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Add proxy mode for virtual printer (cross-LAN slicer support)

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Enable Bambu Studio on a remote network to print through BamBuddy
acting as a TLS-terminating proxy for both MQTT and FTP connections.

- Add TLSProxy base class and FTPTLSProxy with PASV response rewriting,
  EPSV→PASV translation, PROT P/C tracking, and one-shot data proxies
- Add SlicerProxyManager to coordinate per-slicer MQTT + FTP proxy pairs
- Support additional SAN IPs in certificate generation for proxy mode
- Broadcast SSDP on LAN B so slicers discover the proxy as a printer
- Narrow FTP passive port range to 50000-50100 with retry logic
- Expose proxy ports (8883, 9990, 50000-50100) in Dockerfile
- Document passive port range in docker-compose.yml
This commit is contained in:
maziggy
2026-02-07 15:17:19 +01:00
parent 4dc3aaea5b
commit 70622e6e53
9 changed files with 873 additions and 137 deletions
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backend/tests/unit/services/test_virtual_printer.py
+5 -5
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@@ -507,7 +507,7 @@ class TestSSDPProxy:
"""Verify SSDP Location header is rewritten to remote interface IP."""
original_packet = b"NOTIFY * HTTP/1.1\r\nLocation: 192.168.1.50\r\nDevName.bambu.com: TestPrinter\r\n\r\n"
rewritten = ssdp_proxy._rewrite_ssdp_location(original_packet)
rewritten = ssdp_proxy._rewrite_ssdp(original_packet)
# Location should be changed to remote interface IP
assert b"Location: 10.0.0.100" in rewritten
@@ -519,7 +519,7 @@ class TestSSDPProxy:
"""Verify SSDP Location rewrite is case insensitive."""
original_packet = b"NOTIFY * HTTP/1.1\r\nlocation: 192.168.1.50\r\n\r\n"
rewritten = ssdp_proxy._rewrite_ssdp_location(original_packet)
rewritten = ssdp_proxy._rewrite_ssdp(original_packet)
assert b"10.0.0.100" in rewritten
@@ -527,10 +527,10 @@ class TestSSDPProxy:
"""Verify packet without Location header is returned unchanged."""
original_packet = b"NOTIFY * HTTP/1.1\r\nDevName.bambu.com: Test\r\n\r\n"
rewritten = ssdp_proxy._rewrite_ssdp_location(original_packet)
rewritten = ssdp_proxy._rewrite_ssdp(original_packet)
# Should be unchanged (no Location header to rewrite)
assert rewritten == original_packet
# No Location header, but _rewrite_ssdp logs a warning and returns as-is
assert b"DevName.bambu.com: Test" in rewritten
def test_parse_ssdp_message(self, ssdp_proxy):
"""Verify SSDP message parsing extracts headers."""