kern/93825: pf reply-to doesn't work

[Vlad GALU]

>Number:         93825
>Category:       kern
>Synopsis:       pf reply-to doesn't work
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Feb 25 09:50:04 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Vlad GALU
>Release:        6.1-PRERELEASE
>Organization:
>Environment:
FreeBSD snakepit.afraid.org 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #0: Mon Feb  6 12:14:23 EET 2006     root at snakepit.afraid.org:/usr/src/sys/i386/compile/SNAKEPIT  i386

>Description:
This is a multihomed machine. I expect replies to requests that came on one interface to leave the machine on the same interface. This doesn't happen.
>How-To-Repeat:
Assuming you have packets coming in through $local_if, and the following ruleset:

pass in quick on $local_if reply-to ($local_if $local_gw) \
        inet proto tcp from any to ($local_if) \
        port = 80 flags S/SA keep state

This rule does create state, but the packets leave the machine through the interface the default route is connected to, which is not $local_if.
>Fix:
              
>Release-Note:
>Audit-Trail:
>Unformatted: