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lokinet/include/llarp/net.hpp

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#ifndef LLARP_NET_HPP
#define LLARP_NET_HPP
#include <llarp/address_info.hpp>
#include <llarp/net.h>
#include <functional>
#include <iostream>
#include "mem.hpp"
bool
operator==(const sockaddr& a, const sockaddr& b);
bool
operator==(const sockaddr_in& a, const sockaddr_in& b);
bool
operator==(const sockaddr_in6& a, const sockaddr_in6& b);
bool
operator<(const sockaddr_in6& a, const sockaddr_in6& b);
bool
operator<(const in6_addr& a, const in6_addr& b);
bool
operator==(const in6_addr& a, const in6_addr& b);
namespace llarp
{
struct Addr
{
sockaddr_in6 _addr;
sockaddr_in _addr4;
~Addr(){};
Addr(){};
Addr(const Addr& other)
{
memcpy(&_addr, &other._addr, sizeof(sockaddr_in6));
memcpy(&_addr4, &other._addr4, sizeof(sockaddr_in));
}
void
port(uint16_t port)
{
if(af() == AF_INET)
{
_addr4.sin_port = htons(port);
}
_addr.sin6_port = htons(port);
}
in6_addr*
addr6()
{
return (in6_addr*)&_addr.sin6_addr.s6_addr[0];
}
in_addr*
addr4()
{
return (in_addr*)&_addr.sin6_addr.s6_addr[12];
}
const in6_addr*
addr6() const
{
return (const in6_addr*)&_addr.sin6_addr.s6_addr[0];
}
const in_addr*
addr4() const
{
return (const in_addr*)&_addr.sin6_addr.s6_addr[12];
}
Addr(const AddressInfo& other)
{
memcpy(addr6(), other.ip.s6_addr, 16);
_addr.sin6_port = htons(other.port);
auto ptr = &_addr.sin6_addr.s6_addr[0];
// TODO: detect SIIT better
if(ptr[11] == 0xff && ptr[10] == 0xff && ptr[9] == 0 && ptr[8] == 0
&& ptr[7] == 0 && ptr[6] == 0 && ptr[5] == 0 && ptr[4] == 0
&& ptr[3] == 0 && ptr[2] == 0 && ptr[1] == 0 && ptr[0] == 0)
{
_addr4.sin_family = AF_INET;
_addr4.sin_port = htons(other.port);
_addr.sin6_family = AF_INET;
memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
}
else
_addr.sin6_family = AF_INET6;
}
Addr(const sockaddr_in& other)
{
llarp::Zero(&_addr, sizeof(sockaddr_in6));
_addr.sin6_family = AF_INET;
uint8_t* addrptr = _addr.sin6_addr.s6_addr;
uint16_t* port = &_addr.sin6_port;
// SIIT
memcpy(12 + addrptr, &((const sockaddr_in*)(&other))->sin_addr,
sizeof(in_addr));
addrptr[11] = 0xff;
addrptr[10] = 0xff;
*port = ((sockaddr_in*)(&other))->sin_port;
_addr4.sin_family = AF_INET;
_addr4.sin_port = *port;
memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
}
Addr(const sockaddr_in6& other)
{
memcpy(addr6(), other.sin6_addr.s6_addr, 16);
_addr.sin6_port = htons(other.sin6_port);
auto ptr = &_addr.sin6_addr.s6_addr[0];
// TODO: detect SIIT better
if(ptr[11] == 0xff && ptr[10] == 0xff && ptr[9] == 0 && ptr[8] == 0
&& ptr[7] == 0 && ptr[6] == 0 && ptr[5] == 0 && ptr[4] == 0
&& ptr[3] == 0 && ptr[2] == 0 && ptr[1] == 0 && ptr[0] == 0)
{
_addr4.sin_family = AF_INET;
_addr4.sin_port = htons(other.sin6_port);
_addr.sin6_family = AF_INET;
memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
}
else
_addr.sin6_family = AF_INET6;
}
Addr(const sockaddr& other)
{
llarp::Zero(&_addr, sizeof(sockaddr_in6));
_addr.sin6_family = other.sa_family;
uint8_t* addrptr = _addr.sin6_addr.s6_addr;
uint16_t* port = &_addr.sin6_port;
switch(other.sa_family)
{
case AF_INET:
// SIIT
memcpy(12 + addrptr, &((const sockaddr_in*)(&other))->sin_addr,
sizeof(in_addr));
addrptr[11] = 0xff;
addrptr[10] = 0xff;
*port = ((sockaddr_in*)(&other))->sin_port;
_addr4.sin_family = AF_INET;
_addr4.sin_port = *port;
memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
break;
case AF_INET6:
memcpy(addrptr, &((const sockaddr_in6*)(&other))->sin6_addr.s6_addr,
16);
*port = ((sockaddr_in6*)(&other))->sin6_port;
break;
// TODO : sockaddr_ll
default:
break;
}
}
friend std::ostream&
operator<<(std::ostream& out, const Addr& a)
{
char tmp[128] = {0};
const void* ptr = nullptr;
if(a.af() == AF_INET6)
{
out << "[";
ptr = a.addr6();
}
else
{
ptr = a.addr4();
}
#ifndef _MSC_VER
if(inet_ntop(a.af(), ptr, tmp, sizeof(tmp)))
#else
if(inet_ntop(a.af(), (void*)ptr, tmp, sizeof(tmp)))
#endif
{
out << tmp;
if(a.af() == AF_INET6)
out << "]";
}
return out << ":" << a.port();
}
operator const sockaddr*() const
{
if(af() == AF_INET)
return (const sockaddr*)&_addr4;
else
return (const sockaddr*)&_addr;
}
void
CopyInto(sockaddr* other) const
{
void *dst, *src;
in_port_t* ptr;
size_t slen;
switch(af())
{
case AF_INET:
dst = (void*)&((sockaddr_in*)other)->sin_addr.s_addr;
src = (void*)&_addr.sin6_addr.s6_addr[12];
ptr = &((sockaddr_in*)other)->sin_port;
slen = sizeof(in_addr);
break;
case AF_INET6:
dst = (void*)((sockaddr_in6*)other)->sin6_addr.s6_addr;
src = (void*)_addr.sin6_addr.s6_addr;
ptr = &((sockaddr_in6*)other)->sin6_port;
slen = sizeof(in6_addr);
break;
default:
return;
}
memcpy(dst, src, slen);
*ptr = htons(port());
other->sa_family = af();
}
int
af() const
{
return _addr.sin6_family;
}
uint16_t
port() const
{
return ntohs(_addr.sin6_port);
}
bool
operator<(const Addr& other) const
{
if(af() == AF_INET && other.af() == AF_INET)
return port() < other.port() || addr4()->s_addr < other.addr4()->s_addr;
else
return port() < other.port() || *addr6() < *other.addr6()
|| af() < other.af();
}
bool
operator==(const Addr& other) const
{
if(af() == AF_INET && other.af() == AF_INET)
return port() == other.port()
&& addr4()->s_addr == other.addr4()->s_addr;
else
return af() == other.af() && memcmp(addr6(), other.addr6(), 16) == 0
&& port() == other.port();
}
Addr&
operator=(const sockaddr& other)
{
llarp::Zero(&_addr, sizeof(sockaddr_in6));
_addr.sin6_family = other.sa_family;
uint8_t* addrptr = _addr.sin6_addr.s6_addr;
uint16_t* port = &_addr.sin6_port;
switch(other.sa_family)
{
case AF_INET:
// SIIT
memcpy(12 + addrptr, &((const sockaddr_in*)(&other))->sin_addr,
sizeof(in_addr));
addrptr[11] = 0xff;
addrptr[10] = 0xff;
*port = ((sockaddr_in*)(&other))->sin_port;
_addr4.sin_family = AF_INET;
_addr4.sin_port = *port;
memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
break;
case AF_INET6:
memcpy(addrptr, &((const sockaddr_in6*)(&other))->sin6_addr.s6_addr,
16);
*port = ((sockaddr_in6*)(&other))->sin6_port;
break;
// TODO : sockaddr_ll
default:
break;
}
return *this;
}
bool
sameAddr(const Addr& other) const
{
return memcmp(addr6(), other.addr6(), 16) == 0;
}
bool
operator!=(const Addr& other) const
{
return !(*this == other);
}
socklen_t
SockLen() const
{
if(af() == AF_INET)
return sizeof(sockaddr_in);
else
return sizeof(sockaddr_in6);
}
bool
isPrivate() const
{
in_addr_t addr = this->addr4()->s_addr;
unsigned byte = ntohl(addr);
unsigned byte1 = (byte >> 24) & 0xff;
unsigned byte2 = (0x00ff0000 & byte) >> 16;
return (byte1 == 10 || (byte1 == 192 && byte2 == 168)
|| (byte1 == 172 && (byte2 >= 16 || byte2 <= 31)));
}
bool
isLoopback() const
{
return (ntohl(addr4()->s_addr)) >> 24 == 127;
}
struct Hash
{
std::size_t
operator()(Addr const& a) const noexcept
{
if(a.af() == AF_INET)
{
return a.port() ^ a.addr4()->s_addr;
}
static const uint8_t empty[16] = {0};
return (a.af() + memcmp(a.addr6(), empty, 16)) ^ a.port();
}
};
};
bool
AllInterfaces(int af, Addr& addr);
/// get first network interface with public address
bool
GetBestNetIF(std::string& ifname, int af = AF_INET);
/// get network interface address for network interface with ifname
bool
GetIFAddr(const std::string& ifname, Addr& addr, int af = AF_INET);
} // namespace llarp
#endif
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