Sync and async server

.vscode/settings.json

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

.vscode/tasks.json

@@ -0,0 +1,31 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++ build active file",
+            "command": "/usr/bin/g++",
+            "args": [
+                "-g",
+                "${fileDirname}/client.cpp",
+                "${fileDirname}/../src/*.cpp",
+                // "${fileDirname}../include/*/src/*.cpp",
+                "-o",
+                "${fileDirname}/client.o",
+                "-lssl",
+                "-lcrypto"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

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 = 500, 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:
-    const server *srv;
-    struct sockaddr_in addr;
-    int conn;
+    // server s klijentima
+    const server* srv;
+    // 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;
@@ -12,25 +13,63 @@ server::server (const ushort port, const uint limit) {
 
     sock = socket(AF_INET, SOCK_STREAM, 0); 
     if (sock <= 0) {  
-        throw "[ERROR] Unable to open TCP socket ";
+        throw string("[ERROR] Unable to open TCP socket ");
 
     }
 
     int opt=1;
     if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
-        throw "[ERROR] Unable to set REUSEADDR or REUSEPORT on socket ";
+        throw string("[ERROR] Unable to set REUSEADDR or REUSEPORT on socket ");
     }
 
     if (bind(sock, (struct sockaddr *)&addr, sizeof(struct sockaddr_in)) < 0) {
-        throw "[ERROR] Unable to bind socket ";
+        throw string("[ERROR] Unable to bind socket ");
     }
 
-    if (listen(sock, limit) < 0) {
-        throw "[ERROR] It is not possible to set the allowed number of waiting clients ";
+    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
 */
@@ -39,11 +78,11 @@ server::server (const ushort port, const uint limit) {
 server::~server () {
 
     if (sock<=0) {
-        throw "[ERROR] The socket is already closed "; 
+        throw string("[ERROR] The socket is already closed "); 
     }
 
     else if (close(sock) != 0) {
-        throw "[ERROR] Unable to close socket ";
+        throw string("[ERROR] Unable to close socket ");
     }
 
 }
@@ -53,9 +92,14 @@ server::~server () {
 */
 
 secure::secure() {
+
+    SSL_library_init();
+    SSL_load_error_strings();
+    OpenSSL_add_all_algorithms();
+
     fds = SSL_CTX_new(SSLv23_client_method());
     if (!fds) {
-        throw "[ERROR] Creating SSL context ";
+        throw string("[ERROR] Creating SSL context ");
 
     }
 }
@@ -71,19 +115,19 @@ secure::secure(const string cert, const string priv) {
     SSL_load_error_strings();
     OpenSSL_add_all_algorithms();
 
-        // Create an SSL context
+    // Create an SSL context
     fds = SSL_CTX_new(SSLv23_server_method());
     if (!fds) {
-        throw "[ERROR] Creating SSL context ";
+        throw string("[ERROR] Creating SSL context ");
     }
 
     // Load the server's certificate and private key files
     if (SSL_CTX_use_certificate_file(fds, cert.c_str(), SSL_FILETYPE_PEM) <= 0) {
-        throw "[ERROR] Loading certificate file ";
+        throw string("[ERROR] Loading certificate file ");
     }
 
     if (SSL_CTX_use_PrivateKey_file(fds, priv.c_str(), SSL_FILETYPE_PEM) <= 0) {
-        throw "[ERROR] Loading private key file ";
+        throw string("[ERROR] Loading private key file ");
     }
 
 }
@@ -105,9 +149,9 @@ 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) {
-        throw "[ERROR] Unable to open TCP socket ";
+    conn = socket(AF_INET, SOCK_STREAM, 0);
+	if (conn < 0) {
+        throw string("[ERROR] Unable to open TCP socket ");
 	}
 
     const string _address = isIPAddress(address) ? address : ipFromDomain(address);
@@ -116,31 +160,82 @@ 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) {
-        throw "Unable to connect to server ";
+    if (connect(conn, (struct sockaddr*)&addr, sizeof(struct sockaddr_in)) != 0) {
+        throw string("Unable to connect to server ");
     }
 
     struct timeval tv;
-    tv.tv_sec = 0;
-    tv.tv_usec = timeout*1000;
+    tv.tv_sec = timeout/1000;
+    tv.tv_usec = (timeout%1000)*1000;
 
-    if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
-        throw "[ERROR] Unable to set timeout ";
+    if (setsockopt(conn, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
+        throw string("[ERROR] Unable to set timeout ");
     }
 
     if (securefds) {
         ssl = SSL_new(securefds);
         if (!ssl) {
-            throw "[ERROR] Creating SSL object ";
+            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) {
-        SSL_free(ssl);
-        throw "[ERROR] Performing SSL handshake ";
+        if (SSL_connect(ssl) <= 0) {
+            SSL_free(ssl);
+            throw string("[ERROR] Performing SSL handshake ");
+        }
     }
+    
+
+}
+
+/**
+ * Konstruktor varijable tipa commint
+ * Prima pokazivač na inicijaliziranu varijablu tipa, port, 
+ * i opcijonalno dozvoljeno vrijeme čekanja servera i deskriptor datoteke
+ * SSL certifikat za sigurne komunikacije
+*/
+
+
+client::client(const server *_srv, const uint timeout, SSL_CTX* securefds) {
+    srv = _srv;
+    socklen_t len = sizeof(struct sockaddr_in);
+
+    if ((conn = accept(srv->sock, (struct sockaddr *)&(srv->addr), (socklen_t*)&len)) < 0) {
+        throw string("[ERROR] Unable to accept client connection ");
+    }
+
+    struct timeval tv;
+    tv.tv_sec = timeout/1000;
+    tv.tv_usec = (timeout%1000)*1000;
+
+    if (setsockopt(conn, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
+        throw string("[ERROR] Unable to set timeout ");
+    }
+
+
+    if (securefds) {
+        ssl = SSL_new(securefds);
+        if (!ssl) {
+            throw string("[ERROR] Creating SSL object ");
+        }
+        SSL_set_fd(ssl, conn);
+
+        // Perform SSL handshake
+        if (SSL_accept(ssl) <= 0) {
+            SSL_free(ssl);
+            throw string("[ERROR] Performing SSL handshake ");
+        }
+    }    
+
+    char ipv4_buff[INET_ADDRSTRLEN];
+    char ipv6_buff[INET6_ADDRSTRLEN];
+
+    inet_ntop(AF_INET, &(srv->addr.sin_addr), ipv4_buff, INET_ADDRSTRLEN);
+    ipv4 = ipv4_buff;
+    inet_ntop(AF_INET6, &(srv->addr.sin_addr), ipv6_buff, INET6_ADDRSTRLEN);
+    ipv6 = ipv6_buff;
+
 
 }
 
@@ -156,12 +251,12 @@ client::~client () {
         SSL_free(ssl);
     }
 
-    if (sock <= 0) {
-        throw "[ERROR] The socket is already closed "; 
+    if (conn <= 0) {
+        throw string("[ERROR] The socket is already closed "); 
     }
 
-    else if (close(sock) != 0) {
-        throw "[ERROR] Unable to close socket ";
+    else if (close(conn) != 0) {
+        throw string("[ERROR] Unable to close socket ");
     }
 
 }
@@ -173,13 +268,13 @@ client::~client () {
 */
 
 
-bool client::tell (const string msg) {
+bool client::push (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());
+        sended = write(conn, msg.c_str(), msg.length());
     }
     return sended == msg.length();
 }
@@ -190,115 +285,9 @@ bool client::tell (const string msg) {
  * Vraća string primljene poruke
 */
 
-string client::obey (size_t byte_limit) {
+string client::pull (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, 
- * i opcijonalno dozvoljeno vrijeme čekanja servera i deskriptor datoteke
- * SSL certifikat za sigurne komunikacije
-*/
-
-
-comming::comming(const server *_srv, const uint timeout, SSL_CTX* securefds) {
-    srv = _srv;
-    socklen_t len = sizeof(struct sockaddr_in);
-
-    if ((conn = accept(srv->sock, (struct sockaddr *)&(srv->addr), (socklen_t*)&len)) < 0) {
-        throw "[ERROR] Unable to accept client connection ";
-    }
-
-    struct timeval tv;
-    tv.tv_sec = 1;		// za sad 2 sekunde timeout, harkodirano
-    tv.tv_usec = 0;
-
-    if (setsockopt(conn, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(struct timeval))) {
-        throw "[ERROR] Unable to set timeout ";
-    }
-
-
-    if (securefds) {
-        ssl = SSL_new(securefds);
-        if (!ssl) {
-            throw "[ERROR] Creating SSL object ";
-        }
-        SSL_set_fd(ssl, conn);
-        // Perform SSL handshake
-        if (SSL_accept(ssl) <= 0) {
-            SSL_free(ssl);
-            throw "[ERROR] Performing SSL handshake ";
-        }
-    }    
-
-    char ipv4_buff[INET_ADDRSTRLEN];
-    char ipv6_buff[INET6_ADDRSTRLEN];
-
-    inet_ntop(AF_INET, &(srv->addr.sin_addr), ipv4_buff, INET_ADDRSTRLEN);
-    ipv4 = ipv4_buff;
-    inet_ntop(AF_INET6, &(srv->addr.sin_addr), ipv6_buff, INET6_ADDRSTRLEN);
-    ipv6 = ipv6_buff;
-
-
-}
-
-/**
- * Destruktor varijable tipa comming
-*/
-
-comming::~comming() {
-
-    if (ssl) {
-        SSL_shutdown(ssl);
-        SSL_free(ssl);
-    }
-
-    if (conn <= 0) {
-        throw "[ERROR] The socket is already closed "; 
-    }
-
-    else if (close(conn) != 0) {
-        throw "[ERROR] Unable to close socket ";
-    }
-}
-
-/**
- * Metoda klase comming 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;
-    if (ssl) {
-       sended = SSL_write(ssl, msg.c_str(), msg.length());
-    }
-    else {
-        sended = write(conn, msg.c_str(), msg.length());
-    }
-    return sended == msg.length();
-}
-
-
-/**
- * Metoda klase comming za primanje poruke preko soketa
- * Prima dozvoljeni broj karaktera koji će primiti
- * Vraća string primljene poruke
-*/
-
-string comming::obey (size_t byte_limit) {
-    char res[byte_limit] = {0};
-
     if (ssl) {
         SSL_read(ssl, res, byte_limit);
     }
@@ -306,5 +295,8 @@ string comming::obey (size_t byte_limit) {
         read(conn , res, byte_limit);
     }
 
-    return (string) res;
+    return string(res);
 }
+
+
+

test/client.cpp

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <string>
 
 #include "../lib/tcp_socket.hpp"
 
@@ -8,11 +9,35 @@ int main() {
 
     try {
 
-    secure crypto;
-    client myserver("localhost", 5000, 500, crypto.fds);
-    string sends = "Hello world!";
-    cout << myserver.tell(sends) << " " << sends.length() << endl;
-    cout << myserver.obey();
+        uint n = 10000;
+
+        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;
+
+
+        // string sends = "Hello world!";
+        // cout << myserver.push(sends) << " " << sends.length() << endl;
+        // cout << "wait client " << endl;
+
+        // cout << myserver.pull();
 
     }
     catch (const string err) {

test/server.cpp

@@ -5,35 +5,67 @@
 using namespace std;
 
 int main() {
-try{
-    cout << "init server " << endl;
-    server myserver(5000, 10);
-    cout << "init cert " << endl;
-    secure crypto ("../example/cert.pem", "../example/privkey.pem");
-    cout << "init client " << endl;
+    try{
+        // 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;
 
-    comming myclient(&myserver, 1000, crypto.fds);
-    cout << "wait client " << myclient.ipv4 << 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 =  myclient.obey();
-    cout << "tell client " << fromclient << endl;
-    sleep(5);
-    myclient.tell(fromclient);
-    // myclient.~comming();
+        // 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) {
-    //     comming myclient(&myserver, 1000);
-    //     string fromclient =  myclient.obey();
-    //     cout << fromclient << " " << myclient.conn << endl;
-    //     cout << "Poslano: " << myclient.tell(fromclient) << "Veličin: " << fromclient.length() << endl;
-    //     // myclient.~comming();
-    //     cout << "IPv4 " << myclient.ipv4 << " ipv6 " << myclient.ipv6;
-    // }
+        // while (true) {
+        //     comming myclient(&myserver, 1000);
+        //     string fromclient =  myclient.obey();
+        //     cout << fromclient << " " << myclient.conn << endl;
+        //     cout << "Poslano: " << myclient.tell(fromclient) << "Veličin: " << fromclient.length() << endl;
+        //     // myclient.~comming();
+        //     cout << "IPv4 " << myclient.ipv4 << " ipv6 " << myclient.ipv6;
+        // }
 
-    // sleep(80);
-}
-catch(const string err) {
-    cout << err << endl;
-}
+        // 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;
+    }
     return 0;
 }