diff --git a/lesson_03/ap/ap.cpp b/lesson_03/ap/ap.cpp
new file mode 100644
index 0000000..b385274
--- /dev/null
+++ b/lesson_03/ap/ap.cpp
@@ -0,0 +1,136 @@
+/*
+ * ap.cpp
+ *
+ *  Created on: 05 сен. 2022 г.
+ *      Author: alexander
+ */
+
+#include <ap.hpp>
+
+namespace ap
+{
+
+ConfigOption::ConfigOption(const std::string &longParameter, const char shortParameter, const hasArg ha) :
+        _longParameter(nullptr), _shortParameter(shortParameter), _ha(ha)
+{
+    _longParameter = new char[longParameter.length() + 1];
+    strcpy(_longParameter, longParameter.c_str());
+}
+
+const char* ConfigOption::getLongParameter() const
+{
+    return _longParameter;
+}
+
+const char& ConfigOption::getShortParameter() const
+{
+    return _shortParameter;
+}
+
+const hasArg& ConfigOption::getPresenceArgument() const
+{
+    return _ha;
+}
+
+Option::Option() : _set(false)
+{
+}
+
+void Option::set()
+{
+	_set = true;
+}
+
+void Option::push(const std::string &value)
+{
+    _values.push_back(value);
+}
+
+std::vector<std::string>& Option::getValues()
+{
+	return _values;
+}
+
+bool Option::isSet() const
+{
+	return _set;
+}
+
+void Hub::_createArguments(const std::vector<ConfigOption> &options, bool silence)
+{
+    _longOptions = new struct option[options.size() + 1];
+    _sizeOptions = options.size();
+    std::string temp;
+    if (silence)
+        temp.push_back(':');
+    for (auto const &opt : options | boost::adaptors::indexed(0))
+    {
+        _longOptions[opt.index()].name = opt.value().getLongParameter();
+        _longOptions[opt.index()].has_arg = opt.value().getPresenceArgument();
+        _longOptions[opt.index()].flag = nullptr;
+        _longOptions[opt.index()].val = opt.value().getShortParameter();
+
+        temp.push_back(opt.value().getShortParameter());
+        switch (opt.value().getPresenceArgument())
+        {
+        case hasArg::OPTIONAL:
+            temp.push_back(':');
+            /* no break */
+        case hasArg::REQUIRED:
+            temp.push_back(':');
+            break;
+        case hasArg::NO:
+            break;
+        }
+
+        _arguments[opt.value().getShortParameter()].first = false;
+    }
+
+    _longOptions[options.size()].name = nullptr;
+    _longOptions[options.size()].has_arg = 0;
+    _longOptions[options.size()].flag = nullptr;
+    _longOptions[options.size()].val = 0;
+
+    _shortOptions = new char[temp.size() + 1];
+    strcpy(_shortOptions, temp.c_str());
+}
+
+Hub::Hub(const std::vector<ConfigOption> &options, bool silence) :
+        _longOptions(nullptr), _shortOptions(nullptr)
+{
+    _createArguments(options, silence);
+}
+
+void Hub::readArguments(int argc, char *argv[], void (*_callback)())
+{
+    int next_option;
+    while ((next_option = getopt_long(argc, argv, _shortOptions, _longOptions, nullptr)) != -1)
+    {
+        if (_arguments.count(next_option))
+        {
+            _arguments[next_option].first = true;
+            _arguments[next_option].second.set();
+            if (optarg)
+                _arguments[next_option].second.push(std::string(optarg));
+        }
+        if (next_option == '?' && _callback)
+            _callback();
+    }
+}
+
+Option Hub::getOption(char key) const
+{
+    return _arguments.count(key) && _arguments.at(key).first ? _arguments.at(key).second : Option();
+}
+
+Hub::~Hub()
+{
+    delete[] _shortOptions;
+    for (size_t i = 0; i < _sizeOptions; ++i)
+	{
+    	delete[] _longOptions[i].name;
+	}
+    delete[] _longOptions;
+}
+
+}
diff --git a/lesson_03/ap/ap.hpp b/lesson_03/ap/ap.hpp
new file mode 100644
index 0000000..8ae0de8
--- /dev/null
+++ b/lesson_03/ap/ap.hpp
@@ -0,0 +1,68 @@
+/*
+ * ap.hpp
+ *
+ *  Created on: 05 сен. 2022 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <getopt.h>
+#include <vector>
+#include <string>
+#include <cstring>
+#include <map>
+#include <boost/range/adaptors.hpp>
+
+namespace ap
+{
+
+enum hasArg
+{
+    NO, REQUIRED, OPTIONAL
+};
+
+typedef std::vector<std::string> (*_handler)(const std::vector<std::string>&);
+
+class ConfigOption
+{
+private:
+    char *_longParameter;
+    const char _shortParameter;
+    const hasArg _ha;
+public:
+    ConfigOption(const std::string &longParameter, const char shortParameter, const hasArg ha);
+    const char* getLongParameter() const;
+    const char& getShortParameter() const;
+    const hasArg& getPresenceArgument() const;
+};
+
+class Option
+{
+private:
+    std::vector<std::string> _values;
+    bool _set;
+public:
+    Option();
+    void push(const std::string &value);
+    std::vector<std::string>& getValues();
+    void set();
+    bool isSet() const;
+};
+
+class Hub
+{
+private:
+    struct option *_longOptions;
+    size_t _sizeOptions;
+    char *_shortOptions;
+    std::map<char, std::pair<bool, Option>> _arguments;
+    void _createArguments(const std::vector<ConfigOption> &options, bool silence);
+public:
+    Hub(const std::vector<ConfigOption> &options, bool silence = true);
+    void readArguments(int argc, char *argv[], void (*_callback)() = nullptr);
+    Option getOption(char key) const;
+    ~Hub();
+};
+
+}
diff --git a/lesson_03/header/address.hpp b/lesson_03/header/address.hpp
new file mode 100644
index 0000000..4fdf301
--- /dev/null
+++ b/lesson_03/header/address.hpp
@@ -0,0 +1,28 @@
+/*
+ * address.hpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <netinet/in.h>
+#include <string.h>
+
+namespace zh {
+
+class Address
+{
+private:
+    struct sockaddr_in _addr;
+    unsigned int _len;
+public:
+    Address();
+    Address(const Address &address);
+    Address(const unsigned short int family, const unsigned int addr, const unsigned short int port);
+    unsigned int& size();
+    struct sockaddr_in& operator*();
+};
+
+}
diff --git a/lesson_03/header/server.hpp b/lesson_03/header/server.hpp
new file mode 100644
index 0000000..5b1f24c
--- /dev/null
+++ b/lesson_03/header/server.hpp
@@ -0,0 +1,65 @@
+/*
+ * server.hpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+//#include <algorithm>
+
+#include <socket.hpp>
+#include <address.hpp>
+#include <memory>
+#include <vector>
+#include <string>
+
+namespace zh
+{
+
+class Server // @suppress("Class has a virtual method and non-virtual destructor")
+{
+protected:
+    std::unique_ptr<Socket> _socket;
+    std::unique_ptr<Address> _local, _client;
+    unsigned int _sizeClient;
+    const unsigned short int _port;
+    int _connfd;
+public:
+    Server(const unsigned short int port);
+    virtual void bind() = 0;
+    virtual void listen() = 0;
+};
+
+typedef void (*hook)(std::string buffer, Server &s);
+
+class ServerTCP: public Server // @suppress("Class has a virtual method and non-virtual destructor")
+{
+private:
+    bool _bind;
+    const unsigned short int _sizeBuffer;
+    std::unique_ptr<char[]> _buffer;
+
+    class Hook
+    {
+    private:
+        std::string _command;
+        hook _handler;
+    public:
+        Hook(std::string command, hook handler);
+        void execute(std::string buffer, Server &s);
+    };
+
+    std::vector<Hook> _hooks;
+
+    void chat();
+public:
+    ServerTCP(const unsigned short int port, const unsigned short int sizeBuffer = 1024);
+    void bind();
+    void listen();
+    void registerHook(std::string command, hook handler);
+};
+
+}
+
diff --git a/lesson_03/header/socket.hpp b/lesson_03/header/socket.hpp
new file mode 100644
index 0000000..4e29363
--- /dev/null
+++ b/lesson_03/header/socket.hpp
@@ -0,0 +1,26 @@
+/*
+ * socket.hpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+
+namespace zh {
+
+class Socket
+{
+private:
+    int _sockfd;
+public:
+    Socket(const int domain, const int type, const int protocol);
+    operator int() const;
+    ~Socket();
+};
+
+}
diff --git a/lesson_03/main.cpp b/lesson_03/main.cpp
new file mode 100644
index 0000000..cf64aad
--- /dev/null
+++ b/lesson_03/main.cpp
@@ -0,0 +1,32 @@
+/*
+ * main.cpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#include <ap.hpp>
+#include <iostream>
+
+#include <server.hpp>
+
+int main(int argc, char *argv[])
+{
+    ap::Hub hub({{ "port", 'p', ap::REQUIRED }});
+    hub.readArguments(argc, argv);
+
+    auto optionPort = hub.getOption('p');
+    if (!optionPort.isSet())
+    {
+        std::cerr << "Порт не был установлен!" << std::endl;
+        exit(EXIT_FAILURE);
+    }
+
+    int port = std::stoi(optionPort.getValues()[0]);
+
+    zh::ServerTCP tcpServer(port);
+    tcpServer.bind();
+    tcpServer.listen();
+
+    return 0;
+}
diff --git a/lesson_03/source/address.cpp b/lesson_03/source/address.cpp
new file mode 100644
index 0000000..132fa77
--- /dev/null
+++ b/lesson_03/source/address.cpp
@@ -0,0 +1,44 @@
+/*
+ * address.cpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#include <address.hpp>
+
+namespace zh {
+
+Address::Address()
+{
+    memset(&_addr, 0, sizeof(_addr));
+    _len = sizeof(_addr);
+}
+
+Address::Address(const Address &address)
+{
+    _addr = address._addr;
+    _len = address._len;
+}
+
+Address::Address(const unsigned short int family, const unsigned int addr, const unsigned short int port)
+{
+    memset(&_addr, 0, sizeof(_addr));
+    _len = sizeof(_addr);
+
+    _addr.sin_family = family;
+    _addr.sin_addr.s_addr = htonl(addr);
+    _addr.sin_port = htons(port);
+}
+
+unsigned int& Address::size()
+{
+    return _len;
+}
+
+struct sockaddr_in& Address::operator*()
+{
+    return _addr;
+}
+
+}
diff --git a/lesson_03/source/server.cpp b/lesson_03/source/server.cpp
new file mode 100644
index 0000000..9872b01
--- /dev/null
+++ b/lesson_03/source/server.cpp
@@ -0,0 +1,113 @@
+/*
+ * server.cpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#include <server.hpp>
+#include <iostream>
+#include <unistd.h>
+
+namespace zh
+{
+
+#define MAX 1024
+
+Server::Server(const unsigned short int port) : _port(port), _connfd(-1)
+{
+    _sizeClient = sizeof(*_client);
+}
+
+ServerTCP::Hook::Hook(std::string command, hook handler) : _command(command), _handler(handler)
+{
+}
+
+void ServerTCP::Hook::execute(std::string buffer, Server &s)
+{
+    if (_command == "")
+    {
+        _handler(buffer, s);
+    }
+    else
+    {
+        auto pos = buffer.find_first_of(_command);
+        if (pos != std::string::npos && pos == 0)
+        {
+            _handler(buffer, s);
+        }
+    }
+}
+
+void ServerTCP::registerHook(std::string command, hook handler)
+{
+    _hooks.push_back({ command, handler });
+}
+
+ServerTCP::ServerTCP(const unsigned short int port, const unsigned short int sizeBuffer) : Server(port), _bind(false), _sizeBuffer(sizeBuffer)
+{
+    _socket = std::make_unique<Socket>(AF_INET, SOCK_STREAM, IPPROTO_IP);
+    _local = std::make_unique<Address>(AF_INET, INADDR_ANY, port);
+    _buffer = std::make_unique<char[]>(sizeBuffer);
+}
+
+void ServerTCP::bind()
+{
+    if (_bind)
+    {
+        std::cerr << "Адрес уже связан с дескриптором слушающего сокета!" << std::endl;
+        return;
+    }
+
+    if (::bind((*_socket), reinterpret_cast<const sockaddr*>(&(*_local)), (*_local).size()) != 0)
+        std::cerr << "Не удаётся связать адрес с дескриптором слушающего сокета!" << std::endl;
+    else
+        _bind = true;
+}
+
+void ServerTCP::listen()
+{
+    if (::listen(*_socket, 0) != 0)
+    {
+        std::cerr << "Не удаётся создать очередь соединений для сокета!" << std::endl;
+        return;
+    }
+
+    while (_bind)
+    {
+        if ((_connfd = ::accept(*_socket, reinterpret_cast<sockaddr*>(&(*_client)), &_sizeClient)) < 0)
+        {
+            std::cerr << "Не удаётся верифицировать и принять пакеты от клиента!" << std::endl;
+            return;
+        }
+
+        // Обработка соединения с клиентом
+        chat();
+    }
+}
+
+void ServerTCP::chat()
+{
+//    char buff[MAX];
+//    int n;
+    while (true)
+    {
+//        bzero(buff, sizeof(buff));
+//        printf("Enter the string : ");
+//        n = 0;
+//        while ((buff[n++] = getchar()) != '\n')
+//            ;
+//        write(_connfd, buff, sizeof(buff));
+        bzero(_buffer.get(), _sizeBuffer);
+        read(_connfd, _buffer.get(), _sizeBuffer);
+        std::cout << _buffer.get() << std::endl;
+//        printf("From Server : %s", *_buffer);
+//        if ((strncmp((*_buffer), "exit", 4)) == 0)
+//        {
+//            printf("Client Exit...\n");
+//            break;
+//        }
+    }
+}
+
+}
diff --git a/lesson_03/source/socket.cpp b/lesson_03/source/socket.cpp
new file mode 100644
index 0000000..ccfe2a2
--- /dev/null
+++ b/lesson_03/source/socket.cpp
@@ -0,0 +1,32 @@
+/*
+ * socket.cpp
+ *
+ *  Created on: 5 сент. 2022 г.
+ *      Author: alexander
+ */
+
+#include <socket.hpp>
+#include <unistd.h>
+
+namespace zh {
+
+Socket::Socket(const int domain, const int type, const int protocol)
+{
+    if ((_sockfd = socket(domain, type, protocol)) < 0)
+    {
+        perror("socket creation failed");
+        exit(EXIT_FAILURE);
+    }
+}
+
+Socket::operator int() const
+{
+    return _sockfd;
+}
+
+Socket::~Socket()
+{
+    ::close(_sockfd);
+}
+
+}