/***************************************************************************/
/***************************************************************************/
/* */
/* (c) 1995-1999. The Regents of the University of California. All */
/* rights reserved. */
/* */
/* This work was produced at the University of California, Lawrence */
/* Livermore National Laboratory (UC LLNL) under contract no. */
/* W-7405-ENG-48 (Contract 48) between the U.S. Department of Energy */
/* (DOE) and The Regents of the University of California (University) */
/* for the operation of UC LLNL. Copyright is reserved to the */
/* University for purposes of controlled dissemination, */
/* commercialization through formal licensing, or other disposition */
/* under terms of Contract 48; DOE policies, regulations and orders; */
/* and U.S. statutes. The rights of the Federal Government are */
/* reserved under Contract 48 subject to the restrictions agreed upon */
/* by the DOE and University. */
/* */
/* */
/* DISCLAIMER */
/* */
/* This software was prepared as an account of work sponsored by an */
/* agency of the United States Government. Neither the United States */
/* Government nor the University of California nor any of their */
/* employees, makes any warranty, express or implied, or assumes any */
/* liability or responsibility for the accuracy, completeness, or */
/* usefulness of any information, apparatus, product, or process */
/* disclosed, or represents that its specific commercial products, */
/* process, or service by trade name, trademark, manufacturer, or */
/* otherwise, does not necessarily constitute or imply its */
/* endorsement, recommendation, or favoring by the United States */
/* Government or the University of California. The views and opinions */
/* of the authors expressed herein do not necessarily state or reflect */
/* those of the United States Government or the University of */
/* California, and shall not be used for advertising or product */
/* endorsement purposes. */
/* */
/* Permission to use, copy, modify and distribute this software and its */
/* documentation for any non-commercial purpose, without fee, is */
/* hereby granted, provided that the above copyright notice and this */
/* permission notice appear in all copies of the software and */
/* supporting documentation, and that all UC LLNL identification in */
/* the user interface remain unchanged. The title to copyright LLNL */
/* XDIR shall at all times remain with The Regents of the University */
/* of California and users agree to preserve same. Users seeking the */
/* right to make derivative works with LLNL XDIR for commercial */
/* purposes may obtain a license from the Lawrence Livermore National */
/* Laboratory's Technology Transfer Office, P.O. Box 808, L-795, */
/* Livermore, CA 94550. */
/* */
/***************************************************************************/
/***************************************************************************/
#include <sys/time.h>
#include <Xm/Xm.h>
#include "xdir.h"
static Widget w_reconnect_dialog;
static char *msg1 = "Lost connection to %s.";
static char *msg2 = "Lost connection to %s.\n\nWas able to reconnect.\n\nYou might have to reissue your last command\nor refresh one or more directory windows.";
static char *msg3 = "Lost connection to %s.\n\nWas not able to reconnect.\n\nWill close all directory windows for this host.";
static char *msg4 = "Lost connection to %s.\n\nWas not able to reconnect.\n\nWill close all directory windows for this host\nand open a directory window for the local host.";
static char *msg5 = "Lost connection to %s.\n\nUser aborted reconnection attempt.\n\nWill close all directory windows for this host.";
static char *msg6 = "Lost connection to %s.\n\nUser aborted reconnection attempt.\n\nWill close all directory windows for this host\nand open a directory window for the local host.";
Widget show_in_progress_dialog();
extern struct st_host_info hinfo[];
extern struct dirwin_st *dirwin_head;
extern int connection_check_time;
void clean_up_lost_connection();
/*
* check_connection - Make sure that connection is up. If less than the
* time specified by the user preference "Connection
* Check Time" has passed since last hearing from the
* remote host, then it is assumed that the connection
* is up. If more than "Connection Check Time" has
* passed then a NOOP is sent to see if the connection
* is up; if not an attempt is made to restore the
* connection. Returns 0 if connection is good, -3
* for unable to restore lost connection, -6 for stop
* button pushed, and -1 for other errors.
*/
check_connection(host, dirwin)
int host;
struct dirwin_st *dirwin;
{
struct timeval current_time;
int retval;
/* If we've heard from remote host recently, assume connection is good */
gettimeofday(¤t_time, NULL);
if (hinfo[host].last_reply_time+connection_check_time*60 >
current_time.tv_sec)
return 0;
/* It's been awhile since last reply. Send noop to remote host. */
retval = remote_noop(host);
switch (retval) {
case -3: /* Lost connection. Try to reconnect */
case -2: /* No response. Assume lost connection. */
switch (try_to_reconnect(host, dirwin)) {
case 0:
return 0;
case -6:
clean_up_lost_connection(host, dirwin, True);
return -3;
default:
clean_up_lost_connection(host, dirwin, False);
return -3;
}
default:
return retval;
}
}
/*
* restore_lost_connection - This routine is called when a lost control
* connection to "host" is detected. The user
* is informed, and a reconnection is attempted.
* Auxiliary dialogs are centered over directory
* window "dirwin". If unable to reconnect, all
* directory windows associated with host are
* closed, and -1 is returned. If able to
* reconnect, 0 is returned.
*/
restore_lost_connection(host, dirwin)
int host;
struct dirwin_st *dirwin;
{
char *msg;
int retval;
/* Report broken connection */
msg = XtMalloc(strlen(msg1)+strlen(hinfo[host].hostname)+10);
sprintf(msg, msg1, hinfo[host].hostname);
record_warning(msg);
XtFree(msg);
/* Try to reconnect */
retval = try_to_reconnect(host, dirwin);
/* If able to reconnect, let user know */
if (retval == 0) {
msg = XtMalloc(strlen(msg2)+strlen( hinfo[host].hostname)+1);
sprintf(msg, msg2, hinfo[host].hostname);
warn(msg, dirwin->w_shell);
XtFree(msg);
return 0;
}
/* Report failure to reconnect */
clean_up_lost_connection(host, dirwin, (retval == -6));
return -1;
}
/*
* show_reconnect_dialog - Pop up a dialog that displays an "attempting to
* reconnect message over directory window "dirwin".
*/
void
show_reconnect_dialog(dirwin)
struct dirwin_st *dirwin;
{
w_reconnect_dialog = show_in_progress_dialog(dirwin,
"Reconnect to Remote Host",
"LOST CONNECTION TO REMOTE HOST\n\n------------\n\nATTEMPTING TO RECONNECT");
}
/*
* hide_reconnect_dialog - Pop down dialog that displays an "attempting to
* reconnect message.
*/
void
hide_reconnect_dialog()
{
hide_in_progress_dialog(w_reconnect_dialog);
}
/*
* try_to_reconnect - Try to reestablish connection to remote host.
* Returns 0 if successful, -6 if stop button pressed,
* else -1.
*/
try_to_reconnect(host, dirwin)
int host;
struct dirwin_st *dirwin;
{
int retval;
show_reconnect_dialog(dirwin);
retval = do_connect(host, dirwin);
hide_reconnect_dialog();
return retval;
}
/*
* clean_up_lost_connection - Report failure to reconnect and close all
* directory windows for this host. Set
* "stop_button_pushed" to True if unable to
* reconnect because user pressed stop button.
*/
void
clean_up_lost_connection(host, dirwin, stop_button_pushed)
int host;
struct dirwin_st *dirwin;
int stop_button_pushed;
{
struct dirwin_st *dwin;
struct dirwin_st *next;
char *msg;
/* Report lost connection */
dwin = dirwin_head;
while (dwin && (dwin->host == dirwin->host))
dwin = dwin->next;
if (dwin) {
if (stop_button_pushed) {
record_abort("Reconnect to Remote Host");
msg = XtMalloc(strlen(msg5)+strlen(hinfo[host].hostname)+1);
sprintf(msg, msg5, hinfo[host].hostname);
} else {
msg = XtMalloc(strlen(msg3)+strlen(hinfo[host].hostname)+1);
sprintf(msg, msg3, hinfo[host].hostname);
}
warn(msg, dirwin->w_shell);
} else {
if (stop_button_pushed) {
record_abort("Reconnect to Remote Host");
msg = XtMalloc(strlen(msg6)+strlen(hinfo[host].hostname)+1);
sprintf(msg, msg6, hinfo[host].hostname);
} else {
msg = XtMalloc(strlen(msg4)+strlen(hinfo[host].hostname)+1);
sprintf(msg, msg4, hinfo[host].hostname);
}
warn(msg, dirwin->w_shell);
if (connect_to_local(NULL) < 0)
fatal_error("Unable to connect to local host.");
}
XtFree(msg);
/* Close all directory windows for host */
dwin = dirwin_head;
while (dwin) {
next = dwin->next;
if (dwin->host == host)
close_directory_window(dwin);
dwin = next;
}
}
syntax highlighted by Code2HTML, v. 0.9.1