dlt-connection: add socket timeout

in some scenarios a socket might block forever.
This means dlt-daemon won't respond properly anymore.
To fix this a timeout is added to the dlt-daemon socket connection.

Signed-off-by: Alexander Mohr <alexander.m.mohr@mercedes-benz.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/daemon/dlt_daemon_connection.c b/src/daemon/dlt_daemon_connection.c
index 805afed..1658e26 100644
--- a/src/daemon/dlt_daemon_connection.c
+++ b/src/daemon/dlt_daemon_connection.c
@@ -402,6 +402,21 @@ int dlt_connection_create(DltDaemonLocal *daemon_local,
         return -1;
     }
 
+    struct timeval timeout;
+    timeout.tv_sec = 5;
+    timeout.tv_usec = 0;
+#ifdef DLT_SYSTEMD_WATCHDOG_ENABLE
+    char *watchdogUSec = getenv("WATCHDOG_USEC");
+    if (watchdogUSec) {
+        timeout.tv_sec = atoi(watchdogUSec) / 1000000;
+        timeout.tv_usec = atoi(watchdogUSec) % 1000000;
+    }
+#endif
+
+    if (setsockopt (temp->receiver->fd, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof timeout) < 0)  {
+        dlt_vlog(LOG_WARNING, "Unable to set send timeout %s.\n", strerror(errno));
+    }
+
     /* We are single threaded no need for protection. */
     temp->id = connectionId++;