Raw TCP/IP data packets

I have done a lot of client/server programming with Server and Client sockets in Java.
However now I need to do raw TCP/IP programming. I would hate to go back to C/C++ to do this kind of programming. Is it possible to do raw tcp/ip programming in Java? Data packet by data packet, headers and the whole works in Java?
Erik

You can even white a sniffer with java (JNI helps a lot;)
Look here -> http://www.goto.info.waseda.ac.jp/~fujii/jpcap/index.html

Similar Messages

Regrd the data packet size

Hi
i have two questions
1) where can i set the data packet size in BW and R3 and also in BI how and where can we set .
2)by what method/logic we will select the key fields in dso.
ex: i have 5 tables in the sourse and each table will have primary keys, now how do we know that particular primary keys should be kept in KEY FIELDS folder in DSO.
full points will be assigned.

HI,
Data package settings for the data to be extracted from R3 to BI can be done through :
1) SBIW>General Settings> Maintain Control Parameters for Data Transfer
These settings are common for all the info packages which extract data from R3.
2) If u want to do settings relevent to specific Infopackage then :
RSA1>Click On the Specific Infopackage>Scheduler(in the Menu Bar)-->DataS Default Data Transfer.
3) And if you want to do DSO Package settings then:
Got to Transaction RSODSO_SETTINGS
Here u can do package settings for DSO activation ,paramenter for SID generation ect.
And selection of Key fileds depends upon the requirement.
Based on the key fields what all the data fileds u want to overwrite or add the corespomding data fields
Regards,
Chaitanya.

Need to build communication redundancy using serial RS-232 for Data Transfer b/w Host and RT irrespective of TCP/IP Data Transfer

Hi - I would like to build the logic in which it should accomodate the communication redundancy using serial RS-232 for Data Transfer b/w Host and RT irrespective of TCP/IP Data Transfer.
I want to do data transfer b/w host and RT through RS232 VISA portal whenever TCP/IP ethernet cable has been unplugged from the controller continuosly , it should keep on checking for TCP/IP link re-establishing also , when ever the tcp/ip link established again that time the communication should be using in that link only. This is accomplished by deploying the RT vi as execuatbale file. I made some logic regards to the above said logic , bur it was not working as much I expected.
I request you to go through the attached two VI's and let me know , what I did wrong in that,
Please do the needful.
Attachments:
TCP_Serial_Host.vi ‏33 KB
TCP_Serial_RT.vi ‏41 KB

even i am new to this topic and i am trying to get familiar with these protocols
refer to tcp server/client examples in labview examples

How to set the data packet in order??

we have 20 datapackets that is in sequence order how to set in order wise ?
Example:- this is the scenario Data packets is in this order 20,1,10,5,9,13,4,8,13,2,15,19,14Like this
I have to set in order wise how to doit??????

HI
I think you sjust should use a process chain.
Call transaction RSPC and build it within the order needed.
regards
Tom

Is Bridge supposed to sort raw files by date modified? Not on my systems.

I have just installed photoshop/bridge cs5 on two windows 7 systems, home premium 64 bit, one an i3 chip and the other an i7 chip. I was formerly using cs3.
I see that Bridge is not sorting my raw files by date modified like it did before. It sorts jpg files okay. I noticed that the xmp files associated with the raw files, when I hover over them in Windows Explorer show the correct modified date but the thumbnail icon shows only creation date, which I assume is as it shou ld be. Why doesn't Bridge CS5 sort raw files by date modified as it did in CS3? CS3 must have referred to the xmp file modified date to use for sorting, I would think.
I should also mention that the metadata file does not show the correct date modified, but gives the same date as the creation date. Also the thumbnails for raw images that have been modified correctly show the icon that indicates it was modified.
Also, I see that when you hover over a thumbnail in Bridge CS5 nothing is revealed about the file. In CS3 Bridge hovering over a thumbnail showed several pieces of data about the file including anything in the file info.
Is this just how Bridge CS5 works or have I missed a setting somewhere in Bridge or Windows?

Curt, thanks for your response. The tool tips
was not checked and did result in "hovering"
working. I'm not sure why that's called tool tips, but okay.
I have just installed the software in the last
few days. I almost immediately got an update
notice and installed the update. I thought I was
up to date. Then, just a while ago I got another
update notice. After installing it the sorting
now works. Thanks much. Problems seem to be solved.

Data packets/size - Generic extractor

Hi all,
We built a custom function module based datasource and it is extracting data to BW in one big packet of 900,000+ records and the load is taking about 18 hours. We are trying to spilt the BW extraction into smaller data packets to improve performance but unable to do so. Following is our extraction program...
Please let me know where we are doing it wrong...
This Program fetches/build e_t_data. The issue is, program does not splitting into packets as the SAP standard program does.
""Local interface:
*" IMPORTING
*" VALUE(I_REQUNR) TYPE SRSC_S_IF_SIMPLE-REQUNR
*" VALUE(I_DSOURCE) TYPE SRSC_S_IF_SIMPLE-DSOURCE OPTIONAL
*" VALUE(I_MAXSIZE) TYPE SRSC_S_IF_SIMPLE-MAXSIZE OPTIONAL
*" VALUE(I_INITFLAG) TYPE SRSC_S_IF_SIMPLE-INITFLAG OPTIONAL
*" VALUE(I_READ_ONLY) TYPE SRSC_S_IF_SIMPLE-READONLY OPTIONAL
*" VALUE(I_DATAPAKID) TYPE SBIWA_S_INTERFACE-DATAPAKID OPTIONAL
*" TABLES
*" E_T_DATA STRUCTURE Z0333W OPTIONAL
*" I_T_SELECT TYPE SRSC_S_IF_SIMPLE-T_SELECT
*" I_T_FIELDS TYPE SRSC_S_IF_SIMPLE-T_FIELDS
*" EXCEPTIONS
*" NO_MORE_DATA
DATA: lr_range_name TYPE rsselect-fieldnm.
DATA: st_e_t_data TYPE z0333w.
STATICS: l_cursor TYPE cursor.
STATICS: called(1) TYPE c VALUE 'N'.
Maximum number of lines for DB table
STATICS: l_maxsize TYPE sbiwa_s_interface-maxsize.
FIELD-SYMBOLS: <l_range> TYPE ANY,
 <l_t_range> TYPE STANDARD TABLE.
IF i_initflag = 'X'.
Initialization: check input parameters
 buffer input parameters
 prepare data selection
Fill parameter buffer for data extraction calls
 g_s_interface-requnr = i_requnr.
 g_s_interface-isource = i_dsource.
 g_s_interface-maxsize = i_maxsize.
 g_s_interface-initflag = i_initflag.
 g_s_interface-datapakid = i_datapakid.
 g_flag_interface_initialized = sbiwa_c_flag_on.
 REFRESH g_t_select.
 REFRESH g_t_fields.
 APPEND LINES OF i_t_select TO g_t_select.
 APPEND LINES OF i_t_fields TO g_t_fields.
ELSE.
first data package of first table -> open cursor
 IF g_counter_datapakid = 0.
*--Get selection ranges
 LOOP AT i_t_select.
 MOVE-CORRESPONDING i_t_select TO <l_range>.
 APPEND <l_range> TO <l_t_range>.
 ENDLOOP.
 l_maxsize = g_s_interface-maxsize.
fetch plants for the company code
 PERFORM get_plants.
fetch mast data into internal table as we will be using MAST for validation
of whether BOM exist or not.
 SELECT * FROM mast INTO TABLE it_mast
 WHERE stlan = '1' OR stlan = '6'.
 SORT it_mast BY matnr werks stlan.
Material BOM information
First data package -> OPEN CURSOR
 OPEN CURSOR WITH HOLD l_cursor FOR
 SELECT mast~matnr
 mast~werks
 mast~stlnr
 mast~stlan
 mast~stlal
 stko~stlty
 FROM mast INNER JOIN stko
 ON stkostlnr = maststlnr AND
 stkostlal = maststlal
 FOR ALL entries IN gt_werks
WHERE mast~matnr IN gr_matnr AND
 mast~werks IN gr_werks AND
 mast~stlan IN gr_stlan AND
 mast~werks = gt_werks-werks AND
 mast~stlal = '01' AND
 stko~stlty = 'M' AND "Material BOM only
 ( maststlan = '1' OR maststlan = '6' ).
 ENDIF.
Fetch records into interface table.
named E_T_'Name of extract structure'.
 REFRESH: gt_mat_bom,gt_mat_bom1.
 FETCH NEXT CURSOR l_cursor
 APPENDING CORRESPONDING FIELDS
 OF TABLE gt_mat_bom
 PACKAGE SIZE i_maxsize.
 IF sy-subrc <> 0.
 CLOSE CURSOR l_cursor.
 RAISE no_more_data.
 ELSE.
get BOM data and fill E_T_DATA
 PERFORM get_bom_data TABLES e_t_data.
 ENDIF.
Increment Package
 g_counter_datapakid = g_counter_datapakid + 1.
ENDIF.
ENDFUNCTION
Thanks,
Anirudh.

I'm not sure, but this might help:
* Fetch records into interface table.
* named E_T_'Name of extract structure'.
DO.
 REFRESH: gt_mat_bom,gt_mat_bom1.
 FETCH NEXT CURSOR l_cursor
 APPENDING CORRESPONDING FIELDS
 OF TABLE gt_mat_bom
 PACKAGE SIZE i_maxsize.
 IF sy-subrc <> 0.
 EXIT.
 ELSE.
* get BOM data and fill E_T_DATA
 PERFORM get_bom_data TABLES e_t_data.
 ENDIF.
* Increment Package
 g_counter_datapakid = g_counter_datapakid + 1.
ENDDO.
CLOSE CURSOR l_cursor.
RAISE no_more_data.
Rob

Need help in logging JTDS data packets

Hi All,
I m having web application which uses SQL Server database.
I have to find out some problems in database connection for that there is need to log the jtds data packets.
I have tried to use class net.sourceforge.jtds.jdbc.TdsCore but in constructor of TdsCore class there are two parameters needed one is ConnectionJDBC2 and another is SQLDiagnostic.
I have tried a lot but it did not allow me to import class *SQLDiagnostic*.
I need help in logging JTDS data packets. If there are any other ways or any body having any idea about logging JTDS data packets/SQLDiagnostic.
Please reply it is urgent...!!
Thanks in advance......!!

if you want to use log4j then,
in your project create a file called log4j.properties and add this
# Set root logger level to INFO and its only appender to ConsoleOut.
log4j.rootLogger=INFO,ConsoleOut
# ConsoleOut is set to be a ConsoleAppender.
log4j.appender.ConsoleOut=org.apache.log4j.ConsoleAppender
# ConsoleOut uses PatternLayout.
log4j.appender.ConsoleOut.layout=org.apache.log4j.PatternLayout
log4j.appender.ConsoleOut.layout.ConversionPattern=%-5p: [%d] %c{1} - %m%n
log4j.logger.org.apache.jsp=DEBUG
#Addon for
com.sun.faces.level=FINEGo to your class and add this line
private static final Logger logger = Logger.getLogger("classname");and then you can use
logger.info();
logger.error();
methods

Maximum size of a data packet

The maximum size of data packet set in configuration is 25MB.
I want to change the size of data packet as 50 MB. I don't want to change it globally(in SPRO). I want to change it only for specific info-package.
But in info-package system does not allow to change the packet size more than 25MB.
Please suggest the way.
Regards,
Dheeraj

Hi..
MAXSIZE = Maximum size of an individual data packet in KB.
The individual records are sent in packages of varying sizes in the data transfer to the Business In-formation Warehouse. Using these parameters you determine the maximum size of such a package and therefore how much of the main memory may be used for the creation of the data package. SAP recommends a data package size between 10 and 50 MB.
https://www.sdn.sap.com/irj/sdn/directforumsearch?threadid=&q=cube+size&objid=c4&daterange=all&numresults=15
MAXLINES = Upper-limit for the number of records per data packet
The default setting is 'Max. lines' = 100000
The maximum main memory space requirement per data packet is around
memory requirement = 2 * 'Max. lines' * 1000 Byte,
meaning 200 MByte with the default setting
3 THE FORMULA FOR CALCULATING NUMBER OF RECORDS
The formula for calculating the number of records in a Data Packet is:
packet size = MAXSIZE * 1000 / transfer structure size (ABAP Length)
 but not more than MAXLINES.
eg. if MAXLINES < than the result of the formula, then MAXLINES size is transferred into BW.
The size of the Data Packet is the lowest of MAXSIZE * 1000 / transfer structure size (ABAP Length) or MAXLINES.
Message was edited by:
 search

Need inputs how to extract data to BI in multiple Data packets from ECC

HI Experts,
would like to know how can i restrict the data to be fetched in multiple data packets as of now all the data is coming in to BI in a single data packet....
I want to get this data in multiple data packets.
I have checked the infopackage settings in BI its as similar to any other Infopackage which is fetching in multiple data packets.
Is there any posibility to restrict data with in ECC

Hussein,
Thank you for the helpfull information.
That document gave me lot of information about ANSI extract for BENIFITS.
Thanks
Kumar.

Oracle VM 2.2.2 - TCP/IP data transfer is very slow

Hi, i've encountered a disturbing problem with OVM 2.2.2.
My dom0 network setup (4 identical servers):
eth0/eth1 (ixbe 10gbit) -> bond0 (mode=1) -> xenbr0 -> domU vif's
Besides bonding setup, it's default OVM 2.2.2 installation.
Problem description:
TCP/IP data dransfer speed:
- between two dom0 hosts: 40-50MB/s
- between two domU hosts within one dom0 host: 40-50MB/s
- between dom0 and locally hosted domU: 40-50MB/s
- between any single domU and anything outside it's dom0 host: 55KB/s -
something is definitely wrong here.
domU network config:
vif = ['bridge=xenbr0,mac=00:16:3E:46:9D:F1,type=netfront']
vif_other_config = []
I have similar installation on Debian/Xen, and everything is running
fine, e.g. i don't have any data transfer speed related issues.
regards
Robert

There is also an issue with the ixgbe driver in the stock OVM2.2.2 kernel (bug:1297057 on MoS). We were getting abysmal results for receive traffic (measured in hundreds of kilobytes!!! per second at times) compared to transmit. It's not exactly the same as your problem, so don't blindly follow what I say below!!!
### "myserver01" is a PV domU on Oracle VM 2.2.2 server running stock kernel ###
[root@myserver02 netperf]# ./netperf -l 60 -H myserver01 -t TCP_STREAM
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to myserver01.mycompany.co.nz (<IP>) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
87380 16384 16384 60.23 1.46
### Repeat the test in the opposite direction, to show TX is fine from "myserver01" ###
[root@myserver01 netperf]# ./netperf -l 60 -H myserver02 -t TCP_STREAM
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to myserver02.mycompany.co.nz (<IP>) port 0 AF_INET
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
87380 16384 16384 60.01 2141.59
In my case, a workaround as advised by Oracle Support is to run:
ethtool -C eth0 rx-usecs 0
ethtool -C eth1 rx-usecs 0
against the slaves within your bond group. This will give you better performance (in my case, got up to ~1.2GBit/s), although there are some fixes coming out in the next kernel which get even better speeds (in my tests, ~2.2GBit/s):
Edited by: user10786594 on 11/09/2011 02:22

Re: Reading data from a data packet

We did not find any driver for our instrument so we are trying to capture data using the method i have explained before. Below is an example of the data packets that we are receiving in our serial port monitoring software.
First data packet       13 88 04 4C 00 00 01 F3 00 00 7B 37 02 EE
Second data packet   13 88 04 4C 00 00 01 EE 00 00 79 D9 02 EE
Third data packet       13 88 04 4C 00 00 01 EB 00 00 78 BA 02 EE
Here as we have seen above 13 88 (5000=Frequency in decimal) 04 4C (represents1100= voltage in decimal) is constant and the ending is represented by 02EE. Apart from tis the rest (for the first packet 01 F3= 499 assuming current and 7B 37 = 31543 assuming power keeps on changing in every packet and they all have different scaling ). The 00 00 just represents the padding between them. Now we have to read the values in altogather say in different boxes and produce them in LabVIEW front panel. Here i have attached a picture of the instrument reading side by side with the serial monitoring software reading. How do i do that? i have read something called visa read and write but they only accepts strings not in bytes. Any kind of help is appreciated.

Duplicate Post

How to select more than one data packet?

Hi,
I have uploaded data using 3 different data packets. However, for each of these packets there are some errors.
Using Monitor > PSA Maintenance, I want to display error data records for all three different data packets in one screen. These erratic data will be send to our users for their rectification. However, I can only select and disply erratic data records packet by packet. So this has to be done three time instead of once.
Can u advise on how to display all erratic data records in one screen.

Hello Fulham FC,
How r u ?
I feel it is possible to select all 2 or more requests at once. Provide
...No. of Records ---> count the total no of records in the packages u select.
...From Record -
> 2147483647
Then try CONTINUE. In our system its throwing Dump !!!
I believe dude, in PSA Maintenence there is a button SELECT ALL & even in the data package also it is allowing to select two or more. There should be some way to do this.
Best Regards....
Sankar Kumar
+91 98403 47141

Data package and data packet

Hit
i want to know the difference between data package and data packet .when this comes in sap bw
with regards
tushar

Hello,
Data package term is related to DTP which is used to load Data from PSA to further Data Targets
Start and end routine works at package level so routine run for each package one by one .By default package have sorted data based on keys (non unique keys (characteristics )of source or target) and by setting semantic keys you can change this order.So Package having more data will take more time in processing then package have lesser data .
Data Packet Term is related to Info Package which is used to load data from Source System to BI (PSA).
As per SAP standard, we prefer to have 50,000 records per one data packet.
For every data packet, it does commit & save --- so less no. of data packets required.
If you have 1 lakh records per data packet and there is an error in the last record, the entire packet gets failed.
Hope it helps!

Arrived in BW Processing: Data packet not yet processed

Hello Gurus,
Data is being loaded from export datasource (8RL*****) ti 2 data targets
The overall QM status is red (says processing is overdue)
The details tab shows
Extraction: Error occurred
Transfer(IDoc and TRFC): Error occurred
Processing (Data packet): Error occurred
   -- Transfer rule: Error occurred
     Bewegungsdaten received.Processing being started
     Message missing(35676 records) : Transfer rule finished
Update rule (0 records):Missing messages
Update(0 new/0 changed): Missing message
Processing end: Missing message
I checked the LUW in SM58 but didnt find anything.
I checked infosource (PSA) - one request is in RED, but when i check the data in PSA there are no errors.
What should I do in this case?
What might be the excat error.
Kindly inform.
Regards,
NIKEKAB

Hi,
Check the DataSource in RSA3, if it is working fine and able to see the data in RSA3, there is no problem in DS level, then checl the Mappings and any routines in BW for that DS, if this is also fine then check the below options.
See Dumps in ST22, SM21 also.
Check RFC Connection between ECC and BW systems, i.e. RSA1-->Source System->Right Click on Source system and Check.
You must have the following profiles to BWREMOTE or ALEREMOTE users.So add it. Bcoz either of these two users will use in background to get extract the data from ECC, so add these profiels in BW.
S_BI-WHM_RFC, S_BI-WHM_SPC, S_BI-WX_RFC
And also check the following things.
1.Connections from BW to ECC and ECC to BW in SM59
2.Check Port,Partner Profiles,and Message Types in WE20 in ECC & BW.
3.Check Dumps in ST22, and SM21.
4.If Idocs are stuck i.e see the OLTP Idoc numbers in RSMO Screen in (BW) detials tab see in bottom, you can see OLTP Idoc number and take the Idoc numbers and then goto to ECC see the status in WE05 or WE02, if error then check the log else goto to BD87 in ECC and give the Idoc numbers and execute manually and see in RSMO and refresh.
5.Check the LUWs struck in SM58,User Name = * (star) and run it and see Strucked LUWs and select our LUW and execute manually and see in RSMO in BW.
See in SDN
Re: Loading error in the production system
Thanks
Reddy

Data packet not yet processing in ODS load??

Hi all,
I got an error when I loaded data from IS to the ODS. Can someone let me know why and how to resolve it. Thank you in advance.
Here is the error message in the monitor:
Warning: data packet 1 & 2 arrived BW; processing: data packet not yet processing.
(No data packet numbers could be determined for request REQU_77H7ERP54VXW5PZZP5J6DYKP7)
Processing end:
transfer rules (0 record): missing message
Update PSA (0 record): messing messages
Update rules (0 record): messging messages

John,
I dont think its space problem.In st22 go with detail note.
What happend, how to correct it.Will help you to solve the problem.
Check this note 613440 also.
Note : 647125
Symptom
A DYNPRO_FIELD_CONVERSION dump occurs on screen 450 of the RSM1 function group (saplrsm1).
Other terms
DYNPRO_FIELD_CONVERSION, 450, SAPLRSM1
Reason and Prerequisites
This is caused by a program error.
The screen contains unused, hidden fields/screen elements that are too small for the screen check that was intensified with the current Basis patch (kernel patch 880). These fields originate in the 4.0B period of BW 1.0 and are never used.
Solution
Depending on your BW system release, you must solve the problem as follows:
BW 3.0B
 ImportSupport Package 14 for 3.0B (BW 3.0B Patch 14 or SAPKW30B14) into your BW system. This Support Package will be available when note 571695 with the short text,"SAPBWNews BW 3.0B Support Package 14", which describes this Support Package in more detail, is released for customers.
BW 3.1 Content
 ImportSupport Package 8 for 3.1 Content (BW 3.10 Patch 08 or SAPKW31008) into your BW system.This Support Package will be availablewhen note 571743 with the short text, "SAPBWNews BW 3.1 Content Support Package 08", is released for customers.
The dump occurs with the invisible G_NEW_DATUM date field on the bottom right of the screen, which is only 1 byte long and can be deleted.
You can delete the following unused fields/screen elements:
%A_G_NEW_NOW Selectionfield group
G_NEW_ZEIT Input/output field
G_NEW_UNAME Input/output field
G_NEW_DATUM Input/output field
%#AUTOTEXT021 Text field
G_NEW_NOW Selection button
G_NEW_BATCH Selection button
You can delete these fields/screen elements because they are not used anywhere.
This deletion does not cause any problems.
After you delete the fields/screen elements, you must also delete the following rows in the flow logic in screen 450:
FIELD G_NEW_DATUM MODULE DOKU_NEW_DATUM.
FIELD G_NEW_ZEIT MODULE DOKU_NEW_ZEIT.
The function group is then syntactically correct.
Unfortunately, we cannot provide an advance correction.
The aforementioned notes may already be available to provide information in advance of the Support Package release.However, the short text will still contains the words "preliminary version" in this case.
For more information on BW Support Packages, see note 110934.
Thanks
Ram

Raw TCP/IP data packets

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