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//
//
// Copyright 2018 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
#include <grpc/support/port_platform.h>
#include "src/core/lib/resolver/server_address.h"
#include <string.h>
#include <algorithm>
#include <initializer_list>
#include <memory>
#include <util/generic/string.h>
#include <util/string/cast.h>
#include <utility>
#include <vector>
#include "y_absl/status/status.h"
#include "y_absl/status/statusor.h"
#include "y_absl/strings/str_cat.h"
#include "y_absl/strings/str_format.h"
#include "y_absl/strings/str_join.h"
#include "src/core/lib/address_utils/sockaddr_utils.h"
#include "src/core/lib/channel/channel_args.h"
// IWYU pragma: no_include <sys/socket.h>
namespace grpc_core {
//
// ServerAddressWeightAttribute
//
const char* ServerAddressWeightAttribute::kServerAddressWeightAttributeKey =
"server_address_weight";
//
// ServerAddress
//
ServerAddress::ServerAddress(
const grpc_resolved_address& address, const ChannelArgs& args,
std::map<const char*, std::unique_ptr<AttributeInterface>> attributes)
: address_(address), args_(args), attributes_(std::move(attributes)) {}
ServerAddress::ServerAddress(
const void* address, size_t address_len, const ChannelArgs& args,
std::map<const char*, std::unique_ptr<AttributeInterface>> attributes)
: args_(args), attributes_(std::move(attributes)) {
memcpy(address_.addr, address, address_len);
address_.len = static_cast<socklen_t>(address_len);
}
ServerAddress::ServerAddress(const ServerAddress& other)
: address_(other.address_), args_(other.args_) {
for (const auto& p : other.attributes_) {
attributes_[p.first] = p.second->Copy();
}
}
ServerAddress& ServerAddress::operator=(const ServerAddress& other) {
if (&other == this) {
return *this;
}
address_ = other.address_;
args_ = other.args_;
attributes_.clear();
for (const auto& p : other.attributes_) {
attributes_[p.first] = p.second->Copy();
}
return *this;
}
ServerAddress::ServerAddress(ServerAddress&& other) noexcept
: address_(other.address_),
args_(std::move(other.args_)),
attributes_(std::move(other.attributes_)) {}
ServerAddress& ServerAddress::operator=(ServerAddress&& other) noexcept {
address_ = other.address_;
args_ = std::move(other.args_);
attributes_ = std::move(other.attributes_);
return *this;
}
namespace {
int CompareAttributes(
const std::map<const char*,
std::unique_ptr<ServerAddress::AttributeInterface>>&
attributes1,
const std::map<const char*,
std::unique_ptr<ServerAddress::AttributeInterface>>&
attributes2) {
auto it2 = attributes2.begin();
for (auto it1 = attributes1.begin(); it1 != attributes1.end(); ++it1) {
// attributes2 has fewer elements than attributes1
if (it2 == attributes2.end()) return -1;
// compare keys
int retval = strcmp(it1->first, it2->first);
if (retval != 0) return retval;
// compare values
retval = it1->second->Cmp(it2->second.get());
if (retval != 0) return retval;
++it2;
}
// attributes1 has fewer elements than attributes2
if (it2 != attributes2.end()) return 1;
// equal
return 0;
}
} // namespace
int ServerAddress::Cmp(const ServerAddress& other) const {
if (address_.len > other.address_.len) return 1;
if (address_.len < other.address_.len) return -1;
int retval = memcmp(address_.addr, other.address_.addr, address_.len);
if (retval != 0) return retval;
retval = QsortCompare(args_, other.args_);
if (retval != 0) return retval;
return CompareAttributes(attributes_, other.attributes_);
}
const ServerAddress::AttributeInterface* ServerAddress::GetAttribute(
const char* key) const {
auto it = attributes_.find(key);
if (it == attributes_.end()) return nullptr;
return it->second.get();
}
// Returns a copy of the address with a modified attribute.
// If the new value is null, the attribute is removed.
ServerAddress ServerAddress::WithAttribute(
const char* key, std::unique_ptr<AttributeInterface> value) const {
ServerAddress address = *this;
if (value == nullptr) {
address.attributes_.erase(key);
} else {
address.attributes_[key] = std::move(value);
}
return address;
}
TString ServerAddress::ToString() const {
auto addr_str = grpc_sockaddr_to_string(&address_, false);
std::vector<TString> parts = {
addr_str.ok() ? addr_str.value() : addr_str.status().ToString(),
};
if (args_ != ChannelArgs()) {
parts.emplace_back(y_absl::StrCat("args=", args_.ToString()));
}
if (!attributes_.empty()) {
std::vector<TString> attrs;
attrs.reserve(attributes_.size());
for (const auto& p : attributes_) {
attrs.emplace_back(y_absl::StrCat(p.first, "=", p.second->ToString()));
}
parts.emplace_back(
y_absl::StrCat("attributes={", y_absl::StrJoin(attrs, ", "), "}"));
}
return y_absl::StrJoin(parts, " ");
}
TString ServerAddressWeightAttribute::ToString() const {
return y_absl::StrFormat("%d", weight_);
}
} // namespace grpc_core
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