#ifndef _INET_CONNECTION_SOCK_H
#define _INET_CONNECTION_SOCK_H
-#include <linux/ip.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
#include <linux/timer.h>
+#include <linux/poll.h>
+
+#include <net/inet_sock.h>
#include <net/request_sock.h>
+#define INET_CSK_DEBUG 1
+
+/* Cancel timers, when they are not required. */
+#undef INET_CSK_CLEAR_TIMERS
+
struct inet_bind_bucket;
-struct inet_hashinfo;
+struct tcp_congestion_ops;
+
+/*
+ * Pointers to address related TCP functions
+ * (i.e. things that depend on the address family)
+ */
+struct inet_connection_sock_af_ops {
+ int (*queue_xmit)(struct sk_buff *skb, int ipfragok);
+ void (*send_check)(struct sock *sk, int len,
+ struct sk_buff *skb);
+ int (*rebuild_header)(struct sock *sk);
+ int (*conn_request)(struct sock *sk, struct sk_buff *skb);
+ struct sock *(*syn_recv_sock)(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct dst_entry *dst);
+ int (*remember_stamp)(struct sock *sk);
+ u16 net_header_len;
+ u16 sockaddr_len;
+ int (*setsockopt)(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen);
+ int (*getsockopt)(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+#ifdef CONFIG_COMPAT
+ int (*compat_setsockopt)(struct sock *sk,
+ int level, int optname,
+ char __user *optval, unsigned int optlen);
+ int (*compat_getsockopt)(struct sock *sk,
+ int level, int optname,
+ char __user *optval, int __user *optlen);
+#endif
+ void (*addr2sockaddr)(struct sock *sk, struct sockaddr *);
+ int (*bind_conflict)(const struct sock *sk,
+ const struct inet_bind_bucket *tb);
+};
/** inet_connection_sock - INET connection oriented sock
*
* @icsk_timeout: Timeout
* @icsk_retransmit_timer: Resend (no ack)
* @icsk_rto: Retransmit timeout
+ * @icsk_pmtu_cookie Last pmtu seen by socket
+ * @icsk_ca_ops Pluggable congestion control hook
+ * @icsk_af_ops Operations which are AF_INET{4,6} specific
+ * @icsk_ca_state: Congestion control state
* @icsk_retransmits: Number of unrecovered [RTO] timeouts
* @icsk_pending: Scheduled timer event
* @icsk_backoff: Backoff
* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
+ * @icsk_probes_out: unanswered 0 window probes
+ * @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
* @icsk_ack: Delayed ACK control data
+ * @icsk_mtup; MTU probing control data
*/
struct inet_connection_sock {
/* inet_sock has to be the first member! */
struct timer_list icsk_retransmit_timer;
struct timer_list icsk_delack_timer;
__u32 icsk_rto;
+ __u32 icsk_pmtu_cookie;
+ const struct tcp_congestion_ops *icsk_ca_ops;
+ const struct inet_connection_sock_af_ops *icsk_af_ops;
+ unsigned int (*icsk_sync_mss)(struct sock *sk, u32 pmtu);
+ __u8 icsk_ca_state;
__u8 icsk_retransmits;
__u8 icsk_pending;
__u8 icsk_backoff;
__u8 icsk_syn_retries;
+ __u8 icsk_probes_out;
+ __u16 icsk_ext_hdr_len;
struct {
__u8 pending; /* ACK is pending */
__u8 quick; /* Scheduled number of quick acks */
__u16 last_seg_size; /* Size of last incoming segment */
__u16 rcv_mss; /* MSS used for delayed ACK decisions */
} icsk_ack;
+ struct {
+ int enabled;
+
+ /* Range of MTUs to search */
+ int search_high;
+ int search_low;
+
+ /* Information on the current probe. */
+ int probe_size;
+ } icsk_mtup;
+ u32 icsk_ca_priv[16];
+#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
};
+#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
+#define ICSK_TIME_DACK 2 /* Delayed ack timer */
+#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
+#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
+
static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
{
return (struct inet_connection_sock *)sk;
}
+static inline void *inet_csk_ca(const struct sock *sk)
+{
+ return (void *)inet_csk(sk)->icsk_ca_priv;
+}
+
+extern struct sock *inet_csk_clone(struct sock *sk,
+ const struct request_sock *req,
+ const gfp_t priority);
+
+enum inet_csk_ack_state_t {
+ ICSK_ACK_SCHED = 1,
+ ICSK_ACK_TIMER = 2,
+ ICSK_ACK_PUSHED = 4,
+ ICSK_ACK_PUSHED2 = 8
+};
+
extern void inet_csk_init_xmit_timers(struct sock *sk,
void (*retransmit_handler)(unsigned long),
void (*delack_handler)(unsigned long),
void (*keepalive_handler)(unsigned long));
extern void inet_csk_clear_xmit_timers(struct sock *sk);
+static inline void inet_csk_schedule_ack(struct sock *sk)
+{
+ inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED;
+}
+
+static inline int inet_csk_ack_scheduled(const struct sock *sk)
+{
+ return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
+}
+
+static inline void inet_csk_delack_init(struct sock *sk)
+{
+ memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
+}
+
+extern void inet_csk_delete_keepalive_timer(struct sock *sk);
+extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
+
+#ifdef INET_CSK_DEBUG
+extern const char inet_csk_timer_bug_msg[];
+#endif
+
+static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
+ icsk->icsk_pending = 0;
+#ifdef INET_CSK_CLEAR_TIMERS
+ sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
+#endif
+ } else if (what == ICSK_TIME_DACK) {
+ icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
+#ifdef INET_CSK_CLEAR_TIMERS
+ sk_stop_timer(sk, &icsk->icsk_delack_timer);
+#endif
+ }
+#ifdef INET_CSK_DEBUG
+ else {
+ pr_debug("%s", inet_csk_timer_bug_msg);
+ }
+#endif
+}
+
+/*
+ * Reset the retransmission timer
+ */
+static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
+ unsigned long when,
+ const unsigned long max_when)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (when > max_when) {
+#ifdef INET_CSK_DEBUG
+ pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
+ sk, what, when, current_text_addr());
+#endif
+ when = max_when;
+ }
+
+ if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
+ icsk->icsk_pending = what;
+ icsk->icsk_timeout = jiffies + when;
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
+ } else if (what == ICSK_TIME_DACK) {
+ icsk->icsk_ack.pending |= ICSK_ACK_TIMER;
+ icsk->icsk_ack.timeout = jiffies + when;
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
+ }
+#ifdef INET_CSK_DEBUG
+ else {
+ pr_debug("%s", inet_csk_timer_bug_msg);
+ }
+#endif
+}
+
+extern struct sock *inet_csk_accept(struct sock *sk, int flags, int *err);
+
extern struct request_sock *inet_csk_search_req(const struct sock *sk,
struct request_sock ***prevp,
- const __u16 rport,
- const __u32 raddr,
- const __u32 laddr);
-extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
- struct sock *sk, unsigned short snum);
+ const __be16 rport,
+ const __be32 raddr,
+ const __be32 laddr);
+extern int inet_csk_bind_conflict(const struct sock *sk,
+ const struct inet_bind_bucket *tb);
+extern int inet_csk_get_port(struct sock *sk, unsigned short snum);
extern struct dst_entry* inet_csk_route_req(struct sock *sk,
const struct request_sock *req);
+static inline void inet_csk_reqsk_queue_add(struct sock *sk,
+ struct request_sock *req,
+ struct sock *child)
+{
+ reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
+}
+
+extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
+ struct request_sock *req,
+ unsigned long timeout);
+
+static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
+ struct request_sock *req)
+{
+ if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
+ inet_csk_delete_keepalive_timer(sk);
+}
+
+static inline void inet_csk_reqsk_queue_added(struct sock *sk,
+ const unsigned long timeout)
+{
+ if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
+ inet_csk_reset_keepalive_timer(sk, timeout);
+}
+
+static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
+{
+ return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
+}
+
+static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
+{
+ return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
+}
+
+static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
+{
+ return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
+}
+
+static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
+ struct request_sock *req,
+ struct request_sock **prev)
+{
+ reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
+}
+
+static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
+ struct request_sock *req,
+ struct request_sock **prev)
+{
+ inet_csk_reqsk_queue_unlink(sk, req, prev);
+ inet_csk_reqsk_queue_removed(sk, req);
+ reqsk_free(req);
+}
+
+extern void inet_csk_reqsk_queue_prune(struct sock *parent,
+ const unsigned long interval,
+ const unsigned long timeout,
+ const unsigned long max_rto);
+
+extern void inet_csk_destroy_sock(struct sock *sk);
+
+/*
+ * LISTEN is a special case for poll..
+ */
+static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
+{
+ return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
+ (POLLIN | POLLRDNORM) : 0;
+}
+
+extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
+extern void inet_csk_listen_stop(struct sock *sk);
+
+extern void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);
+
+extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen);
#endif /* _INET_CONNECTION_SOCK_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff