Add TCP ping fallback for servers that block ICMP (XRay, VLESS, Reality)

Made-with: Cursor

_test_tcp_ping.py

@@ -0,0 +1,58 @@
+import paramiko
+
+host = "185.250.47.205"
+user = "root"
+pwd = "0i1sbf9NM36FkG5dFH"
+
+test_script = """#!/bin/bash
+tcp_ping() {
+    local ip="$1" port="$2" tout="${3:-3}"
+    local raw
+    raw=$(curl -so /dev/null -w '%{time_connect}' --max-time "$tout" --connect-timeout "$tout" "http://${ip}:${port}/" 2>/dev/null)
+    [ -z "$raw" ] && return 1
+    local ms
+    ms=$(awk "BEGIN {v=$raw*1000; if(v<0.5) exit 1; printf \\"%.2f\\", v}" 2>/dev/null) || return 1
+    echo "$ms"
+}
+
+smart_ping() {
+    local ip="$1" tout="${2:-3}" port="${3:-}"
+    local ms
+    ms=$(ping -c 1 -W "$tout" "$ip" 2>/dev/null | sed -n 's/.*time=\\([0-9.]*\\).*/\\1/p')
+    if [ -n "$ms" ]; then echo "ICMP: ${ms}ms"; return 0; fi
+    [ -z "$port" ] && { echo "NO_PORT"; return 1; }
+    ms=$(tcp_ping "$ip" "$port" "$tout")
+    if [ -n "$ms" ]; then echo "TCP: ${ms}ms"; return 0; fi
+    echo "TIMEOUT"
+    return 1
+}
+
+echo "=== Test 1: ICMP to 8.8.8.8 ==="
+smart_ping "8.8.8.8" 3
+
+echo "=== Test 2: ICMP to 193.124.225.26 (no port) ==="
+smart_ping "193.124.225.26" 3
+
+echo "=== Test 3: smart_ping 193.124.225.26 TCP:443 ==="
+smart_ping "193.124.225.26" 3 "443"
+
+echo "=== Test 4: tcp_ping raw ==="
+result=$(tcp_ping "193.124.225.26" "443" 3)
+echo "result=$result rc=$?"
+"""
+
+ssh = paramiko.SSHClient()
+ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+ssh.connect(host, username=user, password=pwd, timeout=10)
+
+sftp = ssh.open_sftp()
+with sftp.file("/tmp/_kaskad_test.sh", "w") as f:
+    f.write(test_script)
+sftp.close()
+
+stdin, stdout, stderr = ssh.exec_command("bash /tmp/_kaskad_test.sh", timeout=30)
+print(stdout.read().decode(errors="replace"))
+err = stderr.read().decode(errors="replace")
+if err:
+    print("STDERR:", err)
+ssh.close()