[ENet-discuss] Unable to establish connection despite UDP packets flowing fine back and forth

[Martin Man]

Hi guys,

I’m facing a strange issue today, one of my enet clients is unable to connect to a (otherwise perfectly working) enet server.

Since it seems to be perfectly reproducible for the moment I took a capture and I’m looking at the dump, but I am not familiar with the internals to understand what is happening… could you please help me out?

Looks like the client sends a connect, and server replies two connect verify packets, yet client does not signal this up and sends another connect, and server replies another connect verify, and this go on and on and on until the client connect attempt timeouts and enet signals this up … then I try after several seconds, and the same sequence happens…

Here is the full dump from Wireshark with hidden IP addresses and port numbers, I can send in the full capture if that helps but this is the essence, only the 0x82 and 0x83 being exchanged.

Could you please help?

thanks,
Martin

Client packet 1:

ENet
    Peer ID: 0x8fff
    Sent Time: 0xc321
    Command: 0x82
    Channel ID: 0xff
    Reliable Sequence Number: 0x0001
    Connect: 8fffc32182ff00010000ffff000005780001000000000001...
    Outgoing Peer ID: 0x0000
    Incoming Session ID: 0xff
    Outgoing Session ID: 0xff
    MTU: 0x00000578
    Window Size: 0x00010000
    Channel Count: 0x00000001
    Incoming Bandwidth: 0x00000000
    Outgoing Bandwidth: 0x00000000
    Packet Throttle Interval: 0x00001388
    Packet Throttle Acceleration: 0x00000002
    Packet Throttle Deceleration: 0x00000002
    Connect ID: 0x7642aa94
    Data: 0x00000000
Server reply 1:

ENet
    Peer ID: 0x9000
    Sent Time: 0xc37c
    Command: 0x83
    Channel ID: 0xff
    Reliable Sequence Number: 0x0001
    Verify Connect: 9000c37c83ff000100c00101000005780001000000000001...
    Outgoing Peer ID: 0x00c0
    Incoming Session ID: 0x01
    Outgoing Session ID: 0x01
    MTU: 0x00000578
    Window Size: 0x00010000
    Channel Count: 0x00000001
    Incoming Bandwidth: 0x00000000
    Outgoing Bandwidth: 0x00000000
    Packet Throttle Interval: 0x00001388
    Packet Throttle Acceleration: 0x00000002
    Packet Throttle Deceleration: 0x00000002
    Connect ID: 0x7642aa94
Server reply 2:

ENet
    Peer ID: 0x9000
    Sent Time: 0xc570
    Command: 0x83
    Channel ID: 0xff
    Reliable Sequence Number: 0x0001
    Verify Connect: 9000c57083ff000100c00101000005780001000000000001...
    Outgoing Peer ID: 0x00c0
    Incoming Session ID: 0x01
    Outgoing Session ID: 0x01
    MTU: 0x00000578
    Window Size: 0x00010000
    Channel Count: 0x00000001
    Incoming Bandwidth: 0x00000000
    Outgoing Bandwidth: 0x00000000
    Packet Throttle Interval: 0x00001388
    Packet Throttle Acceleration: 0x00000002
    Packet Throttle Deceleration: 0x00000002
    Connect ID: 0x7642aa94
Client packet 2:

ENet
    Peer ID: 0x8fff
    Sent Time: 0xc709
    Command: 0x82
    Channel ID: 0xff
    Reliable Sequence Number: 0x0001
    Connect: 8fffc70982ff00010000ffff000005780001000000000001...
    Outgoing Peer ID: 0x0000
    Incoming Session ID: 0xff
    Outgoing Session ID: 0xff
    MTU: 0x00000578
    Window Size: 0x00010000
    Channel Count: 0x00000001
    Incoming Bandwidth: 0x00000000
    Outgoing Bandwidth: 0x00000000
    Packet Throttle Interval: 0x00001388
    Packet Throttle Acceleration: 0x00000002
    Packet Throttle Deceleration: 0x00000002
    Connect ID: 0x7642aa94
    Data: 0x00000000
Server reply 3:

ENet
    Peer ID: 0x9000
    Sent Time: 0xc958
    Command: 0x83
    Channel ID: 0xff
    Reliable Sequence Number: 0x0001
    Verify Connect: 9000c95883ff000100c00101000005780001000000000001...
    Outgoing Peer ID: 0x00c0
    Incoming Session ID: 0x01
    Outgoing Session ID: 0x01
    MTU: 0x00000578
    Window Size: 0x00010000
    Channel Count: 0x00000001
    Incoming Bandwidth: 0x00000000
    Outgoing Bandwidth: 0x00000000
    Packet Throttle Interval: 0x00001388
    Packet Throttle Acceleration: 0x00000002
    Packet Throttle Deceleration: 0x00000002
    Connect ID: 0x7642aa94

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