I've bought beaglebone black last day and tried to connect with it using USB. As i have read it comes with preinstalled Linux Distro which runs at 192.168.7.2 and we can access it using ssh. But i'm not able to connect. Using start.html provided with device, i have run the script (i'm using Linux not window) for driver installation which actually adds some udev rules. I found out that product id and vendor id provided in script isn't matching with that of device (i checked using lsusb). i'm attaching lsusb output of my device. You can find the online script for linux (driver installation) at http://beagleboard.org/static/Drivers/Linux/FTDI/mkudevrule.sh. Please let me know how can i connect with my device
========================lsusb=========================
Bus 002 Device 013: ID 1d6b:0104 Linux Foundation Multifunction Composite Gadget
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x1d6b Linux Foundation
idProduct 0x0104 Multifunction Composite Gadget
bcdDevice 3.08
iManufacturer 2 Circuitco
iProduct 3 BeagleBoneBlack
iSerial 4 6A-0414BBBK1966
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 164
bNumInterfaces 5
bConfigurationValue 1
iConfiguration 5 Multifunction with RNDIS
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 6 Ethernet Networking
bFunctionProtocol 0
iFunction 9 RNDIS
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?)
iInterface 7 RNDIS Communications Control
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
CDC ACM:
bmCapabilities 0x00
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 9
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 8 RNDIS Ethernet Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 12 CDC Serial
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 10 CDC Abstract Control Model (ACM)
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 3
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 2
bSlaveInterface 3
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 11 CDC ACM Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 1 Mass Storage
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Its simple just open your web browser chrome or mozilla fire fox and enter the ip in the title bar. Thats it you will get onto it. And comming to ssh if you specify the command you entered i can provide you the resolution.
I have the same issue. Making an auto ethernet connection to eth1 will make it possible to connect most of the times (sometimes you have to disconnect and connect several times!), but the best way is to use screen command.
sudo screen /dev/ttyACM0 115200
(it can be ttyACM* or ttyUSB*, you have to check).
You can login and connect this way. Not sure if it solves your problem though. Let me know.
Actually you dont have to connect to ethernet. You can use ethernet over usb by connecting the mini usb to your system. Linux usually dont require any drivers to be installed..
After you connect just open your browser and go on 192.168.7.2(default)
Sometimes you have to hold the S2 button(closest to the memory card slot) before you plug the usb cable. Also remove ethernet connection.
Related
We have bought a CAN Connect module for our Revpi Connect, and set it up as can been seen in this thread on the Kunbus forum. As far as we understand this will provide the proper termination.
We have also followed this guide provided by Revolution PI.
When checking that the drivers for the CAN module is properly loaded, everything looks fine:
$ dmesg | grep can
[ 4.616900] hi3110 spi0.0 can0: 3110 successfully initialized.
[ 107.049422] IPv6: ADDRCONF(NETDEV_UP): can0: link is not ready
[ 107.049463] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready
Checking ip statistics gives this result:
$ ip -det -statistics link show can0
5: can0: mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10
link/can promiscuity 0
can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0
bitrate 50000 sample-point 0.875
tq 1250 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
hi3110: tseg1 2..16 tseg2 2..8 sjw 1..4 brp 1..64 brp-inc 1
clock 16000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
RX: bytes packets errors dropped overrun mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
However, when we turn on candump and send a message using cansend, candump does not show any traffic.
If we check dmesg for CAN again, we get this result:
$ dmesg | grep can
[ 4.616900] hi3110 spi0.0 can0: 3110 successfully initialized.
[ 107.049422] IPv6: ADDRCONF(NETDEV_UP): can0: link is not ready
[ 107.049463] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready
[ 292.285353] can: controller area network core (rev 20170425 abi 9)
[ 292.297811] can: raw protocol (rev 20170425)
And if we check ip -statistics again, we can see that the state of the connection has gone into ERROR-PASSIVE:
$ ip -det -statistics link show can0
5: can0: mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10
link/can promiscuity 0
can state ERROR-PASSIVE (berr-counter tx 128 rx 0) restart-ms 0
bitrate 50000 sample-point 0.875
tq 1250 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
hi3110: tseg1 2..16 tseg2 2..8 sjw 1..4 brp 1..64 brp-inc 1
clock 16000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 1 1 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
RX: bytes packets errors dropped overrun mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
We are trying to communicate with a computer with and Ixxat USB2CAN v2, at 50kbps, with both highspeed and FT settings, but nothing seems to work. Resetting the connection, seems to put it back into ERROR-ACTIVE state.
When trying to communicate with mentioned computer, using another computer with Socketcan and another Ixxat USB2CAN v2 device, everything works fine.
I should perhaps also mention that if we turn loopback on, we can see the messages we are sending.
We are struggling to understand whether this a hardware or software error. Is our termination in order? Are there any magical settings in SocketCAN we have overlooked? Where should we start debugging this issue?
Any help would be greatly appreciated.
As it turns out, the schematic printed directly on the device is wrong.The schematic on their website is correct.
Hopefully this can help someone else avoid pulling their hair out in the future.
Why there are different data rates in each WLAN protocol.
Ex: 802.11 supports 1 and 2 Mbps,
802.11a can support 6, 9, 12, 18, 24, 36, 48, 54
802.11b can support 1, 2, 5.5, 11
etc..
802.11 and 802.11b:
Each data bits is converted into multiple bits of information for protection against errors due to noise or interference. Each of the new coded bits is called a chip. The different data rates has different chipping methods.
For example:
1 and 2 Mbps using the Barker code.
5.5 and 11 Mbps using Complementary Code Keying (CCK)
Both run at 11 Mchips/s.
Barker code has 11 chip code per symbol, CCK has 8 chip code per symbol =>
Symbol rate for Barker code 11000000/11 = 1 Msps, for CCK 1.375 Msps.
For Barker code:
DBPSK can modulate 1 bit of data => 1 bit * 1 Msps = 1 Mbps
DQPSK can modulate data bits in pairs => 2 bits * 1Msps = 2 Mbps
For CCK:
4 bits * 1.375 Msps = 5.5 Mbps
8 bits * 1.375 Msps = 11 Mbps
802.11g(802.11a):
This standart use OFDM modulation scheme. Look at modulation types:
BPSK (1 bit per symbol) => max rate is 12Mbps
QPSK (2 bits per symbol) => max rate is 24 Mbps
16-QAM (4 bits per symbol) => max rate is 48 Mbps
64-QAM (6 bits per symbol) => max rate is 72 Mbps
This types use code rate for error correction:
BPSK 1/2 => 6 Mbps
BPSK 3/4 => 9 Mbps
QPSK 1/2 => 12 Mbps
and so on.
Informix 11.70.TC5DE,
Windows Vista with Dual Core Processor, 8GB RAM, 1TB HDD:
During the installation of this server, I specified it was going to be used for a data warehousing application. These are the onconfig parameters the install script generated.
Can any of these parameters be changed to maximize the performance of the server?
#(onconfig.ol_informix1170) - for data warehousing app.
ROOTNAME rootdbs
ROOTPATH C:\PROGRA~1\IBM\Informix\11.70\OL_INF~2\dbspaces\rootdbs.000
ROOTOFFSET 0
ROOTSIZE 312992
MIRROR 0
MIRRORPATH
MIRROROFFSET 0
PHYSFILE 49152
PLOG_OVERFLOW_PATH
PHYSBUFF 512
LOGFILES 6
LOGSIZE 10000
DYNAMIC_LOGS 2
LOGBUFF 256
LTXHWM 70
LTXEHWM 80
MSGPATH C:\PROGRA~1\IBM\Informix\11.70\ol_informix1170_1.log
CONSOLE C:\PROGRA~1\IBM\Informix\11.70\ol_informix1170_1.con
TBLTBLFIRST 0
TBLTBLNEXT 0
TBLSPACE_STATS 1
DBSPACETEMP tempdbs
SBSPACETEMP
SBSPACENAME sbspace
SYSSBSPACENAME
ONDBSPACEDOWN 2
SERVERNUM 6
DBSERVERNAME ol_informix1170_1
DBSERVERALIASES dr_informix1170_1
NETTYPE olsoctcp,1,150,NET
LISTEN_TIMEOUT 60
MAX_INCOMPLETE_CONNECTIONS 1024
FASTPOLL 1
NS_CACHE host=900,service=900,user=900,group=900
MULTIPROCESSOR 0
VPCLASS cpu,num=1,noage
VP_MEMORY_CACHE_KB 0
SINGLE_CPU_VP 1
#VPCLASS aio,num=1
CLEANERS 2
AUTO_AIOVPS 1
DIRECT_IO 0
LOCKS 2000
DEF_TABLE_LOCKMODE page
RESIDENT 0
SHMBASE 0xc000000L
SHMVIRTSIZE 209920
SHMADD 6560
EXTSHMADD 8192
SHMTOTAL 0
SHMVIRT_ALLOCSEG 0,3
#SHMNOACCESS 0x70000000-0x7FFFFFFF
CKPTINTVL 300
AUTO_CKPTS 1
RTO_SERVER_RESTART 60
BLOCKTIMEOUT 3600
CONVERSION_GUARD 2
RESTORE_POINT_DIR $INFORMIXDIR\tmp
TXTIMEOUT 300
DEADLOCK_TIMEOUT 60
HETERO_COMMIT 0
TAPEDEV \\.\TAPE0
TAPEBLK 16
TAPESIZE 0
LTAPEDEV
LTAPEBLK 16
LTAPESIZE 0
BAR_ACT_LOG $INFORMIXDIR\tmp\bar_act.log
BAR_DEBUG_LOG $INFORMIXDIR\tmp\bar_dbug.log
BAR_DEBUG 0
BAR_MAX_BACKUP 0
BAR_RETRY 1
BAR_NB_XPORT_COUNT 20
BAR_XFER_BUF_SIZE 15
RESTARTABLE_RESTORE ON
BAR_PROGRESS_FREQ 0
BAR_BSALIB_PATH
BACKUP_FILTER
RESTORE_FILTER
BAR_PERFORMANCE 0
BAR_CKPTSEC_TIMEOUT 15
ISM_DATA_POOL ISMData
ISM_LOG_POOL ISMLogs
DD_HASHSIZE 31
DD_HASHMAX 10
DS_HASHSIZE 31
DS_POOLSIZE 127
PC_HASHSIZE 31
PC_POOLSIZE 127
PRELOAD_DLL_FILE
STMT_CACHE 0
STMT_CACHE_HITS 0
STMT_CACHE_SIZE 512
STMT_CACHE_NOLIMIT 0
STMT_CACHE_NUMPOOL 1
USEOSTIME 0
STACKSIZE 64
ALLOW_NEWLINE 0
USELASTCOMMITTED NONE
FILLFACTOR 90
MAX_FILL_DATA_PAGES 0
BTSCANNER num=1,threshold=5000,rangesize=-1,alice=6,compression=default
ONLIDX_MAXMEM 188928
MAX_PDQPRIORITY 100
DS_MAX_QUERIES 1
DS_TOTAL_MEMORY 188928
DS_MAX_SCANS 1
DS_NONPDQ_QUERY_MEM 188928
DATASKIP
OPTCOMPIND 2
DIRECTIVES 1
EXT_DIRECTIVES 0
OPT_GOAL -1
IFX_FOLDVIEW 0
AUTO_REPREPARE 1
USTLOW_SAMPLE 0
RA_PAGES 64
RA_THRESHOLD 16
BATCHEDREAD_TABLE 1
BATCHEDREAD_INDEX 1
BATCHEDREAD_KEYONLY 0
EXPLAIN_STAT 1
#SQLTRACE level=low,ntraces=1000,size=2,mode=global
#DBCREATE_PERMISSION informix
#DB_LIBRARY_PATH
IFX_EXTEND_ROLE 1
SECURITY_LOCALCONNECTION
UNSECURE_ONSTAT
ADMIN_USER_MODE_WITH_DBSA
ADMIN_MODE_USERS
PLCY_POOLSIZE 127
PLCY_HASHSIZE 31
USRC_POOLSIZE 127
USRC_HASHSIZE 31
STAGEBLOB
OPCACHEMAX 0
SQL_LOGICAL_CHAR OFF
SEQ_CACHE_SIZE 10
ENCRYPT_HDR
ENCRYPT_SMX
ENCRYPT_CDR 0
ENCRYPT_CIPHERS
ENCRYPT_MAC
ENCRYPT_MACFILE
ENCRYPT_SWITCH
CDR_EVALTHREADS 1,2
CDR_DSLOCKWAIT 5
CDR_QUEUEMEM 4096
CDR_NIFCOMPRESS 0
CDR_SERIAL 0
CDR_DBSPACE
CDR_QHDR_DBSPACE
CDR_QDATA_SBSPACE
CDR_SUPPRESS_ATSRISWARN
CDR_DELAY_PURGE_DTC 0
CDR_LOG_LAG_ACTION ddrblock
CDR_LOG_STAGING_MAXSIZE 0
CDR_MAX_DYNAMIC_LOGS 0
DRAUTO 0
DRINTERVAL 30
DRTIMEOUT 30
HA_ALIAS
DRLOSTFOUND $INFORMIXDIR\etc\dr.lostfound
DRIDXAUTO 0
LOG_INDEX_BUILDS
SDS_ENABLE
SDS_TIMEOUT 20
SDS_TEMPDBS
SDS_PAGING
SDS_LOGCHECK 0
UPDATABLE_SECONDARY 0
FAILOVER_CALLBACK
FAILOVER_TX_TIMEOUT 0
TEMPTAB_NOLOG 0
DELAY_APPLY 0
STOP_APPLY 0
LOG_STAGING_DIR
RSS_FLOW_CONTROL 0
ENABLE_SNAPSHOT_COPY 0
SMX_COMPRESS 0
ON_RECVRY_THREADS 2
OFF_RECVRY_THREADS 5
DUMPDIR $INFORMIXDIR\tmp
DUMPSHMEM 1
DUMPGCORE 0
DUMPCORE 0
DUMPCNT 1
ALARMPROGRAM $INFORMIXDIR\etc\alarmprogram.bat
ALRM_ALL_EVENTS 0
#SYSALARMPROGRAM $INFORMIXDIR\etc\evidence.bat
STORAGE_FULL_ALARM 600,3
RAS_PLOG_SPEED 10982
RAS_LLOG_SPEED 0
EILSEQ_COMPAT_MODE 0
QSTATS 0
WSTATS 0
#VPCLASS MQ,noyield
MQSERVER
MQCHLLIB
MQCHLTAB
#VPCLASS jvp,num=1
#JVPJAVAHOME $INFORMIXDIR\extend\krakatoa\jre
#JVPHOME $INFORMIXDIR\extend\krakatoa
JVPPROPFILE $INFORMIXDIR\extend\krakatoa\.jvpprops
JVPLOGFILE $INFORMIXDIR\jvp.log
#JDKVERSION 1.5
#JVPJAVALIB \bin
#JVPJAVAVM jvm
#JVPARGS -verbose:jni
#JVPCLASSPATH $INFORMIXDIR\extend\krakatoa\krakatoa_g.jar;$INFORMIXDIR\extend\krakatoa\jdbc_g.jar
JVPARGS -Dcom.ibm.tools.attach.enable=no
JVPCLASSPATH $INFORMIXDIR\extend\krakatoa\krakatoa.jar;$INFORMIXDIR\extend\krakatoa\jdbc.jar
BUFFERPOOL default,buffers=10000,lrus=8,lru_min_dirty=50.00,lru_max_dirty=60.50
BUFFERPOOL size=4K,buffers=13108,lrus=16,lru_min_dirty=70.00,lru_max_dirty=80.00
AUTO_LRU_TUNING 1
USERMAPPING OFF
SP_AUTOEXPAND 1
SP_THRESHOLD 0
SP_WAITTIME 30
DEFAULTESCCHAR \
LOW_MEMORY_RESERVE 0
LOW_MEMORY_MGR 0
REMOTE_SERVER_CFG
REMOTE_USERS_CFG
S6_USE_REMOTE_SERVER_CFG 0
GSKIT_VERSION
NETTYPE drsoctcp,1,150,NET
If it is a multiprocessor machine, definitely consider turning on MULTIPROCESSOR by setting it to a non-zero value.
The ONCONFIG parameters of greatest interest to you for DSS are those related to Parallel Data Query, or PDQ. The block that commences with MAX_PDQPRIORITY. It is worth perusing the fine manual on these specifically, because the inter-relationship between them and some other parameters is too complex to go into here.
But in essence, DS_MAX_QUERIES is the maxumum number of parallel queries permitted at any time, and DS_MAX_SCANS determines the number of IO threads for scanning your tables. DS_TOTAL_MEMORY determines the amount of memory allocated for PDQ processing, and there is an algorithm in the manual that shows how these variables and the user's PDQPRIORITY setting combine.
You might also want to consider lifting the RA_PAGES and RA_THRESHOLD values - these determine how many pages are read into memory as 'blocks' before grabbing the next batch. If you're wanting to favour table-scans (which generally you do in DSS) then increasing these to something like 256 and 128 might improve performance.
My experience is with SMP and MPP unix boxes, rather than Windows, so I'm not sure how much you can wring out of your architecture, but this is where you want to start.
I would recommend identifying a good DSS query that runs for a decent length of time, and changing one parameter at a time to see the effect. SET EXPLAIN ON is your friend here, too.
One last thing - 11.7 supports table compression, and the tests I've seen show dramatic improvements in a DSS environment with large reads and irregular writes.
I'm interested in connecting to iOS-based devices over Bluetooth. I can see that the "Local Network" service is exposed, but I cannot find any extra information about it. Property stored under key 0x0204 looks like a Bonjour key.
Which protocol is used? How can one talk to the iOS device using Linux, Mac or one's own embedded device equipped with a Bluetooth chip?
Here's SDP data extracted using Bluetooth Explorer under OS X while the iOS device runs Gameloft's Star Battalion.
{
0x0000 = uint32(1330188565),
0x0200 = uint32(2),
0x0202 = string(004wD7l1A..0|0|0|ivucic-À'),
0x030a = uint32(0),
0x0009 = { { uuid16(11 15), uint16(256) } },
0x0201 = string(_657o30a6rmst07À),
0x0005 = { uuid16(10 02) },
0x0100 = string(Local Network),
0x0001 = { uuid16(11 15) },
0x0203 = string(004wd7l1a..0|0|0|ivucic-_657o30a6rmst07À
0xf000 = uint8(2),
0x0204 = string( txtvers=1state=A),
0x0008 = uint8(255),
0x0006 = { uint16(25966), uint16(106), uint16(256), uint16(26226), uint16(106), uint16(272), uint16(25701), uint16(106), uint16(288), uint16(27233), uint16(106), uint16(304) },
0x0004 = { { uuid16(01 00), uint16(15) }, { uuid16(00 0f), uint16(256), { uint16(2048), uint16(2054) } } },
0x0002 = uint32(0)
},
Other partially relevant questions:
PAN with Linux, iOS, Bluetooth, Bonjour, GameKit — Possible? - Person can solve problem using Wi-Fi. Not solution here because embedded device will not have the way more expensive Wi-Fi chip.
Bonjour over bluetooth WITHOUT Gamekit? - Best answer does not end up providing technical details
iOS bluetooth without GameKit - Provides a solution for a jailbroken device, which is not applicable here.
Researching further with Apple's Bluetooth Explorer in OS X and sdptool in GNU/Linux, I have discovered that key 0x0001 (standing for "protocol class"), containing value of 0x1115, stands for the "PANU" variant of "PAN" - a peer2peer variant. It is notable that OS X does not provide service-side ('hosting') support for this protocol, despite supporting creation of a 0x1116 network, which is the "NAP" variant of "PAN" - a client/server variant.
This might be good news, but only if GameKit's session protocol does not have to be used. Hijacking the media-layer connection established by GameKit in order to send other UDP traffic would be ideal.
I'll still have to research whether or not this GameKit connection really is 0x1115; that is, if it really is "PANU". Does anyone have any further information?
Note while Bonjour automatically announced this Bluetooth service after iOS 3, this has changed with iOS 5. See the answer I posted on how to establish Bluetooth connection without GameKit, where I handily documented information from Apple's Technical Q&A QA1753.
A small amount of research with GNU/Linux did not result in a successful connection. It may be due to lack of knowledge on how to properly use pand. It may also be due to Bluetooth MAC based blocking. I'd love info anyone may have to offer. If I research this further and stumble upon something interesting, I'll update this answer.
Results under Ubuntu. The service appears only when Bluetooth Bonjour is active.
ivucica#ivucica-MacBook:~$ sdptool browse $ADDR #relevant data only
Browsing ADDRESS_HERE ...
Service Name: Local Network
Service RecHandle: 0x4f491115
Service Class ID List:
"PAN User" (0x1115)
Protocol Descriptor List:
"L2CAP" (0x0100)
PSM: 15
"BNEP" (0x000f)
Version: 0x0100
SEQ8: 0 6
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0x110
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0x120
code_ISO639: 0x6a61
encoding: 0x6a
base_offset: 0x130
Profile Descriptor List:
"PAN User" (0x1115)
Version: 0x0100
... and so on ...
Here's the attempt to connect:
ivucica#ivucica-MacBook:~$ pand --connect $ADDR -n
pand[3237]: Bluetooth PAN daemon version 4.98
pand[3237]: Connecting to ADDRESS_HERE
pand[3237]: Connect to ADDRESS_HERE failed. Connection refused(111)
Is some sort of authorization required? Enabling encryption, authentication, secure connection and forcing becoming a master doesn't seem to make any difference (-AESM options in various combinations).
Anyone has any ideas?
Huh!
ivucica#ivucica-MacBook:~$ sudo hcidump
HCI sniffer - Bluetooth packet analyzer ver 2.2
device: hci0 snap_len: 1028 filter: 0xffffffff
HCI Event: Command Status (0x0f) plen 4
Create Connection (0x01|0x0005) status 0x00 ncmd 1
> HCI Event: Role Change (0x12) plen 8
status 0x00 bdaddr ADDRESS_HERE role 0x01
Role: Slave
> HCI Event: Connect Complete (0x03) plen 11
status 0x00 handle 12 bdaddr ADDRESS_HERE type ACL encrypt 0x00
HCI Event: Command Status (0x0f) plen 4
Read Remote Supported Features (0x01|0x001b) status 0x00 ncmd 1
> HCI Event: Read Remote Supported Features (0x0b) plen 11
status 0x00 handle 12
Features: 0xbf 0xfe 0x8f 0xfe 0x9b 0xff 0x79 0x83
HCI Event: Command Status (0x0f) plen 4
Read Remote Extended Features (0x01|0x001c) status 0x00 ncmd 1
> HCI Event: Max Slots Change (0x1b) plen 3
handle 12 slots 5
> HCI Event: Read Remote Extended Features (0x23) plen 13
status 0x00 handle 12 page 1 max 1
Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
HCI Event: Command Status (0x0f) plen 4
Remote Name Request (0x01|0x0019) status 0x00 ncmd 1
> HCI Event: Remote Name Req Complete (0x07) plen 255
status 0x00 bdaddr ADDRESS_HERE name 'Evil iPad'
HCI Event: Command Status (0x0f) plen 4
Authentication Requested (0x01|0x0011) status 0x00 ncmd 1
> HCI Event: Link Key Request (0x17) plen 6
bdaddr ADDRESS_HERE
HCI Event: Command Complete (0x0e) plen 10
Link Key Request Reply (0x01|0x000b) ncmd 1
status 0x00 bdaddr ADDRESS_HERE
> HCI Event: Auth Complete (0x06) plen 3
status 0x00 handle 12
HCI Event: Command Status (0x0f) plen 4
Set Connection Encryption (0x01|0x0013) status 0x00 ncmd 1
> HCI Event: Encrypt Change (0x08) plen 4
status 0x00 handle 12 encrypt 0x01
HCI Event: Number of Completed Packets (0x13) plen 5
handle 12 packets 1
> ACL data: handle 12 flags 0x02 dlen 16
L2CAP(s): Info rsp: type 2 result 0
Extended feature mask 0x02a8
Enhanced Retransmission mode
FCS Option
Fixed Channels
Unicast Connectless Data Reception
HCI Event: Number of Completed Packets (0x13) plen 5
handle 12 packets 1
> ACL data: handle 12 flags 0x02 dlen 20
L2CAP(s): Info rsp: type 3 result 0
Fixed channel list 0x00000006
L2CAP Signalling Channel
L2CAP Connless
HCI Event: Number of Completed Packets (0x13) plen 5
handle 12 packets 1
> ACL data: handle 12 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0000 scid 0x0040 result 2 status 0
Connection refused - PSM not supported
> HCI Event: Disconn Complete (0x05) plen 4
status 0x00 handle 12 reason 0x13
Reason: Remote User Terminated Connection
This?
> ACL data: handle 12 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0000 scid 0x0040 result 2 status 0
Connection refused - PSM not supported
According to this interesting site :
http://code.google.com/p/btstack/wiki/iPhoneBluetooth Apple are using a special chip besides their Bluetooth RF chip which denies any connection for a device without that chip - this means its a lock on the hardware level.
Maybe a bit delayed, but technologies have evolved since so there is certainly new info around which draws fresh light on the matter...
The traditional GameKit has been replaced by Multiper Connectivity together with introducing support for WiFi Direct on iOS, however the framework still remains iOS only. I assume there is proprietary stuff going on in there.
Also, as iOS has yet to open up a direct API for WiFi Direct I believe the best way to approach this is to use BLE, which is supported by both platforms (some better than others).
On iOS a device can act both as a BLE Central and BLE Peripheral at the same time, on Android the situation is more complex as not all devices support the BLE Peripheral state. Also the Android BLE stack is very unstable (to date).
If your use case is feature driven, I would suggest to look at Frameworks and Libraries that can achieve cross platform communication for you, without you needing to build it up from scratch.
For example: http://p2pkit.io or google nearby
Disclaimer: I work for Uepaa, developing p2pkit.io for Android and iOS.
Excluding options field in IPv4 header, after 20 bytes of header, data follows. That data may be TCP packet, or UDP etc.
Now given a IPv4 packet (with header and data), How to find out which type of transport layer packet (TCP/UDP/etc.) is present in data? Actually I am parsing a IPv4 packet so I need to understand this.
The protocol field of the IPv4 header (see RFC791) will tell you:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| IHL |Type of Service| Total Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification |Flags| Fragment Offset |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Time to Live | Protocol | Header Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Destination Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Options | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The protocol numbers are assigned by IANA and are listed here:
http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
Some example protocol numbers are:
1 ICMP
6 TCP
17 UDP
Deep packet inspection? Ipoque release some open source code for this task: opendpi.