Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=610ab73ac4cc8912fc253bbdc6d1f74bad3c8e3a
Commit: 610ab73ac4cc8912fc253bbdc6d1f74bad3c8e3a
Parent: d023f629451ace6f37eb5d2cf29ddd24497c91dc
Author: Vlad Yasevich <[EMAIL PROTECTED]>
AuthorDate: Mon Jan 15 19:18:30 2007 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Tue Jan 23 20:25:46 2007 -0800
[SCTP]: Correctly handle unexpected INIT-ACK chunk.
Consider the chunk as Out-of-the-Blue if we don't have
an endpoint. Otherwise discard it as before.
Signed-off-by: Vlad Yasevich <[EMAIL PROTECTED]>
Signed-off-by: Sridhar Samudrala <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
include/net/sctp/sm.h | 1 +
net/sctp/sm_statefuns.c | 22 ++++++++++++++++++++++
net/sctp/sm_statetable.c | 2 +-
3 files changed, 24 insertions(+), 1 deletions(-)
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index 3269ed1..73cb994 100644
--- a/include/net/sctp/sm.h
+++ b/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;
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 2c165dc..fce1f60 100644
--- a/net/sctp/sm_statefuns.c
+++ b/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')
*
diff --git a/net/sctp/sm_statetable.c b/net/sctp/sm_statetable.c
index 733dd87..5f6cc7a 100644
--- a/net/sctp/sm_statetable.c
+++ b/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 */ \
-
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