mesh: test AEAD at startup to check kernel support

One time test at startup to ensure either kernel version v4.9 or later,
*or* that required AES-CCM support has been back-ported. If support not
there, daemon will run without providing D-Bus service or attaching to
controllers (prevents systemd thrashing).

1 files changed, 7 insertions, 0 deletions

diff --git a/mesh/main.c b/mesh/main.c
index 262e3da48..273651f97 100644
--- a/mesh/main.c
+++ b/mesh/main.c
@@ -34,6 +34,7 @@
 #include "lib/mgmt.h"
 
 #include "mesh/mesh.h"
+#include "mesh/crypto.h"
 #include "mesh/dbus.h"
 #include "mesh/mesh-io.h"
 
@@ -121,6 +122,12 @@ int main(int argc, char *argv[])
 
 	l_log_set_stderr();
 
+	if (!mesh_crypto_check_avail()) {
+		l_error("Mesh Crypto functions unavailable");
+		status = l_main_run_with_signal(signal_handler, NULL);
+		goto done;
+	}
+
 	for (;;) {
 		int opt;
 		const char *str;