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fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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* Copyright (C) 2019-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <seastar/net/ipv4_address.hh>
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#include <seastar/net/ipv6_address.hh>
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#include "inet_address.hh"
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#include "serializer.hh"
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namespace ser {
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/**
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* Manual definition of inet_address serialization.
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* Because inet_address was initially hardcoded to
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* ipv4, its wire format is not very forward compatible.
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*
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* Since we potentially need to communicate with older
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* version nodes, we manually define the new serial format
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* for inet_address to be:
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*
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* ipv4: 4 bytes address
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* ipv6: 4 bytes marker 0xffffffff (invalid address)
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* 16 bytes data -> address
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*
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* As long as we are restricted to ipv4 (config/user responsibility)
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* we will be able to swap gossip with older nodes. Once the
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* cluster is fully updated, user can enable ipv6 and we will be
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* happy and addressing all the molecules.
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*
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*/
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template<>
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struct serializer<gms::inet_address> {
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template<typename Input>
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static gms::inet_address read(Input& in) {
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auto sz = deserialize(in, boost::type<uint32_t>());
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if (sz == std::numeric_limits<uint32_t>::max()) {
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seastar::net::ipv6_address addr(deserialize(in, boost::type<net::ipv6_address::ipv6_bytes>()));
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return gms::inet_address(addr);
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}
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return gms::inet_address(sz);
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}
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template<typename Output>
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static void write(Output& out, gms::inet_address v) {
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auto& addr = v.addr();
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if (addr.is_ipv6()) {
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serialize(out, std::numeric_limits<uint32_t>::max());
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auto bv = v.bytes();
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out.write(reinterpret_cast<const char *>(bv.data()), bv.size());
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} else {
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uint32_t ip = addr.as_ipv4_address().ip;
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// must write this little (or rather host) endian
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serialize(out, ip);
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}
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}
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template<typename Input>
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static void skip(Input& v) {
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read(v);
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}
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};
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}
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