Code C lập trình mạng bằng Socket UDP và TCP

TCP- GUI NHẬN BẰNG STRING

SERVER NHÉ CHÓ

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Net;

using System.Net.Sockets;

using System.IO;

namespace server

{

class Program

{

static bool kttang(int[] a, int n)

{

for (int i = 0; i < n-1; i++)

{

if (a[i] > a[i + 1])

return false;

}

return true;

}

static bool xuathien(int[] a, int n, int x) {

for (int i = 0; i < n; i++)

if (a[i] == x)

return true;

return false;

}

static bool songuyento(int[] a, int n) {

if (n <= 1)

return false;

for (int i = 2; i < n; i++)

if (n % i == 0)

return false;

return true;

}

static bool sochinhphuong(int a, int n) {

if (Math.Sqrt(a) * Math.Sqrt(a) == a) return true;

return false;

}

static int max(int[] a, int n)

{

int max = 0;

for (int i = 0; i < n; i++)

{

if (a[i] > max)

max = a[i];

}

return max;

}

static int min(int[] a, int n)

{

int min = a[0];

for (int i = 1; i < n; i++)

{

if (a[i] < min)

min = a[i];

}

return min;

}

static void Main(string[] args)

{

IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2018);

Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

server.Bind(ipe);

server.Listen(10);

Console.WriteLine("Waitting ");

Socket client = server.Accept();

Console.WriteLine("Chap nhan ket noi tu: " + client.RemoteEndPoint.ToString()); string s = "Server chao ban!";

NetworkStream ns = new NetworkStream(client);

StreamReader sr = new StreamReader(ns);

StreamWriter sw = new StreamWriter(ns);

// sw.WriteLine(s_gui);

sw.WriteLine(s);

sw.Flush();

while (true)

{

s= sr.ReadLine();

if (s == "exit") break;

Console.WriteLine("Client: " + s);

while (s.IndexOf(" ") != -1)

s = s.Replace(" ", " ");

s=s.Trim();

string[] str = s.Split(' ');

int n = str.Length;

int[] a = new int[100];

try

{

for (int i = 0; i < str.Length; i++)

{

a[i] = int.Parse(str[i]);

}

}

catch

{

sw.WriteLine("sai dinh dang");

sw.Flush();

}

string s5;

if (kttang(a, n))

s5="server: chuoi vua nhap tang dan";

else s5="server: chuoi vua nhap khong tang dan"; sw.WriteLine(s5);

sw.Flush();

int x = int.Parse(sr.ReadLine()); //string s2 = " "; string s4; if (xuathien(a, n, x)) {

s4 = "cac vi tri xuat hien cua " + x.ToString() + " la:";

for (int i = 0; i < n; i++) {

if (a[i] == x) {

s4 = s4 + (i + 1).ToString() + " "; }

}

}

else s4 = "khong xuat hien trong day."; sw.WriteLine(s4); sw.Flush(); //Console.ReadKey(); //string s3 = " "; s4 = "cac so chinh phuong trong mang la:"; for (int i = 0; i < n; i++) if (sochinhphuong(a[i], n)) {

s4 = s4 + a[i].ToString() + " "; }

sw.WriteLine(s4); sw.Flush(); //string s4 = " "; s4 = "so lon nhat trong day:" + max(a, n).ToString(); sw.WriteLine(s4); sw.Flush(); //string s4 = " "; s4 = "so nho nhat trong day:" + min(a, n).ToString(); sw.WriteLine(s4); sw.Flush(); for (int i = 0; i < n - 1; i++) {

if (a[i] % 2 != 0) {

for (int j = i + 1; j < n; j++) {

if (a[j] % 2 != 0) {

if (a[i] >= a[j]) {

int tg = a[i]; a[i] = a[j]; a[j] = tg; }

}

}

}

}

s4 = "chuoi sap xep le tang dan la: ";

for (int i = 0; i < n; i++)

{

s4 = s4 + a[i].ToString() + " ";

}

sw.WriteLine(s4);

sw.Flush();

}

ns.Close();

sw.Close();

sr.Close();

client.Close();

server.Close();

}

}

}

CLIENT NHÉ CHÓ

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Net;

using System.Net.Sockets;

using System.IO;

namespace client

{

class Program

{

static void Main(string[] args)

{

IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2018); Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

client.Connect(ipe);

NetworkStream ns = new NetworkStream(client);

StreamReader sr = new StreamReader(ns);

StreamWriter sw = new StreamWriter(ns);

while (true)

{

//Nhan mess tu server

//byte[] data_nhan = new byte[1024];

//int dembyte = client.Receive(data_nhan);

//String s = Encoding.ASCII.GetString(data_nhan, 0, dembyte);

String s = sr.ReadLine();

//String s = sr.ReadLine();

Console.WriteLine("Server: "+s);

//Gui mess sang Server

s = Console.ReadLine();

sw.WriteLine(s);

sw.Flush();

//byte[] data_gui = new byte[1024];

//data_gui = Encoding.ASCII.GetBytes(s);

//client.Send(data_gui, data_gui.Length, SocketFlags.None);

if (s == "exit") break;

string s5 = sr.ReadLine();

Console.WriteLine(" " + s5);

s = Console.ReadLine();

sw.WriteLine(s);

sw.Flush();

string s4 = sr.ReadLine();

Console.WriteLine(" " + s4);

s4 = sr.ReadLine();

Console.WriteLine(" " + s4);

s4 = sr.ReadLine();

Console.WriteLine(" " + s4);

s4 = sr.ReadLine();

Console.WriteLine(" " + s4);

s4 = sr.ReadLine();

Console.WriteLine(" " + s4);

}

client.Dispose();

//ns.Close();

//sw.Close();

//sr.Close();

client.Close();

}

}

}

UDP- GỦI NHẬN THÔNG QUA BYTE

SERVER NHÉ CHÓ

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Net;

using System.Net.Sockets;

using System.IO;

namespace server

{

class Program

{

static bool kttang(int []a,int n)

{

for(int i=0;i<n-1;i++)

{

if (a[i] > a[i + 1])

return false ;

}

return true;

}

static bool xuathien(int []a,int x,int n)

{

for (int i = 0; i < n; i++)

{

if (a[i] ==x)

return true;

}

return false;

}

static bool snt(int n)

{

for (int i = 2; i < n; i++)

{

if (n%i==0)

return false ;

}

return true;

}

static int max(int []a,int n)

{

int max=a[0];

for (int i = 0; i < n; i++)

{

if (a[i] >= max)

max = a[i];

}

return max;

}

static void Main(string[] args)

{

IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2019);

Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

server.Bind(ipe);

IPEndPoint ipenew = new IPEndPoint(IPAddress.Any, 0);

EndPoint ep = (EndPoint)ipenew;

//nhan

byte[] nhan = new byte[1024];

int demnhan = server.ReceiveFrom(nhan, ref ep);

string snhan = Encoding.ASCII.GetString(nhan, 0, demnhan);

Console.WriteLine("client :" + snhan);

//gui

byte[] gui = new byte[1024];

string sgui = "chao client, t la server";

gui = Encoding.ASCII.GetBytes(sgui);

server.SendTo(gui, ep);

while (true )

{

nhan = new byte[1024];

demnhan = server.ReceiveFrom(nhan, ref ep);

snhan = Encoding.ASCII.GetString(nhan, 0, demnhan);

while (snhan.IndexOf(" ") != -1)

snhan = snhan.Replace(" ", " ");

snhan.Trim();

string[] str = snhan.Split(' ');

int n = str.Length;

int[] a = new int[n];

for (int i = 0; i < str.Length; i++)

{

a[i] = int.Parse(str[i]);

}

string kq;

if(kttang (a,n))

kq="day duoc sap xep";

else kq="day chua duoc sap xep";

gui = new byte[1024];

gui = Encoding.ASCII.GetBytes(kq);

server.SendTo(gui, ep);

//gui x

nhan = new byte[1024];

demnhan = server.ReceiveFrom(nhan , ref ep);

snhan = Encoding.ASCII.GetString(nhan, 0, demnhan); int x = int.Parse(snhan);

if (xuathien(a, x, n))

{

kq = "co xuat hien " + x.ToString() + " o vi tri : "; for (int i = 0; i < n; i++)

{

if (a[i] == x)

{

kq = kq + (i + 1).ToString() + " ";

}

}

}

else

kq = "khong xuat hien";

gui = new byte[1024];

gui = Encoding.ASCII.GetBytes(kq);

server.SendTo(gui, ep);

kq = "so lon nhat: " + max(a, n).ToString();

gui = new byte[1024];

gui = Encoding.ASCII.GetBytes(kq);

server.SendTo(gui, ep);

kq = "cso nguyen to la : ";

for (int i = 0; i < n; i++)

{

if (snt (a[i]))

{

kq = kq + a[i].ToString () + " ";

}

}

kq = "mang sau sap xep la:";

for(int i=0;i<n-1;i++)

{

if(a[i]%2!=0)

for(int j=i+1;j<n;j++)

{

if (a[j] % 2 != 0)

{

if(a[i]>=a[j]) {

int tam = a[i]; a[i] = a[j]; a[j] = tam; }

}

}

}

for(int i=0;i<n;i++) {

kq = kq + a[i].ToString() + " "; }

gui = new byte[1024]; gui = Encoding.ASCII.GetBytes(kq); server.SendTo(gui, ep);

}

server.Close();

}

}

} CLIENT NHÉ CHÓ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Net; using System.Net.Sockets; using System.IO; namespace clinet { class Program {

static void Main(string[] args) {

IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 2019); Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); EndPoint ep = (EndPoint)ipe; byte [] gui = new byte[1024]; string sgui = "chao server, client day"; gui = Encoding.ASCII.GetBytes(sgui); client.SendTo(gui, ep); byte[] nhan = new byte[1024]; int demnhan = client.ReceiveFrom(nhan, ref ep); string snhan = Encoding.ASCII.GetString(nhan ,0 ,demnhan ); Console.WriteLine("server :" + snhan); while (true ) {

t: gui = new byte[1024];

sgui = Console.ReadLine();

while (sgui.IndexOf(" ") != -1)

sgui = sgui.Replace(" ", " ");

sgui.Trim();

string[] str = sgui.Split(' ');

int n = str.Length;

int[] a = new int[n];

try

{

for(int i=0;i<str.Length ;i++)

{

a[i] = int.Parse(str[i]);

}

}

catch

{

Console.WriteLine("sai dinh dang nhap lai:");

goto t;

}

gui = Encoding.ASCII.GetBytes(sgui);

client.SendTo(gui, ep);

nhan = new byte[1024];

demnhan = client.ReceiveFrom(nhan, ref ep);

string kq= Encoding.ASCII.GetString(nhan, 0, demnhan); Console.WriteLine("server :" + kq);

//gui x

gui = new byte[1024];

sgui = Console.ReadLine();

gui = Encoding.ASCII.GetBytes(sgui);

client.SendTo(gui, ep);

nhan = new byte[1024];

demnhan = client.ReceiveFrom(nhan, ref ep);

kq = Encoding.ASCII.GetString(nhan, 0, demnhan);

Console.WriteLine("server :" + kq);

nhan = new byte[1024];

demnhan = client.ReceiveFrom(nhan, ref ep);

kq = Encoding.ASCII.GetString(nhan, 0, demnhan); Console.WriteLine("server :" + kq);

nhan = new byte[1024];

demnhan = client.ReceiveFrom(nhan, ref ep);

kq = Encoding.ASCII.GetString(nhan, 0, demnhan); Console.WriteLine("server :" + kq);

nhan = new byte[1024];

demnhan = client.ReceiveFrom(nhan, ref ep);

kq = Encoding.ASCII.GetString(nhan, 0, demnhan); Console.WriteLine("server :" + kq);

}

client.Close();

}

}

}