diff options
| author |   Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-11-24 21:32:53 -0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-01-28 14:54:53 -0800 |
| commit | df054e1d00fdafa2e2920319df326ddb3f0d0413 (patch) | |
| tree | 4c5178212391dc2b1fe0d329da5e8552bcab4a55 /net/dccp/ccids/ccid2.c | |
| parent | [CCID2]: Fix sequence number arithmetic/comparisons (diff) | |
| download | linux-dev-df054e1d00fdafa2e2920319df326ddb3f0d0413.tar.xz linux-dev-df054e1d00fdafa2e2920319df326ddb3f0d0413.zip | |
[CCID2]: Don't assign negative values to Ack Ratio
Since it makes not sense to assign negative values to Ack Ratio, this
patch disallows this possibility.
As a consequence, a Bug test for negative Ack Ratio values becomes obsolete.
Furthermore, a check against overflow (as Ack Ratio may not exceed 2 bytes,
due to RFC 4340, 11.3) has been added.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ccids/ccid2.c')
| -rw-r--r-- | net/dccp/ccids/ccid2.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c index 55522182f2fa..f18235e8ce84 100644 --- a/net/dccp/ccids/ccid2.c +++ b/net/dccp/ccids/ccid2.c @@ -140,7 +140,7 @@ static int ccid2_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb) return 1; /* XXX CCID should dequeue when ready instead of polling */ } -static void ccid2_change_l_ack_ratio(struct sock *sk, int val) +static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val) { struct dccp_sock *dp = dccp_sk(sk); /* @@ -159,9 +159,10 @@ static void ccid2_change_l_ack_ratio(struct sock *sk, int val) if (val > max) val = max; } + if (val > 0xFFFF) /* RFC 4340, 11.3 */ + val = 0xFFFF; - ccid2_pr_debug("changing local ack ratio to %d\n", val); - WARN_ON(val <= 0); + ccid2_pr_debug("changing local ack ratio to %u\n", val); dp->dccps_l_ack_ratio = val; } @@ -572,7 +573,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) hctx->ccid2hctx_rpdupack = -1; /* XXX lame */ hctx->ccid2hctx_rpseq = 0; - ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio << 1); + ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio); } } } |