summaryrefslogtreecommitdiff
path: root/src/ipcpd/unicast/pol
diff options
context:
space:
mode:
Diffstat (limited to 'src/ipcpd/unicast/pol')
-rw-r--r--src/ipcpd/unicast/pol/alternate_pff.c2
-rw-r--r--src/ipcpd/unicast/pol/hashtable.c222
-rw-r--r--src/ipcpd/unicast/pol/hashtable.h55
-rw-r--r--src/ipcpd/unicast/pol/simple_pff.c2
-rw-r--r--src/ipcpd/unicast/pol/tests/CMakeLists.txt1
-rw-r--r--src/ipcpd/unicast/pol/tests/hashtable_test.c129
6 files changed, 409 insertions, 2 deletions
diff --git a/src/ipcpd/unicast/pol/alternate_pff.c b/src/ipcpd/unicast/pol/alternate_pff.c
index 131bc2d7..36d8d513 100644
--- a/src/ipcpd/unicast/pol/alternate_pff.c
+++ b/src/ipcpd/unicast/pol/alternate_pff.c
@@ -24,7 +24,6 @@
#include "config.h"
-#include <ouroboros/hashtable.h>
#include <ouroboros/errno.h>
#include <ouroboros/list.h>
@@ -32,6 +31,7 @@
#include <assert.h>
#include <pthread.h>
+#include "hashtable.h"
#include "alternate_pff.h"
struct nhop {
diff --git a/src/ipcpd/unicast/pol/hashtable.c b/src/ipcpd/unicast/pol/hashtable.c
new file mode 100644
index 00000000..596219f3
--- /dev/null
+++ b/src/ipcpd/unicast/pol/hashtable.c
@@ -0,0 +1,222 @@
+/*
+ * 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/hashtable.h b/src/ipcpd/unicast/pol/hashtable.h
new file mode 100644
index 00000000..b6a36180
--- /dev/null
+++ b/src/ipcpd/unicast/pol/hashtable.h
@@ -0,0 +1,55 @@
+/*
+ * 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/.
+ */
+
+#ifndef OUROBOROS_HASHTABLE_H
+#define OUROBOROS_HASHTABLE_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+struct htable;
+
+/* Buckets is rounded up to the nearest power of 2 */
+struct htable * htable_create(uint64_t buckets,
+ bool hash_key);
+
+void htable_destroy(struct htable * table);
+
+void htable_flush(struct htable * table);
+
+/* Passes ownership of the block of memory */
+int htable_insert(struct htable * table,
+ uint64_t key,
+ void * val,
+ 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 htable_delete(struct htable * table,
+ uint64_t key);
+
+#endif /* OUROBOROS_HASHTABLE_H */
diff --git a/src/ipcpd/unicast/pol/simple_pff.c b/src/ipcpd/unicast/pol/simple_pff.c
index c34a4fdc..3d294d90 100644
--- a/src/ipcpd/unicast/pol/simple_pff.c
+++ b/src/ipcpd/unicast/pol/simple_pff.c
@@ -24,12 +24,12 @@
#include "config.h"
-#include <ouroboros/hashtable.h>
#include <ouroboros/errno.h>
#include <assert.h>
#include <pthread.h>
+#include "hashtable.h"
#include "simple_pff.h"
struct pff_i {
diff --git a/src/ipcpd/unicast/pol/tests/CMakeLists.txt b/src/ipcpd/unicast/pol/tests/CMakeLists.txt
index d0652533..86c2d948 100644
--- a/src/ipcpd/unicast/pol/tests/CMakeLists.txt
+++ b/src/ipcpd/unicast/pol/tests/CMakeLists.txt
@@ -18,6 +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
)
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/hashtable_test.c
new file mode 100644
index 00000000..f84fee63
--- /dev/null
+++ b/src/ipcpd/unicast/pol/tests/hashtable_test.c
@@ -0,0 +1,129 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2020
+ *
+ * Test of the hash table
+ *
+ * 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/.
+ */
+
+#include "hashtable.c"
+
+#include <stdio.h>
+
+#define HASHTABLE_SIZE 256
+#define INT_TEST 4
+
+int hashtable_test(int argc, char ** argv)
+{
+ struct htable * table;
+ int i;
+ int * j;
+ void * el;
+ size_t len;
+
+ (void) argc;
+ (void) argv;
+
+ table = htable_create(HASHTABLE_SIZE, true);
+ if (table == NULL) {
+ printf("Failed to create.\n");
+ return -1;
+ }
+
+ htable_destroy(table);
+
+ table = htable_create(HASHTABLE_SIZE, false);
+ if (table == NULL) {
+ printf("Failed to create.\n");
+ return -1;
+ }
+
+ for (i = 0; i < HASHTABLE_SIZE + INT_TEST + 2; i++) {
+ j = malloc(sizeof(*j));
+ if (j == NULL) {
+ printf("Failed to malloc.\n");
+ htable_destroy(table);
+ return -1;
+ }
+ *j = i;
+
+ if (htable_insert(table, i, (void *) j, 1)) {
+ printf("Failed to insert.\n");
+ htable_destroy(table);
+ free(j);
+ return -1;
+ }
+ }
+
+ if (htable_lookup(table, INT_TEST, &el, &len)) {
+ printf("Failed to lookup.\n");
+ htable_destroy(table);
+ return -1;
+ }
+
+ j = (int *) el;
+ if (*j != INT_TEST) {
+ printf("Lookup returned wrong value (%d != %d).\n",
+ INT_TEST, *j);
+ htable_destroy(table);
+ return -1;
+ }
+
+ if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
+ printf("Failed to lookup.\n");
+ htable_destroy(table);
+ return -1;
+ }
+
+ j = (int *) el;
+ if (*j != HASHTABLE_SIZE + INT_TEST) {
+ printf("Lookup returned wrong value (%d != %d).\n",
+ INT_TEST, *j);
+ htable_destroy(table);
+ return -1;
+ }
+
+ if (htable_delete(table, INT_TEST)) {
+ printf("Failed to delete.\n");
+ htable_destroy(table);
+ return -1;
+ }
+
+ if (htable_lookup(table, INT_TEST, &el, &len) == 0) {
+ printf("Failed to delete properly.\n");
+ htable_destroy(table);
+ return -1;
+ }
+
+ if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
+ printf("Failed to lookup after deletion.\n");
+ htable_destroy(table);
+ return -1;
+ }
+
+ j = (int *) el;
+ if (*j != HASHTABLE_SIZE + INT_TEST) {
+ printf("Lookup returned wrong value (%d != %d).\n",
+ INT_TEST, *j);
+ htable_destroy(table);
+ return -1;
+ }
+
+ htable_destroy(table);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 17:14:56 +0000