: Exploit the `Ack Pending' flag
PATCH 1/5 : Exploit the `Ack Pending' flag
[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 <[email protected]>
--- net/dccp/dccp.h | 7 ++++++- net/dccp/options.c | 1 + 2 files changed, 7 insertions(+), 1 deletion(-)
net/dccp/dccp.h +6 -1
@@ -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)) ||
net/dccp/options.c +1 -0
@@ -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)
Quoted 8 lines · Gerrit Renker
[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 <[email protected]>
Acked-by Ian McDonald <[email protected]>