From: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
Small update with regard to RFC 4340 (references added as documentation):
on Requests, Ack Vectors / Elapsed Time should be ignored.
Length handling of Elapsed Time also simplified.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
Signed-off-by: Ian McDonald <ian.mcdonald@xxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
net/dccp/options.c | 13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/net/dccp/options.c b/net/dccp/options.c
index d286cff..523250b 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -136,7 +136,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
break;
case DCCPO_ACK_VECTOR_0:
case DCCPO_ACK_VECTOR_1:
- if (pkt_type == DCCP_PKT_DATA)
+ if (dccp_packet_without_ack(skb)) /* RFC 4340, 11.4 */
break;
if (dccp_msk(sk)->dccpms_send_ack_vector &&
@@ -194,18 +194,17 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
opt_recv->dccpor_elapsed_time = elapsed_time;
break;
case DCCPO_ELAPSED_TIME:
- if (len != 2 && len != 4)
- goto out_invalid_option;
-
- if (pkt_type == DCCP_PKT_DATA)
- continue;
+ if (dccp_packet_without_ack(skb)) /* RFC 4340, 13.2 */
+ break;
if (len == 2) {
__be16 opt_val2 = get_unaligned((__be16 *)value);
elapsed_time = ntohs(opt_val2);
- } else {
+ } else if (len == 4) {
opt_val = get_unaligned((__be32 *)value);
elapsed_time = ntohl(opt_val);
+ } else {
+ goto out_invalid_option;
}
if (elapsed_time > opt_recv->dccpor_elapsed_time)
--
1.5.3.4
-
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