Send packets using jpcap

dear all
i cannot send packets using jpcap
it doesnot give any error
just run but no packets transmitied (although it captures correctly)
i used the ping example came with it but not work
if anyone worked with him
please help me even with source
thanx

How do you know it isn't sending them?

Similar Messages

Can we get the L7 data for packet using jpcap

Hi ,
I am new to jpcap library. I want to retrieve the layer information from the Pcap file. I captured the packets on my interface and saved as pcap file. Now I want to retrieve the Layer 7 data (like http request and responses) from the pcap files. Is it possible using jpcap library???
I am really strucked at this point in my project...:(

Hi,
You try ur logic in
do ---endo.
after describing the table .
Do the loop for the number of records available.
i.e. as per your logic.
describe table i_hdr line h_lines.
do h_lines times.
put your above code and enddo.
Hope this will work.

How to send packet using tcp socket ?

hi ,
i want to using tcp socket to send data in ipv6 environment. but why the data transfer is less than ipv4 environment?
socket = new Socket("2001:0238:0600::2", 1234);am i wrong ?

bobby92 wrote:
why the data transfer is less than ipv4 environment?What do you mean?
>
socket = new Socket("2001:0238:0600::2", 1234);am i wrong ?No idea, since I've no idea what you're asking.

Sending udp packets using java and receiving it using c

hi,
Is it possible to send udp packets using java and receive the same using c??????? if yes.... plz help immediately.

The biggest issue is data format. The JVM is big endian, with 16-bit characters. The machine running 'C' could be almost anything. A (signed!) byte array is probably the easiest unit of exchange.
The Java program has its own techniques for storing/retrieving data to/from the byte array - and the C program has its own techniques. ASCII Strings are often the easiest to exchange - just convert the java String objects to byte array and send them.
apaliwal1 has already given the UDP calls to send/receive the data.

TDS Connect Failure Error 17832 - Login Packet used to open the connection is structually invalid

I have a package which uses TDS, Tabular Data Stream, to connect from a VAX VMS system to SQL server and it works for all flavors of SQL server. Except for one server. When I try to connect to this server the application gets disconnected after sending the
Login 7.x message. The server is running Windows 2008 R2 Standard, SP1, 64-bit and is in a domain. SQL Server is 2008 R2 (10.50.4000). SQL Server is configured for "SQL Server and Windows Authentication mode" in Server Properties,
Security, Server authentication. It is set to "allow remote connections to this server". The TCP/IP Client Protocol is enabled in SQL Server Network Configuration, Protocols for MSSQLSERVER. The SQL log shows 2 Logon source errors
upon the connection attempt :
Error: 17832, Severity 20, State 11.
The login packet used to open the connection is structurally invalid; the connection has been closed. Please contact the vendor of the client library. [CLIENT: 172.19.20.122]
I took a dump of the login packet from the client side package and included it here:
Sending Login7.x message
Sending PktTyp=10 LstPkt=01 PktNum=0001 PktSiz=00B8
0000 b0 00 00 00 01 00 00 71 00 10 00 00 07 00 00 00
0010 a8 00 00 00 00 00 00 00 e0 03 00 00 68 01 00 00
0020 04 09 00 00 56 00 06 00 62 00 02 00 66 00 02 00
0030 6a 00 06 00 76 00 0c 00 00 00 00 00 8e 00 0c 00
0040 a6 00 00 00 a6 00 05 00 00 06 5b e4 96 08 00 00
0050 00 00 b6 00 00 00 4c 00 54 00 56 00 56 00 53 00
0060 42 00 51 00 41 00 b0 a5 b1 a5 47 00 41 00 4e 00
0070 53 00 4b 00 45 00 69 00 68 00 65 00 2d 00 70 00
0080 61 00 2d 00 73 00 71 00 6c 00 30 00 31 00 54 00
0090 44 00 53 00 5f 00 53 00 45 00 52 00 56 00 49 00
00a0 43 00 45 00 53 00 48 00 38 00 34 00 44 00 42 00
0000        q                    h       V   b   f   j
v
0040           [           L T V V S B Q A     G A N S K E i h e - p
0080 a - s q l 0 1 T D S _ S E R V I C E S H 8 4 D B
I found other sites which discussed the connection ring buffers and so, I queried them for any information which might help:
select cast(record as xml) xml_record from sys.dm_os_ring_buffers where ring_buffer_type = 'RING_BUFFER_CONNECTIVITY';
xml_record:
<Record id="53" type="RING_BUFFER_CONNECTIVITY" time="1697484630">
<ConnectivityTraceRecord>
    <RecordType>ConnectionClose</RecordType>
    <RecordSource>Tds</RecordSource>
    <Spid>0</Spid>
    <SniConnectionId>32E3FDFC-2BF2-4EB8-82D2-AE05E73AFCBC</SniConnectionId>
    <SniProvider>7</SniProvider>
    <RemoteHost>172.19.20.122</RemoteHost>
    <RemotePort>1069</RemotePort>
    <LocalHost>156.144.249.81</LocalHost>
    <LocalPort>1433</LocalPort>
    <RecordTime>11/7/2014 15:13:42.729</RecordTime>
    <TdsBuffersInformation>
      <TdsInputBufferError>0</TdsInputBufferError>
      <TdsOutputBufferError>0</TdsOutputBufferError>
      <TdsInputBufferBytes>184</TdsInputBufferBytes>
    </TdsBuffersInformation>
    <TdsDisconnectFlags>
      <PhysicalConnectionIsKilled>0</PhysicalConnectionIsKilled>
      <DisconnectDueToReadError>0</DisconnectDueToReadError>
      <NetworkErrorFoundInInputStream>0</NetworkErrorFoundInInputStream>
      <ErrorFoundBeforeLogin>1</ErrorFoundBeforeLogin>
      <SessionIsKilled>0</SessionIsKilled>
      <NormalDisconnect>0</NormalDisconnect>
      <NormalLogout>0</NormalLogout>
    </TdsDisconnectFlags>
</ConnectivityTraceRecord>
<Stack>
    <frame id="0">0X0000000001E21F3B</frame>
    <frame id="1">0X0000000001E1EE4E</frame>
    <frame id="2">0X00000000010D2984</frame>
    <frame id="3">0X0000000000A8AB94</frame>
    <frame id="4">0X0000000000A8B05E</frame>
    <frame id="5">0X0000000000A8AD57</frame>
    <frame id="6">0X0000000000F651DE</frame>
    <frame id="7">0X0000000000F65395</frame>
    <frame id="8">0X0000000000F68925</frame>
    <frame id="9">0X0000000000F659D6</frame>
    <frame id="10">0X00000000755937D7</frame>
    <frame id="11">0X0000000075593894</frame>
    <frame id="12">0X00000000779159ED</frame>
    <frame id="13">0X0000000077B4C541</frame>
</Stack>
</Record>
I feel the problem is in the configuration of the server's authentication which is requiring something beyond SQL server authentication.
Any help would be appreciated. Thanks in advance.

One other item of note is the "SQL Server Network Configuration (32bit) "on this server is empty -- no "Protocols for MSSQLSERVER" branch like the 64-bit "SQL Server Network Configuration".
This is perfectly normal if all you have is a 64-bit instance on the machine. You would only see items here if you have a 32-bit server.
The odd part is the Native Client Configuration shows up under (32bit) with Client Protocols...
Yes, you always have a 32-bit client, which is to be used with 32-bit applications.
In any case, whether server is 32-bit or 64-bit is immaterial when you connect.
I'm afraid that I have not worked with TDS packets so that I can say what is wrong with this package, and I don't think I will try to read the TDS spec to say what the problem may be. But the issue seems to be that whatever you are using to create
the TDS packets is not doing this fully correctly.
Erland Sommarskog, SQL Server MVP, [email protected]

Blocking network packets using java

Hello Friends,
I am trying to develop a firewall application using java.I am able to capture packets using third party library called jpcap(from sourceforge).
Now, the problem is how to block packets.There is no library as such ,to my knowledge atleast,to block network packets.I am finding for a solution
regards,
raj

What do you mean?
Dropping a TCP/UDP packet would happen at the IP level. Given that TCP/UDP runs on IP (and ICMP as well) that means that basically you must impliment a stack.
Conversely it might be that the specific stack you are using provides that functionality and you just need to configure it. That would be done via JNI (and has nothing to do with IP/TCP/UDP.)
If all you are doing is proxying, which is what a firewall does, then you recieve a TCP packet and then just drop it or forward it. Doing that in a Java application however is not actually the same as most firewalls (certainly not dedicated boxes.)

Send packets in J2ME

Hello,
I've been required to send packets to a web server. The packet is used to store the data and the information about an image that is being sent. In the protocol the offsets in the packets are:
Offset 0: package id
Offset 1: package name
Offset 2: data encoding type
Offset 3: data length
Offset 4: image hash
How do I create this packet in j2me and send it to the server?
Is it a matter of putting this information in a byte array and sending the byte array over http?

Is it a matter of putting this information in a byte array and sending the byte array over http?Yes.
Do following
1) Open a HTTPConnection with the url.
2) Set HttpConnection.POST as request method.
3) Set other request properties.
4) Open OutputStream with this HTTPConnection
5) Write the byte array to the OutputStream.
6) Flush the OutputStream.
Atul

Loss of sending email using WIFI

As of this morning 8-20-08, after updating to 2.02, I no longer am able to send emails using my own wireless network. Previously this was no problem. Neither Fido or Apple have any idea of what I am talking about. Fido washed their hands as they do not support WIFI. How convenient, they sell the phone and charge for the service but do not support it. Videotron, my ISP, thinks the issue is my wireless router but I can send via gmail so that's out. I resovled the problem by configuring my accounts to use my gmail smtp server as a second option and now the spinning wheel is short lived and messages are sent.
I'm sorry to say that I had fallen for all the hype about Apple but truth is they are but a Microsoft wannabe.
Disinchanted

So here's the wierd thing.
I was having the same problems. Set up SMTP for Videotron when at home using relais.videotron.ca SMTP with no authenticationon port 25 & all was good in the world. However when I went out, bang. Nothing. Couldn't send a mail for love nor money.
Thought aboutit & changed settings to use relais.videotron.ca SMTP, but this time using authentication of vltl** / password credentials with no SSL (Videotron doesn't use SSL) and again everything was fine. Of course, when I got home again, bang. Everything fell over & no more mail sending foe me!
So I figure, when I'm at home I'm on my trusted network at port 25, I don't need authentication and all is good, but when I'm out i'm seen as potential SPAM by port 25 on videotron & get blocked.
Tried using port 587 instead when for both home & mobile but had no luck either.
Then a strange thing happened. I'd resolved to having to set up 2 SMTP servers on my iPhone & switching between the two based on where I was. Pain in the a**, but there's always a trade off for early adopter technology So I set up my primary SMTP to use port 25 with no authentication, and a secondary server to use the same relais.videotron.ca outgoing server, but this time WITH authentication using vltl** \ password credentials.
After a walk to the shop when I'd been on my secondary SMTP server (successfully sending & recieving) I came home & inadvertantly forgot to swith back to my primary SMTP. Recieved a mail & then responded with no problem!
Net result, I now have a permanently switced off primary server & a permanently switched on secondary server which uses relais.videotron.ca details with vltl** \ password authentication credentials active (like I did on my old silver iPhone) & all is good in the world, both at home & out mobile, both for sending & recieving!
Will field test some more tomorrow but it may be a 2.0.2 bug where ther primary server details fcuk up whereas the secondary server details are stable.
So long as it works, who cares!
Jof

How can I send email using two different email address that both link back to my one exchange account on my Ipad mini

How can I send email using two different email address that both link back to my one exchange account on my Ipad mini?
On my PC I simply have a master return email address and use a POP for the secondary address. Both are through the one exchange account without a problem. I need to be able to do the same on my Ipad.

Ah, I should have made that clear. My domain didn't come from google. It was purchased at and is hosted at dreamhost, but I haven't used their email servers in years - I just route everything through gmail. I actually have a bunch of domains (with websites).
Gmail has an option that lets someone with custom domains send (and receive) email through gmail using the custom domain once Google confirms proper ownership of the domain (to prevent spammers and such). Gmail has a setting for "send email as" which allows gmail to be sent using a custom domain as the sender. I'm pretty sure Apple's old mobileme had this feature too, but I didn't use it.

Problems to SEND MAIL using WWV_FLOW_MAIL.SEND - APEX_MAIL

I tried send mail using the code below
DECLARE
l_body      CLOB:= EMPTY_CLOB;
l_body_html CLOB:= EMPTY_CLOB;
BEGIN
wwv_flow_api.set_security_group_id;
l_body :='<html>
+<head>+
+<style type="text/css">+
+body{font-family: Arial, Helvetica, sans-serif;+
                               +font-size:10pt;+
                               +margin:30px;+
                               +background-color:#ffffff;}+
+span.sig{font-style:italic;+
font-weight:bold;
color:#811919;}
+</style>+
+</head>+
+<body>+
+</html>';+
l_body_html := '<html>
+<head>+
+<style type="text/css">+
+body{font-family: Arial, Helvetica, sans-serif;+
                               +font-size:10pt;+
                               +margin:30px;+
                               +background-color:#ffffff;}+
+span.sig{font-style:italic;+
font-weight:bold;
color:#811919;}
+</style>+
+</head>+
+<body>+
+</html>';+
wwv_flow_mail.send('[email protected]','[email protected]',nvl(l_body,'Texto com erro'),nvl(l_body_html,'erro2'),'K','[email protected]',
+'[email protected]','[email protected]');+
wwv_flow_mail.push_queue;
END;
+/+
This code return the message:
Mail To From Subject CC BCC Created On Created By Error Created
CHECK$01 [email protected] [email protected] K [email protected] [email protected] 08/23/2010 03:05:00 PM SYS
ORA-06502: PL/SQL: erro: erro de conversão de caractere em número numérico ou de valor
Follow my mail settings
SMTP Host Address : POP.SLE.TERRA.COM.BR
SMTP Host Port 110
Administration Email Address [email protected]
Notification Email Address [email protected]
what´s wrong ?

I would try sending just basic text first, then move on to getting your other pieces dynamics. The very last step to me would be the email body.
Here is an example of a basic text email I use:
declare
e_id        NUMBER;
c_id        NUMBER;
emp_nm      VARCHAR2(100);
clrk_id     NUMBER;
e_clrk      VARCHAR2(47);
e_org       NUMBER;
e_sender    VARCHAR2(50);
e_recip_lst VARCHAR2(255);
e_cc        VARCHAR2(100);
e_bcc       VARCHAR2(100);
e_subj      VARCHAR2(50);
e_msg_ln1   VARCHAR2(100);
e_msg_ln2   VARCHAR2(100);
e_msg_ln3   VARCHAR2(100);
e_msg_ln4   VARCHAR2(100);
e_msg_ln5   VARCHAR2(100);
e_msg       VARCHAR2(1000);
CRLF        CHAR(2) := CHR(13) || CHR(11);
tmp_flag    NUMBER;
begin
   if :P2_INJURY_FLAG = 1 then
   -- find out if it has changed first so we don't keep sending emails
    select injury_flag, VEH_LOC
      into tmp_flag, e_org
      from APPS.tc
     where tc_id = :P2_TC_ID;
   if :P2_injury_flag <> tmp_flag then
    begin
       select FN_GET_USER(nvl(v('APP_USER'),user))
         into clrk_id
         from dual;
      select ADMIN_USERNAME
         into e_clrk
        from APPS.APEX_ACCESS_CONTROL
       where ID = clrk_id;
    exception
       when others then null; -- in case we cannot find the user
    end;
    e_id          := :P2_EMP_ID;
    c_id          := :P2_TC_ID;
    select EMP_FNAME ||' '|| EMP_MNAME ||' '|| EMP_LNAME into emp_nm
      from APPS.EMPLOYEES
     where EMP_ID = e_id; --
    select RECIPIENTS, CC, BCC
      into e_recip_lst, e_cc, e_bcc
      from APPS.SAFETY_NOTIFICATIONS
     where ORG_ID = e_org; --
      e_sender    := '[email protected]';
      e_subj      := 'Loss Reported';
      e_msg_ln1   := 'Employee: ' || emp_nm || ' (' || e_id || ')'
                      || CRLF;
      e_msg_ln2   := 'Was reported as sustaining a loss' || CRLF;
      e_msg_ln3   := 'by ' || e_clrk ||CRLF;
      e_msg_ln4   := CRLF;
      e_msg_ln5   := 'Sent ' || to_char(sysdate,'MONTH DD,YYYY HH:MI AM');
      e_msg       := e_msg_ln1 || e_msg_ln2 || e_msg_ln3 || e_msg_ln4 || e_msg_ln5 || CRLF || e_recip_lst;
     utl_mail.send(
       sender => e_sender,
       recipients => e_recip_lst,
       cc => e_cc,
       bcc => e_bcc,
       subject => e_subj,
       message => e_msg);
end if;
end if;
end;

IPhone cannot send email using Yahoo account. iPhone no envia correo Yahoo.

Hi Everyone,
I just got my iPhone from Movistar Venezuela and I've found I'm unable to send email using my Yahoo account. However, I can receive Yahoo email just fine (paid $20 for Mail Plus subscription), my GMail account can send and receive perfectly, and I can go surfin' Safari with no problems too.
The error message I get is "Cannot send mail: an error occurred while delivering this message". I called Movistar Customer Support and they said everything was fine on their end...
In typical Apple fashion, the error message is so simple I have no idea where the problem is. Does anyone know how can I get more information and how to solve this annoying problem? My Yahoo account is actually my primary account...
Thanks in advance!
Saludos a todos,
Acabo de comprarme un iPhone de Movistar en Venezuela y me encuentro sin poder enviar emails con mi cuenta Yahoo. Sin embargo, si puedo recibir correo Yahoo bien (pague $20 por mi suscripcion a Mail Plus), mi cuenta de GMail si puede enviar y recibir email sin problema y puedo navergar con Safari sin ningun problema.
El mensaje de error que recibo es el siguiente": "No se puede enviar correo: se ha producido un error al enviar el mensaje". Llame a Atencion al Cliente de Movistar y me dijeron que no habia ningun problema con mi linea o con su servicio de datos...
Como tipica cosa Apple, el mensaje de error es tan simple que no tengo NI IDEA de cual es el problema. Alguien mas ha sufrido este problema? Sabe alguien como puedo obtener mas informacion de este error y como solucionarlo? Lamentablemente, mi cuenta Yahoo es mi correo principal...
Gracias de antemano!

Creo que resolvi el problema, temporalmente.
1) Borra tu cuenta
2) Vuelvela a crear
3) Ve a Ajustes
4) Ve a Mail Contactos Calendarios
5) Ve a la cuenta problematica
6) Ve a SMTP
7) Anadir nuevo
8)
Nombre servidor: smtp.mail.yahoo.com
Nombre de usuario: no dejar vacio
Contrasena: no dejar vacio
Usar SSL: si
Autenticacion: Contrasena
Puerto del Servidor: 25
Lo consegui de aqui: http://www.emailaddressmanager.com/tips/mail-settings.html
Dime que tal te funciona.
I think I solved the issue, temporarily at least
1) Delete account
2) Create again
3) Go to settings
4) Go to Mail, Contacts, Calendars
5) Open problematic account
6) Go to SMTP
7) Add a new server
8)
Name: smtp.mail.yahoo.com
User name: do not leave blank
Password: do not leave blank
SSL: Yes
Autentication: Password
Port: 25
I got this info from: http://www.emailaddressmanager.com/tips/mail-settings.html
Let me know how this works

Cannot send email using port 465 from a network other than my ISP

I cannot send email from my ISP POP mail account when I am in a different network (e.g. when traveling). This happens with my iPad and my iPhone. However, I can send mail if I turn off wifi and use 3G. The outgoing port is 465.
Using my .mac account I don't have any problems sending mail using wifi or 3G.
I have tried adding smtp.mac.com or smtp.me.com as a secondary server to my POP account but it does not work. The secondary server disappears after I add it.

Contact your isp and ask them what the smtp settings are for when you are traveling. Most isps have different settings for sending email when off their network.

Cannot Send Mail using AIM account.

I can receive mail fine but when I try to send mail I get the following message:
Cannot send mail using the server smtp.aim.com:EmilyLozano.
Use the pop-up menu below to try a different outgoing mail server. All messages will use this server until you quit Mail or change your network settings.
Message from: Emily Lozano <[email protected]>
I left for a trip a few days ago, came back and now for no apparent reason cannot send mail as I always have. I have reconfigured the port to 587 and that did not help. Any suggestions? (I can send and receive fine via the web, but I really hate it.)

I'm glad you got it figured out. So many times people on this forum sit around waiting for help when they could have retraced their steps, like you did, to figure out the source of the problem.

"Cannot send message using the server....."

Hi all,
Considering the nature of the problem I am about to relate I would have to say at the outset that I would be very very surprised if other people have not come across this problem, so here goes...
We have around 60 users of Apple Mail from both 10.4 and 10.5, so varying degrees of versions of Apple Mail however most if not all are updated to 10.4.11 and 10.5.2.
We have been plagued with people being frustrated about emails bouncing back with an immediate error which is basically the following...
"Cannot send message using the server smtp.xxx.com:user
Sending the message content to the server failed.
Select a different outgoing mail server from the list below etc etc"
I am sure a lot of you have seen this error.
However, it is totally random but I am at the end of my tether with it. It generally revolves around emails with attachments and can be totally random. I was trying to send a screenshot today, very small screenshot, using the Apple-Shift-4 technique, sent the .png file, then saved it out as a .jpg, nothing. Tiny file, around 5k. Got the error above, took it out, sent no problem. Other similar files on the desktop refused to send but a .pdf did. I then thought it might be our server, so sent teh same attachments using my .mac account. Same result and failed to send. Reports from other users in our group show that they too get random results, maybe moving the attachment in the email makes it go, sometimes putting it before your signature, sometimes putting your signature copied and pasted in so many times makes it work, all sorts of methods but all resulting in the same conclusion, Apple Mail can be very unreliable.
We have even migrated some users to Entourage and the problem disappears. Even to Thunderbird, but those users miss the search capability as it is quicker and more reliable. So they want to go back.
Considering I have been struggling with this issue back in the day when we were on the Apple Mail related version in 10.4 I was hoping that the version released in 10.5 would remedy the problems. Sometimes I feel it has just got worse.
Is anyone else experiencing this sort of difficulty in Apple Mail, I really feel isolated and at a loss with how to remedy this for so many users.
If anyone can share their experiences and how they have got around similar issues in Mail I am all ears and open to any suggestions.
Thanks everyone for taking the time to read through this. There is more but the experiences are so random it is not worth trying to put it all down.
Thanks again.
Gerry McCoy

I went in to Connection Doctor and. oddly enough, for this Mac account it said I was on Port 25. Si I changed it to Port 587 and saved the changes.
Still, I have the same problem with the same error messages.
I go back to the mail preferences > Accounts > Advanced and it shows Port 143 still there grayed out.
What about SSL - it's not checked.
Odd that this problem only seems to be from one .mac account emailing to another .mac account. Could the server be down?

Cannot send message using the server (null)

i use mail 2.1.
i have a .mac account and have three other email accounts attached to my mail account.
lately, i cannot send any email.
the switchiing ports fix hasn't helped either.
this is the error message:
CANNOT SEND MESSAGE USING THE SERVER (null)
The server response was: 5.1.0 <email [email protected]>...
From address does not match authentication.
Use the pop-up menu below to try a different outgoing mail server. All messages will use this server until you quit Mail or change your network settings.
Message from: email <[email protected]>
Send message using: [there is a combo box here with all the four accounts servers listed]
no matter which one i pick it doesn't work and no email is sent.
anyone have this error before? or now how to fix it?
i'd be appreciative.
thanks
1.67 GHz Power PC PowerBook G4 Mac OS X (10.4.6) Sony HDR HC3 HD HandyCam MiniDV

I was having a similar problem (don't feel like typing all the details)
I was about to to delete my com.apple.mail.plist, when finally it hit me.
I ran ethereal (again, I'm sorry, but learning how to use ethereal is a topic unto itself). Following the TCP stream (ie. looking at the smtp messages being sent back and forth) I came across two problems. For some reason my port number was set to 567 or something like that, when it's supposed to be 25, as I had originally set it to.
Once I corrected the port number I started receiving an error message from the smtp server. It said the return email address could not be authenticated. (using xyz.com as an example) The correct return email address was supposed to be [email protected], but for some reason it was changed to john@xyz in the account settings.
Anyway, to get to the point, another thing to check is that your return address has been set correctly, and if all else fails, make sure you have X11 installed and use fink to install and run ethereal. This will let you know if you are actually connecting to the server, and will show you any error messages.
PS. I think this problem started occurring with the last update made to mail. I believe it somehow corrupted my settings. This would explain how my port number could have been changed to the default port number of .mac mail.

Send packets using jpcap

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