Sync and async server

.vscode/settings.json

@@ -44,6 +44,7 @@
         "stdexcept": "cpp",
         "streambuf": "cpp",
         "cinttypes": "cpp",
-        "typeinfo": "cpp"
+        "typeinfo": "cpp",
+        "thread": "cpp"
     }
 }

lib/tcp_socket.hpp

@@ -3,6 +3,9 @@
 
 #include <iostream>
 #include <string>
+#include <vector>
+#include <thread>
+#include <mutex>
 #include <string.h>
 #include <arpa/inet.h>
 #include <netdb.h>
@@ -14,6 +17,11 @@
 
 using namespace std;
 
+class client;
+// class secure;
+// class server;
+
+
 /**
  * Server klasa za TCP/IP soket
  * Instanca se incijalizira kada pokrećemo server
@@ -23,10 +31,15 @@ class server {
     public:
     int sock;
     struct sockaddr_in addr;
+    SSL_CTX* securefds = NULL;
+    vector<thread> thr;
 
-    server (const ushort port, const uint limit = 1000);
+    server (const ushort port, const uint queue = 1000, SSL_CTX* _securefds = NULL);
     ~server ();
 
+    void sync(void (*handlecli)(client&), const uint timeout = 100);
+    void async(const uint limit, void (*handlecli)(client&, mutex&), const uint timeout = 100);
+
 };
 
 /**
@@ -51,40 +64,23 @@ class secure {
 
 class client {
     public:
-    int sock;
+    // zajedničke
+    int conn; // mijenja sock
     struct sockaddr_in addr;
     SSL* ssl = NULL;
-
-    client (const string address, const ushort port, const uint timeout = 100, SSL_CTX* securefds = NULL);
-    ~client ();
-    bool tell (const string msg);
-    string obey (size_t byte_limit = 1024);
-};
-
-
-/**
- * Klasa za inicijalizaciju dolaznih veza
- * Definira se na serverskom tipu aplikacija i predstavlja identifikator klijenta
-*/
-
-class comming {
-    public:
+    // server s klijentima
     const server* srv;
-    struct sockaddr_in addr;
-    int conn;
+    // klijent sa serverom
     string ipv4;
     string ipv6;
-    SSL* ssl = NULL;
-
-    comming(const server *_srv, const uint timeout = 100, SSL_CTX* securefds = NULL);
-    ~comming();
-    bool tell (const string msg);
-    string obey (size_t byte_limit = 1024);
-
     
+    // konstruktor za klijente bez servera
+    client (const string address, const ushort port, const uint timeout = 100, SSL_CTX* securefds = NULL);
+    // konstruktor za klijente sa serverom
+    client (const server *_srv, const uint timeout = 100, SSL_CTX* securefds = NULL);
+    ~client ();
+    bool push (const string msg);
+    string pull (size_t byte_limit = 1024);
 };
 
-
-
-
 #endif

src/tcp_socket.cpp

@@ -4,7 +4,8 @@
  * Kontrustruktor varijable tipa server, prima port i limit za ograničenje liste klijenata na čekanju
 */
 
-server::server (const ushort port, const uint limit) {
+server::server (const ushort port, const uint queue, SSL_CTX* _securefds) {
+    securefds = _securefds;         
 
     addr.sin_family = AF_INET;
     addr.sin_addr.s_addr = INADDR_ANY;
@@ -25,12 +26,50 @@ server::server (const ushort port, const uint limit) {
         throw string("[ERROR] Unable to bind socket ");
     }
 
-    if (listen(sock, limit) < 0) {
+    if (listen(sock, queue) < 0) {
         throw string("[ERROR] It is not possible to set the allowed number of waiting clients ");
     }
 
 }
 
+/**
+ * Metoda za sinkroni rad s klijentima, prima pokazivač na funkciju i timeout;
+ * Funkcija handlecli prima referencu tipa client - važno za definiranje funkcija koje se šalju;
+ * Nije moguće proslijediti druge parametre;
+*/
+
+void server::sync(void (*handlecli)(client&), const uint timeout) {
+    do {
+        client cli(this, timeout, securefds);
+        handlecli(cli);
+    } while (true);
+}
+
+/**
+ * Metoda za asinkdorni rad s klijentima, prima limit, pokazivač na funkciju i timeout;
+ * Funkcija handlecli prima referencu tipa client - važno za definiranje funkcija koje se šalju;
+ * Nije moguće proslijediti druge parametre;
+*/
+
+void server::async(const uint limit, void (*handlecli)(client&, mutex&), const uint timeout) {
+    mutex io;
+    do {
+        for (uint i=0; i<limit; i++) {
+            thr.push_back(thread([&](){
+                client cli(this, timeout, securefds);
+                handlecli(cli, io);
+            }));
+        }
+
+        for (uint i=0; i<limit; i++) {
+            thr[i].join();
+        }
+        thr.clear();
+
+    } while (true);
+}
+
+
 /**
  * Destruktor varijable tipa server
 */
@@ -110,8 +149,8 @@ secure::~secure () {
 
 client::client(const string address, const ushort port, const uint timeout, SSL_CTX* securefds) {
 
-    sock = socket(AF_INET, SOCK_STREAM, 0);
-	if (sock < 0) {
+    conn = socket(AF_INET, SOCK_STREAM, 0);
+	if (conn < 0) {
         throw string("[ERROR] Unable to open TCP socket ");
 	}
 
@@ -121,7 +160,7 @@ client::client(const string address, const ushort port, const uint timeout, SSL_
 	addr.sin_addr.s_addr = inet_addr(_address.c_str());
 	addr.sin_port = htons(port);
 
-    if (connect(sock, (struct sockaddr*)&addr, sizeof(struct sockaddr_in)) != 0) {
+    if (connect(conn, (struct sockaddr*)&addr, sizeof(struct sockaddr_in)) != 0) {
         throw string("Unable to connect to server ");
     }
 
@@ -129,7 +168,7 @@ client::client(const string address, const ushort port, const uint timeout, SSL_
     tv.tv_sec = timeout/1000;
     tv.tv_usec = (timeout%1000)*1000;
 
-    if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
+    if (setsockopt(conn, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
         throw string("[ERROR] Unable to set timeout ");
     }
 
@@ -138,7 +177,7 @@ client::client(const string address, const ushort port, const uint timeout, SSL_
         if (!ssl) {
             throw string("[ERROR] Creating SSL object ");
         }
-        SSL_set_fd(ssl, sock);
+        SSL_set_fd(ssl, conn);
 
         // Perform the SSL handshake
         if (SSL_connect(ssl) <= 0) {
@@ -150,65 +189,6 @@ client::client(const string address, const ushort port, const uint timeout, SSL_
 
 }
 
-
-/**
- * Destruktor varijable tipa client
-*/
-
-client::~client () {
-
-    if (ssl) {
-        SSL_shutdown(ssl);
-        SSL_free(ssl);
-    }
-
-    if (sock <= 0) {
-        throw string("[ERROR] The socket is already closed "); 
-    }
-
-    else if (close(sock) != 0) {
-        throw string("[ERROR] Unable to close socket ");
-    }
-
-}
-
-/**
- * Metoda klase client za slanje podataka preko soketa
- * Prima string koji će biti poslan
- * Vraća logički statu poređenja psolanih karaktera i karaktera u stringu
-*/
-
-
-bool client::tell (const string msg) {
-    size_t sended = 0;
-    if (ssl) {
-       sended = SSL_write(ssl, msg.c_str(), msg.length());
-    }
-    else {
-        sended = write(sock, msg.c_str(), msg.length());
-    }
-    return sended == msg.length();
-}
-
-/**
- * Metoda klase client za primanje poruke preko soketa
- * Prima dozvoljeni broj karaktera koji će primiti
- * Vraća string primljene poruke
-*/
-
-string client::obey (size_t byte_limit) {
-   char res[byte_limit] = {0};
-
-    if (ssl) {
-        SSL_read(ssl, res, byte_limit);
-    }
-    else {
-        read(sock , res, byte_limit);
-    }
-
-    return string(res);
-}
-
 /**
  * Konstruktor varijable tipa commint
  * Prima pokazivač na inicijaliziranu varijablu tipa, port, 
@@ -217,7 +197,7 @@ string client::obey (size_t byte_limit) {
 */
 
 
-comming::comming(const server *_srv, const uint timeout, SSL_CTX* securefds) {
+client::client(const server *_srv, const uint timeout, SSL_CTX* securefds) {
     srv = _srv;
     socklen_t len = sizeof(struct sockaddr_in);
 
@@ -259,11 +239,12 @@ comming::comming(const server *_srv, const uint timeout, SSL_CTX* securefds) {
 
 }
 
+
 /**
- * Destruktor varijable tipa comming
+ * Destruktor varijable tipa client
 */
 
-comming::~comming() {
+client::~client () {
 
     if (ssl) {
         SSL_shutdown(ssl);
@@ -277,16 +258,18 @@ comming::~comming() {
     else if (close(conn) != 0) {
         throw string("[ERROR] Unable to close socket ");
     }
+
 }
 
 /**
- * Metoda klase comming za slanje podataka preko soketa
+ * Metoda klase client za slanje podataka preko soketa
  * Prima string koji će biti poslan
  * Vraća logički statu poređenja psolanih karaktera i karaktera u stringu
 */
 
-bool comming::tell (const string msg) {
-    ssize_t sended = 0;
+
+bool client::push (const string msg) {
+    size_t sended = 0;
     if (ssl) {
        sended = SSL_write(ssl, msg.c_str(), msg.length());
     }
@@ -296,14 +279,13 @@ bool comming::tell (const string msg) {
     return sended == msg.length();
 }
 
-
 /**
- * Metoda klase comming za primanje poruke preko soketa
+ * Metoda klase client za primanje poruke preko soketa
  * Prima dozvoljeni broj karaktera koji će primiti
  * Vraća string primljene poruke
 */
 
-string comming::obey (size_t byte_limit) {
+string client::pull (size_t byte_limit) {
    char res[byte_limit] = {0};
 
     if (ssl) {
@@ -315,3 +297,6 @@ string comming::obey (size_t byte_limit) {
 
     return string(res);
 }
+
+
+

test/client.cpp

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <string>
 
 #include "../lib/tcp_socket.hpp"
 
@@ -8,19 +9,35 @@ int main() {
 
     try {
 
-        secure crypto;
-        cout << "init cert " << endl;
+        uint n = 10000;
 
-        client myserver("127.0.0.1", 5000, 5000, crypto.fds);
+        vector<thread> thr;
+        for (uint i=0; i<n; i++) {
+            thr.push_back(thread([](uint a){
+                client myserver("127.0.0.1", 5000, 500);
+                string sends = "Hello world " + to_string(a);
+                myserver.push(sends);
+                cout << myserver.pull() << endl;                
+            }, i));
+        }
+
+        for (uint i=0; i<n; i++) {
+            thr[i].join();
+        } 
+
+        // secure crypto;
+        // cout << "init cert " << endl;
+
+        // client myserver("127.0.0.1", 5000, 5000, crypto.fds);
         // client myserver("localhost", 5000);
-        cout << "init client " << endl;
+        // cout << "init client " << endl;
 
 
-        string sends = "Hello world!";
-        cout << myserver.tell(sends) << " " << sends.length() << endl;
-        cout << "wait client " << endl;
+        // string sends = "Hello world!";
+        // cout << myserver.push(sends) << " " << sends.length() << endl;
+        // cout << "wait client " << endl;
 
-        cout << myserver.obey();
+        // cout << myserver.pull();
 
     }
     catch (const string err) {

test/server.cpp

@@ -6,21 +6,26 @@ using namespace std;
 
 int main() {
     try{
-        cout << "init server " << endl;
-        server myserver(5000);
-        cout << "init cert " << endl;
-        secure crypto ("../example/cert.pem", "../example/privkey.pem");
-        cout << "init client " << endl;
-
-        comming myclient(&myserver, 100, crypto.fds);
-        // comming myclient(&myserver, 100);
-        cout << "wait client " << myclient.ipv4 << endl;
-
-        string fromclient =  myclient.obey();
-        cout << "tell client " << fromclient << endl;
-        // usleep(600*1000);
-        sleep(5);
-        myclient.tell(fromclient);
+        // cout << "init cert " << endl;
+        // secure crypto ("../example/cert.pem", "../example/privkey.pem");
+        // cout << "init server " << endl;
+        // server myserver(5000, 100, crypto.fds);
+        
+        // cout << "init client " << endl;
+
+        // // client myclient(&myserver, 100, crypto.fds);
+        // // comming myclient(&myserver, 100);
+        // myserver.accept();
+        // // cout << "wait client " << myclient.ipv4 << endl;
+        // cout << "wait client " << myserver.cli->ipv4 << endl;
+
+        // string fromclient =  myserver.cli->pull();
+        // // string fromclient =  myclient.pull();
+        // cout << "tell client " << fromclient << endl;
+        // // usleep(600*1000);
+        // sleep(5);
+        // myserver.cli->push(fromclient);
+        // myclient.push(fromclient);
         // myclient.~comming();
 
         // while (true) {
@@ -33,6 +38,31 @@ int main() {
         // }
 
         // sleep(80);
+
+
+        server myserver(5000, 100);
+        myserver.async(8, [](client &cli, mutex &io) {
+            cout << "Klijent " << cli.ipv4 << endl;
+            string fromclient = cli.pull();
+            io.lock();
+            cout << "S klijenta " << fromclient << endl;
+            io.unlock();
+            // fromclient += teststr;
+            cli.push(fromclient);
+        }, 200);
+
+        // string teststr = " Idemooo";
+
+        // myserver.sync([](client &cli, mutex &io) {
+        //     cout << "Klijent " << cli.ipv4 << endl;
+        //     string fromclient = cli.pull();
+        //     io.lock();
+        //     cout << "S klijenta " << fromclient << endl;
+        //     io.unlock();
+        //     // fromclient += teststr;
+        //     cli.push(fromclient);
+        // });
+
     }
     catch(const string err) {
         cout << err << endl;