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ftmod_misdn: Rework mISDN channel de-/activation. 

Remove the 'state' variable of per-channel data, use active flag exclusively to track
open/close state.

Add misdn_activate_channel()/misdn_deactivate_channel() helper functions, rename old
one to _misdn_toggle_channel() (internal).

Add _nowait variant of channel de-/activation function, that just sends the mISDN request message.

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>
This commit is contained in:
Stefan Knoblich 2012-07-25 11:21:29 +02:00
parent 890ecc6d45
commit 7d0dcb6175
1 changed files with 106 additions and 32 deletions
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138
libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c
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@ -245,14 +245,10 @@ struct misdn_span_private {
pthread_cond_t event_cond;
};
#define MISDN_CHAN_STATE_CLOSED 0
#define MISDN_CHAN_STATE_OPEN 1
struct misdn_event_queue;
struct misdn_chan_private {
/* */
int state;
int debugfd;
int active;
@ -470,7 +466,50 @@ static inline int ts_before(struct timespec *a, struct timespec *b)
return 0;
}
static ftdm_status_t misdn_activate_channel(ftdm_channel_t *chan, int activate)
/*
* Asynchronous channel (de-)activation
*/
static ftdm_status_t _misdn_toggle_channel_nowait(ftdm_channel_t *chan, int activate)
{
struct misdn_chan_private *priv = ftdm_chan_io_private(chan);
char buf[MAX_DATA_MEM] = { 0 };
struct mISDNhead *hh = (struct mISDNhead *) buf;
int retval;
/* NOTE: sending PH_DEACTIVATE_REQ to closed b-channels kills the d-channel (hfcsusb)... */
if ((activate && priv->active) || (!activate && !priv->active))
return FTDM_SUCCESS;
ftdm_log_chan(chan, FTDM_LOG_DEBUG, "mISDN sending %s request\n",
(activate) ? "activation" : "deactivation");
/* prepare + send request primitive */
hh->prim = (activate) ? PH_ACTIVATE_REQ : PH_DEACTIVATE_REQ;
hh->id = MISDN_ID_ANY;
if ((retval = sendto(chan->sockfd, hh, sizeof(*hh), 0, NULL, 0)) < sizeof(*hh)) {
ftdm_log_chan(chan, FTDM_LOG_ERROR, "mISDN failed to send activation request: %s\n",
strerror(errno));
return FTDM_FAIL;
}
return FTDM_SUCCESS;
}
static ftdm_status_t misdn_activate_channel_nowait(ftdm_channel_t *chan)
{
return _misdn_toggle_channel_nowait(chan, 1);
}
static ftdm_status_t misdn_deactivate_channel_nowait(ftdm_channel_t *chan)
{
return _misdn_toggle_channel_nowait(chan, 0);
}
/*
* Synchronous channel (de-)activation
*/
static ftdm_status_t _misdn_toggle_channel(ftdm_channel_t *chan, int activate)
{
struct misdn_chan_private *priv = ftdm_chan_io_private(chan);
char buf[MAX_DATA_MEM] = { 0 };
@ -590,6 +629,16 @@ out:
return FTDM_SUCCESS;
}
static ftdm_status_t misdn_activate_channel(ftdm_channel_t *chan)
{
return _misdn_toggle_channel(chan, 1);
}
static ftdm_status_t misdn_deactivate_channel(ftdm_channel_t *chan)
{
return _misdn_toggle_channel(chan, 0);
}
#if 0 /* unused for now */
static ftdm_status_t misdn_get_ph_info(ftdm_channel_t *chan, struct ph_info *info)
@ -917,7 +966,7 @@ static FIO_OPEN_FUNCTION(misdn_open)
assert(chan_priv);
assert(span_priv);
if (chan_priv->state == MISDN_CHAN_STATE_OPEN) {
if (chan_priv->active) {
ftdm_log_chan_msg(ftdmchan, FTDM_LOG_INFO, "mISDN channel is already open, skipping activation\n");
return FTDM_SUCCESS;
}
@ -928,24 +977,27 @@ static FIO_OPEN_FUNCTION(misdn_open)
/*
* Send activation request
*/
ret = misdn_activate_channel(ftdmchan, 1);
ret = misdn_activate_channel(ftdmchan);
if (ret != FTDM_SUCCESS) {
ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "Failed to activate channel (socket: %d)\n",
ftdmchan->sockfd);
return FTDM_FAIL;
}
/*
* Ignore error, ftdm_channel_open() does not correctly handle return FTDM_FAIL cases.
* We will try to activate the channel later.
*/
} else {
ftdm_log_chan_msg(ftdmchan, FTDM_LOG_DEBUG, "mISDN channel activation request sent\n");
ftdm_log_chan_msg(ftdmchan, FTDM_LOG_DEBUG, "mISDN channel activation request sent\n");
switch (ftdmchan->type) {
case FTDM_CHAN_TYPE_B:
case FTDM_CHAN_TYPE_DQ921:
chan_priv->state = MISDN_CHAN_STATE_OPEN;
break;
default:
ftdm_log_chan(ftdmchan, FTDM_LOG_DEBUG, "mISDN invalid channel type '%s'\n",
ftdm_channel_get_type_str(ftdmchan));
break;
switch (ftdmchan->type) {
case FTDM_CHAN_TYPE_B:
case FTDM_CHAN_TYPE_DQ921:
chan_priv->active = 1;
break;
default:
ftdm_log_chan(ftdmchan, FTDM_LOG_DEBUG, "mISDN invalid channel type '%s'\n",
ftdm_channel_get_type_str(ftdmchan));
break;
}
}
return FTDM_SUCCESS;
}
@ -964,21 +1016,25 @@ static FIO_CLOSE_FUNCTION(misdn_close)
ftdm_log_chan(ftdmchan, FTDM_LOG_NOTICE, "mISDN trying to close %c-channel\n",
ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B ? 'B' : 'D');
/* deactivate b-channels on close */
if (ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B) {
/*
* Send deactivation request (don't wait for answer)
*/
ret = misdn_activate_channel(ftdmchan, 0);
if (chan_priv->active) {
if (ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B) {
ret = misdn_deactivate_channel(ftdmchan);
} else {
/* Don't wait for D-Channel deactivation */
ret = misdn_deactivate_channel_nowait(ftdmchan);
}
if (ret != FTDM_SUCCESS) {
ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "Failed to deactivate %c-channel\n",
ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B ? 'B' : 'D');
return FTDM_FAIL;
/* Ignore error, channel might be closed already */
} else {
ftdm_log_chan(ftdmchan, FTDM_LOG_INFO, "mISDN %c-channel deactivated\n",
ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B ? 'B' : 'D');
}
ftdm_log_chan(ftdmchan, FTDM_LOG_INFO, "mISDN %c-channel deactivated\n",
ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B ? 'B' : 'D');
chan_priv->state = MISDN_CHAN_STATE_CLOSED;
chan_priv->active = 0;
}
return FTDM_SUCCESS;
@ -1214,7 +1270,7 @@ static FIO_READ_FUNCTION(misdn_read)
int retval;
int maxretry = 10;
if (priv->state == MISDN_CHAN_STATE_CLOSED) {
if (!priv->active) {
ftdm_log_chan_msg(ftdmchan, FTDM_LOG_DEBUG, "mISDN ignoring read on closed channel\n");
/* ignore */
*datalen = 0;
@ -1369,6 +1425,13 @@ static FIO_WRITE_FUNCTION(misdn_write)
switch (ftdm_channel_get_type(ftdmchan)) {
case FTDM_CHAN_TYPE_B:
/*
* Check state, send activation request (async) if channel is not open
*/
if (!priv->active) {
misdn_activate_channel_nowait(ftdmchan);
return FTDM_SUCCESS; /* eat data */
}
/*
* Write to audio pipe, misdn_read() will pull
* from there as needed and send it to the b-channel
@ -1393,6 +1456,17 @@ static FIO_WRITE_FUNCTION(misdn_write)
memcpy(wbuf + MISDN_HEADER_LEN, data, size);
size += MISDN_HEADER_LEN;
/*
* Check state, send activation request (sync) if channel is not open
*/
if (!priv->active) {
retval = misdn_activate_channel(ftdmchan);
if (retval) {
*datalen = 0;
return FTDM_FAIL;
}
}
/* wait for channel to get ready */
wflags = FTDM_WRITE;
retval = misdn_wait(ftdmchan, &wflags, 20);
@ -1563,7 +1637,7 @@ static ftdm_status_t misdn_open_range(ftdm_span_t *span, ftdm_chan_type_t type,
} else {
/* early activate D-Channel */
misdn_activate_channel(ftdmchan, 1);
misdn_activate_channel(ftdmchan);
ftdmchan->native_codec = ftdmchan->effective_codec = FTDM_CODEC_NONE;
}
num_configured++;