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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - mapping IPv4 interval to IPv4 interval works for anonymous maps, but not for named maps"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1764#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - mapping IPv4 interval to IPv4 interval works for anonymous maps, but not for named maps"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1764">bug 1764</a>
from <span class="vcard"><a class="email" href="mailto:pablo@netfilter.org" title="Pablo Neira Ayuso <pablo@netfilter.org>"> <span class="fn">Pablo Neira Ayuso</span></a>
</span></b>
<pre>TLDR; Try this:
table ip t {
map m {
type ipv4_addr : interval ipv4_addr
flags interval
elements = { 192.0.2.0 : 198.51.100.0/24 }
}
chain c {
type nat hook postrouting priority srcnat; policy accept;
snat to ip saddr map @m persistent
}
}
I can post a patch to improve error reporting, to provide a hint.
===
Now looking further at this issue... Maybe this syntax can be revisited while
retaining backwards compatibility, I can propose this instead:
table ip t {
map m {
type ipv4_addr : ipv4_addr
flags interval : interval
elements = { 192.0.2.0/24 : 198.51.100.0/24 }
}
chain c {
type nat hook postrouting priority srcnat; policy accept;
snat to ip saddr map @m persistent
}
}
however, if lhs is singleton, then I will need syntatic sugar like this
'singleton' keyword (which does not exist):
table ip t {
map m {
type ipv4_addr : ipv4_addr
flags singleton : interval
elements = { 192.0.2.0 : 198.51.100.0/24 }
}
chain c {
type nat hook postrouting priority srcnat; policy accept;
snat to ip saddr map @m persistent
}
}
otherwise this would need to print:
flags : interval
because no flags in the left hand side (ie. singleton values only)
Another possibility is to push both interval flags to the type
type interval lipv4_addr : interval ipv4_addr
thanks.</pre>
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