[Bluez-users] rfcomm connect error Too many links(31)

[David Mackie <D.Mackie@ru.ac.za>]

Hi,

I am trying to write a program that forwards one rfcomm connection to
another connection, but each time I try make a 2nd connection out I get a
"Too many links(31)" error. Attached is my code but here is some simple
"psedo code" of it:

rcsocklisten = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
bind(rcsocklisten, (struct sockaddr *) &loc_addr, sizeof(loc_addr)
listen(rcsocklisten, 4)
rcsockin = accept(rcsocklisten, (struct sockaddr *)&rem_addr, &opt)
rcsockout = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
bind(rcsockout, (struct sockaddr *) &addr, sizeof(addr)
connect(rcsockout, (struct sockaddr *)&addr, sizeof(addr)
--ERROR here--

hcidump -V -x shows the following:

< HCI Command: Create Connection (0x01|0x0005) plen 13
    bdaddr 00:80:C8:26:FD:6D ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> HCI Event: Command Status (0x0f) plen 4
    Create Connection (0x01|0x0005) status 0x00 ncmd 1
> HCI Event: Connect Complete (0x03) plen 11
    status 0x09 handle 0 bdaddr 00:80:C8:26:FD:6D type ACL encrypt 0x00
    Error: Connection Limit Exceeded

The "Connection Limit Exceeded" is worry and confusing me as I have run
mutiple rfcomm connections through this chip before.

below are hciconfig -a on the 3 devices

[device rcloopback is run on]
hci0:   Type: USB
        BD Address: 00:0D:88:AC:DE:07 ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING
        RX bytes:244095 acl:1979 sco:0 events:11528 errors:0
        TX bytes:1472737 acl:11072 sco:0 commands:184 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'bent'
        Class: 0x3e0100
        Service Classes: Networking, Rendering, Capturing
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x1bb LMP Ver: 1.1 (0x1) LMP Subver: 0x1bb
        Manufacturer: Cambridge Silicon Radio (10)

[device connecting to rcloopback]
hci0:   Type: USB
        BD Address: 00:20:ED:09:59:57 ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:181657222 acl:868257 sco:0 events:533586 errors:0
        TX bytes:106682353 acl:645874 sco:0 commands:615 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'crooked'
        Class: 0x3e0100
        Service Classes: Networking, Rendering, Capturing
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x110 LMP Ver: 1.1 (0x1) LMP Subver: 0x110
        Manufacturer: Cambridge Silicon Radio (10)

[device rcloopback connects too]
hci0:   Type: USB
        BD Address: 00:80:C8:26:FD:6D ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING
        RX bytes:394 acl:0 sco:0 events:18 errors:0
        TX bytes:319 acl:0 sco:0 commands:17 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'ubuntu-0'
        Class: 0x3e0100
        Service Classes: Networking, Rendering, Capturing
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x1bb LMP Ver: 1.1 (0x1) LMP Subver: 0x1bb
        Manufacturer: Cambridge Silicon Radio (10)

Any help would be very much appreciated as I am hitting a brick wall...

-- 
 David Mackie


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