diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 51edd54edb90dd41e8ed5d19cef9e2666f35fab1..4a9bf980f086966dda9a18a01783e4e26f62df53 100755
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -187,6 +187,7 @@ static int minunused = 2;
static int minidle = 0;
static char idleext[AST_MAX_EXTENSION];
static char idledial[AST_MAX_EXTENSION];
+static int overlapdial = 0;
#endif
/* Wait up to 16 seconds for first digit (FXO logic) */
@@ -270,6 +271,7 @@ struct zt_pri {
int dialplan; /* Dialing plan */
int dchannel; /* What channel the dchannel is on */
int channels; /* Num of chans in span (31 or 24) */
+ int overlapdial; /* In overlap dialing mode */
struct pri *pri;
int debug;
int fd;
@@ -437,6 +439,7 @@ static struct zt_pvt {
#ifdef PRI_EVENT_PROCEEDING
int proceeding;
#endif
+ int setup_ack; /* wheter we received SETUP_ACKNOWLEDGE or not */
#endif
#ifdef ZAPATA_R2
int r2prot;
@@ -667,12 +670,20 @@ static int zt_digit(struct ast_channel *ast, char digit)
index = zt_get_index(ast, p, 0);
if (index == SUB_REAL) {
#ifdef ZAPATA_PRI
+#ifdef PRI_EVENT_SETUP_ACK
+ if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING && p->setup_ack && !p->proceeding) {
+#else
#ifdef PRI_EVENT_PROCEEDING
if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING && !p->proceeding) {
#else
if (p->sig == SIG_PRI && ast->_state == AST_STATE_DIALING) {
#endif
- pri_information(p->pri->pri,p->call,digit);
+#endif
+ if (!pri_grab(p, p->pri))
+ pri_information(p->pri->pri,p->call,digit);
+ else
+ ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
+ pri_rel(p->pri);
} else {
#else
{
@@ -907,6 +918,12 @@ static void zt_enable_ec(struct zt_pvt *p)
return;
}
if (p && p->echocancel) {
+ if (p->sig == SIG_PRI) {
+ x = 1;
+ res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &x);
+ if (res)
+ ast_log(LOG_WARNING, "Unable to enable echo cancellation on channel %d\n", p->channel);
+ }
x = p->echocancel;
res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOCANCEL, &x);
if (res)
@@ -995,8 +1012,14 @@ static inline int zt_set_hook(int fd, int hs)
static inline int zt_confmute(struct zt_pvt *p, int muted)
{
- int x, res;
+ int x, y, res;
x = muted;
+ if (p->sig == SIG_PRI) {
+ y = 1;
+ res = ioctl(p->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &y);
+ if (res)
+ ast_log(LOG_WARNING, "Unable to set audio mode on '%d'\n", p->channel);
+ }
res = ioctl(p->subs[SUB_REAL].zfd, ZT_CONFMUTE, &x);
if (res < 0)
ast_log(LOG_WARNING, "zt confmute(%d) failed on channel %d: %s\n", muted, p->channel, strerror(errno));
@@ -1344,7 +1367,7 @@ static int zt_call(struct ast_channel *ast, char *rdest, int timeout)
c++;
else
c = dest;
- if (ast->callerid) {
+ if (ast->callerid && !p->hidecallerid) {
strncpy(callerid, ast->callerid, sizeof(callerid)-1);
ast_callerid_parse(callerid, &n, &l);
if (l) {
@@ -1455,17 +1478,17 @@ static int zt_hangup(struct ast_channel *ast)
index = zt_get_index(ast, p, 1);
if (p->sig == SIG_PRI) {
- x = 0;
+ x = 1;
ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
}
+ x = 0;
+ zt_confmute(p, 0);
restore_gains(p);
if (p->dsp)
ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);
- x = 0;
- zt_confmute(p, 0);
ast_log(LOG_DEBUG, "Hangup: channel: %d index = %d, normal = %d, callwait = %d, thirdcall = %d\n",
p->channel, index, p->subs[SUB_REAL].zfd, p->subs[SUB_CALLWAIT].zfd, p->subs[SUB_THREEWAY].zfd);
@@ -1573,11 +1596,15 @@ static int zt_hangup(struct ast_channel *ast)
p->onhooktime = time(NULL);
#ifdef PRI_EVENT_PROCEEDING
p->proceeding = 0;
+#endif
+#ifdef PRI_EVENT_SETUP_ACK
+ p->setup_ack = 0;
#endif
if (p->dsp) {
ast_dsp_free(p->dsp);
p->dsp = NULL;
}
+
law = ZT_LAW_DEFAULT;
res = ioctl(p->subs[SUB_REAL].zfd, ZT_SETLAW, &law);
if (res < 0)
@@ -1587,8 +1614,10 @@ static int zt_hangup(struct ast_channel *ast)
if (p->sig == SIG_PRI) {
if (p->call) {
if (!pri_grab(p, p->pri)) {
- res = pri_disconnect(p->pri->pri, p->call, PRI_CAUSE_NORMAL_CLEARING);
- if (p->alreadyhungup) {
+ if (!p->alreadyhungup) {
+ res = pri_disconnect(p->pri->pri, p->call, PRI_CAUSE_NORMAL_CLEARING);
+ } else {
+ pri_release(p->pri->pri, p->call, -1);
p->call = NULL;
p->alreadyhungup = 0;
}
@@ -1654,6 +1683,12 @@ static int zt_hangup(struct ast_channel *ast)
p->dialing = 0;
strcpy(p->rdnis, "");
update_conf(p);
+ /* Restore data mode */
+ if (p->sig == SIG_PRI) {
+ x = 0;
+ ast_channel_setoption(ast,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
+ }
+
restart_monitor();
}
@@ -1844,7 +1879,7 @@ int x;
FD_ZERO(&efds);
FD_SET(fd,&wfds);
FD_SET(fd,&efds);
- res = select(fd + 1,NULL,&wfds,&efds,NULL);
+ res = ast_select(fd + 1,NULL,&wfds,&efds,NULL);
if (!res) {
ast_log(LOG_DEBUG, "select (for write) ret. 0 on channel %d\n", p->channel);
continue;
@@ -1994,7 +2029,7 @@ static int zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags,
p1 = c1->pvt->pvt;
/* cant do pseudo-channels here */
if ((!p0->sig) || (!p1->sig)) return -2;
-
+
ast_pthread_mutex_lock(&c0->lock);
ast_pthread_mutex_lock(&c1->lock);
op0 = p0 = c0->pvt->pvt;
@@ -2875,15 +2910,15 @@ static struct ast_frame *zt_handle_event(struct ast_channel *ast)
case SIG_SF:
case SIG_SFWINK:
case SIG_SF_FEATD:
- if (strlen(p->dop.dialstr))
- res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop);
- else if (res < 0) {
+ res = ioctl(p->subs[SUB_REAL].zfd, ZT_DIAL, &p->dop);
+ if (res < 0) {
ast_log(LOG_WARNING, "Unable to initiate dialing on trunk channel %d\n", p->channel);
p->dop.dialstr[0] = '\0';
return NULL;
} else
ast_log(LOG_DEBUG, "Sent deferred digit string: %s\n", p->dop.dialstr);
p->dop.dialstr[0] = '\0';
+ p->dop.op = ZT_DIAL_OP_REPLACE;
break;
case SIG_FEATDMF:
case SIG_FEATB:
@@ -2907,6 +2942,9 @@ struct ast_frame *zt_exception(struct ast_channel *ast)
int res;
int usedindex=-1;
int index;
+ struct ast_frame *f;
+
+ ast_pthread_mutex_lock(&p->lock);
index = zt_get_index(ast, p, 1);
@@ -2983,15 +3021,21 @@ struct ast_frame *zt_exception(struct ast_channel *ast)
default:
ast_log(LOG_WARNING, "Don't know how to absorb event %s\n", event2str(res));
}
- return &p->subs[index].f;
+ f = &p->subs[index].f;
+ ast_pthread_mutex_unlock(&p->lock);
+ return f;
}
if (!p->radio) ast_log(LOG_DEBUG, "Exception on %d, channel %d\n", ast->fds[0],p->channel);
/* If it's not us, return NULL immediately */
if (ast != p->owner) {
ast_log(LOG_WARNING, "We're %s, not %s\n", ast->name, p->owner->name);
- return &p->subs[index].f;
+ f = &p->subs[index].f;
+ ast_pthread_mutex_unlock(&p->lock);
+ return f;
}
- return zt_handle_event(ast);
+ f = zt_handle_event(ast);
+ ast_pthread_mutex_unlock(&p->lock);
+ return f;
}
struct ast_frame *zt_read(struct ast_channel *ast)
@@ -3115,8 +3159,9 @@ struct ast_frame *zt_read(struct ast_channel *ast)
}
if (res != (p->subs[index].linear ? READ_SIZE * 2 : READ_SIZE)) {
ast_log(LOG_DEBUG, "Short read (%d/%d), must be an event...\n", res, p->subs[index].linear ? READ_SIZE * 2 : READ_SIZE);
+ f = zt_handle_event(ast);
pthread_mutex_unlock(&p->lock);
- return zt_handle_event(ast);
+ return f;
}
if (p->tdd) { /* if in TDD mode, see if we receive that */
int c;
@@ -3380,6 +3425,31 @@ static int zt_indicate(struct ast_channel *chan, int condition)
(p->sig != SIG_FXSGS)))
ast_setstate(chan, AST_STATE_RINGING);
}
+#if 0
+ break;
+#endif
+ /* Fall through */
+ case AST_CONTROL_PROGRESS:
+ ast_log(LOG_DEBUG,"Received AST_CONTROL_PROGRESS on %s\n",chan->name);
+#ifdef ZAPATA_PRI
+#ifdef PRI_EVENT_PROCEEDING
+ if (!p->proceeding && p->sig==SIG_PRI && p->pri && p->pri->overlapdial) {
+ if (p->pri->pri) {
+ if (!pri_grab(p, p->pri)) {
+ pri_acknowledge(p->pri->pri,p->call, p->prioffset, 1);
+ pri_rel(p->pri);
+ }
+ else
+ ast_log(LOG_WARNING, "Unable to grab PRI on span %d\n", p->span);
+ }
+ p->proceeding=1;
+ }
+#else
+ ast_log(LOG_WARNING, "Please update your libpri package if you want to use overlap sending\n");
+#endif
+#endif
+ /* don't continue in ast_indicate */
+ res = 0;
break;
case AST_CONTROL_CONGESTION:
res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_CONGESTION);
@@ -3529,11 +3599,6 @@ static struct ast_channel *zt_new(struct zt_pvt *i, int state, int startpbx, int
#ifdef ZAPATA_PRI
/* Assume calls are not idle calls unless we're told differently */
i->isidlecall = 0;
- if (i->sig == SIG_PRI) {
- /* Set to audio mode at this poitn mode */
- x = 1;
- ast_channel_setoption(tmp,AST_OPTION_AUDIO_MODE,&x,sizeof(char),0);
- }
#endif
/* Assure there is no confmute on this channel */
zt_confmute(i, 0);
@@ -3654,8 +3719,12 @@ static void *ss_thread(void *data)
else
ast_dsp_digitmode(p->dsp,DSP_DIGITMODE_DTMF | p->dtmfrelax);
}
- /* Wait for the first digit (up to 5 seconds). */
- res = ast_waitfordigit(chan,5000);
+ dtmfbuf[0] = 0;
+ /* Wait for the first digit only if immediate=no */
+ if (((p->sig == SIG_EM) || (p->sig == SIG_EMWINK)) && !p->immediate)
+ /* Wait for the first digit (up to 5 seconds). */
+ res = ast_waitfordigit(chan,5000);
+ else res = 0;
if (res > 0) {
/* save first char */
dtmfbuf[0] = res;
@@ -3991,6 +4060,8 @@ static void *ss_thread(void *data)
(!strcmp(nbridge->type,"Zap")) &&
ISTRUNK(pbridge)) {
int func = ZT_FLASH;
+ /* Clear out the dial buffer */
+ p->dop.dialstr[0] = '\0';
/* flash hookswitch */
if ((ioctl(pbridge->subs[SUB_REAL].zfd,ZT_HOOK,&func) == -1) && (errno != EINPROGRESS)) {
ast_log(LOG_WARNING, "Unable to flash external trunk on channel %s: %s\n",
@@ -4221,7 +4292,11 @@ static int handle_init_event(struct zt_pvt *i, int event)
chan = zt_new(i, AST_STATE_DOWN, 0, SUB_REAL, 0);
if (chan) {
if (has_voicemail(i))
+#ifdef ZT_TONE_STUTTER
+ res = tone_zone_play_tone(i->subs[SUB_REAL].zfd, ZT_TONE_STUTTER);
+#else
res = tone_zone_play_tone(i->subs[SUB_REAL].zfd, ZT_TONE_DIALRECALL);
+#endif
else
res = tone_zone_play_tone(i->subs[SUB_REAL].zfd, ZT_TONE_DIALTONE);
if (res < 0)
@@ -4391,7 +4466,7 @@ static void *do_monitor(void *data)
/* Wait at least a second for something to happen */
tv.tv_sec = 1;
tv.tv_usec = 0;
- res = select(n + 1, &rfds, NULL, &efds, &tv);
+ res = ast_select(n + 1, &rfds, NULL, &efds, &tv);
pthread_testcancel();
/* Okay, select has finished. Let's see what happened. */
if (res < 0) {
@@ -4756,6 +4831,7 @@ static struct zt_pvt *mkintf(int channel, int signalling, int radio)
pris[span].dchannel = dchannel;
pris[span].minunused = minunused;
pris[span].minidle = minidle;
+ pris[span].overlapdial = overlapdial;
strncpy(pris[span].idledial, idledial, sizeof(pris[span].idledial) - 1);
strncpy(pris[span].idleext, idleext, sizeof(pris[span].idleext) - 1);
@@ -5276,7 +5352,7 @@ static void *pri_dchannel(void *vpri)
fd_set efds;
fd_set rfds;
int res;
- int chan;
+ int chan = 0;
int x;
int haveidles;
int activeidles;
@@ -5421,7 +5497,7 @@ static void *pri_dchannel(void *vpri)
pthread_mutex_unlock(&pri->lock);
e = NULL;
- res = select(pri->fd + 1, &rfds, NULL, &efds, &tv);
+ res = ast_select(pri->fd + 1, &rfds, NULL, &efds, &tv);
ast_pthread_mutex_lock(&pri->lock);
if (!res) {
@@ -5516,8 +5592,11 @@ static void *pri_dchannel(void *vpri)
strcpy(pri->pvt[chan]->callerid, "");
strncpy(pri->pvt[chan]->rdnis, e->ring.redirectingnum, sizeof(pri->pvt[chan]->rdnis));
}
+ /* If immediate=yes go to s|1 */
+ if (pri->pvt[chan]->immediate)
+ strcpy(pri->pvt[chan]->exten, "s");
/* Get called number */
- if (strlen(e->ring.callednum)) {
+ else if (strlen(e->ring.callednum)) {
strncpy(pri->pvt[chan]->exten, e->ring.callednum, sizeof(pri->pvt[chan]->exten)-1);
}
#if 0
@@ -5526,10 +5605,25 @@ static void *pri_dchannel(void *vpri)
#endif
else
strcpy(pri->pvt[chan]->exten, "");
+ /* queue DTMF frame if the PBX for this call was already started (we're forwarding INFORMATION further on */
+ if (pri->overlapdial && pri->pvt[chan]->call==e->ring.call && pri->pvt[chan]->owner) {
+ /* how to do that */
+ char digit = e->ring.callednum[strlen(e->ring.callednum)-1];
+ struct ast_frame f = { AST_FRAME_DTMF, digit, };
+ /* make sure that we store the right number in CDR */
+ if (pri->pvt[chan]->owner->cdr)
+ strncat(pri->pvt[chan]->owner->cdr->dst,&digit,1);
+ ast_queue_frame(pri->pvt[chan]->owner, &f, 0);
+ }
/* Make sure extension exists */
- if (strlen(pri->pvt[chan]->exten) && ast_exists_extension(NULL, pri->pvt[chan]->context, pri->pvt[chan]->exten, 1, pri->pvt[chan]->callerid)) {
+ /* If extensions is empty then make sure we send later on SETUP_ACKNOWLEDGE to get digits in overlap mode */
+ else if (strlen(pri->pvt[chan]->exten) && ast_exists_extension(NULL, pri->pvt[chan]->context, pri->pvt[chan]->exten, 1, pri->pvt[chan]->callerid)) {
/* Setup law */
int law;
+ /* Set to audio mode at this poitn mode */
+ law = 1;
+ if (ioctl(pri->pvt[chan]->subs[SUB_REAL].zfd, ZT_AUDIOMODE, &law) == -1)
+ ast_log(LOG_WARNING, "Unable to set audio mode on channel %d to %d\n", pri->pvt[chan]->channel, law);
if (e->ring.layer1 == PRI_LAYER_1_ALAW)
law = ZT_LAW_ALAW;
else
@@ -5547,7 +5641,13 @@ static void *pri_dchannel(void *vpri)
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Accepting call from '%s' to '%s' on channel %d, span %d\n",
e->ring.callingnum, pri->pvt[chan]->exten, chan, pri->span);
- pri_acknowledge(pri->pri, e->ring.call, chan, 1);
+ if (!pri->overlapdial) {
+ pri_acknowledge(pri->pri, e->ring.call, chan, 1);
+ }
+ /* If we got here directly and didn't send the SETUP_ACKNOWLEDGE we need to send it otherwise we don't sent anything */
+ else if (e->e==PRI_EVENT_RING) {
+ pri_need_more_info(pri->pri, e->ring.call, chan, 1);
+ }
zt_enable_ec(pri->pvt[chan]);
} else {
ast_log(LOG_WARNING, "Unable to start PBX on channel %d, span %d\n", chan, pri->span);
@@ -5557,11 +5657,11 @@ static void *pri_dchannel(void *vpri)
} else {
if (!strlen(pri->pvt[chan]->exten) || ast_matchmore_extension(NULL, pri->pvt[chan]->context, pri->pvt[chan]->exten, 1, pri->pvt[chan]->callerid))
{
+ /* Send SETUP_ACKNOWLEDGE only when we receive SETUP, don't send if we got INFORMATION */
if (e->e==PRI_EVENT_RING) pri_need_more_info(pri->pri, e->ring.call, chan, 1);
} else {
if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "Extension '%s' in context '%s' from '%s' does not exist. Rejecting call on channel %d, span %d\n",
- pri->pvt[chan]->exten, pri->pvt[chan]->context, pri->pvt[chan]->callerid, chan, pri->span);
+ ast_verbose(VERBOSE_PREFIX_3 "Extension '%s' in context '%s' from '%s' does not exist. Rejecting call on channel %d, span %d\n",pri->pvt[chan]->exten, pri->pvt[chan]->context, pri->pvt[chan]->callerid, chan, pri->span);
pri_release(pri->pri, e->ring.call, PRI_CAUSE_UNALLOCATED);
}
}
@@ -5585,10 +5685,34 @@ static void *pri_dchannel(void *vpri)
} else if (!strlen(pri->pvt[chan]->dop.dialstr)) {
zt_enable_ec(pri->pvt[chan]);
pri->pvt[chan]->subs[SUB_REAL].needringing =1;
+#ifdef PRI_EVENT_PROCEEDING
+ pri->pvt[chan]->proceeding=1;
+#endif
} else
ast_log(LOG_DEBUG, "Deferring ringing notification because of extra digits to dial...\n");
}
+#ifndef PRI_EVENT_PROCEEDING
break;
+#else
+ /* Fall through */
+ if (!chan) break;
+#endif
+#ifdef PRI_EVENT_PROCEEDING
+ case PRI_EVENT_PROCEEDING:
+ /* Get chan value if e->e is not PRI_EVNT_RINGING */
+ if (e->e == PRI_EVENT_PROCEEDING)
+ chan = e->proceeding.channel;
+ if ((chan >= 1) && (chan <= pri->channels))
+ if (pri->pvt[chan] && pri->overlapdial && !pri->pvt[chan]->proceeding) {
+ struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_PROGRESS, };
+ ast_log(LOG_DEBUG, "queling frame from PRI_EVENT_PROCEEDING on channel %d span %d\n",chan,pri->pvt[chan]->span);
+ ast_queue_frame(pri->pvt[chan]->owner, &f, 0);
+
+ pri->pvt[chan]->proceeding=1;
+ }
+
+ break;
+#endif
case PRI_EVENT_FACNAME:
chan = e->facname.channel;
if ((chan < 1) || (chan > pri->channels)) {
@@ -5749,14 +5873,18 @@ static void *pri_dchannel(void *vpri)
}
}
break;
-#ifdef PRI_EVENT_PROCEEDING
- case PRI_EVENT_PROCEEDING:
- chan = e->proceeding.channel;
- if ((chan >= 1) && (chan <= pri->channels))
- if (pri->pvt[chan])
- pri->pvt[chan]->proceeding=1;
+#ifdef PRI_EVENT_SETUP_ACK
+ case PRI_EVENT_SETUP_ACK:
+ chan = e->setup_ack.channel;
+ if ((chan < 1) || (chan > pri->channels)) {
+ ast_log(LOG_WARNING, "Received SETUP_ACKNOWLEDGE on strange channel %d span %d\n", chan, pri->span);
+ } else if (!pri->pvt[chan]) {
+ ast_log(LOG_WARNING, "Received SETUP_ACKNOWLEDGE on unconfigured channel %d span %d\n", chan, pri->span);
+ } else {
+ pri->pvt[chan]->setup_ack = 1;
+ }
break;
-#endif
+#endif
default:
ast_log(LOG_DEBUG, "Event: %d\n", e->e);
}
@@ -5818,6 +5946,9 @@ static int start_pri(struct zt_pri *pri)
ast_log(LOG_ERROR, "Unable to create PRI structure\n");
return -1;
}
+#ifdef PRI_SET_OVERLAPDIAL
+ pri_set_overlapdial(pri->pri,pri->overlapdial);
+#endif
pri_set_debug(pri->pri, DEFAULT_PRI_DEBUG);
if (pthread_create(&pri->master, NULL, pri_dchannel, pri)) {
close(pri->fd);
@@ -6120,6 +6251,13 @@ static int zap_show_channel(int fd, int argc, char **argv)
} else {
ast_cli(fd, "Actual Confinfo: Num/%d, Mode/0x%04x\n", ci.confno, ci.confmode);
}
+#ifdef ZT_GETCONFMUTE
+ if (ioctl(tmp->subs[SUB_REAL].zfd, ZT_GETCONFMUTE, &x)) {
+ ast_log(LOG_WARNING, "Failed to get confmute info on channel %d\n", tmp->channel);
+ } else {
+ ast_cli(fd, "Actual Confmute: %s\n", x ? "Yes" : "No");
+ }
+#endif
ast_pthread_mutex_unlock(&iflock);
return RESULT_SUCCESS;
}
@@ -6472,6 +6610,8 @@ int load_module()
strncpy(idleext, v->value, sizeof(idleext) - 1);
} else if (!strcasecmp(v->name, "idledial")) {
strncpy(idledial, v->value, sizeof(idledial) - 1);
+ } else if (!strcasecmp(v->name, "overlapdial")) {
+ overlapdial = ast_true(v->value);
#endif
} else
ast_log(LOG_WARNING, "Ignoring %s\n", v->name);
@@ -6949,7 +7089,7 @@ static int zt_sendtext(struct ast_channel *c, char *text)
FD_ZERO(&efds);
FD_SET(fd,&wfds);
FD_SET(fd,&efds);
- res = select(fd + 1,NULL,&wfds,&efds,NULL);
+ res = ast_select(fd + 1,NULL,&wfds,&efds,NULL);
if (!res) {
ast_log(LOG_DEBUG, "select (for write) ret. 0 on channel %d\n", p->channel);
continue;