#! @EXPECT_PATH@ --
##
## $Id: mtlogin.in 3445 2016-08-10 17:15:38Z heas $
##
## @PACKAGE@ @VERSION@
@copyright@
#
# mtlogin - MikroTik router login
#
# bootc@bootc.net wrote this (Chris Boot)
#

# Sometimes routers take awhile to answer (the default is 10 sec)
set timeoutdflt 45
# 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 userpswd passwd prompt cmethod cyphertype identfile } {
    global spawn_id in_proc do_command do_script
    global u_prompt p_prompt sshcmd
    set in_proc 1
    set uprompt_seen 0

    # 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.
	    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+ct200w $router" { }]} reason]
	    if { $retval } {
		send_user "\nError: $cmd 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
	    }
	}
    }

    expect {
	"Connection refused" {
	    catch {close}; catch {wait};
	    sleep 0.3
		expect eof
		send_user "\nError: Connection Refused\n"; wait; return 1
	} eof { send_user "\nError: Couldn't login\n"; wait; return 1
	} "Unknown host\r\n" {
	    expect eof
	    send_user "\nError: Unknown host\n"; wait; return 1
	} "Host is unreachable" {
	    expect eof
	    send_user "\nError: Host Unreachable!\n"; wait; return 1
	} "No address associated with name" {
	    expect eof
	    send_user "\nError: Unknown host\n"; wait; return 1
	}
	-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 $router.  Update the SSH known_hosts file accordingly.\n"
	    return 1 }
	-nocase -re "^warning: remote host denied authentication agent forwarding." {
	    exp_continue;
	}
	-re "Enter passphrase.*: "	{
					  # sleep to allow time for stty -echo
					  sleep .3
					  send -- "$passphrase\r"
					  exp_continue
					}

	-re "$u_prompt"			{
					  send -- "$user+ct200w\r"
					  set uprompt_seen 1
					  exp_continue
					}
	-re "$p_prompt"			{
					  sleep 1
					  if {$uprompt_seen == 1} {
						send -- "$userpswd\r"
					  } else {
						send -- "$passwd\r"
					  }
					  exp_continue
					}
	-re "^Confirm seeing above note" {
					  send "y\r"
					  exp_continue
					}
	"Password incorrect"	{ send_user "\nError: Check your password for $router\n";
				  catch {close}; catch {wait}; return 1 }
	-re "$prompt"	{ break; }
	denied		{ send_user "\nError: Check your passwd for $router\n"
			  catch {close}; catch {wait}; return 1
			}
	"\r\n"		{ exp_continue; }
    }
  }
    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

    # escape any parens in the prompt, such as "(enable)"
    regsub -all "\[)(]" $prompt {\\&} reprompt

    # 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 -- "[subst -nocommands [lindex $commands $i]]\r"
	expect {
	    -re "^\[^\n\r]*$reprompt"		{}
	    -re "^\[^\n\r ]*>>.*$reprompt"	{ exp_continue }
	    -re "\[\n\r]+"			{ exp_continue }
	}
    }
    send "quit\r"
    expect {
	-re "^WARNING: There are unsaved configuration changes." {
						 send "y\r"
						 exp_continue
						}
	"\n"					{ exp_continue }
	"\[^\n\r *]*Session terminated"		{ return 0 }
	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
# http://www.shrubbery.net/pipermail/rancid-discuss/2015-January/007984.html
# 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"

    # Figure out prompt.
    set prompt "] > "
    # alteon only "enables" based on the password used at login time
    set autoenable 1
    set enable 0

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

    # Figure out passwords
    if { $do_passwd } {
      set pswd [find password $router]
      if { [llength $pswd] == 0 } {
	send_user "\nError - no password for $router in $password_file.\n"
	continue
      }
      set passwd [join [lindex $pswd 0] ""]
    }

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

    # Figure out username's password (if different from the vty password)
    if {[info exists userpasswd]} {
      # command line username
      set userpswd $userpasswd
    } else {
      set userpswd [join [find userpassword $router] ""]
      if { "$userpswd" == "" } { set userpswd $passwd }
    }

    # Figure out prompts
    set u_prompt [find userprompt $router]
    if { "$u_prompt" == "" } {
	set u_prompt "Login:"
    } else {
	set u_prompt [join [lindex $u_prompt 0] ""]
    }
    set p_prompt [find passprompt $router]
    if { "$p_prompt" == "" } {
	set p_prompt "\[Pp]assword:"
    } else {
	set p_prompt [join [lindex $p_prompt 0] ""]
    }

    # 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 cypher type
    if {[info exists cypher]} {
      # command line 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} }

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

    if { $do_command } {
	if {[run_commands $prompt $command]} {
	    incr exitval
	    continue
	}
    } elseif { $do_script } {
	source $sfile
	catch {close};
    } else {
	label $router
	log_user 1
	interact
    }

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