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which( )
{
# on some systems 'which' command is considered deprecated and not installed by default
# 'command -v' replacement does not work exactly the same way. it outputs shell aliases if present
# $1 - executable name
local IFS = :
for p in $PATH ; do
[ -x " $p / $1 " ] && {
echo " $p / $1 "
return 0
}
done
return 1
}
exists( )
{
which " $1 " >/dev/null 2>/dev/null
}
existf( )
{
type " $1 " >/dev/null 2>/dev/null
}
whichq( )
{
which $1 2>/dev/null
}
exist_all( )
{
while [ -n " $1 " ] ; do
exists " $1 " || return 1
shift
done
return 0
}
on_off_function( )
{
# $1 : function name on
# $2 : function name off
# $3 : 0 - off, 1 - on
local F = " $1 "
[ " $3 " = "1" ] || F = " $2 "
shift
shift
shift
" $F " " $@ "
}
contains( )
{
# check if substring $2 contains in $1
[ " ${ 1 #* $2 } " != " $1 " ]
}
starts_with( )
{
# $1 : what
# $2 : starts with
case " $1 " in
" $2 " *)
return 0
; ;
esac
return 1
}
find_str_in_list( )
{
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# $1 - string
# $2 - space separated values
local v
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[ -n " $1 " ] && {
for v in $2 ; do
[ " $v " = " $1 " ] && return 0
done
}
return 1
}
end_with_newline( )
{
local c = " $( tail -c 1) "
[ " $c " = "" ]
}
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trim( )
{
awk '{gsub(/^ +| +$/,"")}1'
}
dir_is_not_empty( )
{
# $1 - directory
local n
[ -d " $1 " ] || return 1
n = $( ls " $1 " | wc -c | xargs)
[ " $n " != 0 ]
}
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append_separator_list( )
{
# $1 - var name to receive result
# $2 - separator
# $3 - quoter
# $4,$5,... - elements
local _var = " $1 " sep = " $2 " quo = " $3 " i
eval i = " \$ $_var "
shift; shift; shift
while [ -n " $1 " ] ; do
if [ -n " $i " ] ; then
i = " $i $sep $quo $1 $quo "
else
i = " $quo $1 $quo "
fi
shift
done
eval $_var = "\$i"
}
make_separator_list( )
{
eval $1 = ''
append_separator_list " $@ "
}
make_comma_list( )
{
# $1 - var name to receive result
# $2,$3,... - elements
local var = " $1 "
shift
make_separator_list $var , '' " $@ "
}
make_quoted_comma_list( )
{
# $1 - var name to receive result
# $2,$3,... - elements
local var = " $1 "
shift
make_separator_list $var , '"' " $@ "
}
unique( )
{
local i
for i in " $@ " ; do echo $i ; done | sort -u | xargs
}
is_linked_to_busybox( )
{
local IFS F P
IFS = :
for path in $PATH ; do
F = $path /$1
P = " $( readlink $F ) "
if [ -z " $P " ] && [ -x $F ] && [ ! -L $F ] ; then return 1; fi
[ " ${ P %busybox* } " != " $P " ] && return
done
}
get_dir_inode( )
{
local dir = " $1 "
[ -L " $dir " ] && dir = $( readlink " $dir " )
ls -id " $dir " | awk '{print $1}'
}
linux_min_version( )
{
# $1 - major ver
# $2 - minor ver
local V1 = $( sed -nre 's/^Linux version ([0-9]+)\.[0-9]+.*$/\1/p' /proc/version)
local V2 = $( sed -nre 's/^Linux version [0-9]+\.([0-9]+).*$/\1/p' /proc/version)
[ -n " $V1 " -a -n " $V2 " ] && [ " $V1 " -gt " $1 " -o " $V1 " -eq " $1 " -a " $V2 " -ge " $2 " ]
}
linux_get_subsys( )
{
local INIT = " $( sed 's/\x0/\n/g' /proc/1/cmdline | head -n 1) "
[ -L " $INIT " ] && INIT = $( readlink " $INIT " )
INIT = " $( basename " $INIT " ) "
if [ -f "/etc/openwrt_release" ] && [ " $INIT " = "procd" ] ; then
SUBSYS = openwrt
elif [ -x "/bin/ndm" ] ; then
SUBSYS = keenetic
else
# generic linux
SUBSYS =
fi
}
openwrt_fw3( )
{
[ ! -x /sbin/fw4 -a -x /sbin/fw3 ]
}
openwrt_fw4( )
{
[ -x /sbin/fw4 ]
}
openwrt_fw3_integration( )
{
[ " $FWTYPE " = iptables ] && openwrt_fw3
}
create_dev_stdin( )
{
[ -e /dev/stdin ] || ln -s /proc/self/fd/0 /dev/stdin
}
call_for_multiple_items( )
{
# $1 - function to get an item
# $2 - variable name to put result into
# $3 - space separated parameters to function $1
local i item items
for i in $3 ; do
$1 item $i
[ -n " $item " ] && {
if [ -n " $items " ] ; then
items = " $items $item "
else
items = " $item "
fi
}
done
eval $2 = \" $items \"
}
fix_sbin_path( )
{
local IFS = ':'
printf "%s\n" $PATH | grep -Fxq '/usr/sbin' || PATH = " /usr/sbin: $PATH "
printf "%s\n" $PATH | grep -Fxq '/sbin' || PATH = " /sbin: $PATH "
export PATH
}
# it can calculate floating point expr
calc( )
{
awk " BEGIN { print $* } " ;
}
fsleep_setup( )
{
[ -n " $FSLEEP " ] || {
if sleep 0.001 2>/dev/null; then
FSLEEP = 1
elif busybox usleep 1 2>/dev/null; then
FSLEEP = 2
else
local errtext = " $( read -t 0.001 2>& 1) "
if [ -z " $errtext " ] ; then
FSLEEP = 3
# newer openwrt has ucode with system function that supports timeout in ms
elif ucode -e "system(['sleep','1'], 1)" 2>/dev/null; then
FSLEEP = 4
# older openwrt may have lua and nixio lua module
elif lua -e 'require "nixio".nanosleep(0,1)' 2>/dev/null ; then
FSLEEP = 5
else
FSLEEP = 0
fi
fi
}
}
msleep( )
{
# $1 - milliseconds
case " $FSLEEP " in
1)
sleep $( calc $1 /1000)
; ;
2)
busybox usleep $( calc $1 *1000)
; ;
3)
read -t $( calc $1 /1000)
; ;
4)
ucode -e " system(['sleep','2147483647'], $1 ) "
; ;
5)
lua -e " require 'nixio'.nanosleep( $(( $1 / 1000 )) , $( calc $1 %1000*1000000) ) "
; ;
*)
sleep $(( ( $1 + 999 ) / 1000 ))
esac
}
minsleep( )
{
msleep 100
}
replace_char( )
{
local a = $1
local b = $2
shift; shift
echo " $@ " | tr $a $b
}
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replace_str( )
{
local a = $( echo " $1 " | sed 's/\//\\\//g' )
local b = $( echo " $2 " | sed 's/\//\\\//g' )
shift; shift
echo " $@ " | sed " s/ $a / $b /g "
}
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setup_md5( )
{
[ -n " $MD5 " ] && return
MD5 = md5sum
exists $MD5 || MD5 = md5
}
random( )
{
# $1 - min, $2 - max
local r rs
setup_md5
if [ -c /dev/urandom ] ; then
read rs </dev/urandom
else
rs = " $RANDOM $RANDOM $( date) "
fi
# shells use signed int64
r = 1$( echo $rs | $MD5 | sed 's/[^0-9]//g' | cut -c 1-17)
echo $(( ( $r % ( $2 - $1 + 1 )) + $1 ) )
}
shell_name( )
{
[ -n " $SHELL_NAME " ] || {
[ -n " $UNAME " ] || UNAME = " $( uname) "
if [ " $UNAME " = "Linux" ] ; then
SHELL_NAME = " $( readlink /proc/$$ /exe) "
SHELL_NAME = " $( basename " $SHELL_NAME " ) "
else
SHELL_NAME = $( ps -p $$ -o comm = )
fi
[ -n " $SHELL_NAME " ] || SHELL_NAME = " $( basename " $SHELL " ) "
}
}
process_exists( )
{
if exists pgrep; then
pgrep ^$1 $ >/dev/null
elif exists pidof; then
pidof $1 >/dev/null
else
return 1
fi
}
win_process_exists( )
{
tasklist /NH /FI " IMAGENAME eq ${ 1 } .exe " | grep -q " ^ ${ 1 } .exe "
}
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alloc_num( )
{
# $1 - source var name
# $2 - target var name
# $3 - min
# $4 - max
local v
eval v = " \$ $2 "
# do not replace existing value
[ -n " $v " ] && return
eval v = " \$ $1 "
[ -n " $v " ] || v = $3
eval $2 = " $v "
v = $(( v + 1 ))
[ $v -gt $4 ] && v = $3
eval $1 = " $v "
}
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std_ports( )
{
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TPWS_PORTS_IPT = $( replace_char - : $TPWS_PORTS )
NFQWS_PORTS_TCP_IPT = $( replace_char - : $NFQWS_PORTS_TCP )
NFQWS_PORTS_TCP_KEEPALIVE_IPT = $( replace_char - : $NFQWS_PORTS_TCP_KEEPALIVE )
NFQWS_PORTS_UDP_IPT = $( replace_char - : $NFQWS_PORTS_UDP )
NFQWS_PORTS_UDP_KEEPALIVE_IPT = $( replace_char - : $NFQWS_PORTS_UDP_KEEPALIVE )
}
has_bad_ws_options( )
{
# $1 - nfqws/tpws opts
# <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
# <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> , <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
# <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> , <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> . <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> custom script.
# custom script - <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> , <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> , <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> , <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> .
# <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> IPSET <20> <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> , <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> nfqws <20> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
# --ipset <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <20> LINUX <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> ipset (<28> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> , Android).
# <20> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <20> <> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <20> <> LINUX <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
contains " $1 " "--ipset"
}
check_bad_ws_options( )
{
# $1 - 0 = stop, 1 = start
# $2 - nfqws/tpws options
if [ " $1 " = 1 ] && has_bad_ws_options " $2 " ; then
echo " !!! REFUSING TO USE BAD OPTIONS : $2 "
return 1
else
return 0
fi
}
help_bad_ws_options( )
{
echo "WARNING ! you have specified --ipset option"
echo " WARNING ! it would work but on $UNAME it's not the best option "
echo "WARNING ! you should use kernel mode sets. they are much more efficient."
echo "WARNING ! to use ipsets you have to write your own custom script"
echo "WARNING ! installer will stop here to prevent distribution of easy to use but bad copy-paste solutions"
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}
