ipcpd: normal: Add policy for obtaining a flat address

This adds a policy for obtaining a flat address, and thus also the
infrastructure for policies in the IPCP. The IPCP should check if the
address is available; this is currently not there yet.

1 files changed, 63 insertions, 0 deletions

diff --git a/src/ipcpd/normal/flat.c b/src/ipcpd/normal/flat.c
new file mode 100644
index 00000000..8caa85b4
--- /dev/null
+++ b/src/ipcpd/normal/flat.c
@@ -0,0 +1,63 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Policy for flat addresses in a distributed way
+ *
+ *    Sander Vrijders <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define OUROBOROS_PREFIX "flat-addr-auth"
+
+#include <ouroboros/config.h>
+#include <ouroboros/logs.h>
+
+#include <time.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "shm_pci.h"
+#include "ribmgr.h"
+
+int flat_init(void)
+{
+        srand(time(NULL));
+
+        return 0;
+}
+
+int flat_fini(void)
+{
+        return 0;
+}
+
+uint64_t flat_address(void)
+{
+        uint64_t addr;
+        uint64_t max_addr;
+        struct dt_const * dtc;
+
+        dtc = ribmgr_dt_const();
+        if (dtc == NULL)
+                return INVALID_ADDR;
+
+        max_addr = (1 << (8 * dtc->addr_size)) - 1;
+        addr = (rand() % (max_addr - 1)) + 1;
+
+        /* FIXME: Add check for uniqueness of address */
+
+        return addr;
+}