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Fix the computation of the numbers of entries of the mapping array to

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look at when generating a SACK. This was wrong in case of sequence
numbers wrap arounds.

Thanks to Gwenael FOURRE for reporting the issue for the userland stack:
https://github.com/sctplab/usrsctp/issues/462
MFC after:		3 days
This commit is contained in:
tuexen 2020-05-05 17:52:44 +00:00
parent 5f5c33a064
commit 73feb6f1cf
1 changed files with 1 additions and 1 deletions
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2
sys/netinet/sctp_output.c
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@ -10713,7 +10713,7 @@ sctp_send_sack(struct sctp_tcb *stcb, int so_locked
if (highest_tsn > asoc->mapping_array_base_tsn) {
siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
}
} else {
sack = NULL;