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authorKim Alvefur <zash@zash.se>2014-09-09 14:42:10 +0200
committerKim Alvefur <zash@zash.se>2014-09-09 14:42:10 +0200
commitac223b21754ddbb046251994cdcc390ab1573733 (patch)
treeb5ecf209c4c7694e62191cef0ff330f8ece1da5d /core/stanza_router.lua
parent5035900778c4e2fa078511c5c38754da5a834ff1 (diff)
downloadprosody-ac223b21754ddbb046251994cdcc390ab1573733.tar.gz
prosody-ac223b21754ddbb046251994cdcc390ab1573733.zip
core.stanza_router: Stricter validation of stanzas
Diffstat (limited to 'core/stanza_router.lua')
-rw-r--r--core/stanza_router.lua45
1 files changed, 24 insertions, 21 deletions
diff --git a/core/stanza_router.lua b/core/stanza_router.lua
index 94753678..bf5b11bc 100644
--- a/core/stanza_router.lua
+++ b/core/stanza_router.lua
@@ -29,24 +29,25 @@ deprecated_warning"core_post_stanza";
deprecated_warning"core_process_stanza";
deprecated_warning"core_route_stanza";
+local valid_stanzas = { message = true, presence = true, iq = true };
local function handle_unhandled_stanza(host, origin, stanza)
local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns or "jabber:client", origin.type;
- if name == "iq" and xmlns == "jabber:client" then
- if stanza.attr.type == "get" or stanza.attr.type == "set" then
+ if xmlns == "jabber:client" and valid_stanzas[name] then
+ -- A normal stanza
+ local st_type = stanza.attr.type;
+ if st_type == "error" or (name == "iq" and st_type == "result") then
+ log("debug", "Discarding %s from %s of type: %s", name, origin_type, st_type or '<nil>');
+ return;
+ end
+ if name == "iq" and (st_type == "get" or st_type == "set") and stanza.tags[1] then
xmlns = stanza.tags[1].attr.xmlns or "jabber:client";
- log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
- else
- log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type);
- return true;
end
- end
- if stanza.attr.xmlns == nil and origin.send then
- log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it
- if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
+ log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin_type, name, xmlns);
+ if origin.send then
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
elseif not((name == "features" or name == "error") and xmlns == "http://etherx.jabber.org/streams") then -- FIXME remove check once we handle S2S features
- log("warn", "Unhandled %s stream element or stanza: %s; xmlns=%s: %s", origin.type, stanza.name, xmlns, tostring(stanza)); -- we didn't handle it
+ log("warn", "Unhandled %s stream element or stanza: %s; xmlns=%s: %s", origin_type, name, xmlns, tostring(stanza)); -- we didn't handle it
origin:close("unsupported-stanza-type");
end
end
@@ -55,19 +56,21 @@ local iq_types = { set=true, get=true, result=true, error=true };
function core_process_stanza(origin, stanza)
(origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
- -- TODO verify validity of stanza (as well as JID validity)
- if stanza.attr.type == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
- if stanza.name == "iq" then
- if not stanza.attr.id then stanza.attr.id = ""; end -- COMPAT Jabiru doesn't send the id attribute on roster requests
- if not iq_types[stanza.attr.type] or ((stanza.attr.type == "set" or stanza.attr.type == "get") and (#stanza.tags ~= 1)) then
- origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid IQ type or incorrect number of children"));
- return;
+ if origin.type == "c2s" and not stanza.attr.xmlns then
+ local name, st_type = stanza.name, stanza.attr.type;
+ if st_type == "error" and #stanza.tags == 0 then
+ return handle_unhandled_stanza(origin.host, origin, stanza);
+ end
+ if name == "iq" then
+ if not stanza.attr.id then stanza.attr.id = ""; end -- COMPAT Jabiru doesn't send the id attribute on roster requests
+ if not iq_types[st_type] or (st_type ~= "result" and #stanza.tags ~= 1) then
+ origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid IQ type or incorrect number of children"));
+ return;
+ end
end
- end
- if origin.type == "c2s" and not stanza.attr.xmlns then
if not origin.full_jid
- and not(stanza.name == "iq" and stanza.attr.type == "set" and stanza.tags[1] and stanza.tags[1].name == "bind"
+ and not(name == "iq" and st_type == "set" and stanza.tags[1] and stanza.tags[1].name == "bind"
and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
-- authenticated client isn't bound and current stanza is not a bind request
if stanza.attr.type ~= "result" and stanza.attr.type ~= "error" then