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)

-- Export a module:may() that works on Prosody 0.12 and earlier
-- (i.e. backed by is_admin).

-- This API is safe because Prosody 0.12 and earlier do not support
-- per-session roles - all authorization is based on JID alone. It is not
-- safe on versions that support per-session authorization.

module:set_global();

local moduleapi = require "core.moduleapi";

-- If module.may already exists, abort
if moduleapi.may then return; end

local jid_split = require "util.jid".split;
local um_is_admin = require "core.usermanager".is_admin;

local function get_jid_role_name(jid, host)
	if um_is_admin(jid, "*") then
		return "prosody:operator";
	elseif um_is_admin(jid, host) then
		return "prosody:admin";
	end
	return nil;
end

local function get_user_role_name(username, host)
	return get_jid_role_name(username.."@"..host, host);
end

-- permissions[host][role_name][permission_name] = is_permitted
local permissions = {};

local role_inheritance = {
	["prosody:operator"] = "prosody:admin";
	["prosody:admin"] = "prosody:member";
	["prosody:member"] = "prosody:registered";
	["prosody:registered"] = "prosody:guest";

	-- COMPAT
	["prosody:user"] = "prosody:registered";
};

local function role_may(host, role_name, permission)
	local host_roles = permissions[host];
	if not host_roles then
		return false;
	end
	local role_permissions = host_roles[role_name];
	if not role_permissions then
		return false;
	end
	if role_permissions[permission] then
		return true;
	end
	local next_role = role_inheritance[role_name];
	if not next_role then
		return false;
	end
	return role_may(host, next_role, permission);
end

function moduleapi.may(self, action, context)
	if action:byte(1) == 58 then -- action begins with ':'
		action = self.name..action; -- prepend module name
	end
	if type(context) == "string" then -- check JID permissions
		local role;
		local node, host = jid_split(context);
		if host == self.host then
			role = get_user_role_name(node, self.host);
		else
			role = get_jid_role_name(context, self.host);
		end
		if not role then
			self:log("debug", "Access denied: JID <%s> may not %s (no role found)", context, action);
			return false;
		end

		local permit = role_may(self.host, role, action);
		if not permit then
			self:log("debug", "Access denied: JID <%s> may not %s (not permitted by role %s)", context, action, role.name);
		end
		return permit;
	end

	local session = context.origin or context.session;
	if type(session) ~= "table" then
		error("Unable to identify actor session from context");
	end
	if session.type == "s2sin" or (session.type == "c2s" and session.host ~= self.host) then
		local actor_jid = context.stanza.attr.from;
		local role_name = get_jid_role_name(actor_jid);
		if not role_name then
			self:log("debug", "Access denied: JID <%s> may not %s (no role found)", actor_jid, action);
			return false;
		end
		local permit = role_may(self.host, role_name, action, context);
		if not permit then
			self:log("debug", "Access denied: JID <%s> may not %s (not permitted by role %s)", actor_jid, action, role_name);
		end
		return permit;
	end
end

function moduleapi.default_permission(self, role_name, permission)
	local p = permissions[self.host];
	if not p then
		p = {};
		permissions[self.host] = p;
	end
	local r = p[role_name];
	if not r then
		r = {};
		p[role_name] = r;
	end
	r[permission] = true;
end

function moduleapi.default_permissions(self, role_name, permission_list)
	for _, permission in ipairs(permission_list) do
		self:default_permission(role_name, permission);
	end
end

function module.add_host(host_module)
	permissions[host_module.host] = {};
	function host_module.unload()
		permissions[host_module.host] = nil;
	end
end