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Adam Ierymenko 2025-07-03 12:02:18 -04:00
parent 8b77ef538a
commit 342fa9d33f
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135 changed files with 42729 additions and 42439 deletions
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164
node/MulticastGroup.hpp
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@ -38,97 +38,97 @@ namespace ZeroTier {
*/
class MulticastGroup {
public:
MulticastGroup() : _mac(), _adi(0)
{
}
MulticastGroup() : _mac(), _adi(0)
{
}
MulticastGroup(const MAC& m, uint32_t a) : _mac(m), _adi(a)
{
}
MulticastGroup(const MAC& m, uint32_t a) : _mac(m), _adi(a)
{
}
/**
* Derive the multicast group used for address resolution (ARP/NDP) for an IP
*
* @param ip IP address (port field is ignored)
* @return Multicast group for ARP/NDP
*/
static inline MulticastGroup deriveMulticastGroupForAddressResolution(const InetAddress& ip)
{
if (ip.isV4()) {
// IPv4 wants broadcast MACs, so we shove the V4 address itself into
// the Multicast Group ADI field. Making V4 ARP work is basically why
// ADI was added, as well as handling other things that want mindless
// Ethernet broadcast to all.
return MulticastGroup(MAC(0xffffffffffffULL), Utils::ntoh(*((const uint32_t*)ip.rawIpData())));
}
else if (ip.isV6()) {
// IPv6 is better designed in this respect. We can compute the IPv6
// multicast address directly from the IP address, and it gives us
// 24 bits of uniqueness. Collisions aren't likely to be common enough
// to care about.
const unsigned char* a = (const unsigned char*)ip.rawIpData();
return MulticastGroup(MAC(0x33, 0x33, 0xff, a[13], a[14], a[15]), 0);
}
return MulticastGroup();
}
/**
* Derive the multicast group used for address resolution (ARP/NDP) for an IP
*
* @param ip IP address (port field is ignored)
* @return Multicast group for ARP/NDP
*/
static inline MulticastGroup deriveMulticastGroupForAddressResolution(const InetAddress& ip)
{
if (ip.isV4()) {
// IPv4 wants broadcast MACs, so we shove the V4 address itself into
// the Multicast Group ADI field. Making V4 ARP work is basically why
// ADI was added, as well as handling other things that want mindless
// Ethernet broadcast to all.
return MulticastGroup(MAC(0xffffffffffffULL), Utils::ntoh(*((const uint32_t*)ip.rawIpData())));
}
else if (ip.isV6()) {
// IPv6 is better designed in this respect. We can compute the IPv6
// multicast address directly from the IP address, and it gives us
// 24 bits of uniqueness. Collisions aren't likely to be common enough
// to care about.
const unsigned char* a = (const unsigned char*)ip.rawIpData();
return MulticastGroup(MAC(0x33, 0x33, 0xff, a[13], a[14], a[15]), 0);
}
return MulticastGroup();
}
/**
* @return Multicast address
*/
inline const MAC& mac() const
{
return _mac;
}
/**
* @return Multicast address
*/
inline const MAC& mac() const
{
return _mac;
}
/**
* @return Additional distinguishing information
*/
inline uint32_t adi() const
{
return _adi;
}
/**
* @return Additional distinguishing information
*/
inline uint32_t adi() const
{
return _adi;
}
inline unsigned long hashCode() const
{
return (_mac.hashCode() ^ (unsigned long)_adi);
}
inline unsigned long hashCode() const
{
return (_mac.hashCode() ^ (unsigned long)_adi);
}
inline bool operator==(const MulticastGroup& g) const
{
return ((_mac == g._mac) && (_adi == g._adi));
}
inline bool operator!=(const MulticastGroup& g) const
{
return ((_mac != g._mac) || (_adi != g._adi));
}
inline bool operator<(const MulticastGroup& g) const
{
if (_mac < g._mac) {
return true;
}
else if (_mac == g._mac) {
return (_adi < g._adi);
}
return false;
}
inline bool operator>(const MulticastGroup& g) const
{
return (g < *this);
}
inline bool operator<=(const MulticastGroup& g) const
{
return ! (g < *this);
}
inline bool operator>=(const MulticastGroup& g) const
{
return ! (*this < g);
}
inline bool operator==(const MulticastGroup& g) const
{
return ((_mac == g._mac) && (_adi == g._adi));
}
inline bool operator!=(const MulticastGroup& g) const
{
return ((_mac != g._mac) || (_adi != g._adi));
}
inline bool operator<(const MulticastGroup& g) const
{
if (_mac < g._mac) {
return true;
}
else if (_mac == g._mac) {
return (_adi < g._adi);
}
return false;
}
inline bool operator>(const MulticastGroup& g) const
{
return (g < *this);
}
inline bool operator<=(const MulticastGroup& g) const
{
return ! (g < *this);
}
inline bool operator>=(const MulticastGroup& g) const
{
return ! (*this < g);
}
private:
MAC _mac;
uint32_t _adi;
MAC _mac;
uint32_t _adi;
};
} // namespace ZeroTier
} // namespace ZeroTier
#endif