#! @EXPECT_PATH@ --
##
## @PACKAGE@ @VERSION@
@copyright@
#
# nslogin - Netscaler login
#
# Hacks from Anshuman Kanwar.

# The default is to automatically enable
set avenable 0
# 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 enapasswd cmethod cyphertype } {
    global spawn_id in_proc do_command do_script
    global prompt u_prompt p_prompt e_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 compare $prog "ssh"] {
	    regexp {ssh(:([^[:space:]]+))*} $prog methcmd suffix port
	    set cmd $sshcmd
	    if {"$port" != ""} {
		set cmd "$cmd -p $port"
	    }
	    if {"$cyphertype" != ""} {
		set cmd "$cmd -c $cyphertype"
	    }
	    set retval [ catch {eval spawn [split "$cmd -x -l $user $router" { }]} reason ]
	    if { $retval } {
		send_user "\nError: $cmd failed: $reason\n"
		return 1
	    }
	} elseif ![string compare $prog "telnet"] {
	    send_error "\nError: unsupported method: telnet\n"
	    if { $progs == 0 } {
		return 1
	    }
	    continue
	} 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 {
		global in_proc
		send_user "\nError: TIMEOUT reached\n"
		catch {close}; catch {wait};
		if {$in_proc} {
		    return 1
		} else {
		    continue
		}
	    } eof {
		global in_proc
		send_user "\nError: EOF received\n"
		catch {close}; catch {wait};
		if {$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.
    # if telnet fails with connection refused, try ssh
    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"; wait; return 1 }
	-nocase "unknown host\r" {
	    catch {close}; catch {wait};
	    send_user "\nError: Unknown host\n"; wait; return 1
	}
	"Host is unreachable" {
	    catch {close}; catch {wait};
	    send_user "\nError: Host Unreachable!\n"; wait; return 1
	}
	"No address associated with name" {
	    catch {close}; catch {wait};
	    send_user "\nError: Unknown host\n"; wait; return 1
	}
	-re "(Host key not found |The authenticity of host .* be established)" {
	    expect {
		-re "\\(yes\/no\[^\\)]*\\)\\?" {
					  send "yes\r";
					  send_user "\nHost $router added to the list of known hosts.\n"
					 }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    exp_continue
	}
	-re "HOST IDENTIFICATION HAS CHANGED" {
	    send_user "\nError: The host key for $router has changed.  Update the SSH known_hosts file accordingly.\n"
	    expect {
		-re "\\(yes\/no\\)\\?"	{ send "no\r" }
		-re " strict checking\.\[\r\n]+" { }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    catch {close}; catch {wait};
	    return 1
	}
	-re "Offending key for " {
	    send_user "\nError: host key mismatch for $router.  Update the SSH known_hosts file accordingly.\n"
	    expect {
		-re "\\(yes\/no\\)\\?"	{ send "no\r" }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    catch {close}; catch {wait};
	    return 1
	}
	-re "(denied|Sorry)"	{
				  send_user "\nError: Check your passwd for $router\n"
				  catch {close}; catch {wait}; return 1
				}
	"Login failed"		{
				  send_user "\nError: Check your passwd for $router\n"
				  return 1
				}
	-re "% (Bad passwords|Authentication failed)"	{
				  send_user "\nError: Check your passwd for $router\n"
				  return 1
				}
	# newer netscaler code (NS8.0: Build 47.8) the password prompt is
	# "Password:" not "user@hosts's password:"
	-re "(@\[^\r\n]+ )?$p_prompt"	{
					  # ssh pwd prompt
					  sleep 1
					  send -- "$userpswd\r"
					  exp_continue
					}

	"$prompt"		{ break; }
	"Login invalid"		{
				  send_user "\nError: Invalid login\n";
				  catch {close}; catch {wait}; return 1
				}
     }
    }

    set in_proc 0
    return 0
}


# Run commands given on the command line.

proc run_commands { prompt command } {
    global do_interact in_proc
    set in_proc 1

    # escape any parens in the prompt, such as "(enable)"
    regsub -all "\[)(]" $prompt {\\&} reprompt
    # this is the only way i see to get rid of more prompts in o/p..grrrrr
    log_user 0

    # handle escaped ;s in commands, and ;; and ^;
    regsub -all {([^\\]);} $command "\\1\u0002;" esccommand
    regsub -all {([^\\]);;} $esccommand "\\1;\u0002;" command
    regsub {^;} $command "\u0002;" esccommand
    regsub -all {[\\];} $esccommand ";" command
    regsub -all {\u0002;} $command "\u0002" esccommand
    set sep "\u0002"
    set commands [split $esccommand $sep]
    set num_commands [llength $commands]
    # the pager can not be turned off on the PIX, so we have to look
    # for the "More" prompt.  the extreme is equally obnoxious, with a
    # global switch in the config.
    for {set i 0} {$i < $num_commands} { incr i} {
	send -- "[subst -nocommands [lindex $commands $i]]\r"
	expect {
	    -re "\b+"				{ exp_continue }
	    -re "^\[^\n\r *]*$reprompt"		{ send_user -- "$expect_out(buffer)"
						}
	    -re "^\[^\n\r]*$reprompt."		{ send_user -- "$expect_out(buffer)"
						  exp_continue
						}
	    -re "\[\n\r]+"			{ send_user -- "$expect_out(buffer)"
						  exp_continue
						}
	    -re "\[^\r\n]*Press <SPACE> to cont\[^\r\n]*" {
						  send " "
						  # bloody ^[[2K after " "
						  expect {
						    -re "^\[^\r\n]*\r" {}
						  }
						  exp_continue
						}
	    -re "^ --More--\[^\n\r]*"		{
						  send " "
						  exp_continue
						}
	    -re "^<-+ More -+>\[^\n\r]*"	{
						  send_user -- "$expect_out(buffer)"
						  send " "
						  exp_continue
						}
	}
    }
    log_user 1

    if { $do_interact == 1 } {
	interact
	return 0
    }

    send "quit\r"
    expect {
        "Do you wish to save your configuration changes" {
                                                  send "n\r"
                                                  exp_continue
                                                }
        "\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
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
    }

    # Figure out prompt.
    set prompt ">"

    # look for noenable option in .cloginrc
    if { [find noenable $router] == "1" } {
	set enable 0
    } else {
	set enable $avenable
    }

    # 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
	}
	if { $enable && $autoenable == 0 && [llength $pswd] < 2 } {
	    send_user -- "\nError: no enable password for $router in $password_file.\n"
	    continue
	}
	if { $do_passwd } {
	    set passwd [join [lindex $pswd 0] ""]
	} else {
	    set passwd $userpasswd
	}
	if { $do_enapasswd } {
	    set enapasswd [join [lindex $pswd 1] ""]
	} else {
	    set enapasswd $enapasswd
	}
    } else {
	set passwd $userpasswd
	set enapasswd $enapasswd
    }

    # 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 enable username
    if {[info exists enausername]} {
      # command line enausername
      set enauser $enausername
    } else {
      set enauser [join [find enauser $router] ""]
      if { "$enauser" == "" } { set enauser $ruser }
    }

    # Figure out prompts
    set u_prompt [find userprompt $router]
    if { "$u_prompt" == "" } {
	set u_prompt "(Username|Login|login|user name):"
    } else {
	set u_prompt [join [lindex $u_prompt 0] ""]
    }
    set p_prompt [find passprompt $router]
    if { "$p_prompt" == "" } {
	set p_prompt "(\[Pp]assword|passwd):"
    } else {
	set p_prompt [join [lindex $p_prompt 0] ""]
    }
    set e_prompt [find enableprompt $router]
    if { "$e_prompt" == "" } {
	set e_prompt "\[Pp]assword:"
    } else {
	set e_prompt [join [lindex $e_prompt 0] ""]
    }

    # 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} }

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

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

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

    if { $do_command } {
	if {[run_commands $prompt $command]} {
	    incr exitval
	    continue
	}
    } elseif { $do_script } {
	# If the prompt is (enable), then we are on a switch and the
	# command is "set length 0"; otherwise its "term length 0".
	if [ regexp -- ".*> .*enable" "$prompt" ] {
	    send "set length 0\r"
	    send "set logging session disable\r"
	} else {
	    send "term length 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
