#! @EXPECT_PATH@ --
##
## $Id: jlogin.in 3445 2016-08-10 17:15:38Z heas $
##
## @PACKAGE@ @VERSION@
@copyright@
#
# jlogin - juniper junos login
#

# Sometimes routers take awhile to answer (the default is 10 sec)
set timeoutdflt 120
# Some CLIs having problems if we write too fast (Extreme, PIX, Cat)
set send_human {.2 .1 .4 .2 1}

@login_top@

# Log into the router.
# returns: 0 on success, 1 on failure
proc login { router user passwd cmethod cyphertype identfile} {
    global spawn_id in_proc do_command do_script passphrase prompt
    global sshcmd
    set in_proc 1

    # try each of the connection methods in $cmethod until one is successful
    set progs [llength $cmethod]
    foreach prog [lrange $cmethod 0 end] {
	incr progs -1
	if [string match "telnet*" $prog] {
	    regexp {telnet(:([^[:space:]]+))*} $prog command suffix port
	    if {"$port" == ""} {
		set retval [ catch {spawn telnet $router} reason ]
	    } else {
		set retval [ catch {spawn telnet $router $port} reason ]
	    }
	    if { $retval } {
		send_user "\nError: telnet failed: $reason\n"
		return 1
	    }
	} elseif [string match "ssh*" $prog] {
	    # ssh to the router & try to login with or without an identfile.
	    # We use two calls to spawn since spawn does not seem to parse
	    # spaces correctly.
	    regexp {ssh(:([^[:space:]]+))*} $prog methcmd suffix port
	    set cmd $sshcmd
	    if {"$port" != ""} {
		set cmd "$cmd -p $port"
	    }
	    if {"$cyphertype" != ""} {
		set cmd "$cmd -c $cyphertype"
	    }
	    if {"$identfile" != ""} {
		set cmd "$cmd -i $identfile"
	    }
	        set retval [ catch {eval spawn [split "$cmd -x -l $user $router" { }]} reason ]
	    if { $retval } {
		send_user "\nError: $sshcmd failed: $reason\n"
		return 1
	    }
	} elseif ![string compare $prog "rsh"] {
	    send_error "\nError: unsupported method: rsh\n"
	    if { $progs == 0 } {
		return 1
	    }
	    continue
	} else {
	    send_user "\nError: unknown connection method: $prog\n"
	    return 1
	}
	sleep 0.3

	# This helps cleanup each expect clause.
	expect_after {
	    timeout {
		send_user "\nError: TIMEOUT reached\n"
		catch {close}; catch {wait};
		if { $in_proc} {
	            return 1
		} else {
	            continue
		}
            } eof {
		send_user "\nError: EOF received\n"
		catch {close}; catch {wait};
		if { $in_proc} {
	            return 1
		} else {
	            continue
		}
            }
	}

	# Here we get a little tricky.  There are several possibilities:
	# the router can ask for a username and passwd and then
	# talk to the TACACS server to authenticate you, or if the
	# TACACS server is not working, then it will use the enable
	# passwd.  Or, the router might not have TACACS turned on,
	# then it will just send the passwd.
	expect {
	    -re "(Connection refused|Secure connection \[^\n\r]+ refused|Connection closed by)" {
		catch {close}; catch {wait};
		if !$progs {
		   send_user "\nError: Connection Refused ($prog)\n"; return 1
		}
	    }
            eof { send_user "\nError: Couldn't login\n"; catch {wait}; return 1
	    } -nocase "unknown host\r\n" {
		catch {close}; catch {wait};
		send_user "\nError: Unknown host\n"; catch {wait}; return 1
	    } "Host is unreachable" {
		catch {close}; catch {wait};
		send_user "\nError: Host Unreachable!\n"; catch {wait}; return 1
	    } "No address associated with name" {
		catch {close}; catch {wait};
		send_user "\nError: Unknown host\n"; catch {wait}; return 1
	    }
	    "Login incorrect" {
			  send_user "\nError: Check your password for $router\n"
			  catch {close}; catch {wait}; return 1
			}
	    -re "Enter passphrase.*: " {
		# sleep briefly to allow time for stty -echo
		sleep 1
		send -- "$passphrase\r"
		exp_continue }
	    -re "(Host key not found |The authenticity of host .* be established).* \\(yes/no\\)\\?" {
		send "yes\r"
		send_user "\nHost $router added to the list of known hosts.\n"
		exp_continue }
	    -re "HOST IDENTIFICATION HAS CHANGED.* \\(yes/no\\)\\?" {
		send "no\r"
		send_user "\nError: The host key for $router has changed.  Update the SSH known_hosts file accordingly.\n"
		return 1 }
	    -re "HOST IDENTIFICATION HAS CHANGED\[^\n\r]+" {
		send_user "\nError: The host key for $router has changed.  Update the SSH known_hosts file accordingly.\n"
		return 1 }
	    -re "Offending key for .* \\(yes/no\\)\\?" {
		send "no\r"
		send_user "\nError: host key mismatch for $router.  Update the SSH known_hosts file accordingly.\n"
		return 1 }
	    -nocase -re "^warning: remote host denied authentication agent forwarding." {
		exp_continue;
	    }
	    -re "(Username|\[\r\n]login):"	{
						  send -- "$user\r"
						  exp_continue
	    					}
	    "\[Pp]assword:"			{
						  sleep 1; send -- "$passwd\r"
						  exp_continue
						}
	    -re "$prompt"		{ break; }
	    denied	{ send_user "\nError: Check your password for $router\n"
	                  catch {close}; catch {wait}; return 1
	                }
	}
    }

    # we are logged in, now figure out the full prompt
    send "\r"
    expect {
	-re "(\r\n|\n)"		{ exp_continue; }
	-re "^\[^ ]+$prompt"	{ set prompt $expect_out(0,string);
				  regsub ">" $prompt "\[#>]" prompt;
				}
    }

    set in_proc 0
    return 0
}

# Run commands given on the command line.
proc run_commands { prompt command } {
    global in_proc
    set in_proc 1

    send "set cli complete-on-space off\r"
    expect -re $prompt	{}
    send "set cli screen-length 0\r"
    expect -re $prompt	{}

    # handle escaped ;s in commands, and ;; and ^;
    regsub -all {([^\\]);;} $command "\\1;\u002;" esccommand
    regsub {^;} $esccommand "\u002;" command
    set sep "\\1\u001"
    regsub -all {([^\\])\;} $command "$sep" esccommand
    set sep "\u001"
    set commands [split $esccommand $sep]
    set num_commands [llength $commands]
    for {set i 0} {$i < $num_commands} { incr i} {
	send "[lindex $commands $i]\r"
	expect {
	    -re "^\[^\n\r *]*$prompt $"	{}
	    -re "^\[^\n\r]*$prompt."	{ exp_continue }
	    -re "(\r\n|\n)"			{ exp_continue }
	}
    }
    send "quit\r"
    expect {
	"\n"					{ exp_continue }
	timeout					{ catch {close}; catch {wait};
						  return 0
						}
	eof					{ return 0 }
    }
    set in_proc 0
}

#
# For each router... (this is main loop)
#
source_password_file $password_file
set in_proc 0
set exitval 0
# if we have dont have a tty, we need some additional terminal settings
if [catch {open /dev/tty w} ttyid] {
    # no tty, ie: cron
    set spawnopts "-nottycopy"
    set stty_init "cols 132"
} else {
    catch {close ttyid} reason
}
foreach router [lrange $argv $i end] {
    set router [string tolower $router]
    send_user "$router\n"

    # device timeout
    set timeout [find timeout $router]
    if { [llength $timeout] == 0 } {
	set timeout $timeoutdflt
    }

    set prompt ">"

    # Figure out username
    if {[info exists username]} {
      # command line username
      set loginname $username
    } else {
      set loginname [join [find user $router] ""]
      if { "$loginname" == "" } { set loginname $default_user }
    }

    # Figure out loginname's password (if different from the vty password)
    if {[info exists userpasswd]} {
      # command line passwd
      set passwd $userpasswd
    } else {
      set passwd [join [lindex [find userpassword $router] 0] ""]
      if { "$passwd" == "" } {
        set passwd [join [lindex [find password $router] 0] ""]
        if { "$passwd" == "" } {
	  send_user "\nError: no password for $router in $password_file.\n"
	  continue
        }
      }
    }

    # Figure out identity file to use
    set identfile [join [lindex [find identity $router] 0] ""]

    # Figure out passphrase to use
    if {[info exists avpassphrase]} {
	set passphrase $avpassphrase
    } else {
	set passphrase [join [lindex [find passphrase $router] 0] ""]
    }
    if { ! [string length "$passphrase"]} {
	set passphrase $passwd
    }

    # Figure out ssh cypher type
    if {[info exists cypher]} {
      # command line ssh cypher type
      set cyphertype $cypher
    } else {
      set cyphertype [find cyphertype $router]
    }

    # Figure out connection method
    set cmethod [find method $router]
    if { "$cmethod" == "" } { set cmethod {{telnet} {ssh}} }

    # Figure out the SSH executable name
    set sshcmd [join [lindex [find sshcmd $router] 0] ""]
    if { "$sshcmd" == "" } { set sshcmd {ssh} }

    # if [-mM], skip do not login
    if { $do_cloginrcdbg > 0 } { continue; }

    # Login to the router
    if {[login $router $loginname $passwd $cmethod $cyphertype $identfile]} {
	incr exitval
	continue
    }

    if { $do_command } {
	if {[run_commands $prompt $command]} {
	    incr exitval
	    continue
	}
    } elseif { $do_script } {
	send "set cli complete-on-space off\r"
	expect -re $prompt	{}
	send "set cli screen-length 0\r"
	expect -re $prompt	{}
	send "set cli screen-width 0\r"
	expect -re $prompt	{}
	source $sfile
	catch {close};
    } else {
	label $router
	log_user 1
	interact
    }

    # End of for each router
    catch {wait};
    sleep 0.3
}
exit $exitval
