1 files changed, 187 insertions, 0 deletions
diff --git a/src/ipcpd/unicast/pol/simple_pff.c b/src/ipcpd/unicast/pol/simple_pff.c
new file mode 100644
index 00000000..4338c53c
--- /dev/null
+++ b/src/ipcpd/unicast/pol/simple_pff.c
@@ -0,0 +1,187 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2019
+ *
+ * Simple PDU Forwarding Function
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * 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/.
+ */
+
+#define _POSIX_C_SOURCE 200112L
+
+#include "config.h"
+
+#include <ouroboros/hashtable.h>
+#include <ouroboros/errno.h>
+
+#include <assert.h>
+#include <pthread.h>
+
+#include "simple_pff.h"
+
+struct pff_i {
+        struct htable *  table;
+        pthread_rwlock_t lock;
+};
+
+struct pol_pff_ops simple_pff_ops = {
+        .create            = simple_pff_create,
+        .destroy           = simple_pff_destroy,
+        .lock              = simple_pff_lock,
+        .unlock            = simple_pff_unlock,
+        .add               = simple_pff_add,
+        .update            = simple_pff_update,
+        .del               = simple_pff_del,
+        .flush             = simple_pff_flush,
+        .nhop              = simple_pff_nhop,
+        .flow_state_change = NULL
+};
+
+struct pff_i * simple_pff_create(void)
+{
+        struct pff_i * tmp;
+
+        tmp = malloc(sizeof(*tmp));
+        if (tmp == NULL)
+                return NULL;
+
+        if (pthread_rwlock_init(&tmp->lock, NULL)) {
+                free(tmp);
+                return NULL;
+        }
+
+        tmp->table = htable_create(PFT_SIZE, false);
+        if (tmp->table == NULL) {
+                pthread_rwlock_destroy(&tmp->lock);
+                free(tmp);
+                return NULL;
+        }
+
+        return tmp;
+}
+
+void simple_pff_destroy(struct pff_i * pff_i)
+{
+        assert(pff_i);
+
+        htable_destroy(pff_i->table);
+
+        pthread_rwlock_destroy(&pff_i->lock);
+        free(pff_i);
+}
+
+void simple_pff_lock(struct pff_i * pff_i)
+{
+        pthread_rwlock_wrlock(&pff_i->lock);
+}
+
+void simple_pff_unlock(struct pff_i * pff_i)
+{
+        pthread_rwlock_unlock(&pff_i->lock);
+}
+
+int simple_pff_add(struct pff_i * pff_i,
+                   uint64_t       addr,
+                   int *          fd,
+                   size_t         len)
+{
+        int * val;
+
+        assert(pff_i);
+        assert(len > 0);
+
+        (void) len;
+
+        val = malloc(sizeof(*val));
+        if (val == NULL)
+                return -ENOMEM;
+
+        *val = fd[0];
+
+        if (htable_insert(pff_i->table, addr, val, 1)) {
+                free(val);
+                return -1;
+        }
+
+        return 0;
+}
+
+int simple_pff_update(struct pff_i * pff_i,
+                      uint64_t       addr,
+                      int *          fd,
+                      size_t         len)
+{
+        int * val;
+
+        assert(pff_i);
+        assert(len > 0);
+
+        (void) len;
+
+        val = malloc(sizeof(*val));
+        if (val == NULL)
+                return -ENOMEM;
+        *val = fd[0];
+
+        if (htable_delete(pff_i->table, addr)) {
+                free(val);
+                return -1;
+        }
+
+        if (htable_insert(pff_i->table, addr, val, 1)) {
+                free(val);
+                return -1;
+        }
+
+        return 0;
+}
+
+int simple_pff_del(struct pff_i * pff_i,
+                   uint64_t       addr)
+{
+        assert(pff_i);
+
+        if (htable_delete(pff_i->table, addr))
+                return -1;
+
+        return 0;
+}
+
+void simple_pff_flush(struct pff_i * pff_i)
+{
+        assert(pff_i);
+
+        htable_flush(pff_i->table);
+}
+
+int simple_pff_nhop(struct pff_i * pff_i,
+                    uint64_t       addr)
+{
+        void * j;
+        size_t len;
+        int    fd = -1;
+
+        assert(pff_i);
+
+        pthread_rwlock_rdlock(&pff_i->lock);
+
+        if (!htable_lookup(pff_i->table, addr, &j, &len))
+                fd = *((int *) j);
+
+        pthread_rwlock_unlock(&pff_i->lock);
+
+        return fd;
+}