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/*
* Copyright (c) 2017-2019 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 common.c
* @brief Implementation of common interfaces abstracting low-level platform.
* details.
*/
#include <stdlib.h>
#include <string.h> // memset
#include <sys/types.h> // getaddrinfo
#include <sys/socket.h> // ''
#include <netdb.h> // ''
#include <stdio.h>
#include "common.h"
int
get_addr_family (const char *ip_address)
{
struct addrinfo hint, *res = NULL;
int rc;
memset (&hint, '\0', sizeof hint);
hint.ai_family = PF_UNSPEC;
hint.ai_flags = AI_NUMERICHOST;
rc = getaddrinfo (ip_address, NULL, &hint, &res);
if (rc)
{
return -1;
}
rc = res->ai_family;
freeaddrinfo (res);
return rc;
}
/* hashes */
u32
cumulative_hash32 (const void *data, size_t len, u32 lastValue)
{
// Standard FNV 32-bit prime: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
const u32 fnv1a_prime = 0x01000193;
u32 hash = lastValue;
size_t i;
const char *chardata = data;
for (i = 0; i < len; i++)
{
hash = hash ^ chardata[i];
hash = hash * fnv1a_prime;
}
return hash;
}
u32
hash32 (const void *data, size_t len)
{
// Standard FNV 32-bit offset: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
const u32 fnv1a_offset = 0x811C9DC5;
return cumulative_hash32 (data, len, fnv1a_offset);
}
u64
cumulative_hash64 (const void *data, size_t len, u64 lastValue)
{
// Standard FNV 64-bit prime: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
const u64 fnv1a_prime = 0x00000100000001B3ULL;
u64 hash = lastValue;
const char *chardata = data;
size_t i;
for (i = 0; i < len; i++)
{
hash = hash ^ chardata[i];
hash = hash * fnv1a_prime;
}
return hash;
}
u64
hash64 (const void *data, size_t len)
{
// Standard FNV 64-bit offset: see http://www.isthe.com/chongo/tech/comp/fnv/#FNV-param
const u64 fnv1a_offset = 0xCBF29CE484222325ULL;
return cumulative_hash64 (data, len, fnv1a_offset);
}
void
hicn_packet_dump (uint8_t * buffer, size_t len)
{
int i;
unsigned char buff[17];
unsigned char *pc = (unsigned char *) buffer;
// Output description if given.
if (len == 0)
{
printf (" ZERO LENGTH\n");
return;
}
// Process every byte in the data.
for (i = 0; i < len; i++)
{
// Multiple of 16 means new line (with line offset).
if ((i % 16) == 0)
{
// Just don't print ASCII for the zeroth line.
if (i != 0)
printf (" %s\n", buff);
// Output the offset.
printf (" %04x ", i);
}
// Now the hex code for the specific character.
printf (" %02x", pc[i]);
// And store a printable ASCII character for later.
if ((pc[i] < 0x20) || (pc[i] > 0x7e))
buff[i % 16] = '.';
else
buff[i % 16] = pc[i];
buff[(i % 16) + 1] = '\0';
}
// Pad out last line if not exactly 16 characters.
while ((i % 16) != 0)
{
printf (" ");
i++;
}
// And print the final ASCII bit.
printf (" %s\n", buff);
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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