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