extern int dccp_debug;
#define dccp_pr_debug(format, a...) DCCP_PR_DEBUG(dccp_debug, format, ##a)
#define dccp_pr_debug_cat(format, a...) DCCP_PRINTK(dccp_debug, format, ##a)
-#define dccp_debug(fmt, a...) dccp_pr_debug_cat(KERN_DEBUG fmt, ##a)
#else
#define dccp_pr_debug(format, a...)
#define dccp_pr_debug_cat(format, a...)
-#define dccp_debug(format, a...)
#endif
extern struct inet_hashinfo dccp_hashinfo;
* - DCCP-Reset with ACK Subheader and 4 bytes of Reset Code fields
* Hence a safe upper bound for the maximum option length is 1020-28 = 992
*/
-#define MAX_DCCP_SPECIFIC_HEADER (255 * sizeof(uint32_t))
+#define MAX_DCCP_SPECIFIC_HEADER (255 * sizeof(int))
#define DCCP_MAX_PACKET_HDR 28
#define DCCP_MAX_OPT_LEN (MAX_DCCP_SPECIFIC_HEADER - DCCP_MAX_PACKET_HDR)
#define MAX_DCCP_HEADER (MAX_DCCP_SPECIFIC_HEADER + MAX_HEADER)
-/* Upper bound for initial feature-negotiation overhead (padded to 32 bits) */
-#define DCCP_FEATNEG_OVERHEAD (32 * sizeof(uint32_t))
-
#define DCCP_TIMEWAIT_LEN (60 * HZ) /* how long to wait to destroy TIME-WAIT
* state, about 60 seconds */
extern int sysctl_dccp_request_retries;
extern int sysctl_dccp_retries1;
extern int sysctl_dccp_retries2;
+extern int sysctl_dccp_feat_sequence_window;
+extern int sysctl_dccp_feat_rx_ccid;
+extern int sysctl_dccp_feat_tx_ccid;
+extern int sysctl_dccp_feat_ack_ratio;
+extern int sysctl_dccp_feat_send_ack_vector;
+extern int sysctl_dccp_feat_send_ndp_count;
extern int sysctl_dccp_tx_qlen;
extern int sysctl_dccp_sync_ratelimit;
extern void dccp_set_state(struct sock *sk, const int state);
extern void dccp_done(struct sock *sk);
-extern int dccp_reqsk_init(struct request_sock *rq, struct dccp_sock const *dp,
- struct sk_buff const *skb);
+extern void dccp_reqsk_init(struct request_sock *req, struct sk_buff *skb);
extern int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
static inline void dccp_update_gsr(struct sock *sk, u64 seq)
{
struct dccp_sock *dp = dccp_sk(sk);
+ const struct dccp_minisock *dmsk = dccp_msk(sk);
dp->dccps_gsr = seq;
- /* Sequence validity window depends on remote Sequence Window (7.5.1) */
- dp->dccps_swl = SUB48(ADD48(dp->dccps_gsr, 1), dp->dccps_r_seq_win / 4);
- /*
- * Adjust SWL so that it is not below ISR. In contrast to RFC 4340,
- * 7.5.1 we perform this check beyond the initial handshake: W/W' are
- * always > 32, so for the first W/W' packets in the lifetime of a
- * connection we always have to adjust SWL.
- * A second reason why we are doing this is that the window depends on
- * the feature-remote value of Sequence Window: nothing stops the peer
- * from updating this value while we are busy adjusting SWL for the
- * first W packets (we would have to count from scratch again then).
- * Therefore it is safer to always make sure that the Sequence Window
- * is not artificially extended by a peer who grows SWL downwards by
- * continually updating the feature-remote Sequence-Window.
- * If sequence numbers wrap it is bad luck. But that will take a while
- * (48 bit), and this measure prevents Sequence-number attacks.
- */
- if (before48(dp->dccps_swl, dp->dccps_isr))
- dp->dccps_swl = dp->dccps_isr;
- dp->dccps_swh = ADD48(dp->dccps_gsr, (3 * dp->dccps_r_seq_win) / 4);
+ dccp_set_seqno(&dp->dccps_swl,
+ dp->dccps_gsr + 1 - (dmsk->dccpms_sequence_window / 4));
+ dccp_set_seqno(&dp->dccps_swh,
+ dp->dccps_gsr + (3 * dmsk->dccpms_sequence_window) / 4);
}
static inline void dccp_update_gss(struct sock *sk, u64 seq)
{
struct dccp_sock *dp = dccp_sk(sk);
- dp->dccps_gss = seq;
- /* Ack validity window depends on local Sequence Window value (7.5.1) */
- dp->dccps_awl = SUB48(ADD48(dp->dccps_gss, 1), dp->dccps_l_seq_win);
- /* Adjust AWL so that it is not below ISS - see comment above for SWL */
- if (before48(dp->dccps_awl, dp->dccps_iss))
- dp->dccps_awl = dp->dccps_iss;
- dp->dccps_awh = dp->dccps_gss;
-}
-
-static inline int dccp_ackvec_pending(const struct sock *sk)
-{
- return dccp_sk(sk)->dccps_hc_rx_ackvec != NULL &&
- !dccp_ackvec_is_empty(dccp_sk(sk)->dccps_hc_rx_ackvec);
+ dp->dccps_awh = dp->dccps_gss = seq;
+ dccp_set_seqno(&dp->dccps_awl,
+ (dp->dccps_gss -
+ dccp_msk(sk)->dccpms_sequence_window + 1));
}
static inline int dccp_ack_pending(const struct sock *sk)
{
- return dccp_ackvec_pending(sk) || inet_csk_ack_scheduled(sk);
+ const struct dccp_sock *dp = dccp_sk(sk);
+ return dp->dccps_timestamp_echo != 0 ||
+#ifdef CONFIG_IP_DCCP_ACKVEC
+ (dccp_msk(sk)->dccpms_send_ack_vector &&
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
+#endif
+ inet_csk_ack_scheduled(sk);
}
-extern int dccp_feat_signal_nn_change(struct sock *sk, u8 feat, u64 nn_val);
-extern int dccp_feat_finalise_settings(struct dccp_sock *dp);
-extern int dccp_feat_server_ccid_dependencies(struct dccp_request_sock *dreq);
-extern int dccp_feat_insert_opts(struct dccp_sock*, struct dccp_request_sock*,
- struct sk_buff *skb);
-extern int dccp_feat_activate_values(struct sock *sk, struct list_head *fn);
-extern void dccp_feat_list_purge(struct list_head *fn_list);
-
extern int dccp_insert_options(struct sock *sk, struct sk_buff *skb);
extern int dccp_insert_options_rsk(struct dccp_request_sock*, struct sk_buff*);
extern int dccp_insert_option_elapsed_time(struct sock *sk,