* DCCP - specific warning and debugging macros.
*/
#define DCCP_WARN(fmt, a...) LIMIT_NETDEBUG(KERN_WARNING "%s: " fmt, \
- __FUNCTION__, ##a)
+ __func__, ##a)
#define DCCP_CRIT(fmt, a...) printk(KERN_CRIT fmt " at %s:%d/%s()\n", ##a, \
- __FILE__, __LINE__, __FUNCTION__)
+ __FILE__, __LINE__, __func__)
#define DCCP_BUG(a...) do { DCCP_CRIT("BUG: " a); dump_stack(); } while(0)
#define DCCP_BUG_ON(cond) do { if (unlikely((cond) != 0)) \
DCCP_BUG("\"%s\" holds (exception!)", \
printk(fmt, ##args); \
} while(0)
#define DCCP_PR_DEBUG(enable, fmt, a...) DCCP_PRINTK(enable, KERN_DEBUG \
- "%s: " fmt, __FUNCTION__, ##a)
+ "%s: " fmt, __func__, ##a)
#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;
extern struct inet_hashinfo dccp_hashinfo;
-extern atomic_t dccp_orphan_count;
+extern struct percpu_counter dccp_orphan_count;
extern void dccp_time_wait(struct sock *sk, int state, int timeo);
/* RFC 1122, 4.2.3.1 initial RTO value */
#define DCCP_TIMEOUT_INIT ((unsigned)(3 * HZ))
-#define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
+/*
+ * The maximum back-off value for retransmissions. This is needed for
+ * - retransmitting client-Requests (sec. 8.1.1),
+ * - retransmitting Close/CloseReq when closing (sec. 8.3),
+ * - feature-negotiation retransmission (sec. 6.6.3),
+ * - Acks in client-PARTOPEN state (sec. 8.1.5).
+ */
+#define DCCP_RTO_MAX ((unsigned)(64 * HZ))
-/* bounds for sampled RTT values from packet exchanges (in usec) */
+/*
+ * RTT sampling: sanity bounds and fallback RTT value from RFC 4340, section 3.4
+ */
#define DCCP_SANE_RTT_MIN 100
-#define DCCP_SANE_RTT_MAX (4 * USEC_PER_SEC)
+#define DCCP_FALLBACK_RTT (USEC_PER_SEC / 5)
+#define DCCP_SANE_RTT_MAX (3 * USEC_PER_SEC)
/* Maximal interval between probes for local resources. */
#define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U))
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;
/*
* 48-bit sequence number arithmetic (signed and unsigned)
return after48(seq1, seq2) ? seq1 : seq2;
}
-/* is seq1 next seqno after seq2 */
-static inline int follows48(const u64 seq1, const u64 seq2)
+/**
+ * dccp_loss_free - Evaluates condition for data loss from RFC 4340, 7.7.1
+ * @s1: start sequence number
+ * @s2: end sequence number
+ * @ndp: NDP count on packet with sequence number @s2
+ * Returns true if the sequence range s1...s2 has no data loss.
+ */
+static inline bool dccp_loss_free(const u64 s1, const u64 s2, const u64 ndp)
{
- return dccp_delta_seqno(seq2, seq1) == 1;
+ s64 delta = dccp_delta_seqno(s1, s2);
+
+ WARN_ON(delta < 0);
+ return (u64)delta <= ndp + 1;
}
enum {
extern void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
-extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
+extern int dccp_retransmit_skb(struct sock *sk);
extern void dccp_send_ack(struct sock *sk);
-extern void dccp_send_delayed_ack(struct sock *sk);
-extern void dccp_reqsk_send_ack(struct sk_buff *sk, struct request_sock *rsk);
+extern void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *rsk);
extern void dccp_send_sync(struct sock *sk, const u64 seq,
const enum dccp_pkt_type pkt_type);
extern void dccp_set_state(struct sock *sk, const int state);
extern void dccp_done(struct sock *sk);
-extern void dccp_reqsk_init(struct request_sock *req, struct sk_buff *skb);
+extern int dccp_reqsk_init(struct request_sock *rq, struct dccp_sock const *dp,
+ struct sk_buff const *skb);
extern int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
const struct dccp_hdr *dh, const unsigned len);
extern int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
-extern int dccp_destroy_sock(struct sock *sk);
+extern void dccp_destroy_sock(struct sock *sk);
extern void dccp_close(struct sock *sk, long timeout);
extern struct sk_buff *dccp_make_response(struct sock *sk,
extern int dccp_connect(struct sock *sk);
extern int dccp_disconnect(struct sock *sk, int flags);
-extern void dccp_hash(struct sock *sk);
-extern void dccp_unhash(struct sock *sk);
extern int dccp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
extern int dccp_setsockopt(struct sock *sk, int level, int optname,
extern int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len);
+extern struct sk_buff *dccp_ctl_make_reset(struct sock *sk,
+ struct sk_buff *skb);
extern int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code);
extern void dccp_send_close(struct sock *sk, const int active);
extern int dccp_invalid_packet(struct sk_buff *skb);
-extern u32 dccp_sample_rtt(struct sock *sk, ktime_t t_recv,
- ktime_t *t_history);
+extern u32 dccp_sample_rtt(struct sock *sk, long delta);
static inline int dccp_bad_service_code(const struct sock *sk,
const __be32 service)
return !dccp_list_has_service(dp->dccps_service_list, service);
}
+/**
+ * dccp_skb_cb - DCCP per-packet control information
+ * @dccpd_type: one of %dccp_pkt_type (or unknown)
+ * @dccpd_ccval: CCVal field (5.1), see e.g. RFC 4342, 8.1
+ * @dccpd_reset_code: one of %dccp_reset_codes
+ * @dccpd_reset_data: Data1..3 fields (depend on @dccpd_reset_code)
+ * @dccpd_opt_len: total length of all options (5.8) in the packet
+ * @dccpd_seq: sequence number
+ * @dccpd_ack_seq: acknowledgment number subheader field value
+ * This is used for transmission as well as for reception.
+ */
struct dccp_skb_cb {
+ union {
+ struct inet_skb_parm h4;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ struct inet6_skb_parm h6;
+#endif
+ } header;
__u8 dccpd_type:4;
__u8 dccpd_ccval:4;
- __u8 dccpd_reset_code;
+ __u8 dccpd_reset_code,
+ dccpd_reset_data[3];
__u16 dccpd_opt_len;
__u64 dccpd_seq;
__u64 dccpd_ack_seq;
#define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
+/* RFC 4340, sec. 7.7 */
static inline int dccp_non_data_packet(const struct sk_buff *skb)
{
const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
type == DCCP_PKT_SYNCACK;
}
+/* RFC 4340, sec. 7.7 */
+static inline int dccp_data_packet(const struct sk_buff *skb)
+{
+ const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
+
+ return type == DCCP_PKT_DATA ||
+ type == DCCP_PKT_DATAACK ||
+ type == DCCP_PKT_REQUEST ||
+ type == DCCP_PKT_RESPONSE;
+}
+
static inline int dccp_packet_without_ack(const struct sk_buff *skb)
{
const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
{
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 &&
+ (dp->dccps_hc_rx_ackvec != NULL &&
dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
-#endif
inet_csk_ack_scheduled(sk);
}
+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,
struct sk_buff *skb,
u32 elapsed_time);
+extern u32 dccp_timestamp(void);
+extern void dccp_timestamping_init(void);
extern int dccp_insert_option_timestamp(struct sock *sk,
struct sk_buff *skb);
extern int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
unsigned char option,
const void *value, unsigned char len);
-extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
-
-static inline suseconds_t timeval_usecs(const struct timeval *tv)
-{
- return tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
-}
-
-static inline suseconds_t timeval_delta(const struct timeval *large,
- const struct timeval *small)
-{
- time_t secs = large->tv_sec - small->tv_sec;
- suseconds_t usecs = large->tv_usec - small->tv_usec;
-
- if (usecs < 0) {
- secs--;
- usecs += USEC_PER_SEC;
- }
- return secs * USEC_PER_SEC + usecs;
-}
-
-static inline void timeval_add_usecs(struct timeval *tv,
- const suseconds_t usecs)
-{
- tv->tv_usec += usecs;
- while (tv->tv_usec >= USEC_PER_SEC) {
- tv->tv_sec++;
- tv->tv_usec -= USEC_PER_SEC;
- }
-}
-
-static inline void timeval_sub_usecs(struct timeval *tv,
- const suseconds_t usecs)
-{
- tv->tv_usec -= usecs;
- while (tv->tv_usec < 0) {
- tv->tv_sec--;
- tv->tv_usec += USEC_PER_SEC;
- }
- DCCP_BUG_ON(tv->tv_sec < 0);
-}
-
#ifdef CONFIG_SYSCTL
extern int dccp_sysctl_init(void);
extern void dccp_sysctl_exit(void);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff