iRule Syntax

A direct mapping would be something like this (using elseif's instead of nested if's):

when HTTP_REQUEST {
  if { [HTTP::header "User-Agent"] contains "test" } {
    pool bot
  } elseif { [IP::addr "[IP::client_addr]/24" equals "1.1.1.0/24"] } {  
    pool test
  } elseif { [IP::addr "[IP::client_addr]" equals "2.2.2.2"] } {
    pool test
  } elseif { [IP::addr "[IP::client_addr]" equals "3.3.3.3"] } {
    pool test
  } elseif { [IP::addr "[IP::client_addr]" equals "4.4.4.4"] } {
    discard
  } elseif { [HTTP::header "User-Agent"] contains "test2" } {
    pool test
  } elseif { [HTTP::header "User-Agent"] contains "test3" } {
    pool test
  } elseif { [HTTP::header "User-Agent"] contains "test.test.com" } {
    pool test
  } else {
    pool otherpool
  }
}

You could probably optimize this a bit by using data groups in combination with the matchclass command to combine a couple of those elseif's into a single. Right now the rule isn't too long, but if there were more User-Agent conditions tested all resulting in the same pool command then a matchclass approach might be more manageable.

-Joe