lib: Revise CACEP

Revises CACEP policies to stateless library calls. It provides two
policies: an anonymous authentication policy that will generate random
credentials for the peer, and a simple authentication policy that will
return a name for the peer and an address.

Changes the normal IPCP to use the updates API calls.

1 files changed, 81 insertions, 0 deletions

diff --git a/src/lib/pol/cacep_anonymous_auth.c b/src/lib/pol/cacep_anonymous_auth.c
new file mode 100644
index 00000000..d450fdc5
--- /dev/null
+++ b/src/lib/pol/cacep_anonymous_auth.c
@@ -0,0 +1,81 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Anonymous policy for CACEP
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/cacep.h>
+#include <ouroboros/time_utils.h>
+
+#include "cacep_anonymous_auth.h"
+
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <stdio.h>
+
+#define NAME_LEN 8
+
+/* this policy generates a hex string */
+static struct cacep_info * anonymous_info(void)
+{
+        struct cacep_info * info;
+        struct timespec t;
+
+        info = malloc(sizeof(*info));
+        if (info == NULL)
+                return NULL;
+
+        info->name = malloc(NAME_LEN + 1);
+        if (info->name == NULL) {
+                free(info);
+                return NULL;
+        }
+
+        clock_gettime(CLOCK_REALTIME, &t);
+        srand(t.tv_nsec);
+
+        sprintf(info->name, "%8x",
+                (uint32_t)((rand() % RAND_MAX) & 0xFFFFFFFF));
+
+        info->addr = 0;
+
+        return info;
+}
+
+struct cacep_info * cacep_anonymous_auth(int                       fd,
+                                         const struct cacep_info * info)
+{
+        (void) fd;
+        (void) info;
+
+        return anonymous_info();
+}
+
+
+struct cacep_info * cacep_anonymous_auth_wait(int                       fd,
+                                              const struct cacep_info * info)
+{
+        (void) fd;
+        (void) info;
+
+        return anonymous_info();
+}