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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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 <assert.h>
#include <limits.h>
#include <hicn/hicn-light/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <hicn/common.h> // cumulative_hash32
#include <hicn/core/messageHandler.h>
#include <hicn/core/name.h>
#include <hicn/util/log.h>
#include <hicn/base/hash.h>
#define IPv6_TYPE 6
#define IPv4_TYPE 4
static uint32_t _computeHash(Name *name) {
assert(name);
uint32_t hash1 = nameBitvector_GetHash32(&(name->content_name));
return hashlittle(&name->segment, sizeof(name->segment), hash1);
}
// ============================================================================
void name_create_from_interest(const uint8_t *packet, Name *name) {
assert(packet);
assert(name);
if (messageHandler_GetIPPacketType(packet) == IPv6_TYPE) {
nameBitvector_CreateFromIn6Addr(
&(name->content_name),
(struct in6_addr *)messageHandler_GetDestination(packet), 128);
} else if (messageHandler_GetIPPacketType(packet) == IPv4_TYPE) {
nameBitvector_CreateFromInAddr(
&(name->content_name),
*((uint32_t *)messageHandler_GetDestination(packet)), 32);
} else {
ERROR("Error: unknown message type\n");
return;
}
name->segment = messageHandler_GetSegment(packet);
name->name_hash = _computeHash(name);
}
void name_create_from_data(const uint8_t *packet, Name *name) {
assert(packet);
assert(name);
if (messageHandler_GetIPPacketType(packet) == IPv6_TYPE) {
nameBitvector_CreateFromIn6Addr(
&(name->content_name),
(struct in6_addr *)messageHandler_GetSource(packet), 128);
} else if (messageHandler_GetIPPacketType(packet) == IPv4_TYPE) {
nameBitvector_CreateFromInAddr(
&(name->content_name), *((uint32_t *)messageHandler_GetSource(packet)),
32);
} else {
printf("Error: unknown message type\n");
return;
}
name->segment = messageHandler_GetSegment(packet);
name->name_hash = _computeHash(name);
}
void name_CreateFromAddress(Name *name, int family, ip_address_t addr,
uint8_t len) {
assert(name);
switch (family) {
case AF_INET:
nameBitvector_CreateFromInAddr(&(name->content_name), addr.v4.as_u32,
len);
break;
case AF_INET6:
nameBitvector_CreateFromIn6Addr(&(name->content_name),
&addr.v6.as_in6addr, len);
break;
default:
return;
}
name->segment = 0;
name->name_hash = _computeHash(name);
}
void name_Copy(const Name *original, Name *copy) {
assert(original);
assert(copy);
nameBitvector_Copy(&(original->content_name), &(copy->content_name));
copy->segment = original->segment;
copy->name_hash = original->name_hash;
}
uint32_t name_HashCode(const Name *name) {
assert(name);
return name->name_hash;
}
NameBitvector *name_GetContentName(const Name *name) {
assert(name);
return (NameBitvector *)&(name->content_name);
}
uint32_t name_GetSegment(const Name *name) {
assert(name);
return name->segment;
}
void name_SetSegment(Name *name, uint32_t segment) { name->segment = segment; }
bool name_Equals(const Name *a, const Name *b) {
assert(a);
assert(b);
if ((nameBitvector_Equals(&(a->content_name), &(b->content_name)) &&
a->segment == b->segment))
return true;
return false;
}
int name_Compare(const Name *a, const Name *b) {
assert(a);
assert(b);
if (a == NULL && b == NULL) {
return 0;
}
if (a == NULL) {
return -1;
}
if (b == NULL) {
return +1;
}
int res = nameBitvector_Compare(&(a->content_name), &(b->content_name));
if (res != 0) {
return res;
} else {
if (a->segment < b->segment) {
return -1;
} else if (a->segment > b->segment) {
return +1;
} else {
return 0;
}
}
}
char *name_ToString(const Name *name) {
char *output = malloc(NI_MAXHOST * 2);
address_t address;
nameBitvector_ToAddress(name_GetContentName(name), &address);
char addr_str[NI_MAXHOST];
int err = address_to_string(&address, addr_str, NULL);
_ASSERT(!err);
int chars_written =
snprintf(output, NI_MAXHOST * 2, "name=%s|%u", addr_str, name->segment);
_ASSERT(chars_written > 0);
return output;
}
void name_setLen(Name *name, uint8_t len) {
nameBitvector_setLen(&(name->content_name), len);
name->name_hash = _computeHash(name);
}
#ifdef WITH_POLICY
uint32_t name_GetSuffix(const Name *name) { return name->segment; }
uint8_t name_GetLen(const Name *name) {
return nameBitvector_GetLength(&(name->content_name));
}
#endif /* WITH_POLICY */
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