EHONWA

#!/bin/bash

# Function to display the introduction message.
function display_intro() {
    echo -e "\e[1;92m-----------------------------------------------------------"
    echo -e "| \e[1;92mEHONWA - TCP and UDP Educational Resource Tool \e[1;92m|"
    echo -e "-----------------------------------------------------------\e[0m"
    echo "Welcome to EHONWA, your comprehensive guide to TCP and UDP protocols!"
    echo "Explore the world of networking, deepen your understanding, and enhance your skills."
}

# Function to display the main menu options.
function display_menu() {
    echo -e "\e[1;96mChoose an option:"
    echo "1. \e[1;92mLearn TCP Basics"
    echo "2. \e[1;92mLearn UDP Basics"
    echo "3. \e[1;92mAdvanced Concepts"
    echo "4. \e[1;92mReal-world Examples"
    echo "5. \e[1;92mExplore Protocols"
    echo "6. \e[1;92mUpdate EHONWA"
    echo "7. \e[1;92mAdditional Learning Resources"
    echo "8. \e[1;92mGenerate Network Traffic (Simulation)"
    echo "9. \e[1;92mSimulate Network Issues (Testing)"
    echo "10. \e[1;91mExit\e[0m"
}

# Function to learn TCP basics.
function learn_tcp_basics() {
    echo -e "\e[1;92mTCP (Transmission Control Protocol):"
    echo "TCP is a connection-oriented, reliable protocol with key features:"
    echo "1. \e[1;92mReliability:\e[0m Ensures data delivery through acknowledgments and retransmission."
    echo "2. \e[1;92mSequencing:\e[0m Orders data packets for accurate reconstruction at the receiver."
    echo "3. \e[1;92mConnection Establishment:\e[0m Uses a three-way handshake for reliability."
    echo "4. \e[1;92mFlow Control:\e[0m Manages transfer rates to prevent congestion."
    echo "5. \e[1;92mError Checking:\e[0m Utilizes checksums for data integrity."

    echo -e "Example using curl for TCP:"
    echo -e "\e[1;96m\`\`\`bash"
    echo "curl -X GET tcp://example.com/data"
    echo "\`\`\`"
    echo "This simulates a TCP request to fetch data from a server.\e[0m"
}

# Function to learn UDP basics.
function learn_udp_basics() {
    echo -e "\e[1;92mUDP (User Datagram Protocol):"
    echo "UDP is a connectionless, lightweight protocol with characteristics:"
    echo "1. \e[1;92mLow Latency:\e[0m Prioritizes speed over reliability for real-time applications."
    echo "2. \e[1;92mBroadcast and Multicast:\e[0m Supports one-to-many or many-to-many data distribution."
    echo "3. \e[1;92mStreaming Media:\e[0m Ideal for real-time streaming with acceptable data loss."
    echo "4. \e[1;92mGaming:\e[0m Commonly used for online gaming due to low latency."
    echo "5. \e[1;92mSimple Request-Response:\e[0m Suitable for scenarios with a simple request-response model."

    echo -e "Example using curl for UDP:"
    echo -e "\e[1;96m\`\`\`bash"
    echo "curl -X GET udp://example.com/data"
    echo "\`\`\`"
    echo "This initiates a UDP request to obtain data from a server.\e[0m"
}

# Function to explore advanced concepts in TCP and UDP.
function advanced_concepts() {
    echo -e "\e[1;92mAdvanced Concepts:"
    echo "1. \e[1;92mWindow Scaling:\e[0m TCP optimizes data transfer over high-latency connections."
    echo "2. \e[1;92mSelective Acknowledgments (SACK):\e[0m Enhances TCP's reliability by acknowledging specific data segments."
    echo "3. \e[1;92mQuality of Service (QoS):\e[0m UDP can be used with QoS settings to prioritize traffic."
    echo "4. \e[1;92mSecurity Measures:\e[0m Explore encryption and authentication in TCP/UDP for enhanced security."

    read -p "\e[1;96mEnter the number of the topic you want to explore (1-4): " choice

    case $choice in
        1)
            echo -e "\e[1;92mWindow Scaling:\e[0m TCP adapts to different network conditions, improving performance by adjusting the size of the data window."
            ;;
        2)
            echo -e "\e[1;92mSelective Acknowledgments (SACK):\e[0m TCP acknowledges specific data segments, reducing retransmissions and optimizing data transfer."
            ;;
        3)
            echo -e "\e[1;92mQuality of Service (QoS):\e[0m UDP can prioritize real-time applications over other traffic, ensuring a smoother user experience."
            ;;
        4)
            echo -e "\e[1;92mSecurity Measures:\e[0m Implement encryption and authentication for enhanced security in both TCP and UDP communications. This ensures data confidentiality and integrity, crucial in secure communication."
            ;;
        *)
            echo "Invalid choice. Returning to the main menu."
            ;;
    esac
}

# Function to provide real-world examples of TCP and UDP usage.
function real_world_examples() {
    echo -e "\e[1;92mReal-world Examples:"
    echo "1. \e[1;92mHTTP - TCP:\e[0m Web browsing uses TCP for reliable data transfer."
    echo "2. \e[1;92mDNS - UDP:\e[0m DNS queries use UDP for faster response times."
    echo "3. \e[1;92mVideo Streaming - UDP:\e[0m Services like YouTube use UDP for low-latency streaming."
    echo "4. \e[1;92mVoIP - UDP:\e[0m Voice over IP relies on UDP for real-time audio communication."
    echo "5. \e[1;92mOnline Gaming - UDP:\e[0m Games like Fortnite use UDP for low-latency interactions."

    read -p "\e[1;96mEnter the number of the example you want to explore (1-5): " choice

    case $choice in
        1)
            echo -e "\e[1;92mHTTP - TCP:\e[0m Web browsers use TCP to ensure reliable delivery of web pages and resources, making it essential for a seamless browsing experience."
            ;;
        2)
            echo -e "\e[1;92mDNS - UDP:\e[0m DNS queries use\e[1;92mUDP for quick response times in resolving domain names, facilitating faster internet navigation."
            ;;
        3)
            echo -e "\e[1;92mVideo Streaming - UDP:\e[0m Services like YouTube use UDP for low-latency video streaming, prioritizing real-time playback and providing a smooth viewing experience."
            ;;
        4)
            echo -e "\e[1;92mVoIP - UDP:\e[0m Voice over IP relies on UDP for real-time audio communication, emphasizing immediacy over perfect quality, ensuring clear and uninterrupted voice communication in applications like Skype or Zoom."
            ;;
        5)
            echo -e "\e[1;92mOnline Gaming - UDP:\e[0m Games like Fortnite use UDP for low-latency multiplayer interactions, ensuring responsive gameplay and a more enjoyable gaming experience."
            ;;
        *)
            echo "Invalid choice. Returning to the main menu."
            ;;
    esac
}

# Function to explore various network protocols.
function explore_protocols() {
    echo -e "\e[1;92mExplore Protocols:"
    echo "1. \e[1;92mHTTP - Hypertext Transfer Protocol"
    echo "2. \e[1;92mFTP - File Transfer Protocol"
    echo "3. \e[1;92mSMTP - Simple Mail Transfer Protocol"
    echo "4. \e[1;92mSSH - Secure Shell Protocol"
    echo "5. \e[1;92mSNMP - Simple Network Management Protocol"
    echo "6. \e[1;92mCustom Protocol - Simulate a custom network protocol for educational purposes."

    read -p "\e[1;96mEnter the number of the protocol you want to explore (1-6): " choice

    case $choice in
        1)
            echo -e "\e[1;92mHTTP - Hypertext Transfer Protocol:\e[0m The foundation of data communication on the web. It facilitates the transfer of text, images, and multimedia. Used for web browsing and accessing web-based applications."
            ;;
        2)
            echo -e "\e[1;92mFTP - File Transfer Protocol:\e[0m Used for transferring files between a server and a client on a network. Commonly employed for website maintenance, file sharing, and software distribution."
            ;;
        3)
            echo -e "\e[1;92mSMTP - Simple Mail Transfer Protocol:\e[0m Handles the sending of emails between servers. Essential for electronic communication and email delivery, ensuring reliable email communication."
            ;;
        4)
            echo -e "\e[1;92mSSH - Secure Shell Protocol:\e[0m Provides secure access to a remote computer over a network. Widely used for secure command-line access, file transfers, and remote management of systems."
            ;;
        5)
            echo -e "\e[1;92mSNMP - Simple Network Management Protocol:\e[0m Used for managing and monitoring network devices. Enables administrators to monitor and control network resources, ensuring optimal network performance."
            ;;
        6)
            echo -e "\e[1;92mCustom Protocol - Simulate a Custom Network Protocol:\e[0m Simulate the creation and behavior of a custom network protocol for educational purposes. Understand the process of designing and implementing a protocol."
            ;;
        *)
            echo "Invalid choice. Returning to the main menu."
            ;;
    esac
}

# Function to update the educational tool.
function update_tool() {
    echo -e "\e[1;92mUpdating EHONWA - TCP and UDP Educational Tool...\e[0m"
    # Add update logic here
    echo -e "\e[1;92mEHONWA updated successfully!\e[0m"
}

# Function to provide additional learning resources.
function additional_resources() {
    echo -e "\e[1;92mAdditional Learning Resources:"
    echo "1. \e[1;96mTCP/IP Illustrated, Volume 1: The Protocols by W. Richard Stevens"
    echo "2. \e[1;96mComputer Networking: Principles, Protocols and Practice by Olivier Bonaventure"
    echo "3. \e[1;96mNetwork Warrior: Everything You Need to Know That Wasn't on the CCNA Exam by Gary A. Donahue"
    echo "4. \e[1;96mWireshark Network Analysis by Laura Chappell"
    echo "5. \e[1;96mRFC (Request for Comments) documents for in-depth protocol specifications."

    read -p "\e[1;96mEnter the number of the resource you want to explore or 'back' to return to the main menu: " choice

    case $choice in
        1)
            echo -e "\e[1;92mTCP/IP Illustrated, Volume 1: The Protocols by W. Richard Stevens:\e[0m A comprehensive guide providing a detailed understanding of TCP/IP protocols with clear illustrations and examples."
            ;;
        2)
            echo -e "\e[1;92mComputer Networking: Principles, Protocols and Practice by Olivier Bonaventure:\e[0m A textbook covering the principles of computer networking, including protocols like TCP and UDP."
            ;;
        3)
            echo -e "\e[1;92mNetwork Warrior: Everything You Need to Know That Wasn't on the CCNA Exam by Gary A. Donahue:\e[0m Practical insights into network administration, with real-world scenarios and tips for managing networks effectively."
            ;;
        4)
            echo -e "\e[1;92mWireshark Network Analysis by Laura Chappell:\e[0m A guide to using Wireshark for network analysis, helping you understand and troubleshoot network protocols."
            ;;
        5)
            echo -e "\e[1;92mRFC (Request for Comments) documents:\e[0m Explore the official specifications for TCP, UDP, and other network protocols. These documents provide in-depth details about protocol standards and implementations."
            ;;
        "back")
            echo "Returning to the main menu."
            ;;
        *)
            echo "Invalid choice. Returning to the main menu."
            ;;
    esac
}

# Function to generate network traffic for simulation purposes.
function generate_network_traffic() {
    echo -e "\e[1;92mGenerating Network Traffic...\e[0m"
    # Add logic to generate network traffic (e.g., using tools like iperf)
    echo -e "\e[1;92mNetwork traffic generated successfully!\e[0m"
}

# Function to simulate network issues for testing.
function simulate_network_issues() {
    echo -e "\e[1;92mSimulating Network Issues...\e[0m"
    # Add logic to simulate network issues (e.g., using tools like tc)
    echo -e "\e[1;92mNetwork issues simulated successfully!\e[0m"
}

# Function to exit the educational tool.
function exit_tool() {
    echo -e "\e[1;91mExiting EHONWA - TCP and UDP Educational Tool. Goodbye!\e[0m"
    exit 0
}

# Function to handle invalid choices.
function handle_invalid
# Function to handle invalid choices.
function handle_invalid_choice() {
    echo -e "\e[1;91mInvalid choice. Please enter a valid option.\e[0m"
}

# Function to handle errors with a provided error message.
function handle_error() {
    local error_message="$1"
    echo -e "\e[1;91mError: $error_message\e[0m"
    echo -e "\e[1;91mPlease review the information provided and try again.\e[0m"
}

# Function to display the graphical user interface.
function display_gui() {
    clear
    echo -e "\e[1;92m-----------------------------------------------------------"
    echo -e "| \e[1;92mEHONWA - TCP and UDP Educational Resource Tool \e[1;92m|"
    echo -e "-----------------------------------------------------------\e[0m"
    display_menu
}

# Main loop to interact with the user.
while true; do
    display_gui

    read -p "\e[1;96mEnter your choice: " choice

    case $choice in
        1) learn_tcp_basics ;;
        2) learn_udp_basics ;;
        3) advanced_concepts ;;
        4) real_world_examples ;;
        5) explore_protocols ;;
        6) update_tool ;;
        7) additional_resources ;;
        8) generate_network_traffic ;;
        9) simulate_network_issues ;;
        10 | "exit") exit_tool ;;
        *) handle_invalid_choice ;;
    esac
done