mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 14:46:12 -04:00
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/platform/service_address.h"
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#include <cstdint>
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#include <string>
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#include "absl/strings/string_view.h"
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#include "connections/implementation/proto/offline_wire_formats.pb.h"
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namespace nearby {
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namespace {
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constexpr absl::string_view kIpv6LoopbackAddress(
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1", 16);
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} // namespace
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void ServiceAddressToProto(
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const ServiceAddress& service_address,
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location::nearby::connections::ServiceAddress& proto) {
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proto.set_ip_address(std::string(service_address.address.begin(),
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service_address.address.end()));
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proto.set_port(service_address.port);
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}
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bool ServiceAddressFromProto(
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const location::nearby::connections::ServiceAddress& proto,
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ServiceAddress& service_address) {
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// Address must be either 4 or 16 bytes and port must be valid (1 to 65535).
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if ((proto.ip_address().size() != 16 && proto.ip_address().size() != 4) ||
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proto.port() <= 0 || proto.port() > 65535) {
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return false;
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}
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service_address.address = {proto.ip_address().begin(),
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proto.ip_address().end()};
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service_address.port = proto.port();
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return true;
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}
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bool ServiceAddress::IsLoopbackAddress() const {
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if (address.size() == 4) {
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// IPv4 loopback: 127.0.0.0/8
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return address[0] == 127;
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} else if (address.size() == 16) {
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// IPv6 loopback: ::1
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return absl::string_view(address.data(), address.size()) ==
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kIpv6LoopbackAddress;
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}
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return false;
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}
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bool ServiceAddress::IsLinkLocalAddress() const {
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if (address.size() == 4) {
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// IPv4 link-local: 169.254.0.0/16
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uint8_t b0 = static_cast<uint8_t>(address[0]);
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uint8_t b1 = static_cast<uint8_t>(address[1]);
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return b0 == 169 && b1 == 254;
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} else if (address.size() == 16) {
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// IPv6 link-local: fe80::/10
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uint8_t b0 = static_cast<uint8_t>(address[0]);
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uint8_t b1 = static_cast<uint8_t>(address[1]);
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return b0 == 0xfe && (b1 & 0xc0) == 0x80;
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}
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return false;
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}
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} // namespace nearby
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