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[DCCP] ACKVEC: fix ackvector length calculation

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Fix ackvector length calculation upon receiving an "ack-of-ack".  This
patch avoids the ackvector from growing too large which causes it to
not be inserted into packets.

Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrea Bittau 2006-09-19 13:04:54 -07:00 committed by David S. Miller
parent a1e59abf82
commit 23d06e3b98
1 changed files with 7 additions and 5 deletions
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12
net/dccp/ackvec.c
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@ -353,11 +353,13 @@ static void dccp_ackvec_throw_record(struct dccp_ackvec *av,
{
struct dccp_ackvec_record *next;
av->dccpav_buf_tail = avr->dccpavr_ack_ptr - 1;
if (av->dccpav_buf_tail == 0)
av->dccpav_buf_tail = DCCP_MAX_ACKVEC_LEN - 1;
av->dccpav_vec_len -= avr->dccpavr_sent_len;
/* sort out vector length */
if (av->dccpav_buf_head <= avr->dccpavr_ack_ptr)
av->dccpav_vec_len = avr->dccpavr_ack_ptr - av->dccpav_buf_head;
else
av->dccpav_vec_len = DCCP_MAX_ACKVEC_LEN - 1
- av->dccpav_buf_head
+ avr->dccpavr_ack_ptr;
/* free records */
list_for_each_entry_safe_from(avr, next, &av->dccpav_records,