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Bugfix: Take also the nr-mapping array into account when detecting

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gaps.

Reviewed by: rrs@
MFC after: 3 days.
This commit is contained in:
Michael Tuexen 2010-12-16 21:01:02 +00:00
parent fba1bf5a2c
commit 8f777478ff
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=216495
2 changed files with 14 additions and 10 deletions
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12
sys/netinet/sctp_indata.c
View File

@ -2585,8 +2585,9 @@ sctp_process_data(struct mbuf **mm, int iphlen, int *offset, int length,
int num_chunks = 0; /* number of control chunks processed */
int stop_proc = 0;
int chk_length, break_flag, last_chunk;
int abort_flag = 0, was_a_gap = 0;
int abort_flag = 0, was_a_gap;
struct mbuf *m;
uint32_t highest_tsn;
/* set the rwnd */
sctp_set_rwnd(stcb, &stcb->asoc);
@ -2594,11 +2595,12 @@ sctp_process_data(struct mbuf **mm, int iphlen, int *offset, int length,
m = *mm;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map,
stcb->asoc.cumulative_tsn, MAX_TSN)) {
/* there was a gap before this data was processed */
was_a_gap = 1;
if (compare_with_wrap(asoc->highest_tsn_inside_nr_map, asoc->highest_tsn_inside_map, MAX_TSN)) {
highest_tsn = asoc->highest_tsn_inside_nr_map;
} else {
highest_tsn = asoc->highest_tsn_inside_map;
}
was_a_gap = compare_with_wrap(highest_tsn, stcb->asoc.cumulative_tsn, MAX_TSN);
/*
* setup where we got the last DATA packet from for any SACK that
* may need to go out. Don't bump the net. This is done ONLY when a

12
sys/netinet/sctp_input.c
View File

@ -5650,13 +5650,15 @@ sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset,
*/
}
if ((data_processed == 0) && (fwd_tsn_seen)) {
int was_a_gap = 0;
int was_a_gap;
uint32_t highest_tsn;
if (compare_with_wrap(stcb->asoc.highest_tsn_inside_map,
stcb->asoc.cumulative_tsn, MAX_TSN)) {
/* there was a gap before this data was processed */
was_a_gap = 1;
if (compare_with_wrap(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map, MAX_TSN)) {
highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
} else {
highest_tsn = stcb->asoc.highest_tsn_inside_map;
}
was_a_gap = compare_with_wrap(highest_tsn, stcb->asoc.cumulative_tsn, MAX_TSN);
stcb->asoc.send_sack = 1;
sctp_sack_check(stcb, was_a_gap, &abort_flag);
if (abort_flag) {