@@ -0,0 +1,175 @@
+use std::collections::{HashMap, BTreeMap};
+use std::collections::hash_map::Entry;
+use std::convert::TryFrom;
+use std::sync::{Mutex, Arc};
+
+use plugin::PluginProxy;
+use event::{Event, Priority, Propagation};
+use jid::Jid;
+
+use plugins::stanza::Iq;
+use xmpp_parsers::iq::{IqType, IqPayload};
+use xmpp_parsers::ibb::{IBB, Stanza};
+use xmpp_parsers::stanza_error::{StanzaError, ErrorType, DefinedCondition};
+
+#[derive(Debug, Clone)]
+pub struct Session {
+ stanza: Stanza,
+ block_size: u16,
+ cur_seq: u16,
+}
+
+#[derive(Debug)]
+pub struct IbbOpen {
+ pub session: Session,
+}
+
+#[derive(Debug)]
+pub struct IbbData {
+ pub session: Session,
+ pub data: Vec<u8>,
+}
+
+#[derive(Debug)]
+pub struct IbbClose {
+ pub session: Session,
+}
+
+impl Event for IbbOpen {}
+impl Event for IbbData {}
+impl Event for IbbClose {}
+
+fn generate_error(type_: ErrorType, defined_condition: DefinedCondition, text: &str) -> StanzaError {
+ StanzaError {
+ type_: type_,
+ defined_condition: defined_condition,
+ texts: {
+ let mut texts = BTreeMap::new();
+ texts.insert(String::new(), String::from(text));
+ texts
+ },
+ by: None,
+ other: None,
+ }
+}
+
+pub struct IbbPlugin {
+ proxy: PluginProxy,
+ sessions: Arc<Mutex<HashMap<(Jid, String), Session>>>,
+}
+
+impl IbbPlugin {
+ pub fn new() -> IbbPlugin {
+ IbbPlugin {
+ proxy: PluginProxy::new(),
+ sessions: Arc::new(Mutex::new(HashMap::new())),
+ }
+ }
+
+ fn handle_ibb(&self, from: Jid, ibb: IBB) -> Result<(), StanzaError> {
+ let mut sessions = self.sessions.lock().unwrap();
+ match ibb {
+ IBB::Open { block_size, sid, stanza } => {
+ match sessions.entry((from.clone(), sid.clone())) {
+ Entry::Vacant(_) => Ok(()),
+ Entry::Occupied(_) => Err(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::NotAcceptable,
+ "This session is already open."
+ )),
+ }?;
+ let session = Session {
+ stanza,
+ block_size,
+ cur_seq: 65535u16,
+ };
+ sessions.insert((from, sid), session.clone());
+ self.proxy.dispatch(IbbOpen {
+ session: session,
+ });
+ },
+ IBB::Data { seq, sid, data } => {
+ let entry = match sessions.entry((from, sid)) {
+ Entry::Occupied(entry) => Ok(entry),
+ Entry::Vacant(_) => Err(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::ItemNotFound,
+ "This session doesn’t exist."
+ )),
+ }?;
+ let mut session = entry.into_mut();
+ if session.stanza != Stanza::Iq {
+ return Err(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::NotAcceptable,
+ "Wrong stanza type."
+ ))
+ }
+ let cur_seq = session.cur_seq.wrapping_add(1);
+ if seq != cur_seq {
+ return Err(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::NotAcceptable,
+ "Wrong seq number."
+ ))
+ }
+ session.cur_seq = cur_seq;
+ self.proxy.dispatch(IbbData {
+ session: session.clone(),
+ data,
+ });
+ },
+ IBB::Close { sid } => {
+ let entry = match sessions.entry((from, sid)) {
+ Entry::Occupied(entry) => Ok(entry),
+ Entry::Vacant(_) => Err(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::ItemNotFound,
+ "This session doesn’t exist."
+ )),
+ }?;
+ let session = entry.remove();
+ self.proxy.dispatch(IbbClose {
+ session,
+ });
+ },
+ }
+ Ok(())
+ }
+
+ fn handle_iq(&self, iq: &Iq) -> Propagation {
+ let iq = iq.clone();
+ if let IqType::Set(payload) = iq.payload {
+ let from = iq.from.unwrap();
+ let id = iq.id.unwrap();
+ // TODO: use an intermediate plugin to parse this payload.
+ let payload = match IqPayload::try_from(payload) {
+ Ok(IqPayload::IBB(ibb)) => {
+ match self.handle_ibb(from.clone(), ibb) {
+ Ok(_) => IqType::Result(None),
+ Err(error) => IqType::Error(error),
+ }
+ },
+ Err(err) => IqType::Error(generate_error(
+ ErrorType::Cancel,
+ DefinedCondition::NotAcceptable,
+ format!("{:?}", err).as_ref()
+ )),
+ Ok(_) => return Propagation::Continue,
+ };
+ self.proxy.send(Iq {
+ from: None,
+ to: Some(from),
+ id: Some(id),
+ payload: payload,
+ }.into());
+ Propagation::Stop
+ } else {
+ Propagation::Continue
+ }
+ }
+}
+
+impl_plugin!(IbbPlugin, proxy, [
+ (Iq, Priority::Default) => handle_iq,
+]);