ipcpd: Rename hashtable to pft

This makes the hashtable more tailored to a packet forwarding table
(PFT). In the end not much of a change was needed, but now it's clear
the pft maps a destination address to a list of (outgoing) fds.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

8 files changed, 347 insertions, 352 deletions

diff --git a/src/ipcpd/unicast/CMakeLists.txt b/src/ipcpd/unicast/CMakeLists.txt
index 192b6592..d6ec4a93 100644
--- a/src/ipcpd/unicast/CMakeLists.txt
+++ b/src/ipcpd/unicast/CMakeLists.txt
@@ -44,7 +44,7 @@ set(SOURCE_FILES
   routing.c
   psched.c
   # Add policies last
-  pol/hashtable.c
+  pol/pft.c
   pol/alternate_pff.c
   pol/flat.c
   pol/link_state.c
diff --git a/src/ipcpd/unicast/pol/alternate_pff.c b/src/ipcpd/unicast/pol/alternate_pff.c
index 36d8d513..80c93f0e 100644
--- a/src/ipcpd/unicast/pol/alternate_pff.c
+++ b/src/ipcpd/unicast/pol/alternate_pff.c
@@ -31,7 +31,7 @@
 #include <assert.h>
 #include <pthread.h>
 
-#include "hashtable.h"
+#include "pft.h"
 #include "alternate_pff.h"
 
 struct nhop {
@@ -45,7 +45,7 @@ struct addr {
 };
 
 struct pff_i {
-        struct htable *  table;
+        struct pft *     pft;
 
         struct list_head addrs;
 
@@ -86,11 +86,11 @@ static int add_addr(struct pff_i * pff_i,
 static void del_addr(struct pff_i * pff_i,
                      uint64_t       addr)
 {
-        struct list_head * pos = NULL;
-        struct list_head * n   = NULL;
+        struct list_head * p;
+        struct list_head * h;
 
-        list_for_each_safe(pos, n, &(pff_i->addrs)) {
-                struct addr * e = list_entry(pos, struct addr, next);
+        list_for_each_safe(p, h, &(pff_i->addrs)) {
+                struct addr * e = list_entry(p, struct addr, next);
                 if (e->addr == addr) {
                         list_del(&e->next);
                         free(e);
@@ -101,11 +101,11 @@ static void del_addr(struct pff_i * pff_i,
 
 static void del_addrs(struct pff_i * pff_i)
 {
-        struct list_head * pos = NULL;
-        struct list_head * n   = NULL;
+        struct list_head * p;
+        struct list_head * h;
 
-        list_for_each_safe(pos, n, &(pff_i->addrs)) {
-                struct addr * e = list_entry(pos, struct addr, next);
+        list_for_each_safe(p, h, &(pff_i->addrs)) {
+                struct addr * e = list_entry(p, struct addr, next);
                 list_del(&e->next);
                 free(e);
         }
@@ -113,11 +113,11 @@ static void del_addrs(struct pff_i * pff_i)
 
 static void del_nhops_down(struct pff_i * pff_i)
 {
-        struct list_head * pos = NULL;
-        struct list_head * n   = NULL;
+        struct list_head * p;
+        struct list_head * h;
 
-        list_for_each_safe(pos, n, &(pff_i->nhops_down)) {
-                struct nhop * e = list_entry(pos, struct nhop, next);
+        list_for_each_safe(p, h, &(pff_i->nhops_down)) {
+                struct nhop * e = list_entry(p, struct nhop, next);
                 list_del(&e->next);
                 free(e);
         }
@@ -126,11 +126,11 @@ static void del_nhops_down(struct pff_i * pff_i)
 static int del_nhop_down(struct pff_i * pff_i,
                          int            fd)
 {
-        struct list_head * pos = NULL;
-        struct list_head * n   = NULL;
+        struct list_head * p;
+        struct list_head * h;
 
-        list_for_each_safe(pos, n, &(pff_i->nhops_down)) {
-                struct nhop * e = list_entry(pos, struct nhop, next);
+        list_for_each_safe(p, h, &(pff_i->nhops_down)) {
+                struct nhop * e = list_entry(p, struct nhop, next);
                 if (e->fd == fd) {
                         list_del(&e->next);
                         free(e);
@@ -171,31 +171,31 @@ static bool nhops_down_has(struct pff_i * pff_i,
         return false;
 }
 
-static int add_to_htable(struct pff_i * pff_i,
-                         uint64_t       addr,
-                         int *          fd,
-                         size_t         len)
+static int add_to_pft(struct pff_i * pff_i,
+                      uint64_t       addr,
+                      int *          fd,
+                      size_t         len)
 {
-        int * val;
+        int * fds;
 
         assert(pff_i);
         assert(len > 0);
 
-        val = malloc(sizeof(*val) * (len + 1));
-        if (val == NULL)
+        fds = malloc(sizeof(*fds) * (len + 1));
+        if (fds == NULL)
                 goto fail_malloc;
 
-        memcpy(val, fd, len * sizeof(*val));
+        memcpy(fds, fd, len * sizeof(*fds));
         /* Put primary hop again at the end */
-        val[len] = val[0];
+        fds[len] = fds[0];
 
-        if (htable_insert(pff_i->table, addr, val, len))
+        if (pft_insert(pff_i->pft, addr, fds, len))
                 goto fail_insert;
 
         return 0;
 
  fail_insert:
-        free(val);
+        free(fds);
  fail_malloc:
         return -1;
 }
@@ -211,16 +211,16 @@ struct pff_i * alternate_pff_create(void)
         if (pthread_rwlock_init(&tmp->lock, NULL))
                 goto fail_lock;
 
-        tmp->table = htable_create(PFT_SIZE, false);
-        if (tmp->table == NULL)
-                goto fail_table;
+        tmp->pft = pft_create(PFT_SIZE, false);
+        if (tmp->pft == NULL)
+                goto fail_pft;
 
         list_head_init(&tmp->nhops_down);
         list_head_init(&tmp->addrs);
 
         return tmp;
 
- fail_table:
+ fail_pft:
         pthread_rwlock_destroy(&tmp->lock);
  fail_lock:
         free(tmp);
@@ -232,7 +232,7 @@ void alternate_pff_destroy(struct pff_i * pff_i)
 {
         assert(pff_i);
 
-        htable_destroy(pff_i->table);
+        pft_destroy(pff_i->pft);
         del_nhops_down(pff_i);
         del_addrs(pff_i);
         pthread_rwlock_destroy(&pff_i->lock);
@@ -257,11 +257,11 @@ int alternate_pff_add(struct pff_i * pff_i,
         assert(pff_i);
         assert(len > 0);
 
-        if (add_to_htable(pff_i, addr, fd, len))
+        if (add_to_pft(pff_i, addr, fd, len))
                 return -1;
 
         if (add_addr(pff_i, addr)) {
-                htable_delete(pff_i->table, addr);
+                pft_delete(pff_i->pft, addr);
                 return -1;
         }
 
@@ -276,10 +276,10 @@ int alternate_pff_update(struct pff_i * pff_i,
         assert(pff_i);
         assert(len > 0);
 
-        if (htable_delete(pff_i->table, addr))
+        if (pft_delete(pff_i->pft, addr))
                 return -1;
 
-        if (add_to_htable(pff_i, addr, fd, len))
+        if (add_to_pft(pff_i, addr, fd, len))
                 return -1;
 
         return 0;
@@ -292,7 +292,7 @@ int alternate_pff_del(struct pff_i * pff_i,
 
         del_addr(pff_i, addr);
 
-        if (htable_delete(pff_i->table, addr))
+        if (pft_delete(pff_i->pft, addr))
                 return -1;
 
         return 0;
@@ -302,7 +302,7 @@ void alternate_pff_flush(struct pff_i * pff_i)
 {
         assert(pff_i);
 
-        htable_flush(pff_i->table);
+        pft_flush(pff_i->pft);
 
         del_nhops_down(pff_i);
 
@@ -312,20 +312,20 @@ void alternate_pff_flush(struct pff_i * pff_i)
 int alternate_pff_nhop(struct pff_i * pff_i,
                        uint64_t       addr)
 {
-        int    fd = -1;
+        int    fd;
         size_t len;
-        void * el;
+        int *  fds;
 
         assert(pff_i);
 
         pthread_rwlock_rdlock(&pff_i->lock);
 
-        if (htable_lookup(pff_i->table, addr, &el, &len)) {
+        if (pft_lookup(pff_i->pft, addr, &fds, &len)) {
                 pthread_rwlock_unlock(&pff_i->lock);
                 return -1;
         }
 
-        fd = *((int *) el);
+        fd = *fds;
 
         pthread_rwlock_unlock(&pff_i->lock);
 
@@ -338,7 +338,6 @@ int alternate_flow_state_change(struct pff_i * pff_i,
 {
         struct list_head * pos = NULL;
         size_t             len;
-        void *             el;
         int *              fds;
         size_t             i;
         int                tmp;
@@ -361,13 +360,11 @@ int alternate_flow_state_change(struct pff_i * pff_i,
 
         list_for_each(pos, &pff_i->addrs) {
                 struct addr * e = list_entry(pos, struct addr, next);
-                if (htable_lookup(pff_i->table, e->addr, &el, &len)) {
+                if (pft_lookup(pff_i->pft, e->addr, &fds, &len)) {
                         pthread_rwlock_unlock(&pff_i->lock);
                         return -1;
                 }
 
-                fds = (int *) el;
-
                 if (up) {
                         /* It is using an alternate */
                         if (fds[len] == fd && fds[0] != fd) {
diff --git a/src/ipcpd/unicast/pol/hashtable.c b/src/ipcpd/unicast/pol/hashtable.c
deleted file mode 100644
index 596219f3..00000000
--- a/src/ipcpd/unicast/pol/hashtable.c
+++ /dev/null
@@ -1,222 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2020
- *
- * Hash table with integer keys with separate chaining on collisions
- *
- *    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/.
- */
-
-#if defined(__linux__) || defined(__CYGWIN__)
-#define _DEFAULT_SOURCE
-#endif
-
-#include <ouroboros/list.h>
-#include <ouroboros/errno.h>
-#include <ouroboros/hash.h>
-
-#include "hashtable.h"
-
-#include <assert.h>
-#include <string.h>
-
-struct htable_entry {
-        struct list_head next;
-        uint64_t         key;
-        void *           val;
-        size_t           len;
-};
-
-struct htable {
-        struct list_head * buckets;
-        bool               hash_key;
-        uint64_t           buckets_size;
-};
-
-struct htable * htable_create(uint64_t buckets,
-                              bool     hash_key)
-{
-        struct htable * tmp;
-        unsigned int i;
-
-        if (buckets == 0)
-                return NULL;
-
-        buckets--;
-        buckets |= buckets >> 1;
-        buckets |= buckets >> 2;
-        buckets |= buckets >> 4;
-        buckets |= buckets >> 8;
-        buckets |= buckets >> 16;
-        buckets |= buckets >> 32;
-        buckets++;
-
-        tmp = malloc(sizeof(*tmp));
-        if (tmp == NULL)
-                return NULL;
-
-        tmp->hash_key = hash_key;
-        tmp->buckets_size = buckets;
-
-        tmp->buckets = malloc(buckets * sizeof(*tmp->buckets));
-        if (tmp->buckets == NULL) {
-                free(tmp);
-                return NULL;
-        }
-
-        for (i = 0; i < buckets; i++)
-                list_head_init(&(tmp->buckets[i]));
-
-        return tmp;
-}
-
-void htable_destroy(struct htable * table)
-{
-        assert(table);
-        assert(table->buckets);
-
-        htable_flush(table);
-        free(table->buckets);
-        free(table);
-}
-
-void htable_flush(struct htable * table)
-{
-        unsigned int          i;
-        struct list_head *    pos = NULL;
-        struct list_head *    n = NULL;
-        struct htable_entry * entry;
-
-        assert(table);
-
-        for (i = 0; i < table->buckets_size; i++) {
-                list_for_each_safe(pos, n, &(table->buckets[i])) {
-                        entry = list_entry(pos, struct htable_entry, next);
-                        list_del(&entry->next);
-                        free(entry->val);
-                        free(entry);
-                }
-        }
-}
-
-static uint64_t hash(uint64_t key)
-{
-        void *   res;
-        uint64_t ret;
-        uint8_t  keys[4];
-
-        memcpy(keys, &key, 4);
-
-        mem_hash(HASH_MD5, &res, keys, 4);
-
-        ret = (* (uint64_t *) res);
-
-        free(res);
-
-        return ret;
-}
-
-static uint64_t calc_key(struct htable * table,
-                         uint64_t        key)
-{
-        if (table->hash_key)
-                key = hash(key);
-
-        return (key & (table->buckets_size - 1));
-}
-
-int htable_insert(struct htable * table,
-                  uint64_t        key,
-                  void *          val,
-                  size_t          len)
-{
-        struct htable_entry * entry;
-        uint64_t              lookup_key;
-        struct list_head *    pos = NULL;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each(pos, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key)
-                        return -1;
-        }
-
-        entry = malloc(sizeof(*entry));
-        if (entry == NULL)
-                return -ENOMEM;
-
-        entry->key = key;
-        entry->val = val;
-        entry->len = len;
-        list_head_init(&entry->next);
-
-        list_add(&entry->next, &(table->buckets[lookup_key]));
-
-        return 0;
-}
-
-int htable_lookup(struct htable * table,
-                  uint64_t        key,
-                  void **         val,
-                  size_t *        len)
-{
-        struct htable_entry * entry;
-        struct list_head *    pos = NULL;
-        uint64_t              lookup_key;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each(pos, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key) {
-                        *val = entry->val;
-                        *len = entry->len;
-                        return 0;
-                }
-        }
-
-        return -1;
-}
-
-int htable_delete(struct htable * table,
-                  uint64_t        key)
-{
-        struct htable_entry * entry;
-        uint64_t              lookup_key;
-        struct list_head *    pos = NULL;
-        struct list_head *    n = NULL;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each_safe(pos, n, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key) {
-                        list_del(&entry->next);
-                        free(entry->val);
-                        free(entry);
-                        return 0;
-                }
-        }
-
-        return -1;
-}
diff --git a/src/ipcpd/unicast/pol/pft.c b/src/ipcpd/unicast/pol/pft.c
new file mode 100644
index 00000000..924efbe1
--- /dev/null
+++ b/src/ipcpd/unicast/pol/pft.c
@@ -0,0 +1,222 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Packet forwarding table (PFT) with chaining on collisions
+ *
+ *    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/.
+ */
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#endif
+
+#include <ouroboros/list.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/hash.h>
+
+#include "pft.h"
+
+#include <assert.h>
+#include <string.h>
+
+/* store <len> output fds for dst addr */
+struct pft_entry {
+        struct list_head next;
+        uint64_t         dst;
+        int *            fds;
+        size_t           len;
+};
+
+struct pft {
+        struct list_head * buckets;
+        bool               hash_key;
+        uint64_t           buckets_size;
+};
+
+struct pft * pft_create(uint64_t buckets,
+                        bool     hash_key)
+{
+        struct pft * tmp;
+        unsigned int i;
+
+        if (buckets == 0)
+                return NULL;
+
+        buckets--;
+        buckets |= buckets >> 1;
+        buckets |= buckets >> 2;
+        buckets |= buckets >> 4;
+        buckets |= buckets >> 8;
+        buckets |= buckets >> 16;
+        buckets |= buckets >> 32;
+        buckets++;
+
+        tmp = malloc(sizeof(*tmp));
+        if (tmp == NULL)
+                return NULL;
+
+        tmp->hash_key = hash_key;
+        tmp->buckets_size = buckets;
+
+        tmp->buckets = malloc(buckets * sizeof(*tmp->buckets));
+        if (tmp->buckets == NULL) {
+                free(tmp);
+                return NULL;
+        }
+
+        for (i = 0; i < buckets; i++)
+                list_head_init(&(tmp->buckets[i]));
+
+        return tmp;
+}
+
+void pft_destroy(struct pft * pft)
+{
+        assert(pft);
+        assert(pft->buckets);
+
+        pft_flush(pft);
+        free(pft->buckets);
+        free(pft);
+}
+
+void pft_flush(struct pft * pft)
+{
+        unsigned int       i;
+        struct list_head * p;
+        struct list_head * h;
+        struct pft_entry * entry;
+
+        assert(pft);
+
+        for (i = 0; i < pft->buckets_size; i++) {
+                list_for_each_safe(p, h, &(pft->buckets[i])) {
+                        entry = list_entry(p, struct pft_entry, next);
+                        list_del(&entry->next);
+                        free(entry->fds);
+                        free(entry);
+                }
+        }
+}
+
+static uint64_t hash(uint64_t key)
+{
+        void *   res;
+        uint64_t ret;
+        uint8_t  keys[4];
+
+        memcpy(keys, &key, 4);
+
+        mem_hash(HASH_MD5, &res, keys, 4);
+
+        ret = (* (uint64_t *) res);
+
+        free(res);
+
+        return ret;
+}
+
+static uint64_t calc_key(struct pft * pft,
+                         uint64_t     dst)
+{
+        if (pft->hash_key)
+                dst = hash(dst);
+
+        return (dst & (pft->buckets_size - 1));
+}
+
+int pft_insert(struct pft * pft,
+               uint64_t     dst,
+               int *        fds,
+               size_t       len)
+{
+        struct pft_entry * entry;
+        uint64_t           lookup_key;
+        struct list_head * p;
+
+        assert(pft);
+
+        lookup_key = calc_key(pft, dst);
+
+        list_for_each(p, &(pft->buckets[lookup_key])) {
+                entry = list_entry(p, struct pft_entry, next);
+                if (entry->dst == dst)
+                        return -EPERM;
+        }
+
+        entry = malloc(sizeof(*entry));
+        if (entry == NULL)
+                return -ENOMEM;
+
+        entry->dst = dst;
+        entry->fds = fds;
+        entry->len = len;
+
+        list_add(&entry->next, &(pft->buckets[lookup_key]));
+
+        return 0;
+}
+
+int pft_lookup(struct pft * pft,
+               uint64_t     dst,
+               int **       fds,
+               size_t *     len)
+{
+        struct pft_entry * entry;
+        struct list_head * p;
+        uint64_t           lookup_key;
+
+        assert(pft);
+
+        lookup_key = calc_key(pft, dst);
+
+        list_for_each(p, &(pft->buckets[lookup_key])) {
+                entry = list_entry(p, struct pft_entry, next);
+                if (entry->dst == dst) {
+                        *fds = entry->fds;
+                        *len = entry->len;
+                        return 0;
+                }
+        }
+
+        return -1;
+}
+
+int pft_delete(struct pft * pft,
+               uint64_t     dst)
+{
+        struct pft_entry * entry;
+        uint64_t           lookup_key;
+        struct list_head * p;
+        struct list_head * h;
+
+        assert(pft);
+
+        lookup_key = calc_key(pft, dst);
+
+        list_for_each_safe(p, h, &(pft->buckets[lookup_key])) {
+                entry = list_entry(p, struct pft_entry, next);
+                if (entry->dst == dst) {
+                        list_del(&entry->next);
+                        free(entry->fds);
+                        free(entry);
+                        return 0;
+                }
+        }
+
+        return -1;
+}
diff --git a/src/ipcpd/unicast/pol/hashtable.h b/src/ipcpd/unicast/pol/pft.h
index b6a36180..aed4dba8 100644
--- a/src/ipcpd/unicast/pol/hashtable.h
+++ b/src/ipcpd/unicast/pol/pft.h
@@ -1,8 +1,8 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2020
  *
-* Hash table with integer keys with separate chaining on collisions
-  *
+ * Packet forwarding table (PFT) with chaining on collisions
+ *
  *    Dimitri Staessens <dimitri.staessens@ugent.be>
  *    Sander Vrijders   <sander.vrijders@ugent.be>
  *
@@ -20,36 +20,36 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
-#ifndef OUROBOROS_HASHTABLE_H
-#define OUROBOROS_HASHTABLE_H
+#ifndef OUROBOROS_PFT_H
+#define OUROBOROS_PFT_H
 
 #include <stdint.h>
 #include <stdbool.h>
 #include <stdlib.h>
 
-struct htable;
+struct pft;
 
 /* Buckets is rounded up to the nearest power of 2 */
-struct htable * htable_create(uint64_t buckets,
-                              bool     hash_key);
+struct pft * pft_create(uint64_t buckets,
+                        bool     hash_key);
 
-void            htable_destroy(struct htable * table);
+void         pft_destroy(struct pft * table);
 
-void            htable_flush(struct htable * table);
+void         pft_flush(struct pft * table);
 
 /* Passes ownership of the block of memory */
-int             htable_insert(struct htable * table,
-                              uint64_t        key,
-                              void *          val,
-                              size_t          len);
+int          pft_insert(struct pft * pft,
+                        uint64_t     dst,
+                        int *        fds,
+                        size_t       len);
 
 /* The block of memory returned is no copy */
-int             htable_lookup(struct htable * table,
-                              uint64_t        key,
-                              void **         val,
-                              size_t *        len);
+int          pft_lookup(struct pft * pft,
+                        uint64_t     dst,
+                        int **       fds,
+                        size_t *     len);
 
-int             htable_delete(struct htable * table,
-                              uint64_t        key);
+int          pft_delete(struct pft * pft,
+                        uint64_t     dst);
 
-#endif /* OUROBOROS_HASHTABLE_H */
+#endif /* OUROBOROS_PFT_H */
diff --git a/src/ipcpd/unicast/pol/simple_pff.c b/src/ipcpd/unicast/pol/simple_pff.c
index 3d294d90..c5780703 100644
--- a/src/ipcpd/unicast/pol/simple_pff.c
+++ b/src/ipcpd/unicast/pol/simple_pff.c
@@ -29,11 +29,11 @@
 #include <assert.h>
 #include <pthread.h>
 
-#include "hashtable.h"
+#include "pft.h"
 #include "simple_pff.h"
 
 struct pff_i {
-        struct htable *  table;
+        struct pft *  pft;
         pthread_rwlock_t lock;
 };
 
@@ -63,8 +63,8 @@ struct pff_i * simple_pff_create(void)
                 return NULL;
         }
 
-        tmp->table = htable_create(PFT_SIZE, false);
-        if (tmp->table == NULL) {
+        tmp->pft = pft_create(PFT_SIZE, false);
+        if (tmp->pft == NULL) {
                 pthread_rwlock_destroy(&tmp->lock);
                 free(tmp);
                 return NULL;
@@ -77,7 +77,7 @@ void simple_pff_destroy(struct pff_i * pff_i)
 {
         assert(pff_i);
 
-        htable_destroy(pff_i->table);
+        pft_destroy(pff_i->pft);
 
         pthread_rwlock_destroy(&pff_i->lock);
         free(pff_i);
@@ -98,21 +98,21 @@ int simple_pff_add(struct pff_i * pff_i,
                    int *          fd,
                    size_t         len)
 {
-        int * val;
+        int * fds;
 
         assert(pff_i);
         assert(len > 0);
 
         (void) len;
 
-        val = malloc(sizeof(*val));
-        if (val == NULL)
+        fds = malloc(sizeof(*fds));
+        if (fds == NULL)
                 return -ENOMEM;
 
-        *val = fd[0];
+        *fds = *fd;
 
-        if (htable_insert(pff_i->table, addr, val, 1)) {
-                free(val);
+        if (pft_insert(pff_i->pft, addr, fds, 1)) {
+                free(fds);
                 return -1;
         }
 
@@ -124,25 +124,26 @@ int simple_pff_update(struct pff_i * pff_i,
                       int *          fd,
                       size_t         len)
 {
-        int * val;
+        int * fds;
 
         assert(pff_i);
         assert(len > 0);
 
         (void) len;
 
-        val = malloc(sizeof(*val));
-        if (val == NULL)
+        fds = malloc(sizeof(*fds));
+        if (fds == NULL)
                 return -ENOMEM;
-        *val = fd[0];
 
-        if (htable_delete(pff_i->table, addr)) {
-                free(val);
+        *fds = *fd;
+
+        if (pft_delete(pff_i->pft, addr)) {
+                free(fds);
                 return -1;
         }
 
-        if (htable_insert(pff_i->table, addr, val, 1)) {
-                free(val);
+        if (pft_insert(pff_i->pft, addr, fds, 1)) {
+                free(fds);
                 return -1;
         }
 
@@ -154,7 +155,7 @@ int simple_pff_del(struct pff_i * pff_i,
 {
         assert(pff_i);
 
-        if (htable_delete(pff_i->table, addr))
+        if (pft_delete(pff_i->pft, addr))
                 return -1;
 
         return 0;
@@ -164,13 +165,13 @@ void simple_pff_flush(struct pff_i * pff_i)
 {
         assert(pff_i);
 
-        htable_flush(pff_i->table);
+        pft_flush(pff_i->pft);
 }
 
 int simple_pff_nhop(struct pff_i * pff_i,
                     uint64_t       addr)
 {
-        void * j;
+        int *  fds;
         size_t len;
         int    fd = -1;
 
@@ -178,8 +179,8 @@ int simple_pff_nhop(struct pff_i * pff_i,
 
         pthread_rwlock_rdlock(&pff_i->lock);
 
-        if (!htable_lookup(pff_i->table, addr, &j, &len))
-                fd = *((int *) j);
+        if (pft_lookup(pff_i->pft, addr, &fds, &len) == 0)
+                fd = *fds;
 
         pthread_rwlock_unlock(&pff_i->lock);
 
diff --git a/src/ipcpd/unicast/pol/tests/CMakeLists.txt b/src/ipcpd/unicast/pol/tests/CMakeLists.txt
index 86c2d948..34d80e8d 100644
--- a/src/ipcpd/unicast/pol/tests/CMakeLists.txt
+++ b/src/ipcpd/unicast/pol/tests/CMakeLists.txt
@@ -18,7 +18,7 @@ get_filename_component(PARENT_DIR ${PARENT_PATH} NAME)
 create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
   # Add new tests here
   graph_test.c
-  hashtable_test.c
+  pft_test.c
   )
 
 add_executable(${PARENT_DIR}_test EXCLUDE_FROM_ALL ${${PARENT_DIR}_tests})
diff --git a/src/ipcpd/unicast/pol/tests/hashtable_test.c b/src/ipcpd/unicast/pol/tests/pft_test.c
index f84fee63..4e23898b 100644
--- a/src/ipcpd/unicast/pol/tests/hashtable_test.c
+++ b/src/ipcpd/unicast/pol/tests/pft_test.c
@@ -20,110 +20,107 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
-#include "hashtable.c"
+#include "pft.c"
 
 #include <stdio.h>
 
-#define HASHTABLE_SIZE 256
+#define TBL_SIZE 256
 #define INT_TEST 4
 
-int hashtable_test(int argc, char ** argv)
+int pft_test(int     argc,
+             char ** argv)
 {
-        struct htable * table;
-        int             i;
-        int *           j;
-        void *          el;
-        size_t          len;
+        struct pft * pft;
+        int          i;
+        int *        j;
+        size_t       len;
 
         (void) argc;
         (void) argv;
 
-        table = htable_create(HASHTABLE_SIZE, true);
-        if (table == NULL) {
+        pft = pft_create(TBL_SIZE, true);
+        if (pft == NULL) {
                 printf("Failed to create.\n");
                 return -1;
         }
 
-        htable_destroy(table);
+        pft_destroy(pft);
 
-        table = htable_create(HASHTABLE_SIZE, false);
-        if (table == NULL) {
+        pft = pft_create(TBL_SIZE, false);
+        if (pft == NULL) {
                 printf("Failed to create.\n");
                 return -1;
         }
 
-        for (i = 0; i < HASHTABLE_SIZE + INT_TEST + 2; i++) {
+        for (i = 0; i < TBL_SIZE + INT_TEST + 2; i++) {
                 j = malloc(sizeof(*j));
                 if (j == NULL) {
                         printf("Failed to malloc.\n");
-                        htable_destroy(table);
+                        pft_destroy(pft);
                         return -1;
                 }
                 *j = i;
 
-                if (htable_insert(table, i, (void *) j, 1)) {
+                if (pft_insert(pft, i, j, 1)) {
                         printf("Failed to insert.\n");
-                        htable_destroy(table);
+                        pft_destroy(pft);
                         free(j);
                         return -1;
                 }
         }
 
-        if (htable_lookup(table, INT_TEST, &el, &len)) {
+        if (pft_lookup(pft, INT_TEST, &j, &len)) {
                 printf("Failed to lookup.\n");
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        j = (int *) el;
         if (*j != INT_TEST) {
                 printf("Lookup returned wrong value (%d != %d).\n",
                        INT_TEST, *j);
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
+        if (pft_lookup(pft, TBL_SIZE + INT_TEST, &j, &len)) {
                 printf("Failed to lookup.\n");
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        j = (int *) el;
-        if (*j != HASHTABLE_SIZE + INT_TEST) {
+        if (*j != TBL_SIZE + INT_TEST) {
                 printf("Lookup returned wrong value (%d != %d).\n",
                        INT_TEST, *j);
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        if (htable_delete(table, INT_TEST)) {
+        if (pft_delete(pft, INT_TEST)) {
                 printf("Failed to delete.\n");
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        if (htable_lookup(table, INT_TEST, &el, &len) == 0) {
+        if (pft_lookup(pft, INT_TEST, &j, &len) == 0) {
                 printf("Failed to delete properly.\n");
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
+        if (pft_lookup(pft, TBL_SIZE + INT_TEST, &j, &len)) {
                 printf("Failed to lookup after deletion.\n");
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        j = (int *) el;
-        if (*j != HASHTABLE_SIZE + INT_TEST) {
+        if (*j != TBL_SIZE + INT_TEST) {
                 printf("Lookup returned wrong value (%d != %d).\n",
                        INT_TEST, *j);
-                htable_destroy(table);
+                pft_destroy(pft);
                 return -1;
         }
 
-        htable_destroy(table);
+        pft_destroy(pft);
 
         return 0;
 }