Blocked Clients, Colored Console, Auto Dir Create

.gitignore

@@ -0,0 +1 @@
+.vscode/

client.c

@@ -0,0 +1,248 @@
+/* myclient.c */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <termios.h>
+#define BUF 1024
+
+void remN(char *s) {
+    char *p2 = s;
+    while(*s != '\0') {
+        if(*s != '\t' && *s != '\n') {
+            *p2++ = *s++;
+        } else {
+            ++s;
+        }
+    }
+    *p2 = '\0';
+}
+
+bool startsWith(const char *pre, const char *str)
+{
+    size_t lenpre = strlen(pre),
+           lenstr = strlen(str);
+    return lenstr < lenpre ? false : memcmp(pre, str, lenpre) == 0;
+}
+
+int main (int argc, char **argv) {
+   int create_socket;
+   char buffer[BUF];
+   struct sockaddr_in address;
+   int size;
+
+   if( argc < 3 ){
+      printf("Usage: %s ServerAdresse Port\n", argv[0]);
+      exit(EXIT_FAILURE);
+   }
+   if ((create_socket = socket (AF_INET, SOCK_STREAM, 0)) == -1)
+   {
+      perror("Socket error");
+      return EXIT_FAILURE;
+   }
+   memset(&address,0,sizeof(address));
+   address.sin_family = AF_INET;
+   address.sin_port = htons (atoi(argv[2]));
+   inet_aton (argv[1], &address.sin_addr);
+   if (connect ( create_socket, (struct sockaddr *) &address, sizeof (address)) == 0)
+   {
+      printf ("\x1b[32mConnection with server (%s) established\n\x1b[0m", inet_ntoa (address.sin_addr));
+      size=recv(create_socket,buffer,BUF-1, 0);
+      if (size>0)
+      {
+         buffer[size]= '\0';
+         printf("\x1b[36m%s\x1b[0m",buffer);
+      }
+   }
+   else
+   {
+      perror("\x1b[31mConnect error - no server available\x1b[0m");
+      return EXIT_FAILURE;
+   }
+   bool login = false;
+   do {
+      //command vom user überprüfen
+      char command[7] = "";
+      printf ("\n\x1b[35mEnter Command:\x1b[0m \n");
+      fgets (command, 7, stdin);
+
+      if (startsWith("login", command) == true && login == false)
+      {
+            char username[10] = "";
+            char pw[50] = "";
+            char bufferString[BUF] = "";
+            strcpy(bufferString, "login;");
+            //User Dateneingabe und daten einlesen
+            printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
+            fgets (username, 10, stdin);
+            printf("\x1b[35m<Passwort max. 50 Zeichen>\x1b[0m\n");
+            //PW eingabe unsichtbar machen
+            struct termios term, term_orig;
+            tcgetattr(STDIN_FILENO, &term);
+            term_orig = term;
+            term.c_lflag &= ~ECHO;
+            tcsetattr(STDIN_FILENO, TCSANOW, &term);
+            scanf("%s", pw);
+            // Eingabe wieder sichtbar schalten
+            tcsetattr(STDIN_FILENO, TCSANOW, &term_orig);
+
+            strcat(bufferString, username);
+            strcat(bufferString, ";");
+            strcat(bufferString, pw);
+            remN(bufferString);
+            send(create_socket, bufferString, strlen (bufferString), 0);
+            //Response vom Server (OK oder ERR) empfangen und ausgeben
+            char readBuffer[BUF] = "";
+            read(create_socket , readBuffer, 1023); 
+            remN(readBuffer);
+            if (strcmp("OK", readBuffer) == 0)
+            {
+               printf("\n\x1b[32m%s\x1b[0m\n", readBuffer);
+               login = true;
+            }else if (strcmp("ERR", readBuffer) == 0 || strcmp("Client Gesperrt", readBuffer) == 0)
+            {
+               printf("\n\x1b[31m%s\x1b[0m\n", readBuffer);
+            }
+      }else if (login == false && startsWith("quit", command) == true)
+      {
+         strcpy(buffer, "quit\n");
+      }else if (login == false)
+      {
+         printf("\x1b[33mBitte zuerst <login> eingeben. Erst danach können sie auf das Program zugreifen!\x1b[0m\n");
+      }
+      if(login == true){
+         //je nach command wird was audgeführt
+         if(startsWith("send", command) == true) {
+            char sender[10] = "";  
+            char empfaenger[10] = "";
+            char betreff[82] = "";
+            char nachricht[128] = "";
+            char bufferString[BUF] = "";
+            strcpy(bufferString, "");
+            strcat(bufferString, "send");
+            //User Dateneingabe und daten einlesen
+            printf("\x1b[35m<Sender max. 8 Zeichen>\x1b[0m\n");
+            fgets (sender, 10, stdin);
+            printf("\x1b[35m<Empfänger max. 8 Zeichen>\x1b[0m\n");
+            fgets (empfaenger, 10, stdin);
+            printf("\x1b[35m<Betreff max. 80 Zeichen>\x1b[0m\n");
+            fgets (betreff, 82, stdin);
+            printf("\x1b[35m<Nachricht, beliebige Anzahl an Zeilen>\x1b[0m\n");
+            fgets (nachricht, 82, stdin);
+            //Buffer formatieren
+            strcat(bufferString, ";");
+            strcat(bufferString, sender);
+            strcat(bufferString, ";");
+            strcat(bufferString, empfaenger);
+            strcat(bufferString, ";");
+            strcat(bufferString, betreff);
+            strcat(bufferString, ";");
+            strcat(bufferString, nachricht);
+            remN(bufferString);
+            send(create_socket, bufferString, strlen (bufferString), 0);
+            //Response vom Server (OK oder ERR) empfangen und ausgeben
+            char readBuffer[BUF] = "";
+            read(create_socket , readBuffer, 1024); 
+            printf("\n%s\n", readBuffer);
+         }else if(startsWith("list", command) == true) {
+            char bufferString[BUF] = "list";
+            char username[10] = "";
+            char p[22] = "";
+            int counter = 0;
+            printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
+            fgets (username, 10, stdin);
+            printf("\x1b[35m<Posteingang oder Postausgang>\x1b[0m\n");
+            fgets (p, 22, stdin);
+
+            strcat(bufferString, ";");
+            strcat(bufferString, username);
+            strcat(bufferString, ";");
+            strcat(bufferString, p);
+            remN(bufferString);
+            send(create_socket, bufferString, strlen (bufferString), 0);
+
+            char readBuffer[BUF] = "";
+            read(create_socket , readBuffer, 1024); 
+
+            char delimiter[] = ";";
+            char *ptr;
+            ptr = strtok(readBuffer, delimiter);
+
+            while(ptr != NULL) {
+               if(strcmp(ptr, ".") == 0) {
+                  
+               }else if(strcmp(ptr, "..") == 0) {
+                  
+               }else if (counter == 0) {
+                  printf("\x1b[35m<Anzahl der Nachrichten für den User: %s>\x1b[0m\n", ptr);
+               }else {
+                  printf("Betreff: %s \n", ptr);
+               }
+               counter = counter + 1;
+               // naechsten Abschnitt erstellen
+               ptr = strtok(NULL, delimiter);
+            }
+         }else if(startsWith("read", command) == true) {
+            char bufferString[BUF] = "read";
+            char username[10] = "";
+            char nid[82] = "";
+            char folder[22] = "";
+
+            printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
+            fgets (username, 10, stdin);
+            printf("\x1b[35m<posteingang oder postausgang>\x1b[0m\n");
+            fgets (folder, 22, stdin);
+            printf("\x1b[35m<Nachrichten-Nummer>\x1b[0m\n");
+            fgets (nid, 82, stdin);
+
+            strcat(bufferString, ";");
+            strcat(bufferString, username);
+            strcat(bufferString, ";");
+            strcat(bufferString, folder);
+            strcat(bufferString, ";");
+            strcat(bufferString, nid);
+            remN(bufferString);
+
+            send(create_socket, bufferString, strlen (bufferString), 0);
+            char readBuffer[BUF] = "";
+            read(create_socket , readBuffer, 1000); 
+            printf("\n%s\n", readBuffer ); 
+         }else if(startsWith("del", command) == true) {
+            char username[10] = "";  
+            char nachrichtennummer[82] = "";
+            char bufferString[BUF] = "del";
+            char p[22] = "";
+
+            printf("\x1b[35m<Username max. 8 Zeichen>\x1b[0m\n");
+            fgets (username, 10, stdin);
+            printf("\x1b[35m<Posteingang oder Postausgang>\x1b[0m\n");
+            fgets (p, 22, stdin);
+            printf("\x1b[35m<Nachrichten-Nummer>\x1b[0m\n");
+            fgets (nachrichtennummer, 82, stdin);
+
+            strcat(bufferString, ";");
+            strcat(bufferString, username);
+            strcat(bufferString, ";");
+            strcat(bufferString, p);
+            strcat(bufferString, ";");
+            strcat(bufferString, nachrichtennummer);
+            remN(bufferString);
+            send(create_socket, bufferString, strlen (bufferString), 0);
+            char readBuffer[BUF] = "";
+            read(create_socket , readBuffer, 1024); 
+            printf("\n%s\n", readBuffer ); 
+         }else if(startsWith("quit", command) == true) {
+            strcpy(buffer, "quit\n");
+         }else {
+            printf("DAS IST KEIN COMMAND!!!!!");
+         }
+      }
+   }while (strcmp (buffer, "quit\n") != 0);
+   close (create_socket);
+   return EXIT_SUCCESS;
+}

makefile

@@ -0,0 +1,26 @@
+#Client und Server kompilieren
+all: server.c client.c
+	gcc -Wall -o server server.c -lldap -llber -lpthread
+	gcc -Wall -o client client.c -lldap -llber -lpthread
+
+	
+#Kompilierten Client und Server löschen	
+clean: client server
+	rm -f client server
+
+#Nur den Client kompilieren:
+client: client.c
+	gcc -Wall -o client client.c -lldap -llber -lpthread
+
+#Nur den Server kompilieren:
+server: server.c
+	gcc -Wall -o server server.c -lldap -llber -lpthread
+
+#Kompilierten Server löschen	
+cleanS: server
+	rm -f server
+
+#Kompilierten Client löschen	
+cleanC: client
+	rm -f client
+

myclient.c

@@ -1,104 +0,0 @@
-/* myclient.c */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#define BUF 1024
-#define PORT 6543
-
-int main (int argc, char **argv) {
-  char* meinport = argv[2];
-  int create_socket;
-  char buffer[BUF];
-  struct sockaddr_in address;
-  int size;
-
-  if( argc < 2 ){
-     printf("Usage: %s ServerAdresse\n", argv[0]);
-     exit(EXIT_FAILURE);
-  }
-
-  if ((create_socket = socket (AF_INET, SOCK_STREAM, 0)) == -1)
-  {
-     perror("Socket error");
-     return EXIT_FAILURE;
-  }
-  
-  memset(&address,0,sizeof(address));
-  address.sin_family = AF_INET;
-  address.sin_port = htons (*meinport);
-  inet_aton (argv[1], &address.sin_addr);
-  
-
-  if (connect ( create_socket, (struct sockaddr *) &address, sizeof (address)) == 0)
-  {
-     printf ("Connection with server (%s) established\n", inet_ntoa (address.sin_addr));
-     size=recv(create_socket,buffer,BUF-1, 0);
-     if (size>0)
-     {
-        buffer[size]= '\0';
-        printf("%s",buffer);
-     }
-  }
-  else
-  {
-     perror("Connect error - no server available");
-     return EXIT_FAILURE;
-  }
-
-   int last = 0;
-   int mode = 0;
-   char bufferString[1024];
-   do {
-      char *p=getenv("USER");
-      printf("\x1B[32m");
-      printf("%s@%s:%d", p, inet_ntoa (address.sin_addr),ntohs(address.sin_port));
-      if (strncmp (bufferString, "send", 4)  == 0 || mode == 1){
-         switch (last)
-         {
-         case 0:
-            last += 1;
-            mode = 1;
-            printf("\x1B[34m");
-            printf("->SEND->Sender eingeben: \n");
-            break;
-         case 1:
-            last += 1;
-            printf("\x1B[34m");
-            printf("->SEND->Empfänger eingeben: \n");
-            break;
-         case 2:
-            last += 1;
-            printf("\x1B[34m");
-            printf("->SEND->Betreff eingeben: \n");
-            break;
-         case 3:
-            last = 0;
-            mode = 0;
-            printf("\x1B[34m");
-            printf("->SEND->Nachricht eingeben: \n");
-            break;
-         }    
-      }else if (strncmp (bufferString, "list", 4)  == 0 ){
-         printf("LIST wurde endlich erkannt!\n");
-      }else if (strncmp (bufferString, "read", 4)  == 0 ){
-         printf("READ wurde endlich erkannt!\n");
-      } else if (strncmp (bufferString, "del", 4)  == 0 ){
-         printf("DEL wurde endlich erkannt!\n");
-      }
-      printf("\033[0;33m");
-      printf("$ ");
-      printf("\x1B[37m");
-      fgets (buffer, BUF, stdin);
-      strcpy(bufferString, buffer);
-      printf("%s", bufferString);
-      send(create_socket, buffer, strlen (buffer), 0);
-  } 
-  while (strcmp (buffer, "quit\n") != 0);
-  close (create_socket);
-  return EXIT_SUCCESS;
-}

myserver.c

@@ -1,115 +0,0 @@
-/* myserver.c */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#define BUF 1024
-#define PORT 6543
-
-int main (int argc, char **argv) {
-  char* verzeichnis = argv[1];
-  char* meinport = argv[2];
-  printf("Mein server Verzeichniss: %s\n", verzeichnis);
-  printf("Mein server Port: %s\n", meinport);
-  int create_socket, new_socket;
-  socklen_t addrlen;
-  char buffer[BUF];
-  int size;
-  struct sockaddr_in address, cliaddress;
-
-  create_socket = socket (AF_INET, SOCK_STREAM, 0);
-
-  memset(&address,0,sizeof(address));
-  address.sin_family = AF_INET;
-  address.sin_addr.s_addr = INADDR_ANY;
-  address.sin_port = htons (*meinport);
-
-  if (bind ( create_socket, (struct sockaddr *) &address, sizeof (address)) != 0) {
-     perror("bind error");
-     return EXIT_FAILURE;
-  }
-  listen (create_socket, 5);
-  
-  addrlen = sizeof (struct sockaddr_in);
-
-  while (1) {
-     printf("Waiting for connections...\n");
-     new_socket = accept ( create_socket, (struct sockaddr *) &cliaddress, &addrlen );
-     if (new_socket > 0)
-     {
-        printf ("Client connected from %s:%d...\n", inet_ntoa (cliaddress.sin_addr),ntohs(cliaddress.sin_port));
-        strcpy(buffer,"Welcome to myserver, Please enter your command:\n");
-        send(new_socket, buffer, strlen(buffer),0);
-     }
-      char bufferString[BUF];
-      int last = 0;
-      int mode = 0;
-      do {
-         size = read (new_socket, buffer, BUF-1);
-         if( size > 0)
-         {
-            buffer[size] = '\0';
-            strcpy(bufferString, buffer);
-            
-            if (strncmp (bufferString, "send", 4)  == 0 || mode == 1){
-               switch (last)
-                  {
-                  case 0:
-                     last += 1;
-                     mode = 1;
-                     printf("\x1B[34m");
-                     printf("->SEND:\x1B[33m %s\n", bufferString);
-                     break;
-                  case 1:
-                     last += 1;
-                     printf("\x1B[34m");
-                     printf("->SEND->Sender wurde eingegeben:\x1B[33m %s\n", bufferString);
-                     break;
-                  case 2:
-                     last += 1;
-                     printf("\x1B[34m");
-                     printf("->SEND->Empfänger wurde eingegeben:\x1B[33m %s\n", bufferString);
-                     break;
-                  case 3:
-                     last += 1;
-                     printf("\x1B[34m");
-                     printf("->SEND->Betreff wurde eingegeben:\x1B[33m %s\n", bufferString);
-                     break;
-                  case 4:
-                     last = 0;
-                     mode = 0;
-                     printf("\x1B[34m");
-                     printf("->SEND->Nachricht wurde eingegeben:\x1B[33m %s\n", bufferString);
-                     break;
-                  }    
-            }else if (strncmp (bufferString, "list", 4)  == 0 ){
-               printf("LIST wurde endlich erkannt!\n");
-            }else if (strncmp (bufferString, "read", 4)  == 0 ){
-               printf("READ wurde endlich erkannt!\n");
-            } else if (strncmp (bufferString, "del", 4)  == 0 ){
-               printf("DEL wurde endlich erkannt!\n");
-            }else {
-               printf ("\x1B[33mBefehl wurde nicht erkannt: \x1B[31m%s\n", bufferString);
-            }
-            printf("\x1B[37m");
-         }
-         else if (size == 0)
-         {
-            printf("Client closed remote socket\n");
-            break;
-         }
-         else
-         {
-            perror("recv error");
-            return EXIT_FAILURE;
-         }
-      } while ( strncmp (buffer, "quit", 4)  != 0); 
-     close (new_socket);
-  }
-  close (create_socket);
-  return EXIT_SUCCESS;
-}

readme.md

@@ -0,0 +1,20 @@
+
+# Protokoll 🔧
+
+```
+SEND: send;sender;empänger;betreff;nachricht
+LIST: list:username;postEinAusgang
+READ: read;username;postEinAusgang;nid
+DEL: del;username;postEinAusgang;nid
+```
+
+# Installation
+```
+sudo apt-install ldap-utils
+sudo apt-get install libldap
+```
+
+# Erstellt von 
+
+* Lukas Nowy
+* Georg Reisinger