Forum Discussion

nitass's avatar
nitass
Icon for Employee rankEmployee
Nov 26, 2011

HTTP_REQUEST_RELEASE and HTTP_RESPONSE_RELEASE

hello,

 

 

i have just noticed HTTP_REQUEST_RELEASE and HTTP_RESPONSE_RELEASE events in v11. does anybody have idea what different HTTP_REQUEST_SEND and HTTP_REQUEST_RELEASE are and what situation HTTP_REQUEST_RELEASE and HTTP_RESPONSE_RELEASE could be used (since HTTP_REQUEST_SEND and HTTP_RESPONSE may be applicable as well)?

 

 

[root@ve1100:Active] config cat /var/log/ltm

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule CLIENT_ACCEPTED:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule HTTP_REQUEST:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule SERVER_CONNECTED:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule HTTP_REQUEST_SEND:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule HTTP_REQUEST_RELEASE:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule HTTP_RESPONSE:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule HTTP_RESPONSE_RELEASE:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule CLIENT_CLOSED:

 

Nov 25 21:10:09 tmm info tmm[5633]: Rule /Common/myrule SERVER_CLOSED:

 

 

any suggestions are welcome.

 

 

thanks!
application delivery
dev
devops
iRules

3 Replies

Sort By
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Nov 28, 2011
    Hi Nitass,

     

     

    I think the main reason HTTP_REQUEST_RELEASE and HTTP_RESPONSE_RELEASE were added in v11 was to allow modification of HTTP headers after the plugin(s) like ASM, WA, etc, have processed the request and/or response.

     

     

    Aaron
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Nov 28, 2011
    Here's an example iRule for ASM showing the various events:

    
when CLIENT_ACCEPTED {
    log local0. "[IP::client_addr]:[TCP::client_port]: [virtual name] [IP::local_addr]:[TCP::local_port]"
}
when HTTP_REQUEST {
    log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::method] to [HTTP::host][HTTP::uri]"
}
when LB_SELECTED {
    log local0. "[IP::client_addr]:[TCP::client_port]: Selected: [LB::server]"
}
when LB_FAILED {
    log local0. "[IP::client_addr]:[TCP::client_port]: Failed: [LB::server]"
}
when HTTP_CLASS_SELECTED {
    log local0. "[IP::client_addr]:[TCP::client_port]: Selected [HTTP::class] class, ASM enabled: [HTTP::class asm]"
}
when HTTP_CLASS_FAILED {
    log local0. "[IP::client_addr]:[TCP::client_port]: No HTTP class match for [HTTP::uri]"
}
when ASM_REQUEST_VIOLATION {
    set x [ASM::violation_data]
    for {set i 0} { $i < 7 } {incr i} {
        switch $i {
            0 { log local0. "[IP::client_addr]:[TCP::client_port]: violation=[lindex $x $i]" }
            1 { log local0. "[IP::client_addr]:[TCP::client_port]: support_id=[lindex $x $i]" }
            2 { log local0. "[IP::client_addr]:[TCP::client_port]: web_application=[lindex $x $i]" }
            3 { log local0. "[IP::client_addr]:[TCP::client_port]: severity=[lindex $x $i]" }
            4 { log local0. "[IP::client_addr]:[TCP::client_port]: source_ip=[lindex $x $i]" }
            5 { log local0. "[IP::client_addr]:[TCP::client_port]: attack_type=[lindex $x $i]" }
            6 { log local0. "[IP::client_addr]:[TCP::client_port]: request_status=[lindex $x $i]" }
        }
    }
}
when ASM_REQUEST_BLOCKING {
    log local0. "[IP::client_addr]:[TCP::client_port]: Blocking"
}
when HTTP_REQUEST_SEND {
    log local0. "[IP::client_addr]:[TCP::client_port]: Sending to [IP::server_addr]:[TCP::server_port]"
}
when HTTP_REQUEST_RELEASE {
    log local0. "[IP::client_addr]:[TCP::client_port]: "
}
when SERVER_CONNECTED {
    log local0. "[IP::client_addr]:[TCP::client_port]: "
}
when HTTP_RESPONSE {
    log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::status] response"
}
when ASM_RESPONSE_VIOLATION {
    set x [ASM::violation_data]
    for {set i 0} { $i < 7 } {incr i} {
        switch $i {
            0 { log local0. "[IP::client_addr]:[TCP::client_port]: violation=[lindex $x $i]" }
            1 { log local0. "[IP::client_addr]:[TCP::client_port]: support_id=[lindex $x $i]" }
            2 { log local0. "[IP::client_addr]:[TCP::client_port]: web_application=[lindex $x $i]" }
            3 { log local0. "[IP::client_addr]:[TCP::client_port]: severity=[lindex $x $i]" }
            4 { log local0. "[IP::client_addr]:[TCP::client_port]: source_ip=[lindex $x $i]" }
            5 { log local0. "[IP::client_addr]:[TCP::client_port]: attack_type=[lindex $x $i]" }
            6 { log local0. "[IP::client_addr]:[TCP::client_port]: request_status=[lindex $x $i]" }
        }
    }
}
when HTTP_RESPONSE_RELEASE {
    log local0. "[IP::client_addr]:[TCP::client_port]: "
}
when CLIENT_CLOSED {
    log local0. "[IP::client_addr]:[TCP::client_port]: "
}

    And a request being blocked:

    
< CLIENT_ACCEPTED>: 10.1.0.111:53444: /Common/ltm_ve11_asm_http_vs 10.1.0.114:80
< HTTP_REQUEST>: 10.1.0.111:53444: GET to 10.1.0.114/test.exe
< HTTP_CLASS_SELECTED>: 10.1.0.111:53444: Selected /Common/www.example.com class, ASM enabled: 1
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: violation=VIOLATION_OBJ_LEN,VIOLATION_REQ_LEN,VIOLATION_OBJ_TYPE
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: support_id=10169066720958873606
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: web_application=/Common/www.example.com
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: severity=Critical
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: source_ip=10.1.0.111
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: attack_type=ATTACK_TYPE_BUFFER_OVERFLOW,ATTACK_TYPE_FORCEFUL_BROWSING
< ASM_REQUEST_VIOLATION>: 10.1.0.111:53444: request_status=blocked
< ASM_REQUEST_BLOCKING>: 10.1.0.111:53444: Blocking
< HTTP_RESPONSE_RELEASE>: 10.1.0.111:53444:
< CLIENT_CLOSED>: 10.1.0.111:53444:

    And a response being blocked:

    
< CLIENT_ACCEPTED>: 10.1.0.111:53567: /Common/ltm_ve11_asm_http_vs 10.1.0.114:80
< HTTP_REQUEST>: 10.1.0.111:53567: GET to 10.1.0.114/test.exe
< HTTP_CLASS_SELECTED>: 10.1.0.111:53567: Selected /Common/www.example.com class, ASM enabled: 1
< LB_SELECTED>: 10.1.0.111:53567: Selected: /Common/ubuntu_1ip_port0_pool 10.1.0.100 0
< SERVER_CONNECTED>: 10.1.0.111:53567:
< HTTP_REQUEST_SEND>: 10.1.0.111:53567: Sending to 10.1.0.100:80
< HTTP_REQUEST_RELEASE>: 10.1.0.111:53567:
< HTTP_RESPONSE>: 10.1.0.111:53567: 404 response
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: violation=VIOLATION_HTTP_STATUS_IN_RESPONSE
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: support_id=10169066720958873618
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: web_application=/Common/www.example.com
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: severity=Informational
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: source_ip=10.1.0.111
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: attack_type=
< ASM_RESPONSE_VIOLATION>: 10.1.0.111:53567: request_status=blocked
< HTTP_RESPONSE_RELEASE>: 10.1.0.111:53567:
< CLIENT_CLOSED>: 10.1.0.111:53567:

    Aaron