Wed Aug 20 06:36:52 2008

Asterisk developer's documentation

---

chan_skinny.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * chan_skinny was developed by Jeremy McNamara & Florian Overkamp
 *
 * 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
 * \ingroup channel_drivers
 */


#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.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 75449 $")

#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"

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

/* Just about everybody seems to support ulaw, so make it a nice default */
static int capability = AST_FORMAT_ULAW;

#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";

/* these should be in an include file, but dunno what to include */
typedef unsigned char  UINT8;
typedef unsigned short UINT16;
typedef unsigned int   UINT32;

#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__)
#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


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

#define  REGISTER_MESSAGE 0x0001
typedef struct register_message {
   char name[16];
   int userId;
   int instance;
   char ip[4];
   int type;
   int maxStreams;
} register_message;

#define IP_PORT_MESSAGE 0x0002

#define KEYPAD_BUTTON_MESSAGE 0x0003
typedef struct keypad_button_message {
   int button;
} keypad_button_message;

#define STIMULUS_MESSAGE 0x0005
typedef struct stimulus_message {
   int stimulus;
   int stimulusInstance;
} stimulus_message;
      
#define OFFHOOK_MESSAGE 0x0006
#define ONHOOK_MESSAGE 0x0007

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

typedef struct capabilities_res_message {
   int count;
   struct station_capabilities caps[18];
} capabilities_res_message;

#define SPEED_DIAL_STAT_REQ_MESSAGE 0x000A
typedef struct speed_dial_stat_req_message {
   int speedDialNumber;
} speed_dial_stat_req_message;

#define  LINE_STATE_REQ_MESSAGE 0x000B
typedef struct line_state_req_message {
   int lineNumber;
} line_state_req_message;

#define  TIME_DATE_REQ_MESSAGE 0x000D
#define  VERSION_REQ_MESSAGE 0x000F
#define BUTTON_TEMPLATE_REQ_MESSAGE 0x000E
#define SERVER_REQUEST_MESSAGE 0x0012
#define ALARM_MESSAGE 0x0020

#define OPEN_RECIEVE_CHANNEL_ACK_MESSAGE 0x0022 
typedef struct open_recieve_channel_ack_message {
   int status;
   char ipAddr[4];
   int port;
   int passThruId;
} open_recieve_channel_ack_message;

#define  SOFT_KEY_SET_REQ_MESSAGE 0x0025
#define UNREGISTER_MESSAGE 0x0027
#define  SOFT_KEY_TEMPLATE_REQ_MESSAGE 0x0028

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

#define  START_TONE_MESSAGE 0x0082
typedef struct start_tone_message {
   int tone;
} start_tone_message;

#define STOP_TONE_MESSAGE 0x0083

#define SET_RINGER_MESSAGE 0x0085
typedef struct set_ringer_message {
   int ringerMode;
} set_ringer_message;

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

#define SET_SPEAKER_MESSAGE 0x0088 
typedef struct set_speaker_message {
   int mode;
} set_speaker_message;

#define START_MEDIA_TRANSMISSION_MESSAGE 0x008A
typedef struct media_qualifier {
   int precedence;
   int vad;
   int packets;
   int bitRate;
} media_qualifier;

typedef struct start_media_transmission_message {
   int conferenceId;
   int passThruPartyId;
   char remoteIp[4];
   int remotePort;
   int packetSize;
   int payloadType;
   media_qualifier qualifier;
} start_media_transmission_message;

#define STOP_MEDIA_TRANSMISSION_MESSAGE 0x008B
typedef struct stop_media_transmission_message {
   int conferenceId;
        int passThruPartyId;
} stop_media_transmission_message;

#define CALL_INFO_MESSAGE 0x008F
typedef struct call_info_message {
   char callingPartyName[40];
   char callingParty[24];
   char calledPartyName[40];
   char calledParty[24];
   int  instance;
   int  reference;
   int  type;
   char originalCalledPartyName[40];
   char originalCalledParty[24];
} call_info_message;

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

#define LINE_STAT_RES_MESSAGE 0x0092
typedef struct line_stat_res_message {
   int  linenumber;
   char lineDirNumber[24];
   char lineDisplayName[42];
   int  space;
} line_stat_res_message;

#define DEFINETIMEDATE_MESSAGE 0x0094
typedef struct definetimedate_message {
   int year;   /* since 1900 */
   int month;
   int dayofweek; /* monday = 1 */
   int day;
   int hour;
   int minute;
   int seconds;
   int milliseconds;
   int timestamp;
} definetimedate_message;
 
#define DISPLAYTEXT_MESSAGE 0x0099
typedef struct displaytext_message {
   char text[40];
} displaytext_message;

#define CLEAR_DISPLAY_MESSAGE 0x009A

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

#define CAPABILITIES_REQ_MESSAGE 0x009B

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

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

#define BUTTON_TEMPLATE_RES_MESSAGE 0x0097

typedef struct buttondefinition {
   UINT8 instanceNumber;
   UINT8 buttonDefinition;
} button_definition;

#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_definition button_def_30vip[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE },      /* Line 2 */
   { 3, STIMULUS_LINE },      /* Line 3 */
   { 4, STIMULUS_LINE },      /* Line 4 */
   { 1, STIMULUS_CALLPARK },  /* Call Park */
   { 0, STIMULUS_NONE },
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }, /* Speeddial 3 */
   { 4, STIMULUS_SPEEDDIAL }, /* Speeddial 4 */
   { 5, STIMULUS_SPEEDDIAL }, /* Speeddial 5 */
   { 6, STIMULUS_SPEEDDIAL }, /* Speeddial 6 */
   { 1, STIMULUS_VOICEMAIL }, /* Voicemail */
   { 1, STIMULUS_FORWARDALL },   /* Forward All */
   { 1, STIMULUS_CONFERENCE },   /* Conference */
   { 0, STIMULUS_NONE },
   { 0, STIMULUS_NONE },
   { 0, STIMULUS_NONE },
   { 0, STIMULUS_NONE },
   { 0, STIMULUS_NONE },
   { 7, STIMULUS_SPEEDDIAL }, /* Speeddial 7 */
   { 8, STIMULUS_SPEEDDIAL }, /* Speeddial 8 */
   { 9, STIMULUS_SPEEDDIAL }, /* Speeddial 9 */
   { 10, STIMULUS_SPEEDDIAL } /* Speeddial 10 */
};

button_definition button_def_12sp[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }, /* Speeddial 3 */
   { 4, STIMULUS_SPEEDDIAL }, /* Speeddial 4 */
   { 1, STIMULUS_VOICEMAIL }, /* Voicemail */
   { 5, STIMULUS_SPEEDDIAL }, /* Speeddial 5 */
   { 6, STIMULUS_SPEEDDIAL }, /* Speeddial 6 */
   { 7, STIMULUS_SPEEDDIAL }, /* Speeddial 7 */
   { 8, STIMULUS_SPEEDDIAL }, /* Speeddial 8 */
   { 9, STIMULUS_SPEEDDIAL }  /* Speeddial 9 */
};

button_definition button_def_7902[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 1, STIMULUS_HOLD },      /* Hold */
   { 1, STIMULUS_TRANSFER },  
   { 1, STIMULUS_DISPLAY },
   { 1, STIMULUS_VOICEMAIL },
   { 1, STIMULUS_CONFERENCE },
   { 1, STIMULUS_FORWARDALL },
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }, /* Speeddial 3 */
   { 4, STIMULUS_SPEEDDIAL }, /* Speeddial 4 */
   { 1, STIMULUS_REDIAL }
};

button_definition button_def_7910[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 1, STIMULUS_HOLD },      /* Hold */
   { 1, STIMULUS_TRANSFER },  
   { 1, STIMULUS_DISPLAY },
   { 1, STIMULUS_VOICEMAIL },
   { 1, STIMULUS_CONFERENCE },
   { 1, STIMULUS_FORWARDALL },
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 1, STIMULUS_REDIAL }
};

button_definition button_def_7920[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE },      /* Line 2 */
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }, /* Speeddial 3 */
   { 4, STIMULUS_SPEEDDIAL }  /* Speeddial 4 */
};

button_definition button_def_7935[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE }    /* Line 2 */
};

button_definition button_def_7940[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE }    /* Line 2 */
};

button_definition button_def_7960[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE },      /* Line 2 */
   { 3, STIMULUS_LINE },      /* Line 3 */
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }  /* Speeddial 3 */
};

button_definition button_def_7970[] = {
   { 1, STIMULUS_LINE },      /* Line 1 */
   { 2, STIMULUS_LINE },      /* Line 2 */
   { 3, STIMULUS_LINE },      /* Line 3 */
   { 1, STIMULUS_SPEEDDIAL }, /* Speeddial 1 */
   { 2, STIMULUS_SPEEDDIAL }, /* Speeddial 2 */
   { 3, STIMULUS_SPEEDDIAL }, /* Speeddial 3 */
   { 4, STIMULUS_SPEEDDIAL }, /* Speeddial 4 */
   { 5, STIMULUS_SPEEDDIAL }  /* Speeddial 5 */
};

button_definition button_def_none = { 0, STIMULUS_NONE };

typedef struct button_defs {
   char *type;
   int num_buttons;
   button_definition *button_def;
} button_defs_t;

button_defs_t button_defs[] = {
   { "12SP",   12,   button_def_12sp }, /* First one is used if 
                        there's no match */
   { "30VIP",  26,   button_def_30vip },
   { "7902",   12,   button_def_7902 },
   { "7910",   10,   button_def_7910 },
   { "7920",   6, button_def_7920 },
   { "7935",   2, button_def_7935 },
   { "7940",   2, button_def_7940 },
   { "7960",   6, button_def_7960 },
   { "7970",   8, button_def_7970 },
   { NULL,     0, NULL }
};

typedef struct button_template_res_message {
   UINT32 buttonOffset;
   UINT32 buttonCount;
   UINT32 totalButtonCount;
   button_definition definition[42];
} button_template_res_message;

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

#define  KEEP_ALIVE_ACK_MESSAGE 0x0100

#define OPEN_RECIEVE_CHANNEL_MESSAGE 0x0105
typedef struct open_recieve_channel_message {
   int conferenceId;
   int partyId;
   int packets;
   int capability;
   int echo;
   int bitrate;
} open_recieve_channel_message;

#define CLOSE_RECIEVE_CHANNEL_MESSAGE 0x0106
typedef struct close_recieve_channel_message {
   int conferenceId;
   int partyId;
} close_recieve_channel_message;

#define  SOFT_KEY_TEMPLATE_RES_MESSAGE 0x0108

typedef struct soft_key_template_definition {
   char softKeyLabel[16];
   int softKeyEvent;
} soft_key_template_definition;

soft_key_template_definition soft_key_template_default[] = {
   { "Redial",    1 },
   { "NewCall",      2 },
   { "Hold",      3 },
   { "Trnsfer",      4 },
   { "CFwdAll",      5 },
   { "CFwdBusy",     6 },
   { "CFwdNoAnswer", 7 },
   { "<<",        8 },
   { "EndCall",      9 },
   { "Resume",    10 },
   { "Answer",    11 },
   { "Info",      12 },
   { "Confrn",    13 },
   { "Park",      14 },
   { "Join",      15 },
   { "MeetMe",    16 },
   { "PickUp",    17 },
   { "GPickUp",      18 },
};

typedef struct soft_key_template {
   int softKeyOffset;
   int softKeyCount;
   int totalSoftKeyCount;
    soft_key_template_definition softKeyTemplateDefinition[32];
} soft_key_template;

#define  SOFT_KEY_SET_RES_MESSAGE 0x0109
static const char *soft_key_set_hack = {
   "\x01\x02\x05\x03\x09\x0a\x0b\x10\x11\x12\x04\x0e\x0d\x00\x00\x00"
   "\x2d\x01\x2e\x01\x31\x01\x2f\x01\x35\x01\x36\x01\x37\x01\x3c\x01"
   "\x3d\x01\x3e\x01\x30\x01\x3a\x01\x39\x01\x00\x00\x00\x00\x00\x00"
   "\x03\x09\x04\x0e\x0d\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x2f\x01\x35\x01\x30\x01\x3a\x01\x39\x01\x3f\x01\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x0a\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x36\x01\x2e\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x0b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x37\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x01\x09\x05\x10\x11\x12\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x2d\x01\x35\x01\x31\x01\x3c\x01\x3d\x01\x3e\x01\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x09\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x35\x01\x30\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x08\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x34\x01\x35\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x09\x0d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x35\x01\x39\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x35\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x01\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x2d\x01\x35\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x15\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x41\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
};

typedef struct soft_key_set_definition {
   UINT8  softKeyTemplateIndex[16];
   UINT16 softKeyInfoIndex[16];
} soft_key_set_definition;

typedef struct soft_key_sets {
   UINT32 softKeySetOffset;
   UINT32 softKeySetCount;
   UINT32 totalSoftKeySetCount;
   soft_key_set_definition softKeySetDefinition[16];
   UINT32 res;
} soft_key_sets;

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

#define CALL_STATE_MESSAGE 0x0111
typedef struct call_state_message {
   int callState;
   int lineInstance;
   int callReference;
} call_state_message;

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

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

#define ACTIVATE_CALL_PLANE_MESSAGE 0x0116
typedef struct activate_call_plane_message {
   int lineInstance;
} activate_call_plane_message;

#define DIALLED_NUMBER_MESSAGE 0x011D
typedef struct dialled_number_message {
   char dialledNumber[24];
   int lineInstance;
   int callReference;
} dialled_number_message;

/* packet composition */
typedef struct {
   int len;
   int res;
   int e;
   union {
      speed_dial_stat_req_message speeddialreq;
      register_message reg;
      register_ack_message regack;
      register_rej_message regrej;
      capabilities_res_message caps;
      version_res_message version;
      button_template_res_message buttontemplate;
      displaytext_message displaytext;
      display_prompt_status_message displaypromptstatus;
      definetimedate_message definetimedate;
      start_tone_message starttone;
      speed_dial_stat_res_message speeddial;
      line_state_req_message line;
      line_stat_res_message linestat;
      soft_key_sets softkeysets;
      soft_key_template softkeytemplate;
      server_res_message serverres;
      set_lamp_message setlamp;
      set_ringer_message setringer;
      call_state_message callstate;
      keypad_button_message keypad;
      select_soft_keys_message selectsoftkey;
      activate_call_plane_message activatecallplane;
      stimulus_message stimulus;
      set_speaker_message setspeaker;
      call_info_message callinfo;
      start_media_transmission_message startmedia;
      stop_media_transmission_message stopmedia;
      open_recieve_channel_message openrecievechannel;
      open_recieve_channel_ack_message openrecievechannelack;
      close_recieve_channel_message closerecievechannel;
      display_notify_message displaynotify;
      dialled_number_message diallednumber;
   } data;
} skinny_req;

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

static int skinnydebug = 1;   /* XXX for now, enable debugging default */

/* 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 musicclass[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 SUB_REAL 0
#define SUB_ALT  1
#define MAX_SUBS 2

#define SKINNY_SPEAKERON 1
#define SKINNY_SPEAKEROFF 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