How to process Client side's TCP Payload after SERVER_CONNECTED?

You should do something in the line:

when SERVER_CONNECTED {
    TCP::collect
}
when SERVER_DATA {
   TCP::payload replace 0 [TCP::payload length] "Your string"
   TCP::release
}

It depends where you started the collect process, if you started it in CLIENT_ACCEPTED event it will collect the client side of data. You might also look into

serverside { TCP::collect }
clientside { TCP::collect }

to be more specific where you want the collection to happen

I read too fast. If you need to process client data after first server event, you could do

when SERVER_CONNECTED {
    clientside {TCP::collect}
}

Thanks for replying.

 

 

I have been tried to write some iRule as the following like:

 

 

when CLIENT_ACCEPTED {

 

snat x.x.x.x

 

}

 

 

when SERVER_CONNECTED {

 

set SNAT_IP [serverside {IP::client_addr}]

 

clientside { TCP::collect }

 

}

 

 

when CLIENT_DATA {

 

TCP::payload replace 0 4 $SNAT_IP

 

TCP::release

 

TCP::collect

 

}

 

 

I found that F5 will receive some tcp payload when CLIENT_ACCEPTED event raised so that

 

I will miss some tcp payload to replace string which I want to change.

 

 

I want to process the *first* tcp payload after SERVER_CONNECTED raised. That means

 

the CLIENT_DATA with first payload raised after SERVER_CONNECTED.

 

 

Does my codes have any wrong?

Thanks for replying.

 

 

I have been tried to write some iRule as the following like:

 

 

when CLIENT_ACCEPTED {

 

snat x.x.x.x

 

}

 

 

when SERVER_CONNECTED {

 

set SNAT_IP [serverside {IP::client_addr}]

 

clientside { TCP::collect }

 

}

 

 

when CLIENT_DATA {

 

TCP::payload replace 0 4 $SNAT_IP

 

TCP::release

 

TCP::collect

 

}

 

 

I found that F5 will receive some tcp payload when CLIENT_ACCEPTED event raised so that

 

I will miss some tcp payload to replace string which I want to change.

 

 

I want to process the *first* tcp payload after SERVER_CONNECTED raised. That means

 

the CLIENT_DATA with first payload raised after SERVER_CONNECTED.

 

 

Does my codes have any wrong?

what about this?

[root@ve10:Active] config  b virtual bar80 list
virtual bar80 {
   snat automap
   pool foo
   destination 172.28.19.252:80
   ip protocol 6
   rules myrule
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when CLIENT_ACCEPTED {
  log local0. "-"
}
when CLIENT_DATA {
  log local0. "-"
  log local0. "[TCP::payload]"
  log local0. "[LB::server addr]:[LB::server port]"
  TCP::release
  TCP::collect
}
when LB_SELECTED {
  log local0. "-"
  TCP::collect
}
when SERVER_CONNECTED {
  log local0. "-"
  TCP::collect
}
when SERVER_DATA {
  log local0. "-"
  log local0. "[TCP::payload]"
  TCP::release
  TCP::collect
}
}

[root@ve10:Active] config  tail -f /var/log/ltm
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : -
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : -
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : -
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : GET / HTTP/1.1  User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5  Host: 172.28.19.252  Accept: */*
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : 200.200.200.101:80
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : -
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : -
Jan 14 22:41:17 local/tmm info tmm[4884]: Rule myrule : HTTP/1.1 200 OK  Date: Mon, 14 Jan 2013 15:06:17 GMT  Server: Apache/2.2.3 (CentOS)  Last-Modified: Sat, 27 Oct 2012 03:22:35 GMT  ETag: "4183f3-59-f28f94c0"  Accept-Ranges: bytes  Content-Length: 89  Content-Type: text/html; charset=UTF-8       This is 101 host.   

have you seen this article?

 

 

Oracle RAC Connection String Rewrite by Jason

 

https://devcentral.f5.com/tech-tips/articles/oracle-rac-connection-string-rewrite

 

 

hope this helps.