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Unknown PTCP Packet Type 0x0a Received #15

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krabiswabbie opened this issue Feb 12, 2025 · 0 comments
Open

Unknown PTCP Packet Type 0x0a Received #15

krabiswabbie opened this issue Feb 12, 2025 · 0 comments

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@krabiswabbie
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krabiswabbie commented Feb 12, 2025 •
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Hi,

While experimenting with a minified relay-only model, I encounter an unexpected PTCP packet type during the realm binding process.

After sending a Binding Port packet, the system receives a PTCP packet identified as type 0x0a, which the current implementation doesn't recognize. This occurs after the initial PTCP session (SYN/SYN-ACK) is successfully established and during the realm binding attempt.

Any insights into packet type 0x0a and its role in the PTCP relay protocol would be greatly appreciated.

Here's a snippet from the debug logs showing the received packet:

time=2025-02-12T19:12:54.516+03:00 level=DEBUG msg="Attempting to fetch relay address from www.easy4ipcloud.com:8800"
time=2025-02-12T19:12:54.727+03:00 level=DEBUG msg="Sending request" req="DHGET /online/relay HTTP/1.1\r\nCSeq: 1\r\nAuthorization: WSSE profile=\"UsernameToken\"\r\nX-WSSE: UsernameToken Username=\"cba1b29e32cb17aa46b8ff9e73c7f40b\", PasswordDigest=\"RJk2jM0LWTrQxx6FnKgLnCNJAOs=\", Nonce=\"1208787743\", Created=\"2025-02-12T16:12:54Z\"\r\n\r\n"
time=2025-02-12T19:12:54.923+03:00 level=DEBUG msg="Received response" resp="HTTP/1.1 200 OK\r\nDate: 2025-02-12T16:12:54Z\r\nCSeq: 1\r\nContent-Type: \r\nContent-Length: 89\r\n\r\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><body><Address>150.230.41.180:8900</Address></body>"
time=2025-02-12T19:12:54.923+03:00 level=DEBUG msg="Relay address is 150.230.41.180:8900"
time=2025-02-12T19:12:54.923+03:00 level=DEBUG msg="Attempting to setup initial relay connection"
time=2025-02-12T19:12:54.923+03:00 level=DEBUG msg="Sending request" req="DHGET /relay/agent HTTP/1.1\r\nCSeq: 2\r\nAuthorization: WSSE profile=\"UsernameToken\"\r\nX-WSSE: UsernameToken Username=\"cba1b29e32cb17aa46b8ff9e73c7f40b\", PasswordDigest=\"5KuIh0KBajMBp3lLe1abP8Pmh9k=\", Nonce=\"1310360986\", Created=\"2025-02-12T16:12:54Z\"\r\n\r\n"
time=2025-02-12T19:12:55.122+03:00 level=DEBUG msg="Received response" resp="HTTP/1.1 200 OK\r\nCSeq: 2\r\nContent-Type: \r\nContent-Length: 170\r\n\r\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><body><Agent>146.235.210.85:14042</Agent><Token>79E821C01ED5F4D17418805A9FD35A28-67d31a7402bd6b3febf071367f8c9211</Token></body>\r\n\r\n"
time=2025-02-12T19:12:55.122+03:00 level=DEBUG msg="Sending request" req="DHPOST /relay/start/79E821C01ED5F4D17418805A9FD35A28-67d31a7402bd6b3febf071367f8c9211 HTTP/1.1\r\nCSeq: 3\r\nAuthorization: WSSE profile=\"UsernameToken\"\r\nX-WSSE: UsernameToken Username=\"cba1b29e32cb17aa46b8ff9e73c7f40b\", PasswordDigest=\"CpLVWaQJ1dmkSqvNpJfCE9fzepk=\", Nonce=\"1475121588\", Created=\"2025-02-12T16:12:55Z\"\r\nContent-Type: \r\nContent-Length: 32\r\n\r\n<body><Client>:0</Client></body>"
time=2025-02-12T19:12:55.318+03:00 level=DEBUG msg="Received response" resp="HTTP/1.1 200 OK\r\nCSeq: 3\r\nContent-Type: \r\nContent-Length: 113\r\n\r\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><body><SID>67d31a7402bd6b3febf071367f8c9211</SID><Time>30</Time></body>\r\n\r\n"
time=2025-02-12T19:12:55.318+03:00 level=INFO msg="Relay initialized"
time=2025-02-12T19:12:55.318+03:00 level=DEBUG msg="Attempting to setup relay channel with the device"
time=2025-02-12T19:12:55.518+03:00 level=DEBUG msg="Sending request" req="DHPOST /device/AD01D76PAGF6D14/relay-channel HTTP/1.1\r\nCSeq: 4\r\nAuthorization: WSSE profile=\"UsernameToken\"\r\nX-WSSE: UsernameToken Username=\"cba1b29e32cb17aa46b8ff9e73c7f40b\", PasswordDigest=\"L1eGTdTNOBWPqGCR6D1szITnHhk=\", Nonce=\"488173548\", Created=\"2025-02-12T16:12:55Z\"\r\nContent-Type: \r\nContent-Length: 267\r\n\r\n<body><CreateDate>1739376775</CreateDate><DevAuth>7n2q8s+rN15Vw2ePIaTc6Fc71VXpNrfV8SDa5G4e6v4=</DevAuth><Nonce>1739376775518089298</Nonce><RandSalt>5daf91fc5cfc1be8e081cfb08f792726</RandSalt><UserName>admin</UserName><agentAddr>146.235.210.85:14042</agentAddr></body>"
time=2025-02-12T19:12:55.953+03:00 level=DEBUG msg="Received response" resp="HTTP/1.1 200 Server Nat Info!\r\nCSeq: 4\r\nContent-Type: \r\nContent-Length: 37\r\n\r\n<body><version>5.0.3</version></body>"
time=2025-02-12T19:12:55.954+03:00 level=INFO msg="Relay channel setup successful"
time=2025-02-12T19:12:55.954+03:00 level=INFO msg="RTSP tunnel started" local=127.0.0.1:1554 remote=554

time=2025-02-12T19:12:57.879+03:00 level=INFO msg="New RTSP connection" addr=127.0.0.1:53346
time=2025-02-12T19:12:57.880+03:00 level=DEBUG msg="Attempting to establish PTCPPacket session with relay"
time=2025-02-12T19:12:57.880+03:00 level=DEBUG msg="Sending SYN packet" packet="{ sent: 0, recv: 0, pid: 0x0002ffff, lmid: 0x00000000, rmid: 0x00000000, type: SYN }" addr=146.235.210.85:14042
time=2025-02-12T19:12:57.880+03:00 level=DEBUG msg="Start listening for incoming messages"
time=2025-02-12T19:12:58.259+03:00 level=DEBUG msg="Received bytes" size=28 data=0x5054435000000000000000040002ffff0245f9110000000000030100 addr=146.235.210.85:14042
time=2025-02-12T19:12:58.259+03:00 level=DEBUG msg="Parsed packet" packet="{ sent: 0, recv: 4, pid: 0x0002ffff, lmid: 0x0245f911, rmid: 0x00000000, type: SYN }"
time=2025-02-12T19:12:58.259+03:00 level=INFO msg="PTCP session established"
time=2025-02-12T19:12:58.259+03:00 level=DEBUG msg="Starting realm binding" realm=0xbf4adfac
time=2025-02-12T19:12:58.259+03:00 level=DEBUG msg="Sending packet" packet="{ sent: 28, recv: 28, pid: 0x0000ffff, lmid: 0x00000001, rmid: 0x0245f911, type: Binding Port }" addr=146.235.210.85:14042
time=2025-02-12T19:12:58.259+03:00 level=DEBUG msg="Packet raw data" data=505443500000001c0000001c0000ffff000000010245f91111000000bf4adfac000000000000022a7f000001
time=2025-02-12T19:12:58.638+03:00 level=DEBUG msg="Received bytes" size=35 data=0x5054435000000004000000040100ffff0245fa8c000000000a00080400000000001700 addr=146.235.210.85:14042
time=2025-02-12T19:12:58.638+03:00 level=DEBUG msg="Parsed packet" packet="{ sent: 4, recv: 4, pid: 0x0100ffff, lmid: 0x0245fa8c, rmid: 0x00000000, type: Unknown(0x0a): 0x00080400000000001700 }"
time=2025-02-12T19:12:58.639+03:00 level=DEBUG msg="Sending EMPTY packet" packet="{ sent: 72, recv: 63, pid: 0x0000fffe, lmid: 0x00000002, rmid: 0x0245fa8c, type: Empty }" addr=146.235.210.85:14042
time=2025-02-12T19:12:59.017+03:00 level=DEBUG msg="Received bytes" size=35 data=0x5054435000000004000000040100ffff0245fc08000000000a00080400000000001700 addr=146.235.210.85:14042
time=2025-02-12T19:12:59.017+03:00 level=DEBUG msg="Parsed packet" packet="{ sent: 4, recv: 4, pid: 0x0100ffff, lmid: 0x0245fc08, rmid: 0x00000000, type: Unknown(0x0a): 0x00080400000000001700 }"
time=2025-02-12T19:12:59.017+03:00 level=DEBUG msg="Sending EMPTY packet" packet="{ sent: 96, recv: 98, pid: 0x0000fffe, lmid: 0x00000003, rmid: 0x0245fc08, type: Empty }" addr=146.235.210.85:14042
time=2025-02-12T19:12:59.397+03:00 level=DEBUG msg="Received bytes" size=35 data=0x5054435000000004000000040100ffff0245fd83000000000a00080400000000001700 addr=146.235.210.85:14042
time=2025-02-12T19:12:59.397+03:00 level=DEBUG msg="Parsed packet" packet="{ sent: 4, recv: 4, pid: 0x0100ffff, lmid: 0x0245fd83, rmid: 0x00000000, type: Unknown(0x0a): 0x00080400000000001700 }"
time=2025-02-12T19:12:59.397+03:00 level=DEBUG msg="Sending EMPTY packet" packet="{ sent: 120, recv: 133, pid: 0x0000fffe, lmid: 0x00000004, rmid: 0x0245fd83, type: Empty }" addr=146.235.210.85:14042

Thank you for your help!
Best regards
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