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BUG:Turns out we need to use both bit maps

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to calculate the cum-ack (we were not doing
it for the NR-Sack case). With this fix
NR-sack should now work correctly.
MFC after:	1 week
This commit is contained in:
Randall Stewart 2010-06-09 16:39:18 +00:00
parent f40645c83d
commit 8dcde5165e
1 changed files with 1 additions and 11 deletions
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12
sys/netinet/sctp_indata.c
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@ -2267,7 +2267,6 @@ sctp_slide_mapping_arrays(struct sctp_tcb *stcb)
uint8_t val;
int slide_from, slide_end, lgap, distance;
uint32_t old_cumack, old_base, old_highest, highest_tsn;
int type;
asoc = &stcb->asoc;
at = 0;
@ -2279,18 +2278,9 @@ sctp_slide_mapping_arrays(struct sctp_tcb *stcb)
* We could probably improve this a small bit by calculating the
* offset of the current cum-ack as the starting point.
*/
if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off) &&
stcb->asoc.peer_supports_nr_sack) {
type = SCTP_NR_SELECTIVE_ACK;
} else {
type = SCTP_SELECTIVE_ACK;
}
at = 0;
for (slide_from = 0; slide_from < stcb->asoc.mapping_array_size; slide_from++) {
if (type == SCTP_NR_SELECTIVE_ACK)
val = asoc->nr_mapping_array[slide_from];
else
val = asoc->nr_mapping_array[slide_from] | asoc->mapping_array[slide_from];
val = asoc->nr_mapping_array[slide_from] | asoc->mapping_array[slide_from];
if (val == 0xff) {
at += 8;
} else {