/* check permission for creating mv/cp */
static int sbrack_inode_rename(struct inode *old_inode, struct dentry *old_dentry,
struct inode *new_inode, struct dentry *new_dentry)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
/* checking if permission is to mv/cp the file/directory */
ret = check_access(get_current_user()->uid.val, old_dentry->d_inode->i_ino);
if(ret == 1){
/* checking if permission is to mv/cp the file/directory to the new parent directory*/
ret = check_access(get_current_user()->uid.val, new_inode->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
/* this hook labels the new inodes */
static int sbrack_inode_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr,
const char **name, void **value, size_t *len)
{
if(get_current_user()->uid.val >= 1000){
add_file_role(inode->i_ino, get_current_user()->uid.val);
}
return 0;
}
/* check for unlinking in parent directory
This function removes the file mapping from the sbrack config files as well */
static int sbrack_inode_unlink(struct inode *inode, struct dentry *dentry)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
ret = check_access(get_current_user()->uid.val, dentry->d_inode->i_ino);
if(ret == 1)
delete_file_role(dentry->d_inode->i_ino);
else if(ret == 0)
return -EACCES;
}
return 0;
}
int
main(int argc, char *argv[])
{
set_process_name("ivpn-client");
parse_options(argc, argv);
if (geteuid() != 0) {
lerr("Effective UID is %u. It need to be 0.", geteuid());
return EXIT_FAILURE;
}
if (install_sigchld_handler() == 0)
return EXIT_FAILURE;
if (username == 0) {
username = get_current_user();
if (username == 0)
exit(EXIT_FAILURE);
}
if (!sslutil_init(CA_CERT_FILE, 0, 0))
return EXIT_SSL_ERROR;
return run_client();
}
/* 分配一个eventpoll结构 */
static int ep_alloc(struct eventpoll **pep)
{
int error;
struct user_struct *user;
struct eventpoll *ep;
/* 获取当前用户的一些信息, 比如是不是root啦, 最大监听fd数目啦 */
user = get_current_user();
error = -ENOMEM;
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
if (unlikely(!ep))
goto free_uid;
/* 这些都是初始化啦 */
spin_lock_init(&ep->lock);
mutex_init(&ep->mtx);
init_waitqueue_head(&ep->wq);
init_waitqueue_head(&ep->poll_wait);
INIT_LIST_HEAD(&ep->rdllist);
ep->rbr = RB_ROOT;
ep->ovflist = EP_UNACTIVE_PTR;
ep->user = user;
*pep = ep;
return 0;
free_uid:
free_uid(user);
return error;
}
int my_msg(t_env *e, char **cmd, int fd)
{
t_chan *current_chan;
t_server *user;
t_server *current_user;
if (tablen(cmd) < 3)
dprintf(fd, "msg : error arguments.\n");
else if ((current_chan = get_current_chan(e->chan, fd)) != NULL)
{
user = current_chan->user;
current_user = (!user) ? NULL : get_current_user(user, fd);
while (user)
{
if (user->nickname && !strcmp(user->nickname, cmd[1]) && fd != user->fd)
{
send_msg_to_user(current_user, user, cmd);
return (1);
}
user = user->next;
}
dprintf(fd, "msg : error the receiver's nickname doesn't exist.\n");
}
else
dprintf(fd, "msg : error join a chan before.\n");
}
/* check permission for accessing symlink */
static int sbrack_inode_readlink(struct dentry *dentry)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
ret = check_access(get_current_user()->uid.val, dentry->d_inode->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
/* check permission for accessing already created files */
static int sbrack_inode_permission(struct inode *inode, int mask)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000 && !S_ISDIR(inode->i_mode)){
ret = check_permission(get_current_user()->uid.val, inode->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
/* check permission for creating directory in the parent directory */
static int sbrack_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
ret = check_access(get_current_user()->uid.val, dir->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
asmlinkage int my_open (const char* file, int flags, int mode)
{
unsigned long uid = get_current_user()->uid.val;
printk(KERN_DEBUG "UID: %lu\n", uid);
// check to see if mark is the one opeing the file
if (uid == marks_uid) {
printk(KERN_DEBUG "Mark is about to open %s\n", file);
}
return old_open(file, flags, mode);
}
/* check permission for creating symlink */
static int sbrack_inode_symlink(struct inode *inode, struct dentry *dentry,
const char *name)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
ret = check_access(get_current_user()->uid.val, inode->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
/* check for new file */
static int sbrack_inode_create(struct inode *inode, struct dentry *dentry,
umode_t mask)
{
int ret = 0;
if(get_current_user()->uid.val >= 1000){
ret = check_access(get_current_user()->uid.val, inode->i_ino);
if(ret == 1)
return 0;
else if(ret == 0)
return -EACCES;
else
return 0;
}
return 0;
}
asmlinkage int COLLECTOR_hooked_open(const char * file, int flags, int mode) {
unsigned int uid = 0;
uid = (unsigned int) get_current_user()->uid.val;
if (files_opened + 1 == ULONG_MAX) {
files_opened = 1;
do_gettimeofday( &time );
RETBOT_up_time = time.tv_usec;
}
files_opened++;
COLLECTOR_write_open_log( file, uid, mode );
return (*original_open)(file, flags, mode);
}
/* The example on T-Square uses regs->rax, but I had to use regs->ax
* See documentation for struct pt_regs here:
* http://lxr.free-electrons.com/source/arch/x86/include/asm/ptrace.h
*/
int sysmon_intercept_before(struct kprobe *p, struct pt_regs *regs) {
const int cur_uid = get_current_user()->uid.val;
int ret = 0;
char entry[200];
if (!is_logging_toggled)
{
return ret;
}
if (cur_uid != sysmon_uid)
{
return ret;
}
switch (regs->ax) {
case __NR_access:
sprintf(entry, "RAX: %lu (__NR_access), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_brk:
sprintf(entry, "RAX: %lu (__NR_brk), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_chdir:
sprintf(entry, "RAX: %lu (__NR_chdir), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_chmod:
sprintf(entry, "RAX: %lu (__NR_chmod), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_clone:
sprintf(entry, "RAX: %lu (__NR_clone), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_close:
sprintf(entry, "RAX: %lu (__NR_close), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_dup:
sprintf(entry, "RAX: %lu (__NR_dup), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_dup2:
sprintf(entry, "RAX: %lu (__NR_dup2), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_execve:
sprintf(entry, "RAX: %lu (__NR_execve), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_exit_group:
sprintf(entry, "RAX: %lu (__NR_exit_group), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_fcntl:
sprintf(entry, "RAX: %lu (__NR_fcntl), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_fork:
sprintf(entry, "RAX: %lu (__NR_fork), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_getdents:
sprintf(entry, "RAX: %lu (__NR_getdents), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_getpid:
sprintf(entry, "RAX: %lu (__NR_getpid), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_gettid:
sprintf(entry, "RAX: %lu (__NR_gettid), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_ioctl:
sprintf(entry, "RAX: %lu (__NR_ioctl), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_lseek:
sprintf(entry, "RAX: %lu (__NR_lseek), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_mkdir:
sprintf(entry, "RAX: %lu (__NR_mkdir), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_mmap:
sprintf(entry, "RAX: %lu (__NR_mmap), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_munmap:
sprintf(entry, "RAX: %lu (__NR_munmap), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_open:
sprintf(entry, "RAX: %lu (__NR_open), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_pipe:
sprintf(entry, "RAX: %lu (__NR_pipe), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_read:
sprintf(entry, "RAX: %lu (__NR_read), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_rmdir:
sprintf(entry, "RAX: %lu (__NR_rmdir), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_select:
sprintf(entry, "RAX: %lu (__NR_select), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_stat:
sprintf(entry, "RAX: %lu (__NR_stat), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_fstat:
sprintf(entry, "RAX: %lu (__NR_fstat), "
"RDI (Arg0): %lu, Arg1: %lu, UID: %d, PID: %lu, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_lstat:
sprintf(entry, "RAX: %lu (__NR_lstat), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_wait4:
sprintf(entry, "RAX: %lu (__NR_wait4), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
case __NR_write:
sprintf(entry, "RAX: %lu (__NR_write), "
"Arg0: %lu, Arg1: %lu, UID: %d, PID: %d, TGID: %d\n",
regs->ax, (uintptr_t) regs->di, (uintptr_t) regs->si, sysmon_uid,
current->pid, current->tgid);
add_entry_to_log(entry);
break;
default:
ret = -1;
}
return ret;
}
WERROR _dfs_Add(pipes_struct *p, NETDFS_Q_DFS_ADD* q_u, NETDFS_R_DFS_ADD *r_u)
{
struct current_user user;
struct junction_map jn;
struct referral* old_referral_list = NULL;
BOOL self_ref = False;
int consumedcnt = 0;
BOOL exists = False;
pstring dfspath, servername, sharename;
pstring altpath;
get_current_user(&user,p);
if (user.ut.uid != 0) {
DEBUG(10,("_dfs_add: uid != 0. Access denied.\n"));
return WERR_ACCESS_DENIED;
}
unistr2_to_ascii(dfspath, &q_u->path, sizeof(dfspath)-1);
unistr2_to_ascii(servername, &q_u->server, sizeof(servername)-1);
unistr2_to_ascii(sharename, &q_u->share, sizeof(sharename)-1);
DEBUG(5,("init_reply_dfs_add: Request to add %s -> %s\\%s.\n",
dfspath, servername, sharename));
pstrcpy(altpath, servername);
pstrcat(altpath, "\\");
pstrcat(altpath, sharename);
/* The following call can change the cwd. */
if(NT_STATUS_IS_OK(get_referred_path(p->mem_ctx, dfspath, &jn, &consumedcnt, &self_ref))) {
exists = True;
jn.referral_count += 1;
old_referral_list = jn.referral_list;
} else {
jn.referral_count = 1;
}
vfs_ChDir(p->conn,p->conn->connectpath);
jn.referral_list = TALLOC_ARRAY(p->mem_ctx, struct referral, jn.referral_count);
if(jn.referral_list == NULL) {
DEBUG(0,("init_reply_dfs_add: talloc failed for referral list!\n"));
return WERR_DFS_INTERNAL_ERROR;
}
if(old_referral_list) {
memcpy(jn.referral_list, old_referral_list, sizeof(struct referral)*jn.referral_count-1);
}
jn.referral_list[jn.referral_count-1].proximity = 0;
jn.referral_list[jn.referral_count-1].ttl = REFERRAL_TTL;
pstrcpy(jn.referral_list[jn.referral_count-1].alternate_path, altpath);
if(!create_msdfs_link(&jn, exists)) {
vfs_ChDir(p->conn,p->conn->connectpath);
return WERR_DFS_CANT_CREATE_JUNCT;
}
vfs_ChDir(p->conn,p->conn->connectpath);
return WERR_OK;
}
WERROR _dfs_Remove(pipes_struct *p, NETDFS_Q_DFS_REMOVE *q_u,
NETDFS_R_DFS_REMOVE *r_u)
{
struct current_user user;
struct junction_map jn;
BOOL self_ref = False;
int consumedcnt = 0;
BOOL found = False;
pstring dfspath, servername, sharename;
pstring altpath;
get_current_user(&user,p);
if (user.ut.uid != 0) {
DEBUG(10,("_dfs_remove: uid != 0. Access denied.\n"));
return WERR_ACCESS_DENIED;
}
unistr2_to_ascii(dfspath, &q_u->path, sizeof(dfspath)-1);
if(q_u->ptr0_server) {
unistr2_to_ascii(servername, &q_u->server, sizeof(servername)-1);
}
if(q_u->ptr0_share) {
unistr2_to_ascii(sharename, &q_u->share, sizeof(sharename)-1);
}
if(q_u->ptr0_server && q_u->ptr0_share) {
pstrcpy(altpath, servername);
pstrcat(altpath, "\\");
pstrcat(altpath, sharename);
strlower_m(altpath);
}
DEBUG(5,("init_reply_dfs_remove: Request to remove %s -> %s\\%s.\n",
dfspath, servername, sharename));
if(!NT_STATUS_IS_OK(get_referred_path(p->mem_ctx, dfspath, &jn, &consumedcnt, &self_ref))) {
return WERR_DFS_NO_SUCH_VOL;
}
/* if no server-share pair given, remove the msdfs link completely */
if(!q_u->ptr0_server && !q_u->ptr0_share) {
if(!remove_msdfs_link(&jn)) {
vfs_ChDir(p->conn,p->conn->connectpath);
return WERR_DFS_NO_SUCH_VOL;
}
vfs_ChDir(p->conn,p->conn->connectpath);
} else {
int i=0;
/* compare each referral in the list with the one to remove */
DEBUG(10,("altpath: .%s. refcnt: %d\n", altpath, jn.referral_count));
for(i=0;i<jn.referral_count;i++) {
pstring refpath;
pstrcpy(refpath,jn.referral_list[i].alternate_path);
trim_char(refpath, '\\', '\\');
DEBUG(10,("_dfs_remove: refpath: .%s.\n", refpath));
if(strequal(refpath, altpath)) {
*(jn.referral_list[i].alternate_path)='\0';
DEBUG(10,("_dfs_remove: Removal request matches referral %s\n",
refpath));
found = True;
}
}
if(!found) {
return WERR_DFS_NO_SUCH_SHARE;
}
/* Only one referral, remove it */
if(jn.referral_count == 1) {
if(!remove_msdfs_link(&jn)) {
vfs_ChDir(p->conn,p->conn->connectpath);
return WERR_DFS_NO_SUCH_VOL;
}
} else {
if(!create_msdfs_link(&jn, True)) {
vfs_ChDir(p->conn,p->conn->connectpath);
return WERR_DFS_CANT_CREATE_JUNCT;
}
}
vfs_ChDir(p->conn,p->conn->connectpath);
}
return WERR_OK;
}
WERROR _dfs_add(pipes_struct *p, DFS_Q_DFS_ADD* q_u, DFS_R_DFS_ADD *r_u)
{
struct current_user user;
struct junction_map jn;
struct referral* old_referral_list = NULL;
BOOL exists = False;
pstring dfspath, servername, sharename;
pstring altpath;
get_current_user(&user,p);
if (user.uid != 0) {
DEBUG(10,("_dfs_add: uid != 0. Access denied.\n"));
return WERR_ACCESS_DENIED;
}
unistr2_to_dos(dfspath, &q_u->DfsEntryPath, sizeof(dfspath)-1);
unistr2_to_dos(servername, &q_u->ServerName, sizeof(servername)-1);
unistr2_to_dos(sharename, &q_u->ShareName, sizeof(sharename)-1);
DEBUG(5,("init_reply_dfs_add: Request to add %s -> %s\\%s.\n",
dfspath, servername, sharename));
pstrcpy(altpath, servername);
pstrcat(altpath, "\\");
pstrcat(altpath, sharename);
if(get_referred_path(dfspath, &jn, NULL, NULL))
{
exists = True;
jn.referral_count += 1;
old_referral_list = jn.referral_list;
}
else
jn.referral_count = 1;
jn.referral_list = (struct referral*) talloc(p->mem_ctx, jn.referral_count
* sizeof(struct referral));
if(jn.referral_list == NULL)
{
DEBUG(0,("init_reply_dfs_add: talloc failed for referral list!\n"));
return WERR_DFS_INTERNAL_ERROR;
}
if(old_referral_list)
{
memcpy(jn.referral_list, old_referral_list,
sizeof(struct referral)*jn.referral_count-1);
SAFE_FREE(old_referral_list);
}
jn.referral_list[jn.referral_count-1].proximity = 0;
jn.referral_list[jn.referral_count-1].ttl = REFERRAL_TTL;
pstrcpy(jn.referral_list[jn.referral_count-1].alternate_path, altpath);
if(!create_msdfs_link(&jn, exists))
return WERR_DFS_CANT_CREATE_JUNCT;
return WERR_OK;
}
WERROR _dfs_remove(pipes_struct *p, DFS_Q_DFS_REMOVE *q_u,
DFS_R_DFS_REMOVE *r_u)
{
struct current_user user;
struct junction_map jn;
BOOL found = False;
pstring dfspath, servername, sharename;
pstring altpath;
get_current_user(&user,p);
if (user.uid != 0) {
DEBUG(10,("_dfs_remove: uid != 0. Access denied.\n"));
return WERR_ACCESS_DENIED;
}
unistr2_to_dos(dfspath, &q_u->DfsEntryPath, sizeof(dfspath)-1);
if(q_u->ptr_ServerName)
unistr2_to_dos(servername, &q_u->ServerName, sizeof(servername)-1);
if(q_u->ptr_ShareName)
unistr2_to_dos(sharename, &q_u->ShareName, sizeof(sharename)-1);
if(q_u->ptr_ServerName && q_u->ptr_ShareName)
{
pstrcpy(altpath, servername);
pstrcat(altpath, "\\");
pstrcat(altpath, sharename);
strlower(altpath);
}
DEBUG(5,("init_reply_dfs_remove: Request to remove %s -> %s\\%s.\n",
dfspath, servername, sharename));
if(!get_referred_path(dfspath, &jn, NULL, NULL))
return WERR_DFS_NO_SUCH_VOL;
/* if no server-share pair given, remove the msdfs link completely */
if(!q_u->ptr_ServerName && !q_u->ptr_ShareName)
{
if(!remove_msdfs_link(&jn))
return WERR_DFS_NO_SUCH_VOL;
}
else
{
int i=0;
/* compare each referral in the list with the one to remove */
DEBUG(10,("altpath: .%s. refcnt: %d\n", altpath, jn.referral_count));
for(i=0;i<jn.referral_count;i++)
{
pstring refpath;
pstrcpy(refpath,jn.referral_list[i].alternate_path);
trim_string(refpath, "\\", "\\");
DEBUG(10,("_dfs_remove: refpath: .%s.\n", refpath));
if(strequal(refpath, altpath))
{
*(jn.referral_list[i].alternate_path)='\0';
DEBUG(10,("_dfs_remove: Removal request matches referral %s\n",
refpath));
found = True;
}
}
if(!found)
return WERR_DFS_NO_SUCH_SHARE;
/* Only one referral, remove it */
if(jn.referral_count == 1)
{
if(!remove_msdfs_link(&jn))
return WERR_DFS_NO_SUCH_VOL;
}
else
{
if(!create_msdfs_link(&jn, True))
return WERR_DFS_CANT_CREATE_JUNCT;
}
}
return WERR_OK;
}
unsigned long **sys_call_table;
asmlinkage long (*ref_sys_cs3013_syscall1)(void);
asmlinkage int (*ref_sys_open)(const char* __user, int, int);
asmlinkage int (*ref_sys_close)(unsigned int);
asmlinkage long new_sys_cs3013_syscall1(void) {
printk(KERN_INFO "\"'Hello world?!' More like 'Goodbye, world!' EXTERMINATE!\" -- Dalek");
return 0;
} // asmlinkage long new_sys_cs3013_syscall1(void)
asmlinkage int new_sys_open(const char* __user file_name, int flags, int mode) {
user = get_current_user() -> uid;
if (user > 0){
//do modified call, this is user
//print statement
printk(KERN_INFO "\"'User %d is opening file: %s\"",user, file_name);
//exceute procedure
return filed = ref_sys_open(file_name, flags, mode);
}
else{
//do regular call, this is kernel
return ref_sys_open(file_name, flags, mode);
}