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/*
* Copyright (C) 2021 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <string>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include "vm_sockets.h"
namespace android {
class RpcSocketAddress {
public:
virtual ~RpcSocketAddress() {}
virtual std::string toString() const = 0;
virtual const sockaddr* addr() const = 0;
virtual size_t addrSize() const = 0;
};
class UnixSocketAddress : public RpcSocketAddress {
public:
explicit UnixSocketAddress(const char* path) : mAddr({.sun_family = AF_UNIX}) {
unsigned int pathLen = strlen(path) + 1;
LOG_ALWAYS_FATAL_IF(pathLen > sizeof(mAddr.sun_path), "Socket path is too long: %u %s",
pathLen, path);
memcpy(mAddr.sun_path, path, pathLen);
}
virtual ~UnixSocketAddress() {}
std::string toString() const override {
return String8::format("path '%.*s'", static_cast<int>(sizeof(mAddr.sun_path)),
mAddr.sun_path)
.c_str();
}
const sockaddr* addr() const override { return reinterpret_cast<const sockaddr*>(&mAddr); }
size_t addrSize() const override { return sizeof(mAddr); }
private:
sockaddr_un mAddr;
};
class VsockSocketAddress : public RpcSocketAddress {
public:
VsockSocketAddress(unsigned int cid, unsigned int port)
: mAddr({
.svm_family = AF_VSOCK,
.svm_port = port,
.svm_cid = cid,
}) {}
virtual ~VsockSocketAddress() {}
std::string toString() const override {
return String8::format("cid %u port %u", mAddr.svm_cid, mAddr.svm_port).c_str();
}
const sockaddr* addr() const override { return reinterpret_cast<const sockaddr*>(&mAddr); }
size_t addrSize() const override { return sizeof(mAddr); }
private:
sockaddr_vm mAddr;
};
class InetSocketAddress : public RpcSocketAddress {
public:
InetSocketAddress(const sockaddr* sockAddr, size_t size, const char* addr, unsigned int port)
: mSockAddr(sockAddr), mSize(size), mAddr(addr), mPort(port) {}
[[nodiscard]] std::string toString() const override {
return String8::format("%s:%u", mAddr, mPort).c_str();
}
[[nodiscard]] const sockaddr* addr() const override { return mSockAddr; }
[[nodiscard]] size_t addrSize() const override { return mSize; }
using AddrInfo = std::unique_ptr<addrinfo, decltype(&freeaddrinfo)>;
static AddrInfo getAddrInfo(const char* addr, unsigned int port) {
addrinfo hint{
.ai_flags = 0,
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_protocol = 0,
};
addrinfo* aiStart = nullptr;
if (int rc = getaddrinfo(addr, std::to_string(port).data(), &hint, &aiStart); 0 != rc) {
ALOGE("Unable to resolve %s:%u: %s", addr, port, gai_strerror(rc));
return AddrInfo(nullptr, nullptr);
}
if (aiStart == nullptr) {
ALOGE("Unable to resolve %s:%u: getaddrinfo returns null", addr, port);
return AddrInfo(nullptr, nullptr);
}
return AddrInfo(aiStart, &freeaddrinfo);
}
private:
const sockaddr* mSockAddr;
size_t mSize;
const char* mAddr;
unsigned int mPort;
};
} // namespace android
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