DUN fails to do fast data

Bluez-devel Brad Midgley 2 participants 2 messages Feb 24, 2006 Bluetooth drivers

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Brad Midgley

author

2006-02-24 05:14 UTC #0 lore raw

I have been using dialup networking over bluetooth for some time. The carrier was providing cdma/1xrtt which runs at about 130kbps. When they upgraded to ev-do (should deliver at least 200kbps), I found that the link would drop if I was trying to max out the connection.

Now I've had a chance to test this on two different phones on two different carriers (samsung i730 on verizon and xv6700 on sprint) and both show this problem with maxing the connection. Actually, the i730 will drop the connection but the xv6700 is more likely to lock up the phone. Is something getting out of sync?

/etc/ppp/providers/default:

noauth
connect "/usr/sbin/chat -v -f /etc/chatscripts/verizon" /dev/rfcomm5
460800
defaultroute
noipdefault
user "801......."
ipparam verizon
usepeerdns
crtscts

Here's a part of the dump when doing a large download. In this case, the xf6700 locked up solid at the end of the dump.

Any ideas?

    L2CAP(d): cid 0x0040 len 672 [psm 0]
      0000: 21 ef 36 05 8b 24 59 9f  84 38 4c 0c 0e 04 e7 8d
!.6..$Y..8L.....
      0010: 10 b2 0f e1 e7 3c 84 8b  8a 3f 1d 47 68 11 c4 5a
.....<...?.Gh..Z
      0020: 3e 99 10 05 29 b4 91 fd  57 05 cd 65 d1 2a 83 a7

Quoted 1 line

...)...W..e.*..

      0030: 65 c3 2e ce 85 43 17 23  e8 89 07 93 e4 d1 ca f9
e....C.#........
      0040: 4d 3b ec 34 af 98 98 c6  17 79 7c 59 06 53 f4 92
M;.4.....y|Y.S..
      0050: 25 6d fa ad d7 7c c4 b1  0b e1 dc c3 79 8e fe 13
%m...|......y...
      0060: 05 40 77 cb bf 54 f8 36  13 7b fd b9 17 0e 92 35
[email protected].{.....5
      0070: 32 21 64 44 7c ba 8d 17  bc 43 74 92 e1 5c a9 85
2!dD|....Ct..\..
      0080: 95 35 f9 35 8d d6 5f 34  40 cd 31 cd e7 35 6a 73
[email protected]
      0090: 5c f0 88 a3 4f d7 9b d3  9e 67 49 fe b5 18 96 85
\...O....gI.....
      00a0: b3 1a 8f 1b 56 f0 98 5d  21 0d 95 54 d4 ac ed c3
....V..]!..T....
      00b0: 9d fa 5b 48 a2 4c ac c4  22 2c 37 b3 11 1b c4 74
..[H.L..",7....t
      00c0: 8d b5 55 8c 50 bd a0 05  b4 ae fb ef ac 12 94 45
..U.P..........E
      00d0: da 74 18 6d 9a 01 4a 47  49 0d 30 d5 00 14 75 a3
.t.m..JGI.0...u.
      00e0: 9d bb 04 69 d2 f1 96 f2  97 96 27 97 bd fe 52 07
...i......'...R.
      00f0: 11 3a 52 a6 7d 5e 3b 3f  52 f1 f0 f4 f8 ff 7e 7e
.:R.}^;?R.....~~
      0100: 21 45 00 05 dc 27 20 40  00 3a 06 a1 c0 98 02 d2  !E...'
@.:......
      0110: 41 44 1b c3 dc 00 50 11  6f 96 f9 d0 17 b4 73 47
AD....P.o.....sG
      0120: f9 80 10 82 18 0d 33 00  00 01 01 08 0a 24 fb fc
......3......$..
      0130: 9b 25 d1 26 f4 2c 28 8a  97 ad 54 48 13 b6 3b da
.%.&.,(...TH..;.
      0140: 8a 6f 31 d8 94 a2 96 32  9b 2e 34 e6 35 f7 f8 6b
.o1....2..4.5..k
      0150: 59 e0 b6 20 14 70 0c 8d  23 b8 95 10 cf 5d 68 3a  Y..
.p..#....]h:
      0160: 09 78 02 7b 59 c7 22 47  25 ed e6 a0 8c 44 2a b9
.x.{Y."G%....D*.
      0170: ec 7a aa 82 a6 0c eb eb  6f c8 b3 cd e9 35 eb 0a
.z......o....5..
      0180: a1 a0 88 cb 44 dc ca 57  2e 00 93 c7 0c 0f f6 4b
....D..W.......K
      0190: 09 0b 0e 6f 75 43 d3 50  c7 3c 1b 16 1b 3f a4 a6
...ouC.P.<...?..
      01a0: 78 a4 15 94 47 35 ee 7a  24 cd 2d 73 6b 96 7d 5e
x...G5.z$.-sk.}^
      01b0: 5c f8 32 09 9b a5 d6 82  52 7d 5d 89 3e ba 10 0e
\.2.....R}].>...
      01c0: 6a 69 da 00 e0 fe 37 3a  d4 ed 1e 82 27 2f b4 eb
ji....7:....'/..
      01d0: 90 a5 9b e6 f2 cf 91 78  3f 01 35 ea 61 b5 0c 38
.......x?.5.a..8
      01e0: d4 eb 21 c6 2d 45 4f 5a  e6 df 0f 90 5c 19 a1 75
..!.-EOZ....\..u
      01f0: b6 11 63 b5 23 f6 6b 38  97 b6 fa ce 85 8d cb c4
..c.#.k8........
      0200: 52 65 1e 8c d9 96 19 1e  78 f0 b9 d2 61 a6 28 be
Re......x...a.(.
      0210: 2d 9d 26 06 92 f1 c9 e4  c2 fa 2f b8 0f c4 87 bf
-.&......./.....
      0220: ae d3 55 7b 3c 5f 7d 5e  4d 60 78 7c db d4 27 22
..U{<_}^M`x|..'"
      0230: e2 c3 ad ad e1 87 41 10  1c 04 62 20 68 7b e6 6f
......A...b h{.o
      0240: 9e 22 53 a6 f3 0a b3 e9  a9 0c f5 1a 9e 6d 99 88
."S..........m..
      0250: 6d cd 4f 42 af 34 e2 6e  48 e0 13 a1 ae a8 5e ce
m.OB.4.nH.....^.
      0260: b6 09 92 0b a7 ec fa 8c  6d 0f bf c9 ed f9 04 86
........m.......
      0270: d6 cf 50 51 32 51 07 0e  ac c0 ce c5 a5 a6 61 d7
..PQ2Q........a.
      0280: d8 39 d2 32 87 ad 39 50  f3 f5 e1 b2 ea ec ed 9b
.9.2..9P........
      0290: 66 16 cf b6 0d 42 f4 a1  ec 88 89 ab 8b 16 62 80
f....B........b.
< ACL data: handle 42 flags 0x02 dlen 64
    L2CAP(d): cid 0x0042 len 60 [psm 0]
      0000: 23 ef 71 21 45 00 00 34  2e bf 40 00 40 06 99 c9
#.q!E..4..@.@...
      0010: 44 1b c3 dc 98 02 d2 41  11 6f 00 50 b4 73 47 f9
D......A.o.P.sG.
      0020: 96 f9 d0 17 80 10 54 50  c3 fc 00 00 01 01 08 0a
......TP........
      0030: 25 d1 2f 97 24 fb fc 93  69 ac 7e 5a              %./.$...i.~Z

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Brad

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Marcel Holtmann

maintainer

2006-02-24 16:58 UTC #1 lore raw

Hi Brad,

Quoted 10 lines

I have been using dialup networking over bluetooth for some time. The carrier was providing cdma/1xrtt which runs at about 130kbps. When they upgraded to ev-do (should deliver at least 200kbps), I found that the link would drop if I was trying to max out the connection.
Now I've had a chance to test this on two different phones on two different carriers (samsung i730 on verizon and xv6700 on sprint) and both show this problem with maxing the connection. Actually, the i730 will drop the connection but the xv6700 is more likely to lock up the phone. Is something getting out of sync?

maybe both phones are at fault. The RFCOMM flow control is actually implemented that it supports LAN access profile which is PPP over RFCOMM as fast as possible. The latest version of hcidump has a integrated PPP parser (only partial useful) and a pppdump export facility. Use this to track down the reason for the link drop.

Regards

Marcel