diff options
| author | Phil Pennock <pdp@exim.org> | 2010-06-05 23:50:18 +0000 |
|---|---|---|
| committer | Phil Pennock <pdp@exim.org> | 2010-06-05 23:50:18 +0000 |
| commit | 83e029d54f2edd11b1706609832693c9540f7783 (patch) | |
| tree | 37474ff42b06383231b5a7fec9cb0187509b42c5 /doc/doc-docbook | |
| parent | 22380b862c5f5b1cdc119e763b3ab8beb89723f3 (diff) | |
New expansion operator: reverse_ip
Diffstat (limited to 'doc/doc-docbook')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index 98048c6bc..003ae6db8 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -1,4 +1,4 @@ -. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.78 2010/06/05 21:42:53 pdp Exp $ +. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.79 2010/06/05 23:50:18 pdp Exp $ . . ///////////////////////////////////////////////////////////////////////////// . This is the primary source of the Exim Manual. It is an xfpt document that is @@ -9615,6 +9615,21 @@ srandomdev() or srandom(), or a custom implementation even weaker than random(). +.vitem &*${reverse_ip:*&<&'ipaddr'&>&*}*& +.cindex "expansion" "IP address" +This operator reverses an IP address; for IPv4 addresses, the result is in +dotted-quad decimal form, while for IPv6 addreses the result is in +dotted-nibble hexadecimal form. In both cases, this is the "natural" form +for DNS. For example, +.code +${reverse_ip:192.0.2.4} and ${reverse_ip:2001:0db8:c42:9:1:abcd:192.0.2.3} +.endd +returns +.code +4.2.0.192 and 3.0.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2 +.endd + + .vitem &*${rfc2047:*&<&'string'&>&*}*& .cindex "expansion" "RFC 2047" .cindex "RFC 2047" "expansion operator" |