
	if (!ast || ! (ch=MISDN_ASTERISK_TECH_PVT(ast)) ) return -1;
	
	if (!ch->bc ) {
		ast_log(LOG_WARNING, "private but no bc\n");
		return -1;
	}
	
	/*if (ch->bc->tone != TONE_NONE)
	  tone_indicate(ch,TONE_NONE); */
	
	
	if (ch->holded ) {
		chan_misdn_log(5, ch->bc->port, "misdn_write: Returning because holded\n");
		return 0;
	}
	
	if (ch->notxtone) {
		chan_misdn_log(5, ch->bc->port, "misdn_write: Returning because notxone\n");
		return 0;
	}


	if ( !frame->subclass) {
		chan_misdn_log(4, ch->bc->port, "misdn_write: * prods us\n");
		return 0;
	}
	
	if ( !(frame->subclass & prefformat)) {
		
		chan_misdn_log(-1, ch->bc->port, "Got Unsupported Frame with Format:%d\n", frame->subclass);
		return -1;
	}
	

	if ( !frame->samples ) {
		chan_misdn_log(4, ch->bc->port, "misdn_write: zero write\n");
		return 0;
	}

	if ( ! ch->bc->addr ) {
		chan_misdn_log(8, ch->bc->port, "misdn_write: no addr for bc dropping:%d\n", frame->samples);
		return 0;
	}
	
#if MISDN_DEBUG
	{
		int i, max=5>frame->samples?frame->samples:5;
		
		printf("write2mISDN %p %d bytes: ", p, frame->samples);
		
		for (i=0; i<  max ; i++) printf("%2.2x ",((char*) frame->data)[i]);
		printf ("\n");
	}
#endif


	switch (ch->bc->bc_state) {
		case BCHAN_ACTIVATED:
		case BCHAN_BRIDGED:
			break;
		default:
		chan_misdn_log(5, ch->bc->port, "BC not active (nor bridged) droping: %d frames addr:%x exten:%s cid:%s ch->state:%s\n",frame->samples,ch->bc->addr, ast->exten, ast->cid.cid_num,misdn_get_ch_state( ch));
		return 0;
	}
	
	chan_misdn_log(9, ch->bc->port, "Sending :%d bytes 2 MISDN\n",frame->samples);
	/*if speech flip bits*/
	if ( misdn_cap_is_speech(ch->bc->capability) )
		flip_buf_bits(frame->data,frame->samples);
	
	
	if ( !ch->bc->nojitter && misdn_cap_is_speech(ch->bc->capability) ) {
		/* Buffered Transmit (triggert by read from isdn side)*/
		if (misdn_jb_fill(ch->jb,frame->data,frame->samples) < 0) {
			if (ch->bc->active)
				cb_log(0,ch->bc->port,"Misdn Jitterbuffer Overflow.\n");
		}
		
	} else {
		/*transmit without jitterbuffer*/
		i=misdn_lib_tx2misdn_frm(ch->bc, frame->data, frame->samples);
	}

	
	
	return 0;
}




enum ast_bridge_result  misdn_bridge (struct ast_channel *c0,
				      struct ast_channel *c1, int flags,
				      struct ast_frame **fo,
				      struct ast_channel **rc,
				      int timeoutms)

{
	struct chan_list *ch1,*ch2;
	struct ast_channel *carr[2], *who;
	int to=-1;
	struct ast_frame *f;
  
	ch1=get_chan_by_ast(c0);
	ch2=get_chan_by_ast(c1);

	carr[0]=c0;
	carr[1]=c1;
  
  
	if (ch1 && ch2 ) ;
	else
		return -1;
  

	int bridging;
	misdn_cfg_get( 0, MISDN_GEN_BRIDGING, &bridging, sizeof(int));
	if (bridging) {
		int ecwb;
		misdn_cfg_get( ch1->bc->port, MISDN_CFG_ECHOCANCELWHENBRIDGED, &ecwb, sizeof(int));
		if ( !ecwb ) {
			chan_misdn_log(2, ch1->bc->port, "Disabling Echo Cancellor when Bridged\n");
			ch1->bc->ec_enable=0;
		/*	manager_ec_disable(ch1->bc); */
		}
		misdn_cfg_get( ch2->bc->port, MISDN_CFG_ECHOCANCELWHENBRIDGED, &ecwb, sizeof(int));
		if ( !ecwb ) {
			chan_misdn_log(2, ch2->bc->port, "Disabling Echo Cancellor when Bridged\n");
			ch2->bc->ec_enable=0;
		/*	manager_ec_disable(ch2->bc); */
		}
		
		/* trying to make a mISDN_dsp conference */
		chan_misdn_log(1, ch1->bc->port, "I SEND: Making conference with Number:%d\n", (ch1->bc->pid<<1) +1);

		misdn_lib_bridge(ch1->bc,ch2->bc);
	}
	
	if (option_verbose > 2) 
		ast_verbose(VERBOSE_PREFIX_3 "Native bridging %s and %s\n", c0->name, c1->name);

	chan_misdn_log(1, ch1->bc->port, "* Makeing Native Bridge between %s and %s\n", ch1->bc->oad, ch2->bc->oad);
  
	while(1) {
		to=-1;
		who = ast_waitfor_n(carr, 2, &to);

		if (!who) {
			ast_log(LOG_NOTICE,"misdn_bridge: empty read, breaking out\n");
			break;
		}
		f = ast_read(who);
    
		if (!f || f->frametype == AST_FRAME_CONTROL) {
			/* got hangup .. */
			*fo=f;
			*rc=who;
      
			break;
		}
    
    
		if (who == c0) {
			ast_write(c1,f);
		}
		else {
			ast_write(c0,f);
		}
    
	}
  
	if (bridging) {
		misdn_lib_split_bridge(ch1->bc,ch2->bc);
	}
  
	return 0;
}

/** AST INDICATIONS END **/

static int tone_indicate( struct chan_list *cl, enum tone_e tone)
{
	const struct tone_zone_sound *ts= NULL;
	struct ast_channel *ast=cl->ast;
	
	chan_misdn_log(2,cl->bc->port,"Tone Indicate:\n");
	
	if (!cl->ast) {
		return 0;
	}
	
	switch (tone) {
	case TONE_DIAL:
		chan_misdn_log(2,cl->bc->port," --> Dial\n");
		ts=ast_get_indication_tone(ast->zone,"dial");
		misdn_lib_tone_generator_start(cl->bc);
		break;
	case TONE_ALERTING:
		chan_misdn_log(2,cl->bc->port," --> Ring\n");
		ts=ast_get_indication_tone(ast->zone,"ring");
		misdn_lib_tone_generator_stop(cl->bc);
		break;
	case TONE_BUSY:
		chan_misdn_log(2,cl->bc->port," --> Busy\n");
		ts=ast_get_indication_tone(ast->zone,"busy");
		misdn_lib_tone_generator_stop(cl->bc);
		break;
	case TONE_FILE:
		break;

	case TONE_NONE:
		chan_misdn_log(2,cl->bc->port," --> None\n");
		misdn_lib_tone_generator_stop(cl->bc);
		ast_playtones_stop(ast);
		break;
	default:
		chan_misdn_log(0,cl->bc->port,"Don't know how to handle tone: %d\n",tone);
	}
	
	cl->ts=ts;	
	
	if (ts) ast_playtones_start(ast,0, ts->data, 0);
	
	return 0;
}

static int start_bc_tones(struct chan_list* cl)
{
	manager_bchannel_activate(cl->bc);
	misdn_lib_tone_generator_stop(cl->bc);
	cl->notxtone=0;
	cl->norxtone=0;
	return 0;
}

static int stop_bc_tones(struct chan_list *cl)
{
	if (cl->bc) {
		manager_bchannel_deactivate(cl->bc);
	}
	cl->notxtone=1;
	cl->norxtone=1;
	
	return 0;
}


static struct chan_list *init_chan_list(void)
{
	struct chan_list *cl=malloc(sizeof(struct chan_list));
	
	if (!cl) {
		chan_misdn_log(-1, 0, "misdn_request: malloc failed!");
		return NULL;
	}
	
	memset(cl,0,sizeof(struct chan_list));
	
	return cl;
	
}

static struct ast_channel *misdn_request(const char *type, int format, void *data, int *cause)

{
	struct ast_channel *tmp = NULL;
	char group[BUFFERSIZE+1]="";
	char buf[128];
	char buf2[128], *ext=NULL, *port_str;
	char *tokb=NULL, *p=NULL;
	int channel=0, port=0;
	struct misdn_bchannel *newbc = NULL;
	
	struct chan_list *cl=init_chan_list();
	
	sprintf(buf,"%s/%s",misdn_type,(char*)data);
	ast_copy_string(buf2,data, 128);
	
	port_str=strtok_r(buf2,"/", &tokb);

	ext=strtok_r(NULL,"/", &tokb);

	if (port_str) {
		if (port_str[0]=='g' && port_str[1]==':' ) {
			/* We make a group call lets checkout which ports are in my group */
			port_str += 2;
			strncpy(group, port_str, BUFFERSIZE);
			group[127] = 0;
			chan_misdn_log(2, 0, " --> Group Call group: %s\n",group);
		} 
		else if ((p = strchr(port_str, ':'))) {
			// we have a preselected channel
			*p = 0;
			channel = atoi(++p);
			port = atoi(port_str);
			chan_misdn_log(2, port, " --> Call on preselected Channel (%d).\n", channel);
		}
		else {
			port = atoi(port_str);
		}
		
		
	} else {
		ast_log(LOG_WARNING, " --> ! IND : CALL dad:%s WITHOUT PORT/Group, check extension.conf\n",ext);
		return NULL;
	}

	if (!ast_strlen_zero(group)) {
	
		char cfg_group[BUFFERSIZE+1];
		struct robin_list *rr = NULL;

		if (misdn_cfg_is_group_method(group, METHOD_ROUND_ROBIN)) {
			chan_misdn_log(4, port, " --> STARTING ROUND ROBIN...");
			rr = get_robin_position(group);
		}
		
		if (rr) {
			int robin_channel = rr->channel;
			int port_start;
			int next_chan = 1;

			do {
				port_start = 0;
				for (port = misdn_cfg_get_next_port_spin(rr->port); port > 0 && port != port_start;
					 port = misdn_cfg_get_next_port_spin(port)) {

					if (!port_start)
						port_start = port;

					if (port >= port_start)
						next_chan = 1;
					
					if (port < port_start && next_chan) {
						if (++robin_channel >= MAX_BCHANS) {
							robin_channel = 1;
						}
						next_chan = 0;
					}

					misdn_cfg_get(port, MISDN_CFG_GROUPNAME, cfg_group, BUFFERSIZE);
					
					if (!strcasecmp(cfg_group, group)) {
						int port_up;
						int check;
						misdn_cfg_get(port, MISDN_CFG_PMP_L1_CHECK, &check, sizeof(int));
						port_up = misdn_lib_port_up(port, check);
						
						if ( port_up )	{
							newbc = misdn_lib_get_free_bc(port, robin_channel);
							if (newbc) {
								chan_misdn_log(4, port, " Success! Found port:%d channel:%d\n", newbc->port, newbc->channel);
								if (port_up)
									chan_misdn_log(4, port, "ortup:%d\n",  port_up);
								rr->port = newbc->port;
								rr->channel = newbc->channel;
								break;
							}
						}
					}
				}
			} while (!newbc && robin_channel != rr->channel);
			
			if (!newbc)
				chan_misdn_log(4, port, " Failed! No free channel in group %d!", group);
		}
		
		else {		
			for (port=misdn_cfg_get_next_port(0); port > 0;
				 port=misdn_cfg_get_next_port(port)) {
				
				misdn_cfg_get( port, MISDN_CFG_GROUPNAME, cfg_group, BUFFERSIZE);

				chan_misdn_log(3,port, "Group [%s] Port [%d]\n", group, port);
				if (!strcasecmp(cfg_group, group)) {
					int port_up;
					int check;
					misdn_cfg_get(port, MISDN_CFG_PMP_L1_CHECK, &check, sizeof(int));
					port_up = misdn_lib_port_up(port, check);
					
					chan_misdn_log(4, port, "portup:%d\n", port_up);
					
					if ( port_up )	{
						newbc = misdn_lib_get_free_bc(port, 0);
						if (newbc)
							break;
					}
				}
			}
		}
		
	} else {
		if (channel)
			chan_misdn_log(1, port," --> preselected_channel: %d\n",channel);
		newbc = misdn_lib_get_free_bc(port, channel);
	}
	
	if (!newbc) {
		chan_misdn_log(-1, 0, " --> ! No free channel chan ext:%s even after Group Call\n",ext);
		chan_misdn_log(-1, 0, " --> SEND: State Down\n");
		return NULL;
	}

	/* create ast_channel and link all the objects together */
	cl->bc=newbc;
	
	tmp = misdn_new(cl, AST_STATE_RESERVED, ext, NULL, format, port, channel);
	cl->ast=tmp;
	
	/* register chan in local list */
	cl_queue_chan(&cl_te, cl) ;
	
	/* fill in the config into the objects */
	read_config(cl, ORG_AST);
	
	
	return tmp;
}


int misdn_send_text (struct ast_channel *chan, const char *text)
{
	struct chan_list *tmp=chan->tech_pvt;
	
	if (tmp && tmp->bc) {
		ast_copy_string(tmp->bc->display,text,sizeof(tmp->bc->display));
		misdn_lib_send_event(tmp->bc, EVENT_INFORMATION);
	} else {
		ast_log(LOG_WARNING, "No chan_list but send_text request?\n");
		return -1;
	}
	
	return 0;
}

static struct ast_channel_tech misdn_tech = {
	.type="mISDN",
	.description="Channel driver for mISDN Support (Bri/Pri)",
	.capabilities= AST_FORMAT_ALAW ,
	.requester=misdn_request,
	.send_digit=misdn_digit,
	.call=misdn_call,
	.bridge=misdn_bridge, 
	.hangup=misdn_hangup,
	.answer=misdn_answer,
	.read=misdn_read,
	.write=misdn_write,
	.indicate=misdn_indication,
	.fixup=misdn_fixup,
	.send_text=misdn_send_text,
	.properties=0
};

static struct ast_channel_tech misdn_tech_wo_bridge = {
	.type="mISDN",
	.description="Channel driver for mISDN Support (Bri/Pri)",
	.capabilities=AST_FORMAT_ALAW ,
	.requester=misdn_request,
	.send_digit=misdn_digit,
	.call=misdn_call,
	.hangup=misdn_hangup,
	.answer=misdn_answer,
	.read=misdn_read,
	.write=misdn_write,
	.indicate=misdn_indication,
	.fixup=misdn_fixup,
	.send_text=misdn_send_text,
	.properties=0
};


static unsigned long glob_channel=0;

static struct ast_channel *misdn_new(struct chan_list *chlist, int state,  char *exten, char *callerid, int format, int port, int c)
{
	struct ast_channel *tmp;
	
	tmp = ast_channel_alloc(1);
	
	if (tmp) {
		chan_misdn_log(2, 0, " --> * NEW CHANNEL dad:%s oad:%s\n",exten,callerid);
		
		
		if (c<=0) {
			c=glob_channel++;
			ast_string_field_build(tmp, name, "%s/%d-u%d",
				 misdn_type, port, c);
		} else {
			ast_string_field_build(tmp, name, "%s/%d-%d",
				 misdn_type, port, c);
		}
		
		tmp->nativeformats = prefformat;

		tmp->readformat = format;
		tmp->writeformat = format;
    
		tmp->tech_pvt = chlist;
		
		int bridging;
		misdn_cfg_get( 0, MISDN_GEN_BRIDGING, &bridging, sizeof(int));
		if (bridging)
			tmp->tech = &misdn_tech;
		else
			tmp->tech = &misdn_tech_wo_bridge;
		
		tmp->writeformat = format;
		tmp->readformat = format;
		tmp->priority=1;
		
		if (exten) 
			ast_copy_string(tmp->exten, exten,  sizeof(tmp->exten));
		else
			chan_misdn_log(1,0,"misdn_new: no exten given.\n");
		
		if (callerid) {
			char *cid_name, *cid_num;
      
			ast_callerid_parse(callerid, &cid_name, &cid_num);
			if (cid_name)
				tmp->cid.cid_name=strdup(cid_name);
			if (cid_num)
				tmp->cid.cid_num=strdup(cid_num);
		}

		{
			if (pipe(chlist->pipe)<0)
				perror("Pipe failed\n");
			
			tmp->fds[0]=chlist->pipe[0];
			
		}
		
		ast_setstate(tmp, state);
		if (state == AST_STATE_RING)
			tmp->rings = 1;
		else
			tmp->rings = 0;
		
		
	} else {
		chan_misdn_log(-1,0,"Unable to allocate channel structure\n");
	}
	
	return tmp;
}



static int misdn_tx2ast_frm(struct chan_list * tmp, char * buf,  int len )
{
	struct ast_frame frame;

	/* If in hold state we drop frame .. */
	if (tmp->holded ) return 0;
	
	switch(tmp->state) {
	case MISDN_CLEANING:
	case MISDN_EXTCANTMATCH:
		return 0;
		
	case MISDN_WAITING4DIGS:
	default:
		break;
	}
	
	if (tmp->norxtone) {
		chan_misdn_log(3, tmp->bc->port, "misdn_tx2ast_frm: Returning because norxtone\n");
		return 0;
	}
	
	frame.frametype  = AST_FRAME_VOICE;
	frame.subclass = AST_FORMAT_ALAW;
	frame.datalen = len;
	frame.samples = len ;
	frame.mallocd =0 ;
	frame.offset= 0 ;
	frame.src = NULL;
	frame.data = buf ;
	
	if (tmp->faxdetect || tmp->ast_dsp ) {
		struct ast_frame *f,*f2;
		if (tmp->trans)
			f2=ast_translate(tmp->trans, &frame,0);
		else {
			chan_misdn_log(0, tmp->bc->port, "No T-Path found\n");
			return 0;
		}
		
		f = ast_dsp_process(tmp->ast, tmp->dsp, f2);
		if (f && (f->frametype == AST_FRAME_DTMF)) {
			ast_log(LOG_DEBUG, "Detected inband DTMF digit: %c", f->subclass);
			if (f->subclass == 'f' && tmp->faxdetect) {
				/* Fax tone -- Handle and return NULL */
				struct ast_channel *ast = tmp->ast;
				if (!tmp->faxhandled) {
					tmp->faxhandled++;
					if (strcmp(ast->exten, "fax")) {
						if (ast_exists_extension(ast, S_OR(ast->macrocontext, ast->context), "fax", 1, AST_CID_P(ast))) {
							if (option_verbose > 2)
								ast_verbose(VERBOSE_PREFIX_3 "Redirecting %s to fax extension\n", ast->name);
							/* Save the DID/DNIS when we transfer the fax call to a "fax" extension */
							pbx_builtin_setvar_helper(ast,"FAXEXTEN",ast->exten);
							if (ast_async_goto(ast, ast->context, "fax", 1))
								ast_log(LOG_WARNING, "Failed to async goto '%s' into fax of '%s'\n", ast->name, ast->context);
						} else
							ast_log(LOG_NOTICE, "Fax detected, but no fax extension ctx:%s exten:%s\n",ast->context, ast->exten);
					} else
						ast_log(LOG_DEBUG, "Already in a fax extension, not redirecting\n");
				} else
					ast_log(LOG_DEBUG, "Fax already handled\n");
				frame.frametype = AST_FRAME_NULL;
				frame.subclass = 0;
				f = &frame;
			}  else if ( tmp->ast_dsp) {
				struct ast_frame fr;
				memset(&fr, 0 , sizeof(fr));
				fr.frametype = AST_FRAME_DTMF;
				fr.subclass = f->subclass ;
				fr.src=NULL;
				fr.data = NULL ;
				fr.datalen = 0;
				fr.samples = 0 ;
				fr.mallocd =0 ;
				fr.offset= 0 ;
				
				chan_misdn_log(2, tmp->bc->port, " --> * SEND: DTMF (AST_DSP) :%c\n",f->subclass);
				ast_queue_frame(tmp->ast, &fr);
				
				frame.frametype = AST_FRAME_NULL;
				frame.subclass = 0;
				f = &frame;
			}
		}
	}
	
	if (tmp && tmp->ast && MISDN_ASTERISK_PVT (tmp->ast) && MISDN_ASTERISK_TECH_PVT(tmp->ast) ) {
#if MISDN_DEBUG
		int i, max=5>len?len:5;
    
		printf("write2* %p %d bytes: ",tmp, len);
    
		for (i=0; i<  max ; i++) printf("%2.2x ",((char*) frame.data)[i]);
		printf ("\n");
#endif
		chan_misdn_log(9, tmp->bc->port, "Queueing %d bytes 2 Asterisk\n",len);
		ast_queue_frame(tmp->ast,&frame);

	}  else {
		ast_log (LOG_WARNING, "No ast || ast->pvt || ch\n");
	}
	
	return 0;
}

/** Channel Queue ***/

static struct chan_list *find_chan_by_l3id(struct chan_list *list, unsigned long l3id)
{
	struct chan_list *help=list;
	for (;help; help=help->next) {
		if (help->l3id == l3id ) return help;
	}
  
	chan_misdn_log(6, list? (list->bc? list->bc->port : 0) : 0, "$$$ find_chan: No channel found with l3id:%x\n",l3id);
  
	return NULL;
}

static struct chan_list *find_chan_by_bc(struct chan_list *list, struct misdn_bchannel *bc)
{
	struct chan_list *help=list;
	for (;help; help=help->next) {
		if (help->bc == bc) return help;
	}
  
	chan_misdn_log(6, bc->port, "$$$ find_chan: No channel found for oad:%s dad:%s\n",bc->oad,bc->dad);
  
	return NULL;
}


static struct chan_list *find_holded(struct chan_list *list, struct misdn_bchannel *bc)
{
	struct chan_list *help=list;
	
	chan_misdn_log(6, bc->port, "$$$ find_holded: channel:%d oad:%s dad:%s\n",bc->channel, bc->oad,bc->dad);
	for (;help; help=help->next) {
		chan_misdn_log(4, bc->port, "$$$ find_holded: --> holded:%d channel:%d\n",help->bc->holded, help->bc->channel);
		if (help->bc->port == bc->port
		    && help->bc->holded ) return help;
	}
	
	chan_misdn_log(6, bc->port, "$$$ find_chan: No channel found for oad:%s dad:%s\n",bc->oad,bc->dad);
  
	return NULL;
}

static void cl_queue_chan(struct chan_list **list, struct chan_list *chan)
{
	chan_misdn_log(4, chan->bc? chan->bc->port : 0, "* Queuing chan %p\n",chan);
  
	ast_mutex_lock(&cl_te_lock);
	if (!*list) {
		*list = chan;
	} else {
		struct chan_list *help=*list;
		for (;help->next; help=help->next); 
		help->next=chan;
	}
	chan->next=NULL;
	ast_mutex_unlock(&cl_te_lock);
}

static void cl_dequeue_chan(struct chan_list **list, struct chan_list *chan) 
{
	if (chan->dsp) 
		ast_dsp_free(chan->dsp);
	if (chan->trans)
		ast_translator_free_path(chan->trans);

	

	ast_mutex_lock(&cl_te_lock);
	if (!*list) {
		ast_mutex_unlock(&cl_te_lock);
		return;
	}
  
	if (*list == chan) {
		*list=(*list)->next;
		ast_mutex_unlock(&cl_te_lock);
		return ;
	}
  
	{
		struct chan_list *help=*list;
		for (;help->next; help=help->next) {
			if (help->next == chan) {
				help->next=help->next->next;
				ast_mutex_unlock(&cl_te_lock);
				return;
			}
		}
	}
	
	ast_mutex_unlock(&cl_te_lock);
}

/** Channel Queue End **/



/** Isdn asks us to release channel, pendant to misdn_hangup **/
static void release_chan(struct misdn_bchannel *bc) {
	struct ast_channel *ast=NULL;
	
	{
		struct chan_list *ch=find_chan_by_bc(cl_te, bc);
		if (!ch) ch=find_chan_by_l3id (cl_te, bc->l3_id);
		if (!ch)  {
			chan_misdn_log(0, bc->port, "release_chan: Ch not found!\n");
			return;
		}
		
		release_lock;
		if (ch->ast) {
			ast=ch->ast;
		} 
		release_unlock;
		
		chan_misdn_log(1, bc->port, "Trying to Release bc with l3id: %x\n",bc->l3_id);

		//releaseing jitterbuffer
		if (ch->jb ) {
			misdn_jb_destroy(ch->jb);
			ch->jb=NULL;
		} else {
			if (!bc->nojitter)
				chan_misdn_log(5,bc->port,"Jitterbuffer already destroyed.\n");
		}
		
		if (ch) {
			
			close(ch->pipe[0]);
			close(ch->pipe[1]);
			
			if (ast && MISDN_ASTERISK_PVT(ast)) {
				chan_misdn_log(1, bc->port, "* RELEASING CHANNEL pid:%d ctx:%s dad:%s oad:%s state: %s\n",bc?bc->pid:-1, ast->context, ast->exten,AST_CID_P(ast),misdn_get_ch_state(ch));
				chan_misdn_log(3, bc->port, " --> * State Down\n");
				/* copy cause */
				send_cause2ast(ast,bc);
				
				MISDN_ASTERISK_TECH_PVT(ast)=NULL;
				
      
				if (ast->_state != AST_STATE_RESERVED) {
					chan_misdn_log(3, bc->port, " --> Setting AST State to down\n");
					ast_setstate(ast, AST_STATE_DOWN);
				}
				
				switch(ch->state) {
				case MISDN_EXTCANTMATCH:
				case MISDN_WAITING4DIGS:
				{
					chan_misdn_log(3,  bc->port, " --> * State Wait4dig | ExtCantMatch\n");
					ast_hangup(ast);
				}
				break;
				
				case MISDN_DIALING:
				case MISDN_CALLING_ACKNOWLEDGE:
				case MISDN_PROGRESS:
					chan_misdn_log(2,  bc->port, "* --> In State Dialin\n");
					chan_misdn_log(2,  bc->port, "* --> Queue Hangup\n");
					

					ast_queue_hangup(ast);
					break;
				case MISDN_CALLING:
					
					chan_misdn_log(2,  bc->port, "* --> In State Callin\n");
					
					if (!bc->nt) {
						chan_misdn_log(2,  bc->port, "* --> Queue Hangup\n");
						ast_queue_hangup(ast);
					} else {
						chan_misdn_log(2,  bc->port, "* --> Hangup\n");
						ast_queue_hangup(ast);
					}
					break;
					
				case MISDN_CLEANING:
					/* this state comes out of ast so we mustnt call a ast function ! */
					chan_misdn_log(2,  bc->port, "* --> In StateCleaning\n");
					break;
				case MISDN_HOLD_DISCONNECT:
					chan_misdn_log(2,  bc->port, "* --> In HOLD_DISC\n");
					break;
				default:
					chan_misdn_log(2,  bc->port, "* --> In State Default\n");
					chan_misdn_log(2,  bc->port, "* --> Queue Hangup\n");
					if (ast) {
						ast_queue_hangup(ast);
					} else {
						chan_misdn_log (0,  bc->port, "!! Not really queued!\n");
					}
				}
			}
			cl_dequeue_chan(&cl_te, ch);
			
			free(ch);
		} else {
			/* chan is already cleaned, so exiting  */
		}
	}
}
/*** release end **/

static void misdn_transfer_bc(struct chan_list *tmp_ch, struct chan_list *holded_chan)
{
	chan_misdn_log(4,0,"TRANSFERING %s to %s\n",holded_chan->ast->name, tmp_ch->ast->name);
	
	tmp_ch->state=MISDN_HOLD_DISCONNECT;
  
	ast_moh_stop(AST_BRIDGED_P(holded_chan->ast));

	holded_chan->state=MISDN_CONNECTED;
	holded_chan->holded=0;
	misdn_lib_transfer(holded_chan->bc?holded_chan->bc:holded_chan->holded_bc);
	ast_channel_masquerade(holded_chan->ast, AST_BRIDGED_P(tmp_ch->ast));
}


static void do_immediate_setup(struct misdn_bchannel *bc,struct chan_list *ch , struct ast_channel *ast)
{
	char predial[256]="";
	char *p = predial;
  
	struct ast_frame fr;
  
	strncpy(predial, ast->exten, sizeof(predial) -1 );
  
	ch->state=MISDN_DIALING;

	if (bc->nt) {
		int ret; 
		ret = misdn_lib_send_event(bc, EVENT_SETUP_ACKNOWLEDGE );
	} else {
		int ret;
		if ( misdn_lib_is_ptp(bc->port)) {
			ret = misdn_lib_send_event(bc, EVENT_SETUP_ACKNOWLEDGE );
		} else {
			ret = misdn_lib_send_event(bc, EVENT_PROCEEDING );
		}
	}

	if ( !bc->nt && (ch->orginator==ORG_MISDN) && !ch->incoming_early_audio ) 
		chan_misdn_log(1,bc->port, " --> incoming_early_audio off\n");
	 else