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feat(net): Proactive SSH banner transmission and global remote internet access helper (scripts/remote_access.sh)
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subhobhai943 committed
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@@ -180,6 +180,17 @@ void tcp_receive(const uint8_t* packet, uint16_t length, uint32_t src_ip) {
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}
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// Handle Data / ACK
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if (conn->state == TCP_STATE_SYN_RCVD) {
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conn->state = TCP_STATE_ESTABLISHED;
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if (is_ssh_port && payload_len == 0) {
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const char* banner = SSH_BANNER;
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uint16_t blen = (uint16_t)strlen(banner);
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tcp_send_packet(src_ip, dst_port, src_port, conn->seq_num, conn->ack_num,
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TCP_FLAG_PSH | TCP_FLAG_ACK, banner, blen);
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conn->seq_num += blen;
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return;
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}
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}
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conn->state = TCP_STATE_ESTABLISHED;
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if (payload_len > 0) {
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@@ -77,7 +77,57 @@ int sshd_process_packet(const char* in_data, size_t in_len, char* out_resp, size
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return (int)strlen(out_resp);
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}
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snprintf(out_resp, max_resp_len, "SUB-OS Remote Terminal Ready\n");
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// Process remote shell command or greeting
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char clean_cmd[128];
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strncpy(clean_cmd, in_data, sizeof(clean_cmd) - 1);
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clean_cmd[sizeof(clean_cmd) - 1] = '\0';
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for (size_t i = 0; i < strlen(clean_cmd); i++) {
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if (clean_cmd[i] == '\r' || clean_cmd[i] == '\n') {
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clean_cmd[i] = '\0';
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break;
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}
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}
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if (strlen(clean_cmd) == 0) {
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snprintf(out_resp, max_resp_len,
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"=====================================================\r\n"
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" SUB-OS Enterprise Remote Shell v0.2.0 (x86_64) \r\n"
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"=====================================================\r\n"
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"sub-os:/> ");
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return (int)strlen(out_resp);
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}
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if (strcmp(clean_cmd, "uname -a") == 0 || strcmp(clean_cmd, "uname") == 0) {
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snprintf(out_resp, max_resp_len, "SUB-OS sub-node 0.2.0-lts (x86_64) #1 SMP PREEMPT Sun Aug 16 2026 x86_64 GNU/LazyBox\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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} else if (strcmp(clean_cmd, "whoami") == 0) {
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snprintf(out_resp, max_resp_len, "root\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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} else if (strcmp(clean_cmd, "help") == 0) {
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snprintf(out_resp, max_resp_len, "Available commands: uname, whoami, free, systemctl, ps, uptime, help, exit\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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} else if (strcmp(clean_cmd, "free") == 0) {
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snprintf(out_resp, max_resp_len,
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" total used free shared buff/cache available\r\n"
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"Mem: 130944 8192 122752 0 110 122752\r\n"
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"Heap: 4096 633 3462\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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} else if (strcmp(clean_cmd, "uptime") == 0) {
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snprintf(out_resp, max_resp_len, " 13:45:00 up 12 min, 1 user, load average: 0.04, 0.02, 0.00\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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} else if (strcmp(clean_cmd, "systemctl") == 0) {
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snprintf(out_resp, max_resp_len,
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" UNIT LOAD ACTIVE SUB DESCRIPTION\r\n"
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" syslogd.service loaded active running System Logging Daemon\r\n"
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" networking.service loaded active running IPv4 Network Interface Manager\r\n"
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" httpd.service loaded active running Embedded Micro HTTP Web Server\r\n"
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" sshd.service loaded active running OpenSSH Remote Secure Shell Server\r\n"
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" crond.service loaded active running Periodic Command Scheduler Daemon\r\n"
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" firewall.service loaded active running NetFilter Stateful Packet Inspection\r\nsub-os:/> ");
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return (int)strlen(out_resp);
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}
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snprintf(out_resp, max_resp_len, "[remote]: %s: command executed\r\nsub-os:/> ", clean_cmd);
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return (int)strlen(out_resp);
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}
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Executable
+69
@@ -0,0 +1,69 @@
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#!/usr/bin/env bash
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# ==============================================================================
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# SUB-OS Global Remote Access & Internet Tunnel Launcher
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# Enables SSH & Web access from ANY network (different Wi-Fi, 4G/5G, Internet)
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# ==============================================================================
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set -e
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echo "================================================================="
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echo " SUB-OS Global Internet Remote Access & Tunnel Manager "
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echo "================================================================="
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echo ""
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echo "Select how you want to expose SUB-OS SSH to the global Internet:"
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echo ""
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echo " [1] Pinggy Instant SSH Tunnel (Zero setup, works anywhere worldwide)"
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echo " [2] Serveo SSH Reverse Proxy (Zero setup, global public domain)"
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echo " [3] Cloudflare Zero-Trust Tunnel (cloudflared)"
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echo " [4] Ngrok TCP Forwarder"
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echo " [5] Local Subnet Only (Same Wi-Fi / LAN IP)"
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echo ""
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read -p "Choose option [1-5] (default: 1): " OPTION
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OPTION=${OPTION:-1}
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case "$OPTION" in
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1)
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echo ""
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echo "🚀 Starting Pinggy Public Tunnel for SUB-OS SSH (Port 2222)..."
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echo "👉 Once connected, use the public command shown below on your Kali terminal!"
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echo ""
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ssh -p 443 -R0:localhost:2222 -o StrictHostKeyChecking=no a.pinggy.io
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;;
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2)
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echo ""
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echo "🚀 Starting Serveo Reverse Tunnel for SUB-OS SSH (Port 2222)..."
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echo "👉 Once connected, use the command displayed on screen from any network!"
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echo ""
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ssh -R 0:localhost:2222 serveo.net
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;;
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3)
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echo ""
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echo "🚀 Launching Cloudflare Tunnel for SUB-OS..."
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if ! command -v cloudflared &> /dev/null; then
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echo "Error: cloudflared is not installed. Install via: 'brew install cloudflared' or 'apt install cloudflared'"
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exit 1
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fi
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cloudflared tunnel --url tcp://localhost:2222
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;;
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4)
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echo ""
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echo "🚀 Launching Ngrok TCP Tunnel for Port 2222..."
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if ! command -v ngrok &> /dev/null; then
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echo "Error: ngrok is not installed. Download from https://ngrok.com"
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exit 1
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fi
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ngrok tcp 2222
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;;
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5)
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HOST_IP=$(hostname -I 2>/dev/null | awk '{print $1}' || ipconfig getifaddr en0 2>/dev/null || echo "127.0.0.1")
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echo ""
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echo "📍 Local Wi-Fi / LAN Mode:"
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echo "👉 On Kali Linux (same Wi-Fi), run:"
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echo " ssh -p 2222 root@$HOST_IP"
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echo " curl http://$HOST_IP:8080/api/status"
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;;
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*)
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echo "Invalid option. Exiting."
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exit 1
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;;
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esac
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