[DCCP]: Exploit the `Ack Pending' flag
This provides a wrapper around the function which sets the `Ack Pending' flag
on inet connection sockets. This is very useful for some DCCP cases, such as
the out-of-band feature negotiation of NN options for an established connection
(next patches).
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/dccp.h | 7 ++++++-
net/dccp/options.c | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -405,10 +405,15 @@ static inline void dccp_update_gss(struc
dp->dccps_awh = dp->dccps_gss;
}
+static inline void dccp_schedule_ack(struct sock *sk)
+{
+ inet_csk_schedule_ack(sk);
+}
+
static inline int dccp_ack_pending(const struct sock *sk)
{
const struct dccp_sock *dp = dccp_sk(sk);
- return dp->dccps_tstamp != NULL ||
+ return
#ifdef CONFIG_IP_DCCP_ACKVEC
(dp->dccps_hc_rx_ackvec != NULL &&
dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -166,6 +166,7 @@ int dccp_parse_options(struct sock *sk,
opt_recv->dccpor_timestamp = ntohl(opt_val);
(*tse)->ts_echo = opt_recv->dccpor_timestamp;
+ dccp_schedule_ack(sk);
dccp_pr_debug("%s rx opt: TIMESTAMP=%u, ackno=%llu\n",
dccp_role(sk), opt_recv->dccpor_timestamp,
(unsigned long long)
-
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