1 files changed, 105 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/hash_set.c b/VNFs/DPPD-PROX/hash_set.c
new file mode 100644
index 00000000..5ea93e96
--- /dev/null
+++ b/VNFs/DPPD-PROX/hash_set.c
@@ -0,0 +1,105 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// 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.
+*/
+
+#include <rte_hash_crc.h>
+#include <string.h>
+
+#include "prox_malloc.h"
+#include "prox_assert.h"
+#include "hash_set.h"
+
+#define HASH_SET_ALLOC_CHUNCK 1024
+#define HASH_SET_ALLOC_CHUNCK_MEM (sizeof(struct hash_set_entry) * 1024)
+
+struct hash_set_entry {
+	uint32_t              crc;
+	void                  *data;
+	size_t                len;
+	struct hash_set_entry *next;
+};
+
+struct hash_set {
+	uint32_t              n_buckets;
+	int                   socket_id;
+	struct hash_set_entry *alloc;
+	size_t                alloc_count;
+	struct hash_set_entry *mem[0];
+};
+
+static struct hash_set_entry *hash_set_alloc_entry(struct hash_set *hs)
+{
+	struct hash_set_entry *ret;
+
+	if (hs->alloc_count == 0) {
+		size_t mem_size = HASH_SET_ALLOC_CHUNCK *
+			sizeof(struct hash_set_entry);
+
+		hs->alloc = prox_zmalloc(mem_size, hs->socket_id);
+		hs->alloc_count = HASH_SET_ALLOC_CHUNCK;
+	}
+
+	ret = hs->alloc;
+	hs->alloc++;
+	hs->alloc_count--;
+	return ret;
+}
+
+struct hash_set *hash_set_create(uint32_t n_buckets, int socket_id)
+{
+	struct hash_set *ret;
+	size_t mem_size = sizeof(*ret) + sizeof(ret->mem[0]) * n_buckets;
+
+	ret = prox_zmalloc(mem_size, socket_id);
+	ret->n_buckets = n_buckets;
+	ret->socket_id = socket_id;
+
+	return ret;
+}
+
+void *hash_set_find(struct hash_set *hs, void *data, size_t len)
+{
+	uint32_t crc = rte_hash_crc(data, len, 0);
+
+	struct hash_set_entry *entry = hs->mem[crc % hs->n_buckets];
+
+	while (entry) {
+		if (entry->crc == crc && entry->len == len &&
+		    memcmp(entry->data, data, len) == 0)
+			return entry->data;
+		entry = entry->next;
+	}
+	return NULL;
+}
+
+void hash_set_add(struct hash_set *hs, void *data, size_t len)
+{
+	uint32_t crc = rte_hash_crc(data, len, 0);
+	struct hash_set_entry *new = hash_set_alloc_entry(hs);
+
+	new->data = data;
+	new->len = len;
+	new->crc = crc;
+
+	if (hs->mem[crc % hs->n_buckets]) {
+		struct hash_set_entry *entry = hs->mem[crc % hs->n_buckets];
+		while (entry->next)
+			entry = entry->next;
+		entry->next = new;
+	}
+	else {
+		hs->mem[crc % hs->n_buckets] = new;
+	}
+}