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authorWei Yongjun <yjwei@cn.fujitsu.com>2009-11-23 15:53:53 -0500
committerVlad Yasevich <vladislav.yasevich@hp.com>2009-11-23 15:53:53 -0500
commit6dc7694f9df20f148076d82d00cb3663afb0b000 (patch)
treec5c3c20ad80383bb28cf02e25cc6c0a60099e266 /net/sctp
parent475cba4ec8ee6b427cc3567692e6f48dd483c069 (diff)
sctp: implement the receiver side for SACK-IMMEDIATELY extension
This patch implement the receiver side for SACK-IMMEDIATELY extension: Section 4.2. Receiver Side Considerations On reception of an SCTP packet containing a DATA chunk with the I-bit set, the receiver SHOULD NOT delay the sending of the corresponding SACK chunk and SHOULD send it back immediately. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/sm_statefuns.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index d4df45022ff..8ee24c9dc7e 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -2868,6 +2868,7 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
sctp_cmd_seq_t *commands)
{
struct sctp_chunk *chunk = arg;
+ sctp_arg_t force = SCTP_NOFORCE();
int error;
if (!sctp_vtag_verify(chunk, asoc)) {
@@ -2901,6 +2902,9 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
BUG();
}
+ if (chunk->chunk_hdr->flags & SCTP_DATA_SACK_IMM)
+ force = SCTP_FORCE();
+
if (asoc->autoclose) {
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_AUTOCLOSE));
@@ -2929,7 +2933,7 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
* more aggressive than the following algorithms allow.
*/
if (chunk->end_of_packet)
- sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, SCTP_NOFORCE());
+ sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, force);
return SCTP_DISPOSITION_CONSUME;
@@ -2954,7 +2958,7 @@ discard_force:
discard_noforce:
if (chunk->end_of_packet)
- sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, SCTP_NOFORCE());
+ sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, force);
return SCTP_DISPOSITION_DISCARD;
consume: