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openvpn-gui/openvpn_monitor_process.c

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/*
* OpenVPN-GUI -- A Windows GUI for OpenVPN.
*
* Copyright (C) 2004 Mathias Sundman <mathias@nilings.se>
*
* 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 (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Parts of this sourcefile is taken from openvpnserv.c from the
* OpenVPN source, with approval from the author, James Yonan
* <jim@yonan.net>.
*/
#include <windows.h>
#include <stdio.h>
#include <time.h>
#include "main.h"
#include "options.h"
#include "openvpn.h"
#include "scripts.h"
#include "openvpn-gui-res.h"
#include "passphrase.h"
#include "tray.h"
extern struct options o;
/* Wait for a complete line (CR/LF) and return it.
* Return values:
* 1 - Successful. Line is available in *line.
* 0 - Broken Pipe during ReadFile.
* -1 - Other Error during ReadFile.
*
* I'm really unhappy with this code! If anyone knows of an easier
* way to convert the streaming data from ReadFile() into lines,
* please let me know!
*/
int ReadLineFromStdOut(HANDLE hStdOut, int config, char *line)
{
#define MAX_LINELEN 1024
CHAR lpBuffer[MAX_LINELEN];
static char lastline[MAX_CONFIGS][MAX_LINELEN];
static int charsleft[MAX_CONFIGS];
char tmpline[MAX_LINELEN];
DWORD nBytesRead;
DWORD nCharsWritten;
char *p;
unsigned int len, i;
static int first_call = 1;
extern HINSTANCE hInstance;
if (first_call)
{
for (i=0; i < MAX_CONFIGS; i++)
charsleft[i]=0;
first_call = 0;
}
while (true)
{
if (charsleft[config])
{
/* Check for Passphrase prompt */
CheckPrivateKeyPassphrasePrompt(lastline[config], config);
/* Check for Username/Password Auth prompt */
CheckAuthUsernamePrompt(lastline[config], config);
CheckAuthPasswordPrompt(lastline[config]);
p=strchr(lastline[config], '\n');
if (p == NULL)
{
if (!ReadFile(hStdOut,lpBuffer,sizeof(lpBuffer) - strlen(lastline[config]) - 1,
&nBytesRead,NULL) || !nBytesRead)
{
if (GetLastError() == ERROR_BROKEN_PIPE)
return(0); // pipe done - normal exit path.
else
{
/* error reading from pipe */
ShowLocalizedMsg(GUI_NAME, ERR_READ_STDOUT_PIPE, "");
return(-1);
}
}
lpBuffer[nBytesRead] = '\0';
p=strchr(lpBuffer, '\n');
if (p == NULL)
{
strncat(lastline[config], lpBuffer, sizeof(lastline[config]) - strlen(lastline[config]) - 1);
if (strlen(lastline[config]) >= (MAX_LINELEN - 1))
{
strncpy(line, lastline[config], MAX_LINELEN);
charsleft[config]=0;
return(1);
}
}
else
{
p[0] = '\0';
strncpy(line, lastline[config], MAX_LINELEN - 1);
strncat(line, lpBuffer, MAX_LINELEN - strlen(line));
if (line[strlen(line) - 1] == '\r') line[strlen(line) - 1] = '\0';
if (nBytesRead > (strlen(lpBuffer) + 1))
{
strncpy(lastline[config], p+1, sizeof(lastline[config]) - 1);
charsleft[config]=1;
return(1);
}
charsleft[config]=0;
return(1);
}
}
else
{
len = strlen(lastline[config]);
p[0] = '\0';
strncpy(line, lastline[config], MAX_LINELEN - 1);
if (line[strlen(line) - 1] == '\r') line[strlen(line) - 1] = '\0';
if (len > (strlen(line) + 2))
{
strncpy(tmpline, p+1, sizeof(tmpline) - 1);
strncpy(lastline[config], tmpline, sizeof(lastline[config]) - 1);
charsleft[config]=1;
return(1);
}
charsleft[config]=0;
return(1);
}
}
else
{
if (!ReadFile(hStdOut,lpBuffer,sizeof(lpBuffer) - 1,
&nBytesRead,NULL) || !nBytesRead)
{
if (GetLastError() == ERROR_BROKEN_PIPE)
return(0); // pipe done - normal exit path.
else
{
/* error reading from pipe */
ShowLocalizedMsg(GUI_NAME, ERR_READ_STDOUT_PIPE, "");
return(-1);
}
}
lpBuffer[nBytesRead] = '\0';
p=strchr(lpBuffer, '\n');
if (p == NULL)
{
if (nBytesRead >= (MAX_LINELEN - 1))
{
strncpy(line, lpBuffer, MAX_LINELEN);
charsleft[config]=0;
return(1);
}
else
{
strncpy(lastline[config], lpBuffer, sizeof(lastline[config]) - 1);
charsleft[config]=1;
}
}
else
{
p[0] = '\0';
strncpy(line, lpBuffer, MAX_LINELEN - 1);
if (line[strlen(line) - 1] == '\r') line[strlen(line) - 1] = '\0';
if (nBytesRead > strlen(line))
{
strncpy(lastline[config], p+1, sizeof(lastline[config]) - 1);
charsleft[config]=1;
return(1);
}
}
}
}
}
/*
* Monitor the openvpn log output while CONNECTING
*/
void monitor_openvpnlog_while_connecting(int config, char *line)
{
TCHAR buf[1000];
char msg[200];
char msg2[200];
unsigned int i;
char *linepos;
/* Check for Connected message */
if (strstr(line, o.connect_string) != NULL)
{
/* Run Connect Script */
RunConnectScript(config, false);
/* Save time when we got connected. */
o.cnn[config].connected_since = time(NULL);
o.cnn[config].connect_status = CONNECTED;
SetMenuStatus(config, CONNECTED);
SetTrayIcon(CONNECTED);
/* Remove Proxy Auth file */
DeleteFile(o.proxy_authfile);
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
/* UserInfo: Connected */
myLoadString(INFO_STATE_CONNECTED);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_CONNECTED);
/* Show Tray Balloon msg */
if (o.show_balloon[0] != '0')
{
myLoadString(INFO_NOW_CONNECTED);
mysnprintf(msg, buf, o.cnn[config].config_name);
if (strlen(o.cnn[config].ip) > 0)
{
myLoadString(INFO_ASSIG_IP);
mysnprintf(msg2, buf, o.cnn[config].ip);
}
else
{
mysnprintf(msg2," ");
}
ShowTrayBalloon(msg, msg2);
}
/* Hide Status Window */
ShowWindow(o.cnn[config].hwndStatus, SW_HIDE);
}
/* Check for failed passphrase log message */
if ((strstr(line, "TLS Error: Need PEM pass phrase for private key") != NULL) ||
(strstr(line, "EVP_DecryptFinal:bad decrypt") != NULL) ||
(strstr(line, "PKCS12_parse:mac verify failure") != NULL) ||
(strstr(line, "Received AUTH_FAILED control message") != NULL) ||
(strstr(line, "Auth username is empty") != NULL))
{
o.cnn[config].failed_psw_attempts++;
o.cnn[config].failed_psw=1;
o.cnn[config].restart=true;
}
/* Check for "certificate has expired" message */
if ((strstr(line, "error=certificate has expired") != NULL))
{
StopOpenVPN(config);
/* Cert expired... */
ShowLocalizedMsg(GUI_NAME, ERR_CERT_EXPIRED, "");
}
/* Check for "certificate is not yet valid" message */
if ((strstr(line, "error=certificate is not yet valid") != NULL))
{
StopOpenVPN(config);
/* Cert not yet valid */
ShowLocalizedMsg(GUI_NAME, ERR_CERT_NOT_YET_VALID, "");
}
/* Check for "Notified TAP-Win32 driver to set a DHCP IP" message */
if (((linepos=strstr(line, "Notified TAP-Win32 driver to set a DHCP IP")) != NULL))
{
strncpy(o.cnn[config].ip, linepos+54, 15); /* Copy IP address */
for (i=0; i < strlen(o.cnn[config].ip); i++)
if (o.cnn[config].ip[i] == '/' || o.cnn[config].ip[i] == ' ') break;
o.cnn[config].ip[i] = '\0';
}
}
/*
* Monitor the openvpn log output while CONNECTED
*/
void monitor_openvpnlog_while_connected(int config, char *line)
{
TCHAR buf[1000];
/* Check for Ping-Restart message */
if (strstr(line, "process restarting") != NULL)
{
/* Set connect_status = ReConnecting */
o.cnn[config].connect_status = RECONNECTING;
CheckAndSetTrayIcon();
/* Set Status Window Controls "ReConnecting" */
myLoadString(INFO_STATE_RECONNECTING);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_CONNECTING);
}
}
/*
* Monitor the openvpn log output while RECONNECTING
*/
void monitor_openvpnlog_while_reconnecting(int config, char *line)
{
TCHAR buf[1000];
char msg[200];
char msg2[200];
unsigned int i;
char *linepos;
/* Check for Connected message */
if (strstr(line, o.connect_string) != NULL)
{
o.cnn[config].connect_status = CONNECTED;
SetTrayIcon(CONNECTED);
/* Set Status Window Controls "Connected" */
myLoadString(INFO_STATE_CONNECTED);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_CONNECTED);
/* Show Tray Balloon msg */
if (o.show_balloon[0] == '2')
{
myLoadString(INFO_NOW_CONNECTED);
mysnprintf(msg, buf, o.cnn[config].config_name);
if (strlen(o.cnn[config].ip) > 0)
{
myLoadString(INFO_ASSIG_IP);
mysnprintf(msg2, buf, o.cnn[config].ip);
}
else
{
mysnprintf(msg2," ");
}
ShowTrayBalloon(msg, msg2);
}
}
/* Check for failed passphrase log message */
if ((strstr(line, "TLS Error: Need PEM pass phrase for private key") != NULL) ||
(strstr(line, "EVP_DecryptFinal:bad decrypt") != NULL) ||
(strstr(line, "PKCS12_parse:mac verify failure") != NULL) ||
(strstr(line, "Received AUTH_FAILED control message") != NULL) ||
(strstr(line, "Auth username is empty") != NULL))
{
o.cnn[config].failed_psw_attempts++;
o.cnn[config].failed_psw=1;
o.cnn[config].restart=true;
}
/* Check for "certificate has expired" message */
if ((strstr(line, "error=certificate has expired") != NULL))
{
/* Cert expired */
StopOpenVPN(config);
ShowLocalizedMsg(GUI_NAME, ERR_CERT_EXPIRED, "");
}
/* Check for "certificate is not yet valid" message */
if ((strstr(line, "error=certificate is not yet valid") != NULL))
{
StopOpenVPN(config);
/* Cert not yet valid */
ShowLocalizedMsg(GUI_NAME, ERR_CERT_NOT_YET_VALID, "");
}
/* Check for "Notified TAP-Win32 driver to set a DHCP IP" message */
if (((linepos=strstr(line, "Notified TAP-Win32 driver to set a DHCP IP")) != NULL))
{
strncpy(o.cnn[config].ip, linepos+54, 15); /* Copy IP address */
for (i=0; i < strlen(o.cnn[config].ip); i++)
if (o.cnn[config].ip[i] == '/' || o.cnn[config].ip[i] == ' ') break;
o.cnn[config].ip[i] = '\0';
}
}
/*
* Opens a log file and monitors the started OpenVPN process.
* All output from OpenVPN is written both to the logfile and
* to the status window.
*
* The output from OpenVPN is also watch for diffrent messages
* and appropriate actions are taken.
*/
void WatchOpenVPNProcess(int config)
{
char line[1024];
int ret;
char filemode[2] = "w\0";
FILE *fd;
char msg[200];
char msg2[200];
int i;
int iLineCount;
int LogLines = 0;
int logpos;
char *linepos;
HWND LogWindow;
TCHAR buf[1000];
/* set log file append/truncate filemode */
if (o.append_string[0] == '1')
filemode[0] = 'a';
/* Set Connect_Status = "Connecting" */
o.cnn[config].connect_status = CONNECTING;
/* Set Tray Icon = "Connecting" if no other connections are running */
CheckAndSetTrayIcon();
/* Set MenuStatus = "Connecting" */
SetMenuStatus(config, CONNECTING);
/* Clear failed_password flag */
o.cnn[config].failed_psw = 0;
/* Open log file */
if ((fd=fopen(o.cnn[config].log_path, filemode)) == NULL)
ShowLocalizedMsg (GUI_NAME, ERR_OPEN_LOG_WRITE, o.cnn[config].log_path);
LogWindow = GetDlgItem(o.cnn[config].hwndStatus, EDIT_LOG);
while(TRUE)
{
if ((ret=ReadLineFromStdOut(o.cnn[config].hStdOut, config, line)) == 1)
{
/* Do nothing if line length = 0 */
if (strlen(line) == 0) continue;
/* Write line to Log file */
if (fd != NULL)
{
fputs (line, fd);
fputc ('\n', fd);
fflush (fd);
}
/* Remove lines from LogWindow if it is getting full */
LogLines++;
if (LogLines > MAX_LOG_LINES)
{
logpos = SendMessage(LogWindow, EM_LINEINDEX, DEL_LOG_LINES, 0);
SendMessage(LogWindow, EM_SETSEL, 0, logpos);
SendMessage(LogWindow, EM_REPLACESEL, FALSE, (LPARAM) "");
LogLines -= DEL_LOG_LINES;
}
/* Write line to LogWindow */
strcat(line, "\r\n");
SendMessage(LogWindow, EM_SETSEL, (WPARAM) -1, (LPARAM) -1);
SendMessage(LogWindow, EM_REPLACESEL, FALSE, (LPARAM) line);
if (o.cnn[config].connect_status == CONNECTING) /* Connecting state */
monitor_openvpnlog_while_connecting(config, line);
if (o.cnn[config].connect_status == CONNECTED) /* Connected state */
monitor_openvpnlog_while_connected(config, line);
if (o.cnn[config].connect_status == RECONNECTING) /* ReConnecting state */
monitor_openvpnlog_while_reconnecting(config, line);
}
else break;
}
/* OpenVPN has been shutdown */
/* Close logfile filedesc. */
if (fd != NULL) fclose(fd);
/* Close StdIn/StdOut handles */
CloseHandle(o.cnn[config].hStdIn);
CloseHandle(o.cnn[config].hStdOut);
/* Close exitevent handle */
CloseHandle(o.cnn[config].exit_event);
o.cnn[config].exit_event = NULL;
/* Enable/Disable menuitems for this connections */
SetMenuStatus(config, DISCONNECTING);
/* Remove Proxy Auth file */
DeleteFile(o.proxy_authfile);
/* Process died outside our control */
if(o.cnn[config].connect_status == CONNECTED)
{
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
/* Set connect_status = "Not Connected" */
o.cnn[config].connect_status=DISCONNECTED;
/* Change tray icon if no more connections is running */
CheckAndSetTrayIcon();
/* Show Status Window */
myLoadString(INFO_STATE_DISCONNECTED);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_DISCONNECTED);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_DISCONNECT), FALSE);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_RESTART), FALSE);
SetForegroundWindow(o.cnn[config].hwndStatus);
ShowWindow(o.cnn[config].hwndStatus, SW_SHOW);
ShowLocalizedMsg(GUI_NAME, INFO_CONN_TERMINATED, o.cnn[config].config_name);
/* Close Status Window */
SendMessage(o.cnn[config].hwndStatus, WM_CLOSE, 0, 0);
}
/* We have failed to connect */
else if(o.cnn[config].connect_status == CONNECTING)
{
/* Set connect_status = "DisConnecting" */
o.cnn[config].connect_status=DISCONNECTING;
/* Change tray icon if no more connections is running */
CheckAndSetTrayIcon();
if ((o.cnn[config].failed_psw) &&
(o.cnn[config].failed_psw_attempts < o.psw_attempts))
{
/* Restart OpenVPN to make another attempt to connect */
PostMessage(o.hWnd, WM_COMMAND, (WPARAM) IDM_CONNECTMENU + config, 0);
}
else
{
/* Show Status Window */
myLoadString(INFO_STATE_FAILED);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_DISCONNECTED);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_DISCONNECT), FALSE);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_RESTART), FALSE);
SetForegroundWindow(o.cnn[config].hwndStatus);
ShowWindow(o.cnn[config].hwndStatus, SW_SHOW);
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
ShowLocalizedMsg(GUI_NAME, INFO_CONN_FAILED, o.cnn[config].config_name);
/* Set connect_status = "Not Connected" */
o.cnn[config].connect_status=DISCONNECTED;
/* Close Status Window */
SendMessage(o.cnn[config].hwndStatus, WM_CLOSE, 0, 0);
/* Reset restart flag */
o.cnn[config].restart=false;
}
}
/* We have failed to reconnect */
else if(o.cnn[config].connect_status == RECONNECTING)
{
/* Set connect_status = "DisConnecting" */
o.cnn[config].connect_status=DISCONNECTING;
/* Change tray icon if no more connections is running */
CheckAndSetTrayIcon();
if ((o.cnn[config].failed_psw) &&
(o.cnn[config].failed_psw_attempts < o.psw_attempts))
{
/* Restart OpenVPN to make another attempt to connect */
PostMessage(o.hWnd, WM_COMMAND, (WPARAM) IDM_CONNECTMENU + config, 0);
}
else
{
/* Show Status Window */
myLoadString(INFO_STATE_FAILED_RECONN);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
SetStatusWinIcon(o.cnn[config].hwndStatus, APP_ICON_DISCONNECTED);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_DISCONNECT), FALSE);
EnableWindow(GetDlgItem(o.cnn[config].hwndStatus, ID_RESTART), FALSE);
SetForegroundWindow(o.cnn[config].hwndStatus);
ShowWindow(o.cnn[config].hwndStatus, SW_SHOW);
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
ShowLocalizedMsg(GUI_NAME, INFO_RECONN_FAILED, o.cnn[config].config_name);
/* Set connect_status = "Not Connected" */
o.cnn[config].connect_status=DISCONNECTED;
/* Close Status Window */
SendMessage(o.cnn[config].hwndStatus, WM_CLOSE, 0, 0);
/* Reset restart flag */
o.cnn[config].restart=false;
}
}
/* We have chosed to Disconnect */
else if(o.cnn[config].connect_status == DISCONNECTING)
{
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
/* Set connect_status = "Not Connected" */
o.cnn[config].connect_status=DISCONNECTED;
/* Change tray icon if no more connections is running */
CheckAndSetTrayIcon();
if (o.cnn[config].restart)
{
/* Restart OpenVPN */
StartOpenVPN(config);
}
else
{
/* Close Status Window */
SendMessage(o.cnn[config].hwndStatus, WM_CLOSE, 0, 0);
}
}
/* We have chosed to Suspend */
else if(o.cnn[config].connect_status == SUSPENDING)
{
/* Zero psw attempt counter */
o.cnn[config].failed_psw_attempts = 0;
/* Set connect_status = "SUSPENDED" */
o.cnn[config].connect_status=SUSPENDED;
myLoadString(INFO_STATE_SUSPENDED);
SetDlgItemText(o.cnn[config].hwndStatus, TEXT_STATUS, buf);
/* Change tray icon if no more connections is running */
CheckAndSetTrayIcon();
}
/* Enable/Disable menuitems for this connections */
SetMenuStatus(config, DISCONNECTED);
}