netfilter buglog - May 2014 - [Bug 940] New: ip6tables-save output invalid rule when using D/SNPT

https://bugzilla.netfilter.org/show_bug.cgi?id=940

           Summary: ip6tables-save output invalid rule when using D/SNPT
           Product: iptables
           Version: 1.4.x
          Platform: x86_64
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ip6tables
        AssignedTo: netfilter-buglog at lists.netfilter.org
        ReportedBy: kjm.kznr+netfilter at gmail.com
   Estimated Hours: 0.0


Created attachment 442
  --> https://bugzilla.netfilter.org/attachment.cgi?id=442
fix invalid output patch

ip6tables-save command output invalid rules.

Steps to reproduce:
1. ip6tables -t mangle -A PREROUTING -d 2001:db8:0:1::/64 -i eth1 -j DNPT
--src-pfx 2001:db8:0:1::/64 --dst-pfx 2001:db8:ffff:2::/64 
2. ip6tables -t mangle -A POSTROUTING -s 2001:db8:ffff:2::/64  -j SNPT
--src-pfx 2001:db8:ffff:2::/64  --dst-pfx 2001:db8:0:1::/64 
3. ip6tables-save -t mangle

Actual Results:
  # ip6tables-save -t mangle
  # Generated by ip6tables-save v1.4.20 on Tue May 13 00:35:06 2014
  *mangle
  :PREROUTING ACCEPT [0:0]
  :INPUT ACCEPT [0:0]
  :FORWARD ACCEPT [0:0]
  :OUTPUT ACCEPT [0:0]
  :POSTROUTING ACCEPT [0:0]
  -A PREROUTING -d 2001:470:f9b0:a005::/64 -i eth1 -j DNPT--src-pfx
2001:470:f9b0:a005::/64 --dst-pfx fdde:3033:88c2:d005::/64 
  -A POSTROUTING -s fdde:3033:88c2:d005::/64 -j SNPT--src-pfx
fdde:3033:88c2:d005::/64 --dst-pfx 2001:470:f9b0:a005::/64 
  COMMIT

Expected Results:
  # Generated by ip6tables-save v1.4.20 on Wed May 14 01:36:03 2014
  *mangle
  :PREROUTING ACCEPT [0:0]
  :INPUT ACCEPT [0:0]
  :FORWARD ACCEPT [0:0]
  :OUTPUT ACCEPT [0:0]
  :POSTROUTING ACCEPT [0:0]
  -A PREROUTING -d 2001:470:f9b0:a005::/64 -i eth1 -j DNPT --src-pfx
2001:470:f9b0:a005::/64  --dst-pfx fdde:3033:88c2:d005::/64 
  -A POSTROUTING -s fdde:3033:88c2:d005::/64 -j SNPT --src-pfx
fdde:3033:88c2:d005::/64  --dst-pfx 2001:470:f9b0:a005::/64 
  COMMIT

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