From 94257c3e4be86d2006ed37714a6d902ccb8aeb1a Mon Sep 17 00:00:00 2001
From: Badlop <badlop@process-one.net>
Date: Mon, 8 Mar 2010 13:58:53 +0100
Subject: [PATCH] Implement XEP-0279: Server IP Check (thanks to Karim
 Gemayel)(EJAB-1205)

---
 src/mod_sic.erl | 94 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/mod_sic.erl

diff --git a/src/mod_sic.erl b/src/mod_sic.erl
new file mode 100644
index 000000000..c8488262f
--- /dev/null
+++ b/src/mod_sic.erl
@@ -0,0 +1,94 @@
+%%%----------------------------------------------------------------------
+%%% File    : mod_sic.erl
+%%% Author  : Karim Gemayel <karim.gemayel@process-one.net>
+%%% Purpose : XEP-0279 Server IP Check
+%%% Created : 6 Mar 2010 by Karim Gemayel <karim.gemayel@process-one.net>
+%%%
+%%%
+%%% ejabberd, Copyright (C) 2002-2010   ProcessOne
+%%%
+%%% This program is free software; you can redistribute it and/or
+%%% modify it under the terms of the GNU General Public License as
+%%% published by the Free Software Foundation; either version 2 of the
+%%% License, or (at your option) any later version.
+%%%
+%%% This program is distributed in the hope that it will be useful,
+%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
+%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+%%% General Public License for more details.
+%%%
+%%% You should have received a copy of the GNU General Public License
+%%% along with this program; if not, write to the Free Software
+%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+%%% 02111-1307 USA
+%%%
+%%%----------------------------------------------------------------------
+
+-module(mod_sic).
+-author('karim.gemayel@process-one.net').
+
+-behaviour(gen_mod).
+
+-export([start/2,
+	 stop/1,
+	 process_local_iq/3,
+	 process_sm_iq/3]).
+
+-include_lib("exmpp/include/exmpp.hrl").
+-include_lib("exmpp/include/internal/exmpp_xmpp.hrl").
+-include("ejabberd.hrl").
+
+start(Host, Opts) ->
+    HostB = list_to_binary(Host),
+    IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
+    mod_disco:register_feature(Host, ?NS_SIC_0_s),
+    gen_iq_handler:add_iq_handler(ejabberd_local, HostB, ?NS_SIC_0_s,
+				  ?MODULE, process_local_iq, IQDisc),
+    gen_iq_handler:add_iq_handler(ejabberd_sm, HostB, ?NS_SIC_0_s,
+				  ?MODULE, process_sm_iq, IQDisc).
+
+stop(Host) ->
+    HostB = list_to_binary(Host),
+    mod_disco:unregister_feature(Host, ?NS_SIC_0_s),
+    gen_iq_handler:remove_iq_handler(ejabberd_local, HostB, ?NS_SIC_0_s),
+    gen_iq_handler:remove_iq_handler(ejabberd_sm, HostB, ?NS_SIC_0_s).
+
+
+process_local_iq(From, _To, #iq{type = 'get'} = IQ) ->
+    get_ip(From, IQ);
+
+process_local_iq(_From, _To, #iq{type = 'set'} = IQ) ->
+    exmpp_iq:error(IQ, 'not-allowed');
+
+process_local_iq(_From, _To, #iq{} = IQ) ->
+    exmpp_iq:error(IQ, 'unexpected-request').
+
+
+process_sm_iq(
+  #jid{prep_node = Node, prep_domain = Domain} = From,
+  #jid{prep_node = Node, prep_domain = Domain} = _To,
+  #iq{type = 'get'} = IQ) ->
+    get_ip(From, IQ);
+
+process_sm_iq(_From, _To, #iq{type = 'get'} = IQ) ->
+    exmpp_iq:error(IQ, 'forbidden');
+
+process_sm_iq(_From, _To, #iq{type = 'set'} = IQ) ->
+    exmpp_iq:error(IQ, 'not-allowed');
+
+process_sm_iq(_From, _To, #iq{} = IQ) ->
+    exmpp_iq:error(IQ, 'unexpected-request').
+
+get_ip(From, IQ) ->
+    case ejabberd_sm:get_user_ip(From) of
+	{IP, _} when is_tuple(IP) ->
+	    exmpp_iq:result(IQ,
+			    #xmlel{
+			      name = 'ip',
+			      ns = ?NS_SIC_0_s,
+			      children = [?XMLCDATA(list_to_binary(
+						      inet_parse:ntoa(IP)))]
+			     });
+	_ ->
+	    exmpp_iq:error(IQ, 'internal-server-error')
+    end.