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Address.h
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Address.h
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#ifndef ADDRESS_H
#define ADDRESS_H
#include "crypto/AddressCalc.h"
#include "util/Assert.h"
#include "util/Bits.h"
#include "util/Endian.h"
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#define Address_KEY_SIZE 32
#define Address_NETWORK_ADDR_SIZE 8
#define Address_SEARCH_TARGET_SIZE 16
#define Address_SERIALIZED_SIZE 40
struct Address
{
union {
struct {
uint32_t three;
uint32_t four;
uint32_t one;
uint32_t two;
} ints;
uint8_t bytes[Address_SEARCH_TARGET_SIZE];
} ip6;
uint8_t key[Address_KEY_SIZE];
uint64_t networkAddress_be;
};
static inline uint32_t Address_getPrefix(struct Address* addr)
{
if (addr->ip6.ints.one == 0
&& addr->ip6.ints.two == 0
&& addr->ip6.ints.three == 0
&& addr->ip6.ints.four == 0)
{
AddressCalc_addressForPublicKey(addr->ip6.bytes, addr->key);
}
return Endian_bigEndianToHost32(addr->ip6.ints.one);
}
static inline uint32_t Address_prefixForSearchTarget(const uint8_t searchTarget[16])
{
uint32_t prefix_be;
memcpy(&prefix_be, &searchTarget[8], 4);
return Endian_bigEndianToHost32(prefix_be);
}
static inline void Address_serialize(uint8_t output[Address_SERIALIZED_SIZE],
const struct Address* addr)
{
memcpy(output, addr->key, Address_SERIALIZED_SIZE);
}
static inline void Address_parse(struct Address* addr,
const uint8_t input[Address_SERIALIZED_SIZE])
{
memset(addr->ip6.bytes, 0, 16);
memcpy(addr->key, input, Address_SERIALIZED_SIZE);
}
static inline bool Address_isSame(const struct Address* addr,
const struct Address* addr2)
{
return memcmp(addr->key, addr2->key, Address_SERIALIZED_SIZE) == 0;
}
static inline bool Address_isSameIp(const struct Address* addr,
const struct Address* addr2)
{
return memcmp(addr->key, addr2->key, Address_KEY_SIZE) == 0;
}
static inline bool Address_equalsSearchTarget(struct Address* addr,
const uint8_t searchTarget[Address_SEARCH_TARGET_SIZE])
{
Address_getPrefix(addr);
return memcmp(addr->ip6.bytes, searchTarget, Address_SEARCH_TARGET_SIZE);
}
static inline void Address_forKey(struct Address* out, const uint8_t key[Address_KEY_SIZE])
{
memcpy(out->key, key, Address_KEY_SIZE);
AddressCalc_addressForPublicKey(out->ip6.bytes, key);
}
static inline void Address_printNetworkAddress(uint8_t output[20], struct Address* input)
{
uint8_t addr[8];
memcpy(addr, &input->networkAddress_be, 8);
sprintf((char*)output, "%.2x%.2x.%.2x%.2x.%.2x%.2x.%.2x%.2x",
addr[0],
addr[1],
addr[2],
addr[3],
addr[4],
addr[5],
addr[6],
addr[7]);
}
static inline void Address_printIp(uint8_t output[40], struct Address* addr)
{
Address_getPrefix(addr);
sprintf((char*)output, "%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x",
addr->ip6.bytes[ 0],
addr->ip6.bytes[ 1],
addr->ip6.bytes[ 2],
addr->ip6.bytes[ 3],
addr->ip6.bytes[ 4],
addr->ip6.bytes[ 5],
addr->ip6.bytes[ 6],
addr->ip6.bytes[ 7],
addr->ip6.bytes[ 8],
addr->ip6.bytes[ 9],
addr->ip6.bytes[10],
addr->ip6.bytes[11],
addr->ip6.bytes[12],
addr->ip6.bytes[13],
addr->ip6.bytes[14],
addr->ip6.bytes[15]);
}
static inline void Address_print(uint8_t output[60], struct Address* addr)
{
Address_printIp(output, addr);
output[39] = '@';
Address_printNetworkAddress(output + 40, addr);
}
/**
* Detect a redundant (looping) route.
*
* @param addrA
* @param addrB
* @return 1 if addrA is a redundant version of addrB, -1 if addrB is a redundant version of
* addrA, 0 if neither is a redundant version of the other.
*/
static inline int Address_checkRedundantRoute(struct Address* addrA, struct Address* addrB)
{
if (addrA->networkAddress_be == addrB->networkAddress_be) {
return 0;
}
uint64_t addrANet = Endian_bigEndianToHost64(addrA->networkAddress_be);
uint64_t addrBNet = Endian_bigEndianToHost64(addrB->networkAddress_be);
#define Address_MASK(var) UINT64_MAX >> (64 - Bits_log264(var) + 1)
if (addrANet > addrBNet) {
uint64_t mask = Address_MASK(addrBNet);
return (addrANet & mask) == (addrBNet & mask);
} else {
uint64_t mask = Address_MASK(addrANet);
return !((addrANet & mask) == (addrBNet & mask));
}
#undef Address_MASK
}
#endif