Add IPv6 support

new cli options (RPC ones also apply to wallet):
  --p2p-bind-ipv6-address (default = "::")
  --p2p-bind-port-ipv6    (default same as ipv4 port for given nettype)
  --rpc-bind-ipv6-address (default = "::1")

  --p2p-use-ipv6          (default false)
  --rpc-use-ipv6          (default false)

  --p2p-require-ipv4      (default true, if ipv4 bind fails and this is
                           true, will not continue even if ipv6 bind
                           successful)
  --rpc-require-ipv4      (default true, description as above)

ipv6 addresses are to be specified as "[xx:xx:xx::xx:xx]:port" except
in the cases of the cli args for bind address.  For those the square
braces can be omitted.

1 files changed, 56 insertions, 0 deletions

diff --git a/contrib/epee/include/net/net_utils_base.h b/contrib/epee/include/net/net_utils_base.h
index fce01311c..5ae3e53b3 100644
--- a/contrib/epee/include/net/net_utils_base.h
+++ b/contrib/epee/include/net/net_utils_base.h
@@ -31,6 +31,7 @@
 
 #include <boost/uuid/uuid.hpp>
 #include <boost/asio/io_service.hpp>
+#include <boost/asio/ip/address_v6.hpp>
 #include <typeinfo>
 #include <type_traits>
 #include "enums.h"
@@ -154,6 +155,59 @@ namespace net_utils
 	inline bool operator>=(const ipv4_network_subnet& lhs, const ipv4_network_subnet& rhs) noexcept
 	{ return !lhs.less(rhs); }
 
+	class ipv6_network_address
+	{
+	protected:
+		boost::asio::ip::address_v6 m_address;
+		uint16_t m_port;
+
+	public:
+		ipv6_network_address()
+			: ipv6_network_address(boost::asio::ip::address_v6::loopback(), 0)
+		{}
+
+		ipv6_network_address(const boost::asio::ip::address_v6& ip, uint16_t port)
+			: m_address(ip), m_port(port)
+		{
+		}
+
+		bool equal(const ipv6_network_address& other) const noexcept;
+		bool less(const ipv6_network_address& other) const noexcept;
+		bool is_same_host(const ipv6_network_address& other) const noexcept
+		{ return m_address == other.m_address; }
+
+		boost::asio::ip::address_v6 ip() const noexcept { return m_address; }
+		uint16_t port() const noexcept { return m_port; }
+		std::string str() const;
+		std::string host_str() const;
+		bool is_loopback() const;
+		bool is_local() const;
+		static constexpr address_type get_type_id() noexcept { return address_type::ipv6; }
+		static constexpr zone get_zone() noexcept { return zone::public_; }
+		static constexpr bool is_blockable() noexcept { return true; }
+
+		static const uint8_t ID = 2;
+		BEGIN_KV_SERIALIZE_MAP()
+			boost::asio::ip::address_v6::bytes_type bytes = this_ref.m_address.to_bytes();
+			epee::serialization::selector<is_store>::serialize_t_val_as_blob(bytes, stg, hparent_section, "addr");
+			const_cast<boost::asio::ip::address_v6&>(this_ref.m_address) = boost::asio::ip::address_v6(bytes);
+			KV_SERIALIZE(m_port)
+		END_KV_SERIALIZE_MAP()
+	};
+
+	inline bool operator==(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return lhs.equal(rhs); }
+	inline bool operator!=(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return !lhs.equal(rhs); }
+	inline bool operator<(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return lhs.less(rhs); }
+	inline bool operator<=(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return !rhs.less(lhs); }
+	inline bool operator>(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return rhs.less(lhs); }
+	inline bool operator>=(const ipv6_network_address& lhs, const ipv6_network_address& rhs) noexcept
+	{ return !lhs.less(rhs); }
+
 	class network_address
 	{
 		struct interface
@@ -261,6 +315,8 @@ namespace net_utils
 			{
 				case address_type::ipv4:
 					return this_ref.template serialize_addr<ipv4_network_address>(is_store_, stg, hparent_section);
+				case address_type::ipv6:
+					return this_ref.template serialize_addr<ipv6_network_address>(is_store_, stg, hparent_section);
 				case address_type::tor:
 					return this_ref.template serialize_addr<net::tor_address>(is_store_, stg, hparent_section);
 				case address_type::i2p: