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//===-- CommandObjectProtocolServer.cpp -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "CommandObjectProtocolServer.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/ProtocolServer.h"
#include "lldb/Host/Socket.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Utility/UriParser.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/FormatAdapters.h"
#include <string>
using namespace llvm;
using namespace lldb;
using namespace lldb_private;
#define LLDB_OPTIONS_mcp
#include "CommandOptions.inc"
class CommandObjectProtocolServerStart : public CommandObjectParsed {
public:
CommandObjectProtocolServerStart(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "protocol-server start",
"start protocol server",
"protocol-server start <protocol> [<connection>]") {
AddSimpleArgumentList(lldb::eArgTypeProtocol, eArgRepeatPlain);
AddSimpleArgumentList(lldb::eArgTypeConnectURL, eArgRepeatPlain);
}
~CommandObjectProtocolServerStart() override = default;
protected:
void DoExecute(Args &args, CommandReturnObject &result) override {
if (args.GetArgumentCount() < 1) {
result.AppendError("no protocol specified");
return;
}
llvm::StringRef protocol = args.GetArgumentAtIndex(0);
ProtocolServer *server = ProtocolServer::GetOrCreate(protocol);
if (!server) {
result.AppendErrorWithFormatv(
"unsupported protocol: {0}. Supported protocols are: {1}", protocol,
llvm::join(ProtocolServer::GetSupportedProtocols(), ", "));
return;
}
std::string connection_uri = "listen://[localhost]:0";
if (args.GetArgumentCount() >= 2)
connection_uri = args.GetArgumentAtIndex(1);
const char *connection_error =
"unsupported connection specifier, expected 'accept:///path' "
"or 'listen://[host]:port', got '{0}'.";
auto uri = lldb_private::URI::Parse(connection_uri);
if (!uri) {
result.AppendErrorWithFormatv(connection_error, connection_uri);
return;
}
std::optional<Socket::ProtocolModePair> protocol_and_mode =
Socket::GetProtocolAndMode(uri->scheme);
if (!protocol_and_mode || protocol_and_mode->second != Socket::ModeAccept) {
result.AppendErrorWithFormatv(connection_error, connection_uri);
return;
}
ProtocolServer::Connection connection;
connection.protocol = protocol_and_mode->first;
if (connection.protocol == Socket::SocketProtocol::ProtocolUnixDomain)
connection.name = uri->path;
else
connection.name = formatv(
"[{0}]:{1}", uri->hostname.empty() ? "0.0.0.0" : uri->hostname,
uri->port.value_or(0));
if (llvm::Error error = server->Start(connection)) {
result.AppendErrorWithFormatv("{0}", llvm::fmt_consume(std::move(error)));
return;
}
if (Socket *socket = server->GetSocket()) {
std::string address =
llvm::join(socket->GetListeningConnectionURI(), ", ");
result.AppendMessageWithFormatv(
"{0} server started with connection listeners: {1}", protocol,
address);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
}
};
class CommandObjectProtocolServerStop : public CommandObjectParsed {
public:
CommandObjectProtocolServerStop(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "protocol-server stop",
"stop protocol server",
"protocol-server stop <protocol>") {
AddSimpleArgumentList(lldb::eArgTypeProtocol, eArgRepeatPlain);
}
~CommandObjectProtocolServerStop() override = default;
protected:
void DoExecute(Args &args, CommandReturnObject &result) override {
if (args.GetArgumentCount() < 1) {
result.AppendError("no protocol specified");
return;
}
llvm::StringRef protocol = args.GetArgumentAtIndex(0);
ProtocolServer *server = ProtocolServer::GetOrCreate(protocol);
if (!server) {
result.AppendErrorWithFormatv(
"unsupported protocol: {0}. Supported protocols are: {1}", protocol,
llvm::join(ProtocolServer::GetSupportedProtocols(), ", "));
return;
}
if (llvm::Error error = server->Stop()) {
result.AppendErrorWithFormatv("{0}", llvm::fmt_consume(std::move(error)));
return;
}
}
};
class CommandObjectProtocolServerGet : public CommandObjectParsed {
public:
CommandObjectProtocolServerGet(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "protocol-server get",
"get protocol server connection information",
"protocol-server get <protocol>") {
AddSimpleArgumentList(lldb::eArgTypeProtocol, eArgRepeatPlain);
}
~CommandObjectProtocolServerGet() override = default;
protected:
void DoExecute(Args &args, CommandReturnObject &result) override {
if (args.GetArgumentCount() < 1) {
result.AppendError("no protocol specified");
return;
}
llvm::StringRef protocol = args.GetArgumentAtIndex(0);
ProtocolServer *server = ProtocolServer::GetOrCreate(protocol);
if (!server) {
result.AppendErrorWithFormatv(
"unsupported protocol: {0}. Supported protocols are: {1}", protocol,
llvm::join(ProtocolServer::GetSupportedProtocols(), ", "));
return;
}
Socket *socket = server->GetSocket();
if (!socket) {
result.AppendErrorWithFormatv("{0} server is not running", protocol);
return;
}
std::string address = llvm::join(socket->GetListeningConnectionURI(), ", ");
result.AppendMessageWithFormatv("{0} server connection listeners: {1}",
protocol, address);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
};
CommandObjectProtocolServer::CommandObjectProtocolServer(
CommandInterpreter &interpreter)
: CommandObjectMultiword(interpreter, "protocol-server",
"Start, stop, and query protocol servers.",
"protocol-server") {
LoadSubCommand("start", CommandObjectSP(new CommandObjectProtocolServerStart(
interpreter)));
LoadSubCommand("stop", CommandObjectSP(
new CommandObjectProtocolServerStop(interpreter)));
LoadSubCommand(
"get", CommandObjectSP(new CommandObjectProtocolServerGet(interpreter)));
}
CommandObjectProtocolServer::~CommandObjectProtocolServer() = default;
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