base

.gitignore

@@ -50,3 +50,8 @@ modules.order
 Module.symvers
 Mkfile.old
 dkms.conf
+
+.directory
+.clang-format
+.projectile
+.vscode

Makefile

@@ -0,0 +1,22 @@
+all: ftp
+
+#The following lines contain the generic build options
+CC=gcc
+CPPFLAGS=
+CFLAGS=-g -Werror-implicit-function-declaration
+
+#List all the .o files here that need to be linked 
+OBJS=ftp.o network.o
+
+
+network.o: network.c network.h common.h
+
+ftp.o: ftp.c ftp.h common.h network.h
+
+
+ftp: $(OBJS) 
+ $(CC) -o ftp $(OBJS) $(CLIBS)
+
+clean:
+ rm -f *.o
+ rm -f ftp

common.h

@@ -0,0 +1,7 @@
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+
+#define BUF_SIZE 1024
+
+#endif

ftp.c

@@ -0,0 +1,119 @@
+#include "ftp.h"
+#include "network.h"
+#include <strings.h>
+unsigned int sfd; // Control Connection fd
+
+int main (int argc, char *argv[])
+{
+ char line[MAX_LINE]; // stores terminal commands
+ char *command, *parameter;
+ int c;
+ // 1 program
+ // 2 server
+ // 3 port
+ if (argc < 2 || argc > 3) {
+ fprintf (stderr, "Usage: %s <host> <port>\n", argv[0]);
+ fprintf (stderr, " <host> The address of the ftp server.\n");
+ fprintf (stderr, " <port> Optional: Specifies the port the client should initiate connection on.\n");
+ return -1;
+ }
+
+ const char *port = argc == 3 ? argv[2] : DEFAULT_PORT;
+
+ sfd = create_connection (argv[1], port);
+
+ if (sfd < 0)
+ exit (EXIT_FAILURE);
+
+ char buffer[BUFSIZ];
+ memset (buffer, 0, BUFSIZ);
+
+ if (read_response (buffer) <= 0)
+ exit (EXIT_FAILURE);
+
+ printf ("--> %s", buffer);
+
+ while (1) {
+ // show prompt, but only if input comes from a terminal
+ if (isatty (STDIN_FILENO))
+ printf ("> ");
+
+ if (!fgets (line, sizeof (line), stdin))
+ break;
+
+ if (!strchr (line, '\n')) {
+ while ((c = fgetc (stdin)) != EOF && c != '\n')
+ ;
+ if (c == '\n') {
+ //printErrorCommmandTooLong(stdout);
+ fprintf (stdout, "%s", "ok");
+ continue;
+ }
+ }
+
+ command = strtok (line, " \t\n\f\r\v");
+ if (!command)
+ continue; // ignore blank lines;
+
+ // get parameters if provided
+ parameter = strtok (NULL, "\n\r");
+
+ int scode = executeCommand (command, parameter);
+ }
+ return 0;
+}
+
+int executeCommand (const char *command, const char *parameter)
+{
+ if (strcasecmp (command, "quit") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "user") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "pass") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "get") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "features") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "cd") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "nlist") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "pwd") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "put") == 0) {
+ // todo
+ }
+ else if (strcasecmp (command, "delete") == 0) {
+ // todo
+ }
+ else {
+ // todo
+ }
+}
+
+int send_msg (const char *msg)
+{
+}
+
+int read_response (char *buf)
+{
+ ssize_t length = read (sfd, buf, BUFSIZ);
+ return length;
+}
+
+// pasvr_t getPasvData()
+// {
+// }
+
+// void flush()
+// {
+// }

ftp.h

@@ -0,0 +1,15 @@
+#ifndef __FTCLIENT_H__
+#define __FTCLIENT_H__
+
+#define DEFAULT_PORT "21"
+#define MAX_LINE 256
+
+typedef struct pasv_response {
+
+} pasvr_t;
+
+int read_response (char *buf);
+int send_msg(const char *msg);
+int executeCommand(const char *command, const char *parameter);
+
+#endif

network.c

@@ -0,0 +1,51 @@
+ #include "network.h"
+ #include "common.h"
+
+int create_connection (const char *host, const char *port)
+{
+ struct addrinfo hints;
+ struct addrinfo *result, *rp;
+ int sfd, s, j;
+ size_t len;
+ ssize_t nread;
+ char buf[BUF_SIZE];
+
+ /* Obtain address(es) matching host/port */
+ memset (&hints, 0, sizeof (struct addrinfo));
+ hints.ai_family = PF_INET; /* Allow IPv4 */
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = 0;
+ hints.ai_protocol = 0; /* Any protocol */
+
+ s = getaddrinfo (host, port, &hints, &result);
+ if (s != 0) {
+ fprintf (stderr, "getaddrinfo: %s\n", gai_strerror (s));
+ return -1;
+ }
+
+ /* getaddrinfo() returns a list of address structures.
+ Try each address until we successfully connect(2).
+ If socket(2) (or connect(2)) fails, we (close the socket
+ and) try the next address. */
+
+ for (rp = result; rp != NULL; rp = rp->ai_next) {
+ sfd = socket (rp->ai_family, rp->ai_socktype,
+ rp->ai_protocol);
+ if (sfd == -1)
+ continue;
+
+ if (connect (sfd, rp->ai_addr, rp->ai_addrlen) != -1)
+ break; /* Success */
+
+ close (sfd);
+ }
+
+ if (rp == NULL) { /* No address succeeded */
+ fprintf (stderr, "Could not connect\n");
+ return -1;
+ }
+
+ freeaddrinfo (result); /* No longer needed */
+
+ return sfd;
+}

network.h

@@ -0,0 +1,14 @@
+#ifndef __NETWORK_H__
+#define __NETWORK_H__
+
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int create_connection (const char *host, const char *port);
+
+#endif

printRoutines.c

@@ -0,0 +1 @@
+

printRoutines.h

@@ -0,0 +1 @@
+