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Asterisk developer's documentation


sig_pri.h

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00001 #ifndef _SIG_PRI_H
00002 #define _SIG_PRI_H
00003 /*
00004  * Asterisk -- An open source telephony toolkit.
00005  *
00006  * Copyright (C) 1999 - 2009, Digium, Inc.
00007  *
00008  * Mark Spencer <markster@digium.com>
00009  *
00010  * See http://www.asterisk.org for more information about
00011  * the Asterisk project. Please do not directly contact
00012  * any of the maintainers of this project for assistance;
00013  * the project provides a web site, mailing lists and IRC
00014  * channels for your use.
00015  *
00016  * This program is free software, distributed under the terms of
00017  * the GNU General Public License Version 2. See the LICENSE file
00018  * at the top of the source tree.
00019  */
00020 
00021 /*! \file
00022  *
00023  * \brief Interface header for PRI signaling module
00024  *
00025  * \author Matthew Fredrickson <creslin@digium.com>
00026  */
00027 
00028 #include "asterisk/channel.h"
00029 #include "asterisk/frame.h"
00030 #include "asterisk/event.h"
00031 #include "asterisk/ccss.h"
00032 #include <libpri.h>
00033 #include <dahdi/user.h>
00034 
00035 #if defined(HAVE_PRI_CCSS)
00036 /*! PRI debug message flags when normal PRI debugging is turned on at the command line. */
00037 #define SIG_PRI_DEBUG_NORMAL  \
00038    (PRI_DEBUG_APDU | PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE | PRI_DEBUG_Q921_STATE \
00039    | PRI_DEBUG_CC)
00040 
00041 /*! PRI debug message flags when intense PRI debugging is turned on at the command line. */
00042 #define SIG_PRI_DEBUG_INTENSE \
00043    (PRI_DEBUG_APDU | PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE | PRI_DEBUG_Q921_STATE \
00044    | PRI_DEBUG_CC | PRI_DEBUG_Q921_RAW | PRI_DEBUG_Q921_DUMP)
00045 
00046 #else
00047 
00048 /*! PRI debug message flags when normal PRI debugging is turned on at the command line. */
00049 #define SIG_PRI_DEBUG_NORMAL  \
00050    (PRI_DEBUG_APDU | PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE | PRI_DEBUG_Q921_STATE)
00051 
00052 /*! PRI debug message flags when intense PRI debugging is turned on at the command line. */
00053 #define SIG_PRI_DEBUG_INTENSE \
00054    (PRI_DEBUG_APDU | PRI_DEBUG_Q931_DUMP | PRI_DEBUG_Q931_STATE | PRI_DEBUG_Q921_STATE \
00055    | PRI_DEBUG_Q921_RAW | PRI_DEBUG_Q921_DUMP)
00056 #endif   /* !defined(HAVE_PRI_CCSS) */
00057 
00058 #if 0
00059 /*! PRI debug message flags set on initial startup. */
00060 #define SIG_PRI_DEBUG_DEFAULT SIG_PRI_DEBUG_NORMAL
00061 #else
00062 /*! PRI debug message flags set on initial startup. */
00063 #define SIG_PRI_DEBUG_DEFAULT 0
00064 #endif
00065 
00066 #define SIG_PRI_AOC_GRANT_S    (1 << 0)
00067 #define SIG_PRI_AOC_GRANT_D    (1 << 1)
00068 #define SIG_PRI_AOC_GRANT_E    (1 << 2)
00069 
00070 enum sig_pri_tone {
00071    SIG_PRI_TONE_RINGTONE = 0,
00072    SIG_PRI_TONE_STUTTER,
00073    SIG_PRI_TONE_CONGESTION,
00074    SIG_PRI_TONE_DIALTONE,
00075    SIG_PRI_TONE_DIALRECALL,
00076    SIG_PRI_TONE_INFO,
00077    SIG_PRI_TONE_BUSY,
00078 };
00079 
00080 enum sig_pri_law {
00081    SIG_PRI_DEFLAW = 0,
00082    SIG_PRI_ULAW,
00083    SIG_PRI_ALAW
00084 };
00085 
00086 /*! Call establishment life cycle level for simple comparisons. */
00087 enum sig_pri_call_level {
00088    /*! Call does not exist. */
00089    SIG_PRI_CALL_LEVEL_IDLE,
00090    /*! Call is present but has no response yet. (SETUP) */
00091    SIG_PRI_CALL_LEVEL_SETUP,
00092    /*! Call is collecting digits for overlap dialing. (SETUP ACKNOWLEDGE) */
00093    SIG_PRI_CALL_LEVEL_OVERLAP,
00094    /*! Call routing is happening. (PROCEEDING) */
00095    SIG_PRI_CALL_LEVEL_PROCEEDING,
00096    /*! Called party is being alerted of the call. (ALERTING) */
00097    SIG_PRI_CALL_LEVEL_ALERTING,
00098    /*! Call is connected/answered. (CONNECT) */
00099    SIG_PRI_CALL_LEVEL_CONNECT,
00100 };
00101 
00102 struct sig_pri_span;
00103 
00104 struct sig_pri_callback {
00105    /* Unlock the private in the signalling private structure.  This is used for three way calling madness. */
00106    void (* const unlock_private)(void *pvt);
00107    /* Lock the private in the signalling private structure.  ... */
00108    void (* const lock_private)(void *pvt);
00109    /* Function which is called back to handle any other DTMF events that are received.  Called by analog_handle_event.  Why is this
00110     * important to use, instead of just directly using events received before they are passed into the library?  Because sometimes,
00111     * (CWCID) the library absorbs DTMF events received. */
00112    //void (* const handle_dtmf)(void *pvt, struct ast_channel *ast, enum analog_sub analog_index, struct ast_frame **dest);
00113 
00114    //int (* const dial_digits)(void *pvt, enum analog_sub sub, struct analog_dialoperation *dop);
00115    int (* const play_tone)(void *pvt, enum sig_pri_tone tone);
00116 
00117    int (* const set_echocanceller)(void *pvt, int enable);
00118    int (* const train_echocanceller)(void *pvt);
00119    int (* const dsp_reset_and_flush_digits)(void *pvt);
00120 
00121    struct ast_channel * (* const new_ast_channel)(void *pvt, int state, enum sig_pri_law law, char *exten, const struct ast_channel *chan);
00122 
00123    void (* const fixup_chans)(void *old_chan, void *new_chan);
00124 
00125    /* Note: Called with PRI lock held */
00126    void (* const handle_dchan_exception)(struct sig_pri_span *pri, int index);
00127    void (* const set_alarm)(void *pvt, int in_alarm);
00128    void (* const set_dialing)(void *pvt, int is_dialing);
00129    void (* const set_digital)(void *pvt, int is_digital);
00130    void (* const set_callerid)(void *pvt, const struct ast_party_caller *caller);
00131    void (* const set_dnid)(void *pvt, const char *dnid);
00132    void (* const set_rdnis)(void *pvt, const char *rdnis);
00133    void (* const queue_control)(void *pvt, int subclass);
00134    int (* const new_nobch_intf)(struct sig_pri_span *pri);
00135    void (* const init_config)(void *pvt, struct sig_pri_span *pri);
00136    const char *(* const get_orig_dialstring)(void *pvt);
00137    void (* const make_cc_dialstring)(void *pvt, char *buf, size_t buf_size);
00138    void (* const update_span_devstate)(struct sig_pri_span *pri);
00139 
00140    void (* const open_media)(void *pvt);
00141 
00142    /*!
00143     * \brief Post an AMI B channel association event.
00144     *
00145     * \param pvt Private structure of the user of this module.
00146     * \param chan Channel associated with the private pointer
00147     *
00148     * \return Nothing
00149     */
00150    void (* const ami_channel_event)(void *pvt, struct ast_channel *chan);
00151 
00152    /*! Reference the parent module. */
00153    void (*module_ref)(void);
00154    /*! Unreference the parent module. */
00155    void (*module_unref)(void);
00156 };
00157 
00158 #define SIG_PRI_NUM_DCHANS    4     /*!< No more than 4 d-channels */
00159 #define SIG_PRI_MAX_CHANNELS  672      /*!< No more than a DS3 per trunk group */
00160 
00161 #define SIG_PRI      DAHDI_SIG_CLEAR
00162 #define SIG_BRI      (0x2000000 | DAHDI_SIG_CLEAR)
00163 #define SIG_BRI_PTMP (0X4000000 | DAHDI_SIG_CLEAR)
00164 
00165 /* QSIG channel mapping option types */
00166 #define DAHDI_CHAN_MAPPING_PHYSICAL 0
00167 #define DAHDI_CHAN_MAPPING_LOGICAL  1
00168 
00169 /* Overlap dialing option types */
00170 #define DAHDI_OVERLAPDIAL_NONE 0
00171 #define DAHDI_OVERLAPDIAL_OUTGOING 1
00172 #define DAHDI_OVERLAPDIAL_INCOMING 2
00173 #define DAHDI_OVERLAPDIAL_BOTH (DAHDI_OVERLAPDIAL_INCOMING|DAHDI_OVERLAPDIAL_OUTGOING)
00174 
00175 #if defined(HAVE_PRI_SERVICE_MESSAGES)
00176 /*! \brief Persistent Service State */
00177 #define SRVST_DBKEY "service-state"
00178 /*! \brief The out-of-service SERVICE state */
00179 #define SRVST_TYPE_OOS "O"
00180 /*! \brief SRVST_INITIALIZED is used to indicate a channel being out-of-service
00181  *  The SRVST_INITIALIZED is mostly used maintain backwards compatibility but also may
00182  *  mean that the channel has not yet received a RESTART message.  If a channel is
00183  *  out-of-service with this reason a RESTART message will result in the channel
00184  *  being put into service. */
00185 #define SRVST_INITIALIZED 0
00186 /*! \brief SRVST_NEAREND is used to indicate that the near end was put out-of-service */
00187 #define SRVST_NEAREND  (1 << 0)
00188 /*! \brief SRVST_FAREND is used to indicate that the far end was taken out-of-service */
00189 #define SRVST_FAREND   (1 << 1)
00190 /*! \brief SRVST_BOTH is used to indicate that both sides of the channel are out-of-service */
00191 #define SRVST_BOTH (SRVST_NEAREND | SRVST_FAREND)
00192 
00193 /*! \brief The AstDB family */
00194 static const char dahdi_db[] = "dahdi/registry";
00195 #endif   /* defined(HAVE_PRI_SERVICE_MESSAGES) */
00196 
00197 struct sig_pri_chan {
00198    /* Options to be set by user */
00199    unsigned int hidecallerid:1;
00200    unsigned int hidecalleridname:1;      /*!< Hide just the name not the number for legacy PBX use */
00201    unsigned int immediate:1;        /*!< Answer before getting digits? */
00202    unsigned int priexclusive:1;        /*!< Whether or not to override and use exculsive mode for channel selection */
00203    unsigned int priindication_oob:1;
00204    unsigned int use_callerid:1;        /*!< Whether or not to use caller id on this channel */
00205    unsigned int use_callingpres:1;        /*!< Whether to use the callingpres the calling switch sends */
00206    char context[AST_MAX_CONTEXT];
00207    char mohinterpret[MAX_MUSICCLASS];
00208    int stripmsd;
00209    int channel;               /*!< Channel Number or CRV */
00210 
00211    /* Options to be checked by user */
00212    int cid_ani2;                 /*!< Automatic Number Identification number (Alternate PRI caller ID number) */
00213    int cid_ton;               /*!< Type Of Number (TON) */
00214    int callingpres;           /*!< The value of calling presentation that we're going to use when placing a PRI call */
00215    char cid_num[AST_MAX_EXTENSION];
00216    char cid_subaddr[AST_MAX_EXTENSION];
00217    char cid_name[AST_MAX_EXTENSION];
00218    char cid_ani[AST_MAX_EXTENSION];
00219    /*! \brief User tag for party id's sent from this device driver. */
00220    char user_tag[AST_MAX_EXTENSION];
00221    char exten[AST_MAX_EXTENSION];
00222 
00223    /* Internal variables -- Don't touch */
00224    /* Probably will need DS0 number, DS1 number, and a few other things */
00225    char dialdest[256];           /* Queued up digits for overlap dialing.  They will be sent out as information messages when setup ACK is received */
00226 #if defined(HAVE_PRI_SETUP_KEYPAD)
00227    /*! \brief Keypad digits that came in with the SETUP message. */
00228    char keypad_digits[AST_MAX_EXTENSION];
00229 #endif   /* defined(HAVE_PRI_SETUP_KEYPAD) */
00230 
00231 #if defined(HAVE_PRI_AOC_EVENTS)
00232    struct pri_subcmd_aoc_e aoc_e;
00233    int aoc_s_request_invoke_id;     /*!< If an AOC-S request was present for the call, this is the invoke_id to use for the response */
00234    unsigned int aoc_s_request_invoke_id_valid:1; /*!< This is set when the AOC-S invoke id is present */
00235    unsigned int waiting_for_aoce:1; /*!< Delaying hangup for AOC-E msg. If this is set and AOC-E is received, continue with hangup before timeout period. */
00236    unsigned int holding_aoce:1;     /*!< received AOC-E msg from asterisk. holding for disconnect/release */
00237 #endif   /* defined(HAVE_PRI_AOC_EVENTS) */
00238    unsigned int inalarm:1;
00239    unsigned int alreadyhungup:1; /*!< TRUE if the call has already gone/hungup */
00240    unsigned int isidlecall:1;    /*!< TRUE if this is an idle call */
00241    unsigned int progress:1;      /*!< TRUE if the call has seen inband-information progress through the network */
00242    unsigned int resetting:1;     /*!< TRUE if this channel is being reset/restarted */
00243 
00244    /*!
00245     * \brief TRUE when this channel is allocated.
00246     *
00247     * \details
00248     * Needed to hold an outgoing channel allocation before the
00249     * owner pointer is created.
00250     *
00251     * \note This is one of several items to check to see if a
00252     * channel is available for use.
00253     */
00254    unsigned int allocated:1;
00255    unsigned int outgoing:1;
00256    unsigned int digital:1;
00257    /*! \brief TRUE if this interface has no B channel.  (call hold and call waiting) */
00258    unsigned int no_b_channel:1;
00259 #if defined(HAVE_PRI_CALL_WAITING)
00260    /*! \brief TRUE if this is a call waiting call */
00261    unsigned int is_call_waiting:1;
00262 #endif   /* defined(HAVE_PRI_CALL_WAITING) */
00263 
00264    struct ast_channel *owner;
00265 
00266    struct sig_pri_span *pri;
00267    q931_call *call;           /*!< opaque libpri call control structure */
00268 
00269    /*! Call establishment life cycle level for simple comparisons. */
00270    enum sig_pri_call_level call_level;
00271    int prioffset;             /*!< channel number in span */
00272    int logicalspan;           /*!< logical span number within trunk group */
00273    int mastertrunkgroup;         /*!< what trunk group is our master */
00274 #if defined(HAVE_PRI_SERVICE_MESSAGES)
00275    /*! \brief Active SRVST_DBKEY out-of-service status value. */
00276    unsigned service_status;
00277 #endif   /* defined(HAVE_PRI_SERVICE_MESSAGES) */
00278 
00279    struct sig_pri_callback *calls;
00280    void *chan_pvt;               /*!< Private structure of the user of this module. */
00281 #if defined(HAVE_PRI_REVERSE_CHARGE)
00282    /*!
00283     * \brief Reverse charging indication
00284     * \details
00285     * -1 - No reverse charging,
00286     *  1 - Reverse charging,
00287     * 0,2-7 - Reserved for future use
00288     */
00289    int reverse_charging_indication;
00290 #endif
00291 };
00292 
00293 #if defined(HAVE_PRI_MWI)
00294 /*! Maximum number of mailboxes per span. */
00295 #define SIG_PRI_MAX_MWI_MAILBOXES         8
00296 /*! Typical maximum length of mwi mailbox number */
00297 #define SIG_PRI_MAX_MWI_MBOX_NUMBER_LEN      10 /* digits in number */
00298 /*! Typical maximum length of mwi mailbox context */
00299 #define SIG_PRI_MAX_MWI_CONTEXT_LEN       10
00300 /*!
00301  * \brief Maximum mwi_mailbox string length.
00302  * \details
00303  * max_length = #mailboxes * (mbox_number + '@' + context + ',')
00304  * The last ',' is a null terminator instead.
00305  */
00306 #define SIG_PRI_MAX_MWI_MAILBOX_STR    (SIG_PRI_MAX_MWI_MAILBOXES \
00307    * (SIG_PRI_MAX_MWI_MBOX_NUMBER_LEN + 1 + SIG_PRI_MAX_MWI_CONTEXT_LEN + 1))
00308 
00309 struct sig_pri_mbox {
00310    /*!
00311     * \brief MWI mailbox event subscription.
00312     * \note NULL if mailbox not configured.
00313     */
00314    struct ast_event_sub *sub;
00315    /*! \brief Mailbox number */
00316    const char *number;
00317    /*! \brief Mailbox context. */
00318    const char *context;
00319 };
00320 #endif   /* defined(HAVE_PRI_MWI) */
00321 
00322 struct sig_pri_span {
00323    /* Should be set by user */
00324    struct ast_cc_config_params *cc_params;         /*!< CC config parameters for each new call. */
00325    int   pritimers[PRI_MAX_TIMERS];
00326    int overlapdial;                       /*!< In overlap dialing mode */
00327    int qsigchannelmapping;                   /*!< QSIG channel mapping type */
00328    int discardremoteholdretrieval;              /*!< shall remote hold or remote retrieval notifications be discarded? */
00329    int facilityenable;                       /*!< Enable facility IEs */
00330 #if defined(HAVE_PRI_L2_PERSISTENCE)
00331    /*! Layer 2 persistence option. */
00332    int l2_persistence;
00333 #endif   /* defined(HAVE_PRI_L2_PERSISTENCE) */
00334    int dchan_logical_span[SIG_PRI_NUM_DCHANS];     /*!< Logical offset the DCHAN sits in */
00335    int fds[SIG_PRI_NUM_DCHANS];              /*!< FD's for d-channels */
00336 
00337 #if defined(HAVE_PRI_AOC_EVENTS)
00338    int aoc_passthrough_flag;                 /*!< Represents what AOC messages (S,D,E) are allowed to pass-through */
00339    unsigned int aoce_delayhangup:1;          /*!< defines whether the aoce_delayhangup option is enabled or not */
00340 #endif   /* defined(HAVE_PRI_AOC_EVENTS) */
00341 
00342 #if defined(HAVE_PRI_SERVICE_MESSAGES)
00343    unsigned int enable_service_message_support:1;  /*!< enable SERVICE message support */
00344 #endif   /* defined(HAVE_PRI_SERVICE_MESSAGES) */
00345 #ifdef HAVE_PRI_INBANDDISCONNECT
00346    unsigned int inbanddisconnect:1;          /*!< Should we support inband audio after receiving DISCONNECT? */
00347 #endif
00348 #if defined(HAVE_PRI_CALL_HOLD)
00349    /*! \brief TRUE if held calls are transferred on disconnect. */
00350    unsigned int hold_disconnect_transfer:1;
00351 #endif   /* defined(HAVE_PRI_CALL_HOLD) */
00352    /*!
00353     * \brief TRUE if call transfer is enabled for the span.
00354     * \note Support switch-side transfer (called 2BCT, RLT or other names)
00355     */
00356    unsigned int transfer:1;
00357 #if defined(HAVE_PRI_CALL_WAITING)
00358    /*! \brief TRUE if we will allow incoming ISDN call waiting calls. */
00359    unsigned int allow_call_waiting_calls:1;
00360 #endif   /* defined(HAVE_PRI_CALL_WAITING) */
00361    /*!
00362     * TRUE if a new call's sig_pri_chan.user_tag[] has the MSN
00363     * appended to the initial_user_tag[].
00364     */
00365    unsigned int append_msn_to_user_tag:1;
00366    int dialplan;                    /*!< Dialing plan */
00367    int localdialplan;                  /*!< Local dialing plan */
00368    char internationalprefix[10];       /*!< country access code ('00' for european dialplans) */
00369    char nationalprefix[10];            /*!< area access code ('0' for european dialplans) */
00370    char localprefix[20];               /*!< area access code + area code ('0'+area code for european dialplans) */
00371    char privateprefix[20];             /*!< for private dialplans */
00372    char unknownprefix[20];             /*!< for unknown dialplans */
00373    long resetinterval;                 /*!< Interval (in seconds) for resetting unused channels */
00374 #if defined(HAVE_PRI_MWI)
00375    /*! \brief Active MWI mailboxes */
00376    struct sig_pri_mbox mbox[SIG_PRI_MAX_MWI_MAILBOXES];
00377    /*!
00378     * \brief Comma separated list of mailboxes to indicate MWI.
00379     * \note Empty if disabled.
00380     * \note Format: mailbox_number[@context]{,mailbox_number[@context]}
00381     * \note String is split apart when span is started.
00382     */
00383    char mwi_mailboxes[SIG_PRI_MAX_MWI_MAILBOX_STR];
00384 #endif   /* defined(HAVE_PRI_MWI) */
00385    /*!
00386     * \brief Initial user tag for party id's sent from this device driver.
00387     * \note String set by config file.
00388     */
00389    char initial_user_tag[AST_MAX_EXTENSION];
00390    char msn_list[AST_MAX_EXTENSION];      /*!< Comma separated list of MSNs to handle.  Empty if disabled. */
00391    char idleext[AST_MAX_EXTENSION];    /*!< Where to idle extra calls */
00392    char idlecontext[AST_MAX_CONTEXT];     /*!< What context to use for idle */
00393    char idledial[AST_MAX_EXTENSION];      /*!< What to dial before dumping */
00394    int minunused;                   /*!< Min # of channels to keep empty */
00395    int minidle;                     /*!< Min # of "idling" calls to keep active */
00396    int nodetype;                    /*!< Node type */
00397    int switchtype;                     /*!< Type of switch to emulate */
00398    int nsf;                      /*!< Network-Specific Facilities */
00399    int trunkgroup;                     /*!< What our trunkgroup is */
00400 #if defined(HAVE_PRI_CCSS)
00401    int cc_ptmp_recall_mode;            /*!< CC PTMP recall mode. globalRecall(0), specificRecall(1) */
00402    int cc_qsig_signaling_link_req;        /*!< CC Q.SIG signaling link retention (Party A) release(0), retain(1), do-not-care(2) */
00403    int cc_qsig_signaling_link_rsp;        /*!< CC Q.SIG signaling link retention (Party B) release(0), retain(1) */
00404 #endif   /* defined(HAVE_PRI_CCSS) */
00405 #if defined(HAVE_PRI_CALL_WAITING)
00406    /*!
00407     * \brief Number of extra outgoing calls to allow on a span before
00408     * considering that span congested.
00409     */
00410    int max_call_waiting_calls;
00411    struct {
00412       int stripmsd;
00413       unsigned int hidecallerid:1;
00414       unsigned int hidecalleridname:1;      /*!< Hide just the name not the number for legacy PBX use */
00415       unsigned int immediate:1;        /*!< Answer before getting digits? */
00416       unsigned int priexclusive:1;        /*!< Whether or not to override and use exculsive mode for channel selection */
00417       unsigned int priindication_oob:1;
00418       unsigned int use_callerid:1;        /*!< Whether or not to use caller id on this channel */
00419       unsigned int use_callingpres:1;        /*!< Whether to use the callingpres the calling switch sends */
00420       char context[AST_MAX_CONTEXT];
00421       char mohinterpret[MAX_MUSICCLASS];
00422    } ch_cfg;
00423 
00424    /*!
00425     * \brief Number of outstanding call waiting calls.
00426     * \note Must be zero to allow new calls from asterisk to
00427     * immediately allocate a B channel.
00428     */
00429    int num_call_waiting_calls;
00430 #endif   /* defined(HAVE_PRI_CALL_WAITING) */
00431    int dchanavail[SIG_PRI_NUM_DCHANS];    /*!< Whether each channel is available */
00432    int debug;                       /*!< set to true if to dump PRI event info */
00433    int span;                        /*!< span number put into user output messages */
00434    int resetting;                   /*!< true if span is being reset/restarted */
00435    int resetpos;                    /*!< current position during a reset (-1 if not started) */
00436    int sig;                      /*!< ISDN signalling type (SIG_PRI, SIG_BRI, SIG_BRI_PTMP, etc...) */
00437    int new_chan_seq;                /*!< New struct ast_channel sequence number */
00438    /*! TRUE if we have already whined about no D channels available. */
00439    unsigned int no_d_channels:1;
00440 
00441    /* Everything after here is internally set */
00442    struct pri *dchans[SIG_PRI_NUM_DCHANS];      /*!< Actual d-channels */
00443    struct pri *pri;                    /*!< Currently active D-channel */
00444    /*!
00445     * List of private structures of the user of this module for no B channel
00446     * interfaces. (hold and call waiting interfaces)
00447     */
00448    void *no_b_chan_iflist;
00449    /*!
00450     * List of private structures of the user of this module for no B channel
00451     * interfaces. (hold and call waiting interfaces)
00452     */
00453    void *no_b_chan_end;
00454    int numchans;                       /*!< Num of channels we represent */
00455    struct sig_pri_chan *pvts[SIG_PRI_MAX_CHANNELS];/*!< Member channel pvt structs */
00456    pthread_t master;                   /*!< Thread of master */
00457    ast_mutex_t lock;                   /*!< libpri access Mutex */
00458    time_t lastreset;                   /*!< time when unused channels were last reset */
00459    struct sig_pri_callback *calls;
00460    /*!
00461     * \brief Congestion device state of the span.
00462     * \details
00463     * AST_DEVICE_NOT_INUSE - Span does not have all B channels in use.
00464     * AST_DEVICE_BUSY - All B channels are in use.
00465     * AST_DEVICE_UNAVAILABLE - Span is in alarm.
00466     * \note
00467     * Device name: \startverbatim DAHDI/I<span>/congestion. \endverbatim
00468     */
00469    int congestion_devstate;
00470 #if defined(THRESHOLD_DEVSTATE_PLACEHOLDER)
00471    /*! \todo An ISDN span threshold device state could be useful in determining how often a span utilization goes over a configurable threshold. */
00472    /*!
00473     * \brief User threshold device state of the span.
00474     * \details
00475     * AST_DEVICE_NOT_INUSE - There are no B channels in use.
00476     * AST_DEVICE_INUSE - The number of B channels in use is less than
00477     *    the configured threshold but not zero.
00478     * AST_DEVICE_BUSY - The number of B channels in use meets or exceeds
00479     *    the configured threshold.
00480     * AST_DEVICE_UNAVAILABLE - Span is in alarm.
00481     * \note
00482     * Device name:  DAHDI/I<span>/threshold
00483     */
00484    int threshold_devstate;
00485    /*!
00486     * \brief Number of B channels in use to consider the span in a busy state.
00487     * \note Setting the threshold to zero is interpreted as all B channels.
00488     */
00489    int user_busy_threshold;
00490 #endif   /* defined(THRESHOLD_DEVSTATE_PLACEHOLDER) */
00491 };
00492 
00493 void sig_pri_extract_called_num_subaddr(struct sig_pri_chan *p, const char *rdest, char *called, size_t called_buff_size);
00494 int sig_pri_call(struct sig_pri_chan *p, struct ast_channel *ast, char *rdest, int timeout, int layer1);
00495 
00496 int sig_pri_hangup(struct sig_pri_chan *p, struct ast_channel *ast);
00497 
00498 int sig_pri_indicate(struct sig_pri_chan *p, struct ast_channel *chan, int condition, const void *data, size_t datalen);
00499 
00500 int sig_pri_answer(struct sig_pri_chan *p, struct ast_channel *ast);
00501 
00502 int sig_pri_is_chan_available(struct sig_pri_chan *pvt);
00503 int sig_pri_available(struct sig_pri_chan **pvt, int is_specific_channel);
00504 
00505 void sig_pri_init_pri(struct sig_pri_span *pri);
00506 
00507 /* If return 0, it means this function was able to handle it (pre setup digits).  If non zero, the user of this
00508  * functions should handle it normally (generate inband DTMF) */
00509 int sig_pri_digit_begin(struct sig_pri_chan *pvt, struct ast_channel *ast, char digit);
00510 
00511 void sig_pri_stop_pri(struct sig_pri_span *pri);
00512 int sig_pri_start_pri(struct sig_pri_span *pri);
00513 
00514 void sig_pri_set_alarm(struct sig_pri_chan *p, int in_alarm);
00515 void sig_pri_chan_alarm_notify(struct sig_pri_chan *p, int noalarm);
00516 
00517 void pri_event_alarm(struct sig_pri_span *pri, int index, int before_start_pri);
00518 
00519 void pri_event_noalarm(struct sig_pri_span *pri, int index, int before_start_pri);
00520 
00521 struct ast_channel *sig_pri_request(struct sig_pri_chan *p, enum sig_pri_law law, const struct ast_channel *requestor, int transfercapability);
00522 
00523 struct sig_pri_chan *sig_pri_chan_new(void *pvt_data, struct sig_pri_callback *callback, struct sig_pri_span *pri, int logicalspan, int channo, int trunkgroup);
00524 void sig_pri_chan_delete(struct sig_pri_chan *doomed);
00525 
00526 int pri_is_up(struct sig_pri_span *pri);
00527 
00528 void sig_pri_cli_show_channels_header(int fd);
00529 void sig_pri_cli_show_channels(int fd, struct sig_pri_span *pri);
00530 void sig_pri_cli_show_spans(int fd, int span, struct sig_pri_span *pri);
00531 
00532 void sig_pri_cli_show_span(int fd, int *dchannels, struct sig_pri_span *pri);
00533 
00534 int pri_send_keypad_facility_exec(struct sig_pri_chan *p, const char *digits);
00535 int pri_send_callrerouting_facility_exec(struct sig_pri_chan *p, enum ast_channel_state chanstate, const char *destination, const char *original, const char *reason);
00536 
00537 #if defined(HAVE_PRI_SERVICE_MESSAGES)
00538 int pri_maintenance_bservice(struct pri *pri, struct sig_pri_chan *p, int changestatus);
00539 #endif   /* defined(HAVE_PRI_SERVICE_MESSAGES) */
00540 
00541 void sig_pri_fixup(struct ast_channel *oldchan, struct ast_channel *newchan, struct sig_pri_chan *pchan);
00542 
00543 int sig_pri_cc_agent_init(struct ast_cc_agent *agent, struct sig_pri_chan *pvt_chan);
00544 int sig_pri_cc_agent_start_offer_timer(struct ast_cc_agent *agent);
00545 int sig_pri_cc_agent_stop_offer_timer(struct ast_cc_agent *agent);
00546 void sig_pri_cc_agent_req_rsp(struct ast_cc_agent *agent, enum ast_cc_agent_response_reason reason);
00547 int sig_pri_cc_agent_status_req(struct ast_cc_agent *agent);
00548 int sig_pri_cc_agent_stop_ringing(struct ast_cc_agent *agent);
00549 int sig_pri_cc_agent_party_b_free(struct ast_cc_agent *agent);
00550 int sig_pri_cc_agent_start_monitoring(struct ast_cc_agent *agent);
00551 int sig_pri_cc_agent_callee_available(struct ast_cc_agent *agent);
00552 void sig_pri_cc_agent_destructor(struct ast_cc_agent *agent);
00553 
00554 int sig_pri_cc_monitor_req_cc(struct ast_cc_monitor *monitor, int *available_timer_id);
00555 int sig_pri_cc_monitor_suspend(struct ast_cc_monitor *monitor);
00556 int sig_pri_cc_monitor_unsuspend(struct ast_cc_monitor *monitor);
00557 int sig_pri_cc_monitor_status_rsp(struct ast_cc_monitor *monitor, enum ast_device_state devstate);
00558 int sig_pri_cc_monitor_cancel_available_timer(struct ast_cc_monitor *monitor, int *sched_id);
00559 void sig_pri_cc_monitor_destructor(void *monitor_pvt);
00560 
00561 int sig_pri_load(const char *cc_type_name);
00562 void sig_pri_unload(void);
00563 
00564 #endif /* _SIG_PRI_H */

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