1 files changed, 79 insertions, 0 deletions
diff --git a/src/ipcpd/unicast/addr-auth/flat.c b/src/ipcpd/unicast/addr-auth/flat.c
new file mode 100644
index 00000000..c4562935
--- /dev/null
+++ b/src/ipcpd/unicast/addr-auth/flat.c
@@ -0,0 +1,79 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2024
+ *
+ * Policy for flat addresses in a distributed way
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., http://www.fsf.org/about/contact/.
+ */
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200112L
+#endif
+
+#define OUROBOROS_PREFIX "flat-addr-auth"
+
+#include <ouroboros/logs.h>
+#include <ouroboros/random.h>
+
+#include "ipcp.h"
+#include "flat.h"
+
+#define NAME_LEN 8
+
+struct {
+        uint8_t addr_size;
+} flat;
+
+#define INVALID_ADDRESS 0
+
+struct addr_auth_ops flat_ops = {
+        .init    = flat_init,
+        .fini    = flat_fini,
+        .address = flat_address
+};
+
+int flat_init(const void * info)
+{
+        flat.addr_size = *((uint8_t *) info);
+
+        if (flat.addr_size != 4) {
+                log_err("Flat address policy mandates 4 byte addresses.");
+                return -1;
+        }
+
+        return 0;
+}
+
+int flat_fini(void)
+{
+        return 0;
+}
+
+uint64_t flat_address(void)
+{
+        uint32_t addr = INVALID_ADDRESS;
+
+#if defined (CONFIG_OUROBOROS_DEBUG) && defined (IPCP_DEBUG_LOCAL)
+        addr = getpid();
+#else
+        while (addr == INVALID_ADDRESS)
+                random_buffer(&addr,sizeof(addr));
+#endif
+        return addr;
+}