ftmod_misdn: Remove unused timerfd code.

Timer-based b-channel tx gating won't work anyway, so remove all those
"#if 0"-ed bits of cruft.

Also remove the mISDN-specific timerfd_create() check in configure.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

libs/freetdm/configure.ac

@@ -407,22 +407,13 @@ AC_ARG_WITH([misdn],
 )
 AS_IF([test "${with_misdn}" != "no"],
 	[AC_MSG_RESULT([${as_nl}<<>> ftmod_misdn (Linux mISDN I/O plugin)])
-	 AC_CHECK_FUNCS([timerfd_create],,
-		[AS_IF([test "${with_misdn}" = "yes"],
-			[AC_MSG_ERROR([no timerfd support in libc])],
-			[AC_MSG_NOTICE([no timerfd support in libc])]
-		 )]
-	 )
-	 AC_CHECK_HEADER([mISDN/mISDNif.h],,
+	 AC_CHECK_HEADER([mISDN/mISDNif.h],
+		[HAVE_MISDN="yes"],
 		[AS_IF([test "${with_misdn}" = "yes"],
 			[AC_MSG_ERROR([mISDN/mISDNif.h not found])],
 			[AC_MSG_NOTICE([mISDN/mISDNif.h not found])]
 		)],
 		[#include <sys/socket.h>]
-	 )
-	 AS_IF([test "${ac_cv_func_timerfd_create}" = "yes" -a "${ac_cv_header_mISDN_mISDNif_h}" = "yes"],
-		[HAVE_MISDN="yes"],
-		[AC_MSG_NOTICE([Some required dependencies are missing, module disabled])]
 	 )]
 )
 AM_CONDITIONAL([HAVE_MISDN], [test "${HAVE_MISDN}" = "yes"])

libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c

@@ -45,8 +45,6 @@
 #include <poll.h>
 #include <pthread.h>
 
-#include <sys/timerfd.h>
-
 /* this is how it should have been...
 #ifdef HAVE_FREETDM_FREETDM_H
 #include <freetdm/freetdm.h>
@@ -256,7 +254,6 @@ struct misdn_chan_private {
 	/* */
 	int state;
 	int debugfd;
-	int timerfd;
 	int active;
 
 	/* hw addr of channel */
@@ -941,36 +938,7 @@ static FIO_OPEN_FUNCTION(misdn_open)
 	ftdm_log_chan_msg(ftdmchan, FTDM_LOG_DEBUG, "mISDN channel activation request sent\n");
 
 	switch (ftdmchan->type) {
-	case FTDM_CHAN_TYPE_B: {
-#if 0
-			struct itimerspec its = {
-				.it_interval = { 0, 0 },
-				.it_value    = { 0, 0 },
-			};
-
-			its.it_interval.tv_nsec = (ftdmchan->effective_interval * 1000000);
-			its.it_value.tv_nsec    = (ftdmchan->effective_interval * 1000000);
-
-			/* create tx timerfd */
-			chan_priv->timerfd = timerfd_create(CLOCK_MONOTONIC, O_NONBLOCK);
-			if (chan_priv->timerfd < 0) {
-				ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "mISDN failed to create b-channel tx interval timer: %s\n",
-					strerror(errno));
-				return FTDM_FAIL;
-			}
-
-			/* start tx timerfd */
-			ret = timerfd_settime(chan_priv->timerfd, 0, &its, NULL);
-			if (ret < 0) {
-				ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "mISDN failed to start b-channel tx interval timer: %s\n",
-					strerror(errno));
-				return FTDM_FAIL;
-			}
-
-			ftdm_log_chan(ftdmchan, FTDM_LOG_DEBUG, "mISDN created tx interval (%d ms) timer\n",
-				ftdmchan->effective_interval);
-#endif
-		}
+	case FTDM_CHAN_TYPE_B:
 	case FTDM_CHAN_TYPE_DQ921:
 		chan_priv->state = MISDN_CHAN_STATE_OPEN;
 		break;
@@ -998,15 +966,6 @@ static FIO_CLOSE_FUNCTION(misdn_close)
 
 	/* deactivate b-channels on close */
 	if (ftdm_channel_get_type(ftdmchan) == FTDM_CHAN_TYPE_B) {
-#if 0
-		/*
-		 * Stop tx timerfd
-		 */
-		if (chan_priv->timerfd >= 0) {
-			close(chan_priv->timerfd);
-			chan_priv->timerfd = -1;
-		}
-#endif
 		/*
 		 * Send deactivation request (don't wait for answer)
 		 */
@@ -1570,7 +1529,6 @@ static ftdm_status_t misdn_open_range(ftdm_span_t *span, ftdm_chan_type_t type,
 
 		priv->addr    = addr;
 		priv->debugfd = -1;
-		priv->timerfd = -1;
 
 		/*
 		 * Create event queue