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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/webrtc_overrides/rtc_base/fake_socket_factory.h"
#include <cerrno>
#include <cstdint>
#include "base/check.h"
#include "base/check_op.h"
#include "third_party/webrtc/rtc_base/ip_address.h"
#include "third_party/webrtc/rtc_base/socket.h"
#include "third_party/webrtc/rtc_base/socket_address.h"
namespace blink {
namespace {
const uint16_t kFirstEphemeralPort = 49152;
const uint16_t kLastEphemeralPort = 65535;
const uint16_t kEphemeralPortCount =
kLastEphemeralPort - kFirstEphemeralPort + 1;
} // unnamed namespace
FakeSocket::FakeSocket(FakeSocketFactory* factory, int family, int type)
: factory_(factory), error_(0), state_(webrtc::Socket::CS_CLOSED) {}
webrtc::SocketAddress FakeSocket::GetLocalAddress() const {
return local_addr_;
}
webrtc::SocketAddress FakeSocket::GetRemoteAddress() const {
return remote_addr_;
}
int FakeSocket::Bind(const webrtc::SocketAddress& addr) {
if (!local_addr_.IsNil()) {
error_ = EINVAL;
return -1;
}
local_addr_ = factory_->AssignBindAddress(addr);
int result = factory_->Bind(this, local_addr_);
if (result != 0) {
local_addr_.Clear();
error_ = EADDRINUSE;
} else {
bound_ = true;
}
return result;
}
int FakeSocket::Close() {
if (!local_addr_.IsNil() && bound_) {
factory_->Unbind(local_addr_, this);
bound_ = false;
}
return 0;
}
int FakeSocket::GetError() const {
return error_;
}
void FakeSocket::SetError(int error) {
error_ = error;
}
webrtc::Socket::ConnState FakeSocket::GetState() const {
return state_;
}
FakeSocketFactory::FakeSocketFactory() : next_port_(kFirstEphemeralPort) {}
webrtc::Socket* FakeSocketFactory::CreateSocket(int family, int type) {
return new FakeSocket(this, family, type);
}
uint16_t FakeSocketFactory::GetNextPort() {
uint16_t port = next_port_;
if (next_port_ < kLastEphemeralPort) {
++next_port_;
} else {
next_port_ = kFirstEphemeralPort;
}
return port;
}
webrtc::SocketAddress FakeSocketFactory::AssignBindAddress(
const webrtc::SocketAddress& addr) {
DCHECK(!webrtc::IPIsUnspec(addr.ipaddr()));
webrtc::SocketAddress assigned_addr;
assigned_addr.SetIP(addr.ipaddr().Normalized());
if (addr.port() != 0) {
assigned_addr.SetPort(addr.port());
} else {
for (int i = 0; i < kEphemeralPortCount; ++i) {
assigned_addr.SetPort(GetNextPort());
if (bindings_.find(assigned_addr) == bindings_.end()) {
break;
}
}
}
return assigned_addr;
}
int FakeSocketFactory::Bind(FakeSocket* socket,
const webrtc::SocketAddress& addr) {
DCHECK_NE(socket, nullptr);
DCHECK(!webrtc::IPIsUnspec(addr.ipaddr()));
DCHECK_NE(addr.port(), 0);
webrtc::SocketAddress normalized(addr.ipaddr().Normalized(), addr.port());
AddressMap::value_type entry(normalized, socket);
return bindings_.insert(entry).second ? 0 : -1;
}
int FakeSocketFactory::Unbind(const webrtc::SocketAddress& addr,
FakeSocket* socket) {
webrtc::SocketAddress normalized(addr.ipaddr().Normalized(), addr.port());
DCHECK((bindings_)[normalized] == socket);
bindings_.erase(bindings_.find(normalized));
return 0;
}
} // namespace blink
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