Multiple L2CAP channels on iOS











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I'm trying to open two L2CAP channels between iPhone and app running on MacOS.



MacOS app published two channels: PSM=193 and PSM=194.



I open those channels on iOS app:



peripheral.openL2CAPChannel(CBL2CAPPSM(193))
peripheral.openL2CAPChannel(CBL2CAPPSM(194))


And then I get successful delegate callbacks:



public func peripheral(_ peripheral: CBPeripheral,
didOpen channel: CBL2CAPChannel?,
error: Error?) {

print("Opened channel PSM is: (channel.psm)")

// Keep strong reference to opened channel
openedChannels.append(channel)
}


What's interesting though is the output...:



Opened channel PSM is: 193 
Opened channel PSM is: 193 // !?!


Delegate callback is called with different channel instance but with the same PSM.
On the MacOS app, I do get callback that channel 194 was opened though. However, when I write some data to the 194 channel, it's actually send to the first 193 channel that I opened.
Am I doing something wrong or is it a CoreBluetooth bug?










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    up vote
    0
    down vote

    favorite












    I'm trying to open two L2CAP channels between iPhone and app running on MacOS.



    MacOS app published two channels: PSM=193 and PSM=194.



    I open those channels on iOS app:



    peripheral.openL2CAPChannel(CBL2CAPPSM(193))
    peripheral.openL2CAPChannel(CBL2CAPPSM(194))


    And then I get successful delegate callbacks:



    public func peripheral(_ peripheral: CBPeripheral,
    didOpen channel: CBL2CAPChannel?,
    error: Error?) {

    print("Opened channel PSM is: (channel.psm)")

    // Keep strong reference to opened channel
    openedChannels.append(channel)
    }


    What's interesting though is the output...:



    Opened channel PSM is: 193 
    Opened channel PSM is: 193 // !?!


    Delegate callback is called with different channel instance but with the same PSM.
    On the MacOS app, I do get callback that channel 194 was opened though. However, when I write some data to the 194 channel, it's actually send to the first 193 channel that I opened.
    Am I doing something wrong or is it a CoreBluetooth bug?










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm trying to open two L2CAP channels between iPhone and app running on MacOS.



      MacOS app published two channels: PSM=193 and PSM=194.



      I open those channels on iOS app:



      peripheral.openL2CAPChannel(CBL2CAPPSM(193))
      peripheral.openL2CAPChannel(CBL2CAPPSM(194))


      And then I get successful delegate callbacks:



      public func peripheral(_ peripheral: CBPeripheral,
      didOpen channel: CBL2CAPChannel?,
      error: Error?) {

      print("Opened channel PSM is: (channel.psm)")

      // Keep strong reference to opened channel
      openedChannels.append(channel)
      }


      What's interesting though is the output...:



      Opened channel PSM is: 193 
      Opened channel PSM is: 193 // !?!


      Delegate callback is called with different channel instance but with the same PSM.
      On the MacOS app, I do get callback that channel 194 was opened though. However, when I write some data to the 194 channel, it's actually send to the first 193 channel that I opened.
      Am I doing something wrong or is it a CoreBluetooth bug?










      share|improve this question













      I'm trying to open two L2CAP channels between iPhone and app running on MacOS.



      MacOS app published two channels: PSM=193 and PSM=194.



      I open those channels on iOS app:



      peripheral.openL2CAPChannel(CBL2CAPPSM(193))
      peripheral.openL2CAPChannel(CBL2CAPPSM(194))


      And then I get successful delegate callbacks:



      public func peripheral(_ peripheral: CBPeripheral,
      didOpen channel: CBL2CAPChannel?,
      error: Error?) {

      print("Opened channel PSM is: (channel.psm)")

      // Keep strong reference to opened channel
      openedChannels.append(channel)
      }


      What's interesting though is the output...:



      Opened channel PSM is: 193 
      Opened channel PSM is: 193 // !?!


      Delegate callback is called with different channel instance but with the same PSM.
      On the MacOS app, I do get callback that channel 194 was opened though. However, when I write some data to the 194 channel, it's actually send to the first 193 channel that I opened.
      Am I doing something wrong or is it a CoreBluetooth bug?







      ios core-bluetooth ios-bluetooth l2cap






      share|improve this question













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      asked 2 days ago









      msmialko

      225925




      225925





























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