#include <linux/skbuff.h>
#include <linux/dmaengine.h>
#include <linux/crypto.h>
+#include <linux/cryptohash.h>
#include <net/inet_connection_sock.h>
#include <net/inet_timewait_sock.h>
extern struct inet_hashinfo tcp_hashinfo;
-extern atomic_t tcp_orphan_count;
+extern struct percpu_counter tcp_orphan_count;
extern void tcp_time_wait(struct sock *sk, int state, int timeo);
#define MAX_TCP_HEADER (128 + MAX_HEADER)
+#define MAX_TCP_OPTION_SPACE 40
/*
* Never offer a window over 32767 without using window scaling. Some
#define TCPOLEN_SACK_BASE_ALIGNED 4
#define TCPOLEN_SACK_PERBLOCK 8
#define TCPOLEN_MD5SIG_ALIGNED 20
+#define TCPOLEN_MSS_ALIGNED 4
/* Flags in tp->nonagle */
#define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */
extern int sysctl_tcp_max_ssthresh;
extern atomic_t tcp_memory_allocated;
-extern atomic_t tcp_sockets_allocated;
+extern struct percpu_counter tcp_sockets_allocated;
extern int tcp_memory_pressure;
/*
extern struct proto tcp_prot;
-DECLARE_SNMP_STAT(struct tcp_mib, tcp_statistics);
-#define TCP_INC_STATS(field) SNMP_INC_STATS(tcp_statistics, field)
-#define TCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(tcp_statistics, field)
-#define TCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(tcp_statistics, field)
-#define TCP_DEC_STATS(field) SNMP_DEC_STATS(tcp_statistics, field)
-#define TCP_ADD_STATS_BH(field, val) SNMP_ADD_STATS_BH(tcp_statistics, field, val)
-#define TCP_ADD_STATS_USER(field, val) SNMP_ADD_STATS_USER(tcp_statistics, field, val)
+#define TCP_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
+#define TCP_DEC_STATS(net, field) SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
+#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
extern void tcp_v4_err(struct sk_buff *skb, u32);
struct tcp_options_received *opt_rx,
int estab);
+extern u8 *tcp_parse_md5sig_option(struct tcphdr *th);
+
/*
* TCP v4 functions exported for the inet6 API
*/
extern int tcp_disconnect(struct sock *sk, int flags);
-extern void tcp_unhash(struct sock *sk);
/* From syncookies.c */
+extern __u32 syncookie_secret[2][16-4+SHA_DIGEST_WORDS];
extern struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
struct ip_options *opt);
extern __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb,
__u16 *mss);
+extern __u32 cookie_init_timestamp(struct request_sock *req);
+extern void cookie_check_timestamp(struct tcp_options_received *tcp_opt);
+
+/* From net/ipv6/syncookies.c */
+extern struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb);
+extern __u32 cookie_v6_init_sequence(struct sock *sk, struct sk_buff *skb,
+ __u16 *mss);
+
/* tcp_output.c */
extern void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
}
extern unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
-extern unsigned int tcp_current_mss(struct sock *sk, int large);
+extern unsigned int tcp_current_mss(struct sock *sk);
+
+/* Bound MSS / TSO packet size with the half of the window */
+static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
+{
+ if (tp->max_window && pktsize > (tp->max_window >> 1))
+ return max(tp->max_window >> 1, 68U - tp->tcp_header_len);
+ else
+ return pktsize;
+}
/* tcp.c */
extern void tcp_get_info(struct sock *, struct tcp_info *);
#define TCPCB_EVER_RETRANS 0x80 /* Ever retransmitted frame */
#define TCPCB_RETRANS (TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
-#define TCPCB_URG 0x20 /* Urgent pointer advanced here */
-
-#define TCPCB_AT_TAIL (TCPCB_URG)
-
- __u16 urg_ptr; /* Valid w/URG flags is set. */
__u32 ack_seq; /* Sequence number ACK'd */
};
extern int tcp_set_allowed_congestion_control(char *allowed);
extern int tcp_set_congestion_control(struct sock *sk, const char *name);
extern void tcp_slow_start(struct tcp_sock *tp);
+extern void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w);
extern struct tcp_congestion_ops tcp_init_congestion_ops;
extern u32 tcp_reno_ssthresh(struct sock *sk);
extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst);
/* Slow start with delack produces 3 packets of burst, so that
- * it is safe "de facto".
+ * it is safe "de facto". This will be the default - same as
+ * the default reordering threshold - but if reordering increases,
+ * we must be able to allow cwnd to burst at least this much in order
+ * to not pull it back when holes are filled.
*/
static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
{
- return 3;
+ return tp->reordering;
}
/* Returns end sequence number of the receiver's advertised window */
{
return tp->snd_una + tp->snd_wnd;
}
-
-/* RFC2861 Check whether we are limited by application or congestion window
- * This is the inverse of cwnd check in tcp_tso_should_defer
- */
-static inline int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
-{
- const struct tcp_sock *tp = tcp_sk(sk);
- u32 left;
-
- if (in_flight >= tp->snd_cwnd)
- return 1;
-
- if (!sk_can_gso(sk))
- return 0;
-
- left = tp->snd_cwnd - in_flight;
- if (sysctl_tcp_tso_win_divisor)
- return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd;
- else
- return left <= tcp_max_burst(tp);
-}
+extern int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
static inline void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss,
const struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
- __tcp_push_pending_frames(sk, tcp_current_mss(sk, 1), tp->nonagle);
+ __tcp_push_pending_frames(sk, tcp_current_mss(sk), tp->nonagle);
}
-static inline void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq)
+static inline void tcp_init_wl(struct tcp_sock *tp, u32 seq)
{
tp->snd_wl1 = seq;
}
-static inline void tcp_update_wl(struct tcp_sock *tp, u32 ack, u32 seq)
+static inline void tcp_update_wl(struct tcp_sock *tp, u32 seq)
{
tp->snd_wl1 = seq;
}
BUG_ON(sock_owned_by_user(sk));
while ((skb1 = __skb_dequeue(&tp->ucopy.prequeue)) != NULL) {
- sk->sk_backlog_rcv(sk, skb1);
- NET_INC_STATS_BH(LINUX_MIB_TCPPREQUEUEDROPPED);
+ sk_backlog_rcv(sk, skb1);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPPREQUEUEDROPPED);
}
tp->ucopy.memory = 0;
"Close Wait","Last ACK","Listen","Closing"
};
#endif
-
-static inline void tcp_set_state(struct sock *sk, int state)
-{
- int oldstate = sk->sk_state;
-
- switch (state) {
- case TCP_ESTABLISHED:
- if (oldstate != TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_CURRESTAB);
- break;
-
- case TCP_CLOSE:
- if (oldstate == TCP_CLOSE_WAIT || oldstate == TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_ESTABRESETS);
-
- sk->sk_prot->unhash(sk);
- if (inet_csk(sk)->icsk_bind_hash &&
- !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
- inet_put_port(&tcp_hashinfo, sk);
- /* fall through */
- default:
- if (oldstate==TCP_ESTABLISHED)
- TCP_DEC_STATS(TCP_MIB_CURRESTAB);
- }
-
- /* Change state AFTER socket is unhashed to avoid closed
- * socket sitting in hash tables.
- */
- sk->sk_state = state;
-
-#ifdef STATE_TRACE
- SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n",sk, statename[oldstate],statename[state]);
-#endif
-}
+extern void tcp_set_state(struct sock *sk, int state);
extern void tcp_done(struct sock *sk);
static inline void tcp_sack_reset(struct tcp_options_received *rx_opt)
{
rx_opt->dsack = 0;
- rx_opt->eff_sacks = 0;
rx_opt->num_sacks = 0;
}
struct inet_request_sock *ireq = inet_rsk(req);
req->rcv_wnd = 0; /* So that tcp_send_synack() knows! */
+ req->cookie_ts = 0;
tcp_rsk(req)->rcv_isn = TCP_SKB_CB(skb)->seq;
req->mss = rx_opt->mss_clamp;
req->ts_recent = rx_opt->saw_tstamp ? rx_opt->rcv_tsval : 0;
ireq->acked = 0;
ireq->ecn_ok = 0;
ireq->rmt_port = tcp_hdr(skb)->source;
+ ireq->loc_port = tcp_hdr(skb)->dest;
}
-extern void tcp_enter_memory_pressure(void);
+extern void tcp_enter_memory_pressure(struct sock *sk);
static inline int keepalive_intvl_when(const struct tcp_sock *tp)
{
return fin_timeout;
}
-static inline int tcp_paws_check(const struct tcp_options_received *rx_opt, int rst)
+static inline int tcp_paws_check(const struct tcp_options_received *rx_opt,
+ int paws_win)
{
- if ((s32)(rx_opt->rcv_tsval - rx_opt->ts_recent) >= 0)
- return 0;
- if (get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS)
+ if ((s32)(rx_opt->ts_recent - rx_opt->rcv_tsval) <= paws_win)
+ return 1;
+ if (unlikely(get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS))
+ return 1;
+
+ return 0;
+}
+
+static inline int tcp_paws_reject(const struct tcp_options_received *rx_opt,
+ int rst)
+{
+ if (tcp_paws_check(rx_opt, 0))
return 0;
/* RST segments are not recommended to carry timestamp,
#define TCP_CHECK_TIMER(sk) do { } while (0)
-static inline void tcp_mib_init(void)
+static inline void tcp_mib_init(struct net *net)
{
/* See RFC 2012 */
- TCP_ADD_STATS_USER(TCP_MIB_RTOALGORITHM, 1);
- TCP_ADD_STATS_USER(TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
- TCP_ADD_STATS_USER(TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
- TCP_ADD_STATS_USER(TCP_MIB_MAXCONN, -1);
+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOALGORITHM, 1);
+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
+ TCP_ADD_STATS_USER(net, TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
+ TCP_ADD_STATS_USER(net, TCP_MIB_MAXCONN, -1);
}
/* from STCP */
{
tp->lost_skb_hint = NULL;
tp->scoreboard_skb_hint = NULL;
- tp->retransmit_skb_hint = NULL;
- tp->forward_skb_hint = NULL;
}
static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
{
tcp_clear_retrans_hints_partial(tp);
+ tp->retransmit_skb_hint = NULL;
}
/* MD5 Signature */
#define TCP_MD5SIG_MAXKEYS (~(u32)0) /* really?! */
/* - functions */
-extern int tcp_v4_calc_md5_hash(char *md5_hash,
- struct tcp_md5sig_key *key,
- struct sock *sk,
- struct dst_entry *dst,
- struct request_sock *req,
- struct tcphdr *th,
- int protocol,
- unsigned int tcplen);
+extern int tcp_v4_md5_hash_skb(char *md5_hash,
+ struct tcp_md5sig_key *key,
+ struct sock *sk,
+ struct request_sock *req,
+ struct sk_buff *skb);
+
extern struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk,
struct sock *addr_sk);
extern int tcp_v4_md5_do_del(struct sock *sk,
__be32 addr);
+#ifdef CONFIG_TCP_MD5SIG
+#define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_keylen ? \
+ &(struct tcp_md5sig_key) { \
+ .key = (twsk)->tw_md5_key, \
+ .keylen = (twsk)->tw_md5_keylen, \
+ } : NULL)
+#else
+#define tcp_twsk_md5_key(twsk) NULL
+#endif
+
extern struct tcp_md5sig_pool **tcp_alloc_md5sig_pool(void);
extern void tcp_free_md5sig_pool(void);
extern struct tcp_md5sig_pool *__tcp_get_md5sig_pool(int cpu);
extern void __tcp_put_md5sig_pool(void);
+extern int tcp_md5_hash_header(struct tcp_md5sig_pool *, struct tcphdr *);
+extern int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, struct sk_buff *,
+ unsigned header_len);
+extern int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
+ struct tcp_md5sig_key *key);
static inline
struct tcp_md5sig_pool *tcp_get_md5sig_pool(void)
static inline struct sk_buff *tcp_write_queue_head(struct sock *sk)
{
- struct sk_buff *skb = sk->sk_write_queue.next;
- if (skb == (struct sk_buff *) &sk->sk_write_queue)
- return NULL;
- return skb;
+ return skb_peek(&sk->sk_write_queue);
}
static inline struct sk_buff *tcp_write_queue_tail(struct sock *sk)
{
- struct sk_buff *skb = sk->sk_write_queue.prev;
- if (skb == (struct sk_buff *) &sk->sk_write_queue)
- return NULL;
- return skb;
+ return skb_peek_tail(&sk->sk_write_queue);
}
static inline struct sk_buff *tcp_write_queue_next(struct sock *sk, struct sk_buff *skb)
{
- return skb->next;
+ return skb_queue_next(&sk->sk_write_queue, skb);
+}
+
+static inline struct sk_buff *tcp_write_queue_prev(struct sock *sk, struct sk_buff *skb)
+{
+ return skb_queue_prev(&sk->sk_write_queue, skb);
}
#define tcp_for_write_queue(skb, sk) \
- for (skb = (sk)->sk_write_queue.next; \
- (skb != (struct sk_buff *)&(sk)->sk_write_queue); \
- skb = skb->next)
+ skb_queue_walk(&(sk)->sk_write_queue, skb)
#define tcp_for_write_queue_from(skb, sk) \
- for (; (skb != (struct sk_buff *)&(sk)->sk_write_queue);\
- skb = skb->next)
+ skb_queue_walk_from(&(sk)->sk_write_queue, skb)
#define tcp_for_write_queue_from_safe(skb, tmp, sk) \
- for (tmp = skb->next; \
- (skb != (struct sk_buff *)&(sk)->sk_write_queue); \
- skb = tmp, tmp = skb->next)
+ skb_queue_walk_from_safe(&(sk)->sk_write_queue, skb, tmp)
static inline struct sk_buff *tcp_send_head(struct sock *sk)
{
return sk->sk_send_head;
}
+static inline bool tcp_skb_is_last(const struct sock *sk,
+ const struct sk_buff *skb)
+{
+ return skb_queue_is_last(&sk->sk_write_queue, skb);
+}
+
static inline void tcp_advance_send_head(struct sock *sk, struct sk_buff *skb)
{
- sk->sk_send_head = skb->next;
- if (sk->sk_send_head == (struct sk_buff *)&sk->sk_write_queue)
+ if (tcp_skb_is_last(sk, skb))
sk->sk_send_head = NULL;
+ else
+ sk->sk_send_head = tcp_write_queue_next(sk, skb);
}
static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unlinked)
struct sk_buff *buff,
struct sock *sk)
{
- __skb_append(skb, buff, &sk->sk_write_queue);
+ __skb_queue_after(&sk->sk_write_queue, skb, buff);
}
-/* Insert skb between prev and next on the write queue of sk. */
+/* Insert new before skb on the write queue of sk. */
static inline void tcp_insert_write_queue_before(struct sk_buff *new,
struct sk_buff *skb,
struct sock *sk)
{
- __skb_insert(new, skb->prev, skb, &sk->sk_write_queue);
+ __skb_queue_before(&sk->sk_write_queue, skb, new);
if (sk->sk_send_head == skb)
sk->sk_send_head = new;
__skb_unlink(skb, &sk->sk_write_queue);
}
-static inline int tcp_skb_is_last(const struct sock *sk,
- const struct sk_buff *skb)
-{
- return skb->next == (struct sk_buff *)&sk->sk_write_queue;
-}
-
static inline int tcp_write_queue_empty(struct sock *sk)
{
return skb_queue_empty(&sk->sk_write_queue);
};
struct tcp_seq_afinfo {
- struct module *owner;
char *name;
sa_family_t family;
- int (*seq_show) (struct seq_file *m, void *v);
- struct file_operations *seq_fops;
+ struct file_operations seq_fops;
+ struct seq_operations seq_ops;
};
struct tcp_iter_state {
+ struct seq_net_private p;
sa_family_t family;
enum tcp_seq_states state;
struct sock *syn_wait_sk;
int bucket, sbucket, num, uid;
- struct seq_operations seq_ops;
};
-extern int tcp_proc_register(struct tcp_seq_afinfo *afinfo);
-extern void tcp_proc_unregister(struct tcp_seq_afinfo *afinfo);
+extern int tcp_proc_register(struct net *net, struct tcp_seq_afinfo *afinfo);
+extern void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo);
extern struct request_sock_ops tcp_request_sock_ops;
+extern struct request_sock_ops tcp6_request_sock_ops;
-extern int tcp_v4_destroy_sock(struct sock *sk);
+extern void tcp_v4_destroy_sock(struct sock *sk);
extern int tcp_v4_gso_send_check(struct sk_buff *skb);
extern struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features);
+extern struct sk_buff **tcp_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb);
+extern struct sk_buff **tcp4_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb);
+extern int tcp_gro_complete(struct sk_buff *skb);
+extern int tcp4_gro_complete(struct sk_buff *skb);
#ifdef CONFIG_PROC_FS
extern int tcp4_proc_init(void);
int (*calc_md5_hash) (char *location,
struct tcp_md5sig_key *md5,
struct sock *sk,
- struct dst_entry *dst,
struct request_sock *req,
- struct tcphdr *th,
- int protocol,
- unsigned int len);
+ struct sk_buff *skb);
int (*md5_add) (struct sock *sk,
struct sock *addr_sk,
u8 *newkey,
#endif
};
-extern void tcp_v4_init(struct net_proto_family *ops);
+extern void tcp_v4_init(void);
extern void tcp_init(void);
#endif /* _TCP_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff