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authorVlad Yasevich <vladislav.yasevich@hp.com>2010-05-01 06:41:10 +0400
committerVlad Yasevich <vladislav.yasevich@hp.com>2010-05-01 06:41:10 +0400
commitea862c8d1f4a0d193979c7412c3b946f600721ce (patch)
tree929dd96e2562258a96739373c758ab6dcbc2bb1b /net/sctp/outqueue.c
parent65883371894be2631603d5d412f90f8c09290fef (diff)
downloadlinux-ea862c8d1f4a0d193979c7412c3b946f600721ce.tar.xz
sctp: correctly mark missing chunks in fast recovery
According to RFC 4960 Section 7.2.4: If an endpoint is in Fast Recovery and a SACK arrives that advances the Cumulative TSN Ack Point, the miss indications are incremented for all TSNs reported missing in the SACK. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp/outqueue.c')
-rw-r--r--net/sctp/outqueue.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 786c4ff97ae4..b491a1aac3e4 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -1154,6 +1154,7 @@ int sctp_outq_sack(struct sctp_outq *q, struct sctp_sackhdr *sack)
struct sctp_transport *primary = asoc->peer.primary_path;
int count_of_newacks = 0;
int gap_ack_blocks;
+ u8 accum_moved = 0;
/* Grab the association's destination address list. */
transport_list = &asoc->peer.transport_addr_list;
@@ -1232,16 +1233,22 @@ int sctp_outq_sack(struct sctp_outq *q, struct sctp_sackhdr *sack)
count_of_newacks ++;
}
+ /* Move the Cumulative TSN Ack Point if appropriate. */
+ if (TSN_lt(asoc->ctsn_ack_point, sack_ctsn)) {
+ asoc->ctsn_ack_point = sack_ctsn;
+ accum_moved = 1;
+ }
+
if (gap_ack_blocks) {
+
+ if (asoc->fast_recovery && accum_moved)
+ highest_new_tsn = highest_tsn;
+
list_for_each_entry(transport, transport_list, transports)
sctp_mark_missing(q, &transport->transmitted, transport,
highest_new_tsn, count_of_newacks);
}
- /* Move the Cumulative TSN Ack Point if appropriate. */
- if (TSN_lt(asoc->ctsn_ack_point, sack_ctsn))
- asoc->ctsn_ack_point = sack_ctsn;
-
/* Update unack_data field in the assoc. */
sctp_sack_update_unack_data(asoc, sack);
@@ -1685,7 +1692,8 @@ static void sctp_mark_missing(struct sctp_outq *q,
struct sctp_chunk *chunk;
__u32 tsn;
char do_fast_retransmit = 0;
- struct sctp_transport *primary = q->asoc->peer.primary_path;
+ struct sctp_association *asoc = q->asoc;
+ struct sctp_transport *primary = asoc->peer.primary_path;
list_for_each_entry(chunk, transmitted_queue, transmitted_list) {