Startpunkten

c_stub.c

@@ -0,0 +1,259 @@
+/* ***************************************** */
+
+/*  Laboration 2 i Datakommunikation 2       */
+
+/*    RPC-lib                                */
+
+/* ***************************************** */
+
+/*  c_stub.c                                 */
+
+/*    Klientapplikation som skickar          */
+
+/*    kommandon till servern                 */
+
+/* ***************************************** */
+
+/*  Christian Ohlsson, di7chro@cse.kau.se    */
+
+/*  Stefan Sonesson,   di7stes@cse.kau.se    */
+
+/* ***************************************** */
+
+
+
+#include "header.h"
+
+
+
+/* Globala variabler */
+
+int fd=-1, sock; /* fd kommer ihåg om någon fil är öppen */
+
+msg myMsg;       /* Meddelandet som funktionerna fyller i */
+
+
+
+/* ============================================== 
+
+   in_connect() 
+
+   Gör en uppkoppling mot en server 
+
+   ============================================== */
+
+void in_connect() {
+
+	char *remhost;
+
+	u_short remport;	
+
+	struct sockaddr_in remote;
+
+	struct hostent *h;
+
+	/* Skapa en socket att skicka data på */
+
+	if((sock = socket(AF_INET, SOCK_STREAM, 0 )) < 0 ) {
+
+		perror("client:socket");
+
+		exit(1);
+
+	}
+
+	remport = 8704;
+
+	/* Nolla ut structen */
+
+	bzero((char *) &remote, sizeof(remote));
+
+	remote.sin_family = AF_INET;
+
+	/* Fyll i hostent structen */
+
+	if((h = gethostbyname(myMsg.machine)) == NULL) {
+
+		perror("client:gethostbyname");
+
+		exit(1);
+
+	}
+
+	bcopy((char *)h->h_addr, (char *)&remote.sin_addr, h->h_length);
+
+	remote.sin_port = htons(remport);
+
+	/* Begär uppkoppling mot servern */
+
+	if(connect(sock, (struct sockaddr *)&remote, sizeof(remote)) < 0) {
+
+		perror("client:connect");
+
+		exit(1);
+
+	}
+
+}
+
+
+
+/* ============================================== 
+
+   in_open() 
+
+   Letar fram server och fil att öppna 
+
+   ============================================== */
+
+int in_open() {
+
+	int i,j,k=0;
+
+	char this_machine[BUFSIZE], this_path[BUFSIZE], filename[BUFSIZE];
+
+	if(fd<0) {
+
+		printf("Enter filename: ");
+
+		fgets(filename, sizeof(filename), stdin);
+
+		for(i = 0; i < BUFSIZE; i++) {
+
+			if(filename[i] != '/')
+
+				this_machine[i] = filename[i];
+
+			else {
+
+				this_machine[i] = 0;
+
+				break;
+
+			}
+
+		}	
+
+		for(; i < BUFSIZE ; i++) {
+
+			if(filename[i] != 10) {
+
+				this_path[k] = filename[i];
+
+				k++;
+
+			}
+
+			else {
+
+				this_path[k] = 0;
+
+				break;
+
+			}
+
+		}
+
+		myMsg.op = OP;
+
+		if(filename[0] == '/')                /* Lokal fil */
+
+			strcpy(this_machine, "localhost");
+
+		strcpy(myMsg.machine, this_machine);
+
+		strcpy(myMsg.path, this_path);
+
+		in_connect(myMsg);
+
+	}
+
+	else {
+
+		puts("A file is already open!");
+
+		sleep(SLEEPTIME);
+
+		return FALSE;
+
+	}
+
+	return TRUE;
+
+}
+
+
+
+/* ============================================== 
+
+   in_read() 
+
+   Sätter operatorn till READ 
+
+   ============================================== */
+
+int in_read() {
+
+	if(fd > 0)
+
+		myMsg.op = RD;
+
+	else {
+
+		puts("No file is open!");
+
+		sleep(SLEEPTIME);
+
+		return FALSE;
+
+	}
+
+	return TRUE;
+
+}
+
+
+
+/* ============================================== 
+
+   in_write() 
+
+   Frågar hur mycket som skall skrivas och 
+
+   sätter operatorn 
+
+   ============================================== */
+
+int in_write() {
+
+	char buf[BUFSIZE];
+
+	int length = 0;
+
+	if(fd>0) {
+
+		printf("How many bytes do you wish to write: ");
+
+		gets(buf);
+
+		length = atoi(buf);
+
+		printf("Enter text: ");
+
+		if((myMsg.data = (char*)malloc(length)) < 0) {
+
+			perror("Malloc fel, byt minnesskretsarna, eller skaffa fler\n");
+
+			return FALSE;
+
+		}
+
+		myMsg.length = length;
+
+		gets(myMsg.data);
+
+		myMsg.op = WR;
+
+	}
+
+	else {