mod_voipms: New Module to send and receive SMS/MMS via VoIP.ms APIs. diff --git a/mod_voipms/README.md b/mod_voipms/README.md new file mode 100644 --- /dev/null +++ b/mod_voipms/README.md @@ -0,0 +1,51 @@ +--- +labels: +- 'Stage-Alpha' +- 'Type-Web' +summary: Send and receive SMS/MMS via VoIP.ms APIs. +rockspec: + build: + modules: + mod_voipms: mod_voipms.lua +... + +Introduction +============ + +This is a Prosody module to map JIDs to DIDs on VoIP.ms and support sending/receiving SMS/MMS. + +Configuration +============= + +| option | type | default | +|-----------------------|--------|---------| +| voipms\_api\_username | string | nil | +| voipms\_api\_password | string | nil | +| voipms\_query\_key | string | nil | +| voipms\_jid\_map | table | nil | +``` +VirtualHost "sms.example.com" +modules_enabled = { + "voipms"; +} +voipms_api_username = john@example.com -- E-mail registered with VoIP.ms +voipms_api_password = abcd1234 -- API password configured in VoIP.ms +voipms_query_key = some_query_key -- query param 'key' part of your URL callback +voipms_jid_map = { + ["your_jid@your_domain.com"] = "+1234567890" +} +``` + +HTTP +==== + +The module is served on Prosody's default HTTP ports at the path /voipms. More details on configuring HTTP modules in Prosody can be found in the HTTP documentation. + +VoIP.ms Webhook URL +=================== + +This module receives the VoIP.ms Webhook URL (POST) at the /voipms endpoint. It uses the sendSMS/sendMMS GET methods against the VoIP.ms APIs. This is an example webhook to use in VoIP.ms: + +``` +https://sms.example.com/voipms?key=some_query_key +``` diff --git a/mod_voipms/mod_voipms.lua b/mod_voipms/mod_voipms.lua new file mode 100644 --- /dev/null +++ b/mod_voipms/mod_voipms.lua @@ -0,0 +1,166 @@ +local http = require "net.http" +local json = require "util.json" +local st = require "util.stanza" + +local api_username = module:get_option_string("voipms_api_username") +local api_password = module:get_option_string("voipms_api_password") +local query_key = module:get_option("voipms_query_key") +local jid_map = module:get_option("voipms_jid_map") or {} +local rest_endpoint = "https://voip.ms/api/v1/rest.php" + +if not api_username or not api_password or not query_key then + module:log("error", "Missing required config values (voipms_api_username, voipms_api_password, voipms_query_key)") + return +end + +module:depends("http") + +local function normalize_number(num) + if not num then return nil end + if num:sub(1, 1) ~= "+" then + return "+1" .. num + end + return num +end + +local function extract_query_key(event) + return (event.request.url.query or ""):match("key=([^&]+)") +end + +module:provides("http", { + route = { + ["POST"] = function(event) + local req = event.request + local body = req.body or "" + + if extract_query_key(event) ~= query_key then + module:log("warn", "Unauthorized webhook: missing or invalid key") + return { status_code = 403 } + end + + local json_payload, err = json.decode(body) + if not json_payload then + module:log("warn", "Invalid JSON: %s", err or "unknown error") + return { status_code = 400 } + end + + local payload = json_payload.data and json_payload.data.payload + if not payload then + module:log("warn", "Missing payload in JSON") + return { status_code = 400 } + end + + local from = payload.from and payload.from.phone_number + local to_list = payload.to or {} + local to = #to_list > 0 and to_list[1].phone_number or nil + + if not from or not to then + module:log("warn", "Missing phone numbers (from: %s, to: %s)", tostring(from), tostring(to)) + return { status_code = 400 } + end + + local normalized_to = normalize_number(to) + local target_jid = nil + + for jid, did in pairs(jid_map) do + if normalize_number(did) == normalized_to then + target_jid = jid + break + end + end + + if not target_jid then + module:log("warn", "No JID mapping for DID %s", normalized_to) + return { status_code = 404 } + end + + local normalized_from = normalize_number(from) + local message_text = payload.text or "" + + local message = st.message({ + from = normalized_from .. "@" .. module.host, + to = target_jid, + type = "chat" + }):tag("body"):text(message_text):up() + + if payload.media and #payload.media > 0 then + for _, media_item in ipairs(payload.media) do + if media_item.url then + message_text = message_text .. "\n" .. media_item.url + message:tag("x", { xmlns = "jabber:x:oob" }) + :tag("url"):text(media_item.url):up():up() + end + end + end + + module:send(message) + module:log("info", "Delivered SMS from %s to %s", normalized_from, target_jid) + + return { status_code = 204 } + end + } +}) + +module:hook("message/bare", function(event) + local stanza = event.stanza + if stanza.attr.type ~= "chat" then return end + + local from_jid = stanza.attr.from + local to_jid = stanza.attr.to + local body = stanza:get_child_text("body") + if not body or body == "" then return end + + local from_number = jid_map[from_jid] + if not from_number then + module:log("warn", "No DID mapping for JID %s", from_jid) + return + end + + local to_number = to_jid:match("^([^@]+)") + if not to_number then + module:log("warn", "Malformed JID in message.to: %s", to_jid) + return + end + + to_number = normalize_number(to_number) + + local media_urls = {} + for line in body:gmatch("[^\r\n]+") do + if line:match("^https?://") then + table.insert(media_urls, line) + end + end + + local method = (#media_urls > 0) and "sendMMS" or "sendSMS" + local query = { + api_username = api_username, + api_password = api_password, + method = method, + did = from_number, + dst = to_number, + message = body + } + + if method == "sendMMS" then + for i, url in ipairs(media_urls) do + query["media_url[" .. (i - 1) .. "]"] = url + end + end + + local query_str = http.formencode(query) + + http.request(rest_endpoint .. "?" .. query_str, { + method = "GET"; + }, function(response_body, code) + if code == 200 then + local resp, err = json.decode(response_body) + if not resp or resp.status ~= "success" then + module:log("error", "Failed to send %s: %s", method, err or (resp and resp.status) or "unknown") + else + module:log("info", "Sent %s from %s to %s", method, from_number, to_number) + end + else + module:log("error", "HTTP error sending %s: code %s", method, tostring(code)) + end + end) +end)

local st = require "util.stanza";
local jid_bare = require "util.jid".bare;

-- advertise disco features
module:add_feature("urn:xmpp:sift:1");

-- supported features
module:add_feature("urn:xmpp:sift:stanzas:iq");
module:add_feature("urn:xmpp:sift:stanzas:message");
module:add_feature("urn:xmpp:sift:stanzas:presence");
module:add_feature("urn:xmpp:sift:recipients:all");
module:add_feature("urn:xmpp:sift:senders:all");

-- allowed values of 'sender' and 'recipient' attributes
local senders = {
	["all"] = true;
	["local"] = true;
	["others"] = true;
	["remote"] = true;
	["self"] = true;
};
local recipients = {
	["all"] = true;
	["bare"] = true;
	["full"] = true;
};

-- this function converts a <message/>, <presence/> or <iq/> element in
-- the SIFT namespace into a hashtable, for easy lookup
local function to_hashtable(element)
	if element ~= nil then
		local hash = {};
		-- make sure the sender and recipient attributes has a valid value
		hash.sender = element.attr.sender or "all";
		if not senders[hash.sender] then return false; end -- bad value, returning false
		hash.recipient = element.attr.recipient or "all";
		if not recipients[hash.recipient] then return false; end -- bad value, returning false
		-- next we loop over all <allow/> elements
		for _, tag in ipairs(element) do
			if tag.name == "allow" and tag.attr.xmlns == "urn:xmpp:sift:1" then
				-- make sure the element is valid
				if not tag.attr.name or not tag.attr.ns then return false; end -- missing required attributes, returning false
				hash[tag.attr.ns.."|"..tag.attr.name] = true;
				hash.allowed = true; -- just a flag indicating we have some elements allowed
			end
		end
		return hash;
	end
end

local data = {}; -- table with all our data

-- handle SIFT set
module:hook("iq/self/urn:xmpp:sift:1:sift", function(event)
	local origin, stanza = event.origin, event.stanza;
	if stanza.attr.type == "set" then
		local sifttag = stanza.tags[1]; -- <sift/>

		-- first, get the elements we are interested in
		local message = sifttag:get_child("message");
		local presence = sifttag:get_child("presence");
		local iq = sifttag:get_child("iq");

		-- for quick lookup, convert the elements into hashtables
		message = to_hashtable(message);
		presence = to_hashtable(presence);
		iq = to_hashtable(iq);

		-- make sure elements were valid
		if message == false or presence == false or iq == false then
			origin.send(st.error_reply(stanza, "modify", "bad-request"));
			return true;
		end

		local existing = data[origin.full_jid] or {}; -- get existing data, if any
		data[origin.full_jid] = { presence = presence, message = message, iq = iq }; -- store new data

		origin.send(st.reply(stanza)); -- send back IQ result

		if not existing.presence and not origin.presence and presence then
			-- TODO send probes
		end
		return true;
	end
end);

-- handle user disconnect
module:hook("resource-unbind", function(event)
	data[event.session.full_jid] = nil; -- discard data
end);

-- IQ handler
module:hook("iq/full", function(event)
	local origin, stanza = event.origin, event.stanza;
	local siftdata = data[stanza.attr.to];
	if stanza.attr.type == "get" or stanza.attr.type == "set" then
		if siftdata and siftdata.iq then -- we seem to have an IQ filter
			local tag = stanza.tags[1]; -- the IQ child
			if not siftdata.iq[(tag.attr.xmlns or "jabber:client").."|"..tag.name] then
				-- element not allowed; sending back generic error
				origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
				return true;
			end
		end
	end
end, 50);

-- Message to full JID handler
module:hook("message/full", function(event)
	local origin, stanza = event.origin, event.stanza;
	local siftdata = data[stanza.attr.to];
	if siftdata and siftdata.message then -- we seem to have an message filter
		local allowed = false;
		for _, childtag in ipairs(stanza.tags) do
			if siftdata.message[(childtag.attr.xmlns or "jabber:client").."|"..childtag.name] then
				allowed = true;
			end
		end
		if not allowed then
			-- element not allowed; sending back generic error
			origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
			-- FIXME maybe send to offline storage
			return true;
		end
	end
end, 50);

-- Message to bare JID handler
module:hook("message/bare", function(event)
	local origin, stanza = event.origin, event.stanza;
	local user = bare_sessions[jid_bare(stanza.attr.to)];
	local allowed = false;
	for _, session in pairs(user and user.sessions or {}) do
		local siftdata = data[session.full_jid];
		if siftdata and siftdata.message then -- we seem to have an message filter
			for _, childtag in ipairs(stanza.tags) do
				if siftdata.message[(childtag.attr.xmlns or "jabber:client").."|"..childtag.name] then
					allowed = true;
				end
			end
		else
			allowed = true;
		end
	end
	if user and not allowed then
		-- element not allowed; sending back generic error
		origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
		-- FIXME maybe send to offline storage
		return true;
	end
end, 50);

-- Presence to full JID handler
module:hook("presence/full", function(event)
	local origin, stanza = event.origin, event.stanza;
	local siftdata = data[stanza.attr.to];
	if siftdata and siftdata.presence then -- we seem to have an presence filter
		local allowed = false;
		for _, childtag in ipairs(stanza.tags) do
			if siftdata.presence[(childtag.attr.xmlns or "jabber:client").."|"..childtag.name] then
				allowed = true;
			end
		end
		if not allowed then
			-- element not allowed; sending back generic error
			--origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
			return true;
		end
	end
end, 50);

-- Presence to bare JID handler
module:hook("presence/bare", function(event)
	local origin, stanza = event.origin, event.stanza;
	local user = bare_sessions[jid_bare(stanza.attr.to)];
	local allowed = false;
	for _, session in pairs(user and user.sessions or {}) do
		local siftdata = data[session.full_jid];
		if siftdata and siftdata.presence then -- we seem to have an presence filter
			for _, childtag in ipairs(stanza.tags) do
				if siftdata.presence[(childtag.attr.xmlns or "jabber:client").."|"..childtag.name] then
					allowed = true;
				end
			end
		else
			allowed = true;
		end
	end
	if user and not allowed then
		-- element not allowed; sending back generic error
		--origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
		return true;
	end
end, 50);