#define TCP_DEBUG 1
#define FASTRETRANS_DEBUG 1
-/* Cancel timers, when they are not required. */
-#undef TCP_CLEAR_TIMERS
-
-#include <linux/config.h>
#include <linux/list.h>
#include <linux/tcp.h>
#include <linux/slab.h>
#include <linux/cache.h>
#include <linux/percpu.h>
+#include <linux/skbuff.h>
+#include <linux/dmaengine.h>
+#include <linux/crypto.h>
+
+#include <net/inet_connection_sock.h>
+#include <net/inet_timewait_sock.h>
+#include <net/inet_hashtables.h>
#include <net/checksum.h>
#include <net/request_sock.h>
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ip.h>
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-#include <linux/ipv6.h>
-#endif
-#include <linux/seq_file.h>
-
-/* This is for all connections with a full identity, no wildcards.
- * New scheme, half the table is for TIME_WAIT, the other half is
- * for the rest. I'll experiment with dynamic table growth later.
- */
-struct inet_ehash_bucket {
- rwlock_t lock;
- struct hlist_head chain;
-} __attribute__((__aligned__(8)));
-
-/* This is for listening sockets, thus all sockets which possess wildcards. */
-#define INET_LHTABLE_SIZE 32 /* Yes, really, this is all you need. */
-
-/* There are a few simple rules, which allow for local port reuse by
- * an application. In essence:
- *
- * 1) Sockets bound to different interfaces may share a local port.
- * Failing that, goto test 2.
- * 2) If all sockets have sk->sk_reuse set, and none of them are in
- * TCP_LISTEN state, the port may be shared.
- * Failing that, goto test 3.
- * 3) If all sockets are bound to a specific inet_sk(sk)->rcv_saddr local
- * address, and none of them are the same, the port may be
- * shared.
- * Failing this, the port cannot be shared.
- *
- * The interesting point, is test #2. This is what an FTP server does
- * all day. To optimize this case we use a specific flag bit defined
- * below. As we add sockets to a bind bucket list, we perform a
- * check of: (newsk->sk_reuse && (newsk->sk_state != TCP_LISTEN))
- * As long as all sockets added to a bind bucket pass this test,
- * the flag bit will be set.
- * The resulting situation is that tcp_v[46]_verify_bind() can just check
- * for this flag bit, if it is set and the socket trying to bind has
- * sk->sk_reuse set, we don't even have to walk the owners list at all,
- * we return that it is ok to bind this socket to the requested local port.
- *
- * Sounds like a lot of work, but it is worth it. In a more naive
- * implementation (ie. current FreeBSD etc.) the entire list of ports
- * must be walked for each data port opened by an ftp server. Needless
- * to say, this does not scale at all. With a couple thousand FTP
- * users logged onto your box, isn't it nice to know that new data
- * ports are created in O(1) time? I thought so. ;-) -DaveM
- */
-struct inet_bind_bucket {
- unsigned short port;
- signed short fastreuse;
- struct hlist_node node;
- struct hlist_head owners;
-};
-
-#define inet_bind_bucket_for_each(tb, node, head) \
- hlist_for_each_entry(tb, node, head, node)
-
-struct inet_bind_hashbucket {
- spinlock_t lock;
- struct hlist_head chain;
-};
-
-struct inet_hashinfo {
- /* This is for sockets with full identity only. Sockets here will
- * always be without wildcards and will have the following invariant:
- *
- * TCP_ESTABLISHED <= sk->sk_state < TCP_CLOSE
- *
- * First half of the table is for sockets not in TIME_WAIT, second half
- * is for TIME_WAIT sockets only.
- */
- struct inet_ehash_bucket *ehash;
-
- /* Ok, let's try this, I give up, we do need a local binding
- * TCP hash as well as the others for fast bind/connect.
- */
- struct inet_bind_hashbucket *bhash;
-
- int bhash_size;
- int ehash_size;
-
- /* All sockets in TCP_LISTEN state will be in here. This is the only
- * table where wildcard'd TCP sockets can exist. Hash function here
- * is just local port number.
- */
- struct hlist_head listening_hash[INET_LHTABLE_SIZE];
-
- /* All the above members are written once at bootup and
- * never written again _or_ are predominantly read-access.
- *
- * Now align to a new cache line as all the following members
- * are often dirty.
- */
- rwlock_t lhash_lock ____cacheline_aligned;
- atomic_t lhash_users;
- wait_queue_head_t lhash_wait;
- spinlock_t portalloc_lock;
-};
-
-extern struct inet_hashinfo tcp_hashinfo;
-#define tcp_ehash (tcp_hashinfo.ehash)
-#define tcp_bhash (tcp_hashinfo.bhash)
-#define tcp_ehash_size (tcp_hashinfo.ehash_size)
-#define tcp_bhash_size (tcp_hashinfo.bhash_size)
-#define tcp_listening_hash (tcp_hashinfo.listening_hash)
-#define tcp_lhash_lock (tcp_hashinfo.lhash_lock)
-#define tcp_lhash_users (tcp_hashinfo.lhash_users)
-#define tcp_lhash_wait (tcp_hashinfo.lhash_wait)
-#define tcp_portalloc_lock (tcp_hashinfo.portalloc_lock)
-
-extern kmem_cache_t *tcp_bucket_cachep;
-extern struct inet_bind_bucket *
- inet_bind_bucket_create(kmem_cache_t *cachep,
- struct inet_bind_hashbucket *head,
- const unsigned short snum);
-extern void inet_bind_bucket_destroy(kmem_cache_t *cachep,
- struct inet_bind_bucket *tb);
-extern int tcp_port_rover;
-
-/* These are AF independent. */
-static inline int inet_bhashfn(const __u16 lport, const int bhash_size)
-{
- return lport & (bhash_size - 1);
-}
-
-extern void tcp_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
- unsigned short snum);
-
-#if (BITS_PER_LONG == 64)
-#define TCP_ADDRCMP_ALIGN_BYTES 8
-#else
-#define TCP_ADDRCMP_ALIGN_BYTES 4
-#endif
-
-/* This is a TIME_WAIT bucket. It works around the memory consumption
- * problems of sockets in such a state on heavily loaded servers, but
- * without violating the protocol specification.
- */
-struct tcp_tw_bucket {
- /*
- * Now struct sock also uses sock_common, so please just
- * don't add nothing before this first member (__tw_common) --acme
- */
- struct sock_common __tw_common;
-#define tw_family __tw_common.skc_family
-#define tw_state __tw_common.skc_state
-#define tw_reuse __tw_common.skc_reuse
-#define tw_bound_dev_if __tw_common.skc_bound_dev_if
-#define tw_node __tw_common.skc_node
-#define tw_bind_node __tw_common.skc_bind_node
-#define tw_refcnt __tw_common.skc_refcnt
- volatile unsigned char tw_substate;
- unsigned char tw_rcv_wscale;
- __u16 tw_sport;
- /* Socket demultiplex comparisons on incoming packets. */
- /* these five are in inet_sock */
- __u32 tw_daddr
- __attribute__((aligned(TCP_ADDRCMP_ALIGN_BYTES)));
- __u32 tw_rcv_saddr;
- __u16 tw_dport;
- __u16 tw_num;
- /* And these are ours. */
- int tw_hashent;
- int tw_timeout;
- __u32 tw_rcv_nxt;
- __u32 tw_snd_nxt;
- __u32 tw_rcv_wnd;
- __u32 tw_ts_recent;
- long tw_ts_recent_stamp;
- unsigned long tw_ttd;
- struct inet_bind_bucket *tw_tb;
- struct hlist_node tw_death_node;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
- struct in6_addr tw_v6_daddr;
- struct in6_addr tw_v6_rcv_saddr;
- int tw_v6_ipv6only;
-#endif
-};
-
-static __inline__ void tw_add_node(struct tcp_tw_bucket *tw,
- struct hlist_head *list)
-{
- hlist_add_head(&tw->tw_node, list);
-}
-
-static __inline__ void tw_add_bind_node(struct tcp_tw_bucket *tw,
- struct hlist_head *list)
-{
- hlist_add_head(&tw->tw_bind_node, list);
-}
-
-static inline int tw_dead_hashed(struct tcp_tw_bucket *tw)
-{
- return tw->tw_death_node.pprev != NULL;
-}
-
-static __inline__ void tw_dead_node_init(struct tcp_tw_bucket *tw)
-{
- tw->tw_death_node.pprev = NULL;
-}
-
-static __inline__ void __tw_del_dead_node(struct tcp_tw_bucket *tw)
-{
- __hlist_del(&tw->tw_death_node);
- tw_dead_node_init(tw);
-}
-
-static __inline__ int tw_del_dead_node(struct tcp_tw_bucket *tw)
-{
- if (tw_dead_hashed(tw)) {
- __tw_del_dead_node(tw);
- return 1;
- }
- return 0;
-}
-
-#define tw_for_each(tw, node, head) \
- hlist_for_each_entry(tw, node, head, tw_node)
-
-#define tw_for_each_inmate(tw, node, jail) \
- hlist_for_each_entry(tw, node, jail, tw_death_node)
-
-#define tw_for_each_inmate_safe(tw, node, safe, jail) \
- hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node)
-
-#define tcptw_sk(__sk) ((struct tcp_tw_bucket *)(__sk))
-
-static inline u32 tcp_v4_rcv_saddr(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- inet_sk(sk)->rcv_saddr : tcptw_sk(sk)->tw_rcv_saddr;
-}
-
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- &inet6_sk(sk)->rcv_saddr : &tcptw_sk(sk)->tw_v6_rcv_saddr;
-}
-
-static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
-{
- return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
-}
-
-#define tcptw_sk_ipv6only(__sk) (tcptw_sk(__sk)->tw_v6_ipv6only)
+#include <net/tcp_states.h>
-static inline int tcp_v6_ipv6only(const struct sock *sk)
-{
- return likely(sk->sk_state != TCP_TIME_WAIT) ?
- ipv6_only_sock(sk) : tcptw_sk_ipv6only(sk);
-}
-#else
-# define __tcp_v6_rcv_saddr(__sk) NULL
-# define tcp_v6_rcv_saddr(__sk) NULL
-# define tcptw_sk_ipv6only(__sk) 0
-# define tcp_v6_ipv6only(__sk) 0
-#endif
-
-extern kmem_cache_t *tcp_timewait_cachep;
+#include <linux/seq_file.h>
-static inline void tcp_tw_put(struct tcp_tw_bucket *tw)
-{
- if (atomic_dec_and_test(&tw->tw_refcnt)) {
-#ifdef SOCK_REFCNT_DEBUG
- printk(KERN_DEBUG "tw_bucket %p released\n", tw);
-#endif
- kmem_cache_free(tcp_timewait_cachep, tw);
- }
-}
+extern struct inet_hashinfo tcp_hashinfo;
extern atomic_t tcp_orphan_count;
-extern int tcp_tw_count;
extern void tcp_time_wait(struct sock *sk, int state, int timeo);
-extern void tcp_tw_deschedule(struct tcp_tw_bucket *tw);
-
-
-/* Socket demux engine toys. */
-#ifdef __BIG_ENDIAN
-#define TCP_COMBINED_PORTS(__sport, __dport) \
- (((__u32)(__sport)<<16) | (__u32)(__dport))
-#else /* __LITTLE_ENDIAN */
-#define TCP_COMBINED_PORTS(__sport, __dport) \
- (((__u32)(__dport)<<16) | (__u32)(__sport))
-#endif
-
-#if (BITS_PER_LONG == 64)
-#ifdef __BIG_ENDIAN
-#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr) \
- __u64 __name = (((__u64)(__saddr))<<32)|((__u64)(__daddr));
-#else /* __LITTLE_ENDIAN */
-#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr) \
- __u64 __name = (((__u64)(__daddr))<<32)|((__u64)(__saddr));
-#endif /* __BIG_ENDIAN */
-#define TCP_IPV4_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
- (((*((__u64 *)&(inet_sk(__sk)->daddr)))== (__cookie)) && \
- ((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
- (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#define TCP_IPV4_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
- (((*((__u64 *)&(tcptw_sk(__sk)->tw_daddr))) == (__cookie)) && \
- ((*((__u32 *)&(tcptw_sk(__sk)->tw_dport))) == (__ports)) && \
- (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#else /* 32-bit arch */
-#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr)
-#define TCP_IPV4_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
- ((inet_sk(__sk)->daddr == (__saddr)) && \
- (inet_sk(__sk)->rcv_saddr == (__daddr)) && \
- ((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
- (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#define TCP_IPV4_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
- ((tcptw_sk(__sk)->tw_daddr == (__saddr)) && \
- (tcptw_sk(__sk)->tw_rcv_saddr == (__daddr)) && \
- ((*((__u32 *)&(tcptw_sk(__sk)->tw_dport))) == (__ports)) && \
- (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#endif /* 64-bit arch */
-
-#define TCP_IPV6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
- (((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
- ((__sk)->sk_family == AF_INET6) && \
- ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
- ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
- (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-
-/* These can have wildcards, don't try too hard. */
-static inline int inet_lhashfn(const unsigned short num)
-{
- return num & (INET_LHTABLE_SIZE - 1);
-}
-
-static inline int inet_sk_listen_hashfn(const struct sock *sk)
-{
- return inet_lhashfn(inet_sk(sk)->num);
-}
#define MAX_TCP_HEADER (128 + MAX_HEADER)
/* Minimal RCV_MSS. */
#define TCP_MIN_RCVMSS 536U
+/* The least MTU to use for probing */
+#define TCP_BASE_MSS 512
+
/* After receiving this amount of duplicate ACKs fast retransmit starts. */
#define TCP_FASTRETRANS_THRESH 3
*/
#define TCP_SYN_RETRIES 5 /* number of times to retry active opening a
- * connection: ~180sec is RFC minumum */
+ * connection: ~180sec is RFC minimum */
#define TCP_SYNACK_RETRIES 5 /* number of times to retry passive opening a
- * connection: ~180sec is RFC minumum */
+ * connection: ~180sec is RFC minimum */
#define TCP_ORPHAN_RETRIES 7 /* number of times to retry on an orphaned
#define MAX_TCP_SYNCNT 127
#define TCP_SYNQ_INTERVAL (HZ/5) /* Period of SYNACK timer */
-#define TCP_SYNQ_HSIZE 512 /* Size of SYNACK hash table */
#define TCP_PAWS_24DAYS (60 * 60 * 24 * 24)
#define TCP_PAWS_MSL 60 /* Per-host timestamps are invalidated
* timestamps. It must be less than
* minimal timewait lifetime.
*/
-
-#define TCP_TW_RECYCLE_SLOTS_LOG 5
-#define TCP_TW_RECYCLE_SLOTS (1<<TCP_TW_RECYCLE_SLOTS_LOG)
-
-/* If time > 4sec, it is "slow" path, no recycling is required,
- so that we select tick to get range about 4 seconds.
- */
-
-#if HZ <= 16 || HZ > 4096
-# error Unsupported: HZ <= 16 or HZ > 4096
-#elif HZ <= 32
-# define TCP_TW_RECYCLE_TICK (5+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 64
-# define TCP_TW_RECYCLE_TICK (6+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 128
-# define TCP_TW_RECYCLE_TICK (7+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 256
-# define TCP_TW_RECYCLE_TICK (8+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 512
-# define TCP_TW_RECYCLE_TICK (9+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 1024
-# define TCP_TW_RECYCLE_TICK (10+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#elif HZ <= 2048
-# define TCP_TW_RECYCLE_TICK (11+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#else
-# define TCP_TW_RECYCLE_TICK (12+2-TCP_TW_RECYCLE_SLOTS_LOG)
-#endif
/*
* TCP option
*/
#define TCPOPT_SACK_PERM 4 /* SACK Permitted */
#define TCPOPT_SACK 5 /* SACK Block */
#define TCPOPT_TIMESTAMP 8 /* Better RTT estimations/PAWS */
+#define TCPOPT_MD5SIG 19 /* MD5 Signature (RFC2385) */
/*
* TCP option lengths
#define TCPOLEN_WINDOW 3
#define TCPOLEN_SACK_PERM 2
#define TCPOLEN_TIMESTAMP 10
+#define TCPOLEN_MD5SIG 18
/* But this is what stacks really send out. */
#define TCPOLEN_TSTAMP_ALIGNED 12
#define TCPOLEN_SACK_BASE 2
#define TCPOLEN_SACK_BASE_ALIGNED 4
#define TCPOLEN_SACK_PERBLOCK 8
-
-#define TCP_TIME_RETRANS 1 /* Retransmit timer */
-#define TCP_TIME_DACK 2 /* Delayed ack timer */
-#define TCP_TIME_PROBE0 3 /* Zero window probe timer */
-#define TCP_TIME_KEEPOPEN 4 /* Keepalive timer */
+#define TCPOLEN_MD5SIG_ALIGNED 20
/* Flags in tp->nonagle */
#define TCP_NAGLE_OFF 1 /* Nagle's algo is disabled */
#define TCP_NAGLE_CORK 2 /* Socket is corked */
-#define TCP_NAGLE_PUSH 4 /* Cork is overriden for already queued data */
+#define TCP_NAGLE_PUSH 4 /* Cork is overridden for already queued data */
+
+extern struct inet_timewait_death_row tcp_death_row;
/* sysctl variables for tcp */
extern int sysctl_tcp_timestamps;
extern int sysctl_tcp_window_scaling;
extern int sysctl_tcp_sack;
extern int sysctl_tcp_fin_timeout;
-extern int sysctl_tcp_tw_recycle;
extern int sysctl_tcp_keepalive_time;
extern int sysctl_tcp_keepalive_probes;
extern int sysctl_tcp_keepalive_intvl;
extern int sysctl_tcp_rfc1337;
extern int sysctl_tcp_abort_on_overflow;
extern int sysctl_tcp_max_orphans;
-extern int sysctl_tcp_max_tw_buckets;
extern int sysctl_tcp_fack;
extern int sysctl_tcp_reordering;
extern int sysctl_tcp_ecn;
extern int sysctl_tcp_tw_reuse;
extern int sysctl_tcp_frto;
extern int sysctl_tcp_low_latency;
+extern int sysctl_tcp_dma_copybreak;
extern int sysctl_tcp_nometrics_save;
extern int sysctl_tcp_moderate_rcvbuf;
extern int sysctl_tcp_tso_win_divisor;
+extern int sysctl_tcp_abc;
+extern int sysctl_tcp_mtu_probing;
+extern int sysctl_tcp_base_mss;
+extern int sysctl_tcp_workaround_signed_windows;
+extern int sysctl_tcp_slow_start_after_idle;
extern atomic_t tcp_memory_allocated;
extern atomic_t tcp_sockets_allocated;
extern int tcp_memory_pressure;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-#define TCP_INET_FAMILY(fam) ((fam) == AF_INET)
-#else
-#define TCP_INET_FAMILY(fam) 1
-#endif
-
-/*
- * Pointers to address related TCP functions
- * (i.e. things that depend on the address family)
- */
-
-struct tcp_func {
- int (*queue_xmit) (struct sk_buff *skb,
- int ipfragok);
-
- void (*send_check) (struct sock *sk,
- struct tcphdr *th,
- 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;
-
- int (*setsockopt) (struct sock *sk,
- int level,
- int optname,
- char __user *optval,
- int optlen);
-
- int (*getsockopt) (struct sock *sk,
- int level,
- int optname,
- char __user *optval,
- int __user *optlen);
-
-
- void (*addr2sockaddr) (struct sock *sk,
- struct sockaddr *);
-
- int sockaddr_len;
-};
-
/*
* The next routines deal with comparing 32 bit unsigned ints
* and worry about wraparound (automatic with unsigned arithmetic).
#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)
-extern void tcp_put_port(struct sock *sk);
-extern void tcp_inherit_port(struct sock *sk, struct sock *child);
-
extern void tcp_v4_err(struct sk_buff *skb, u32);
extern void tcp_shutdown (struct sock *sk, int how);
extern int tcp_v4_remember_stamp(struct sock *sk);
-extern int tcp_v4_tw_remember_stamp(struct tcp_tw_bucket *tw);
+extern int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
extern int tcp_sendmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t size);
extern void tcp_rcv_space_adjust(struct sock *sk);
-enum tcp_ack_state_t
-{
- TCP_ACK_SCHED = 1,
- TCP_ACK_TIMER = 2,
- TCP_ACK_PUSHED= 4
-};
+extern void tcp_cleanup_rbuf(struct sock *sk, int copied);
-static inline void tcp_schedule_ack(struct tcp_sock *tp)
-{
- tp->ack.pending |= TCP_ACK_SCHED;
-}
+extern int tcp_twsk_unique(struct sock *sk,
+ struct sock *sktw, void *twp);
-static inline int tcp_ack_scheduled(struct tcp_sock *tp)
-{
- return tp->ack.pending&TCP_ACK_SCHED;
-}
+extern void tcp_twsk_destructor(struct sock *sk);
-static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp, unsigned int pkts)
+static inline void tcp_dec_quickack_mode(struct sock *sk,
+ const unsigned int pkts)
{
- if (tp->ack.quick) {
- if (pkts >= tp->ack.quick) {
- tp->ack.quick = 0;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ if (icsk->icsk_ack.quick) {
+ if (pkts >= icsk->icsk_ack.quick) {
+ icsk->icsk_ack.quick = 0;
/* Leaving quickack mode we deflate ATO. */
- tp->ack.ato = TCP_ATO_MIN;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
} else
- tp->ack.quick -= pkts;
+ icsk->icsk_ack.quick -= pkts;
}
}
-extern void tcp_enter_quickack_mode(struct tcp_sock *tp);
-
-static __inline__ void tcp_delack_init(struct tcp_sock *tp)
-{
- memset(&tp->ack, 0, sizeof(tp->ack));
-}
+extern void tcp_enter_quickack_mode(struct sock *sk);
static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
{
};
-extern enum tcp_tw_status tcp_timewait_state_process(struct tcp_tw_bucket *tw,
+extern enum tcp_tw_status tcp_timewait_state_process(struct inet_timewait_sock *tw,
struct sk_buff *skb,
- struct tcphdr *th,
- unsigned len);
+ const struct tcphdr *th);
extern struct sock * tcp_check_req(struct sock *sk,struct sk_buff *skb,
struct request_sock *req,
extern void tcp_close(struct sock *sk,
long timeout);
-extern struct sock * tcp_accept(struct sock *sk, int flags, int *err);
extern unsigned int tcp_poll(struct file * file, struct socket *sock, struct poll_table_struct *wait);
extern int tcp_getsockopt(struct sock *sk, int level,
extern int tcp_setsockopt(struct sock *sk, int level,
int optname, char __user *optval,
int optlen);
+extern int compat_tcp_getsockopt(struct sock *sk,
+ int level, int optname,
+ char __user *optval, int __user *optlen);
+extern int compat_tcp_setsockopt(struct sock *sk,
+ int level, int optname,
+ char __user *optval, int optlen);
extern void tcp_set_keepalive(struct sock *sk, int val);
extern int tcp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg,
size_t len, int nonblock,
int flags, int *addr_len);
-extern int tcp_listen_start(struct sock *sk);
-
extern void tcp_parse_options(struct sk_buff *skb,
struct tcp_options_received *opt_rx,
int estab);
* TCP v4 functions exported for the inet6 API
*/
-extern void tcp_v4_send_check(struct sock *sk,
- struct tcphdr *th, int len,
+extern void tcp_v4_send_check(struct sock *sk, int len,
struct sk_buff *skb);
extern int tcp_v4_conn_request(struct sock *sk,
extern void tcp_unhash(struct sock *sk);
-extern int tcp_v4_hash_connecting(struct sock *sk);
-
-
/* From syncookies.c */
extern struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
struct ip_options *opt);
extern void tcp_xmit_retransmit_queue(struct sock *);
extern void tcp_simple_retransmit(struct sock *);
extern int tcp_trim_head(struct sock *, struct sk_buff *, u32);
+extern int tcp_fragment(struct sock *, struct sk_buff *, u32, unsigned int);
extern void tcp_send_probe0(struct sock *);
extern void tcp_send_partial(struct sock *);
extern int tcp_write_wakeup(struct sock *);
extern void tcp_send_fin(struct sock *sk);
-extern void tcp_send_active_reset(struct sock *sk,
- unsigned int __nocast priority);
+extern void tcp_send_active_reset(struct sock *sk, gfp_t priority);
extern int tcp_send_synack(struct sock *);
extern void tcp_push_one(struct sock *, unsigned int mss_now);
extern void tcp_send_ack(struct sock *sk);
/* tcp_timer.c */
extern void tcp_init_xmit_timers(struct sock *);
-extern void tcp_clear_xmit_timers(struct sock *);
+static inline void tcp_clear_xmit_timers(struct sock *sk)
+{
+ inet_csk_clear_xmit_timers(sk);
+}
-extern void tcp_delete_keepalive_timer(struct sock *);
-extern void tcp_reset_keepalive_timer(struct sock *, unsigned long);
extern unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
extern unsigned int tcp_current_mss(struct sock *sk, int large);
-#ifdef TCP_DEBUG
-extern const char tcp_timer_bug_msg[];
-#endif
-
-/* tcp_diag.c */
+/* tcp.c */
extern void tcp_get_info(struct sock *, struct tcp_info *);
/* Read 'sendfile()'-style from a TCP socket */
extern int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
sk_read_actor_t recv_actor);
-static inline void tcp_clear_xmit_timer(struct sock *sk, int what)
-{
- struct tcp_sock *tp = tcp_sk(sk);
-
- switch (what) {
- case TCP_TIME_RETRANS:
- case TCP_TIME_PROBE0:
- tp->pending = 0;
+extern void tcp_initialize_rcv_mss(struct sock *sk);
-#ifdef TCP_CLEAR_TIMERS
- sk_stop_timer(sk, &tp->retransmit_timer);
-#endif
- break;
- case TCP_TIME_DACK:
- tp->ack.blocked = 0;
- tp->ack.pending = 0;
+extern int tcp_mtu_to_mss(struct sock *sk, int pmtu);
+extern int tcp_mss_to_mtu(struct sock *sk, int mss);
+extern void tcp_mtup_init(struct sock *sk);
-#ifdef TCP_CLEAR_TIMERS
- sk_stop_timer(sk, &tp->delack_timer);
-#endif
- break;
- default:
-#ifdef TCP_DEBUG
- printk(tcp_timer_bug_msg);
-#endif
- return;
- };
-
-}
-
-/*
- * Reset the retransmission timer
- */
-static inline void tcp_reset_xmit_timer(struct sock *sk, int what, unsigned long when)
-{
- struct tcp_sock *tp = tcp_sk(sk);
-
- if (when > TCP_RTO_MAX) {
-#ifdef TCP_DEBUG
- printk(KERN_DEBUG "reset_xmit_timer sk=%p %d when=0x%lx, caller=%p\n", sk, what, when, current_text_addr());
-#endif
- when = TCP_RTO_MAX;
- }
-
- switch (what) {
- case TCP_TIME_RETRANS:
- case TCP_TIME_PROBE0:
- tp->pending = what;
- tp->timeout = jiffies+when;
- sk_reset_timer(sk, &tp->retransmit_timer, tp->timeout);
- break;
-
- case TCP_TIME_DACK:
- tp->ack.pending |= TCP_ACK_TIMER;
- tp->ack.timeout = jiffies+when;
- sk_reset_timer(sk, &tp->delack_timer, tp->ack.timeout);
- break;
-
- default:
-#ifdef TCP_DEBUG
- printk(tcp_timer_bug_msg);
-#endif
- return;
- };
-}
-
-/* Initialize RCV_MSS value.
- * RCV_MSS is an our guess about MSS used by the peer.
- * We haven't any direct information about the MSS.
- * It's better to underestimate the RCV_MSS rather than overestimate.
- * Overestimations make us ACKing less frequently than needed.
- * Underestimations are more easy to detect and fix by tcp_measure_rcv_mss().
- */
-
-static inline void tcp_initialize_rcv_mss(struct sock *sk)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache);
-
- hint = min(hint, tp->rcv_wnd/2);
- hint = min(hint, TCP_MIN_RCVMSS);
- hint = max(hint, TCP_MIN_MSS);
-
- tp->ack.rcv_mss = hint;
-}
-
-static __inline__ void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd)
+static inline void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd)
{
tp->pred_flags = htonl((tp->tcp_header_len << 26) |
ntohl(TCP_FLAG_ACK) |
snd_wnd);
}
-static __inline__ void tcp_fast_path_on(struct tcp_sock *tp)
+static inline void tcp_fast_path_on(struct tcp_sock *tp)
{
__tcp_fast_path_on(tp, tp->snd_wnd >> tp->rx_opt.snd_wscale);
}
* Rcv_nxt can be after the window if our peer push more data
* than the offered window.
*/
-static __inline__ u32 tcp_receive_window(const struct tcp_sock *tp)
+static inline u32 tcp_receive_window(const struct tcp_sock *tp)
{
s32 win = tp->rcv_wup + tp->rcv_wnd - tp->rcv_nxt;
/* TCP timestamps are only 32-bits, this causes a slight
* complication on 64-bit systems since we store a snapshot
- * of jiffies in the buffer control blocks below. We decidely
- * only use of the low 32-bits of jiffies and hide the ugly
+ * of jiffies in the buffer control blocks below. We decided
+ * to use only the low 32-bits of jiffies and hide the ugly
* casts with the following macro.
*/
#define tcp_time_stamp ((__u32)(jiffies))
-/* This is what the send packet queueing engine uses to pass
+/* This is what the send packet queuing engine uses to pass
* TCP per-packet control information to the transmission
* code. We also store the host-order sequence numbers in
* here too. This is 36 bytes on 32-bit architectures,
#define TCPCB_EVER_RETRANS 0x80 /* Ever retransmitted frame */
#define TCPCB_RETRANS (TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
-#define TCPCB_URG 0x20 /* Urgent pointer advenced here */
+#define TCPCB_URG 0x20 /* Urgent pointer advanced here */
#define TCPCB_AT_TAIL (TCPCB_URG)
*/
static inline int tcp_skb_pcount(const struct sk_buff *skb)
{
- return skb_shinfo(skb)->tso_segs;
+ return skb_shinfo(skb)->gso_segs;
}
/* This is valid iff tcp_skb_pcount() > 1. */
static inline int tcp_skb_mss(const struct sk_buff *skb)
{
- return skb_shinfo(skb)->tso_size;
+ return skb_shinfo(skb)->gso_size;
}
static inline void tcp_dec_pcount_approx(__u32 *count,
tp->packets_out += tcp_skb_pcount(skb);
if (!orig)
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ inet_csk(sk)->icsk_rto, TCP_RTO_MAX);
}
static inline void tcp_packets_out_dec(struct tcp_sock *tp,
* Interface for adding new TCP congestion control handlers
*/
#define TCP_CA_NAME_MAX 16
+#define TCP_CA_MAX 128
+#define TCP_CA_BUF_MAX (TCP_CA_NAME_MAX*TCP_CA_MAX)
+
struct tcp_congestion_ops {
struct list_head list;
+ int non_restricted;
/* initialize private data (optional) */
- void (*init)(struct tcp_sock *tp);
+ void (*init)(struct sock *sk);
/* cleanup private data (optional) */
- void (*release)(struct tcp_sock *tp);
+ void (*release)(struct sock *sk);
/* return slow start threshold (required) */
- u32 (*ssthresh)(struct tcp_sock *tp);
+ u32 (*ssthresh)(struct sock *sk);
/* lower bound for congestion window (optional) */
- u32 (*min_cwnd)(struct tcp_sock *tp);
+ u32 (*min_cwnd)(const struct sock *sk);
/* do new cwnd calculation (required) */
- void (*cong_avoid)(struct tcp_sock *tp, u32 ack,
+ void (*cong_avoid)(struct sock *sk, u32 ack,
u32 rtt, u32 in_flight, int good_ack);
/* round trip time sample per acked packet (optional) */
- void (*rtt_sample)(struct tcp_sock *tp, u32 usrtt);
+ void (*rtt_sample)(struct sock *sk, u32 usrtt);
/* call before changing ca_state (optional) */
- void (*set_state)(struct tcp_sock *tp, u8 new_state);
+ void (*set_state)(struct sock *sk, u8 new_state);
/* call when cwnd event occurs (optional) */
- void (*cwnd_event)(struct tcp_sock *tp, enum tcp_ca_event ev);
+ void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev);
/* new value of cwnd after loss (optional) */
- u32 (*undo_cwnd)(struct tcp_sock *tp);
+ u32 (*undo_cwnd)(struct sock *sk);
/* hook for packet ack accounting (optional) */
- void (*pkts_acked)(struct tcp_sock *tp, u32 num_acked);
- /* get info for tcp_diag (optional) */
- void (*get_info)(struct tcp_sock *tp, u32 ext, struct sk_buff *skb);
+ void (*pkts_acked)(struct sock *sk, u32 num_acked);
+ /* get info for inet_diag (optional) */
+ void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);
char name[TCP_CA_NAME_MAX];
struct module *owner;
extern int tcp_register_congestion_control(struct tcp_congestion_ops *type);
extern void tcp_unregister_congestion_control(struct tcp_congestion_ops *type);
-extern void tcp_init_congestion_control(struct tcp_sock *tp);
-extern void tcp_cleanup_congestion_control(struct tcp_sock *tp);
+extern void tcp_init_congestion_control(struct sock *sk);
+extern void tcp_cleanup_congestion_control(struct sock *sk);
extern int tcp_set_default_congestion_control(const char *name);
extern void tcp_get_default_congestion_control(char *name);
-extern int tcp_set_congestion_control(struct tcp_sock *tp, const char *name);
+extern void tcp_get_available_congestion_control(char *buf, size_t len);
+extern void tcp_get_allowed_congestion_control(char *buf, size_t len);
+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 struct tcp_congestion_ops tcp_init_congestion_ops;
-extern u32 tcp_reno_ssthresh(struct tcp_sock *tp);
-extern void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack,
+extern u32 tcp_reno_ssthresh(struct sock *sk);
+extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack,
u32 rtt, u32 in_flight, int flag);
-extern u32 tcp_reno_min_cwnd(struct tcp_sock *tp);
+extern u32 tcp_reno_min_cwnd(const struct sock *sk);
extern struct tcp_congestion_ops tcp_reno;
-static inline void tcp_set_ca_state(struct tcp_sock *tp, u8 ca_state)
+static inline void tcp_set_ca_state(struct sock *sk, const u8 ca_state)
{
- if (tp->ca_ops->set_state)
- tp->ca_ops->set_state(tp, ca_state);
- tp->ca_state = ca_state;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (icsk->icsk_ca_ops->set_state)
+ icsk->icsk_ca_ops->set_state(sk, ca_state);
+ icsk->icsk_ca_state = ca_state;
}
-static inline void tcp_ca_event(struct tcp_sock *tp, enum tcp_ca_event event)
+static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
{
- if (tp->ca_ops->cwnd_event)
- tp->ca_ops->cwnd_event(tp, event);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (icsk->icsk_ca_ops->cwnd_event)
+ icsk->icsk_ca_ops->cwnd_event(sk, event);
}
/* This determines how many packets are "in the network" to the best
* "Packets left network, but not honestly ACKed yet" PLUS
* "Packets fast retransmitted"
*/
-static __inline__ unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
+static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
{
return (tp->packets_out - tp->left_out + tp->retrans_out);
}
* The exception is rate halving phase, when cwnd is decreasing towards
* ssthresh.
*/
-static inline __u32 tcp_current_ssthresh(struct tcp_sock *tp)
+static inline __u32 tcp_current_ssthresh(const struct sock *sk)
{
- if ((1<<tp->ca_state)&(TCPF_CA_CWR|TCPF_CA_Recovery))
+ const struct tcp_sock *tp = tcp_sk(sk);
+ if ((1 << inet_csk(sk)->icsk_ca_state) & (TCPF_CA_CWR | TCPF_CA_Recovery))
return tp->snd_ssthresh;
else
return max(tp->snd_ssthresh,
tp->left_out = tp->sacked_out + tp->lost_out;
}
-/* Set slow start threshold and cwnd not falling to slow start */
-static inline void __tcp_enter_cwr(struct tcp_sock *tp)
-{
- tp->undo_marker = 0;
- tp->snd_ssthresh = tp->ca_ops->ssthresh(tp);
- tp->snd_cwnd = min(tp->snd_cwnd,
- tcp_packets_in_flight(tp) + 1U);
- tp->snd_cwnd_cnt = 0;
- tp->high_seq = tp->snd_nxt;
- tp->snd_cwnd_stamp = tcp_time_stamp;
- TCP_ECN_queue_cwr(tp);
-}
-
-static inline void tcp_enter_cwr(struct tcp_sock *tp)
-{
- tp->prior_ssthresh = 0;
- if (tp->ca_state < TCP_CA_CWR) {
- __tcp_enter_cwr(tp);
- tcp_set_ca_state(tp, TCP_CA_CWR);
- }
-}
-
+extern void tcp_enter_cwr(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
return 3;
}
-static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss,
- const struct sk_buff *skb)
+/* 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);
+}
+
+static inline void tcp_minshall_update(struct tcp_sock *tp, int mss,
+ const struct sk_buff *skb)
{
if (skb->len < mss)
tp->snd_sml = TCP_SKB_CB(skb)->end_seq;
}
-static __inline__ void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *tp)
+static inline void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *tp)
{
- if (!tp->packets_out && !tp->pending)
- tcp_reset_xmit_timer(sk, TCP_TIME_PROBE0, tp->rto);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ if (!tp->packets_out && !icsk->icsk_pending)
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
+ icsk->icsk_rto, TCP_RTO_MAX);
}
-static __inline__ void tcp_push_pending_frames(struct sock *sk,
- struct tcp_sock *tp)
+static inline void tcp_push_pending_frames(struct sock *sk,
+ struct tcp_sock *tp)
{
__tcp_push_pending_frames(sk, tp, tcp_current_mss(sk, 1), 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 ack, 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 ack, u32 seq)
{
tp->snd_wl1 = seq;
}
-extern void tcp_destroy_sock(struct sock *sk);
-
-
/*
* Calculate(/check) TCP checksum
*/
-static __inline__ u16 tcp_v4_check(struct tcphdr *th, int len,
- unsigned long saddr, unsigned long daddr,
- unsigned long base)
+static inline u16 tcp_v4_check(struct tcphdr *th, int len,
+ unsigned long saddr, unsigned long daddr,
+ unsigned long base)
{
return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base);
}
-static __inline__ int __tcp_checksum_complete(struct sk_buff *skb)
+static inline int __tcp_checksum_complete(struct sk_buff *skb)
{
- return (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len, skb->csum));
+ return __skb_checksum_complete(skb);
}
-static __inline__ int tcp_checksum_complete(struct sk_buff *skb)
+static inline int tcp_checksum_complete(struct sk_buff *skb)
{
return skb->ip_summed != CHECKSUM_UNNECESSARY &&
__tcp_checksum_complete(skb);
/* Prequeue for VJ style copy to user, combined with checksumming. */
-static __inline__ void tcp_prequeue_init(struct tcp_sock *tp)
+static inline void tcp_prequeue_init(struct tcp_sock *tp)
{
tp->ucopy.task = NULL;
tp->ucopy.len = 0;
tp->ucopy.memory = 0;
skb_queue_head_init(&tp->ucopy.prequeue);
+#ifdef CONFIG_NET_DMA
+ tp->ucopy.dma_chan = NULL;
+ tp->ucopy.wakeup = 0;
+ tp->ucopy.pinned_list = NULL;
+ tp->ucopy.dma_cookie = 0;
+#endif
}
/* Packet is added to VJ-style prequeue for processing in process
*
* NOTE: is this not too big to inline?
*/
-static __inline__ int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
+static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
tp->ucopy.memory = 0;
} else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
wake_up_interruptible(sk->sk_sleep);
- if (!tcp_ack_scheduled(tp))
- tcp_reset_xmit_timer(sk, TCP_TIME_DACK, (3*TCP_RTO_MIN)/4);
+ if (!inet_csk_ack_scheduled(sk))
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ (3 * TCP_RTO_MIN) / 4,
+ TCP_RTO_MAX);
}
return 1;
}
};
#endif
-static __inline__ void tcp_set_state(struct sock *sk, int state)
+static inline void tcp_set_state(struct sock *sk, int state)
{
int oldstate = sk->sk_state;
TCP_INC_STATS(TCP_MIB_ESTABRESETS);
sk->sk_prot->unhash(sk);
- if (tcp_sk(sk)->bind_hash &&
+ if (inet_csk(sk)->icsk_bind_hash &&
!(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
- tcp_put_port(sk);
+ inet_put_port(&tcp_hashinfo, sk);
/* fall through */
default:
if (oldstate==TCP_ESTABLISHED)
#endif
}
-static __inline__ void tcp_done(struct sock *sk)
+static inline void tcp_done(struct sock *sk)
{
+ if(sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
+ TCP_INC_STATS_BH(TCP_MIB_ATTEMPTFAILS);
+
tcp_set_state(sk, TCP_CLOSE);
tcp_clear_xmit_timers(sk);
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_state_change(sk);
else
- tcp_destroy_sock(sk);
+ inet_csk_destroy_sock(sk);
}
-static __inline__ void tcp_sack_reset(struct tcp_options_received *rx_opt)
+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;
}
-static __inline__ void tcp_build_and_update_options(__u32 *ptr, struct tcp_sock *tp, __u32 tstamp)
-{
- if (tp->rx_opt.tstamp_ok) {
- *ptr++ = __constant_htonl((TCPOPT_NOP << 24) |
- (TCPOPT_NOP << 16) |
- (TCPOPT_TIMESTAMP << 8) |
- TCPOLEN_TIMESTAMP);
- *ptr++ = htonl(tstamp);
- *ptr++ = htonl(tp->rx_opt.ts_recent);
- }
- if (tp->rx_opt.eff_sacks) {
- struct tcp_sack_block *sp = tp->rx_opt.dsack ? tp->duplicate_sack : tp->selective_acks;
- int this_sack;
-
- *ptr++ = __constant_htonl((TCPOPT_NOP << 24) |
- (TCPOPT_NOP << 16) |
- (TCPOPT_SACK << 8) |
- (TCPOLEN_SACK_BASE +
- (tp->rx_opt.eff_sacks * TCPOLEN_SACK_PERBLOCK)));
- for(this_sack = 0; this_sack < tp->rx_opt.eff_sacks; this_sack++) {
- *ptr++ = htonl(sp[this_sack].start_seq);
- *ptr++ = htonl(sp[this_sack].end_seq);
- }
- if (tp->rx_opt.dsack) {
- tp->rx_opt.dsack = 0;
- tp->rx_opt.eff_sacks--;
- }
- }
-}
-
-/* Construct a tcp options header for a SYN or SYN_ACK packet.
- * If this is every changed make sure to change the definition of
- * MAX_SYN_SIZE to match the new maximum number of options that you
- * can generate.
- */
-static inline void tcp_syn_build_options(__u32 *ptr, int mss, int ts, int sack,
- int offer_wscale, int wscale, __u32 tstamp, __u32 ts_recent)
-{
- /* We always get an MSS option.
- * The option bytes which will be seen in normal data
- * packets should timestamps be used, must be in the MSS
- * advertised. But we subtract them from tp->mss_cache so
- * that calculations in tcp_sendmsg are simpler etc.
- * So account for this fact here if necessary. If we
- * don't do this correctly, as a receiver we won't
- * recognize data packets as being full sized when we
- * should, and thus we won't abide by the delayed ACK
- * rules correctly.
- * SACKs don't matter, we never delay an ACK when we
- * have any of those going out.
- */
- *ptr++ = htonl((TCPOPT_MSS << 24) | (TCPOLEN_MSS << 16) | mss);
- if (ts) {
- if(sack)
- *ptr++ = __constant_htonl((TCPOPT_SACK_PERM << 24) | (TCPOLEN_SACK_PERM << 16) |
- (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
- else
- *ptr++ = __constant_htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
- (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
- *ptr++ = htonl(tstamp); /* TSVAL */
- *ptr++ = htonl(ts_recent); /* TSECR */
- } else if(sack)
- *ptr++ = __constant_htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
- (TCPOPT_SACK_PERM << 8) | TCPOLEN_SACK_PERM);
- if (offer_wscale)
- *ptr++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_WINDOW << 16) | (TCPOLEN_WINDOW << 8) | (wscale));
-}
-
/* Determine a window scaling and initial window to offer. */
extern void tcp_select_initial_window(int __space, __u32 mss,
__u32 *rcv_wnd, __u32 *window_clamp,
return tcp_win_from_space(sk->sk_rcvbuf);
}
-static inline void tcp_acceptq_queue(struct sock *sk, struct request_sock *req,
- struct sock *child)
-{
- reqsk_queue_add(&tcp_sk(sk)->accept_queue, req, sk, child);
-}
-
-static inline void
-tcp_synq_removed(struct sock *sk, struct request_sock *req)
-{
- if (reqsk_queue_removed(&tcp_sk(sk)->accept_queue, req) == 0)
- tcp_delete_keepalive_timer(sk);
-}
-
-static inline void tcp_synq_added(struct sock *sk)
-{
- if (reqsk_queue_added(&tcp_sk(sk)->accept_queue) == 0)
- tcp_reset_keepalive_timer(sk, TCP_TIMEOUT_INIT);
-}
-
-static inline int tcp_synq_len(struct sock *sk)
-{
- return reqsk_queue_len(&tcp_sk(sk)->accept_queue);
-}
-
-static inline int tcp_synq_young(struct sock *sk)
-{
- return reqsk_queue_len_young(&tcp_sk(sk)->accept_queue);
-}
-
-static inline int tcp_synq_is_full(struct sock *sk)
-{
- return reqsk_queue_is_full(&tcp_sk(sk)->accept_queue);
-}
-
-static inline void tcp_synq_unlink(struct tcp_sock *tp, struct request_sock *req,
- struct request_sock **prev)
-{
- reqsk_queue_unlink(&tp->accept_queue, req, prev);
-}
-
-static inline void tcp_synq_drop(struct sock *sk, struct request_sock *req,
- struct request_sock **prev)
-{
- tcp_synq_unlink(tcp_sk(sk), req, prev);
- tcp_synq_removed(sk, req);
- reqsk_free(req);
-}
-
-static __inline__ void tcp_openreq_init(struct request_sock *req,
- struct tcp_options_received *rx_opt,
- struct sk_buff *skb)
+static inline void tcp_openreq_init(struct request_sock *req,
+ struct tcp_options_received *rx_opt,
+ struct sk_buff *skb)
{
struct inet_request_sock *ireq = inet_rsk(req);
extern void tcp_enter_memory_pressure(void);
-extern void tcp_listen_wlock(void);
-
-/* - We may sleep inside this lock.
- * - If sleeping is not required (or called from BH),
- * use plain read_(un)lock(&tcp_lhash_lock).
- */
-
-static inline void tcp_listen_lock(void)
-{
- /* read_lock synchronizes to candidates to writers */
- read_lock(&tcp_lhash_lock);
- atomic_inc(&tcp_lhash_users);
- read_unlock(&tcp_lhash_lock);
-}
-
-static inline void tcp_listen_unlock(void)
-{
- if (atomic_dec_and_test(&tcp_lhash_users))
- wake_up(&tcp_lhash_wait);
-}
-
static inline int keepalive_intvl_when(const struct tcp_sock *tp)
{
return tp->keepalive_intvl ? : sysctl_tcp_keepalive_intvl;
return tp->keepalive_time ? : sysctl_tcp_keepalive_time;
}
-static inline int tcp_fin_time(const struct tcp_sock *tp)
+static inline int tcp_fin_time(const struct sock *sk)
{
- int fin_timeout = tp->linger2 ? : sysctl_tcp_fin_timeout;
+ int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
+ const int rto = inet_csk(sk)->icsk_rto;
- if (fin_timeout < (tp->rto<<2) - (tp->rto>>1))
- fin_timeout = (tp->rto<<2) - (tp->rto>>1);
+ if (fin_timeout < (rto << 2) - (rto >> 1))
+ fin_timeout = (rto << 2) - (rto >> 1);
return fin_timeout;
}
TCP_ADD_STATS_USER(TCP_MIB_MAXCONN, -1);
}
+/*from STCP */
+static inline void clear_all_retrans_hints(struct tcp_sock *tp){
+ tp->lost_skb_hint = NULL;
+ tp->scoreboard_skb_hint = NULL;
+ tp->retransmit_skb_hint = NULL;
+ tp->forward_skb_hint = NULL;
+ tp->fastpath_skb_hint = NULL;
+}
+
+/* MD5 Signature */
+struct crypto_hash;
+
+/* - key database */
+struct tcp_md5sig_key {
+ u8 *key;
+ u8 keylen;
+};
+
+struct tcp4_md5sig_key {
+ u8 *key;
+ u16 keylen;
+ __be32 addr;
+};
+
+struct tcp6_md5sig_key {
+ u8 *key;
+ u16 keylen;
+#if 0
+ u32 scope_id; /* XXX */
+#endif
+ struct in6_addr addr;
+};
+
+/* - sock block */
+struct tcp_md5sig_info {
+ struct tcp4_md5sig_key *keys4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct tcp6_md5sig_key *keys6;
+ u32 entries6;
+ u32 alloced6;
+#endif
+ u32 entries4;
+ u32 alloced4;
+};
+
+/* - pseudo header */
+struct tcp4_pseudohdr {
+ __be32 saddr;
+ __be32 daddr;
+ __u8 pad;
+ __u8 protocol;
+ __be16 len;
+};
+
+struct tcp6_pseudohdr {
+ struct in6_addr saddr;
+ struct in6_addr daddr;
+ __be32 len;
+ __be32 protocol; /* including padding */
+};
+
+union tcp_md5sum_block {
+ struct tcp4_pseudohdr ip4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct tcp6_pseudohdr ip6;
+#endif
+};
+
+/* - pool: digest algorithm, hash description and scratch buffer */
+struct tcp_md5sig_pool {
+ struct hash_desc md5_desc;
+ union tcp_md5sum_block md5_blk;
+};
+
+#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, int tcplen);
+extern struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk,
+ struct sock *addr_sk);
+
+extern int tcp_v4_md5_do_add(struct sock *sk,
+ __be32 addr,
+ u8 *newkey,
+ u8 newkeylen);
+
+extern int tcp_v4_md5_do_del(struct sock *sk,
+ u32 addr);
+
+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);
+
+static inline
+struct tcp_md5sig_pool *tcp_get_md5sig_pool(void)
+{
+ int cpu = get_cpu();
+ struct tcp_md5sig_pool *ret = __tcp_get_md5sig_pool(cpu);
+ if (!ret)
+ put_cpu();
+ return ret;
+}
+
+static inline void tcp_put_md5sig_pool(void)
+{
+ __tcp_put_md5sig_pool();
+ put_cpu();
+}
+
/* /proc */
enum tcp_seq_states {
TCP_SEQ_STATE_LISTENING,
extern int tcp_proc_register(struct tcp_seq_afinfo *afinfo);
extern void tcp_proc_unregister(struct tcp_seq_afinfo *afinfo);
+extern struct request_sock_ops tcp_request_sock_ops;
+
+extern int 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);
+
+#ifdef CONFIG_PROC_FS
+extern int tcp4_proc_init(void);
+extern void tcp4_proc_exit(void);
+#endif
+
+/* TCP af-specific functions */
+struct tcp_sock_af_ops {
+#ifdef CONFIG_TCP_MD5SIG
+ struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk,
+ struct sock *addr_sk);
+ 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, int len);
+ int (*md5_add) (struct sock *sk,
+ struct sock *addr_sk,
+ u8 *newkey,
+ u8 len);
+ int (*md5_parse) (struct sock *sk,
+ char __user *optval,
+ int optlen);
+#endif
+};
+
+struct tcp_request_sock_ops {
+#ifdef CONFIG_TCP_MD5SIG
+ struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk,
+ struct request_sock *req);
+#endif
+};
+
+extern void tcp_v4_init(struct net_proto_family *ops);
+extern void tcp_init(void);
+
#endif /* _TCP_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff