static ssize_t _osprd_write(struct file *filp, char __user *usr, size_t size,
loff_t *loff) {
osprd_info_t *d = file2osprd(filp);
if (d == NULL) {
return blkdev_write(filp, usr, size, loff);
}
char *buf = (char*)kmalloc(size, GFP_KERNEL);
if (buf == NULL) {
return -ENOMEM;
}
if (copy_from_user(buf, usr, size) != 0) {
kfree(buf);
return -EFAULT;
}
//eprintk("WRITE buf: %s\npasswd_hash: %d\n", buf, d->passwd_hash);
xor_cipher(buf, size, d->passwd_hash);
//eprintk("WRITE buf: %s\npasswd_hash: %d\n", buf, d->passwd_hash);
if (copy_to_user(usr, buf, size) != 0) {
kfree(buf);
return -EFAULT;
}
kfree(buf);
return blkdev_write(filp, usr, size, loff);
}
/*--------------------------------------------------------------------------------------------------------------------
-- FUNCTION: process_user
--
-- DATE: 2014/09/06
--
-- REVISIONS: (Date and Description)
--
-- DESIGNER: Luke Tao, Ian Lee
--
-- PROGRAMMER: Luke Tao, Ian Lee
--
-- INTERFACE: void * process_user (void * arg)
--
-- RETURNS: 0, not important
--
-- NOTES: Takes in user input, encrypts commands and sends them.
----------------------------------------------------------------------------------------------------------------------*/
void * process_user (void * arg)
{
struct client * client = (struct client *) arg;
char buffer[BUF_LENGTH];
int quit = FALSE;
int password_entered = FALSE;
//Initial Suppress Password Echoing
struct termios initial_rsettings, new_rsettings;
tcgetattr(fileno(stdin), &initial_rsettings);
new_rsettings = initial_rsettings;
new_rsettings.c_lflag &= ~ECHO;
while(!quit)
{
// First time iteration
if(!password_entered)
{
printf("Enter a password: "******"\nEnter a command: ");
strcpy(client->command, get_line(buffer, BUF_LENGTH, stdin));
if(strcmp(client->command, "quit") == 0)
{
quit = TRUE;
}
memset(buffer, 0, sizeof(buffer));
sprintf(buffer, "%s %d %s%s%s", client->password, SERVER_MODE, CMD_START, client->command, CMD_END);
printf("Sending data: %s\n", buffer);
//Encrypt the data
send_packet(xor_cipher(buffer, strlen(buffer)), strlen(buffer), get_ip_addr(NETWORK_INT), client->server_host, client->dst_port);
//clear buffer
memset(client->command, 0, BUF_LENGTH);
//sleep to allow for response before prompting for next command
usleep(2500000);
}
return 0;
}
