Date: Fri, 12 Oct 2012 00:32:47 +0200 From: Andreas Longwitz <longwitz@incore.de> To: maksim yevmenkin <maksim.yevmenkin@gmail.com>, freebsd-bluetooth@freebsd.org Subject: Re: btpand problem Message-ID: <5077490F.7010901@incore.de> In-Reply-To: <BDA3CA14-92C0-414E-9D55-E96EA7A73312@gmail.com> References: <507736A8.4050605@incore.de> <BDA3CA14-92C0-414E-9D55-E96EA7A73312@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Thanks for quick answer !
> Can you tell what l2cap Mtu was negotiated on both ends?
HCIDump - HCI packet analyzer ver 1.5
...
> ACL data: handle 0x002a flags 0x02 dlen 18
L2CAP(s): Config rsp: scid 0x004f flags 0x0000 result 0 clen 4
MTU 672
> ACL data: handle 0x002a flags 0x02 dlen 16
L2CAP(s): Config req: dcid 0x004f flags 0x0000 clen 4
MTU 256
....
< ACL data: handle 0x002a flags 0x02 dlen 16
L2CAP(s): Config req: dcid 0x0203 flags 0x0000 clen 4
MTU 1691
> HCI Event: Number of Completed Packets(0x13) plen 5
> ACL data: handle 0x002a flags 0x02 dlen 18
L2CAP(s): Config rsp: scid 0x0050 flags 0x0000 result 0 clen 4
MTU 1691
> ACL data: handle 0x002a flags 0x02 dlen 16
L2CAP(s): Config req: dcid 0x0050 flags 0x0000 clen 4
MTU 1691
....
My panserver is an iPhone 4S in hotspot mode.
>>
>> I have the problem described in this list in May 2009 (btpand example) with FreeBSD 8.3.
>>
>> ping -s 635 panserver --> ICMP 677 --> nw=672 in bnep_send(), writev syscall is ok with iov[0].iov_len=9 and iov[1].iov_len=663.
>>
>> ping -s 636 panserver --> ICMP 678 --> nw=-1, errno=40 (EMSGSIZE) is not ok with iov[0].iov_len=9 and iov[1].iov_len=664.
>>
>> In the error case the trace written by hcidump is empty (no suprise).
>> My tap interface has mtu=1500< 1691 (checked in bnep_send).
>>
Andreas Longwitz
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5077490F.7010901>