tests: Add test for IPCPipeUnixSocket

Test the IPC functions of IPCPipeUnixSocket.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

test/ipc/meson.build

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: CC0-1.0
 
 ipc_tests = [
+    ['unixsocket_ipc', 'unixsocket_ipc.cpp'],
     ['unixsocket',     'unixsocket.cpp'],
 ]
 

test/ipc/unixsocket_ipc.cpp

@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * unixsocket_ipc.cpp - Unix socket IPC test
+ */
+
+#include <algorithm>
+#include <fcntl.h>
+#include <iostream>
+#include <limits.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "libcamera/internal/event_dispatcher.h"
+#include "libcamera/internal/ipa_data_serializer.h"
+#include "libcamera/internal/ipc_pipe.h"
+#include "libcamera/internal/ipc_pipe_unixsocket.h"
+#include "libcamera/internal/process.h"
+#include "libcamera/internal/thread.h"
+#include "libcamera/internal/timer.h"
+#include "libcamera/internal/utils.h"
+
+#include "test.h"
+
+
+using namespace std;
+using namespace libcamera;
+
+enum {
+	CmdExit = 0,
+	CmdGetSync = 1,
+	CmdSetAsync = 2,
+};
+
+const int32_t kInitialValue = 1337;
+const int32_t kChangedValue = 9001;
+
+class UnixSocketTestIPCSlave
+{
+public:
+	UnixSocketTestIPCSlave()
+		: value_(kInitialValue), exitCode_(EXIT_FAILURE), exit_(false)
+	{
+		dispatcher_ = Thread::current()->eventDispatcher();
+		ipc_.readyRead.connect(this, &UnixSocketTestIPCSlave::readyRead);
+	}
+
+	int run(int fd)
+	{
+		if (ipc_.bind(fd)) {
+			cerr << "Failed to connect to IPC channel" << endl;
+			return EXIT_FAILURE;
+		}
+
+		while (!exit_)
+			dispatcher_->processEvents();
+
+		ipc_.close();
+
+		return exitCode_;
+	}
+
+private:
+	void readyRead(IPCUnixSocket *ipc)
+	{
+		IPCUnixSocket::Payload message;
+		int ret;
+
+		ret = ipc->receive(&message);
+		if (ret) {
+			cerr << "Receive message failed: " << ret << endl;
+			return;
+		}
+
+		IPCMessage ipcMessage(message);
+		uint32_t cmd = ipcMessage.header().cmd;
+
+		switch (cmd) {
+		case CmdExit: {
+			exit_ = true;
+			break;
+		}
+
+		case CmdGetSync: {
+			IPCMessage::Header header = { cmd, ipcMessage.header().cookie };
+			IPCMessage response(header);
+
+			vector<uint8_t> buf;
+			tie(buf, ignore) = IPADataSerializer<int32_t>::serialize(value_);
+			response.data().insert(response.data().end(), buf.begin(), buf.end());
+
+			ret = ipc_.send(response.payload());
+			if (ret < 0) {
+				cerr << "Reply failed" << endl;
+				stop(ret);
+			}
+			break;
+		}
+
+		case CmdSetAsync: {
+			value_ = IPADataSerializer<int32_t>::deserialize(ipcMessage.data());
+			break;
+		}
+		}
+	}
+
+	void stop(int code)
+	{
+		exitCode_ = code;
+		exit_ = true;
+	}
+
+	int32_t value_;
+
+	IPCUnixSocket ipc_;
+	EventDispatcher *dispatcher_;
+	int exitCode_;
+	bool exit_;
+};
+
+class UnixSocketTestIPC : public Test
+{
+protected:
+	int init()
+	{
+		return 0;
+	}
+
+	int setValue(int32_t val)
+	{
+		IPCMessage msg(CmdSetAsync);
+		tie(msg.data(), ignore) = IPADataSerializer<int32_t>::serialize(val);
+
+		int ret = ipc_->sendAsync(msg);
+		if (ret < 0) {
+			cerr << "Failed to call set value" << endl;
+			return ret;
+		}
+
+		return 0;
+	}
+
+	int getValue()
+	{
+		IPCMessage msg(CmdGetSync);
+		IPCMessage buf;
+
+		int ret = ipc_->sendSync(msg, &buf);
+		if (ret < 0) {
+			cerr << "Failed to call get value" << endl;
+			return ret;
+		}
+
+		return IPADataSerializer<int32_t>::deserialize(buf.data());
+	}
+
+	int exit()
+	{
+		IPCMessage msg(CmdExit);
+
+		int ret = ipc_->sendAsync(msg);
+		if (ret < 0) {
+			cerr << "Failed to call exit" << endl;
+			return ret;
+		}
+
+		return 0;
+	}
+
+	int run()
+	{
+		ipc_ = std::make_unique<IPCPipeUnixSocket>("", "/proc/self/exe");
+		if (!ipc_->isConnected()) {
+			cerr << "Failed to create IPCPipe" << endl;
+			return TestFail;
+		}
+
+		int ret = getValue();
+		if (ret != kInitialValue) {
+			cerr << "Wrong initial value, expected "
+			     << kInitialValue << ", got " << ret << endl;
+			return TestFail;
+		}
+
+		ret = setValue(kChangedValue);
+		if (ret < 0) {
+			cerr << "Failed to set value: " << strerror(-ret) << endl;
+			return TestFail;
+		}
+
+		ret = getValue();
+		if (ret != kChangedValue) {
+			cerr << "Wrong set value, expected " << kChangedValue
+			     << ", got " << ret << endl;
+			return TestFail;
+		}
+
+		ret = exit();
+		if (ret < 0) {
+			cerr << "Failed to exit: " << strerror(-ret) << endl;
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+
+private:
+	ProcessManager processManager_;
+
+	unique_ptr<IPCPipeUnixSocket> ipc_;
+};
+
+/*
+ * Can't use TEST_REGISTER() as single binary needs to act as both client and
+ * server
+ */
+int main(int argc, char **argv)
+{
+	/* IPCPipeUnixSocket passes IPA module path in argv[1] */
+	if (argc == 3) {
+		int ipcfd = std::stoi(argv[2]);
+		UnixSocketTestIPCSlave slave;
+		return slave.run(ipcfd);
+	}
+
+	return UnixSocketTestIPC().execute();
+}