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/* Minimized/hacked up from openvswitch lib/conntrack.c, which had this license
header: */
/*
* Copyright (c) 2015-2019 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
typedef __SIZE_TYPE__ size_t;
#define NULL ((void *)0)
#define false 0
#define OBJECT_OFFSETOF(OBJECT, MEMBER)\
__builtin_offsetof(typeof(*(OBJECT)), MEMBER)
#define OBJECT_CONTAINING(POINTER, OBJECT, MEMBER) \
((typeof(OBJECT)) (void *) \
((char *) (POINTER) - OBJECT_OFFSETOF(OBJECT, MEMBER)))
#define ASSIGN_CONTAINER(OBJECT, POINTER, MEMBER) \
((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), (void) 0)
#define INIT_CONTAINER(OBJECT, POINTER, MEMBER) \
((OBJECT) = NULL, ASSIGN_CONTAINER(OBJECT, POINTER, MEMBER))
#define HMAP_FOR_EACH_POP(NODE, MEMBER, HMAP) \
for (size_t bucket__ = 0; \
INIT_CONTAINER(NODE, hmap_pop_helper__(HMAP, &bucket__), MEMBER), \
(NODE != OBJECT_CONTAINING(NULL, NODE, MEMBER)) \
|| ((NODE = NULL), false);)
struct hmap {
struct hmap_node **buckets;
struct hmap_node *one;
size_t mask;
size_t n;
};
struct hmap_node {
size_t hash;
struct hmap_node *next;
};
static inline void hmap_remove(struct hmap *, struct hmap_node *);
struct hmap_node *
hmap_pop_helper__(struct hmap *hmap, size_t *bucket) {
for (; *bucket <= hmap->mask; (*bucket)++) {
struct hmap_node *node = hmap->buckets[*bucket];
if (node) {
hmap_remove(hmap, node);
return node;
}
}
return NULL;
}
static inline void
hmap_remove(struct hmap *hmap, struct hmap_node *node)
{
struct hmap_node **bucket = &hmap->buckets[node->hash & hmap->mask];
while (*bucket != node) {
bucket = &(*bucket)->next;
}
*bucket = node->next;
hmap->n--;
}
struct conntrack {
struct hmap zone_limits;
};
struct zone_limit {
struct hmap_node node;
};
void
conntrack_destroy(struct conntrack *ct)
{
struct zone_limit *zl;
HMAP_FOR_EACH_POP (zl, node, &ct->zone_limits) {
__builtin_free(zl);
}
}
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