Scan command and variables in a SSL transaction

I'm trying to capture some client IP/SSL cipher information as well as a 23 character string of text that will be divided up into two identifiers.

are the 23 chars in http request? if yes, isn't it easier to just use http_request event? ssl::payload is http request.

e.g.

// config

root@(ve13a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.24.10:443
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        clientssl {
            context clientside
        }
        tcp { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    translate-address enabled
    translate-port enabled
    vs-index 4
}
root@(ve13a)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm rule qux
ltm rule qux {
when CLIENT_ACCEPTED {
  log local0. "SSL_CUSTOM: Connection of Client Source IP: [IP::client_addr]:[TCP::client_port]<-->[virtual name]<-->[LB::server]"
}
when CLIENTSSL_HANDSHAKE {
  if { [SSL::cipher bits] > 0 } then {
    log local0. "Client: [IP::client_addr] is using [SSL::cipher version]. SSL Cipher:[SSL::cipher name]. Virtual:[virtual]. SSL Profile:[PROFILE::clientssl name]."
    SSL::collect
  }
}
when CLIENTSSL_DATA {
  log local0. [SSL::payload]
  SSL::release
}
}

// client

 curl -ik https://172.28.24.10
HTTP/1.1 200 OK
Date: Wed, 27 Dec 2017 01:06:34 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 15 Apr 2016 03:55:49 GMT
ETag: "418e44-6a-fc825b40"
Accept-Ranges: bytes
Content-Length: 106
Content-Type: text/html; charset=UTF-8






This is 101 host.




// log

[root@ve13a:Active:In Sync] config  tail -f /var/log/ltm
Dec 27 08:56:49 ve13a info tmm[17969]: Rule /Common/qux : SSL_CUSTOM: Connection of Client Source IP: 172.28.24.1:32806<-->/Common/bar<-->/Common/foo 0
Dec 27 08:56:49 ve13a info tmm[17969]: Rule /Common/qux : Client: 172.28.24.1 is using TLSv1.2. SSL Cipher:ECDHE-RSA-AES128-GCM-SHA256. Virtual:/Common/bar. SSL Profile:/Common/clientssl.
Dec 27 08:56:49 ve13a info tmm[17969]: Rule /Common/qux : GET / HTTP/1.1  User-Agent: curl/7.29.0  Host: 172.28.24.10  Accept: */*

by the way, scan command returns number of conversions performed (not string that matches a conversion specifier). in short, combo variable should be after the scan command.

e.g.

scan [SSL::payload] {[0-9]{8}[0-9]{15}){1}} combo

scan