7-amaliy ish. Soketlar asosida amaliy pog’ona ilovalarini loyixalash Ishdan maqsad

7-amaliy ish.
Soketlar asosida amaliy pog’ona ilovalarini loyixalash
Ishdan maqsad: Telekommunikatsiyalarda kommutatsiya va marshrutizatsiyalash turlari, sokketlar va sokketlar asosida tarmoq qurilish prinsiplarini o‘rganish.
Nazariy ma’lumotlar.
TCP soketlar ulanishga yo‘naltirilgan mijoz server aloqa dasturlarini ishlab chiqish uchun ishlatiladi. Agar server bir mijoz ulanishi bilan ma'lumotlarni uzatishdan oldin to'rtta vazifalarni bajaradi:
- Socketni yaratish;
- Mahalliy IPEndPoint;
- Ish joyi socket rejimini tinglash;
- Socket kiruvchi aloqani qabul qiling.
Bu dars bu protseduralar oddiy TCP server yaratish uchun qanday amalga oshirilishini ko'rsatadi.
Server yaratish
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);
Socket newsock = Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
newsock.Bind(ipep);
newsock.Listen(10);
Socket client = newsock.Accept();
Qabul () usuli bilan yaratilgan Socket ob'ekt endi server va mijoz o'rtasidagi masofadan ikki tomonga ham ma'lumotlarni uzatish uchun foydalanish mumkin.
Bu barcha asosiy bosqichlar SimpleTcpSrvr.cs dasturida namoyish etiladi.
SimpleTcpSrvr.cs dasturi.

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace ConsoleApplication5
{
class Program
{
static void Main(string[] args)
{
int recv;
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any,
9050);
Socket newsock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
newsock.Bind(ipep);
newsock.Listen(10);
Console.WriteLine("Waiting for a client...");
Socket client = newsock.Accept();
IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint;
Console.WriteLine("Connected with {0} at port {1}", clientep.Address, clientep.Port);
string welcome = "Welcome to my test server";
data = Encoding.ASCII.GetBytes(welcome);
client.Send(data, data.Length,SocketFlags.None);
while(true)
{
data = new byte[1024];
recv = client.Receive(data);
if (recv == 0)
break;
Console.WriteLine( Encoding.ASCII.GetString(data, 0, recv));
client.Send(data, recv, SocketFlags.None);
}
Console.WriteLine("Disconnected from {0}",clientep.Address);
client.Close();
newsock.Close();
}
}
}
Birinchidan, bo'sh baytda kiruvchi va chiquvchi xabarlar uchun bir adres bufer sifatida belgilangan. Socket orqali uzatiladigan barcha ma'lumotlar qandaydir bir baytlar qatori bo‘lishi kerak.
Next, an IPEndPoint object is defined for the local server machine:
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);
IP Address.Any maydonidan foydalanib, server tizimiga uzatilishi mumkin bo'lgan har qanday tarmoq interfeysi kelgan ulanish so'rovlarini qabul qiladi. Agar faqat bitta interfeysidan paketlarini qabul qilishdan manfaatdor bo'lsangiz, alohida-alohida quyidagi ibora bilan uning IP manzilini ko'rsatish mumkin:
IPEndPoint ipep = new
IPEndPoint(IPAddress.Parse("192.168.1.6"), 9050);
Bu misolda, server, darhol mijozga xabar yuboradi va keyin mijoz kelgan xabarlarni kutadi:
string welcome = "Welcome to my test server";
data = Encoding.ASCII.GetBytes(welcome);
client.Send(data, data.Length,
SocketFlags.None);
while(true)
{
data = new byte[1024];
recv = client.Receive(data);
if (recv == 0)
break;
Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));
client.Send(data, recv, SocketFlags.None);
}
Ishni bajarish tartibi

Yangi loyiha yaratish:

Loyiha nomi, masalan “Helper_TCPClient” ,“OK” bosiladi.

"System.Net" va "System.Net.Sockets" qo'shish .NET Framework Class Nomlar fazosi tizimi tarmoq vazifalarini foydalanish uchun.



Masala.
Bu ishda siz:
- Variantingiz bo‘yicha dastur yozish;
- Sizning dasturingizda ishlatiladigan maxsus sinf va usuli haqida qisqacha ma'lumot berish.
- Bu ish bo‘yicha hisobot yozishingiz kerak.
Nazorat savollari
Telekommunikatsiyada kommutatsiya tushunchasi?
Telekommunikatsiyada marshrutizatsiya tushunchasi.
Marshrutizatsiyalash usullari va ularning farqlari nimada?