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[ftmod_misdn] Make misdn_handle_mph_information_ind() cope with hfcsusb-style MPH_INFORMATION_IND messages. 

Only two mISDN hardware drivers emit MPH_INFORMATION_IND messages and both use a different payload:

	- hfcsusb (HFC-based USB dongle) sends a set of ph_info + ph_info_ch structures
	  which contain the complete state information of the port
	  (including internal hw-specific state and flags).

	- hfcmulti which sends a single integer, a single L1_SIGNAL_* event.

We now try to guess the type of message from the payload length.

The hfcmulti signals are converted to FreeTDM alarm flags; the hfcsusb
state/flags are defined in kernel internal hw-specific headers and are ignored ATM (todo).

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>
This commit is contained in:
Stefan Knoblich 2012-02-07 18:25:29 +01:00
parent 452c13573d
commit 810f0d4eaa
1 changed files with 78 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c
View File

@ -622,50 +622,88 @@ static int misdn_handle_ph_control_ind(ftdm_channel_t *chan, const struct mISDNh
static int misdn_handle_mph_information_ind(ftdm_channel_t *chan, const struct mISDNhead *hh, const void *data, const int data_len)
{
struct misdn_chan_private *priv = ftdm_chan_io_private(chan);
int alarm_flags, value;
if (data_len < sizeof(value)) {
ftdm_log_chan_msg(chan, FTDM_LOG_ERROR, "mISDN MPH_INFORMATION_IND message is too short\n");
/*
* mISDN has some inconsistency issues here.
*
* There are only two drivers that emit MPH_INFORMATION_IND messages,
* hfcsusb and hfcmulti. The former sends a set of ph_info and ph_info_ch structures,
* while the latter just sends an int containing the current L1_SIGNAL_* event id.
*
* The flags and state information in the ph_info and ph_info_ch structures
* are defined in kernel internal hw-specific headers (mISDNhw.h).
*
* Use the payload size to guess the type of message.
*/
if (data_len >= sizeof(struct ph_info)) {
/* complete port status, hfcsusb sends this */
struct ph_info *info = (struct ph_info *)data;
struct ph_info_ch *bch_info = NULL;
if (data_len < (sizeof(*info) + info->dch.num_bch * sizeof(*bch_info))) {
ftdm_log_chan_msg(chan, FTDM_LOG_ERROR, "mISDN MPH_INFORMATION_IND message is too short\n");
return FTDM_FAIL;
}
bch_info = &info->bch[0];
ftdm_log_chan(chan, FTDM_LOG_DEBUG, "mISDN port state:\n\tD-Chan state:\t%hu\n\tD-Chan flags:\t%#x\n\tD-Chan proto:\t%hu\n\tD-Chan active:\t%s\n",
info->dch.state, info->dch.ch.Flags, info->dch.ch.protocol, info->dch.ch.Flags & (1 << 6) ? "yes" : "no");
/* TODO: try to translate this to a usable set of alarm flags */
} else if (data_len == sizeof(int)) {
/* alarm info, sent by hfcmulti */
int value = *(int *)data;
int alarm_flags = chan->alarm_flags;
if (data_len < sizeof(value)) {
ftdm_log_chan_msg(chan, FTDM_LOG_ERROR, "mISDN MPH_INFORMATION_IND message is too short\n");
return FTDM_FAIL;
}
switch (value) {
case L1_SIGNAL_LOS_ON:
alarm_flags |= FTDM_ALARM_RED;
break;
case L1_SIGNAL_LOS_OFF:
alarm_flags &= ~FTDM_ALARM_RED;
break;
case L1_SIGNAL_AIS_ON:
alarm_flags |= FTDM_ALARM_AIS;
break;
case L1_SIGNAL_AIS_OFF:
alarm_flags &= ~FTDM_ALARM_AIS;
break;
case L1_SIGNAL_RDI_ON:
alarm_flags |= FTDM_ALARM_YELLOW;
break;
case L1_SIGNAL_RDI_OFF:
alarm_flags &= ~FTDM_ALARM_YELLOW;
break;
case L1_SIGNAL_SLIP_RX:
priv->slip_rx_cnt++;
break;
case L1_SIGNAL_SLIP_TX:
priv->slip_tx_cnt++;
break;
default:
ftdm_log_chan(chan, FTDM_LOG_ERROR, "mISDN unknown MPH_INFORMATION_IND signal: %#04x\n",
value);
return FTDM_FAIL;
}
/* check whether alarm status has changed, update channel flags if it has */
if ((value = (alarm_flags ^ chan->alarm_flags))) {
ftdm_log_chan(chan, FTDM_LOG_DEBUG, "mISDN alarm flags have changed %#x -> %#x\n",
chan->alarm_flags, alarm_flags);
chan->alarm_flags ^= value;
}
} else {
ftdm_log_chan(chan, FTDM_LOG_ERROR, "mISDN sent MPH_INFORMATION_IND message with unknown size %d\n",
data_len);
return FTDM_FAIL;
}
value = *(int *)data;
alarm_flags = chan->alarm_flags;
switch (value) {
case L1_SIGNAL_LOS_ON:
alarm_flags |= FTDM_ALARM_RED;
break;
case L1_SIGNAL_LOS_OFF:
alarm_flags &= ~FTDM_ALARM_RED;
break;
case L1_SIGNAL_AIS_ON:
alarm_flags |= FTDM_ALARM_AIS;
break;
case L1_SIGNAL_AIS_OFF:
alarm_flags &= ~FTDM_ALARM_AIS;
break;
case L1_SIGNAL_RDI_ON:
alarm_flags |= FTDM_ALARM_YELLOW;
break;
case L1_SIGNAL_RDI_OFF:
alarm_flags &= ~FTDM_ALARM_YELLOW;
break;
case L1_SIGNAL_SLIP_RX:
priv->slip_rx_cnt++;
break;
case L1_SIGNAL_SLIP_TX:
priv->slip_tx_cnt++;
break;
default:
ftdm_log_chan(chan, FTDM_LOG_ERROR, "mISDN unknown MPH_INFORMATION_IND message: %d\n",
value);
return FTDM_FAIL;
}
if ((value = (alarm_flags ^ chan->alarm_flags))) {
ftdm_log_chan(chan, FTDM_LOG_DEBUG, "mISDN alarm flags have changed %#x -> %#x\n",
chan->alarm_flags, alarm_flags);
chan->alarm_flags ^= value;
}
return FTDM_SUCCESS;
}