diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/dccp/feat.c | 19 | ||||
| -rw-r--r-- | net/dccp/options.c | 18 | ||||
| -rw-r--r-- | net/dccp/timer.c | 12 |
3 files changed, 8 insertions, 41 deletions
diff --git a/net/dccp/feat.c b/net/dccp/feat.c index 069d8ff..0e789e2 100644 --- a/net/dccp/feat.c +++ b/net/dccp/feat.c @@ -6,6 +6,8 @@ * * ASSUMPTIONS * ----------- + * o Feature negotiation is coordinated with connection setup (as in TCP), wild + * changes of parameters of an established connection are not supported. * o All currently known SP features have 1-byte quantities. If in the future * extensions of RFCs 4340..42 define features with item lengths larger than * one byte, a feature-specific extension of the code will be required. @@ -542,6 +544,9 @@ int dccp_feat_change_recv(struct sock *sk, u8 type, u8 feature, u8 *val, u8 len) { int rc; + /* Ignore Change requests other than during connection setup */ + if (sk->sk_state != DCCP_LISTEN && sk->sk_state != DCCP_REQUESTING) + return 0; dccp_feat_debug(type, feature, *val); /* figure out if it's SP or NN feature */ @@ -591,6 +596,9 @@ int dccp_feat_confirm_recv(struct sock *sk, u8 type, u8 feature, int found = 0; int all_confirmed = 1; + /* Ignore Confirm options other than during connection setup */ + if (sk->sk_state != DCCP_LISTEN && sk->sk_state != DCCP_REQUESTING) + return 0; dccp_feat_debug(type, feature, *val); /* locate our change request */ @@ -625,17 +633,6 @@ int dccp_feat_confirm_recv(struct sock *sk, u8 type, u8 feature, all_confirmed = 0; } - /* fix re-transmit timer */ - /* XXX gotta make sure that no option negotiation occurs during - * connection shutdown. Consider that the CLOSEREQ is sent and timer is - * on. if all options are confirmed it might kill timer which should - * remain alive until close is received. - */ - if (all_confirmed) { - dccp_pr_debug("clear feat negotiation timer %p\n", sk); - inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS); - } - if (!found) dccp_pr_debug("%s(%d, ...) never requested\n", dccp_feat_typename(type), feature); diff --git a/net/dccp/options.c b/net/dccp/options.c index 0809b63..67a171a 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -489,7 +489,6 @@ static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat, static int dccp_insert_options_feat(struct sock *sk, struct sk_buff *skb) { - struct dccp_sock *dp = dccp_sk(sk); struct dccp_minisock *dmsk = dccp_msk(sk); struct dccp_opt_pend *opt, *next; int change = 0; @@ -530,23 +529,6 @@ static int dccp_insert_options_feat(struct sock *sk, struct sk_buff *skb) } } - /* Retransmit timer. - * If this is the master listening sock, we don't set a timer on it. It - * should be fine because if the dude doesn't receive our RESPONSE - * [which will contain the CHANGE] he will send another REQUEST which - * will "retrnasmit" the change. - */ - if (change && dp->dccps_role != DCCP_ROLE_LISTEN) { - dccp_pr_debug("reset feat negotiation timer %p\n", sk); - - /* XXX don't reset the timer on re-transmissions. I.e. reset it - * only when sending new stuff i guess. Currently the timer - * never backs off because on re-transmission it just resets it! - */ - inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, - inet_csk(sk)->icsk_rto, DCCP_RTO_MAX); - } - return 0; } diff --git a/net/dccp/timer.c b/net/dccp/timer.c index 54b3c7e..162d1e6 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -87,17 +87,6 @@ static void dccp_retransmit_timer(struct sock *sk) { struct inet_connection_sock *icsk = inet_csk(sk); - /* retransmit timer is used for feature negotiation throughout - * connection. In this case, no packet is re-transmitted, but rather an - * ack is generated and pending changes are placed into its options. - */ - if (sk->sk_send_head == NULL) { - dccp_pr_debug("feat negotiation retransmit timeout %p\n", sk); - if (sk->sk_state == DCCP_OPEN) - dccp_send_ack(sk); - goto backoff; - } - /* * More than than 4MSL (8 minutes) has passed, a RESET(aborted) was * sent, no need to retransmit, this sock is dead. @@ -126,7 +115,6 @@ static void dccp_retransmit_timer(struct sock *sk) return; } -backoff: icsk->icsk_backoff++; icsk->icsk_rto = min(icsk->icsk_rto << 1, DCCP_RTO_MAX); |