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fsm.c
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/* -*-c-*- */
/* Copyright (C) 2003 Olivier Chapuis
* some code taken from the xsm: Copyright 1993, 1998 The Open Group */
/* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see: <http://www.gnu.org/licenses/>
*/
/* A set of functions for implementing a dummy sm. The code is based on xsm */
/* ---------------------------- included header files ---------------------- */
#include "config.h"
#include <stdio.h>
#include <fcntl.h>
#ifdef HAVE_GETPWUID
#include <pwd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xproto.h>
#include <X11/Xatom.h>
#include "fvwmlib.h"
#include "System.h"
#include "flist.h"
#include "fsm.h"
/* #define FVWM_DEBUG_FSM */
/* ---------------------------- local definitions -------------------------- */
/* ---------------------------- local macros ------------------------------- */
/* ---------------------------- imports ------------------------------------ */
/* ---------------------------- included code files ------------------------ */
/* ---------------------------- local types -------------------------------- */
typedef struct
{
FIceConn ice_conn;
int fd;
} fsm_ice_conn_t;
/* ---------------------------- forward declarations ----------------------- */
/* ---------------------------- local variables ---------------------------- */
static FIceAuthDataEntry *sauthDataEntries = NULL;
static FIceIOErrorHandler prev_handler;
static FIceListenObj *slistenObjs;
static char *addAuthFile = NULL;
static char *remAuthFile = NULL;
static flist *fsm_ice_conn_list = NULL;
static flist *pending_ice_conn_list = NULL;
static int numTransports = 0;
static char *networkIds = NULL;
static int *ice_fd = NULL;
static char *module_name = NULL;
static flist *running_list = NULL;
static Bool fsm_init_succeed = False;
static Atom _XA_WM_CLIENT_LEADER = None;
static Atom _XA_SM_CLIENT_ID = None;
/* ---------------------------- exported variables (globals) --------------- */
/* ---------------------------- local functions ---------------------------- */
/*
* client list stuff
*/
static
void free_fsm_client(fsm_client_t *client)
{
if (!SessionSupport)
{
return;
}
if (client->clientId)
{
free(client->clientId);
}
free(client);
}
/*
* auth stuff
*/
static void
fprintfhex(register FILE *fp, unsigned int len, char *cp)
{
static const char hexchars[] = "0123456789abcdef";
for (; len > 0; len--, cp++) {
unsigned char s = *cp;
putc(hexchars[s >> 4], fp);
putc(hexchars[s & 0x0f], fp);
}
}
/*
* Host Based Authentication Callback. This callback is invoked if
* the connecting client can't offer any authentication methods that
* we can accept. We can accept/reject based on the hostname.
*/
static
Bool HostBasedAuthProc(char *hostname)
{
return (0); /* For now, we don't support host based authentication */
}
/*
* We use temporary files which contain commands to add/remove entries from
* the .ICEauthority file.
*/
static void
write_iceauth(FILE *addfp, FILE *removefp, FIceAuthDataEntry *entry)
{
if (!SessionSupport)
{
return;
}
fprintf(addfp,
"add %s \"\" %s %s ", entry->protocol_name, entry->network_id,
entry->auth_name);
fprintfhex(addfp, entry->auth_data_length, entry->auth_data);
fprintf(addfp, "\n");
fprintf(
removefp,
"remove protoname=%s protodata=\"\" netid=%s authname=%s\n",
entry->protocol_name, entry->network_id, entry->auth_name);
}
static char *
unique_filename(char *path, char *prefix, int *pFd)
{
char *tempFile;
xasprintf(&tempFile, "%s/%sXXXXXX", path, prefix);
*pFd = fvwm_mkstemp(tempFile);
if (*pFd == -1)
{
free(tempFile);
tempFile = NULL;
}
return tempFile;
}
/*
* Provide authentication data to clients that wish to connect
*/
#define MAGIC_COOKIE_LEN 16
static
Status SetAuthentication(
int count,FIceListenObj *listenObjs,FIceAuthDataEntry **authDataEntries)
{
FILE *addfp = NULL;
FILE *removefp = NULL;
char *path;
int original_umask;
char command[256];
int i;
int fd;
if (!SessionSupport)
{
return 0;
}
original_umask = umask (0077); /* disallow non-owner access */
path = (char *)getenv("SM_SAVE_DIR");
if (!path)
{
path = getenv("HOME");
}
#ifdef HAVE_GETPWUID
if (!path)
{
struct passwd *pwd;
pwd = getpwuid(getuid());
if (pwd)
{
path = pwd->pw_dir;
}
}
#endif
if (!path)
{
path = ".";
}
if ((addAuthFile = unique_filename (path, ".fsm-", &fd)) == NULL)
{
goto bad;
}
if (!(addfp = fdopen(fd, "wb")))
{
goto bad;
}
if ((remAuthFile = unique_filename (path, ".fsm-", &fd)) == NULL)
{
goto bad;
}
if (!(removefp = fdopen(fd, "wb")))
{
goto bad;
}
*authDataEntries = fxmalloc(count * 2 * sizeof (FIceAuthDataEntry));
for (i = 0; i < count * 2; i += 2)
{
(*authDataEntries)[i].network_id =
FIceGetListenConnectionString(listenObjs[i/2]);
(*authDataEntries)[i].protocol_name = "ICE";
(*authDataEntries)[i].auth_name = "MIT-MAGIC-COOKIE-1";
(*authDataEntries)[i].auth_data =
FIceGenerateMagicCookie (MAGIC_COOKIE_LEN);
(*authDataEntries)[i].auth_data_length = MAGIC_COOKIE_LEN;
(*authDataEntries)[i+1].network_id =
FIceGetListenConnectionString(listenObjs[i/2]);
(*authDataEntries)[i+1].protocol_name = "XSMP";
(*authDataEntries)[i+1].auth_name = "MIT-MAGIC-COOKIE-1";
(*authDataEntries)[i+1].auth_data =
FIceGenerateMagicCookie (MAGIC_COOKIE_LEN);
(*authDataEntries)[i+1].auth_data_length = MAGIC_COOKIE_LEN;
write_iceauth(addfp, removefp, &(*authDataEntries)[i]);
write_iceauth(addfp, removefp, &(*authDataEntries)[i+1]);
FIceSetPaAuthData(2, &(*authDataEntries)[i]);
FIceSetHostBasedAuthProc(listenObjs[i/2], HostBasedAuthProc);
}
fclose(addfp);
fclose(removefp);
umask (original_umask);
snprintf (command, sizeof(command), "iceauth source %s", addAuthFile);
{
int n;
n = system(command);
(void)n;
}
unlink (addAuthFile);
return 1;
bad:
if (addfp)
{
fclose (addfp);
}
if (removefp)
{
fclose (removefp);
}
if (addAuthFile)
{
unlink (addAuthFile);
free (addAuthFile);
}
if (remAuthFile)
{
unlink (remAuthFile);
free (remAuthFile);
}
return 0;
}
static
void FreeAuthenticationData(int count, FIceAuthDataEntry *authDataEntries)
{
/* Each transport has entries for ICE and XSMP */
char command[256];
int i;
if (!SessionSupport)
{
return;
}
for (i = 0; i < count * 2; i++)
{
free(authDataEntries[i].network_id);
free(authDataEntries[i].auth_data);
}
free ((char *) authDataEntries);
snprintf (command, sizeof(command), "iceauth source %s", remAuthFile);
{
int n;
n = system(command);
(void)n;
}
unlink (remAuthFile);
free (addAuthFile);
free (remAuthFile);
}
/*
* ice stuff
*/
static
void MyIoErrorHandler(FIceConn ice_conn)
{
if (!SessionSupport)
{
return;
}
if (prev_handler)
{
(*prev_handler) (ice_conn);
}
}
static
void InstallIOErrorHandler(void)
{
FIceIOErrorHandler default_handler;
if (!SessionSupport)
{
return;
}
prev_handler = FIceSetIOErrorHandler(NULL);
default_handler = FIceSetIOErrorHandler(MyIoErrorHandler);
if (prev_handler == default_handler)
{
prev_handler = NULL;
}
}
static void
CloseListeners(void)
{
if (!SessionSupport)
{
return;
}
FIceFreeListenObjs(numTransports, slistenObjs);
}
static
void ice_watch_fd(
FIceConn conn, FIcePointer client_data, Bool opening,
FIcePointer *watch_data)
{
fsm_ice_conn_t *fice_conn;
if (!SessionSupport)
{
return;
}
if (opening)
{
fice_conn = fxmalloc(sizeof(fsm_ice_conn_t));
fice_conn->ice_conn = conn;
fice_conn->fd = FIceConnectionNumber(conn);
*watch_data = (FIcePointer) fice_conn;
fsm_ice_conn_list =
flist_append_obj(fsm_ice_conn_list, fice_conn);
fcntl(fice_conn->fd, F_SETFD, FD_CLOEXEC);
}
else
{
fice_conn = (fsm_ice_conn_t *)*watch_data;
fsm_ice_conn_list =
flist_remove_obj(fsm_ice_conn_list, fice_conn);
free(fice_conn);
}
}
/*
* Session Manager callbacks
*/
static
Status RegisterClientProc(
FSmsConn smsConn, FSmPointer managerData, char *previousId)
{
fsm_client_t *client = (fsm_client_t *) managerData;
char *id;
int send_save = 0;
if (!SessionSupport)
{
return 0;
}
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__,
"[%s][RegisterClientProc] On FIceConn fd = %d, received "
"REGISTER CLIENT [Previous Id = %s]\n", module_name,
FIceConnectionNumber (client->ice_conn),
previousId ? previousId : "NULL");
#endif
/* ignore previousID!! (we are dummy) */
id = FSmsGenerateClientID(smsConn);
if (!FSmsRegisterClientReply(smsConn, id))
{
/* cannot happen ? */
if (id)
{
free(id);
}
fvwm_debug(__func__,
"[%s][RegisterClientProc] ERR -- fail to register "
"client", module_name);
return 0;
}
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__,
"[%s][RegisterClientProc] On FIceConn fd = %d, sent "
"REGISTER CLIENT REPLY [Client Id = %s]\n",
module_name, FIceConnectionNumber (client->ice_conn), id);
#endif
client->clientId = id;
/* client->clientHostname = FSmsClientHostName (smsConn); */
/* we are dummy ... do not do that */
if (send_save)
{
FSmsSaveYourself(
smsConn, FSmSaveLocal, False, FSmInteractStyleNone,
False);
}
return 1;
}
static void
InteractRequestProc(FSmsConn smsConn, FSmPointer managerData, int dialogType)
{
if (!SessionSupport)
{
return;
}
/* no intercation! */
#if 0
FSmsInteract (client->smsConn);
#endif
}
static void
InteractDoneProc(FSmsConn smsConn, FSmPointer managerData, Bool cancelShutdown)
{
/* no intercation! */
}
static void
SaveYourselfReqProc(FSmsConn smsConn, FSmPointer managerData, int saveType,
Bool shutdown, int interactStyle, Bool fast, Bool global)
{
/* no session to save */
}
static
void SaveYourselfPhase2ReqProc(FSmsConn smsConn, FSmPointer managerData)
{
fsm_client_t *client;
if (!SessionSupport)
{
return;
}
client = (fsm_client_t *)managerData;
SUPPRESS_UNUSED_VAR_WARNING(client);
FSmsSaveYourselfPhase2(client->smsConn);
}
static void
SaveYourselfDoneProc(FSmsConn smsConn, FSmPointer managerData, Bool success)
{
fsm_client_t *client;
if (!SessionSupport)
{
return;
}
client = (fsm_client_t *) managerData;
SUPPRESS_UNUSED_VAR_WARNING(client);
FSmsSaveComplete(client->smsConn);
}
static void
CloseDownClient(fsm_client_t *client)
{
if (!SessionSupport)
{
return;
}
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__, "[%s][CloseDownClient] ICE Connection closed, "
"FIceConn fd = %d\n", module_name,
FIceConnectionNumber (client->ice_conn));
#endif
FSmsCleanUp(client->smsConn);
FIceSetShutdownNegotiation(client->ice_conn, False);
if ((!FIceCloseConnection(client->ice_conn)) != FIceClosedNow)
{
/* do not care */
}
client->ice_conn = NULL;
client->smsConn = NULL;
running_list = flist_remove_obj(running_list, client);
free_fsm_client(client);
}
static void
CloseConnectionProc(FSmsConn smsConn, FSmPointer managerData,
int count, char **reasonMsgs)
{
fsm_client_t *client = (fsm_client_t *) managerData;
if (!SessionSupport)
{
return;
}
FSmFreeReasons(count, reasonMsgs);
CloseDownClient(client);
}
static
void SetPropertiesProc(
FSmsConn smsConn, FSmPointer managerData, int numProps, FSmProp **props)
{
int i;
if (!SessionSupport)
{
return;
}
for (i = 0; i < numProps; i++)
{
FSmFreeProperty(props[i]);
}
free ((char *) props);
}
static
void DeletePropertiesProc(
FSmsConn smsConn, FSmPointer managerData, int numProps, char **propNames)
{
int i;
if (!SessionSupport)
{
return;
}
for (i = 0; i < numProps; i++)
{
free (propNames[i]);
}
free ((char *) propNames);
}
static
void GetPropertiesProc(FSmsConn smsConn, FSmPointer managerData)
{
}
static Status
NewClientProc(
FSmsConn smsConn, FSmPointer managerData, unsigned long *maskRet,
FSmsCallbacks *callbacksRet, char **failureReasonRet)
{
fsm_client_t *nc;
if (!SessionSupport)
{
return 0;
}
nc = fxmalloc(sizeof (fsm_client_t));
*maskRet = 0;
nc->smsConn = smsConn;
nc->ice_conn = FSmsGetIceConnection(smsConn);
nc->clientId = NULL;
running_list = flist_append_obj(running_list, nc);
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__,
"[%s][NewClientProc] On FIceConn fd = %d, client "
"set up session mngmt protocol\n", module_name,
FIceConnectionNumber (nc->ice_conn));
#endif
/*
* Set up session manager callbacks.
*/
*maskRet |= FSmsRegisterClientProcMask;
callbacksRet->register_client.callback = RegisterClientProc;
callbacksRet->register_client.manager_data = (FSmPointer) nc;
*maskRet |= FSmsInteractRequestProcMask;
callbacksRet->interact_request.callback = InteractRequestProc;
callbacksRet->interact_request.manager_data = (FSmPointer) nc;
*maskRet |= FSmsInteractDoneProcMask;
callbacksRet->interact_done.callback = InteractDoneProc;
callbacksRet->interact_done.manager_data = (FSmPointer) nc;
*maskRet |= FSmsSaveYourselfRequestProcMask;
callbacksRet->save_yourself_request.callback = SaveYourselfReqProc;
callbacksRet->save_yourself_request.manager_data = (FSmPointer) nc;
*maskRet |= FSmsSaveYourselfP2RequestProcMask;
callbacksRet->save_yourself_phase2_request.callback =
SaveYourselfPhase2ReqProc;
callbacksRet->save_yourself_phase2_request.manager_data =
(FSmPointer) nc;
*maskRet |= FSmsSaveYourselfDoneProcMask;
callbacksRet->save_yourself_done.callback = SaveYourselfDoneProc;
callbacksRet->save_yourself_done.manager_data = (FSmPointer) nc;
*maskRet |= FSmsCloseConnectionProcMask;
callbacksRet->close_connection.callback = CloseConnectionProc;
callbacksRet->close_connection.manager_data = (FSmPointer) nc;
*maskRet |= FSmsSetPropertiesProcMask;
callbacksRet->set_properties.callback = SetPropertiesProc;
callbacksRet->set_properties.manager_data = (FSmPointer) nc;
*maskRet |= FSmsDeletePropertiesProcMask;
callbacksRet->delete_properties.callback = DeletePropertiesProc;
callbacksRet->delete_properties.manager_data = (FSmPointer) nc;
*maskRet |= FSmsGetPropertiesProcMask;
callbacksRet->get_properties.callback = GetPropertiesProc;
callbacksRet->get_properties.manager_data = (FSmPointer) nc;
return 1;
}
/*
*
*/
static
void CompletNewConnectionMsg(void)
{
flist *l = pending_ice_conn_list;
FIceConn ice_conn;
FIceAcceptStatus cstatus;
if (!SessionSupport)
{
return;
}
while(l != NULL)
{
ice_conn = (FIceConn)l->object;
cstatus = (FIceAcceptStatus)FIceConnectionStatus(ice_conn);
if (cstatus == (int)FIceConnectPending)
{
l = l->next;
}
else if (cstatus == (int)FIceConnectAccepted)
{
l = l->next;
pending_ice_conn_list =
flist_remove_obj(
pending_ice_conn_list,
ice_conn);
#ifdef FVWM_DEBUG_FSM
char *connstr;
connstr = FIceConnectionString (ice_conn);
fvwm_debug(__func__,
"[%s][NewConnection] ICE Connection "
"opened by client, FIceConn fd = %d, Accept at "
"networkId %s\n", module_name,
FIceConnectionNumber (ice_conn), connstr);
free (connstr);
#endif
}
else
{
if (FIceCloseConnection (ice_conn) != FIceClosedNow)
{
/* don't care */
}
pending_ice_conn_list =
flist_remove_obj(
pending_ice_conn_list,
ice_conn);
#ifdef FVWM_DEBUG_FSM
if (cstatus == FIceConnectIOError)
{
fvwm_debug(__func__,
"[%s][NewConnection] IO error "
"opening ICE Connection!\n",
module_name);
}
else
{
fvwm_debug(__func__,
"[%s][NewConnection] ICE "
"Connection rejected!\n",
module_name);
}
#endif
}
}
}
static
void NewConnectionMsg(int i)
{
FIceConn ice_conn;
FIceAcceptStatus status;
if (!SessionSupport)
{
return;
}
SUPPRESS_UNUSED_VAR_WARNING(status);
ice_conn = FIceAcceptConnection(slistenObjs[i], &status);
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__, "[%s][NewConnection] %i\n", module_name, i);
#endif
if (!ice_conn)
{
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__, "[%s][NewConnection] "
"FIceAcceptConnection failed\n", module_name);
#endif
}
else
{
pending_ice_conn_list =
flist_append_obj(pending_ice_conn_list, ice_conn);
CompletNewConnectionMsg();
}
}
static
void ProcessIceMsg(fsm_ice_conn_t *fic)
{
FIceProcessMessagesStatus status;
if (!SessionSupport)
{
return;
}
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__, "[%s][ProcessIceMsg] %i\n", module_name,
(int)fic->fd);
#endif
status = FIceProcessMessages(fic->ice_conn, NULL, NULL);
if (status == FIceProcessMessagesIOError)
{
flist *cl;
int found = 0;
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__,
"[%s][ProcessIceMsg] IO error on connection\n",
module_name);
#endif
for (cl = running_list; cl; cl = cl->next)
{
fsm_client_t *client = (fsm_client_t *) cl->object;
if (client->ice_conn == fic->ice_conn)
{
CloseDownClient (client);
found = 1;
break;
}
}
if (!found)
{
/*
* The client must have disconnected before it was added
* to the session manager's running list (i.e. before the
* NewClientProc callback was invoked).
*/
FIceSetShutdownNegotiation (fic->ice_conn, False);
if ((!FIceCloseConnection(fic->ice_conn)) != FIceClosedNow)
{
/* do not care */
}
}
}
}
/*
* proxy stuff
*/
static
char *GetClientID(Display *dpy, Window window)
{
char *client_id = NULL;
Window client_leader = None;
XTextProperty tp;
Atom actual_type;
int actual_format;
unsigned long nitems;
unsigned long bytes_after;
unsigned char *prop = NULL;
if (!SessionSupport)
{
return NULL;
}
if (!_XA_WM_CLIENT_LEADER)
{
_XA_WM_CLIENT_LEADER = XInternAtom(
dpy, "WM_CLIENT_LEADER", False);
}
if (!_XA_SM_CLIENT_ID)
{
_XA_SM_CLIENT_ID = XInternAtom(dpy, "SM_CLIENT_ID", False);
}
if (XGetWindowProperty(
dpy, window, _XA_WM_CLIENT_LEADER, 0L, 1L, False,
AnyPropertyType, &actual_type, &actual_format, &nitems,
&bytes_after, &prop) == Success)
{
if (actual_type == XA_WINDOW && actual_format == 32 &&
nitems == 1 && bytes_after == 0)
{
client_leader = (Window)(*(long *)prop);
}
}
if (!client_leader)
{
client_leader = window;
}
if (client_leader)
{
if (XGetTextProperty(dpy, client_leader, &tp, _XA_SM_CLIENT_ID))
{
if (tp.encoding == XA_STRING && tp.format == 8 &&
tp.nitems != 0)
{
client_id = (char *) tp.value;
}
}
}
if (prop)
{
XFree (prop);
}
return client_id;
}
static
void set_session_manager(Display *dpy, Window window, char *sm)
{
Window client_leader = None;
Atom actual_type;
int actual_format;
unsigned long nitems;
unsigned long bytes_after;
unsigned char *prop = NULL;
char *dummy_id;
static Atom _XA_SESSION_MANAGER = None;
if (!SessionSupport)
{
return;
}
dummy_id = "0";
if (!_XA_SESSION_MANAGER)
{
_XA_SESSION_MANAGER = XInternAtom (
dpy, "SESSION_MANAGER", False);
}
if (!_XA_WM_CLIENT_LEADER)
{
_XA_WM_CLIENT_LEADER = XInternAtom(
dpy, "WM_CLIENT_LEADER", False);
}
if (!_XA_SM_CLIENT_ID)
{
_XA_SM_CLIENT_ID = XInternAtom(dpy, "SM_CLIENT_ID", False);
}
if (XGetWindowProperty(
dpy, window, _XA_WM_CLIENT_LEADER, 0L, 1L, False,
AnyPropertyType, &actual_type, &actual_format, &nitems,
&bytes_after, &prop) == Success)
{
if (actual_type == XA_WINDOW && actual_format == 32 &&
nitems == 1 && bytes_after == 0)
{
client_leader = (Window)(*(long *)prop);
}
}
if (!client_leader)
{
client_leader = window;
}
#ifdef FVWM_DEBUG_FSM
fvwm_debug(__func__, "[%s][fsm_init] Proxy %s window 0x%lx\n",
module_name, (sm)? "On":"Off", client_leader);
#endif
/* set the client id for ksmserver */
if (sm)
{
XChangeProperty(
dpy, client_leader, _XA_SESSION_MANAGER, XA_STRING,
8, PropModeReplace, (unsigned char *)sm, strlen(sm));
XChangeProperty(
dpy, client_leader, _XA_SM_CLIENT_ID, XA_STRING,
8, PropModeReplace, (unsigned char *)dummy_id,
strlen(dummy_id));
}
else
{
XDeleteProperty(dpy, client_leader, _XA_SESSION_MANAGER);
XDeleteProperty(dpy, client_leader, _XA_SM_CLIENT_ID);
}
}