Accessing TCP Options from iRules

I’ve written several articles on the TCP profile and enjoy digging into TCP.  It’s a beast, and I am constantly re-learning the inner workings.  Still etched in my visual memory map, however, is the ...
Published Mar 25, 2011
Version 1.0
application delivery
BIG-IP
dev
devops
iRules
news
tech tip
MegaZone's avatar
MegaZone
Icon for SIRT rankSIRT
Jun 25, 2020

Yes, you're correct:

---

} else {

set optaddr [IP::addr parse -ipv4 $opt28 1]

if { [catch {IP::addr $x mask 255.255.255.255}] } {

log local0. "$optaddr is not a valid address"

snat automap

---

 

That $x should be $optaddr in this example.

 

It isn't clear from https://clouddocs.f5.com/api/irules/IP__addr.html if it throws an exception, and I'm not sure offhand - probably something to check.