---

yaml
---
r: 45778
b: refs/heads/master
c: 610ab73
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d023f629451ace6f37eb5d2cf29ddd24497c91dc
+refs/heads/master: 610ab73ac4cc8912fc253bbdc6d1f74bad3c8e3a

trunk/include/net/sctp/sm.h

@@ -134,6 +134,7 @@ sctp_state_fn_t sctp_sf_violation;
 sctp_state_fn_t sctp_sf_discard_chunk;
 sctp_state_fn_t sctp_sf_do_5_2_1_siminit;
 sctp_state_fn_t sctp_sf_do_5_2_2_dupinit;
+sctp_state_fn_t sctp_sf_do_5_2_3_initack;
 sctp_state_fn_t sctp_sf_do_5_2_4_dupcook;
 sctp_state_fn_t sctp_sf_unk_chunk;
 sctp_state_fn_t sctp_sf_do_8_5_1_E_sa;

trunk/net/sctp/sm_statefuns.c

@@ -1534,6 +1534,28 @@ sctp_disposition_t sctp_sf_do_5_2_2_dupinit(const struct sctp_endpoint *ep,
 }
 
 
+/*
+ * Unexpected INIT-ACK handler.
+ *
+ * Section 5.2.3
+ * If an INIT ACK received by an endpoint in any state other than the
+ * COOKIE-WAIT state, the endpoint should discard the INIT ACK chunk.
+ * An unexpected INIT ACK usually indicates the processing of an old or
+ * duplicated INIT chunk.
+*/
+sctp_disposition_t sctp_sf_do_5_2_3_initack(const struct sctp_endpoint *ep,
+					    const struct sctp_association *asoc,
+					    const sctp_subtype_t type,
+					    void *arg, sctp_cmd_seq_t *commands)
+{
+	/* Per the above section, we'll discard the chunk if we have an
+	 * endpoint.  If this is an OOTB INIT-ACK, treat it as such.
+	 */
+        if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
+		return sctp_sf_ootb(ep, asoc, type, arg, commands);
+	else
+		return sctp_sf_discard_chunk(ep, asoc, type, arg, commands);
+}
 
 /* Unexpected COOKIE-ECHO handler for peer restart (Table 2, action 'A')
  *

trunk/net/sctp/sm_statetable.c

@@ -152,7 +152,7 @@ const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type,
 	/* SCTP_STATE_EMPTY */ \
 	TYPE_SCTP_FUNC(sctp_sf_ootb), \
 	/* SCTP_STATE_CLOSED */ \
-	TYPE_SCTP_FUNC(sctp_sf_discard_chunk), \
+	TYPE_SCTP_FUNC(sctp_sf_do_5_2_3_initack), \
 	/* SCTP_STATE_COOKIE_WAIT */ \
 	TYPE_SCTP_FUNC(sctp_sf_do_5_1C_ack), \
 	/* SCTP_STATE_COOKIE_ECHOED */ \