sctp: rwnd_press should be cumulative
rwnd_press tracks the pressure on the recieve window. Every timer the receive buffer overlows, we truncate the receive window and then grow it back. However, if we don't track the cumulative presser, it's possible to reach a situation when receive buffer is empty, but rwnd stays truncated. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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@ -1482,7 +1482,7 @@ void sctp_assoc_rwnd_decrease(struct sctp_association *asoc, unsigned len)
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if (asoc->rwnd >= len) {
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asoc->rwnd -= len;
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if (over) {
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asoc->rwnd_press = asoc->rwnd;
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asoc->rwnd_press += asoc->rwnd;
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asoc->rwnd = 0;
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}
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} else {
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