/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * chan_skinny was developed by Jeremy McNamara & Florian Overkamp
 * chan_skinny was heavily modified/fixed by North Antara
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Implementation of the Skinny protocol
 *
 * \author Jeremy McNamara & Florian Overkamp & North Antara
 * \ingroup channel_drivers
 */


#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/signal.h>
#include <signal.h>
#include <ctype.h>

#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/options.h"
#include "asterisk/lock.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/cli.h"
#include "asterisk/say.h"
#include "asterisk/cdr.h"
#include "asterisk/astdb.h"
#include "asterisk/features.h"
#include "asterisk/app.h"
#include "asterisk/musiconhold.h"
#include "asterisk/utils.h"
#include "asterisk/dsp.h"
#include "asterisk/stringfields.h"
#include "asterisk/astobj.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/threadstorage.h"

/*************************************
 * Skinny/Asterisk Protocol Settings *
 *************************************/
static const char tdesc[] = "Skinny Client Control Protocol (Skinny)";
static const char config[] = "skinny.conf";

static int default_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW;
static struct ast_codec_pref default_prefs;

enum skinny_codecs {
	SKINNY_CODEC_ALAW = 2,
	SKINNY_CODEC_ULAW = 4,
	SKINNY_CODEC_G723_1 = 9,
	SKINNY_CODEC_G729A = 12,
	SKINNY_CODEC_G726_32 = 82, /* XXX Which packing order does this translate to? */
	SKINNY_CODEC_H261 = 100,
	SKINNY_CODEC_H263 = 101
};

#define DEFAULT_SKINNY_PORT	2000
#define DEFAULT_SKINNY_BACKLOG	2
#define SKINNY_MAX_PACKET	1000

static int keep_alive = 120;
static char date_format[6] = "D-M-Y";
static char version_id[16] = "P002F202";

#if __BYTE_ORDER == __LITTLE_ENDIAN
#define letohl(x) (x)
#define letohs(x) (x)
#define htolel(x) (x)
#define htoles(x) (x)
#else
#if defined(SOLARIS) || defined(__Darwin__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
#define __bswap_16(x) \
	((((x) & 0xff00) >> 8) | \
	 (((x) & 0x00ff) << 8))
#define __bswap_32(x) \
	((((x) & 0xff000000) >> 24) | \
	 (((x) & 0x00ff0000) >>  8) | \
	 (((x) & 0x0000ff00) <<  8) | \
	 (((x) & 0x000000ff) << 24))
#else
#include <bits/byteswap.h>
#endif
#define letohl(x) __bswap_32(x)
#define letohs(x) __bswap_16(x)
#define htolel(x) __bswap_32(x)
#define htoles(x) __bswap_16(x)
#endif

/*! Global jitterbuffer configuration - by default, jb is disabled */
static struct ast_jb_conf default_jbconf =
{
	.flags = 0,
	.max_size = -1,
	.resync_threshold = -1,
	.impl = ""
};
static struct ast_jb_conf global_jbconf;

AST_THREADSTORAGE(device2str_threadbuf, device2str_threadbuf_init);
#define DEVICE2STR_BUFSIZE   15

AST_THREADSTORAGE(control2str_threadbuf, control2str_threadbuf_init);
#define CONTROL2STR_BUFSIZE   100

/*********************
 * Protocol Messages *
 *********************/
/* message types */
#define KEEP_ALIVE_MESSAGE 0x0000
/* no additional struct */

#define REGISTER_MESSAGE 0x0001
struct register_message {
	char name[16];
	uint32_t userId;
	uint32_t instance;
	uint32_t ip;
	uint32_t type;
	uint32_t maxStreams;
};

#define IP_PORT_MESSAGE	0x0002

#define KEYPAD_BUTTON_MESSAGE 0x0003
struct keypad_button_message {
	uint32_t button;
	uint32_t lineInstance;
	uint32_t callReference;
};


#define ENBLOC_CALL_MESSAGE 0x0004
struct enbloc_call_message {
       char calledParty[24];
};

#define STIMULUS_MESSAGE 0x0005
struct stimulus_message {
	uint32_t stimulus;
	uint32_t stimulusInstance;
	uint32_t callreference;
};

#define OFFHOOK_MESSAGE 0x0006
struct offhook_message {
	uint32_t unknown1;
	uint32_t unknown2;
};

#define ONHOOK_MESSAGE 0x0007
struct onhook_message {
	uint32_t unknown1;
	uint32_t unknown2;
};

#define CAPABILITIES_RES_MESSAGE 0x0010
struct station_capabilities {
	uint32_t codec;
	uint32_t frames;
	union {
		char res[8];
		uint32_t rate;
	} payloads;
};

#define SKINNY_MAX_CAPABILITIES 18

struct capabilities_res_message {
	uint32_t count;
	struct station_capabilities caps[SKINNY_MAX_CAPABILITIES];
};

#define SPEED_DIAL_STAT_REQ_MESSAGE 0x000A
struct speed_dial_stat_req_message {
	uint32_t speedDialNumber;
};

#define LINE_STATE_REQ_MESSAGE 0x000B
struct line_state_req_message {
	uint32_t lineNumber;
};

#define TIME_DATE_REQ_MESSAGE 0x000D
#define BUTTON_TEMPLATE_REQ_MESSAGE 0x000E
#define VERSION_REQ_MESSAGE 0x000F
#define SERVER_REQUEST_MESSAGE 0x0012

#define ALARM_MESSAGE 0x0020
struct alarm_message {
	uint32_t alarmSeverity;
	char displayMessage[80];
	uint32_t alarmParam1;
	uint32_t alarmParam2;
};

#define OPEN_RECEIVE_CHANNEL_ACK_MESSAGE 0x0022
struct open_receive_channel_ack_message {
	uint32_t status;
	uint32_t ipAddr;
	uint32_t port;
	uint32_t passThruId;
};

#define SOFT_KEY_SET_REQ_MESSAGE 0x0025

#define SOFT_KEY_EVENT_MESSAGE 0x0026
struct soft_key_event_message {
	uint32_t softKeyEvent;
	uint32_t instance;
	uint32_t callreference;
};

#define UNREGISTER_MESSAGE 0x0027
#define SOFT_KEY_TEMPLATE_REQ_MESSAGE 0x0028
#define HEADSET_STATUS_MESSAGE 0x002B
#define REGISTER_AVAILABLE_LINES_MESSAGE 0x002D

#define REGISTER_ACK_MESSAGE 0x0081
struct register_ack_message {
	uint32_t keepAlive;
	char dateTemplate[6];
	char res[2];
	uint32_t secondaryKeepAlive;
	char res2[4];
};

#define START_TONE_MESSAGE 0x0082
struct start_tone_message {
	uint32_t tone;
	uint32_t space;
	uint32_t instance;
	uint32_t reference;
};

#define STOP_TONE_MESSAGE 0x0083
struct stop_tone_message {
	uint32_t instance;
	uint32_t reference;
};

#define SET_RINGER_MESSAGE 0x0085
struct set_ringer_message {
	uint32_t ringerMode;
	uint32_t unknown1; /* See notes in transmit_ringer_mode */
	uint32_t unknown2;
	uint32_t space[2];
};

#define SET_LAMP_MESSAGE 0x0086
struct set_lamp_message {
	uint32_t stimulus;
	uint32_t stimulusInstance;
	uint32_t deviceStimulus;
};

#define SET_SPEAKER_MESSAGE 0x0088
struct set_speaker_message {
	uint32_t mode;
};

/* XXX When do we need to use this? */
#define SET_MICROPHONE_MESSAGE 0x0089
struct set_microphone_message {
	uint32_t mode;
};

#define START_MEDIA_TRANSMISSION_MESSAGE 0x008A
struct media_qualifier {
	uint32_t precedence;
	uint32_t vad;
	uint16_t packets;
	uint32_t bitRate;
};

struct start_media_transmission_message {
	uint32_t conferenceId;
	uint32_t passThruPartyId;
	uint32_t remoteIp;
	uint32_t remotePort;
	uint32_t packetSize;
	uint32_t payloadType;
	struct media_qualifier qualifier;
	uint32_t space[16];
};

#define STOP_MEDIA_TRANSMISSION_MESSAGE 0x008B
struct stop_media_transmission_message {
	uint32_t conferenceId;
	uint32_t passThruPartyId;
	uint32_t space[3];
};

#define CALL_INFO_MESSAGE 0x008F
struct call_info_message {
	char callingPartyName[40];
	char callingParty[24];
	char calledPartyName[40];
	char calledParty[24];
	uint32_t instance;
	uint32_t reference;
	uint32_t type;
	char originalCalledPartyName[40];
	char originalCalledParty[24];
	char lastRedirectingPartyName[40];
	char lastRedirectingParty[24];
	uint32_t originalCalledPartyRedirectReason;
	uint32_t lastRedirectingReason;
	char callingPartyVoiceMailbox[24];
	char calledPartyVoiceMailbox[24];
	char originalCalledPartyVoiceMailbox[24];
	char lastRedirectingVoiceMailbox[24];
	uint32_t space[3];
};

#define SPEED_DIAL_STAT_RES_MESSAGE 0x0091
struct speed_dial_stat_res_message {
	uint32_t speedDialNumber;
	char speedDialDirNumber[24];
	char speedDialDisplayName[40];
};

#define LINE_STAT_RES_MESSAGE 0x0092
struct line_stat_res_message {
	uint32_t lineNumber;
	char lineDirNumber[24];
	char lineDisplayName[24];
	uint32_t space[15];
};

#define DEFINETIMEDATE_MESSAGE 0x0094
struct definetimedate_message {
	uint32_t year;	/* since 1900 */
	uint32_t month;
	uint32_t dayofweek;	/* monday = 1 */
	uint32_t day;
	uint32_t hour;
	uint32_t minute;
	uint32_t seconds;
	uint32_t milliseconds;
	uint32_t timestamp;
};

#define BUTTON_TEMPLATE_RES_MESSAGE 0x0097
struct button_definition {
	uint8_t instanceNumber;
	uint8_t buttonDefinition;
};

struct button_definition_template {
	uint8_t buttonDefinition;
	/* for now, anything between 0xB0 and 0xCF is custom */
	/*int custom;*/
};

#define STIMULUS_REDIAL			0x01
#define STIMULUS_SPEEDDIAL		0x02
#define STIMULUS_HOLD			0x03
#define STIMULUS_TRANSFER		0x04
#define STIMULUS_FORWARDALL		0x05
#define STIMULUS_FORWARDBUSY		0x06
#define STIMULUS_FORWARDNOANSWER	0x07
#define STIMULUS_DISPLAY		0x08
#define STIMULUS_LINE			0x09
#define STIMULUS_VOICEMAIL		0x0F
#define STIMULUS_AUTOANSWER		0x11
#define STIMULUS_CONFERENCE		0x7D
#define STIMULUS_CALLPARK		0x7E
#define STIMULUS_CALLPICKUP		0x7F
#define STIMULUS_NONE			0xFF

/* Button types */
#define BT_REDIAL			STIMULUS_REDIAL
#define BT_SPEEDDIAL			STIMULUS_SPEEDDIAL
#define BT_HOLD				STIMULUS_HOLD
#define BT_TRANSFER			STIMULUS_TRANSFER
#define BT_FORWARDALL			STIMULUS_FORWARDALL
#define BT_FORWARDBUSY			STIMULUS_FORWARDBUSY
#define BT_FORWARDNOANSWER		STIMULUS_FORWARDNOANSWER
#define BT_DISPLAY 			STIMULUS_DISPLAY
#define BT_LINE				STIMULUS_LINE
#define BT_VOICEMAIL			STIMULUS_VOICEMAIL
#define BT_AUTOANSWER			STIMULUS_AUTOANSWER
#define BT_CONFERENCE			STIMULUS_CONFERENCE
#define BT_CALLPARK			STIMULUS_CALLPARK
#define BT_CALLPICKUP			STIMULUS_CALLPICKUP
#define BT_NONE				0x00

/* Custom button types - add our own between 0xB0 and 0xCF.
   This may need to be revised in the future,
   if stimuluses are ever added in this range. */
#define BT_CUST_LINESPEEDDIAL		0xB0	/* line or speeddial */
#define BT_CUST_HINT			0xB1	/* pipe dream */

struct button_template_res_message {
	uint32_t buttonOffset;
	uint32_t buttonCount;
	uint32_t totalButtonCount;
	struct button_definition definition[42];
};

#define VERSION_RES_MESSAGE 0x0098
struct version_res_message {
	char version[16];
};

#define DISPLAYTEXT_MESSAGE 0x0099
struct displaytext_message {
	char text[40];
};

#define CLEAR_NOTIFY_MESSAGE  0x0115
#define CLEAR_DISPLAY_MESSAGE 0x009A

#define CAPABILITIES_REQ_MESSAGE 0x009B

#define REGISTER_REJ_MESSAGE 0x009D
struct register_rej_message {
	char errMsg[33];
};

#define SERVER_RES_MESSAGE 0x009E
struct server_identifier {
	char serverName[48];
};

struct server_res_message {
	struct server_identifier server[5];
	uint32_t serverListenPort[5];
	uint32_t serverIpAddr[5];
};

#define RESET_MESSAGE 0x009F
struct reset_message {
	uint32_t resetType;
};

#define KEEP_ALIVE_ACK_MESSAGE 0x0100

#define OPEN_RECEIVE_CHANNEL_MESSAGE 0x0105
struct open_receive_channel_message {
	uint32_t conferenceId;
	uint32_t partyId;
	uint32_t packets;
	uint32_t capability;
	uint32_t echo;
	uint32_t bitrate;
	uint32_t space[16];
};

#define CLOSE_RECEIVE_CHANNEL_MESSAGE 0x0106
struct close_receive_channel_message {
	uint32_t conferenceId;
	uint32_t partyId;
	uint32_t space[2];
};

#define SOFT_KEY_TEMPLATE_RES_MESSAGE 0x0108

struct soft_key_template_definition {
	char softKeyLabel[16];
	uint32_t softKeyEvent;
};

#define KEYDEF_ONHOOK			0
#define KEYDEF_CONNECTED		1
#define KEYDEF_ONHOLD			2
#define KEYDEF_RINGIN			3
#define KEYDEF_OFFHOOK			4
#define KEYDEF_CONNWITHTRANS		5
#define KEYDEF_DADFD			6 /* Digits After Dialing First Digit */
#define KEYDEF_CONNWITHCONF		7
#define KEYDEF_RINGOUT			8
#define KEYDEF_OFFHOOKWITHFEAT		9
#define KEYDEF_UNKNOWN			10

#define SOFTKEY_NONE			0x00
#define SOFTKEY_REDIAL			0x01
#define SOFTKEY_NEWCALL			0x02
#define SOFTKEY_HOLD			0x03
#define SOFTKEY_TRNSFER			0x04
#define SOFTKEY_CFWDALL			0x05
#define SOFTKEY_CFWDBUSY		0x06
#define SOFTKEY_CFWDNOANSWER		0x07
#define SOFTKEY_BKSPC			0x08
#define SOFTKEY_ENDCALL			0x09
#define SOFTKEY_RESUME			0x0A
#define SOFTKEY_ANSWER			0x0B
#define SOFTKEY_INFO			0x0C
#define SOFTKEY_CONFRN			0x0D
#define SOFTKEY_PARK			0x0E
#define SOFTKEY_JOIN			0x0F
#define SOFTKEY_MEETME			0x10
#define SOFTKEY_PICKUP			0x11
#define SOFTKEY_GPICKUP			0x12

struct soft_key_template_definition soft_key_template_default[] = {
	{ "Redial",	 	0x01 },
	{ "NewCall",	 	0x02 },
	{ "Hold",	 	0x03 },
	{ "Trnsfer",	 	0x04 },
	{ "CFwdAll",	 	0x05 },
	{ "CFwdBusy",	 	0x06 },
	{ "CFwdNoAnswer",	0x07 },
	{ "<<",		 	0x08 },
	{ "EndCall",	 	0x09 },
	{ "Resume",		0x0A },
	{ "Answer",		0x0B },
	{ "Info",		0x0C },
	{ "Confrn",		0x0D },
	{ "Park",		0x0E },
	{ "Join",		0x0F },
	{ "MeetMe",		0x10 },
	{ "PickUp",		0x11 },
	{ "GPickUp",		0x12 },
};

struct soft_key_definitions {
	const uint8_t mode;
	const uint8_t *defaults;
	const int count;
};

static const uint8_t soft_key_default_onhook[] = {
	SOFTKEY_REDIAL,
	SOFTKEY_NEWCALL,
	SOFTKEY_CFWDALL,
	SOFTKEY_CFWDBUSY,
	/*SOFTKEY_GPICKUP,
	SOFTKEY_CONFRN,*/
};

static const uint8_t soft_key_default_connected[] = {
	SOFTKEY_HOLD,
	SOFTKEY_ENDCALL,
	SOFTKEY_TRNSFER,
	SOFTKEY_PARK,
	SOFTKEY_CFWDALL,
	SOFTKEY_CFWDBUSY,
};

static const uint8_t soft_key_default_onhold[] = {
	SOFTKEY_RESUME,
	SOFTKEY_NEWCALL,
	SOFTKEY_ENDCALL,
	SOFTKEY_TRNSFER,
};

static const uint8_t soft_key_default_ringin[] = {
	SOFTKEY_ANSWER,
	SOFTKEY_ENDCALL,
	SOFTKEY_TRNSFER,
};

static const uint8_t soft_key_default_offhook[] = {
	SOFTKEY_REDIAL,
	SOFTKEY_ENDCALL,
	SOFTKEY_CFWDALL,
	SOFTKEY_CFWDBUSY,
	/*SOFTKEY_GPICKUP,*/
};

static const uint8_t soft_key_default_connwithtrans[] = {
	SOFTKEY_HOLD,
	SOFTKEY_ENDCALL,
	SOFTKEY_TRNSFER,
	SOFTKEY_PARK,
	SOFTKEY_CFWDALL,
	SOFTKEY_CFWDBUSY,
};

static const uint8_t soft_key_default_dadfd[] = {
	SOFTKEY_BKSPC,
	SOFTKEY_ENDCALL,
};

static const uint8_t soft_key_default_connwithconf[] = {
	SOFTKEY_NONE,
};

static const uint8_t soft_key_default_ringout[] = {
	SOFTKEY_NONE,
	SOFTKEY_ENDCALL,
};

static const uint8_t soft_key_default_offhookwithfeat[] = {
	SOFTKEY_REDIAL,
	SOFTKEY_ENDCALL,
};

static const uint8_t soft_key_default_unknown[] = {
	SOFTKEY_NONE,
};

static const struct soft_key_definitions soft_key_default_definitions[] = {
	{KEYDEF_ONHOOK, soft_key_default_onhook, sizeof(soft_key_default_onhook) / sizeof(uint8_t)},
	{KEYDEF_CONNECTED, soft_key_default_connected, sizeof(soft_key_default_connected) / sizeof(uint8_t)},
	{KEYDEF_ONHOLD, soft_key_default_onhold, sizeof(soft_key_default_onhold) / sizeof(uint8_t)},
	{KEYDEF_RINGIN, soft_key_default_ringin, sizeof(soft_key_default_ringin) / sizeof(uint8_t)},
	{KEYDEF_OFFHOOK, soft_key_default_offhook, sizeof(soft_key_default_offhook) / sizeof(uint8_t)},
	{KEYDEF_CONNWITHTRANS, soft_key_default_connwithtrans, sizeof(soft_key_default_connwithtrans) / sizeof(uint8_t)},
	{KEYDEF_DADFD, soft_key_default_dadfd, sizeof(soft_key_default_dadfd) / sizeof(uint8_t)},
	{KEYDEF_CONNWITHCONF, soft_key_default_connwithconf, sizeof(soft_key_default_connwithconf) / sizeof(uint8_t)},
	{KEYDEF_RINGOUT, soft_key_default_ringout, sizeof(soft_key_default_ringout) / sizeof(uint8_t)},
	{KEYDEF_OFFHOOKWITHFEAT, soft_key_default_offhookwithfeat, sizeof(soft_key_default_offhookwithfeat) / sizeof(uint8_t)},
	{KEYDEF_UNKNOWN, soft_key_default_unknown, sizeof(soft_key_default_unknown) / sizeof(uint8_t)}
};

struct soft_key_template_res_message {
	uint32_t softKeyOffset;
	uint32_t softKeyCount;
	uint32_t totalSoftKeyCount;
	struct soft_key_template_definition softKeyTemplateDefinition[32];
};

#define SOFT_KEY_SET_RES_MESSAGE 0x0109

struct soft_key_set_definition {
	uint8_t softKeyTemplateIndex[16];
	uint16_t softKeyInfoIndex[16];
};

struct soft_key_set_res_message {
	uint32_t softKeySetOffset;
	uint32_t softKeySetCount;
	uint32_t totalSoftKeySetCount;
	struct soft_key_set_definition softKeySetDefinition[16];
	uint32_t res;
};

#define SELECT_SOFT_KEYS_MESSAGE 0x0110
struct select_soft_keys_message {
	uint32_t instance;
	uint32_t reference;
	uint32_t softKeySetIndex;
	uint32_t validKeyMask;
};

#define CALL_STATE_MESSAGE 0x0111
struct call_state_message {
	uint32_t callState;
	uint32_t lineInstance;
	uint32_t callReference;
	uint32_t space[3];
};

#define DISPLAY_PROMPT_STATUS_MESSAGE 0x0112
struct display_prompt_status_message {
	uint32_t messageTimeout;
	char promptMessage[32];
	uint32_t lineInstance;
	uint32_t callReference;
};

#define CLEAR_PROMPT_MESSAGE  0x0113
struct clear_prompt_message {
       uint32_t lineInstance;
       uint32_t callReference;
};

#define DISPLAY_NOTIFY_MESSAGE 0x0114
struct display_notify_message {
	uint32_t displayTimeout;
	char displayMessage[100];
};

#define ACTIVATE_CALL_PLANE_MESSAGE 0x0116
struct activate_call_plane_message {
	uint32_t lineInstance;
};

#define DIALED_NUMBER_MESSAGE 0x011D
struct dialed_number_message {
	char dialedNumber[24];
	uint32_t lineInstance;
	uint32_t callReference;
};

union skinny_data {
	struct alarm_message alarm;
	struct speed_dial_stat_req_message speeddialreq;
	struct register_message reg;
	struct register_ack_message regack;
	struct register_rej_message regrej;
	struct capabilities_res_message caps;
	struct version_res_message version;
	struct button_template_res_message buttontemplate;
	struct displaytext_message displaytext;
	struct display_prompt_status_message displaypromptstatus;
	struct clear_prompt_message clearpromptstatus;
	struct definetimedate_message definetimedate;
	struct start_tone_message starttone;
	struct stop_tone_message stoptone;
	struct speed_dial_stat_res_message speeddial;
	struct line_state_req_message line;
	struct line_stat_res_message linestat;
	struct soft_key_set_res_message softkeysets;
	struct soft_key_template_res_message softkeytemplate;
	struct server_res_message serverres;
	struct reset_message reset;
	struct set_lamp_message setlamp;
	struct set_ringer_message setringer;
	struct call_state_message callstate;
	struct keypad_button_message keypad;
	struct select_soft_keys_message selectsoftkey;
	struct activate_call_plane_message activatecallplane;
	struct stimulus_message stimulus;
	struct offhook_message offhook;
	struct onhook_message onhook;
	struct set_speaker_message setspeaker;
	struct set_microphone_message setmicrophone;
	struct call_info_message callinfo;
	struct start_media_transmission_message startmedia;
	struct stop_media_transmission_message stopmedia;
	struct open_receive_channel_message openreceivechannel;
	struct open_receive_channel_ack_message openreceivechannelack;
	struct close_receive_channel_message closereceivechannel;
	struct display_notify_message displaynotify;
	struct dialed_number_message dialednumber;
	struct soft_key_event_message softkeyeventmessage;
	struct enbloc_call_message enbloccallmessage;
};

/* packet composition */
struct skinny_req {
	int len;
	int res;
	int e;
	union skinny_data data;
};

/* XXX This is the combined size of the variables above.  (len, res, e)
   If more are added, this MUST change.
   (sizeof(skinny_req) - sizeof(skinny_data)) DOES NOT WORK on all systems (amd64?). */
int skinny_header_size = 12;

/*****************************
 * Asterisk specific globals *
 *****************************/

static int skinnydebug = 0;

/* a hostname, portnumber, socket and such is usefull for VoIP protocols */
static struct sockaddr_in bindaddr;
static char ourhost[256];
static int ourport;
static struct in_addr __ourip;
struct ast_hostent ahp;
struct hostent *hp;
static int skinnysock = -1;
static pthread_t accept_t;
static char context[AST_MAX_CONTEXT] = "default";
static char language[MAX_LANGUAGE] = "";
static char mohinterpret[MAX_MUSICCLASS] = "default";
static char mohsuggest[MAX_MUSICCLASS] = "";
static char cid_num[AST_MAX_EXTENSION] = "";
static char cid_name[AST_MAX_EXTENSION] = "";
static char linelabel[AST_MAX_EXTENSION] ="";
static int nat = 0;
static ast_group_t cur_callergroup = 0;
static ast_group_t cur_pickupgroup = 0;
static int immediate = 0;
static int callwaiting = 0;
static int callreturn = 0;
static int threewaycalling = 0;
static int mwiblink = 0;
/* This is for flashhook transfers */
static int transfer = 0;
static int cancallforward = 0;
/* static int busycount = 3;*/
static char accountcode[AST_MAX_ACCOUNT_CODE] = "";
static char mailbox[AST_MAX_EXTENSION];
static int amaflags = 0;
static int callnums = 1;

#define SKINNY_DEVICE_UNKNOWN		-1
#define SKINNY_DEVICE_NONE		0
#define SKINNY_DEVICE_30SPPLUS		1
#define SKINNY_DEVICE_12SPPLUS		2
#define SKINNY_DEVICE_12SP		3
#define SKINNY_DEVICE_12		4
#define SKINNY_DEVICE_30VIP		5
#define SKINNY_DEVICE_7910		6
#define SKINNY_DEVICE_7960		7
#define SKINNY_DEVICE_7940		8
#define SKINNY_DEVICE_7935		9
#define SKINNY_DEVICE_ATA186		12	/* Cisco ATA-186 */
#define SKINNY_DEVICE_7941		115
#define SKINNY_DEVICE_7971		119
#define SKINNY_DEVICE_7914		124	/* Expansion module */
#define SKINNY_DEVICE_7985		302
#define SKINNY_DEVICE_7911		307
#define SKINNY_DEVICE_7961GE		308
#define SKINNY_DEVICE_7941GE		309
#define SKINNY_DEVICE_7931		348
#define SKINNY_DEVICE_7921		365
#define SKINNY_DEVICE_7906		369
#define SKINNY_DEVICE_7962		404	/* Not found */
#define SKINNY_DEVICE_7937		431
#define SKINNY_DEVICE_7942		434
#define SKINNY_DEVICE_7945		435
#define SKINNY_DEVICE_7965		436
#define SKINNY_DEVICE_7975		437
#define SKINNY_DEVICE_7905		20000
#define SKINNY_DEVICE_7920		30002
#define SKINNY_DEVICE_7970		30006
#define SKINNY_DEVICE_7912		30007
#define SKINNY_DEVICE_7902		30008
#define SKINNY_DEVICE_CIPC		30016	/* Cisco IP Communicator */
#define SKINNY_DEVICE_7961		30018
#define SKINNY_DEVICE_7936		30019
#define SKINNY_DEVICE_SCCPGATEWAY_AN	30027	/* ??? */
#define SKINNY_DEVICE_SCCPGATEWAY_BRI	30028	/* ??? */

#define SKINNY_SPEAKERON 1
#define SKINNY_SPEAKEROFF 2

#define SKINNY_MICON 1
#define SKINNY_MICOFF 2

#define SKINNY_OFFHOOK 1
#define SKINNY_ONHOOK 2
#define SKINNY_RINGOUT 3
#define SKINNY_RINGIN 4
#define SKINNY_CONNECTED 5
#define SKINNY_BUSY 6
#define SKINNY_CONGESTION 7
#define SKINNY_HOLD 8
#define SKINNY_CALLWAIT 9
#define SKINNY_TRANSFER 10
#define SKINNY_PARK 11
#define SKINNY_PROGRESS 12
#define SKINNY_INVALID 14

#define SKINNY_SILENCE 		0x00
#define SKINNY_DIALTONE 	0x21
#define SKINNY_BUSYTONE 	0x23
#define SKINNY_ALERT	 	0x24
#define SKINNY_REORDER 		0x25
#define SKINNY_CALLWAITTONE 	0x2D
#define SKINNY_NOTONE 		0x7F

#define SKINNY_LAMP_OFF 1
#define SKINNY_LAMP_ON 2
#define SKINNY_LAMP_WINK 3
#define SKINNY_LAMP_FLASH 4
#define SKINNY_LAMP_BLINK 5

#define SKINNY_RING_OFF 1
#define SKINNY_RING_INSIDE 2
#define SKINNY_RING_OUTSIDE 3
#define SKINNY_RING_FEATURE 4

#define TYPE_TRUNK 1
#define TYPE_LINE 2

/* Skinny rtp stream modes. Do we really need this? */
#define SKINNY_CX_SENDONLY	0
#define SKINNY_CX_RECVONLY	1
#define SKINNY_CX_SENDRECV	2
#define SKINNY_CX_CONF		3
#define SKINNY_CX_CONFERENCE	3
#define SKINNY_CX_MUTE		4
#define SKINNY_CX_INACTIVE	4

#if 0
static char *skinny_cxmodes[] = {
	"sendonly",
	"recvonly",
	"sendrecv",
	"confrnce",
	"inactive"
};
#endif

/* driver scheduler */
static struct sched_context *sched = NULL;
static struct io_context *io;

/* Protect the monitoring thread, so only one process can kill or start it, and not
   when it's doing something critical. */
AST_MUTEX_DEFINE_STATIC(monlock);
/* Protect the network socket */
AST_MUTEX_DEFINE_STATIC(netlock);
/* Protect the session list */
AST_MUTEX_DEFINE_STATIC(sessionlock);
/* Protect the device list */
AST_MUTEX_DEFINE_STATIC(devicelock);
#if 0
/* Protect the paging device list */
AST_MUTEX_DEFINE_STATIC(pagingdevicelock);
#endif

/* This is the thread for the monitor which checks for input on the channels
   which are not currently in use. */
static pthread_t monitor_thread = AST_PTHREADT_NULL;

/* Wait up to 16 seconds for first digit */
static int firstdigittimeout = 16000;

/* How long to wait for following digits */
static int gendigittimeout = 8000;

/* How long to wait for an extra digit, if there is an ambiguous match */
static int matchdigittimeout = 3000;

struct skinny_subchannel {
	ast_mutex_t lock;
	struct ast_channel *owner;
	struct ast_rtp *rtp;
	struct ast_rtp *vrtp;
	unsigned int callid;
	/* time_t lastouttime; */			/* Unused */
	int progress;
	int ringing;
	int onhold;
	/* int lastout; */				/* Unused */
	int cxmode;
	int nat;
	int outgoing;
	int alreadygone;

	struct skinny_subchannel *next;
	struct skinny_line *parent;
};

struct skinny_line {
	ast_mutex_t lock;
	char name[80];
	char label[24];					/* Label that shows next to the line buttons */
	char accountcode[AST_MAX_ACCOUNT_CODE];
	char exten[AST_MAX_EXTENSION];			/* Extension where to start */
	char context[AST_MAX_CONTEXT];
	char language[MAX_LANGUAGE];
	char cid_num[AST_MAX_EXTENSION];		/* Caller*ID */
	char cid_name[AST_MAX_EXTENSION];		/* Caller*ID */
	char lastcallerid[AST_MAX_EXTENSION];		/* Last Caller*ID */
	char call_forward[AST_MAX_EXTENSION];
	char mailbox[AST_MAX_EXTENSION];
	char mohinterpret[MAX_MUSICCLASS];
	char mohsuggest[MAX_MUSICCLASS];
	char lastnumberdialed[AST_MAX_EXTENSION];	/* Last number that was dialed - used for redial */
	int curtone;					/* Current tone being played */
	ast_group_t callgroup;
	ast_group_t pickupgroup;
	int callwaiting;
	int transfer;
	int threewaycalling;
	int mwiblink;
	int cancallforward;
	int callreturn;
	int dnd; /* How does this affect callwait?  Do we just deny a skinny_request if we're dnd? */
	int hascallerid;
	int hidecallerid;
	int amaflags;
	int type;
	int instance;
	int group;
	int needdestroy;
	int capability;
	int nonCodecCapability;
	int onhooktime;
	int msgstate;					/* voicemail message state */
	int immediate;
	int hookstate;
	int nat;

	struct ast_codec_pref prefs;
	struct skinny_subchannel *sub;
	struct skinny_line *next;
	struct skinny_device *parent;
};

struct skinny_speeddial {
	ast_mutex_t lock;
	char label[42];
	char exten[AST_MAX_EXTENSION];
	int instance;

	struct skinny_speeddial *next;
	struct skinny_device *parent;
};

struct skinny_addon {
	ast_mutex_t lock;
	char type[10];

	struct skinny_addon *next;
	struct skinny_device *parent;
};

static struct skinny_device {
	/* A device containing one or more lines */
	char name[80];
	char id[16];
	char version_id[16];
	int type;
	int registered;
	int lastlineinstance;
	int lastcallreference;
	int capability;
	int earlyrtp;
	char exten[AST_MAX_EXTENSION];
	struct sockaddr_in addr;
	struct in_addr ourip;
	struct skinny_line *lines;
	struct skinny_speeddial *speeddials;
	struct skinny_addon *addons;
	struct ast_codec_pref prefs;
	struct ast_ha *ha;
	struct skinnysession *session;
	struct skinny_device *next;
} *devices = NULL;

struct skinny_paging_device {
	char name[80];
	char id[16];
	struct skinny_device ** devices;
	struct skinny_paging_device *next;
};

static struct skinnysession {
	pthread_t t;
	ast_mutex_t lock;
	struct sockaddr_in sin;
	int fd;
	char inbuf[SKINNY_MAX_PACKET];
	char outbuf[SKINNY_MAX_PACKET];
	struct skinny_device *device;
	struct skinnysession *next;
} *sessions = NULL;

static struct ast_channel *skinny_request(const char *type, int format, void *data, int *cause);
static int skinny_call(struct ast_channel *ast, char *dest, int timeout);
static int skinny_hangup(struct ast_channel *ast);
static int skinny_answer(struct ast_channel *ast);
static struct ast_frame *skinny_read(struct ast_channel *ast);
static int skinny_write(struct ast_channel *ast, struct ast_frame *frame);
static int skinny_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen);
static int skinny_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
static int skinny_senddigit_begin(struct ast_channel *ast, char digit);
static int skinny_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration);
static int handle_time_date_req_message(struct skinny_req *req, struct skinnysession *s);

static const struct ast_channel_tech skinny_tech = {
	.type = "Skinny",
	.description = tdesc,
	.capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
	.properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
	.requester = skinny_request,
	.call = skinny_call,
	.hangup = skinny_hangup,
	.answer = skinny_answer,
	.read = skinny_read,
	.write = skinny_write,
	.indicate = skinny_indicate,
	.fixup = skinny_fixup,
	.send_digit_begin = skinny_senddigit_begin,
	.send_digit_end = skinny_senddigit_end,
/*	.bridge = ast_rtp_bridge, */
};

static void *get_button_template(struct skinnysession *s, struct button_definition_template *btn)
{
	struct skinny_device *d = s->device;
	struct skinny_addon *a = d->addons;
	int i;

	switch (d->type) {
		case SKINNY_DEVICE_30SPPLUS:
		case SKINNY_DEVICE_30VIP:
			/* 13 rows, 2 columns */
			for (i = 0; i < 4; i++)
				(btn++)->buttonDefinition = BT_LINE;
			(btn++)->buttonDefinition = BT_REDIAL;
			(btn++)->buttonDefinition = BT_VOICEMAIL;
			(btn++)->buttonDefinition = BT_CALLPARK;
			(btn++)->buttonDefinition = BT_FORWARDALL;
			(btn++)->buttonDefinition = BT_CONFERENCE;
			for (i = 0; i < 4; i++)
				(btn++)->buttonDefinition = BT_NONE;
			for (i = 0; i < 13; i++)
				(btn++)->buttonDefinition = BT_SPEEDDIAL;
			
			break;
		case SKINNY_DEVICE_12SPPLUS:
		case SKINNY_DEVICE_12SP:
		case SKINNY_DEVICE_12:
			/* 6 rows, 2 columns */
			for (i = 0; i < 2; i++)
				(btn++)->buttonDefinition = BT_LINE;
			(btn++)->buttonDefinition = BT_REDIAL;
			for (i = 0; i < 3; i++)
				(btn++)->buttonDefinition = BT_SPEEDDIAL;
			(btn++)->buttonDefinition = BT_HOLD;
			(btn++)->buttonDefinition = BT_TRANSFER;
			(btn++)->buttonDefinition = BT_FORWARDALL;
			(btn++)->buttonDefinition = BT_CALLPARK;
			(btn++)->buttonDefinition = BT_VOICEMAIL;
			(btn++)->buttonDefinition = BT_CONFERENCE;
			break;
		case SKINNY_DEVICE_7910:
			(btn++)->buttonDefinition = BT_LINE;
			(btn++)->buttonDefinition = BT_HOLD;
			(btn++)->buttonDefinition = BT_TRANSFER;
			(btn++)->buttonDefinition = BT_DISPLAY;
			(btn++)->buttonDefinition = BT_VOICEMAIL;
			(btn++)->buttonDefinition = BT_CONFERENCE;
			(btn++)->buttonDefinition = BT_FORWARDALL;
			for (i = 0; i < 2; i++)
				(btn++)->buttonDefinition = BT_SPEEDDIAL;
			(btn++)->buttonDefinition = BT_REDIAL;
			break;
		case SKINNY_DEVICE_7960:
		case SKINNY_DEVICE_7961:
		case SKINNY_DEVICE_7961GE:
		case SKINNY_DEVICE_7962:
		case SKINNY_DEVICE_7965:
			for (i = 0; i < 6; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
			break;
		case SKINNY_DEVICE_7940:
		case SKINNY_DEVICE_7941:
		case SKINNY_DEVICE_7941GE:
		case SKINNY_DEVICE_7942:
		case SKINNY_DEVICE_7945:
			for (i = 0; i < 2; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
			break;
		case SKINNY_DEVICE_7935:
		case SKINNY_DEVICE_7936:
			for (i = 0; i < 2; i++)
				(btn++)->buttonDefinition = BT_LINE;
			break;
		case SKINNY_DEVICE_ATA186:
			(btn++)->buttonDefinition = BT_LINE;
			break;
		case SKINNY_DEVICE_7970:
		case SKINNY_DEVICE_7971:
		case SKINNY_DEVICE_7975:
		case SKINNY_DEVICE_CIPC:
			for (i = 0; i < 8; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
			break;
		case SKINNY_DEVICE_7985:
			/* XXX I have no idea what the buttons look like on these. */
			ast_log(LOG_WARNING, "Unsupported device type '%d (7985)' found.\n", d->type);
			break;
		case SKINNY_DEVICE_7912:
		case SKINNY_DEVICE_7911:
		case SKINNY_DEVICE_7905:
			(btn++)->buttonDefinition = BT_LINE;
			(btn++)->buttonDefinition = BT_HOLD;
			break;
		case SKINNY_DEVICE_7920:
			/* XXX I don't know if this is right. */
			for (i = 0; i < 4; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
			break;
		case SKINNY_DEVICE_7921:
			for (i = 0; i < 6; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
			break;
		case SKINNY_DEVICE_7902:
			ast_log(LOG_WARNING, "Unsupported device type '%d (7902)' found.\n", d->type);
			break;
		case SKINNY_DEVICE_7906:
			ast_log(LOG_WARNING, "Unsupported device type '%d (7906)' found.\n", d->type);
			break;
		case SKINNY_DEVICE_7931:
			ast_log(LOG_WARNING, "Unsupported device type '%d (7931)' found.\n", d->type);
			break;
		case SKINNY_DEVICE_7937:
			ast_log(LOG_WARNING, "Unsupported device type '%d (7937)' found.\n", d->type);
			break;
		case SKINNY_DEVICE_7914:
			ast_log(LOG_WARNING, "Unsupported device type '%d (7914)' found.  Expansion module registered by itself?\n", d->type);
			break;
		case SKINNY_DEVICE_SCCPGATEWAY_AN:
		case SKINNY_DEVICE_SCCPGATEWAY_BRI:
			ast_log(LOG_WARNING, "Unsupported device type '%d (SCCP gateway)' found.\n", d->type);
			break;
		default:
			ast_log(LOG_WARNING, "Unknown device type '%d' found.\n", d->type);
			break;
	}

	for (a = d->addons; a; a = a->next) {
		if (!strcasecmp(a->type, "7914")) {
			for (i = 0; i < 14; i++)
				(btn++)->buttonDefinition = BT_CUST_LINESPEEDDIAL;
		} else {
			ast_log(LOG_WARNING, "Unknown addon type '%s' found.  Skipping.\n", a->type);
		}
	}

	return btn;
}

static struct skinny_req *req_alloc(size_t size, int response_message)
{
	struct skinny_req *req;

	if (!(req = ast_calloc(1, skinny_header_size + size + 4)))
		return NULL;

	req->len = htolel(size+4);
	req->e = htolel(response_message);

	return req;
}

static struct skinny_line *find_line_by_instance(struct skinny_device *d, int instance)
{
	struct skinny_line *l;

	if (!instance)
		instance = 1;

	for (l = d->lines; l; l = l->next) {
		if (l->instance == instance)
			break;
	}

	if (!l) {
		ast_log(LOG_WARNING, "Could not find line with instance '%d' on device '%s'\n", instance, d->name);
	}
	return l;
}

static struct skinny_line *find_line_by_name(const char *dest)
{
	struct skinny_line *l;
	struct skinny_device *d;
	char line[256];
	char *at;
	char *device;

	ast_copy_string(line, dest, sizeof(line));
	at = strchr(line, '@');
	if (!at) {
		ast_log(LOG_NOTICE, "Device '%s' has no @ (at) sign!\n", dest);
		return NULL;
	}
	*at++ = '\0';
	device = at;
	ast_mutex_lock(&devicelock);
	for (d = devices; d; d = d->next) {
		if (!strcasecmp(d->name, device)) {
			if (skinnydebug)
				ast_verbose("Found device: %s\n", d->name);
			/* Found the device */
			for (l = d->lines; l; l = l->next) {
				/* Search for the right line */
				if (!strcasecmp(l->name, line)) {
					ast_mutex_unlock(&devicelock);
					return l;
				}
			}
		}
	}
	/* Device not found */
	ast_mutex_unlock(&devicelock);
	return NULL;
}

/* It's quicker/easier to find the subchannel when we know the instance number too */
static struct skinny_subchannel *find_subchannel_by_instance_reference(struct skinny_device *d, int instance, int reference)
{
	struct skinny_line *l = find_line_by_instance(d, instance);
	struct skinny_subchannel *sub;

	if (!l) {
		return NULL;
	}

	if (!reference)
		sub = l->sub;
	else {
		for (sub = l->sub; sub; sub = sub->next) {
			if (sub->callid == reference)
				break;
		}
	}

	if (!sub) {
		ast_log(LOG_WARNING, "Could not find subchannel with reference '%d' on '%s'\n", reference, d->name);
	}
	return sub;
}

/* Find the subchannel when we only have the callid - this shouldn't happen often */
static struct skinny_subchannel *find_subchannel_by_reference(struct skinny_device *d, int reference)
{
	struct skinny_line *l;
	struct skinny_subchannel *sub = NULL;

	for (l = d->lines; l; l = l->next) {
		for (sub = l->sub; sub; sub = sub->next) {
			if (sub->callid == reference)
				break;
		}
		if (sub)
			break;
	}

	if (!l) {
		ast_log(LOG_WARNING, "Could not find any lines that contained a subchannel with reference '%d' on device '%s'\n", reference, d->name);
	} else {
		if (!sub) {
			ast_log(LOG_WARNING, "Could not find subchannel with reference '%d' on '%s@%s'\n", reference, l->name, d->name);
		}
	}
	return sub;
}

static struct skinny_speeddial *find_speeddial_by_instance(struct skinny_device *d, int instance)
{
	struct skinny_speeddial *sd;

	for (sd = d->speeddials; sd; sd = sd->next) {
		if (sd->instance == instance)
			break;
	}

	if (!sd) {
		ast_log(LOG_WARNING, "Could not find speeddial with instance '%d' on device '%s'\n", instance, d->name);
	}
	return sd;
}

static int codec_skinny2ast(enum skinny_codecs skinnycodec)
{
	switch (skinnycodec) {
	case SKINNY_CODEC_ALAW:
		return AST_FORMAT_ALAW;
	case SKINNY_CODEC_ULAW:
		return AST_FORMAT_ULAW;
	case SKINNY_CODEC_G723_1:
		return AST_FORMAT_G723_1;
	case SKINNY_CODEC_G729A:
		return AST_FORMAT_G729A;
	case SKINNY_CODEC_G726_32:
		return AST_FORMAT_G726_AAL2; /* XXX Is this right? */
	case SKINNY_CODEC_H261:
		return AST_FORMAT_H261;
	case SKINNY_CODEC_H263:
		return AST_FORMAT_H263;
	default:
		return 0;
	}
}

static int codec_ast2skinny(int astcodec)
{
	switch (astcodec) {
	case AST_FORMAT_ALAW:
		return SKINNY_CODEC_ALAW;
	case AST_FORMAT_ULAW:
		return SKINNY_CODEC_ULAW;
	case AST_FORMAT_G723_1:
		return SKINNY_CODEC_G723_1;
	case AST_FORMAT_G729A:
		return SKINNY_CODEC_G729A;
	case AST_FORMAT_G726_AAL2: /* XXX Is this right? */
		return SKINNY_CODEC_G726_32;
	case AST_FORMAT_H261:
		return SKINNY_CODEC_H261;
	case AST_FORMAT_H263:
		return SKINNY_CODEC_H263;
	default:
		return 0;
	}
}


static int skinny_register(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d;
	struct sockaddr_in sin;
	socklen_t slen;

	ast_mutex_lock(&devicelock);
	for (d = devices; d; d = d->next) {
		if (!strcasecmp(req->data.reg.name, d->id)
				&& ast_apply_ha(d->ha, &(s->sin))) {
			s->device = d;
			d->type = letohl(req->data.reg.type);
			if (ast_strlen_zero(d->version_id)) {
				ast_copy_string(d->version_id, version_id, sizeof(d->version_id));
			}
			d->registered = 1;
			d->session = s;

			slen = sizeof(sin);
			if (getsockname(s->fd, (struct sockaddr *)&sin, &slen)) {
				ast_log(LOG_WARNING, "Cannot get socket name\n");
				sin.sin_addr = __ourip;
			}
			d->ourip = sin.sin_addr;
			break;
		}
	}
	ast_mutex_unlock(&devicelock);
	if (!d) {
		return 0;
	}
	return 1;
}

static int skinny_unregister(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d;

	d = s->device;

	if (d) {
		d->session = NULL;
		d->registered = 0;
	}

	return -1; /* main loop will destroy the session */
}

static int transmit_response(struct skinnysession *s, struct skinny_req *req)
{
	int res = 0;

	if (!s) {
		ast_log(LOG_WARNING, "Asked to transmit to a non-existant session!\n");
		return -1;
	}

	ast_mutex_lock(&s->lock);

	if (skinnydebug)
		ast_log(LOG_VERBOSE, "writing packet type %04X (%d bytes) to socket %d\n", letohl(req->e), letohl(req->len)+8, s->fd);

	if (letohl(req->len > SKINNY_MAX_PACKET) || letohl(req->len < 0)) {
		ast_log(LOG_WARNING, "transmit_response: the length of the request is out of bounds\n");
		ast_mutex_unlock(&s->lock);
		return -1;
	}

	memset(s->outbuf,0,sizeof(s->outbuf));
	memcpy(s->outbuf, req, skinny_header_size);
	memcpy(s->outbuf+skinny_header_size, &req->data, letohl(req->len));

	res = write(s->fd, s->outbuf, letohl(req->len)+8);

	if (res != letohl(req->len)+8) {
		ast_log(LOG_WARNING, "Transmit: write only sent %d out of %d bytes: %s\n", res, letohl(req->len)+8, strerror(errno));
		if (res == -1) {
			if (skinnydebug)
				ast_log(LOG_WARNING, "Transmit: Skinny Client was lost, unregistering\n");
			skinny_unregister(NULL, s);
		}
		
	}
	
	ast_mutex_unlock(&s->lock);
	return 1;
}

static void transmit_speaker_mode(struct skinnysession *s, int mode)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct set_speaker_message), SET_SPEAKER_MESSAGE)))
		return;

	req->data.setspeaker.mode = htolel(mode);
	transmit_response(s, req);
}
/*
static void transmit_microphone_mode(struct skinnysession *s, int mode)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct set_microphone_message), SET_MICROPHONE_MESSAGE)))
		return;

	req->data.setmicrophone.mode = htolel(mode);
	transmit_response(s, req);
}
*/

static void transmit_callinfo(struct skinnysession *s, const char *fromname, const char *fromnum, const char *toname, const char *tonum, int instance, int callid, int calltype)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct call_info_message), CALL_INFO_MESSAGE)))
		return;

	if (skinnydebug)
			ast_verbose("Setting Callinfo to %s(%s) from %s(%s) on %s(%d)\n", fromname, fromnum, toname, tonum, s->device->name, instance);

	if (fromname) {
		ast_copy_string(req->data.callinfo.callingPartyName, fromname, sizeof(req->data.callinfo.callingPartyName));
	}
	if (fromnum) {
		ast_copy_string(req->data.callinfo.callingParty, fromnum, sizeof(req->data.callinfo.callingParty));
	}
	if (toname) {
		ast_copy_string(req->data.callinfo.calledPartyName, toname, sizeof(req->data.callinfo.calledPartyName));
	}
	if (tonum) {
		ast_copy_string(req->data.callinfo.calledParty, tonum, sizeof(req->data.callinfo.calledParty));
	}
	req->data.callinfo.instance = htolel(instance);
	req->data.callinfo.reference = htolel(callid);
	req->data.callinfo.type = htolel(calltype);
	transmit_response(s, req);
}

static void transmit_connect(struct skinnysession *s, struct skinny_subchannel *sub)
{
	struct skinny_req *req;
	struct skinny_line *l = sub->parent;
	struct ast_format_list fmt;

	if (!(req = req_alloc(sizeof(struct open_receive_channel_message), OPEN_RECEIVE_CHANNEL_MESSAGE)))
		return;

	fmt = ast_codec_pref_getsize(&l->prefs, ast_best_codec(l->capability));

	req->data.openreceivechannel.conferenceId = htolel(sub->callid);
	req->data.openreceivechannel.partyId = htolel(sub->callid);
	req->data.openreceivechannel.packets = htolel(fmt.cur_ms);
	req->data.openreceivechannel.capability = htolel(codec_ast2skinny(fmt.bits));
	req->data.openreceivechannel.echo = htolel(0);
	req->data.openreceivechannel.bitrate = htolel(0);
	transmit_response(s, req);
}

static void transmit_tone(struct skinnysession *s, int tone, int instance, int reference)
{
	struct skinny_req *req;

	if (tone == SKINNY_NOTONE) {
		/* This is bad, mmm'kay? */
		return;
	}

	if (tone > 0) {
		if (!(req = req_alloc(sizeof(struct start_tone_message), START_TONE_MESSAGE)))
			return;
		req->data.starttone.tone = htolel(tone);
		req->data.starttone.instance = htolel(instance);
		req->data.starttone.reference = htolel(reference);
	} else {
		if (!(req = req_alloc(sizeof(struct stop_tone_message), STOP_TONE_MESSAGE)))
			return;
		req->data.stoptone.instance = htolel(instance);
		req->data.stoptone.reference = htolel(reference);
	}

	if (tone > 0) {
		req->data.starttone.tone = htolel(tone);
	}
	transmit_response(s, req);
}

static void transmit_selectsoftkeys(struct skinnysession *s, int instance, int callid, int softkey)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct select_soft_keys_message), SELECT_SOFT_KEYS_MESSAGE)))
		return;

	req->data.selectsoftkey.instance = htolel(instance);
	req->data.selectsoftkey.reference = htolel(callid);
	req->data.selectsoftkey.softKeySetIndex = htolel(softkey);
	req->data.selectsoftkey.validKeyMask = htolel(0xFFFFFFFF);
	transmit_response(s, req);
}

static void transmit_lamp_indication(struct skinnysession *s, int stimulus, int instance, int indication)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct set_lamp_message), SET_LAMP_MESSAGE)))
		return;

	req->data.setlamp.stimulus = htolel(stimulus);
	req->data.setlamp.stimulusInstance = htolel(instance);
	req->data.setlamp.deviceStimulus = htolel(indication);
	transmit_response(s, req);
}

static void transmit_ringer_mode(struct skinnysession *s, int mode)
{
	struct skinny_req *req;

	if (skinnydebug)
		ast_verbose("Setting ringer mode to '%d'.\n", mode);

	if (!(req = req_alloc(sizeof(struct set_ringer_message), SET_RINGER_MESSAGE)))
		return;

	req->data.setringer.ringerMode = htolel(mode);
	/* XXX okay, I don't quite know what this is, but here's what happens (on a 7960).
	   Note: The phone will always show as ringing on the display.

	   1: phone will audibly ring over and over
	   2: phone will audibly ring only once
	   any other value, will NOT cause the phone to audibly ring
	*/
	req->data.setringer.unknown1 = htolel(1);
	/* XXX the value here doesn't seem to change anything.  Must be higher than 0.
	   Perhaps a packet capture can shed some light on this. */
	req->data.setringer.unknown2 = htolel(1);
	transmit_response(s, req);
}

static void transmit_displaymessage(struct skinnysession *s, const char *text, int instance, int reference)
{
	struct skinny_req *req;

	if (text == 0) {
		if (!(req = req_alloc(0, CLEAR_DISPLAY_MESSAGE)))
			return;

		req->data.clearpromptstatus.lineInstance = instance;
		req->data.clearpromptstatus.callReference = reference;

		if (skinnydebug)
			ast_verbose("Clearing Display\n");
	} else {
		if (!(req = req_alloc(sizeof(struct displaytext_message), DISPLAYTEXT_MESSAGE)))
			return;

		ast_copy_string(req->data.displaytext.text, text, sizeof(req->data.displaytext.text));
		if (skinnydebug)
			ast_verbose("Displaying message '%s'\n", req->data.displaytext.text);
	}

	transmit_response(s, req);
}

static void transmit_displaynotify(struct skinnysession *s, const char *text, int t)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct display_notify_message), DISPLAY_NOTIFY_MESSAGE)))
		return;

	ast_copy_string(req->data.displaynotify.displayMessage, text, sizeof(req->data.displaynotify.displayMessage));
	req->data.displaynotify.displayTimeout = htolel(t);

	if (skinnydebug)
		ast_verbose("Displaying notify '%s'\n", text);

	transmit_response(s, req);
}

static void transmit_displaypromptstatus(struct skinnysession *s, const char *text, int t, int instance, int callid)
{
	struct skinny_req *req;

	if (text == 0) {
		if (!(req = req_alloc(sizeof(struct clear_prompt_message), CLEAR_PROMPT_MESSAGE)))
			return;

		req->data.clearpromptstatus.lineInstance = htolel(instance);
		req->data.clearpromptstatus.callReference = htolel(callid);

		if (skinnydebug)
			ast_verbose("Clearing Prompt\n");
	} else {
		if (!(req = req_alloc(sizeof(struct display_prompt_status_message), DISPLAY_PROMPT_STATUS_MESSAGE)))
			return;

		ast_copy_string(req->data.displaypromptstatus.promptMessage, text, sizeof(req->data.displaypromptstatus.promptMessage));
		req->data.displaypromptstatus.messageTimeout = htolel(t);
		req->data.displaypromptstatus.lineInstance = htolel(instance);
		req->data.displaypromptstatus.callReference = htolel(callid);

		if (skinnydebug)
			ast_verbose("Displaying Prompt Status '%s'\n", text);
	}

	transmit_response(s, req);
}

static void transmit_dialednumber(struct skinnysession *s, const char *text, int instance, int callid)
{
	struct skinny_req *req;

	if (!(req = req_alloc(sizeof(struct dialed_number_message), DIALED_NUMBER_MESSAGE)))
		return;

	ast_copy_string(req->data.dialednumber.dialedNumber, text, sizeof(req->data.dialednumber.dialedNumber));
	req->data.dialednumber.lineInstance = htolel(instance);
	req->data.dialednumber.callReference = htolel(callid);

	transmit_response(s, req);
}

static void transmit_callstate(struct skinnysession *s, int instance, int state, unsigned callid)
{
	struct skinny_req *req;

	if (state == SKINNY_ONHOOK) {
		if (!(req = req_alloc(sizeof(struct close_receive_channel_message), CLOSE_RECEIVE_CHANNEL_MESSAGE)))
			return;

		req->data.closereceivechannel.conferenceId = htolel(callid);
		req->data.closereceivechannel.partyId = htolel(callid);
		transmit_response(s, req);

		if (!(req = req_alloc(sizeof(struct stop_media_transmission_message), STOP_MEDIA_TRANSMISSION_MESSAGE)))
			return;

		req->data.stopmedia.conferenceId = htolel(callid);
		req->data.stopmedia.passThruPartyId = htolel(callid);
		transmit_response(s, req);

		transmit_speaker_mode(s, SKINNY_SPEAKEROFF);

		transmit_displaypromptstatus(s, NULL, 0, instance, callid);
	}

	if (!(req = req_alloc(sizeof(struct call_state_message), CALL_STATE_MESSAGE)))
		return;

	req->data.callstate.callState = htolel(state);
	req->data.callstate.lineInstance = htolel(instance);
	req->data.callstate.callReference = htolel(callid);
	transmit_response(s, req);

	if (state == SKINNY_ONHOOK) {
		transmit_selectsoftkeys(s, 0, 0, KEYDEF_ONHOOK);
	}

	if (state == SKINNY_OFFHOOK || state == SKINNY_ONHOOK) {
		if (!(req = req_alloc(sizeof(struct activate_call_plane_message), ACTIVATE_CALL_PLANE_MESSAGE)))
			return;

		req->data.activatecallplane.lineInstance = htolel(instance);
		transmit_response(s, req);
	}
}

/*
static int has_voicemail(struct skinny_line *l)
{
	return ast_app_has_voicemail(l->mailbox, NULL);
}
*/

static void do_housekeeping(struct skinnysession *s)
{
/*
	int new;
	int old;
	struct skinny_device *d = s->device;
	struct skinny_line *l;
*/

	/* Update time on device */
	handle_time_date_req_message(NULL, s);

/*
	for (l = d->lines; l; l = l->next) {
		if (has_voicemail(l)) {
			if (skinnydebug)
				ast_verbose("Checking for voicemail Skinny %s@%s\n", l->name, d->name);
			ast_app_inboxcount(l->mailbox, &new, &old);
			if (skinnydebug)
				ast_verbose("Skinny %s@%s has voicemail!\n", l->name, d->name);
			transmit_lamp_indication(s, STIMULUS_VOICEMAIL, l->instance, l->mwiblink?SKINNY_LAMP_BLINK:SKINNY_LAMP_ON);
		} else {
			transmit_lamp_indication(s, STIMULUS_VOICEMAIL, l->instance, SKINNY_LAMP_OFF);
		}
	}
*/
}

/* I do not believe skinny can deal with video.
   Anyone know differently? */
/* Yes, it can.  Currently 7985 and Cisco VT Advantage do video. */
static enum ast_rtp_get_result skinny_get_vrtp_peer(struct ast_channel *c, struct ast_rtp **rtp)
{
	struct skinny_subchannel *sub = NULL;

	if (!(sub = c->tech_pvt) || !(sub->vrtp))
		return AST_RTP_GET_FAILED;

	*rtp = sub->vrtp;

	return AST_RTP_TRY_NATIVE;
}

static enum ast_rtp_get_result skinny_get_rtp_peer(struct ast_channel *c, struct ast_rtp **rtp)
{
	struct skinny_subchannel *sub = NULL;

	if (!(sub = c->tech_pvt) || !(sub->rtp))
		return AST_RTP_GET_FAILED;

	*rtp = sub->rtp;

	return AST_RTP_TRY_NATIVE;
}

static int skinny_set_rtp_peer(struct ast_channel *c, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
{
	struct skinny_subchannel *sub;
	sub = c->tech_pvt;
	if (sub) {
		/* transmit_modify_with_sdp(sub, rtp); @@FIXME@@ if needed */
		return 0;
	}
	return -1;
}

static struct ast_rtp_protocol skinny_rtp = {
	.type = "Skinny",
	.get_rtp_info = skinny_get_rtp_peer,
	.get_vrtp_info = skinny_get_vrtp_peer,
	.set_rtp_peer = skinny_set_rtp_peer,
};

static int skinny_do_debug(int fd, int argc, char *argv[])
{
	if (argc != 3) {
		return RESULT_SHOWUSAGE;
	}
	skinnydebug = 1;
	ast_cli(fd, "Skinny Debugging Enabled\n");
	return RESULT_SUCCESS;
}

static int skinny_no_debug(int fd, int argc, char *argv[])
{
	if (argc != 4) {
		return RESULT_SHOWUSAGE;
	}
	skinnydebug = 0;
	ast_cli(fd, "Skinny Debugging Disabled\n");
	return RESULT_SUCCESS;
}

static char *complete_skinny_reset(const char *line, const char *word, int pos, int state)
{
	struct skinny_device *d;

	char *result = NULL;
	int wordlen = strlen(word);
	int which = 0;

	if (pos == 2) {
		for (d = devices; d && !result; d = d->next) {
			if (!strncasecmp(word, d->id, wordlen) && ++which > state)
				result = ast_strdup(d->id);
		}
	}

	return result;
}

static int skinny_reset_device(int fd, int argc, char *argv[])
{
	struct skinny_device *d;
	struct skinny_req *req;

	if (argc < 3 || argc > 4) {
		return RESULT_SHOWUSAGE;
	}
	ast_mutex_lock(&devicelock);

	for (d = devices; d; d = d->next) {
		int fullrestart = 0;
		if (!strcasecmp(argv[2], d->id) || !strcasecmp(argv[2], "all")) {
			if (!(d->session))
				continue;

			if (!(req = req_alloc(sizeof(struct reset_message), RESET_MESSAGE)))
				continue;

			if (argc == 4 && !strcasecmp(argv[3], "restart"))
				fullrestart = 1;

			if (fullrestart)
				req->data.reset.resetType = 2;
			else
				req->data.reset.resetType = 1;

			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "%s device %s.\n", (fullrestart) ? "Restarting" : "Resetting", d->id);
			transmit_response(d->session, req);
		}
	}
	ast_mutex_unlock(&devicelock);
	return RESULT_SUCCESS;
}

static char *device2str(int type)
{
	char *tmp;

	switch (type) {
	case SKINNY_DEVICE_NONE:
		return "No Device";
	case SKINNY_DEVICE_30SPPLUS:
		return "30SP Plus";
	case SKINNY_DEVICE_12SPPLUS:
		return "12SP Plus";
	case SKINNY_DEVICE_12SP:
		return "12SP";
	case SKINNY_DEVICE_12:
		return "12";
	case SKINNY_DEVICE_30VIP:
		return "30VIP";
	case SKINNY_DEVICE_7910:
		return "7910";
	case SKINNY_DEVICE_7960:
		return "7960";
	case SKINNY_DEVICE_7940:
		return "7940";
	case SKINNY_DEVICE_7935:
		return "7935";
	case SKINNY_DEVICE_ATA186:
		return "ATA186";
	case SKINNY_DEVICE_7941:
		return "7941";
	case SKINNY_DEVICE_7971:
		return "7971";
	case SKINNY_DEVICE_7914:
		return "7914";
	case SKINNY_DEVICE_7985:
		return "7985";
	case SKINNY_DEVICE_7911:
		return "7911";
	case SKINNY_DEVICE_7961GE:
		return "7961GE";
	case SKINNY_DEVICE_7941GE:
		return "7941GE";
	case SKINNY_DEVICE_7931:
		return "7931";
	case SKINNY_DEVICE_7921:
		return "7921";
	case SKINNY_DEVICE_7906:
		return "7906";
	case SKINNY_DEVICE_7962:
		return "7962";
	case SKINNY_DEVICE_7937:
		return "7937";
	case SKINNY_DEVICE_7942:
		return "7942";
	case SKINNY_DEVICE_7945:
		return "7945";
	case SKINNY_DEVICE_7965:
		return "7965";
	case SKINNY_DEVICE_7975:
		return "7975";
	case SKINNY_DEVICE_7905:
		return "7905";
	case SKINNY_DEVICE_7920:
		return "7920";
	case SKINNY_DEVICE_7970:
		return "7970";
	case SKINNY_DEVICE_7912:
		return "7912";
	case SKINNY_DEVICE_7902:
		return "7902";
	case SKINNY_DEVICE_CIPC:
		return "IP Communicator";
	case SKINNY_DEVICE_7961:
		return "7961";
	case SKINNY_DEVICE_7936:
		return "7936";
	case SKINNY_DEVICE_SCCPGATEWAY_AN:
		return "SCCPGATEWAY_AN";
	case SKINNY_DEVICE_SCCPGATEWAY_BRI:
		return "SCCPGATEWAY_BRI";
	case SKINNY_DEVICE_UNKNOWN:
		return "Unknown";
	default:
		if (!(tmp = ast_threadstorage_get(&device2str_threadbuf, DEVICE2STR_BUFSIZE)))
			return "Unknown";
		snprintf(tmp, DEVICE2STR_BUFSIZE, "UNKNOWN-%d", type);
		return tmp;
	}
}

static int skinny_show_devices(int fd, int argc, char *argv[])
{
	struct skinny_device *d;
	struct skinny_line *l;
	int numlines = 0;

	if (argc != 3) {
		return RESULT_SHOWUSAGE;
	}
	ast_mutex_lock(&devicelock);

	ast_cli(fd, "Name                 DeviceId         IP              Type            R NL\n");
	ast_cli(fd, "-------------------- ---------------- --------------- --------------- - --\n");
	for (d = devices; d; d = d->next) {
		numlines = 0;
		for (l = d->lines; l; l = l->next) {
			numlines++;
		}

		ast_cli(fd, "%-20s %-16s %-15s %-15s %c %2d\n",
				d->name,
				d->id,
				d->session?ast_inet_ntoa(d->session->sin.sin_addr):"",
				device2str(d->type),
				d->registered?'Y':'N',
				numlines);
	}
	ast_mutex_unlock(&devicelock);
	return RESULT_SUCCESS;
}

static int skinny_show_lines(int fd, int argc, char *argv[])
{
	struct skinny_device *d;
	struct skinny_line *l;

	if (argc != 3) {
		return RESULT_SHOWUSAGE;
	}
	ast_mutex_lock(&devicelock);

	ast_cli(fd, "Device Name          Instance Name                 Label               \n");
	ast_cli(fd, "-------------------- -------- -------------------- --------------------\n");
	for (d = devices; d; d = d->next) {
		for (l = d->lines; l; l = l->next) {
			ast_cli(fd, "%-20s %8d %-20s %-20s\n",
				d->name,
				l->instance,
				l->name,
				l->label);
		}
	}

	ast_mutex_unlock(&devicelock);
	return RESULT_SUCCESS;
}

static char show_devices_usage[] =
"Usage: skinny show devices\n"
"       Lists all devices known to the Skinny subsystem.\n";

static char show_lines_usage[] =
"Usage: skinny show lines\n"
"       Lists all lines known to the Skinny subsystem.\n";

static char debug_usage[] =
"Usage: skinny set debug\n"
"       Enables dumping of Skinny packets for debugging purposes\n";

static char no_debug_usage[] =
"Usage: skinny set debug off\n"
"       Disables dumping of Skinny packets for debugging purposes\n";

static char reset_usage[] =
"Usage: skinny reset <DeviceId|all> [restart]\n"
"       Causes a Skinny device to reset itself, optionally with a full restart\n";

static struct ast_cli_entry cli_skinny[] = {
	{ { "skinny", "show", "devices", NULL },
	skinny_show_devices, "List defined Skinny devices",
	show_devices_usage },

	{ { "skinny", "show", "lines", NULL },
	skinny_show_lines, "List defined Skinny lines per device",
	show_lines_usage },

	{ { "skinny", "set", "debug", NULL },
	skinny_do_debug, "Enable Skinny debugging",
	debug_usage },

	{ { "skinny", "set", "debug", "off", NULL },
	skinny_no_debug, "Disable Skinny debugging",
	no_debug_usage },

	{ { "skinny", "reset", NULL },
	skinny_reset_device, "Reset Skinny device(s)",
	reset_usage, complete_skinny_reset },
};

#if 0
static struct skinny_paging_device *build_paging_device(const char *cat, struct ast_variable *v)
{
	return NULL;
}
#endif

static struct skinny_device *build_device(const char *cat, struct ast_variable *v)
{
	struct skinny_device *d;
	struct skinny_line *l;
	struct skinny_speeddial *sd;
	struct skinny_addon *a;
	int lineInstance = 1;
	int speeddialInstance = 1;
	int y = 0;

	if (!(d = ast_calloc(1, sizeof(struct skinny_device)))) {
		return NULL;
	} else {
		ast_copy_string(d->name, cat, sizeof(d->name));
		d->lastlineinstance = 1;
		d->capability = default_capability;
		d->prefs = default_prefs;
		d->earlyrtp = 1;
		while(v) {
			if (!strcasecmp(v->name, "host")) {
				if (ast_get_ip(&d->addr, v->value)) {
					free(d);
					return NULL;
				}
			} else if (!strcasecmp(v->name, "port")) {
				d->addr.sin_port = htons(atoi(v->value));
			} else if (!strcasecmp(v->name, "device")) {
				ast_copy_string(d->id, v->value, sizeof(d->id));
			} else if (!strcasecmp(v->name, "permit") || !strcasecmp(v->name, "deny")) {
				d->ha = ast_append_ha(v->name, v->value, d->ha);
			} else if (!strcasecmp(v->name, "context")) {
				ast_copy_string(context, v->value, sizeof(context));
			} else if (!strcasecmp(v->name, "allow")) {
				ast_parse_allow_disallow(&d->prefs, &d->capability, v->value, 1);
			} else if (!strcasecmp(v->name, "disallow")) {
				ast_parse_allow_disallow(&d->prefs, &d->capability, v->value, 0);
			} else if (!strcasecmp(v->name, "version")) {
				ast_copy_string(d->version_id, v->value, sizeof(d->version_id));
			} else if (!strcasecmp(v->name, "earlyrtp")) {
				d->earlyrtp = ast_true(v->value);
			} else if (!strcasecmp(v->name, "nat")) {
				nat = ast_true(v->value);
			} else if (!strcasecmp(v->name, "callerid")) {
				if (!strcasecmp(v->value, "asreceived")) {
					cid_num[0] = '\0';
					cid_name[0] = '\0';
				} else {
					ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
				}
			} else if (!strcasecmp(v->name, "language")) {
				ast_copy_string(language, v->value, sizeof(language));
			} else if (!strcasecmp(v->name, "accountcode")) {
				ast_copy_string(accountcode, v->value, sizeof(accountcode));
			} else if (!strcasecmp(v->name, "amaflags")) {
				y = ast_cdr_amaflags2int(v->value);
				if (y < 0) {
					ast_log(LOG_WARNING, "Invalid AMA flags: %s at line %d\n", v->value, v->lineno);
				} else {
					amaflags = y;
				}
			} else if (!strcasecmp(v->name, "mohinterpret") || !strcasecmp(v->name, "musiconhold")) {
				ast_copy_string(mohinterpret, v->value, sizeof(mohinterpret));
			} else if (!strcasecmp(v->name, "mohsuggest")) {
				ast_copy_string(mohsuggest, v->value, sizeof(mohsuggest));
			} else if (!strcasecmp(v->name, "callgroup")) {
				cur_callergroup = ast_get_group(v->value);
			} else if (!strcasecmp(v->name, "pickupgroup")) {
				cur_pickupgroup = ast_get_group(v->value);
			} else if (!strcasecmp(v->name, "immediate")) {
				immediate = ast_true(v->value);
			} else if (!strcasecmp(v->name, "cancallforward")) {
				cancallforward = ast_true(v->value);
			} else if (!strcasecmp(v->name, "mailbox")) {
				ast_copy_string(mailbox, v->value, sizeof(mailbox));
			} else if (!strcasecmp(v->name, "hasvoicemail")) {
				if (ast_true(v->value) && ast_strlen_zero(mailbox)) {
					ast_copy_string(mailbox, cat, sizeof(mailbox));
				}
			} else if (!strcasecmp(v->name, "callreturn")) {
				callreturn = ast_true(v->value);
			} else if (!strcasecmp(v->name, "callwaiting")) {
				callwaiting = ast_true(v->value);
			} else if (!strcasecmp(v->name, "transfer")) {
				transfer = ast_true(v->value);
			} else if (!strcasecmp(v->name, "threewaycalling")) {
				threewaycalling = ast_true(v->value);
			} else if (!strcasecmp(v->name, "mwiblink")) {
				mwiblink = ast_true(v->value);
			} else if (!strcasecmp(v->name, "linelabel")) {
				ast_copy_string(linelabel, v->value, sizeof(linelabel));
			} else if (!strcasecmp(v->name, "speeddial")) {
				if (!(sd = ast_calloc(1, sizeof(struct skinny_speeddial)))) {
					return NULL;
				} else {
					char *stringp, *exten, *label;
					stringp = v->value;
					exten = strsep(&stringp, ",");
					label = strsep(&stringp, ",");
					ast_mutex_init(&sd->lock);
					ast_copy_string(sd->exten, exten, sizeof(sd->exten));
					if (label)
						ast_copy_string(sd->label, label, sizeof(sd->label));
					else
						ast_copy_string(sd->label, exten, sizeof(sd->label));
					sd->instance = speeddialInstance++;

					sd->parent = d;

					sd->next = d->speeddials;
					d->speeddials = sd;
				}
			} else if (!strcasecmp(v->name, "addon")) {
				if (!(a = ast_calloc(1, sizeof(struct skinny_addon)))) {
					return NULL;
				} else {
					ast_mutex_init(&a->lock);
					ast_copy_string(a->type, v->value, sizeof(a->type));

					a->next = d->addons;
					d->addons = a;
				}
			} else if (!strcasecmp(v->name, "trunk") || !strcasecmp(v->name, "line")) {
				if (!(l = ast_calloc(1, sizeof(struct skinny_line)))) {
					return NULL;
				} else {
					ast_mutex_init(&l->lock);
					ast_copy_string(l->name, v->value, sizeof(l->name));

					/* XXX Should we check for uniqueness?? XXX */
					ast_copy_string(l->context, context, sizeof(l->context));
					ast_copy_string(l->cid_num, cid_num, sizeof(l->cid_num));
					ast_copy_string(l->cid_name, cid_name, sizeof(l->cid_name));
					ast_copy_string(l->label, linelabel, sizeof(l->label));
					ast_copy_string(l->language, language, sizeof(l->language));
					ast_copy_string(l->mohinterpret, mohinterpret, sizeof(l->mohinterpret));
					ast_copy_string(l->mohsuggest, mohsuggest, sizeof(l->mohsuggest));
					ast_copy_string(l->mailbox, mailbox, sizeof(l->mailbox));
					if (!ast_strlen_zero(mailbox)) {
						if (option_verbose > 2)
							ast_verbose(VERBOSE_PREFIX_3 "Setting mailbox '%s' on %s@%s\n", mailbox, d->name, l->name);
					}
					l->msgstate = -1;
					l->capability = d->capability;
					l->prefs = d->prefs;
					l->parent = d;
					if (!strcasecmp(v->name, "trunk")) {
						l->type = TYPE_TRUNK;
					} else {
						l->type = TYPE_LINE;
					}
					l->immediate = immediate;
					l->callgroup = cur_callergroup;
					l->pickupgroup = cur_pickupgroup;
					l->callreturn = callreturn;
					l->cancallforward = cancallforward;
					l->callwaiting = callwaiting;
					l->transfer = transfer;
					l->threewaycalling = threewaycalling;
					l->mwiblink = mwiblink;
					l->onhooktime = time(NULL);
					l->instance = lineInstance++;
					/* ASSUME we're onhook at this point */
					l->hookstate = SKINNY_ONHOOK;
					l->nat = nat;

					l->next = d->lines;
					d->lines = l;
				}
			} else {
				ast_log(LOG_WARNING, "Don't know keyword '%s' at line %d\n", v->name, v->lineno);
			}
			v = v->next;
	 	}

	 	if (!d->lines) {
			ast_log(LOG_ERROR, "A Skinny device must have at least one line!\n");
			return NULL;
		}
		if (/*d->addr.sin_addr.s_addr && */!ntohs(d->addr.sin_port)) {
			d->addr.sin_port = htons(DEFAULT_SKINNY_PORT);
		}
#if 0
		/* I don't think we need this anymore at all, since d->ourip is set in skinny_register now */
		if (d->addr.sin_addr.s_addr) {
			/* XXX See note above, in 'host' option. */
			if (ast_ouraddrfor(&d->addr.sin_addr, &d->ourip)) {
				d->ourip = __ourip;
			}
		} else {
			d->ourip = __ourip;
		}
#endif
	}
	return d;
}

static void start_rtp(struct skinny_subchannel *sub)
{
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	int hasvideo = 0;

	ast_mutex_lock(&sub->lock);
	/* Allocate the RTP */
	sub->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
	if (hasvideo)
		sub->vrtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
	
	if (sub->rtp && sub->owner) {
		sub->owner->fds[0] = ast_rtp_fd(sub->rtp);
		sub->owner->fds[1] = ast_rtcp_fd(sub->rtp);
	}
	if (hasvideo && sub->vrtp && sub->owner) {
		sub->owner->fds[2] = ast_rtp_fd(sub->vrtp);
		sub->owner->fds[3] = ast_rtcp_fd(sub->vrtp);
	}
	if (sub->rtp) {
		ast_rtp_setnat(sub->rtp, l->nat);
	}
	if (sub->vrtp) {
		ast_rtp_setnat(sub->vrtp, l->nat);
	}
	/* Set Frame packetization */
	if (sub->rtp)
		ast_rtp_codec_setpref(sub->rtp, &l->prefs);

	/* Create the RTP connection */
	transmit_connect(d->session, sub);
 	ast_mutex_unlock(&sub->lock);
}

static void *skinny_newcall(void *data)
{
	struct ast_channel *c = data;
	struct skinny_subchannel *sub = c->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	int res = 0;

	ast_copy_string(l->lastnumberdialed, c->exten, sizeof(l->lastnumberdialed));
	ast_set_callerid(c,
		l->hidecallerid ? "" : l->cid_num,
		l->hidecallerid ? "" : l->cid_name,
		c->cid.cid_ani ? NULL : l->cid_num);
	ast_setstate(c, AST_STATE_RING);
	if (!sub->rtp) {
		start_rtp(sub);
	}
	res = ast_pbx_run(c);
	if (res) {
		ast_log(LOG_WARNING, "PBX exited non-zero\n");
		transmit_tone(s, SKINNY_REORDER, l->instance, sub->callid);
	}
	return NULL;
}

static void *skinny_ss(void *data)
{
	struct ast_channel *c = data;
	struct skinny_subchannel *sub = c->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	int len = 0;
	int timeout = firstdigittimeout;
	int res = 0;
	int getforward=0;
	int loop_pause = 100;

	if (option_verbose > 2)
		ast_verbose( VERBOSE_PREFIX_3 "Starting simple switch on '%s@%s'\n", l->name, d->name);
	len = strlen(d->exten);

	while (len < AST_MAX_EXTENSION-1) {

		res = 1;  /* Assume we will get a digit */
		while (strlen(d->exten) == len) {
			ast_safe_sleep(c, loop_pause);
			timeout -= loop_pause;
			if (timeout <= 0){
				res = 0;
				break;
			}
		}

		len = strlen(d->exten);

		if (!ast_ignore_pattern(c->context, d->exten)) {
			transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
		}

		if (ast_exists_extension(c, c->context, d->exten, 1, l->cid_num)) {
			if (!res || !ast_matchmore_extension(c, c->context, d->exten, 1, l->cid_num)) {
				if (getforward) {
					/* Record this as the forwarding extension */
					ast_copy_string(l->call_forward, d->exten, sizeof(l->call_forward));
					if (option_verbose > 2)
						ast_verbose(VERBOSE_PREFIX_3 "Setting call forward to '%s' on channel %s\n",
							l->call_forward, c->name);
					transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
					if (res) {
						break;
					}
					ast_safe_sleep(c, 500);
					ast_indicate(c, -1);
 					ast_safe_sleep(c, 1000);
					memset(d->exten, 0, sizeof(d->exten));
					transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
					len = 0;
					getforward = 0;
				} else {
					ast_copy_string(c->exten, d->exten, sizeof(c->exten));
					ast_copy_string(l->lastnumberdialed, d->exten, sizeof(l->lastnumberdialed));
					memset (d->exten, 0, sizeof(d->exten));
					skinny_newcall(c);
					return NULL;
				}
			} else {
				/* It's a match, but they just typed a digit, and there is an ambiguous match,
				   so just set the timeout to matchdigittimeout and wait some more */
				timeout = matchdigittimeout;
			}
		} else if (res == 0) {
			ast_log(LOG_DEBUG, "Not enough digits (and no ambiguous match)...\n");
			memset(d->exten, 0, sizeof(d->exten));
			transmit_tone(s, SKINNY_REORDER, l->instance, sub->callid);
			if (sub->owner && sub->owner->_state != AST_STATE_UP) {
				ast_indicate(c, -1);
				ast_hangup(c);
			}
			return NULL;
		} else if (!ast_canmatch_extension(c, c->context, d->exten, 1, c->cid.cid_num) &&
			   ((d->exten[0] != '*') || (!ast_strlen_zero(d->exten) > 2))) {
			ast_log(LOG_WARNING, "Can't match [%s] from '%s' in context %s\n", d->exten, c->cid.cid_num ? c->cid.cid_num : "<Unknown Caller>", c->context);
			memset(d->exten, 0, sizeof(d->exten));
			transmit_tone(s, SKINNY_REORDER, l->instance, sub->callid);
			/* hang out for 3 seconds to let congestion play */
			ast_safe_sleep(c, 3000);
			break;
		}
		if (!timeout) {
			timeout = gendigittimeout;
		}
		if (len && !ast_ignore_pattern(c->context, d->exten)) {
			ast_indicate(c, -1);
		}
	}
	if (c)
		ast_hangup(c);

	memset(d->exten, 0, sizeof(d->exten));
	return NULL;
}



static int skinny_call(struct ast_channel *ast, char *dest, int timeout)
{
	int res = 0;
	int tone = 0;
	struct skinny_subchannel *sub = ast->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;

	if (!d->registered) {
		ast_log(LOG_ERROR, "Device not registered, cannot call %s\n", dest);
		return -1;
	}

	if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
		ast_log(LOG_WARNING, "skinny_call called on %s, neither down nor reserved\n", ast->name);
		return -1;
	}

	if (skinnydebug)
		ast_verbose(VERBOSE_PREFIX_3 "skinny_call(%s)\n", ast->name);

	if (l->dnd) {
		ast_queue_control(ast, AST_CONTROL_BUSY);
		return -1;
	}

	switch (l->hookstate) {
	case SKINNY_OFFHOOK:
		tone = SKINNY_CALLWAITTONE;
		break;
	case SKINNY_ONHOOK:
		tone = SKINNY_ALERT;
		break;
	default:
		ast_log(LOG_ERROR, "Don't know how to deal with hookstate %d\n", l->hookstate);
		break;
	}

	transmit_callstate(s, l->instance, SKINNY_RINGIN, sub->callid);
	transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_RINGIN);
	transmit_displaypromptstatus(s, "Ring-In", 0, l->instance, sub->callid);
	transmit_callinfo(s, ast->cid.cid_name, ast->cid.cid_num, l->cid_name, l->cid_num, l->instance, sub->callid, 1);
	transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_BLINK);
	transmit_ringer_mode(s, SKINNY_RING_INSIDE);

	ast_setstate(ast, AST_STATE_RINGING);
	ast_queue_control(ast, AST_CONTROL_RINGING);
	sub->outgoing = 1;
	return res;
}

static int skinny_hangup(struct ast_channel *ast)
{
	struct skinny_subchannel *sub = ast->tech_pvt;
	struct skinny_line *l;
	struct skinny_device *d;
	struct skinnysession *s;

	if (!sub) {
		ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
		return 0;
	}
	l = sub->parent;
	d = l->parent;
	s = d->session;
	if (skinnydebug)
		ast_verbose("skinny_hangup(%s) on %s@%s\n", ast->name, l->name, d->name);

	if (d->registered) {
		if ((l->type = TYPE_LINE) && (l->hookstate == SKINNY_OFFHOOK)) {
			l->hookstate = SKINNY_ONHOOK;
			transmit_callstate(s, l->instance, SKINNY_ONHOOK, sub->callid);
			transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_OFF);
			transmit_speaker_mode(s, SKINNY_SPEAKEROFF);
		} else if ((l->type = TYPE_LINE) && (l->hookstate == SKINNY_ONHOOK)) {
			transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			transmit_callstate(s, l->instance, SKINNY_ONHOOK, sub->callid);
			transmit_ringer_mode(s, SKINNY_RING_OFF);
			transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_OFF);
			do_housekeeping(s);
		}
	}
	ast_mutex_lock(&sub->lock);
	sub->owner = NULL;
	ast->tech_pvt = NULL;
	sub->alreadygone = 0;
	sub->outgoing = 0;
	if (sub->rtp) {
		ast_rtp_destroy(sub->rtp);
		sub->rtp = NULL;
	}
	ast_mutex_unlock(&sub->lock);
	return 0;
}

static int skinny_answer(struct ast_channel *ast)
{
	int res = 0;
	struct skinny_subchannel *sub = ast->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	char exten[AST_MAX_EXTENSION] = "";

	ast_copy_string(exten, S_OR(ast->macroexten, ast->exten), sizeof(exten));

	sub->cxmode = SKINNY_CX_SENDRECV;
	if (!sub->rtp) {
		start_rtp(sub);
	}
	if (skinnydebug)
		ast_verbose("skinny_answer(%s) on %s@%s-%d\n", ast->name, l->name, d->name, sub->callid);
	if (ast->_state != AST_STATE_UP) {
		ast_setstate(ast, AST_STATE_UP);
	}

	transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
	/* order matters here...
	   for some reason, transmit_callinfo must be before transmit_callstate,
	   or you won't get keypad messages in some situations. */
	transmit_callinfo(s, ast->cid.cid_name, ast->cid.cid_num, exten, exten, l->instance, sub->callid, 2);
	transmit_callstate(s, l->instance, SKINNY_CONNECTED, sub->callid);
	transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_CONNECTED);
	transmit_dialednumber(s, exten, l->instance, sub->callid);
	transmit_displaypromptstatus(s, "Connected", 0, l->instance, sub->callid);
	return res;
}

/* Retrieve audio/etc from channel.  Assumes sub->lock is already held. */
static struct ast_frame *skinny_rtp_read(struct skinny_subchannel *sub)
{
	struct ast_channel *ast = sub->owner;
	struct ast_frame *f;

	if (!sub->rtp) {
		/* We have no RTP allocated for this channel */
		return &ast_null_frame;
	}

	switch(ast->fdno) {
	case 0:
		f = ast_rtp_read(sub->rtp);	/* RTP Audio */
		break;
	case 1:
		f = ast_rtcp_read(sub->rtp);	/* RTCP Control Channel */
		break;
	case 2:
		f = ast_rtp_read(sub->vrtp);	/* RTP Video */
		break;
	case 3:
		f = ast_rtcp_read(sub->vrtp);	/* RTCP Control Channel for video */
		break;
#if 0
	case 5:
		/* Not yet supported */
		f = ast_udptl_read(sub->udptl);	/* UDPTL for T.38 */
		break;
#endif
	default:
		f = &ast_null_frame;
	}

	if (ast) {
		/* We already hold the channel lock */
		if (f->frametype == AST_FRAME_VOICE) {
			if (f->subclass != ast->nativeformats) {
				ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
				ast->nativeformats = f->subclass;
				ast_set_read_format(ast, ast->readformat);
				ast_set_write_format(ast, ast->writeformat);
			}
		}
	}
	return f;
}

static struct ast_frame *skinny_read(struct ast_channel *ast)
{
	struct ast_frame *fr;
	struct skinny_subchannel *sub = ast->tech_pvt;
	ast_mutex_lock(&sub->lock);
	fr = skinny_rtp_read(sub);
	ast_mutex_unlock(&sub->lock);
	return fr;
}

static int skinny_write(struct ast_channel *ast, struct ast_frame *frame)
{
	struct skinny_subchannel *sub = ast->tech_pvt;
	int res = 0;
	if (frame->frametype != AST_FRAME_VOICE) {
		if (frame->frametype == AST_FRAME_IMAGE) {
			return 0;
		} else {
			ast_log(LOG_WARNING, "Can't send %d type frames with skinny_write\n", frame->frametype);
			return 0;
		}
	} else {
		if (!(frame->subclass & ast->nativeformats)) {
			ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
				frame->subclass, ast->nativeformats, ast->readformat, ast->writeformat);
			return -1;
		}
	}
	if (sub) {
		ast_mutex_lock(&sub->lock);
		if (sub->rtp) {
			res = ast_rtp_write(sub->rtp, frame);
		}
		ast_mutex_unlock(&sub->lock);
	}
	return res;
}

static int skinny_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
	struct skinny_subchannel *sub = newchan->tech_pvt;
	ast_log(LOG_NOTICE, "skinny_fixup(%s, %s)\n", oldchan->name, newchan->name);
	if (sub->owner != oldchan) {
		ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner);
		return -1;
	}
	sub->owner = newchan;
	return 0;
}

static int skinny_senddigit_begin(struct ast_channel *ast, char digit)
{
	return -1; /* Start inband indications */
}

static int skinny_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
{
#if 0
	struct skinny_subchannel *sub = ast->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	int tmp;
	/* not right */
	sprintf(tmp, "%d", digit);
	transmit_tone(d->session, digit, l->instance, sub->callid);
#endif
	return -1; /* Stop inband indications */
}

static char *control2str(int ind) {
	char *tmp;

	switch (ind) {
	case AST_CONTROL_HANGUP:
		return "Other end has hungup";
	case AST_CONTROL_RING:
		return "Local ring";
	case AST_CONTROL_RINGING:
		return "Remote end is ringing";
	case AST_CONTROL_ANSWER:
		return "Remote end has answered";
	case AST_CONTROL_BUSY:
		return "Remote end is busy";
	case AST_CONTROL_TAKEOFFHOOK:
		return "Make it go off hook";
	case AST_CONTROL_OFFHOOK:
		return "Line is off hook";
	case AST_CONTROL_CONGESTION:
		return "Congestion (circuits busy)";
	case AST_CONTROL_FLASH:
		return "Flash hook";
	case AST_CONTROL_WINK:
		return "Wink";
	case AST_CONTROL_OPTION:
		return "Set a low-level option";
	case AST_CONTROL_RADIO_KEY:
		return "Key Radio";
	case AST_CONTROL_RADIO_UNKEY:
		return "Un-Key Radio";
	case AST_CONTROL_PROGRESS:
		return "Remote end is making Progress";
	case AST_CONTROL_PROCEEDING:
		return "Remote end is proceeding";
	case AST_CONTROL_HOLD:
		return "Hold";
	case AST_CONTROL_UNHOLD:
		return "Unhold";
	case -1:
		return "Stop tone";
	default:
		if (!(tmp = ast_threadstorage_get(&control2str_threadbuf, CONTROL2STR_BUFSIZE)))
                        return "Unknown";
		snprintf(tmp, CONTROL2STR_BUFSIZE, "UNKNOWN-%d", ind);
		return tmp;
	}
}


static int skinny_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen)
{
	struct skinny_subchannel *sub = ast->tech_pvt;
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	char exten[AST_MAX_EXTENSION] = "";

	if (!s) {
		ast_log(LOG_NOTICE, "Asked to indicate '%s' condition on channel %s, but session does not exist.\n", control2str(ind), ast->name);
		return -1;
	}

	ast_copy_string(exten, S_OR(ast->macroexten, ast->exten), sizeof(exten));

	if (skinnydebug)
		ast_verbose(VERBOSE_PREFIX_3 "Asked to indicate '%s' condition on channel %s\n", control2str(ind), ast->name);
	switch(ind) {
	case AST_CONTROL_RINGING:
		if (ast->_state != AST_STATE_UP) {
			if (!sub->progress) {
				if (!d->earlyrtp) {
					transmit_tone(s, SKINNY_ALERT, l->instance, sub->callid);
				}
				transmit_callstate(s, l->instance, SKINNY_RINGOUT, sub->callid);
				transmit_dialednumber(s, exten, l->instance, sub->callid);
				transmit_displaypromptstatus(s, "Ring Out", 0, l->instance, sub->callid);
				transmit_callinfo(s, ast->cid.cid_name, ast->cid.cid_num, exten, exten, l->instance, sub->callid, 2); /* 2 = outgoing from phone */
				sub->ringing = 1;
				if (!d->earlyrtp) {
					break;
				}
			}
		}
		return -1; /* Tell asterisk to provide inband signalling */
	case AST_CONTROL_BUSY:
		if (ast->_state != AST_STATE_UP) {
			if (!d->earlyrtp) {
				transmit_tone(s, SKINNY_BUSYTONE, l->instance, sub->callid);
			}
			transmit_callstate(s, l->instance, SKINNY_BUSY, sub->callid);
			sub->alreadygone = 1;
			ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
			if (!d->earlyrtp) {
				break;
			}
		}
		return -1; /* Tell asterisk to provide inband signalling */
	case AST_CONTROL_CONGESTION:
		if (ast->_state != AST_STATE_UP) {
			if (!d->earlyrtp) {
				transmit_tone(s, SKINNY_REORDER, l->instance, sub->callid);
			}
			transmit_callstate(s, l->instance, SKINNY_CONGESTION, sub->callid);
			sub->alreadygone = 1;
			ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
			if (!d->earlyrtp) {
				break;
			}
		}
		return -1; /* Tell asterisk to provide inband signalling */
	case AST_CONTROL_PROGRESS:
		if ((ast->_state != AST_STATE_UP) && !sub->progress && !sub->outgoing) {
			if (!d->earlyrtp) {
				transmit_tone(s, SKINNY_ALERT, l->instance, sub->callid);
			}
			transmit_callstate(s, l->instance, SKINNY_PROGRESS, sub->callid);
			transmit_displaypromptstatus(s, "Call Progress", 0, l->instance, sub->callid);
			transmit_callinfo(s, ast->cid.cid_name, ast->cid.cid_num, exten, exten, l->instance, sub->callid, 2); /* 2 = outgoing from phone */
			sub->progress = 1;
			if (!d->earlyrtp) {
				break;
			}
		}
		return -1; /* Tell asterisk to provide inband signalling */
	case -1:  /* STOP_TONE */
		transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
		break;
	case AST_CONTROL_HOLD:
		ast_moh_start(ast, data, l->mohinterpret);
		break;
	case AST_CONTROL_UNHOLD:
		ast_moh_stop(ast);
		break;
	case AST_CONTROL_PROCEEDING:
		break;
	case AST_CONTROL_SRCUPDATE:
		ast_rtp_new_source(sub->rtp);
		break;
	default:
		ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
		return -1; /* Tell asterisk to provide inband signalling */
	}
	return 0;
}

static struct ast_channel *skinny_new(struct skinny_line *l, int state)
{
	struct ast_channel *tmp;
	struct skinny_subchannel *sub;
	struct skinny_device *d = l->parent;
	int fmt;

	tmp = ast_channel_alloc(1, state, l->cid_num, l->cid_name, l->accountcode, l->exten, l->context, l->amaflags, "Skinny/%s@%s-%d", l->name, d->name, callnums);
	if (!tmp) {
		ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
		return NULL;
	} else {
		sub = ast_calloc(1, sizeof(struct skinny_subchannel));
		if (!sub) {
			ast_log(LOG_WARNING, "Unable to allocate Skinny subchannel\n");
			return NULL;
		} else {
			ast_mutex_init(&sub->lock);

			sub->owner = tmp;
			sub->callid = callnums++;
			d->lastlineinstance = l->instance;
			d->lastcallreference = sub->callid;
			sub->cxmode = SKINNY_CX_INACTIVE;
			sub->nat = l->nat;
			sub->parent = l;
			sub->onhold = 0;

			sub->next = l->sub;
			l->sub = sub;
		}
		tmp->tech = &skinny_tech;
		tmp->tech_pvt = sub;
		tmp->nativeformats = l->capability;
		if (!tmp->nativeformats)
			tmp->nativeformats = default_capability;
		fmt = ast_best_codec(tmp->nativeformats);
		if (skinnydebug)
			ast_verbose("skinny_new: tmp->nativeformats=%d fmt=%d\n", tmp->nativeformats, fmt);
		if (sub->rtp) {
			tmp->fds[0] = ast_rtp_fd(sub->rtp);
		}
		if (state == AST_STATE_RING) {
			tmp->rings = 1;
		}
		tmp->writeformat = fmt;
		tmp->rawwriteformat = fmt;
		tmp->readformat = fmt;
		tmp->rawreadformat = fmt;
		if (!ast_strlen_zero(l->language))
			ast_string_field_set(tmp, language, l->language);
		if (!ast_strlen_zero(l->accountcode))
			ast_string_field_set(tmp, accountcode, l->accountcode);
		if (l->amaflags)
			tmp->amaflags = l->amaflags;

		ast_module_ref(ast_module_info->self);
		tmp->callgroup = l->callgroup;
		tmp->pickupgroup = l->pickupgroup;
		ast_string_field_set(tmp, call_forward, l->call_forward);
		ast_copy_string(tmp->context, l->context, sizeof(tmp->context));
		ast_copy_string(tmp->exten, l->exten, sizeof(tmp->exten));

		/* Don't use ast_set_callerid() here because it will
		 * generate a needless NewCallerID event */
		tmp->cid.cid_ani = ast_strdup(l->cid_num);

		tmp->priority = 1;
		tmp->adsicpe = AST_ADSI_UNAVAILABLE;

		if (sub->rtp)
			ast_jb_configure(tmp, &global_jbconf);

		if (state != AST_STATE_DOWN) {
			if (ast_pbx_start(tmp)) {
				ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
				ast_hangup(tmp);
				tmp = NULL;
			}
		}
	}
	return tmp;
}

static int skinny_hold(struct skinny_subchannel *sub)
{
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	struct skinny_req *req;

	/* Don't try to hold a channel that doesn't exist */
	if (!sub || !sub->owner)
		return 0;

	/* Channel needs to be put on hold */
	if (skinnydebug)
		ast_verbose("Putting on Hold(%d)\n", l->instance);

	ast_queue_control_data(sub->owner, AST_CONTROL_HOLD,
		S_OR(l->mohsuggest, NULL),
		!ast_strlen_zero(l->mohsuggest) ? strlen(l->mohsuggest) + 1 : 0);

	if (!(req = req_alloc(sizeof(struct activate_call_plane_message), ACTIVATE_CALL_PLANE_MESSAGE)))
		return 0;

	req->data.activatecallplane.lineInstance = htolel(l->instance);
	transmit_response(s, req);

	if (!(req = req_alloc(sizeof(struct close_receive_channel_message), CLOSE_RECEIVE_CHANNEL_MESSAGE)))
		return 0;

	req->data.closereceivechannel.conferenceId = htolel(sub->callid);
	req->data.closereceivechannel.partyId = htolel(sub->callid);
	transmit_response(s, req);

	if (!(req = req_alloc(sizeof(struct stop_media_transmission_message), STOP_MEDIA_TRANSMISSION_MESSAGE)))
		return 0;

	req->data.stopmedia.conferenceId = htolel(sub->callid);
	req->data.stopmedia.passThruPartyId = htolel(sub->callid);
	transmit_response(s, req);

	transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_BLINK);
	sub->onhold = 1;
	return 1;
}

static int skinny_unhold(struct skinny_subchannel *sub)
{
	struct skinny_line *l = sub->parent;
	struct skinny_device *d = l->parent;
	struct skinnysession *s = d->session;
	struct skinny_req *req;

	/* Don't try to unhold a channel that doesn't exist */
	if (!sub || !sub->owner)
		return 0;

	/* Channel is on hold, so we will unhold */
	if (skinnydebug)
		ast_verbose("Taking off Hold(%d)\n", l->instance);

	ast_queue_control(sub->owner, AST_CONTROL_UNHOLD);

	if (!(req = req_alloc(sizeof(struct activate_call_plane_message), ACTIVATE_CALL_PLANE_MESSAGE)))
		return 0;

	req->data.activatecallplane.lineInstance = htolel(l->instance);
	transmit_response(s, req);

	transmit_connect(s, sub);
	transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);
	sub->onhold = 0;
	return 1;
}

static int handle_keep_alive_message(struct skinny_req *req, struct skinnysession *s)
{
	if (!(req = req_alloc(0, KEEP_ALIVE_ACK_MESSAGE)))
		return -1;

	transmit_response(s, req);
	do_housekeeping(s);
	return 1;
}

static int handle_register_message(struct skinny_req *req, struct skinnysession *s)
{
	char name[16];
	int res;

	memcpy(&name, req->data.reg.name, sizeof(name));

	res = skinny_register(req, s);
	if (!res) {
		ast_log(LOG_ERROR, "Rejecting Device %s: Device not found\n", name);
		if (!(req = req_alloc(sizeof(struct register_rej_message), REGISTER_REJ_MESSAGE)))
			return -1;

		snprintf(req->data.regrej.errMsg, sizeof(req->data.regrej.errMsg), "No Authority: %s", name);
		transmit_response(s, req);
		return 0;
	}
	if (option_verbose > 2)
		ast_verbose(VERBOSE_PREFIX_3 "Device '%s' successfully registered\n", name);

	if (!(req = req_alloc(sizeof(struct register_ack_message), REGISTER_ACK_MESSAGE)))
		return -1;

	req->data.regack.res[0] = '0';
	req->data.regack.res[1] = '\0';
	req->data.regack.keepAlive = htolel(keep_alive);
	memcpy(req->data.regack.dateTemplate, date_format, sizeof(req->data.regack.dateTemplate));
	req->data.regack.res2[0] = '0';
	req->data.regack.res2[1] = '\0';
	req->data.regack.secondaryKeepAlive = htolel(keep_alive);
	transmit_response(s, req);
	if (skinnydebug)
		ast_verbose("Requesting capabilities\n");

	if (!(req = req_alloc(0, CAPABILITIES_REQ_MESSAGE)))
		return -1;

	transmit_response(s, req);

	return res;
}

static int handle_ip_port_message(struct skinny_req *req, struct skinnysession *s)
{
	/* no response necessary */
	return 1;
}

static int handle_keypad_button_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_subchannel *sub = NULL;
	struct skinny_line *l;
	struct skinny_device *d = s->device;
	struct ast_frame f = { 0, };
	char dgt;
	int digit;
	int lineInstance;
	int callReference;

	digit = letohl(req->data.keypad.button);
	lineInstance = letohl(req->data.keypad.lineInstance);
	callReference = letohl(req->data.keypad.callReference);

	if (digit == 14) {
		dgt = '*';
	} else if (digit == 15) {
		dgt = '#';
	} else if (digit >= 0 && digit <= 9) {
		dgt = '0' + digit;
	} else {
		/* digit=10-13 (A,B,C,D ?), or
		 * digit is bad value
		 *
		 * probably should not end up here, but set
		 * value for backward compatibility, and log
		 * a warning.
		 */
		dgt = '0' + digit;
		ast_log(LOG_WARNING, "Unsupported digit %d\n", digit);
	}

	f.subclass = dgt;

	f.src = "skinny";

	if (lineInstance && callReference)
		sub = find_subchannel_by_instance_reference(d, lineInstance, callReference);
	else
		sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

	if (!sub)
		return 0;

	l = sub->parent;
	if (sub->owner) {
		if (sub->owner->_state == 0) {
			f.frametype = AST_FRAME_DTMF_BEGIN;
			ast_queue_frame(sub->owner, &f);
		}
		/* XXX MUST queue this frame to all lines in threeway call if threeway call is active */
		f.frametype = AST_FRAME_DTMF_END;
		ast_queue_frame(sub->owner, &f);
		/* XXX This seriously needs to be fixed */
		if (sub->next && sub->next->owner) {
			if (sub->owner->_state == 0) {
				f.frametype = AST_FRAME_DTMF_BEGIN;
				ast_queue_frame(sub->next->owner, &f);
			}
			f.frametype = AST_FRAME_DTMF_END;
			ast_queue_frame(sub->next->owner, &f);
		}
	} else {
		if (skinnydebug)
			ast_verbose("No owner: %s\n", l->name);
	}
	return 1;
}

static int handle_stimulus_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub;
	/*struct skinny_speeddial *sd;*/
	struct ast_channel *c;
	pthread_t t;
	int event;
	int instance;
	int callreference;
	/*int res = 0;*/

	event = letohl(req->data.stimulus.stimulus);
	instance = letohl(req->data.stimulus.stimulusInstance);
	callreference = letohl(req->data.stimulus.callreference); 
	if (skinnydebug)
		ast_verbose("callreference in handle_stimulus_message is '%d'\n", callreference);

	/*  Note that this call should be using the passed in instance and callreference */
	sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

	if (!sub) {
		l = find_line_by_instance(d, d->lastlineinstance);
		if (!l) {
			return 0;
		}
	} else {
		l = sub->parent;
	}

	switch(event) {
	case STIMULUS_REDIAL:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Redial(%d/%d)\n", instance, callreference);

#if 0
 		if (ast_strlen_zero(l->lastnumberdialed)) {
 			ast_log(LOG_WARNING, "Attempted redial, but no previously dialed number found.\n");
 			l->hookstate = SKINNY_ONHOOK;
 			transmit_speaker_mode(s, SKINNY_SPEAKEROFF);
 			transmit_callstate(s, l->instance, SKINNY_ONHOOK, instance);
 			break;
 		}

		c = skinny_new(l, AST_STATE_DOWN);
		if(!c) {
			ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
		} else {
			sub = c->tech_pvt;
			transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			if (skinnydebug)
				ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
			transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
			transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_RINGOUT);

			if (!ast_ignore_pattern(c->context, l->lastnumberdialed)) {
				transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			}
			ast_copy_string(c->exten, l->lastnumberdialed, sizeof(c->exten));
			if (ast_pthread_create(&t, NULL, skinny_newcall, c)) {
				ast_log(LOG_WARNING, "Unable to create new call thread: %s\n", strerror(errno));
				ast_hangup(c);
			}
		}
#endif
		break;
	case STIMULUS_SPEEDDIAL:
		if (skinnydebug)
			ast_verbose("Received Stimulus: SpeedDial(%d/%d)\n", instance, callreference);

#if 0
		if (!(sd = find_speeddial_by_instance(d, instance))) {
			return 0;
		}

		if (ast_strlen_zero(l->lastnumberdialed)) {
			ast_log(LOG_WARNING, "Attempted redial, but no previously dialed number found.\n");
			l->hookstate = SKINNY_ONHOOK;
			transmit_speaker_mode(s, SKINNY_SPEAKEROFF);
			transmit_callstate(s, l->instance, SKINNY_ONHOOK, instance);
			break;
		}

		c = skinny_new(l, AST_STATE_DOWN);
		if(c) {
			sub = c->tech_pvt;
			l = sub->parent;
			transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			if (skinnydebug)
				ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
			transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
			transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_RINGOUT);

			if (!ast_ignore_pattern(c->context, sd->exten)) {
				transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			}
			if (ast_exists_extension(c, c->context, sd->exten, 1, l->cid_num)) {
				if (!ast_matchmore_extension(c, c->context, sd->exten, 1, l->cid_num)) {
					ast_copy_string(c->exten, sd->exten, sizeof(c->exten));
					ast_copy_string(l->lastnumberdialed, sd->exten, sizeof(l->lastnumberdialed));
					skinny_newcall(c);
					break;
				}
			}
		} else {
			ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
		}
#endif
		break;
	case STIMULUS_HOLD:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Hold(%d/%d)\n", instance, callreference);

		if (!sub)
			break;

		if (sub->onhold) {
			skinny_unhold(sub);
		} else {
			skinny_hold(sub);
		}
		break;
	case STIMULUS_TRANSFER:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Transfer(%d/%d)\n", instance, callreference);
		/* XXX figure out how to transfer */
		break;
	case STIMULUS_CONFERENCE:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Conference(%d/%d)\n", instance, callreference);
		/* XXX determine the best way to pull off a conference.  Meetme? */
		break;
	case STIMULUS_VOICEMAIL:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Voicemail(%d/%d)\n", instance, callreference);
		/* XXX Find and dial voicemail extension */
		break;
	case STIMULUS_CALLPARK:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Park Call(%d/%d)\n", instance, callreference);
		/* XXX Park the call */
		break;
	case STIMULUS_FORWARDALL:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Forward All(%d/%d)\n", instance, callreference);
		/* Why is DND under FORWARDALL? */
		/* Because it's the same thing. */

		/* Do not disturb */
		if (l->dnd != 0){
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Disabling DND on %s@%s\n", l->name, d->name);
			l->dnd = 0;
			transmit_lamp_indication(s, STIMULUS_FORWARDALL, 1, SKINNY_LAMP_ON);
			transmit_displaynotify(s, "DnD disabled", 10);
		} else {
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Enabling DND on %s@%s\n", l->name, d->name);
			l->dnd = 1;
			transmit_lamp_indication(s, STIMULUS_FORWARDALL, 1, SKINNY_LAMP_OFF);
			transmit_displaynotify(s, "DnD enabled", 10);
		}
		break;
	case STIMULUS_FORWARDBUSY:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Forward Busy (%d/%d)\n", instance, callreference);
		break;
	case STIMULUS_FORWARDNOANSWER:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Forward No Answer (%d/%d)\n", instance, callreference);
		break;
	case STIMULUS_DISPLAY:
		/* Not sure what this is */
		if (skinnydebug)
			ast_verbose("Received Stimulus: Display(%d/%d)\n", instance, callreference);
		break;
	case STIMULUS_LINE:
		if (skinnydebug)
			ast_verbose("Received Stimulus: Line(%d/%d)\n", instance, callreference);

		l = find_line_by_instance(s->device, instance);

		if (!l) {
			return 0;
		}

		/* turn the speaker on */
		transmit_speaker_mode(s, SKINNY_SPEAKERON);
		transmit_ringer_mode(s, SKINNY_RING_OFF);
		transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);

		l->hookstate = SKINNY_OFFHOOK;

		if (sub && sub->outgoing) {
			/* We're answering a ringing call */
			ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
			transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			transmit_callstate(s, l->instance, SKINNY_CONNECTED, sub->callid);
			transmit_displaypromptstatus(s, "Connected", 0, l->instance, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_CONNECTED);
			start_rtp(sub);
			ast_setstate(sub->owner, AST_STATE_UP);
		} else {
			if (sub && sub->owner) {
				ast_log(LOG_DEBUG, "Current subchannel [%s] already has owner\n", sub->owner->name);
			} else {
				c = skinny_new(l, AST_STATE_DOWN);
				if(c) {
					sub = c->tech_pvt;
					transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
					if (skinnydebug)
						ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
					transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
					transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
					transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_OFFHOOK);

					/* start the switch thread */
					if (ast_pthread_create(&t, NULL, skinny_ss, c)) {
						ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
						ast_hangup(c);
					}
				} else {
					ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
				}
			}
		}
		break;
	default:
		if (skinnydebug)
			ast_verbose("RECEIVED UNKNOWN STIMULUS:  %d(%d/%d)\n", event, instance, callreference);
		break;
	}
	return 1;
}

static int handle_offhook_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub;
	struct ast_channel *c;
	pthread_t t;
	int unknown1;
	int unknown2;

	unknown1 = letohl(req->data.offhook.unknown1);
	unknown2 = letohl(req->data.offhook.unknown2);

	sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

	if (!sub) {
		l = find_line_by_instance(d, d->lastlineinstance);
		if (!l) {
			return 0;
		}
	} else {
		l = sub->parent;
	}

	transmit_ringer_mode(s, SKINNY_RING_OFF);
	l->hookstate = SKINNY_OFFHOOK;

	if (sub && sub->onhold) {
		return 1;
	}

	transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);

	if (sub && sub->outgoing) {
		/* We're answering a ringing call */
		ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
		transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
		transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
		transmit_callstate(s, l->instance, SKINNY_CONNECTED, sub->callid);
		transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_CONNECTED);
		start_rtp(sub);
		ast_setstate(sub->owner, AST_STATE_UP);
	} else {
		if (sub && sub->owner) {
			ast_log(LOG_DEBUG, "Current sub [%s] already has owner\n", sub->owner->name);
		} else {
			c = skinny_new(l, AST_STATE_DOWN);
			if(c) {
				sub = c->tech_pvt;
				transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
				if (skinnydebug)
					ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
				transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
				transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
				transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_OFFHOOK);

				/* start the switch thread */
				if (ast_pthread_create(&t, NULL, skinny_ss, c)) {
					ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
					ast_hangup(c);
				}
			} else {
				ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
			}
		}
	}
	return 1;
}

static int handle_onhook_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub;
	int unknown1;
	int unknown2;

	unknown1 = letohl(req->data.onhook.unknown1);
	unknown2 = letohl(req->data.onhook.unknown2);

	sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

	if (!sub) {
		return 0;
	}
	l = sub->parent;

	if (l->hookstate == SKINNY_ONHOOK) {
		/* Something else already put us back on hook */
		return 0;
	}
	l->hookstate = SKINNY_ONHOOK;

	if (sub->onhold) {
		return 0;
	}

	sub->cxmode = SKINNY_CX_RECVONLY;
	transmit_callstate(s, l->instance, l->hookstate, sub->callid);
	if (skinnydebug)
		ast_verbose("Skinny %s@%s went on hook\n", l->name, d->name);
	if (l->transfer && (sub->owner && sub->next && sub->next->owner) && ((!sub->outgoing) || (sub->next && !sub->next->outgoing))) {
		/* We're allowed to transfer, we have two active calls and
		   we made at least one of the calls.  Let's try and transfer */

#if 0
		if ((res = attempt_transfer(p)) < 0) {
			if (sub->next && sub->next->owner) {
				sub->next->alreadygone = 1;
				ast_queue_hangup(sub->next->owner,1);
			}
		} else if (res) {
			ast_log(LOG_WARNING, "Transfer attempt failed\n");
			return 0;
		}
#endif
	} else {
		/* Hangup the current call */
		/* If there is another active call, skinny_hangup will ring the phone with the other call */
		if (sub->owner) {
			sub->alreadygone = 1;
			ast_queue_hangup(sub->owner);
		} else {
			ast_log(LOG_WARNING, "Skinny(%s@%s-%d) channel already destroyed\n",
				l->name, d->name, sub->callid);
		}
	}
	if ((l->hookstate == SKINNY_ONHOOK) && (sub->next && !sub->next->rtp)) {
		do_housekeeping(s);
	}
	return 1;
}

static int handle_capabilities_res_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	uint32_t count = 0;
	int codecs = 0;
	int i;

	count = letohl(req->data.caps.count);
	if (count > SKINNY_MAX_CAPABILITIES) {
		count = SKINNY_MAX_CAPABILITIES;
		ast_log(LOG_WARNING, "Received more capabilities than we can handle (%d).  Ignoring the rest.\n", SKINNY_MAX_CAPABILITIES);
	}

	for (i = 0; i < count; i++) {
		int acodec = 0;
		int scodec = 0;
		scodec = letohl(req->data.caps.caps[i].codec);
		acodec = codec_skinny2ast(scodec);
		if (skinnydebug)
			ast_verbose("Adding codec capability '%d (%d)'\n", acodec, scodec);
		codecs |= acodec;
	}

	d->capability &= codecs;
	ast_verbose("Device capability set to '%d'\n", d->capability);
	for (l = d->lines; l; l = l->next) {
		ast_mutex_lock(&l->lock);
		l->capability = d->capability;
		ast_mutex_unlock(&l->lock);
	}

	return 1;
}

static int handle_speed_dial_stat_req_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_speeddial *sd;
	int instance;

	instance = letohl(req->data.speeddialreq.speedDialNumber);

	sd = find_speeddial_by_instance(d, instance);

	if (!sd) {
		return 0;
	}

	if (!(req = req_alloc(sizeof(struct speed_dial_stat_res_message), SPEED_DIAL_STAT_RES_MESSAGE)))
		return -1;

	req->data.speeddialreq.speedDialNumber = htolel(instance);
	ast_copy_string(req->data.speeddial.speedDialDirNumber, sd->exten, sizeof(req->data.speeddial.speedDialDirNumber));
	ast_copy_string(req->data.speeddial.speedDialDisplayName, sd->label, sizeof(req->data.speeddial.speedDialDisplayName));

	transmit_response(s, req);
	return 1;
}

static int handle_line_state_req_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	int instance;

	instance = letohl(req->data.line.lineNumber);

	ast_mutex_lock(&devicelock);

	l = find_line_by_instance(d, instance);

	if (!l) {
		return 0;
	}

	ast_mutex_unlock(&devicelock);

	if (!(req = req_alloc(sizeof(struct line_stat_res_message), LINE_STAT_RES_MESSAGE)))
		return -1;

	req->data.linestat.lineNumber = letohl(instance);
	memcpy(req->data.linestat.lineDirNumber, l->name,
			sizeof(req->data.linestat.lineDirNumber));
	memcpy(req->data.linestat.lineDisplayName, l->label,
			sizeof(req->data.linestat.lineDisplayName));
	transmit_response(s,req);
	return 1;
}

static int handle_time_date_req_message(struct skinny_req *req, struct skinnysession *s)
{
	time_t timer;
	struct tm *cmtime;

	if (!(req = req_alloc(sizeof(struct definetimedate_message), DEFINETIMEDATE_MESSAGE)))
		return -1;

	timer = time(NULL);
	cmtime = localtime(&timer);
	req->data.definetimedate.year = htolel(cmtime->tm_year+1900);
	req->data.definetimedate.month = htolel(cmtime->tm_mon+1);
	req->data.definetimedate.dayofweek = htolel(cmtime->tm_wday);
	req->data.definetimedate.day = htolel(cmtime->tm_mday);
	req->data.definetimedate.hour = htolel(cmtime->tm_hour);
	req->data.definetimedate.minute = htolel(cmtime->tm_min);
	req->data.definetimedate.seconds = htolel(cmtime->tm_sec);
	req->data.definetimedate.milliseconds = htolel(0);
	req->data.definetimedate.timestamp = htolel(timer);
	transmit_response(s, req);
	return 1;
}

static int handle_button_template_req_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	int i;

	struct skinny_speeddial *sd;
	struct button_definition_template btn[42];
	int lineInstance = 1;
	int speeddialInstance = 1;
	int buttonCount = 0;

	if (!(req = req_alloc(sizeof(struct button_template_res_message), BUTTON_TEMPLATE_RES_MESSAGE)))
		return -1;

	memset(&btn, 0, sizeof(btn));

	get_button_template(s, btn);

	for (i=0; i<42; i++) {
		int btnSet = 0;
		switch (btn[i].buttonDefinition) {
			case BT_CUST_LINESPEEDDIAL:
				/* assume failure */
				req->data.buttontemplate.definition[i].buttonDefinition = BT_NONE;
				req->data.buttontemplate.definition[i].instanceNumber = htolel(0);

				for (l = d->lines; l; l = l->next) {
					if (l->instance == lineInstance) {
						ast_verbose("Adding button: %d, %d\n", BT_LINE, lineInstance);
						req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
						req->data.buttontemplate.definition[i].instanceNumber = htolel(lineInstance);
						lineInstance++;
						buttonCount++;
						btnSet = 1;
						break;
					}
				}

				if (!btnSet) {
					for (sd = d->speeddials; sd; sd = sd->next) {
						if (sd->instance == speeddialInstance) {
							ast_verbose("Adding button: %d, %d\n", BT_SPEEDDIAL, speeddialInstance);
							req->data.buttontemplate.definition[i].buttonDefinition = BT_SPEEDDIAL;
							req->data.buttontemplate.definition[i].instanceNumber = htolel(speeddialInstance);
							speeddialInstance++;
							buttonCount++;
							btnSet = 1;
							break;
						}
					}
				}
				break;
			case BT_LINE:
				req->data.buttontemplate.definition[i].buttonDefinition = htolel(BT_NONE);
				req->data.buttontemplate.definition[i].instanceNumber = htolel(0);

				for (l = d->lines; l; l = l->next) {
					if (l->instance == lineInstance) {
						ast_verbose("Adding button: %d, %d\n", BT_LINE, lineInstance);
						req->data.buttontemplate.definition[i].buttonDefinition = BT_LINE;
						req->data.buttontemplate.definition[i].instanceNumber = htolel(lineInstance);
						lineInstance++;
						buttonCount++;
						btnSet = 1;
						break;
					}
				}
				break;
			case BT_SPEEDDIAL:
				req->data.buttontemplate.definition[i].buttonDefinition = BT_NONE;
				req->data.buttontemplate.definition[i].instanceNumber = 0;

				for (sd = d->speeddials; sd; sd = sd->next) {
					if (sd->instance == speeddialInstance) {
						ast_verbose("Adding button: %d, %d\n", BT_SPEEDDIAL, speeddialInstance);
						req->data.buttontemplate.definition[i].buttonDefinition = BT_SPEEDDIAL;
						req->data.buttontemplate.definition[i].instanceNumber = htolel(speeddialInstance);
						speeddialInstance++;
						buttonCount++;
						btnSet = 1;
						break;
					}
				}
				break;
			case BT_CUST_HINT:
				break;
			case BT_NONE:
				break;
			default:
				ast_verbose("Adding button: %d, %d\n", btn[i].buttonDefinition, 0);
				req->data.buttontemplate.definition[i].buttonDefinition = htolel(btn[i].buttonDefinition);
				req->data.buttontemplate.definition[i].instanceNumber = htolel(0);
				buttonCount++;
				btnSet = 1;
				break;
		}
	}

	req->data.buttontemplate.buttonOffset = htolel(0);
	req->data.buttontemplate.buttonCount = htolel(buttonCount);
	req->data.buttontemplate.totalButtonCount = htolel(buttonCount);

	if (skinnydebug)
		ast_verbose("Sending %d template to %s\n",
					d->type,
					d->name);
	transmit_response(s, req);
	return 1;
}

static int handle_version_req_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	if (!(req = req_alloc(sizeof(struct version_res_message), VERSION_RES_MESSAGE)))
		return -1;

	ast_copy_string(req->data.version.version, d->version_id, sizeof(req->data.version.version));
	transmit_response(s, req);
	return 1;
}

static int handle_server_request_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	if (!(req = req_alloc(sizeof(struct server_res_message), SERVER_RES_MESSAGE)))
		return -1;

	memcpy(req->data.serverres.server[0].serverName, ourhost,
			sizeof(req->data.serverres.server[0].serverName));
	req->data.serverres.serverListenPort[0] = htolel(ourport);
	req->data.serverres.serverIpAddr[0] = htolel(d->ourip.s_addr);
	transmit_response(s, req);
	return 1;
}

static int handle_alarm_message(struct skinny_req *req, struct skinnysession *s)
{
	/* no response necessary */
	if (skinnydebug)
		ast_verbose("Received Alarm Message: %s\n", req->data.alarm.displayMessage);

	return 1;
}

static int handle_open_receive_channel_ack_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub;
	struct ast_format_list fmt;
	struct sockaddr_in sin;
	struct sockaddr_in us;
	uint32_t addr;
	int port;
	int status;
	int passthruid;

	status = letohl(req->data.openreceivechannelack.status);
	if (status) {
		ast_log(LOG_ERROR, "Open Receive Channel Failure\n");
		return 0;
	}
	addr = letohl(req->data.openreceivechannelack.ipAddr);
	port = letohl(req->data.openreceivechannelack.port);
	passthruid = letohl(req->data.openreceivechannelack.passThruId);

	sin.sin_family = AF_INET;
	sin.sin_addr.s_addr = addr;
	sin.sin_port = htons(port);

	sub = find_subchannel_by_reference(d, passthruid);

	if (!sub)
		return 0;

	l = sub->parent;

	if (sub->rtp) {
		ast_rtp_set_peer(sub->rtp, &sin);
		ast_rtp_get_us(sub->rtp, &us);
	} else {
		ast_log(LOG_ERROR, "No RTP structure, this is very bad\n");
		return 0;
	}

	if (skinnydebug) {
		ast_verbose("ipaddr = %s:%d\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
		ast_verbose("ourip = %s:%d\n", ast_inet_ntoa(d->ourip), ntohs(us.sin_port));
	}

	if (!(req = req_alloc(sizeof(struct start_media_transmission_message), START_MEDIA_TRANSMISSION_MESSAGE)))
		return -1;

	fmt = ast_codec_pref_getsize(&l->prefs, ast_best_codec(l->capability));

	if (skinnydebug)
		ast_verbose("Setting payloadType to '%d' (%d ms)\n", fmt.bits, fmt.cur_ms);

	req->data.startmedia.conferenceId = htolel(sub->callid);
	req->data.startmedia.passThruPartyId = htolel(sub->callid);
	req->data.startmedia.remoteIp = htolel(d->ourip.s_addr);
	req->data.startmedia.remotePort = htolel(ntohs(us.sin_port));
	req->data.startmedia.packetSize = htolel(fmt.cur_ms);
	req->data.startmedia.payloadType = htolel(codec_ast2skinny(fmt.bits));
	req->data.startmedia.qualifier.precedence = htolel(127);
	req->data.startmedia.qualifier.vad = htolel(0);
	req->data.startmedia.qualifier.packets = htolel(0);
	req->data.startmedia.qualifier.bitRate = htolel(0);
	transmit_response(s, req);

	return 1;
}

static int handle_enbloc_call_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub = NULL;
	struct ast_channel *c;
	pthread_t t;

	if (skinnydebug)
		ast_verbose("Received Enbloc Call: %s\n", req->data.enbloccallmessage.calledParty);

	sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);

	if (!sub) {
		l = find_line_by_instance(d, d->lastlineinstance);
		if (!l) {
			return 0;
		}
	} else {
		l = sub->parent;
	}

	c = skinny_new(l, AST_STATE_DOWN);

	if(!c) {
		ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
	} else {
		l->hookstate = SKINNY_OFFHOOK;

		sub = c->tech_pvt;
		transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
		if (skinnydebug)
			ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
		transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
		transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);

		if (!ast_ignore_pattern(c->context, req->data.enbloccallmessage.calledParty)) {
			transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
		}
		ast_copy_string(c->exten, req->data.enbloccallmessage.calledParty, sizeof(c->exten));
		if (ast_pthread_create(&t, NULL, skinny_newcall, c)) {
			ast_log(LOG_WARNING, "Unable to create new call thread: %s\n", strerror(errno));
			ast_hangup(c);
		}
	}
	
	return 1;
}


static int handle_soft_key_set_req_message(struct skinny_req *req, struct skinnysession *s)
{
	int i;
	int x;
	int y;
	const struct soft_key_definitions *softkeymode = soft_key_default_definitions;

	if (!(req = req_alloc(sizeof(struct soft_key_set_res_message), SOFT_KEY_SET_RES_MESSAGE)))
		return -1;

	req->data.softkeysets.softKeySetOffset = htolel(0);
	req->data.softkeysets.softKeySetCount = htolel(11);
	req->data.softkeysets.totalSoftKeySetCount = htolel(11);
	for (x = 0; x < sizeof(soft_key_default_definitions) / sizeof(struct soft_key_definitions); x++) {
		const uint8_t *defaults = softkeymode->defaults;
		/* XXX I wanted to get the size of the array dynamically, but that wasn't wanting to work.
		   This will have to do for now. */
		for (y = 0; y < softkeymode->count; y++) {
			for (i = 0; i < (sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition)); i++) {
				if (defaults[y] == i+1) {
					req->data.softkeysets.softKeySetDefinition[softkeymode->mode].softKeyTemplateIndex[y] = htolel(i+1);
					req->data.softkeysets.softKeySetDefinition[softkeymode->mode].softKeyInfoIndex[y] = htolel(i+301);
				}
			}
		}
		softkeymode++;
	}
	transmit_response(s,req);
	transmit_selectsoftkeys(s, 0, 0, KEYDEF_ONHOOK);
	return 1;
}

static int handle_soft_key_event_message(struct skinny_req *req, struct skinnysession *s)
{
	struct skinny_device *d = s->device;
	struct skinny_line *l;
	struct skinny_subchannel *sub = NULL;
	struct ast_channel *c;
	pthread_t t;
	int event;
	int instance;
	int callreference;

	event = letohl(req->data.softkeyeventmessage.softKeyEvent);
	instance = letohl(req->data.softkeyeventmessage.instance);
	callreference = letohl(req->data.softkeyeventmessage.callreference);

	if (instance) {
		l = find_line_by_instance(d, instance);
		if (callreference) {
			sub = find_subchannel_by_instance_reference(d, instance, callreference);
		} else {
			sub = find_subchannel_by_instance_reference(d, instance, d->lastcallreference);
		}
	} else {
		l = find_line_by_instance(d, d->lastlineinstance);
	}

	if (!l) {
		if (skinnydebug)
			ast_verbose("Received Softkey Event: %d(%d/%d)\n", event, instance, callreference);
		return 0;
	}

	switch(event) {
	case SOFTKEY_NONE:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: None(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_REDIAL:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Redial(%d/%d)\n", instance, callreference);

#if 0
		if (!sub || !sub->owner) {
			c = skinny_new(l, AST_STATE_DOWN);
		} else {
			c = sub->owner;
		}

		if(!c) {
			ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
		} else {
			sub = c->tech_pvt;
			transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			if (skinnydebug)
				ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
			transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
			transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_RINGOUT);

			if (!ast_ignore_pattern(c->context, l->lastnumberdialed)) {
				transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			}
			ast_copy_string(c->exten, l->lastnumberdialed, sizeof(c->exten));
			if (ast_pthread_create(&t, NULL, skinny_newcall, c)) {
				ast_log(LOG_WARNING, "Unable to create new call thread: %s\n", strerror(errno));
				ast_hangup(c);
			}
		}
#endif
		break;
	case SOFTKEY_NEWCALL:  /* Actually the DIAL softkey */
		if (skinnydebug)
			ast_verbose("Received Softkey Event: New Call(%d/%d)\n", instance, callreference);

		if (!sub || !sub->owner) {
			c = skinny_new(l, AST_STATE_DOWN);
		} else {
			c = sub->owner;
		}

		if (!c) {
			ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", l->name, d->name);
		} else {
			sub = c->tech_pvt;
			if (l->hookstate == SKINNY_ONHOOK) {
				l->hookstate = SKINNY_OFFHOOK;
				transmit_speaker_mode(s, SKINNY_SPEAKERON);
				transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			}

			if (skinnydebug)
				ast_verbose("Attempting to Clear display on Skinny %s@%s\n", l->name, d->name);
			transmit_displaymessage(s, NULL, l->instance, sub->callid); /* clear display */
			transmit_tone(s, SKINNY_DIALTONE, l->instance, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_OFFHOOK);

			/* start the switch thread */
			if (ast_pthread_create(&t, NULL, skinny_ss, c)) {
				ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
				ast_hangup(c);
			}
		}
		break;
	case SOFTKEY_HOLD:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Hold(%d/%d)\n", instance, callreference);

		if (sub) {
			if (sub->onhold) {
				skinny_unhold(sub);
			} else {
				skinny_hold(sub);
			}
		}
				
		break;
	case SOFTKEY_TRNSFER:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Transfer(%d/%d)\n", instance, callreference);
		/* XXX figure out how to transfer */
		break;
	case SOFTKEY_CFWDALL:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Forward All(%d/%d)\n", instance, callreference);

		/* Do not disturb */
		if (l->dnd != 0){
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Disabling DND on %s@%s\n", l->name, d->name);
			l->dnd = 0;
			transmit_lamp_indication(s, STIMULUS_FORWARDALL, 1, SKINNY_LAMP_ON);
			transmit_displaynotify(s, "DnD disabled", 10);
		} else {
			if (option_verbose > 2)
				ast_verbose(VERBOSE_PREFIX_3 "Enabling DND on %s@%s\n", l->name, d->name);
			l->dnd = 1;
			transmit_lamp_indication(s, STIMULUS_FORWARDALL, 1, SKINNY_LAMP_OFF);
			transmit_displaynotify(s, "DnD enabled", 10);
		}
		break;
	case SOFTKEY_CFWDBUSY:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Forward Busy (%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_CFWDNOANSWER:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Forward No Answer (%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_BKSPC:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Backspace(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_ENDCALL:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: End Call(%d/%d)\n", instance, callreference);

		if (l->hookstate == SKINNY_ONHOOK) {
			/* Something else already put us back on hook */
			break;
		}
		if (sub) {
			sub->cxmode = SKINNY_CX_RECVONLY;
			l->hookstate = SKINNY_ONHOOK;
			transmit_callstate(s, l->instance, l->hookstate, sub->callid);
			if (skinnydebug)
				ast_verbose("Skinny %s@%s went on hook\n", l->name, d->name);
			if (l->transfer && (sub->owner && sub->next && sub->next->owner) && ((!sub->outgoing) || (sub->next && !sub->next->outgoing))) {
				/* We're allowed to transfer, we have two active calls and
				   we made at least one of the calls.  Let's try and transfer */

#if 0
				if ((res = attempt_transfer(p)) < 0) {
					if (sub->next && sub->next->owner) {
						sub->next->alreadygone = 1;
						ast_queue_hangup(sub->next->owner, 1);
					}
				} else if (res) {
					ast_log(LOG_WARNING, "Transfer attempt failed\n");
					break;
				}
#endif
			} else {
				/* Hangup the current call */
				/* If there is another active call, skinny_hangup will ring the phone with the other call */
				if (sub->owner) {
					sub->alreadygone = 1;
					ast_queue_hangup(sub->owner);
				} else {
					ast_log(LOG_WARNING, "Skinny(%s@%s-%d) channel already destroyed\n",
						l->name, d->name, sub->callid);
	 			}
			}
			if ((l->hookstate == SKINNY_ONHOOK) && (sub->next && !sub->next->rtp)) {
				do_housekeeping(s);
			}
		}
		break;
	case SOFTKEY_RESUME:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Resume(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_ANSWER:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Answer(%d/%d)\n", instance, callreference);

		transmit_ringer_mode(s,SKINNY_RING_OFF);
		transmit_lamp_indication(s, STIMULUS_LINE, l->instance, SKINNY_LAMP_ON);

		l->hookstate = SKINNY_OFFHOOK;

		if (sub && sub->outgoing) {
			/* We're answering a ringing call */
			ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
			transmit_callstate(s, l->instance, SKINNY_OFFHOOK, sub->callid);
			transmit_tone(s, SKINNY_SILENCE, l->instance, sub->callid);
			transmit_callstate(s, l->instance, SKINNY_CONNECTED, sub->callid);
			transmit_selectsoftkeys(s, l->instance, sub->callid, KEYDEF_CONNECTED);
			start_rtp(sub);
			ast_setstate(sub->owner, AST_STATE_UP);
		}
		break;
	case SOFTKEY_INFO:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Info(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_CONFRN:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Conference(%d/%d)\n", instance, callreference);
		/* XXX determine the best way to pull off a conference.  Meetme? */
		break;
	case SOFTKEY_PARK:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Park Call(%d/%d)\n", instance, callreference);
		/* XXX Park the call */
		break;
	case SOFTKEY_JOIN:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Join(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_MEETME:
		/* XXX How is this different from CONFRN? */
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Meetme(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_PICKUP:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Pickup(%d/%d)\n", instance, callreference);
		break;
	case SOFTKEY_GPICKUP:
		if (skinnydebug)
			ast_verbose("Received Softkey Event: Group Pickup(%d/%d)\n", instance, callreference);
		break;
	default:
		if (skinnydebug)
			ast_verbose("Received unknown Softkey Event: %d(%d/%d)\n", event, instance, callreference);
		break;
	}
	return 1;
}

static int handle_unregister_message(struct skinny_req *req, struct skinnysession *s)
{
	return skinny_unregister(req, s);
}

static int handle_soft_key_template_req_message(struct skinny_req *req, struct skinnysession *s)
{
	if (!(req = req_alloc(sizeof(struct soft_key_template_res_message), SOFT_KEY_TEMPLATE_RES_MESSAGE)))
		return -1;

	req->data.softkeytemplate.softKeyOffset = htolel(0);
	req->data.softkeytemplate.softKeyCount	= htolel(sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition));
	req->data.softkeytemplate.totalSoftKeyCount = htolel(sizeof(soft_key_template_default) / sizeof(struct soft_key_template_definition));
	memcpy(req->data.softkeytemplate.softKeyTemplateDefinition,
		soft_key_template_default,
		sizeof(soft_key_template_default));
	transmit_response(s,req);
	return 1;
}

static int handle_headset_status_message(struct skinny_req *req, struct skinnysession *s)
{
	/* XXX umm...okay?  Why do I care? */
	return 1;
}

static int handle_register_available_lines_message(struct skinny_req *req, struct skinnysession *s)
{
	/* XXX I have no clue what this is for, but my phone was sending it, so... */
	return 1;
}

static int handle_message(struct skinny_req *req, struct skinnysession *s)
{
	int res = 0;
	struct skinny_device *d = s->device;
	struct skinny_subchannel *sub;
	int lineInstance;
	int callReference;

	if ((!s->device) && (letohl(req->e) != REGISTER_MESSAGE && letohl(req->e) != ALARM_MESSAGE)) {
		ast_log(LOG_WARNING, "Client sent message #%d without first registering.\n", req->e);
		free(req);
		return 0;
	}

	switch(letohl(req->e))	{
	case KEEP_ALIVE_MESSAGE:
		res = handle_keep_alive_message(req, s);
		break;
	case REGISTER_MESSAGE:
		if (skinnydebug)
			ast_verbose("Device %s is attempting to register\n", req->data.reg.name);

		res = handle_register_message(req, s);
		break;
	case IP_PORT_MESSAGE:
		res = handle_ip_port_message(req, s);
		break;
	case KEYPAD_BUTTON_MESSAGE:
		if (skinnydebug)
			ast_verbose("Collected digit: [%d]\n", letohl(req->data.keypad.button));

		lineInstance = letohl(req->data.keypad.lineInstance);
		callReference = letohl(req->data.keypad.callReference);

		sub = find_subchannel_by_instance_reference(d, lineInstance, callReference);

		if (sub && (sub->owner && sub->owner->_state <  AST_STATE_UP)) {
			char dgt;
			int digit = letohl(req->data.keypad.button);
			size_t len;

			if (digit == 14) {
				dgt = '*';
			} else if (digit == 15) {
				dgt = '#';
			} else if (digit >= 0 && digit <= 9) {
				dgt = '0' + digit;
			} else {
				/* digit=10-13 (A,B,C,D ?), or
		 		* digit is bad value
		 		*
		 		* probably should not end up here, but set
		 		* value for backward compatibility, and log
		 		* a warning.
		 		*/
				dgt = '0' + digit;
				ast_log(LOG_WARNING, "Unsupported digit %d\n", digit);
			}

			len = strlen(d->exten);
			if (len < sizeof(d->exten) - 1) {
				d->exten[len] = dgt;
				d->exten[len+1] = '\0';
			} else {
				ast_log(LOG_WARNING, "Dropping digit with value %d because digit queue is full\n", dgt);
			}
		} else
			res = handle_keypad_button_message(req, s);
		break;
	case ENBLOC_CALL_MESSAGE:
		res = handle_enbloc_call_message(req, s);
		break;
	case STIMULUS_MESSAGE:
		res = handle_stimulus_message(req, s);
		break;
	case OFFHOOK_MESSAGE:
		res = handle_offhook_message(req, s);
		break;
	case ONHOOK_MESSAGE:
		res = handle_onhook_message(req, s);
		break;
	case CAPABILITIES_RES_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received CapabilitiesRes\n");

		res = handle_capabilities_res_message(req, s);
		break;
	case SPEED_DIAL_STAT_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received SpeedDialStatRequest\n");

		res = handle_speed_dial_stat_req_message(req, s);
		break;
	case LINE_STATE_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received LineStatRequest\n");
		res = handle_line_state_req_message(req, s);
		break;
	case TIME_DATE_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received Time/Date Request\n");

		res = handle_time_date_req_message(req, s);
		break;
	case BUTTON_TEMPLATE_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Buttontemplate requested\n");

		res = handle_button_template_req_message(req, s);
		break;
	case VERSION_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Version Request\n");

		res = handle_version_req_message(req, s);
		break;
	case SERVER_REQUEST_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received Server Request\n");

		res = handle_server_request_message(req, s);
		break;
	case ALARM_MESSAGE:
		res = handle_alarm_message(req, s);
		break;
	case OPEN_RECEIVE_CHANNEL_ACK_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received Open Receive Channel Ack\n");

		res = handle_open_receive_channel_ack_message(req, s);
		break;
	case SOFT_KEY_SET_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received SoftKeySetReq\n");

		res = handle_soft_key_set_req_message(req, s);
		break;
	case SOFT_KEY_EVENT_MESSAGE:
		res = handle_soft_key_event_message(req, s);
		break;
	case UNREGISTER_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received Unregister Request\n");

		res = handle_unregister_message(req, s);
		break;
	case SOFT_KEY_TEMPLATE_REQ_MESSAGE:
		if (skinnydebug)
			ast_verbose("Received SoftKey Template Request\n");

		res = handle_soft_key_template_req_message(req, s);
		break;
	case HEADSET_STATUS_MESSAGE:
		res = handle_headset_status_message(req, s);
		break;
	case REGISTER_AVAILABLE_LINES_MESSAGE:
		res = handle_register_available_lines_message(req, s);
		break;
	default:
		if (skinnydebug)
			ast_verbose("RECEIVED UNKNOWN MESSAGE TYPE:  %x\n", letohl(req->e));
		break;
	}
	if (res >= 0 && req)
		free(req);
	return res;
}

static void destroy_session(struct skinnysession *s)
{
	struct skinnysession *cur, *prev = NULL;
	ast_mutex_lock(&sessionlock);
	cur = sessions;
	while(cur) {
		if (cur == s) {
			break;
		}
		prev = cur;
		cur = cur->next;
	}
	if (cur) {
		if (prev) {
			prev->next = cur->next;
		} else {
			sessions = cur->next;
		}
		if (s->fd > -1) {
			close(s->fd);
		}
		ast_mutex_destroy(&s->lock);
		free(s);
	} else {
		ast_log(LOG_WARNING, "Trying to delete nonexistent session %p?\n", s);
	}
	ast_mutex_unlock(&sessionlock);
}

static int get_input(struct skinnysession *s)
{
	int res;
	int dlen = 0;
	struct pollfd fds[1];

 	fds[0].fd = s->fd;
	fds[0].events = POLLIN;
	fds[0].revents = 0;
	res = ast_poll(fds, 1, (keep_alive * 1100)); /* If nothing has happen, client is dead */
						 /* we add 10% to the keep_alive to deal */
						 /* with network delays, etc */
	if (res < 0) {
		if (errno != EINTR) {
			ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
			return res;
		}
 	} else if (res == 0) {
		if (skinnydebug)
			ast_verbose("Skinny Client was lost, unregistering\n");
		skinny_unregister(NULL, s);
		return -1;
	}
		     
	if (fds[0].revents) {
		ast_mutex_lock(&s->lock);
		memset(s->inbuf,0,sizeof(s->inbuf));
		res = read(s->fd, s->inbuf, 4);
		if (res < 0) {
			ast_log(LOG_WARNING, "read() returned error: %s\n", strerror(errno));

			if (skinnydebug)
				ast_verbose("Skinny Client was lost, unregistering\n");
	      
			skinny_unregister(NULL,s);
			ast_mutex_unlock(&s->lock);
			return res;
		} else if (res != 4) {
			ast_log(LOG_WARNING, "Skinny Client sent less data than expected.  Expected 4 but got %d.\n", res);
			ast_mutex_unlock(&s->lock);
			
			if (res == 0) {
				if (skinnydebug)
					ast_verbose("Skinny Client was lost, unregistering\n");
				skinny_unregister(NULL, s);
			}
		     
			return -1;
		}
		
		dlen = letohl(*(int *)s->inbuf);
		if (dlen < 4) {
			ast_log(LOG_WARNING, "Skinny Client sent invalid data.\n");
			ast_mutex_unlock(&s->lock);
			return -1;
		}
		if (dlen+8 > sizeof(s->inbuf)) {
			dlen = sizeof(s->inbuf) - 8;
		}
		*(int *)s->inbuf = htolel(dlen);

		res = read(s->fd, s->inbuf+4, dlen+4);
		ast_mutex_unlock(&s->lock);
		if (res < 0) {
			ast_log(LOG_WARNING, "read() returned error: %s\n", strerror(errno));
			return res;
		} else if (res != (dlen+4)) {
			ast_log(LOG_WARNING, "Skinny Client sent less data than expected.\n");
			return -1;
		}
		return res;
	}
	return 0;
}

static struct skinny_req *skinny_req_parse(struct skinnysession *s)
{
	struct skinny_req *req;

	if (!(req = ast_calloc(1, SKINNY_MAX_PACKET)))
		return NULL;

	ast_mutex_lock(&s->lock);
	memcpy(req, s->inbuf, skinny_header_size);
	memcpy(&req->data, s->inbuf+skinny_header_size, letohl(*(int*)(s->inbuf))-4);

	ast_mutex_unlock(&s->lock);

	if (letohl(req->e) < 0) {
		ast_log(LOG_ERROR, "Event Message is NULL from socket %d, This is bad\n", s->fd);
		free(req);
		return NULL;
	}

	return req;
}

static void *skinny_session(void *data)
{
	int res;
	struct skinny_req *req;
	struct skinnysession *s = data;

	if (option_verbose > 2)
		ast_verbose(VERBOSE_PREFIX_3 "Starting Skinny session from %s\n", ast_inet_ntoa(s->sin.sin_addr));

	for (;;) {
		res = get_input(s);
		if (res < 0) {
			break;
		}

		if (res > 0)
		{
			if (!(req = skinny_req_parse(s))) {
				destroy_session(s);
				return NULL;
			}

			res = handle_message(req, s);
			if (res < 0) {
				destroy_session(s);
				return NULL;
			}
		}
	}
	ast_log(LOG_NOTICE, "Skinny Session returned: %s\n", strerror(errno));

	if (s) 
		destroy_session(s);
	
	return 0;
}

static void *accept_thread(void *ignore)
{
	int as;
	struct sockaddr_in sin;
	socklen_t sinlen;
	struct skinnysession *s;
	struct protoent *p;
	int arg = 1;
	pthread_attr_t attr;
	pthread_t tcp_thread;

	pthread_attr_init(&attr);
	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

	for (;;) {
		sinlen = sizeof(sin);
		as = accept(skinnysock, (struct sockaddr *)&sin, &sinlen);
		if (as < 0) {
			ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
			continue;
		}
		p = getprotobyname("tcp");
		if(p) {
			if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
				ast_log(LOG_WARNING, "Failed to set Skinny tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
			}
		}
		if (!(s = ast_calloc(1, sizeof(struct skinnysession))))
			continue;

		memcpy(&s->sin, &sin, sizeof(sin));
		ast_mutex_init(&s->lock);
		s->fd = as;
		ast_mutex_lock(&sessionlock);
		s->next = sessions;
		sessions = s;
		ast_mutex_unlock(&sessionlock);

		if (ast_pthread_create(&tcp_thread, &attr, skinny_session, s)) {
			destroy_session(s);
		}
	}
	if (skinnydebug)
		ast_verbose("killing accept thread\n");
	close(as);
	pthread_attr_destroy(&attr);
	return 0;
}

static void *do_monitor(void *data)
{
	int res;

	/* This thread monitors all the interfaces which are not yet in use
	   (and thus do not have a separate thread) indefinitely */
	/* From here on out, we die whenever asked */
	for(;;) {
		pthread_testcancel();
		/* Wait for sched or io */
		res = ast_sched_wait(sched);
		if ((res < 0) || (res > 1000)) {
			res = 1000;
		}
		res = ast_io_wait(io, res);
		ast_mutex_lock(&monlock);
		if (res >= 0) {
			ast_sched_runq(sched);
		}
		ast_mutex_unlock(&monlock);
	}
	/* Never reached */
	return NULL;

}

static int restart_monitor(void)
{
	/* If we're supposed to be stopped -- stay stopped */
	if (monitor_thread == AST_PTHREADT_STOP)
		return 0;

	ast_mutex_lock(&monlock);
	if (monitor_thread == pthread_self()) {
		ast_mutex_unlock(&monlock);
		ast_log(LOG_WARNING, "Cannot kill myself\n");
		return -1;
	}
	if (monitor_thread != AST_PTHREADT_NULL) {
		/* Wake up the thread */
		pthread_kill(monitor_thread, SIGURG);
	} else {
		/* Start a new monitor */
		if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
			ast_mutex_unlock(&monlock);
			ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
			return -1;
		}
	}
	ast_mutex_unlock(&monlock);
	return 0;
}

static struct ast_channel *skinny_request(const char *type, int format, void *data, int *cause)
{
	int oldformat;
	
	struct skinny_line *l;
	struct ast_channel *tmpc = NULL;
	char tmp[256];
	char *dest = data;

	oldformat = format;
	
	if (!(format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1))) {
		ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
		return NULL;	
	}		

	ast_copy_string(tmp, dest, sizeof(tmp));
	if (ast_strlen_zero(tmp)) {
		ast_log(LOG_NOTICE, "Skinny channels require a device\n");
		return NULL;
	}
	l = find_line_by_name(tmp);
	if (!l) {
		ast_log(LOG_NOTICE, "No available lines on: %s\n", dest);
		return NULL;
	}
	if (option_verbose > 2) {
		ast_verbose(VERBOSE_PREFIX_3 "skinny_request(%s)\n", tmp);
	}
	tmpc = skinny_new(l, AST_STATE_DOWN);
	if (!tmpc) {
		ast_log(LOG_WARNING, "Unable to make channel for '%s'\n", tmp);
	}
	restart_monitor();
	return tmpc;
}

static int reload_config(void)
{
	int on = 1;
	struct ast_config *cfg;
	struct ast_variable *v;
	char *cat;
	struct skinny_device *d;
	int oldport = ntohs(bindaddr.sin_port);

	if (gethostname(ourhost, sizeof(ourhost))) {
		ast_log(LOG_WARNING, "Unable to get hostname, Skinny disabled\n");
		return 0;
	}
	cfg = ast_config_load(config);

	/* We *must* have a config file otherwise stop immediately */
	if (!cfg) {
		ast_log(LOG_NOTICE, "Unable to load config %s, Skinny disabled\n", config);
		return -1;
	}
	memset(&bindaddr, 0, sizeof(bindaddr));
	memset(&default_prefs, 0, sizeof(default_prefs));

	/* Copy the default jb config over global_jbconf */
	memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));

	/* load the general section */
	v = ast_variable_browse(cfg, "general");
	while (v) {
		/* handle jb conf */
		if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
			v = v->next;
			continue;
		}

		/* Create the interface list */
		if (!strcasecmp(v->name, "bindaddr")) {
			if (!(hp = ast_gethostbyname(v->value, &ahp))) {
				ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
			} else {
				memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
			}
		} else if (!strcasecmp(v->name, "keepalive")) {
			keep_alive = atoi(v->value);
		} else if (!strcasecmp(v->name, "dateformat")) {
			memcpy(date_format, v->value, sizeof(date_format));
		} else if (!strcasecmp(v->name, "allow")) {
			ast_parse_allow_disallow(&default_prefs, &default_capability, v->value, 1);
		} else if (!strcasecmp(v->name, "disallow")) {
			ast_parse_allow_disallow(&default_prefs, &default_capability, v->value, 0);
		} else if (!strcasecmp(v->name, "bindport") || !strcasecmp(v->name, "port")) {
			if (sscanf(v->value, "%d", &ourport) == 1) {
				bindaddr.sin_port = htons(ourport);
			} else {
				ast_log(LOG_WARNING, "Invalid bindport '%s' at line %d of %s\n", v->value, v->lineno, config);
			}
			if (!strcasecmp(v->name, "port")) { /*! \todo Remove 'port' option after 1.4 */
				ast_log(LOG_WARNING, "Option 'port' at line %d of %s has been deprecated.  Please use 'bindport' instead.\n", v->lineno, config);
			}
		}
		v = v->next;
	}

	if (ntohl(bindaddr.sin_addr.s_addr)) {
		__ourip = bindaddr.sin_addr;
	} else {
		hp = ast_gethostbyname(ourhost, &ahp);
		if (!hp) {
			ast_log(LOG_WARNING, "Unable to get our IP address, Skinny disabled\n");
			ast_config_destroy(cfg);
			return 0;
		}
		memcpy(&__ourip, hp->h_addr, sizeof(__ourip));
	}
	if (!ntohs(bindaddr.sin_port)) {
		bindaddr.sin_port = ntohs(DEFAULT_SKINNY_PORT);
	}
	bindaddr.sin_family = AF_INET;

	/* load the device sections */
	cat = ast_category_browse(cfg, NULL);
	while(cat) {
		if (!strcasecmp(cat, "general")) {
			/* Nothing to do */
#if 0
		} else if (!strncasecmp(cat, "paging-", 7)) {
			p = build_paging_device(cat, ast_variable_browse(cfg, cat));
			if (p) {
			}
#endif
		} else {
			d = build_device(cat, ast_variable_browse(cfg, cat));
			if (d) {
				if (option_verbose > 2)
					ast_verbose(VERBOSE_PREFIX_3 "Added device '%s'\n", d->name);
				ast_mutex_lock(&devicelock);
				d->next = devices;
				devices = d;
				ast_mutex_unlock(&devicelock);
			}
		}
		cat = ast_category_browse(cfg, cat);
	}
	ast_mutex_lock(&netlock);
	if ((skinnysock > -1) && (ntohs(bindaddr.sin_port) != oldport)) {
		close(skinnysock);
		skinnysock = -1;
	}
	if (skinnysock < 0) {
		skinnysock = socket(AF_INET, SOCK_STREAM, 0);
		if(setsockopt(skinnysock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
			ast_log(LOG_ERROR, "Set Socket Options failed: errno %d, %s\n", errno, strerror(errno));
			ast_config_destroy(cfg);
			ast_mutex_unlock(&netlock);
			return 0;
		}
		if (skinnysock < 0) {
			ast_log(LOG_WARNING, "Unable to create Skinny socket: %s\n", strerror(errno));
		} else {
			if (bind(skinnysock, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) {
				ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n",
						ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port),
							strerror(errno));
				close(skinnysock);
				skinnysock = -1;
				ast_config_destroy(cfg);
				ast_mutex_unlock(&netlock);
				return 0;
			}
			if (listen(skinnysock,DEFAULT_SKINNY_BACKLOG)) {
					ast_log(LOG_WARNING, "Failed to start listening to %s:%d: %s\n",
						ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port),
							strerror(errno));
					close(skinnysock);
					skinnysock = -1;
					ast_config_destroy(cfg);
					ast_mutex_unlock(&netlock);
					return 0;
			}
			if (option_verbose > 1)
				ast_verbose(VERBOSE_PREFIX_2 "Skinny listening on %s:%d\n",
					ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port));
			ast_pthread_create_background(&accept_t,NULL, accept_thread, NULL);
		}
	}
	ast_mutex_unlock(&netlock);
	ast_config_destroy(cfg);
	return 1;
}

static void delete_devices(void)
{
	struct skinny_device *d, *dlast;
	struct skinny_line *l, *llast;
	struct skinny_speeddial *sd, *sdlast;
	struct skinny_addon *a, *alast;

	ast_mutex_lock(&devicelock);

	/* Delete all devices */
	for (d=devices;d;) {
		/* Delete all lines for this device */
		for (l=d->lines;l;) {
			llast = l;
			l = l->next;
			ast_mutex_destroy(&llast->lock);
			free(llast);
		}
		/* Delete all speeddials for this device */
		for (sd=d->speeddials;sd;) {
			sdlast = sd;
			sd = sd->next;
			ast_mutex_destroy(&sdlast->lock);
			free(sdlast);
		}
		/* Delete all addons for this device */
		for (a=d->addons;a;) {
			alast = a;
			a = a->next;
			ast_mutex_destroy(&alast->lock);
			free(alast);
		}
		dlast = d;
		d = d->next;
		free(dlast);
	}
	devices=NULL;
	ast_mutex_unlock(&devicelock);
}

#if 0
/*
 * XXX This never worked properly anyways.
 * Let's get rid of it, until we can fix it.
 */
static int reload(void)
{
	delete_devices();
	reload_config();
	restart_monitor();
	return 0;
}
#endif

static int load_module(void)
{
	int res = 0;

	for (; res < (sizeof(soft_key_template_default) / sizeof(soft_key_template_default[0])); res++) {
		soft_key_template_default[res].softKeyEvent = htolel(soft_key_template_default[res].softKeyEvent);
	}
	/* load and parse config */
	res = reload_config();
	if (res == -1) {
		return AST_MODULE_LOAD_DECLINE;
	}

	/* Make sure we can register our skinny channel type */
	if (ast_channel_register(&skinny_tech)) {
		ast_log(LOG_ERROR, "Unable to register channel class 'Skinny'\n");
		return -1;
	}

	ast_rtp_proto_register(&skinny_rtp);
	ast_cli_register_multiple(cli_skinny, sizeof(cli_skinny) / sizeof(struct ast_cli_entry));
	sched = sched_context_create();
	if (!sched) {
		ast_log(LOG_WARNING, "Unable to create schedule context\n");
	}
	io = io_context_create();
	if (!io) {
		ast_log(LOG_WARNING, "Unable to create I/O context\n");
	}
	/* And start the monitor for the first time */
	restart_monitor();

	return res;
}

static int unload_module(void)
{
	struct skinnysession *s, *slast;
	struct skinny_device *d;
	struct skinny_line *l;
	struct skinny_subchannel *sub;

	ast_mutex_lock(&sessionlock);
	/* Destroy all the interfaces and free their memory */
	s = sessions;
	while(s) {
		slast = s;
		s = s->next;
		for (d = slast->device; d; d = d->next) {
			for (l = d->lines; l; l = l->next) {
				ast_mutex_lock(&l->lock);
				for (sub = l->sub; sub; sub = sub->next) {
					ast_mutex_lock(&sub->lock);
					if (sub->owner) {
						sub->alreadygone = 1;
						ast_softhangup(sub->owner, AST_SOFTHANGUP_APPUNLOAD);
					}
					ast_mutex_unlock(&sub->lock);
				}
				ast_mutex_unlock(&l->lock);
			}
		}
		if (slast->fd > -1)
			close(slast->fd);
		ast_mutex_destroy(&slast->lock);
		free(slast);
	}
	sessions = NULL;
	ast_mutex_unlock(&sessionlock);

	delete_devices();

	ast_mutex_lock(&monlock);
	if ((monitor_thread != AST_PTHREADT_NULL) && (monitor_thread != AST_PTHREADT_STOP)) {
		pthread_cancel(monitor_thread);
		pthread_kill(monitor_thread, SIGURG);
		pthread_join(monitor_thread, NULL);
	}
	monitor_thread = AST_PTHREADT_STOP;
	ast_mutex_unlock(&monlock);

	ast_mutex_lock(&netlock);
	if (accept_t && (accept_t != AST_PTHREADT_STOP)) {
		pthread_cancel(accept_t);
		pthread_kill(accept_t, SIGURG);
		pthread_join(accept_t, NULL);
	}
	accept_t = AST_PTHREADT_STOP;
	ast_mutex_unlock(&netlock);

	ast_rtp_proto_unregister(&skinny_rtp);
	ast_channel_unregister(&skinny_tech);
	ast_cli_unregister_multiple(cli_skinny, sizeof(cli_skinny) / sizeof(struct ast_cli_entry));

	close(skinnysock);
	if (sched)
		sched_context_destroy(sched);

	return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Skinny Client Control Protocol (Skinny)",
		.load = load_module,
		.unload = unload_module,
	       );