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798 lines
19 KiB
C++
798 lines
19 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 "logger.hpp"
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#include "mem.hpp"
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#include <vector>
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#include <stdlib.h> // for itoa
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// for addrinfo
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#ifndef _WIN32
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#else
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <wspiapi.h>
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#define inet_aton(x, y) inet_pton(AF_INET, x, y)
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#endif
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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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struct privatesInUse
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{
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// true if used by real NICs on start
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// false if not used, and means we could potentially use it if needed
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bool ten; // 16m ips
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bool oneSeven; // 1m ips
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bool oneNine; // 65k ips
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};
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struct privatesInUse
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llarp_getPrivateIfs();
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namespace llarp
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{
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// clang-format off
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struct huint32_t
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{
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uint32_t h;
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constexpr huint32_t
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operator &(huint32_t x) const { return huint32_t{uint32_t(h & x.h)}; }
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constexpr huint32_t
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operator |(huint32_t x) const { return huint32_t{uint32_t(h | x.h)}; }
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constexpr huint32_t
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operator ^(huint32_t x) const { return huint32_t{uint32_t(h ^ x.h)}; }
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constexpr huint32_t
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operator ~() const { return huint32_t{uint32_t(~h)}; }
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inline huint32_t operator ++() { ++h; return *this; }
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inline huint32_t operator --() { --h; return *this; }
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constexpr bool operator <(huint32_t x) const { return h < x.h; }
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constexpr bool operator ==(huint32_t x) const { return h == x.h; }
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struct Hash
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{
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inline size_t
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operator ()(huint32_t x) const
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{
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return std::hash< uint32_t >{}(x.h);
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}
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};
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};
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struct nuint32_t
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{
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uint32_t n;
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constexpr nuint32_t
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operator &(nuint32_t x) const { return nuint32_t{uint32_t(n & x.n)}; }
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constexpr nuint32_t
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operator |(nuint32_t x) const { return nuint32_t{uint32_t(n | x.n)}; }
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constexpr nuint32_t
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operator ^(nuint32_t x) const { return nuint32_t{uint32_t(n ^ x.n)}; }
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constexpr nuint32_t
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operator ~() const { return nuint32_t{uint32_t(~n)}; }
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inline nuint32_t operator ++() { ++n; return *this; }
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inline nuint32_t operator --() { --n; return *this; }
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constexpr bool operator <(nuint32_t x) const { return n < x.n; }
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constexpr bool operator ==(nuint32_t x) const { return n == x.n; }
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struct Hash
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{
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inline size_t
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operator ()(nuint32_t x) const
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{
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return std::hash< uint32_t >{}(x.n);
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}
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};
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};
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struct huint16_t
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{
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uint16_t h;
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constexpr huint16_t
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operator &(huint16_t x) const { return huint16_t{uint16_t(h & x.h)}; }
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constexpr huint16_t
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operator |(huint16_t x) const { return huint16_t{uint16_t(h | x.h)}; }
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constexpr huint16_t
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operator ~() const { return huint16_t{uint16_t(~h)}; }
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inline huint16_t operator ++() { ++h; return *this; }
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inline huint16_t operator --() { --h; return *this; }
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constexpr bool operator <(huint16_t x) const { return h < x.h; }
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constexpr bool operator ==(huint16_t x) const { return h == x.h; }
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struct Hash
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{
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inline size_t
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operator ()(huint16_t x) const
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{
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return std::hash< uint16_t >{}(x.h);
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}
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};
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};
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struct nuint16_t
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{
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uint16_t n;
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constexpr nuint16_t
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operator &(nuint16_t x) const { return nuint16_t{uint16_t(n & x.n)}; }
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constexpr nuint16_t
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operator |(nuint16_t x) const { return nuint16_t{uint16_t(n | x.n)}; }
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constexpr nuint16_t
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operator ~() const { return nuint16_t{uint16_t(~n)}; }
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inline nuint16_t operator ++() { ++n; return *this; }
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inline nuint16_t operator --() { --n; return *this; }
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constexpr bool operator <(nuint16_t x) const { return n < x.n; }
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constexpr bool operator ==(nuint16_t x) const { return n == x.n; }
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struct Hash
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{
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inline size_t
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operator ()(nuint16_t x) const
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{
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return std::hash< uint16_t >{}(x.n);
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}
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};
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};
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// clang-format on
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static inline nuint32_t
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xhtonl(huint32_t x)
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{
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return nuint32_t{htonl(x.h)};
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}
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static inline huint32_t
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xntohl(nuint32_t x)
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{
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return huint32_t{ntohl(x.n)};
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}
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static inline nuint16_t
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xhtons(huint16_t x)
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{
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return nuint16_t{htons(x.h)};
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}
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static inline huint16_t
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xntohs(nuint16_t x)
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{
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return huint16_t{ntohs(x.n)};
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}
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struct IPRange
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{
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huint32_t addr;
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huint32_t netmask_bits;
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/// return true if ip is contained in this ip range
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bool
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Contains(const huint32_t& ip) const
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{
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// TODO: do this "better"
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return (addr & netmask_bits) == (ip & netmask_bits);
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}
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std::string
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ToString() const
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{
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char strbuf[32] = {0};
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char netbuf[32] = {0};
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inet_ntop(AF_INET, &addr, strbuf, sizeof(strbuf));
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inet_ntop(AF_INET, &netmask_bits, netbuf, sizeof(netbuf));
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return std::string(strbuf) + "/" + std::string(netbuf);
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}
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};
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/// get a netmask with the higest numset bits set
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constexpr uint32_t
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__netmask_ipv4_bits(uint32_t numset)
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{
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return (32 - numset)
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? (1 << (32 - (numset + 1))) | __netmask_ipv4_bits(numset + 1)
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: 0;
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}
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/// get an ipv4 netmask given some /N range
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constexpr huint32_t
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netmask_ipv4_bits(uint32_t num)
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{
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return huint32_t{__netmask_ipv4_bits(32 - num)};
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}
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constexpr huint32_t
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ipaddr_ipv4_bits(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
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{
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return huint32_t{(a) | (b << 8) | (c << 16) | (d << 24)};
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}
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constexpr IPRange
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iprange_ipv4(byte_t a, byte_t b, byte_t c, byte_t d, byte_t mask)
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{
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return IPRange{ipaddr_ipv4_bits(a, b, c, d), netmask_ipv4_bits(mask)};
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}
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bool
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IsIPv4Bogon(const huint32_t& addr);
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constexpr bool
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ipv6_is_siit(const in6_addr& addr)
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{
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return addr.s6_addr[11] == 0xff && addr.s6_addr[10] == 0xff
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&& addr.s6_addr[9] == 0 && addr.s6_addr[8] == 0 && addr.s6_addr[7] == 0
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&& addr.s6_addr[6] == 0 && addr.s6_addr[5] == 0 && addr.s6_addr[4] == 0
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&& addr.s6_addr[3] == 0 && addr.s6_addr[2] == 0 && addr.s6_addr[1] == 0
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&& addr.s6_addr[0] == 0;
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}
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bool
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IsBogon(const in6_addr& addr);
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bool
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IsBogonRange(const in6_addr& host, const in6_addr& mask);
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struct Addr
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{
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// network order
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sockaddr_in6 _addr;
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sockaddr_in _addr4; // why do we even have this? favor cpu over memory
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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 std::string str)
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{
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this->from_char_array(str.c_str());
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}
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Addr(const std::string str, const uint16_t p_port)
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{
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this->from_char_array(str.c_str());
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this->port(p_port);
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}
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bool
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from_char_array(const char* str)
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{
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llarp::Zero(&_addr, sizeof(sockaddr_in6));
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struct addrinfo hint, *res = NULL;
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int ret;
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memset(&hint, '\0', sizeof hint);
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hint.ai_family = PF_UNSPEC;
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hint.ai_flags = AI_NUMERICHOST;
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ret = getaddrinfo(str, NULL, &hint, &res);
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if(ret)
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{
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llarp::LogError("failed to determine address family: ", str);
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return false;
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}
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if(res->ai_family == AF_INET6)
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{
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llarp::LogError("IPv6 address not supported yet", str);
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return false;
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}
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else if(res->ai_family != AF_INET)
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{
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llarp::LogError("Address family not supported yet", str);
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return false;
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}
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// put it in _addr4
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struct in_addr* addr = &_addr4.sin_addr;
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if(inet_aton(str, addr) == 0)
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{
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llarp::LogError("failed to parse ", str);
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return false;
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}
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_addr.sin6_family = res->ai_family;
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_addr4.sin_family = res->ai_family;
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_addr4.sin_port = 0; // save a call, 0 is 0 no matter how u arrange it
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#if((__APPLE__ && __MACH__) || __FreeBSD__)
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_addr4.sin_len = sizeof(in_addr);
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#endif
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// set up SIIT
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uint8_t* addrptr = _addr.sin6_addr.s6_addr;
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addrptr[11] = 0xff;
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addrptr[10] = 0xff;
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memcpy(12 + addrptr, &addr->s_addr, sizeof(in_addr));
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freeaddrinfo(res);
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return true;
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}
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Addr(const char* str)
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{
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this->from_char_array(str);
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}
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bool
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from_4int(const uint8_t one, const uint8_t two, const uint8_t three,
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const uint8_t four)
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{
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llarp::Zero(&_addr, sizeof(sockaddr_in6));
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struct in_addr* addr = &_addr4.sin_addr;
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unsigned char* ip = (unsigned char*)&(addr->s_addr);
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_addr.sin6_family = AF_INET; // set ipv4 mode
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_addr4.sin_family = AF_INET;
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_addr4.sin_port = 0;
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#if((__APPLE__ && __MACH__) || __FreeBSD__)
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_addr4.sin_len = sizeof(in_addr);
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#endif
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// FIXME: watch endian
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ip[0] = one;
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ip[1] = two;
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ip[2] = three;
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ip[3] = four;
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// set up SIIT
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uint8_t* addrptr = _addr.sin6_addr.s6_addr;
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addrptr[11] = 0xff;
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addrptr[10] = 0xff;
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memcpy(12 + addrptr, &addr->s_addr, sizeof(in_addr));
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// copy ipv6 SIIT into _addr4
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memcpy(&_addr4.sin_addr.s_addr, addr4(), sizeof(in_addr));
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return true;
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}
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Addr(const uint8_t one, const uint8_t two, const uint8_t three,
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const uint8_t four)
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{
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this->from_4int(one, two, three, four);
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}
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Addr(const uint8_t one, const uint8_t two, const uint8_t three,
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const uint8_t four, const uint16_t p_port)
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{
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this->from_4int(one, two, three, four);
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this->port(p_port);
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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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if(ipv6_is_siit(other.ip))
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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;
|
|
break;
|
|
// TODO : sockaddr_ll
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
std::string
|
|
ToString() const
|
|
{
|
|
std::stringstream ss;
|
|
ss << (*this);
|
|
return std::string(ss.str().c_str());
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
operator sockaddr*() const
|
|
{
|
|
if(af() == AF_INET)
|
|
return (sockaddr*)&_addr4;
|
|
else
|
|
return (sockaddr*)&_addr;
|
|
}
|
|
|
|
void
|
|
CopyInto(sockaddr* other) const
|
|
{
|
|
void *dst, *src;
|
|
in_port_t* ptr;
|
|
size_t slen;
|
|
switch(af())
|
|
{
|
|
case AF_INET:
|
|
{
|
|
sockaddr_in* ipv4_dst = (sockaddr_in*)other;
|
|
dst = (void*)&ipv4_dst->sin_addr.s_addr;
|
|
src = (void*)&_addr4.sin_addr.s_addr;
|
|
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;
|
|
}
|
|
|
|
inline uint32_t
|
|
tohl() const
|
|
{
|
|
return ntohl(addr4()->s_addr);
|
|
}
|
|
|
|
inline huint32_t
|
|
xtohl() const
|
|
{
|
|
return huint32_t{ntohl(addr4()->s_addr)};
|
|
}
|
|
|
|
inline uint32_t
|
|
ton() const
|
|
{
|
|
return addr4()->s_addr;
|
|
}
|
|
|
|
inline nuint32_t
|
|
xtonl() const
|
|
{
|
|
return nuint32_t{addr4()->s_addr};
|
|
}
|
|
|
|
bool
|
|
sameAddr(const Addr& other) const
|
|
{
|
|
return memcmp(addr6(), other.addr6(), 16) == 0;
|
|
}
|
|
|
|
bool
|
|
operator!=(const Addr& other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
|
|
inline uint32_t
|
|
getHostLong()
|
|
{
|
|
in_addr_t addr = this->addr4()->s_addr;
|
|
uint32_t byte = ntohl(addr);
|
|
return byte;
|
|
};
|
|
|
|
bool
|
|
isTenPrivate(uint32_t byte)
|
|
{
|
|
uint8_t byte1 = byte >> 24 & 0xff;
|
|
return byte1 == 10;
|
|
}
|
|
|
|
bool
|
|
isOneSevenPrivate(uint32_t byte)
|
|
{
|
|
uint8_t byte1 = byte >> 24 & 0xff;
|
|
uint8_t byte2 = (0x00ff0000 & byte) >> 16;
|
|
return byte1 == 172 && (byte2 >= 16 || byte2 <= 31);
|
|
}
|
|
|
|
bool
|
|
isOneNinePrivate(uint32_t byte)
|
|
{
|
|
uint8_t byte1 = byte >> 24 & 0xff;
|
|
uint8_t byte2 = (0x00ff0000 & byte) >> 16;
|
|
return byte1 == 192 && byte2 == 168;
|
|
}
|
|
|
|
/// return true if our ipv4 address is a bogon
|
|
/// TODO: ipv6
|
|
bool
|
|
IsBogon() const
|
|
{
|
|
return IsIPv4Bogon(xtohl());
|
|
}
|
|
|
|
socklen_t
|
|
SockLen() const
|
|
{
|
|
if(af() == AF_INET)
|
|
return sizeof(sockaddr_in);
|
|
else
|
|
return sizeof(sockaddr_in6);
|
|
}
|
|
|
|
bool
|
|
isPrivate() const
|
|
{
|
|
return IsBogon();
|
|
}
|
|
|
|
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();
|
|
}
|
|
};
|
|
}; // namespace llarp
|
|
|
|
bool
|
|
AllInterfaces(int af, Addr& addr);
|
|
|
|
/// get first network interface with public address
|
|
bool
|
|
GetBestNetIF(std::string& ifname, int af = AF_INET);
|
|
|
|
/// look at adapter ranges and find a free one
|
|
std::string
|
|
findFreePrivateRange();
|
|
|
|
/// look at adapter names and find a free one
|
|
std::string
|
|
findFreeLokiTunIfName();
|
|
|
|
/// get network interface address for network interface with ifname
|
|
bool
|
|
GetIFAddr(const std::string& ifname, Addr& addr, int af = AF_INET);
|
|
|
|
} // namespace llarp
|
|
|
|
#endif
|