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features.h File Reference

Call Parking and Pickup API Includes code and algorithms from the Zapata library. More...

Go to the source code of this file.

Data Structures

struct  ast_call_feature
 main call feature structure More...

Defines

#define FEATURE_APP_ARGS_LEN   256
#define FEATURE_APP_LEN   64
#define FEATURE_EXTEN_LEN   32
#define FEATURE_MAX_LEN   11
#define FEATURE_SNAME_LEN   32

Functions

int ast_bridge_call (struct ast_channel *chan, struct ast_channel *peer, struct ast_bridge_config *config)
 Bridge a call, optionally allowing redirection.
int ast_masq_park_call (struct ast_channel *rchan, struct ast_channel *host, int timeout, int *extout)
 Park a call via a masqueraded channel.
int ast_park_call (struct ast_channel *chan, struct ast_channel *host, int timeout, int *extout)
 Park a call and read back parked location.
char * ast_parking_ext (void)
 Determine system parking extension Returns the call parking extension for drivers that provide special call parking help.
int ast_pickup_call (struct ast_channel *chan)
 Pickup a call.
char * ast_pickup_ext (void)
 Determine system call pickup extension.
void ast_register_feature (struct ast_call_feature *feature)
 register new feature into feature_set
void ast_unregister_feature (struct ast_call_feature *feature)
 unregister feature from feature_set


Detailed Description

Call Parking and Pickup API Includes code and algorithms from the Zapata library.

Definition in file features.h.


Define Documentation

#define FEATURE_APP_ARGS_LEN   256
 

Definition at line 29 of file features.h.

Referenced by load_config().

#define FEATURE_APP_LEN   64
 

Definition at line 28 of file features.h.

Referenced by load_config().

#define FEATURE_EXTEN_LEN   32
 

Definition at line 31 of file features.h.

Referenced by load_config().

#define FEATURE_MAX_LEN   11
 

Definition at line 27 of file features.h.

Referenced by ast_bridge_call().

#define FEATURE_SNAME_LEN   32
 

Definition at line 30 of file features.h.

Referenced by load_config().


Function Documentation

int ast_bridge_call struct ast_channel chan,
struct ast_channel peer,
struct ast_bridge_config config
 

Bridge a call, optionally allowing redirection.

Definition at line 1251 of file res_features.c.

References ast_channel::appl, ast_answer(), ast_cdr_appenduserfield(), ast_cdr_setuserfield(), ast_channel_bridge(), ast_channel_setoption(), ast_clear_flag, AST_CONTROL_FLASH, AST_CONTROL_RINGING, ast_dtmf_stream(), ast_feature_interpret(), AST_FEATURE_PLAY_WARNING, ast_frfree(), ast_indicate(), ast_log(), ast_strlen_zero(), ast_channel::cdr, ast_channel::data, ast_frame::data, ast_option_header::data, ast_frame::datalen, ast_bridge_config::end_sound, FEATURE_MAX_LEN, FEATURE_RETURN_PASSDIGITS, FEATURE_RETURN_SUCCESS, ast_bridge_config::feature_timer, ast_bridge_config::features_callee, ast_bridge_config::features_caller, ast_bridge_config::firstpass, ast_option_header::flag, ast_frame::frametype, free, LOG_DEBUG, LOG_WARNING, monitor_app, monitor_ok, ast_channel::name, ast_option_header::option, pbx_builtin_getvar_helper(), pbx_builtin_setvar_helper(), pbx_exec(), pbx_findapp(), ast_bridge_config::play_warning, set_config_flags(), ast_bridge_config::start_sound, ast_bridge_config::start_time, ast_frame::subclass, ast_cdr::userfield, ast_bridge_config::warning_freq, and ast_bridge_config::warning_sound.

Referenced by ast_bridge_call_thread(), builtin_atxfer(), dial_exec_full(), park_exec(), and try_calling().

01252 {
01253    /* Copy voice back and forth between the two channels.  Give the peer
01254       the ability to transfer calls with '#<extension' syntax. */
01255    struct ast_frame *f;
01256    struct ast_channel *who;
01257    char chan_featurecode[FEATURE_MAX_LEN + 1]="";
01258    char peer_featurecode[FEATURE_MAX_LEN + 1]="";
01259    int res;
01260    int diff;
01261    int hasfeatures=0;
01262    int hadfeatures=0;
01263    struct ast_option_header *aoh;
01264    struct timeval start = { 0 , 0 };
01265    struct ast_bridge_config backup_config;
01266    char *monitor_exec;
01267 
01268    memset(&backup_config, 0, sizeof(backup_config));
01269 
01270    config->start_time = ast_tvnow();
01271 
01272    if (chan && peer) {
01273       pbx_builtin_setvar_helper(chan, "BRIDGEPEER", peer->name);
01274       pbx_builtin_setvar_helper(peer, "BRIDGEPEER", chan->name);
01275    } else if (chan)
01276       pbx_builtin_setvar_helper(chan, "BLINDTRANSFER", NULL);
01277 
01278    if (monitor_ok) {
01279       if (!monitor_app) { 
01280          if (!(monitor_app = pbx_findapp("Monitor")))
01281             monitor_ok=0;
01282       }
01283       if (monitor_app) {
01284          if ((monitor_exec = pbx_builtin_getvar_helper(chan, "AUTO_MONITOR"))) 
01285             pbx_exec(chan, monitor_app, monitor_exec, 1);
01286          else if ((monitor_exec = pbx_builtin_getvar_helper(peer, "AUTO_MONITOR")))
01287             pbx_exec(peer, monitor_app, monitor_exec, 1);
01288       }
01289    }
01290    
01291    set_config_flags(chan, peer, config);
01292    config->firstpass = 1;
01293 
01294    /* Answer if need be */
01295    if (ast_answer(chan))
01296       return -1;
01297    peer->appl = "Bridged Call";
01298    peer->data = chan->name;
01299 
01300    /* copy the userfield from the B-leg to A-leg if applicable */
01301    if (chan->cdr && peer->cdr && !ast_strlen_zero(peer->cdr->userfield)) {
01302       char tmp[256];
01303       if (!ast_strlen_zero(chan->cdr->userfield)) {
01304          snprintf(tmp, sizeof(tmp), "%s;%s", chan->cdr->userfield, peer->cdr->userfield);
01305          ast_cdr_appenduserfield(chan, tmp);
01306       } else
01307          ast_cdr_setuserfield(chan, peer->cdr->userfield);
01308       /* free the peer's cdr without ast_cdr_free complaining */
01309       free(peer->cdr);
01310       peer->cdr = NULL;
01311    }
01312    for (;;) {
01313       if (config->feature_timer)
01314          start = ast_tvnow();
01315 
01316       res = ast_channel_bridge(chan, peer, config, &f, &who);
01317 
01318       if (config->feature_timer) {
01319          /* Update time limit for next pass */
01320          diff = ast_tvdiff_ms(ast_tvnow(), start);
01321          config->feature_timer -= diff;
01322          if (hasfeatures) {
01323             /* Running on backup config, meaning a feature might be being
01324                activated, but that's no excuse to keep things going 
01325                indefinitely! */
01326             if (backup_config.feature_timer && ((backup_config.feature_timer -= diff) <= 0)) {
01327                ast_log(LOG_DEBUG, "Timed out, realtime this time!\n");
01328                config->feature_timer = 0;
01329                who = chan;
01330                if (f)
01331                   ast_frfree(f);
01332                f = NULL;
01333                res = 0;
01334             } else if (config->feature_timer <= 0) {
01335                /* Not *really* out of time, just out of time for
01336                   digits to come in for features. */
01337                ast_log(LOG_DEBUG, "Timed out for feature!\n");
01338                if (!ast_strlen_zero(peer_featurecode)) {
01339                   ast_dtmf_stream(chan, peer, peer_featurecode, 0);
01340                   memset(peer_featurecode, 0, sizeof(peer_featurecode));
01341                }
01342                if (!ast_strlen_zero(chan_featurecode)) {
01343                   ast_dtmf_stream(peer, chan, chan_featurecode, 0);
01344                   memset(chan_featurecode, 0, sizeof(chan_featurecode));
01345                }
01346                if (f)
01347                   ast_frfree(f);
01348                hasfeatures = !ast_strlen_zero(chan_featurecode) || !ast_strlen_zero(peer_featurecode);
01349                if (!hasfeatures) {
01350                   /* Restore original (possibly time modified) bridge config */
01351                   memcpy(config, &backup_config, sizeof(struct ast_bridge_config));
01352                   memset(&backup_config, 0, sizeof(backup_config));
01353                }
01354                hadfeatures = hasfeatures;
01355                /* Continue as we were */
01356                continue;
01357             }
01358          } else {
01359             if (config->feature_timer <=0) {
01360                /* We ran out of time */
01361                config->feature_timer = 0;
01362                who = chan;
01363                if (f)
01364                   ast_frfree(f);
01365                f = NULL;
01366                res = 0;
01367             }
01368          }
01369       }
01370       if (res < 0) {
01371          ast_log(LOG_WARNING, "Bridge failed on channels %s and %s\n", chan->name, peer->name);
01372          return -1;
01373       }
01374       
01375       if (!f || ((f->frametype == AST_FRAME_CONTROL) && ((f->subclass == AST_CONTROL_HANGUP) || (f->subclass == AST_CONTROL_BUSY) || 
01376          (f->subclass == AST_CONTROL_CONGESTION)))) {
01377             res = -1;
01378             break;
01379       }
01380       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RINGING)) {
01381          if (who == chan)
01382             ast_indicate(peer, AST_CONTROL_RINGING);
01383          else
01384             ast_indicate(chan, AST_CONTROL_RINGING);
01385       }
01386       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == -1)) {
01387          if (who == chan)
01388             ast_indicate(peer, -1);
01389          else
01390             ast_indicate(chan, -1);
01391       }
01392       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_FLASH)) {
01393          if (who == chan)
01394             ast_indicate(peer, AST_CONTROL_FLASH);
01395          else
01396             ast_indicate(chan, AST_CONTROL_FLASH);
01397       }
01398       if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_OPTION)) {
01399          aoh = f->data;
01400          /* Forward option Requests */
01401          if (aoh && (aoh->flag == AST_OPTION_FLAG_REQUEST)) {
01402             if (who == chan)
01403                ast_channel_setoption(peer, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
01404             else
01405                ast_channel_setoption(chan, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
01406          }
01407       }
01408       /* check for '*', if we find it it's time to disconnect */
01409       if (f && (f->frametype == AST_FRAME_DTMF)) {
01410          char *featurecode;
01411          int sense;
01412          struct ast_channel *other;
01413 
01414          hadfeatures = hasfeatures;
01415          /* This cannot overrun because the longest feature is one shorter than our buffer */
01416          if (who == chan) {
01417             other = peer;
01418             sense = FEATURE_SENSE_CHAN;
01419             featurecode = chan_featurecode;
01420          } else  {
01421             other = chan;
01422             sense = FEATURE_SENSE_PEER;
01423             featurecode = peer_featurecode;
01424          }
01425          featurecode[strlen(featurecode)] = f->subclass;
01426          config->feature_timer = backup_config.feature_timer;
01427          res = ast_feature_interpret(chan, peer, config, featurecode, sense);
01428          switch(res) {
01429          case FEATURE_RETURN_PASSDIGITS:
01430             ast_dtmf_stream(other, who, featurecode, 0);
01431             /* Fall through */
01432          case FEATURE_RETURN_SUCCESS:
01433             memset(featurecode, 0, sizeof(chan_featurecode));
01434             break;
01435          }
01436          if (res >= FEATURE_RETURN_PASSDIGITS) {
01437             res = 0;
01438          } else {
01439             ast_frfree(f);
01440             break;
01441          }
01442          hasfeatures = !ast_strlen_zero(chan_featurecode) || !ast_strlen_zero(peer_featurecode);
01443          if (hadfeatures && !hasfeatures) {
01444             /* Restore backup */
01445             memcpy(config, &backup_config, sizeof(struct ast_bridge_config));
01446             memset(&backup_config, 0, sizeof(struct ast_bridge_config));
01447          } else if (hasfeatures) {
01448             if (!hadfeatures) {
01449                /* Backup configuration */
01450                memcpy(&backup_config, config, sizeof(struct ast_bridge_config));
01451                /* Setup temporary config options */
01452                config->play_warning = 0;
01453                ast_clear_flag(&(config->features_caller), AST_FEATURE_PLAY_WARNING);
01454                ast_clear_flag(&(config->features_callee), AST_FEATURE_PLAY_WARNING);
01455                config->warning_freq = 0;
01456                config->warning_sound = NULL;
01457                config->end_sound = NULL;
01458                config->start_sound = NULL;
01459                config->firstpass = 0;
01460             }
01461             config->feature_timer = featuredigittimeout;
01462             ast_log(LOG_DEBUG, "Set time limit to %ld\n", config->feature_timer);
01463          }
01464       }
01465       if (f)
01466          ast_frfree(f);
01467    }
01468    return res;
01469 }

int ast_masq_park_call struct ast_channel rchan,
struct ast_channel host,
int  timeout,
int *  extout
 

Park a call via a masqueraded channel.

Parameters:
rchan the real channel to be parked
host the channel to have the parking read to Masquerade the channel rchan into a new, empty channel which is then parked with ast_park_call
timeout is a timeout in milliseconds
extout is a parameter to an int that will hold the parked location, or NULL if you want

Definition at line 401 of file res_features.c.

References ast_channel_alloc(), ast_channel_masquerade(), ast_frfree(), ast_log(), ast_park_call(), ast_read(), ast_channel::context, ast_channel::exten, LOG_WARNING, ast_channel::name, ast_channel::priority, ast_channel::readformat, and ast_channel::writeformat.

Referenced by mgcp_ss(), parkandannounce_exec(), rpt_exec(), skinny_ss(), and ss_thread().

00402 {
00403    struct ast_channel *chan;
00404    struct ast_frame *f;
00405 
00406    /* Make a new, fake channel that we'll use to masquerade in the real one */
00407    chan = ast_channel_alloc(0);
00408    if (chan) {
00409       /* Let us keep track of the channel name */
00410       snprintf(chan->name, sizeof (chan->name), "Parked/%s",rchan->name);
00411 
00412       /* Make formats okay */
00413       chan->readformat = rchan->readformat;
00414       chan->writeformat = rchan->writeformat;
00415       ast_channel_masquerade(chan, rchan);
00416 
00417       /* Setup the extensions and such */
00418       ast_copy_string(chan->context, rchan->context, sizeof(chan->context));
00419       ast_copy_string(chan->exten, rchan->exten, sizeof(chan->exten));
00420       chan->priority = rchan->priority;
00421 
00422       /* Make the masq execute */
00423       f = ast_read(chan);
00424       if (f)
00425          ast_frfree(f);
00426       ast_park_call(chan, peer, timeout, extout);
00427    } else {
00428       ast_log(LOG_WARNING, "Unable to create parked channel\n");
00429       return -1;
00430    }
00431    return 0;
00432 }

int ast_park_call struct ast_channel chan,
struct ast_channel host,
int  timeout,
int *  extout
 

Park a call and read back parked location.

Parameters:
chan the channel to actually be parked
host the channel which will have the parked location read to Park the channel chan, and read back the parked location to the host. If the call is not picked up within a specified period of time, then the call will return to the last step that it was in (in terms of exten, priority and context)
timeout is a timeout in milliseconds
extout is a parameter to an int that will hold the parked location, or NULL if you want

Definition at line 278 of file res_features.c.

References adsi_announce_park(), adsi_available(), adsi_unload_session(), adsipark, ast_channel::appl, ast_add_extension2(), ast_context_create(), ast_context_find(), AST_CONTROL_HOLD, ast_indicate(), ast_log(), ast_moh_start(), ast_mutex_lock(), ast_mutex_unlock(), ast_say_digits(), ast_strlen_zero(), ast_verbose(), parkeduser::chan, ast_channel::cid, ast_callerid::cid_name, ast_callerid::cid_num, parkeduser::context, ast_channel::context, ast_channel::data, EVENT_FLAG_CALL, parkeduser::exten, ast_channel::exten, free, FREE, ast_channel::language, LOG_ERROR, LOG_WARNING, ast_channel::macrocontext, ast_channel::macroexten, ast_channel::macropriority, malloc, manager_event(), ast_channel::name, parkeduser::next, parkeduser::notquiteyet, option_verbose, parkedcall, parking_con, parking_offset, parking_start, parking_stop, parking_thread, parkinglot, parkeduser::parkingnum, parkeduser::parkingtime, parkeduser::peername, parkeduser::priority, ast_channel::priority, registrar, parkeduser::start, strdup, and VERBOSE_PREFIX_2.

Referenced by ast_masq_park_call(), builtin_blindtransfer(), iax_park_thread(), park_call_exec(), and sip_park_thread().

00279 {
00280    struct parkeduser *pu, *cur;
00281    int i,x,parking_range;
00282    char exten[AST_MAX_EXTENSION];
00283    struct ast_context *con;
00284 
00285    pu = malloc(sizeof(struct parkeduser));
00286    if (!pu) {
00287       ast_log(LOG_WARNING, "Out of memory\n");
00288       return -1;
00289    }
00290    memset(pu, 0, sizeof(struct parkeduser));
00291    ast_mutex_lock(&parking_lock);
00292    parking_range = parking_stop - parking_start+1;
00293    for (i = 0; i < parking_range; i++) {
00294       x = (i + parking_offset) % parking_range + parking_start;
00295       cur = parkinglot;
00296       while(cur) {
00297          if (cur->parkingnum == x) 
00298             break;
00299          cur = cur->next;
00300       }
00301       if (!cur)
00302          break;
00303    }
00304 
00305    if (!(i < parking_range)) {
00306       ast_log(LOG_WARNING, "No more parking spaces\n");
00307       free(pu);
00308       ast_mutex_unlock(&parking_lock);
00309       return -1;
00310    }
00311    if (parkfindnext) 
00312       parking_offset = x - parking_start + 1;
00313    chan->appl = "Parked Call";
00314    chan->data = NULL; 
00315 
00316    pu->chan = chan;
00317    /* Start music on hold */
00318    if (chan != peer) {
00319       ast_indicate(pu->chan, AST_CONTROL_HOLD);
00320       ast_moh_start(pu->chan, NULL);
00321    }
00322    pu->start = ast_tvnow();
00323    pu->parkingnum = x;
00324    if (timeout > 0)
00325       pu->parkingtime = timeout;
00326    else
00327       pu->parkingtime = parkingtime;
00328    if (extout)
00329       *extout = x;
00330    if (peer) 
00331       ast_copy_string(pu->peername, peer->name, sizeof(pu->peername));
00332 
00333    /* Remember what had been dialed, so that if the parking
00334       expires, we try to come back to the same place */
00335    if (!ast_strlen_zero(chan->macrocontext))
00336       ast_copy_string(pu->context, chan->macrocontext, sizeof(pu->context));
00337    else
00338       ast_copy_string(pu->context, chan->context, sizeof(pu->context));
00339    if (!ast_strlen_zero(chan->macroexten))
00340       ast_copy_string(pu->exten, chan->macroexten, sizeof(pu->exten));
00341    else
00342       ast_copy_string(pu->exten, chan->exten, sizeof(pu->exten));
00343    if (chan->macropriority)
00344       pu->priority = chan->macropriority;
00345    else
00346       pu->priority = chan->priority;
00347    pu->next = parkinglot;
00348    parkinglot = pu;
00349    /* If parking a channel directly, don't quiet yet get parking running on it */
00350    if (peer == chan) 
00351       pu->notquiteyet = 1;
00352    ast_mutex_unlock(&parking_lock);
00353    /* Wake up the (presumably select()ing) thread */
00354    pthread_kill(parking_thread, SIGURG);
00355    if (option_verbose > 1) 
00356       ast_verbose(VERBOSE_PREFIX_2 "Parked %s on %d. Will timeout back to extension [%s] %s, %d in %d seconds\n", pu->chan->name, pu->parkingnum, pu->context, pu->exten, pu->priority, (pu->parkingtime/1000));
00357 
00358    manager_event(EVENT_FLAG_CALL, "ParkedCall",
00359       "Exten: %d\r\n"
00360       "Channel: %s\r\n"
00361       "From: %s\r\n"
00362       "Timeout: %ld\r\n"
00363       "CallerID: %s\r\n"
00364       "CallerIDName: %s\r\n"
00365       ,pu->parkingnum, pu->chan->name, peer->name
00366       ,(long)pu->start.tv_sec + (long)(pu->parkingtime/1000) - (long)time(NULL)
00367       ,(pu->chan->cid.cid_num ? pu->chan->cid.cid_num : "<unknown>")
00368       ,(pu->chan->cid.cid_name ? pu->chan->cid.cid_name : "<unknown>")
00369       );
00370 
00371    if (peer) {
00372       if (adsipark && adsi_available(peer)) {
00373          adsi_announce_park(peer, pu->parkingnum);
00374       }
00375       if (adsipark && adsi_available(peer)) {
00376          adsi_unload_session(peer);
00377       }
00378    }
00379    con = ast_context_find(parking_con);
00380    if (!con) {
00381       con = ast_context_create(NULL, parking_con, registrar);
00382       if (!con) {
00383          ast_log(LOG_ERROR, "Parking context '%s' does not exist and unable to create\n", parking_con);
00384       }
00385    }
00386    if (con) {
00387       snprintf(exten, sizeof(exten), "%d", x);
00388       ast_add_extension2(con, 1, exten, 1, NULL, NULL, parkedcall, strdup(exten), FREE, registrar);
00389    }
00390    if (peer) 
00391       ast_say_digits(peer, pu->parkingnum, "", peer->language);
00392    if (pu->notquiteyet) {
00393       /* Wake up parking thread if we're really done */
00394       ast_moh_start(pu->chan, NULL);
00395       pu->notquiteyet = 0;
00396       pthread_kill(parking_thread, SIGURG);
00397    }
00398    return 0;
00399 }

char* ast_parking_ext void   ) 
 

Determine system parking extension Returns the call parking extension for drivers that provide special call parking help.

Definition at line 163 of file res_features.c.

Referenced by builtin_blindtransfer(), dp_lookup(), get_refer_info(), handle_request_refer(), load_config(), mgcp_ss(), skinny_ss(), socket_read(), and ss_thread().

00164 {
00165    return parking_ext;
00166 }

int ast_pickup_call struct ast_channel chan  ) 
 

Pickup a call.

Definition at line 1915 of file res_features.c.

References ast_channel::_state, ast_answer(), ast_channel_masquerade(), ast_channel_walk_locked(), AST_CONTROL_ANSWER, ast_log(), ast_mutex_unlock(), ast_queue_control(), ast_channel::callgroup, ast_channel::lock, LOG_DEBUG, LOG_WARNING, ast_channel::name, ast_channel::pbx, and ast_channel::pickupgroup.

Referenced by cb_events(), handle_request_invite(), mgcp_ss(), monitor_handle_notowned(), skinny_ss(), and ss_thread().

01916 {
01917    struct ast_channel *cur = NULL;
01918    int res = -1;
01919 
01920    while ( (cur = ast_channel_walk_locked(cur)) != NULL) {
01921       if (!cur->pbx && 
01922          (cur != chan) &&
01923          (chan->pickupgroup & cur->callgroup) &&
01924          ((cur->_state == AST_STATE_RINGING) ||
01925           (cur->_state == AST_STATE_RING))) {
01926             break;
01927       }
01928       ast_mutex_unlock(&cur->lock);
01929    }
01930    if (cur) {
01931       if (option_debug)
01932          ast_log(LOG_DEBUG, "Call pickup on chan '%s' by '%s'\n",cur->name, chan->name);
01933       res = ast_answer(chan);
01934       if (res)
01935          ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
01936       res = ast_queue_control(chan, AST_CONTROL_ANSWER);
01937       if (res)
01938          ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan->name);
01939       res = ast_channel_masquerade(cur, chan);
01940       if (res)
01941          ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, cur->name);     /* Done */
01942       ast_mutex_unlock(&cur->lock);
01943    } else   {
01944       if (option_debug)
01945          ast_log(LOG_DEBUG, "No call pickup possible...\n");
01946    }
01947    return res;
01948 }

char* ast_pickup_ext void   ) 
 

Determine system call pickup extension.

Definition at line 168 of file res_features.c.

Referenced by cb_events(), get_destination(), handle_request_invite(), handle_showfeatures(), mgcp_ss(), monitor_handle_notowned(), skinny_ss(), and ss_thread().

00169 {
00170    return pickup_ext;
00171 }

void ast_register_feature struct ast_call_feature feature  ) 
 

register new feature into feature_set

Parameters:
feature an ast_call_feature object which contains a keysequence and a callback function which is called when this keysequence is pressed during a call.

Referenced by load_config().

void ast_unregister_feature struct ast_call_feature feature  ) 
 

unregister feature from feature_set

Parameters:
feature the ast_call_feature object which was registered before

Definition at line 888 of file res_features.c.

References AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_UNLOCK, and free.

00889 {
00890    if (!feature) return;
00891 
00892    AST_LIST_LOCK(&feature_list);
00893    AST_LIST_REMOVE(&feature_list,feature,feature_entry);
00894    AST_LIST_UNLOCK(&feature_list);
00895    free(feature);
00896 }


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