Protokoll beschrieben

.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

@@ -1,103 +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);
-      send(create_socket, buffer, strlen (buffer), 0);
-  } 
-  while (strcmp (buffer, "quit\n") != 0);
-  close (create_socket);
-  return EXIT_SUCCESS;
-}

myserver.c

@@ -1,575 +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>
-#include <errno.h>
-#define BUF 1024
-#define PORT 6543
-
-char *verzeichnis;
-
-struct msgNumber
-{
-   int index;
-};
-struct msgNumberArr
-{
-   int lenght;
-   int index[1024];
-};
-
-int writeUsersMessages(char username[1024], int *msgNumbs, int lenght)
-{
-   FILE *filePointer;
-   char filename[1024];
-   strcpy(filename, verzeichnis);
-   strcat(filename, username);
-   strcat(filename, ".bin");
-   printf("Start writeUsersMessages()  filename: %s\n", filename);
-   filePointer = fopen(filename, "wb");
-   /**/
-   if (!filePointer)
-   {
-      printf("\x1B[31mUser Message Speicher konnte nicht geschrieben werden!\x1B[37m\n");
-      return 0;
-   }
-   struct msgNumberArr msgNumberStruct;
-   msgNumberStruct.lenght = lenght;
-   for (int i = 0; i < lenght; i++)
-   {
-      printf("MSG NUMMBER IN writeUserMessages(): %d\n", msgNumbs[i]);
-      msgNumberStruct.index[i] = msgNumbs[i];
-   }
-   fwrite(&msgNumberStruct, sizeof(struct msgNumberArr), 1, filePointer);
-   free(msgNumbs);
-   fclose(filePointer);
-   return 1;
-}
-
-struct msgNumberArr getUserMessages(char username[1024])
-{
-   FILE *filePointer;
-   char filename[1024];
-   if ('\n' == username[strlen(username) - 1])
-   {
-      username[strlen(username) - 1] = '\0';
-   }
-   strcpy(filename, verzeichnis);
-   strcat(filename, username);
-   strcat(filename, ".bin");
-   printf("getUserMessages() Filename: %s\n", filename);
-   filePointer = fopen(filename, "rb");
-   printf("\n\nstart getUserMessages() Filename: %s, Username: %s\n\n", filename, username);
-   if (!filePointer)
-   {
-      printf("\x1B[31User Message Speicher konnte nicht gelesen werden!\x1B[37m\n");
-      struct msgNumberArr nullstruct;
-      nullstruct.lenght = 0;
-      return nullstruct;
-   }
-   int i = 0;
-   struct msgNumberArr msgNumbersStruct;
-
-   //int msgNumberArr[1024];
-
-   //printf("Vorm while\n");
-   //while(!feof(filePointer))
-   //while (fread(&msgNumbers, sizeof(struct msgNumber), 1, filePointer))
-   //{
-   //printf("Im while\n");
-
-   fread(&msgNumbersStruct, sizeof(struct msgNumberArr), 1, filePointer);
-   //}
-   //printf("Nach dem while\n");
-   fclose(filePointer);
-   return msgNumbersStruct;
-}
-
-int addUserMessage(char username[1024], int msgNumber)
-{
-   if ('\n' == username[strlen(username) - 1])
-   {
-      username[strlen(username) - 1] = '\0';
-   }
-   //username[strlen(username)-1] = "\0";
-   printf("addUserMessage(), username: %s, msgNumber: %d\n", username, msgNumber);
-   int msgNumbers[1024];
-   struct msgNumberArr msgNumbersStruct = getUserMessages(username);
-   printf("msgnumberstruct lenght: %d", msgNumbersStruct.lenght);
-   for (int i = 0; i < msgNumbersStruct.lenght; i++)
-   {
-      msgNumbers[i] = msgNumbersStruct.index[i];
-      printf("MSG NUMMBER IN addUserMessage(): %d\n", msgNumbers[i]);
-   }
-   printf("Nach getUserMessages()\n");
-   int result;
-   if (msgNumbersStruct.lenght == 0)
-   {
-      printf("Es wurden keine vorherigen Messages des Users gefunden!\n");
-      int *msgNumbs = malloc(1024);
-      msgNumbs[0] = msgNumber;
-      printf("Username in addUserMessage(): %s", username);
-      result = writeUsersMessages(username, msgNumbs, 1);
-   }
-   else
-   {
-      printf("Es wurden vorherige Messages des Users gefunden, füge neue Message an alte Messages an!\n");
-      int nMsgs = msgNumbersStruct.lenght;
-      int *newNumbers = malloc(1024);
-      newNumbers[0] = msgNumber;
-      for (int i = 1; i <= nMsgs; i++)
-      {
-         printf("addUserMessage() msg number old: %d", msgNumbers[i - 1]);
-         newNumbers[i] = msgNumbers[i - 1];
-      }
-      printf("Vor dem writeUsersMessages() username: %s", username);
-      result = writeUsersMessages(username, newNumbers, nMsgs + 1);
-      printf("Nach dem writeUsersMessages() result: %d", result);
-   }
-   //free(msgNumbers);
-   if (result == 0)
-   {
-      printf("\x1B[31mMessage konnte wegen eines fehlers, in writeUserMessages(), nicht gespeichert werden!\x1B[37m\n");
-      return 0;
-   }
-   else
-   {
-      return 1;
-   }
-}
-
-int writeMessageNumber(int number)
-{
-   FILE *filePointer;
-   char filename[1024];
-   strcpy(filename, verzeichnis);
-   strcat(filename, "msgNumber.bin");
-   filePointer = fopen(filename, "wb");
-   struct msgNumber my_record;
-   my_record.index = number;
-   printf("MSG NUMMBER IN writeMessageNumber(): %d\n", number);
-   if (!filePointer)
-   {
-      printf("\x1B[31mMessage Nummer Speicher konnte nicht geschrieben werden!\x1B[37m\n");
-      return 0;
-   }
-   fwrite(&my_record, sizeof(struct msgNumber), 1, filePointer);
-   fclose(filePointer);
-   printf("MSG NUMMBER IN writeMessageNumber() ist FERTIG!\n");
-   return 1;
-}
-
-int readLastMessageNumber()
-{
-   FILE *filePointer;
-   char filename[1024];
-   strcpy(filename, verzeichnis);
-   strcat(filename, "msgNumber.bin");
-   filePointer = fopen(filename, "rb");
-   struct msgNumber my_record;
-   if (!filePointer)
-   {
-      printf("\x1B[31mMessage Nummer Speicher wurde nicht gefunden!\n\x1B[32mNeuer Nummer Speicher wird angelegt!\x1B[37m\n");
-      int result = writeMessageNumber(1);
-      if (result == 0)
-      {
-         return 0;
-      }
-      else
-      {
-         return 1;
-      }
-   }
-   fread(&my_record, sizeof(struct msgNumber), 1, filePointer);
-   fclose(filePointer);
-   printf("MSG NUMMBER IN readLastMessageNumber(): %d\n", my_record.index);
-   return my_record.index;
-}
-
-int getNextMessageNumber()
-{
-   int msgNumber = readLastMessageNumber();
-   printf("MSG NUMMBER IN getNextMessageNumber() lastmsgNumber: %d\n", msgNumber);
-   if (msgNumber == 0)
-   {
-      printf("\x1B[31mMessage Nummer kam nicht von readLastMessageNumber()!\x1B[37m\n");
-      return 0;
-   }
-   else
-   {
-      int result = writeMessageNumber(msgNumber + 1);
-      printf("After write MEssage nummber, result: %d\n", result);
-      if (result == 0)
-      {
-         printf("\x1B[31mMessage Nummer konnte nicht gespeichert werden!\x1B[37m\n");
-         return 0;
-      }
-      else
-      {
-         printf("MSG NUMMBER IN getNextMessageNumber() FERTIG!\n");
-         return msgNumber + 1;
-      }
-   }
-}
-struct rec
-{
-   char *sender, *receiver, *betreff, *msg;
-};
-
-struct rec readFile(char filename[1024])
-{
-   FILE *filePointer;
-   char fullfilename[1024];
-   strcpy(fullfilename, verzeichnis);
-   strcat(fullfilename, filename);
-   strcat(fullfilename, ".bin");
-   filePointer = fopen(fullfilename, "rb");
-   printf("ReadFile Fullfilename: %s\n", fullfilename);
-   if (!filePointer)
-   {
-      perror("\x1B[31mFile konnte nicht gelesen werden!\x1B[37m\n");
-      //printf("\x1B[31mFile konnte nicht gelesen werden!\x1B[37m\n");
-      //struct rec nullstruct;
-      //nullstruct.sender = "0";
-      //nullstruct.receiver = "0";
-      //nullstruct.betreff = "0";
-      //nullstruct.msg = "0";
-      //return &nullstruct;
-   }
-   printf("A");
-   struct rec my_record;
-   //struct rec *my_record_p = malloc(sizeof(struct rec));
-   printf("B");
-   fread(&my_record, sizeof(struct rec), 1, filePointer);
-   printf("C");
-   fclose(filePointer);
-   printf("\nBETREFF in readFile(): %s", my_record.betreff);
-   //my_record_p->betreff = my_record.betreff;
-   //my_record_p->sender = my_record.sender;
-   //my_record_p->receiver = my_record.receiver;
-   //my_record_p->msg = my_record.msg;
-   return my_record;
-}
-
-int writeToFile(char sender[1024], char betreff[1024], char receiver[1024], char message[1024])
-{
-   FILE *filePointer;
-   char filename[1024];
-   int msgNumber = getNextMessageNumber();
-   if (msgNumber == 0)
-   {
-      printf("\x1B[31mWrite File konnte nicht geöffnet werden!\x1B[37m\n");
-      return 0;
-   }
-   else
-   {
-      printf("MSG NUMMBER found, schreibe file mit msgNummber: %d!\n", msgNumber);
-      strcpy(filename, verzeichnis);
-      char msgNumberStr[1024];
-      sprintf(msgNumberStr, "%d", msgNumber);
-      strcat(filename, msgNumberStr);
-      strcat(filename, ".bin");
-      printf("\nwriteToFile() Filename: %s\n", filename);
-      filePointer = fopen(filename, "wb");
-      struct rec my_record;
-      if (!filePointer)
-      {
-         printf("\x1B[31mWrite File konnte nicht geöffnet werden!\x1B[37m\n");
-         return 0;
-      }
-      else
-      {
-         my_record.sender = sender;
-         my_record.receiver = receiver;
-         my_record.betreff = betreff;
-         my_record.msg = message;
-         printf("Vor useradd() in writeToFile()! sender: %s, msgnumber: %d, msg: %s, betrf: %s, empf: %s\n", sender, msgNumber, message, betreff, receiver);
-         char receiverfile[1024];
-         strcpy(receiverfile, "posteingang/");
-         strcat(receiverfile, sender);
-         int receiverresult = addUserMessage(receiverfile, msgNumber);
-         printf("receiverresult: %d", receiverresult);
-         char senderfile[1024];
-         strcpy(senderfile, "postausgang/");
-         strcat(senderfile, sender);
-         int senderresult = addUserMessage(senderfile, msgNumber);
-         printf("senderresult: %d", senderresult);
-         if (senderresult == 0 || receiverresult == 0)
-         {
-            printf("\x1B[31mKonnte die Nachricht dem User nicht hinzufügen! Das Speichern der Nachricht wird abgebrochen!\x1B[37m\n");
-            return 0;
-         }
-         else
-         {
-            fwrite(&my_record, sizeof(struct rec), 1, filePointer);
-            fclose(filePointer);
-            printf("MSG NUMMBER IN writeToFile(): %d\n", msgNumber);
-            return 1;
-         }
-      }
-   }
-}
-
-//struct rec *readFromFile(char msgNumber[1024])
-//{
-//   FILE *filePointer;
-//   char filename[1024];
-//   strcpy(filename, msgNumber);
-//   strcat(filename, ".bin");
-//   filePointer = fopen(filename, "rb");
-//   struct rec *my_record_pointer = malloc(sizeof(struct rec));
-//   struct rec my_record;
-//   if (!filePointer)
-//   {
-//      perror("\x1B[31mWrite File konnte nicht geöffnet werden!\x1B[37m\n");
-//   }
-//   else
-//   {
-//
-//      fread(&my_record, sizeof(struct rec), 1, filePointer);
-//      fclose(filePointer);
-//      printf("\n\nReadFile Number: %s Betreff: %s\n\n", msgNumber, my_record.betreff);
-//      my_record_pointer = &my_record;
-//      return my_record_pointer;
-//   }
-//}
-
-int main(int argc, char **argv)
-{
-   verzeichnis = strdup(argv[1]);
-   char *meinport = argv[2];
-   printf("\x1B[35mMein 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);
-
-   struct rec recToSave;
-   while (1)
-   {
-      printf("\x1B[36mWaiting for connections...\n");
-      new_socket = accept(create_socket, (struct sockaddr *)&cliaddress, &addrlen);
-      if (new_socket > 0)
-      {
-         printf("\x1B[32mClient connected from %s:%d...\n", inet_ntoa(cliaddress.sin_addr), ntohs(cliaddress.sin_port));
-         strcpy(buffer, "\x1B[34mWelcome to myserver, Please enter your command:\x1B[37m\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\x1B[37m\n", bufferString);
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  break;
-               case 1:
-                  last += 1;
-                  printf("\x1B[34m");
-                  printf("->SEND->Sender wurde eingegeben:\x1B[33m %s\x1B[37m\n", bufferString);
-                  char sender[1024];
-                  strcat(sender, bufferString);
-                  recToSave.sender = strdup(bufferString);
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  //recToSave.sender = sender;
-                  break;
-               case 2:
-                  last += 1;
-                  printf("\x1B[34m");
-                  printf("->SEND->Empfänger wurde eingegeben:\x1B[33m %s\x1B[37m\n", bufferString);
-                  char empf[1024];
-                  strcat(empf, bufferString);
-                  recToSave.receiver = strdup(bufferString);
-                  //recToSave.receiver = empf;
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  break;
-               case 3:
-                  last += 1;
-                  printf("\x1B[34m");
-                  printf("->SEND->Betreff wurde eingegeben:\x1B[33m %s\x1B[37m\n", bufferString);
-                  char betreff[1024];
-                  strcat(betreff, bufferString);
-                  recToSave.betreff = strdup(bufferString);
-                  //recToSave.betreff = betreff;
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  break;
-               case 4:
-                  last = 0;
-                  mode = 0;
-                  printf("\x1B[34m");
-                  printf("->SEND->Nachricht wurde eingegeben:\x1B[33m %s\x1B[37m\n", bufferString);
-                  char msg[1024];
-                  strcat(msg, bufferString);
-                  recToSave.msg = strdup(bufferString);
-                  //recToSave.msg = msg;
-                  printf("BUFFER STRING: %s", bufferString);
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  printf("Sender: %s, Empf: %s, Betreff: %s, MSG: %s", recToSave.sender, recToSave.receiver, recToSave.betreff, recToSave.msg);
-                  int returnWrite = writeToFile(recToSave.sender, recToSave.betreff, recToSave.receiver, recToSave.msg);
-                  if (returnWrite == 0)
-                  {
-                     printf("\x1B[31mNachricht konnte nicht gespeichert werden!\x1B[33m\n");
-                  }
-                  else
-                  {
-                     printf("\x1B[32mNachricht wurde gespeichert!\x1B[33m\n");
-                  }
-                  break;
-               }
-            }
-            else if (strncmp(bufferString, "list", 4) == 0 || mode == 2)
-            {
-               switch (last)
-               {
-               case 0:
-                  last += 1;
-                  mode = 2;
-                  printf("\x1B[34m");
-                  printf("->LIST:\x1B[33m %s\x1B[37m\n", bufferString);
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  break;
-               case 1:
-                  last = 0;
-                  mode = 0;
-                  printf("\x1B[34m");
-                  printf("->LIST->Username wurde eingegeben:\x1B[33m %s\x1B[37m\n", bufferString);
-                  char *username;
-                  username = strdup(bufferString);
-                  char filename[1024];
-                  strcpy(filename, "posteingang/");
-                  strcat(filename, username);
-                  printf("Filename: %s ENDE\n", filename);
-
-                  struct msgNumberArr msgNumbersStruct = getUserMessages(filename);
-                  printf("msgnumberstruct lenght: %d\n", msgNumbersStruct.lenght);
-                  printf("0\n");
-                  printf("0.1\n");
-                  struct rec userFilesStruct[1024];
-                  printf("1\n");
-                  for (int i = 0; i < msgNumbersStruct.lenght; i++)
-                  {
-
-                     printf("2.1&2.%d\n", i);
-                     char filename[1024];
-                     printf("2.3.%d\n", i);
-                     sprintf(filename, "%d", msgNumbersStruct.index[i]);
-                     printf("2.4.%d\n", i);
-                     struct rec my_record_p = readFile(filename);
-                     printf("2.5.%d\n", i);
-                     printf("\n\nNachricht: %d Betreff: %s\n\n", i, my_record_p.betreff);
-                     userFilesStruct[i] = my_record_p;
-                     printf("2.6.%d\n", i);
-                  }
-                  printf("3\n");
-
-                  filename[1024];
-                  strcpy(filename, "postausgang/");
-                  strcat(filename, username);
-                  printf("Filename: %s ENDE\n", filename);
-
-                  struct msgNumberArr msgNumbersStructAusgang = getUserMessages(filename);
-                  printf("msgnumberstruct lenght: %d\n", msgNumbersStructAusgang.lenght);
-                  printf("0\n");
-                  printf("0.1\n");
-                  struct rec userFilesStructAusgang[1024];
-                  printf("1\n");
-                  for (int i = 0; i < msgNumbersStructAusgang.lenght; i++)
-                  {
-
-                     printf("2.1&2.%d\n", i);
-                     char filename[1024];
-                     printf("2.3.%d\n", i);
-                     sprintf(filename, "%d", msgNumbersStructAusgang.index[i]);
-                     printf("2.4.%d\n", i);
-                     struct rec my_record_p = readFile(filename);
-                     printf("2.5.%d\n", i);
-                     printf("\n\nNachricht: %d Betreff: %s\n\n", i, my_record_p.betreff);
-                     userFilesStructAusgang[i] = my_record_p;
-                     printf("2.6.%d\n", i);
-                  }
-                  printf("3\n");
-                  bufferString[0] = '\0';
-                  buffer[0] = '\0';
-                  fflush(stdout);
-                  break;
-               }
-            }
-            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("\x1B[33mClient closed remote socket\x1B[37m\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 +1,47 @@
+
+# Protokoll 🔧
+
+```
+Als erstes muss der User immer der Befehl eingegeben (send, read, list oder delete). Danach schreibt der Client 
+immer eine Zeile, was der User als nächstes eingeben soll. Die Buffer Strings der Befehle sind folgerndermaßen 
+aufgebaut:
+
+SEND: send;sender;empänger;betreff;nachricht
+LIST: list;username;postEinAusgang
+READ: read;username;postEinAusgang;nid
+DEL: del;username;postEinAusgang;nid
+
+Der Buffer wird immer als Ganzes (wie oben beschrieben) vom Client an den Server übertragen (nicht Blockweise).
+Der Client fügt die Usereingaben als String zusammen und trennt sie mit einem ";". Der Server splittet den Befehl
+dann anhand des Delimiters ";" und geht jedes einzelne Attribut (z.B. username, nid) in einer Schleife durch und
+führt den entsprechende Aktionen aus. Als erstes Attribut steht immer der Befehl, damit der Server sofort erkennt,
+welche Aktion er ausführen soll. Die nid (Nachrichten ID) wird am Server erzeugt und setzt sich aus einem Timestamp
++ dem Betreff zusammen.
+
+Bei send und delete sendet der Server entweder OK oder ERR zurück. Bei list, die Anzahl der Nachrichten und pro
+Zeile den Betreff. Bei read wird die gesamte Nachricht (nid, Sent From/To, Betreff, Nachricht) zurückgesendet.
+
+Am Server gibt es die Verzeichnisse Posteingang und Postausgang. Darin sind Verzeichniss mit den jeweiligen
+Usernamen und darin befinden sich .txt Dateien mit den Nachrichten.
+
+Eine Nachricht wird zb. folgerndermaßen am Server gespeichert:
+
+ID: 2020-10-2918:05:32hallo
+Sent to: if20b206
+Betreff: hallo
+Message: wie gehts
+
+```
+
+# Installation
+```
+sudo apt-get install ldap-utils
+sudo apt-get install libldap
+sudo apt-get update -y
+sudo apt-get install -y libldap-dev
+```
+
+# Erstellt von 
+
+* Lukas Nowy
+* Georg Reisinger