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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.
*/
/**
* @file name.c
* @brief Implementation of hICN name helpers.
*/
#ifndef _WIN32
#include <arpa/inet.h> // inet_ptin
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h> // strtoul
#include <string.h> // memcpy
#include <hicn/common.h>
#include <hicn/error.h>
#include <hicn/name.h>
#include <hicn/util/sstrncpy.h>
int
hicn_name_create (const char *ip_address, u32 id, hicn_name_t *name)
{
int af, rc;
memset (name, 0, sizeof (hicn_name_t));
af = get_addr_family (ip_address);
int v4 = (af == AF_INET);
u8 *dst = (u8 *) (v4 * (intptr_t) (name->prefix.v4.as_u8) +
(1 - v4) * (intptr_t) (name->prefix.v6.as_u8));
rc = inet_pton (af, ip_address, dst);
if (rc != 1)
{
return HICN_LIB_ERROR_UNKNOWN_ADDRESS;
}
name->suffix = id;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_create_from_ip_prefix (const ip_prefix_t *prefix, u32 id,
hicn_name_t *name)
{
name->prefix.v6.as_u64[0] = prefix->address.v6.as_u64[0];
name->prefix.v6.as_u64[1] = prefix->address.v6.as_u64[1];
name->suffix = id;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_compare (const hicn_name_t *name_1, const hicn_name_t *name_2,
bool consider_segment)
{
int ret;
ret = memcmp (&name_1->prefix.v6.buffer, &name_2->prefix.v6.buffer,
sizeof (name_1->prefix.v6));
if (consider_segment)
ret |= !(name_1->suffix == name_2->suffix);
return ret;
}
int
hicn_name_hash (const hicn_name_t *name, u32 *hash, bool consider_suffix)
{
*hash = hash32 (&name->prefix, sizeof (name->prefix));
if (consider_suffix)
*hash = cumulative_hash32 (&name->suffix, sizeof (name->suffix), *hash);
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_empty (hicn_name_t *name)
{
return _is_unspec (name);
}
int
hicn_name_copy (hicn_name_t *dst, const hicn_name_t *src)
{
*dst = *src;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_copy_prefix_to_destination (u8 *dst, const hicn_name_t *name)
{
int v4 = _is_inet4 (name);
const u8 *src = (u8 *) (v4 * (intptr_t) (name->prefix.v4.as_u8) +
(1 - v4) * (intptr_t) (name->prefix.v6.as_u8));
size_t size = v4 * IPV4_ADDR_LEN + (1 - v4) * IPV6_ADDR_LEN;
memcpy (dst, src, size);
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_set_seq_number (hicn_name_t *name, u32 seq_number)
{
name->suffix = seq_number;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_to_sockaddr_address (const hicn_name_t *name,
struct sockaddr *ip_address)
{
struct sockaddr_in6 *tmp6 = (struct sockaddr_in6 *) ip_address;
struct sockaddr_in *tmp4 = (struct sockaddr_in *) ip_address;
assert (!_is_unspec (name));
if (_is_inet4 (name))
{
tmp4->sin_family = AF_INET;
tmp4->sin_port = DUMMY_PORT;
memcpy (&tmp4->sin_addr, &name->prefix.v4, IPV4_ADDR_LEN);
}
else
{
tmp6->sin6_family = AF_INET6;
tmp6->sin6_scope_id = 0;
tmp6->sin6_port = DUMMY_PORT;
memcpy (&tmp6->sin6_addr, &name->prefix.v6, IPV6_ADDR_LEN);
}
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_to_ip_prefix (const hicn_name_t *name, ip_prefix_t *prefix)
{
int family, rc;
rc = hicn_name_get_family (name, &family);
if (rc)
return rc;
prefix->family = family;
prefix->address.v6.as_u64[0] = name->prefix.v6.as_u64[0];
prefix->address.v6.as_u64[1] = name->prefix.v6.as_u64[1];
prefix->len = 128;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_get_seq_number (const hicn_name_t *name, u32 *seq_number)
{
*seq_number = name->suffix;
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_ntop (const hicn_name_t *src, char *dst, size_t len)
{
int offset;
const char *rc = NULL;
int v4 = _is_inet4 (src);
const u8 *addr = (u8 *) (v4 * (intptr_t) src->prefix.v4.as_u8 +
(1 - v4) * (intptr_t) src->prefix.v6.as_u8);
int family = v4 * AF_INET + (1 - v4) * AF_INET6;
rc = inet_ntop (family, addr, dst, (socklen_t) len);
if (!rc)
{
return HICN_LIB_ERROR_UNSPECIFIED;
}
offset = (int) strnlen_s (dst, len);
dst[offset] = '|';
snprintf (dst + offset + 1, len - offset - 1, "%lu",
(unsigned long) (src->suffix));
return HICN_LIB_ERROR_NONE;
}
int
hicn_name_pton (const char *src, hicn_name_t *dst)
{
return HICN_LIB_ERROR_NOT_IMPLEMENTED;
}
int
hicn_name_get_family (const hicn_name_t *name, int *family)
{
assert (!_is_unspec (name));
int v4 = _is_inet4 (name);
*family = v4 * AF_INET + (1 - v4) * AF_INET6;
return HICN_LIB_ERROR_NONE;
}
int
hicn_prefix_create_from_ip_prefix (const ip_prefix_t *ip_prefix,
hicn_prefix_t *prefix)
{
switch (ip_prefix->family)
{
case AF_INET:
prefix->name.v4.as_u32 = ip_prefix->address.v4.as_u32;
break;
case AF_INET6:
prefix->name.v6.as_u64[0] = ip_prefix->address.v6.as_u64[0];
prefix->name.v6.as_u64[1] = ip_prefix->address.v6.as_u64[1];
break;
default:
return HICN_LIB_ERROR_INVALID_IP_ADDRESS;
}
prefix->len = (u8) (ip_prefix->len);
return HICN_LIB_ERROR_NONE;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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