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-rw-r--r--net/dccp/dccp.h384
1 files changed, 213 insertions, 171 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index d8ad27bfe01..c67816647cc 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -13,6 +13,7 @@
*/
#include <linux/dccp.h>
+#include <linux/ktime.h>
#include <net/snmp.h>
#include <net/sock.h>
#include <net/tcp.h>
@@ -22,9 +23,9 @@
* 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!)", \
@@ -35,22 +36,24 @@
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 bool 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;
-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);
+void dccp_time_wait(struct sock *sk, int state, int timeo);
/*
* Set safe upper bounds for header and option length. Since Data Offset is 8
@@ -60,37 +63,42 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo);
* - 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(int))
+#define MAX_DCCP_SPECIFIC_HEADER (255 * sizeof(uint32_t))
#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 */
/* RFC 1122, 4.2.3.1 initial RTO value */
-#define DCCP_TIMEOUT_INIT ((unsigned)(3 * HZ))
+#define DCCP_TIMEOUT_INIT ((unsigned int)(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 int)(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)
-
-/* Maximal interval between probes for local resources. */
-#define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U))
+#define DCCP_FALLBACK_RTT (USEC_PER_SEC / 5)
+#define DCCP_SANE_RTT_MAX (3 * USEC_PER_SEC)
/* sysctl variables for DCCP */
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;
/*
* 48-bit sequence number arithmetic (signed and unsigned)
@@ -141,10 +149,28 @@ static inline u64 max48(const u64 seq1, const u64 seq2)
return after48(seq1, seq2) ? seq1 : seq2;
}
-/* is seq1 next seqno after seq2 */
-static inline int follows48(const u64 seq1, const u64 seq2)
+/**
+ * dccp_loss_count - Approximate the number of lost data packets in a burst loss
+ * @s1: last known sequence number before the loss ('hole')
+ * @s2: first sequence number seen after the 'hole'
+ * @ndp: NDP count on packet with sequence number @s2
+ */
+static inline u64 dccp_loss_count(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);
+ delta -= ndp + 1;
+
+ return delta > 0 ? delta : 0;
+}
+
+/**
+ * dccp_loss_free - Evaluate condition for data loss from RFC 4340, 7.7.1
+ */
+static inline bool dccp_loss_free(const u64 s1, const u64 s2, const u64 ndp)
+{
+ return dccp_loss_count(s1, s2, ndp) == 0;
}
enum {
@@ -169,22 +195,17 @@ enum {
#define DCCP_MIB_MAX __DCCP_MIB_MAX
struct dccp_mib {
unsigned long mibs[DCCP_MIB_MAX];
-} __SNMP_MIB_ALIGN__;
+};
DECLARE_SNMP_STAT(struct dccp_mib, dccp_statistics);
#define DCCP_INC_STATS(field) SNMP_INC_STATS(dccp_statistics, field)
#define DCCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(dccp_statistics, field)
-#define DCCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(dccp_statistics, field)
#define DCCP_DEC_STATS(field) SNMP_DEC_STATS(dccp_statistics, field)
-#define DCCP_ADD_STATS_BH(field, val) \
- SNMP_ADD_STATS_BH(dccp_statistics, field, val)
-#define DCCP_ADD_STATS_USER(field, val) \
- SNMP_ADD_STATS_USER(dccp_statistics, field, val)
/*
* Checksumming routines
*/
-static inline int dccp_csum_coverage(const struct sk_buff *skb)
+static inline unsigned int dccp_csum_coverage(const struct sk_buff *skb)
{
const struct dccp_hdr* dh = dccp_hdr(skb);
@@ -195,7 +216,7 @@ static inline int dccp_csum_coverage(const struct sk_buff *skb)
static inline void dccp_csum_outgoing(struct sk_buff *skb)
{
- int cov = dccp_csum_coverage(skb);
+ unsigned int cov = dccp_csum_coverage(skb);
if (cov >= skb->len)
dccp_hdr(skb)->dccph_cscov = 0;
@@ -203,101 +224,108 @@ static inline void dccp_csum_outgoing(struct sk_buff *skb)
skb->csum = skb_checksum(skb, 0, (cov > skb->len)? skb->len : cov, 0);
}
-extern void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
+void dccp_v4_send_check(struct sock *sk, struct sk_buff *skb);
-extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
+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);
+void dccp_send_ack(struct sock *sk);
+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);
+void dccp_send_sync(struct sock *sk, const u64 seq,
+ const enum dccp_pkt_type pkt_type);
+
+/*
+ * TX Packet Dequeueing Interface
+ */
+void dccp_qpolicy_push(struct sock *sk, struct sk_buff *skb);
+bool dccp_qpolicy_full(struct sock *sk);
+void dccp_qpolicy_drop(struct sock *sk, struct sk_buff *skb);
+struct sk_buff *dccp_qpolicy_top(struct sock *sk);
+struct sk_buff *dccp_qpolicy_pop(struct sock *sk);
+bool dccp_qpolicy_param_ok(struct sock *sk, __be32 param);
-extern void dccp_write_xmit(struct sock *sk, int block);
-extern void dccp_write_space(struct sock *sk);
+/*
+ * TX Packet Output and TX Timers
+ */
+void dccp_write_xmit(struct sock *sk);
+void dccp_write_space(struct sock *sk);
+void dccp_flush_write_queue(struct sock *sk, long *time_budget);
-extern void dccp_init_xmit_timers(struct sock *sk);
+void dccp_init_xmit_timers(struct sock *sk);
static inline void dccp_clear_xmit_timers(struct sock *sk)
{
inet_csk_clear_xmit_timers(sk);
}
-extern unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu);
+unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu);
-extern const char *dccp_packet_name(const int type);
-extern const char *dccp_state_name(const int state);
+const char *dccp_packet_name(const int type);
-extern void dccp_set_state(struct sock *sk, const int state);
-extern void dccp_done(struct sock *sk);
+void dccp_set_state(struct sock *sk, const int state);
+void dccp_done(struct sock *sk);
-extern void dccp_reqsk_init(struct request_sock *req, struct sk_buff *skb);
+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);
+int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
-extern struct sock *dccp_create_openreq_child(struct sock *sk,
- const struct request_sock *req,
- const struct sk_buff *skb);
+struct sock *dccp_create_openreq_child(struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb);
-extern int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
+int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
-extern struct sock *dccp_v4_request_recv_sock(struct sock *sk,
- struct sk_buff *skb,
- struct request_sock *req,
- struct dst_entry *dst);
-extern struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
- struct request_sock *req,
- struct request_sock **prev);
+struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct dst_entry *dst);
+struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct request_sock **prev);
-extern int dccp_child_process(struct sock *parent, struct sock *child,
- struct sk_buff *skb);
-extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
- struct dccp_hdr *dh, unsigned len);
-extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
- const struct dccp_hdr *dh, const unsigned len);
+int dccp_child_process(struct sock *parent, struct sock *child,
+ struct sk_buff *skb);
+int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
+ struct dccp_hdr *dh, unsigned int len);
+int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+ const struct dccp_hdr *dh, const unsigned int len);
-extern int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
-extern int dccp_destroy_sock(struct sock *sk);
+int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
+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,
- struct dst_entry *dst,
- struct request_sock *req);
+void dccp_close(struct sock *sk, long timeout);
+struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
+ struct request_sock *req);
-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,
- char __user *optval, int optlen);
+int dccp_connect(struct sock *sk);
+int dccp_disconnect(struct sock *sk, int flags);
+int dccp_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+int dccp_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen);
#ifdef CONFIG_COMPAT
-extern int compat_dccp_getsockopt(struct sock *sk,
- int level, int optname,
- char __user *optval, int __user *optlen);
-extern int compat_dccp_setsockopt(struct sock *sk,
- int level, int optname,
- char __user *optval, int optlen);
+int compat_dccp_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+int compat_dccp_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen);
#endif
-extern int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
-extern int dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t size);
-extern int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
- struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len);
-extern void dccp_shutdown(struct sock *sk, int how);
-extern int inet_dccp_listen(struct socket *sock, int backlog);
-extern unsigned int dccp_poll(struct file *file, struct socket *sock,
- poll_table *wait);
-extern int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
- int addr_len);
-
-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, struct timeval *t_recv,
- struct timeval *t_history);
+int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
+int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t size);
+int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int nonblock, int flags,
+ int *addr_len);
+void dccp_shutdown(struct sock *sk, int how);
+int inet_dccp_listen(struct socket *sock, int backlog);
+unsigned int dccp_poll(struct file *file, struct socket *sock,
+ poll_table *wait);
+int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
+
+struct sk_buff *dccp_ctl_make_reset(struct sock *sk, struct sk_buff *skb);
+int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code);
+void dccp_send_close(struct sock *sk, const int active);
+int dccp_invalid_packet(struct sk_buff *skb);
+u32 dccp_sample_rtt(struct sock *sk, long delta);
static inline int dccp_bad_service_code(const struct sock *sk,
const __be32 service)
@@ -309,10 +337,29 @@ static inline int dccp_bad_service_code(const struct sock *sk,
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 IS_ENABLED(CONFIG_IPV6)
+ 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;
@@ -320,6 +367,7 @@ struct dccp_skb_cb {
#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;
@@ -332,6 +380,17 @@ static inline int dccp_non_data_packet(const struct sk_buff *skb)
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;
@@ -361,90 +420,73 @@ static inline void dccp_hdr_set_ack(struct dccp_hdr_ack_bits *dhack,
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;
- 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);
+ if (after48(seq, dp->dccps_gsr))
+ 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);
}
static inline void dccp_update_gss(struct sock *sk, u64 seq)
{
struct dccp_sock *dp = dccp_sk(sk);
- 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)
-{
- 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_insert_options(struct sock *sk, struct sk_buff *skb);
-extern int dccp_insert_option_elapsed_time(struct sock *sk,
- struct sk_buff *skb,
- u32 elapsed_time);
-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;
+ 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 suseconds_t timeval_delta(const struct timeval *large,
- const struct timeval *small)
+static inline int dccp_ackvec_pending(const struct sock *sk)
{
- 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;
+ return dccp_sk(sk)->dccps_hc_rx_ackvec != NULL &&
+ !dccp_ackvec_is_empty(dccp_sk(sk)->dccps_hc_rx_ackvec);
}
-static inline void timeval_add_usecs(struct timeval *tv,
- const suseconds_t usecs)
+static inline int dccp_ack_pending(const struct sock *sk)
{
- tv->tv_usec += usecs;
- while (tv->tv_usec >= USEC_PER_SEC) {
- tv->tv_sec++;
- tv->tv_usec -= USEC_PER_SEC;
- }
+ return dccp_ackvec_pending(sk) || inet_csk_ack_scheduled(sk);
}
-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);
-}
+int dccp_feat_signal_nn_change(struct sock *sk, u8 feat, u64 nn_val);
+int dccp_feat_finalise_settings(struct dccp_sock *dp);
+int dccp_feat_server_ccid_dependencies(struct dccp_request_sock *dreq);
+int dccp_feat_insert_opts(struct dccp_sock*, struct dccp_request_sock*,
+ struct sk_buff *skb);
+int dccp_feat_activate_values(struct sock *sk, struct list_head *fn);
+void dccp_feat_list_purge(struct list_head *fn_list);
+
+int dccp_insert_options(struct sock *sk, struct sk_buff *skb);
+int dccp_insert_options_rsk(struct dccp_request_sock *, struct sk_buff *);
+u32 dccp_timestamp(void);
+void dccp_timestamping_init(void);
+int dccp_insert_option(struct sk_buff *skb, unsigned char option,
+ const void *value, unsigned char len);
#ifdef CONFIG_SYSCTL
-extern int dccp_sysctl_init(void);
-extern void dccp_sysctl_exit(void);
+int dccp_sysctl_init(void);
+void dccp_sysctl_exit(void);
#else
static inline int dccp_sysctl_init(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 22:59:08 +0000