diff options
Diffstat (limited to 'sys/netinet/tcp_var.h')
| -rw-r--r-- | sys/netinet/tcp_var.h | 82 |
1 files changed, 75 insertions, 7 deletions
diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index 7dc1bac..0f71278 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -36,9 +36,14 @@ #ifndef _NETINET_TCP_VAR_H_ #define _NETINET_TCP_VAR_H_ + +#include <netinet/in_pcb.h> /* needed for in_conninfo, inp_gen_t */ + /* * Kernel variables for tcp. */ +extern int tcp_do_rfc1323; +extern int tcp_do_rfc1644; /* TCP segment queue entry */ struct tseg_qent { @@ -171,17 +176,56 @@ struct tcpcb { * to tcp_dooptions. */ struct tcpopt { - u_long to_flag; /* which options are present */ + u_long to_flags; /* which options are present */ #define TOF_TS 0x0001 /* timestamp */ #define TOF_CC 0x0002 /* CC and CCnew are exclusive */ #define TOF_CCNEW 0x0004 #define TOF_CCECHO 0x0008 - u_long to_tsval; - u_long to_tsecr; - tcp_cc to_cc; /* holds CC or CCnew */ - tcp_cc to_ccecho; +#define TOF_MSS 0x0010 +#define TOF_SCALE 0x0020 + u_int32_t to_tsval; + u_int32_t to_tsecr; + tcp_cc to_cc; /* holds CC or CCnew */ + tcp_cc to_ccecho; + u_int16_t to_mss; + u_int8_t to_requested_s_scale; + u_int8_t to_pad; +}; + +struct syncache { + inp_gen_t sc_inp_gencnt; /* pointer check */ + struct tcpcb *sc_tp; /* tcb for listening socket */ + struct mbuf *sc_ipopts; /* source route */ + struct in_conninfo sc_inc; /* addresses */ +#define sc_route sc_inc.inc_route +#define sc_route6 sc_inc.inc6_route + u_int32_t sc_tsrecent; + tcp_cc sc_cc_send; /* holds CC or CCnew */ + tcp_cc sc_cc_recv; + tcp_seq sc_irs; /* seq from peer */ + tcp_seq sc_iss; /* our ISS */ + u_long sc_rxttime; /* retransmit time */ + u_int16_t sc_rxtslot; /* retransmit counter */ + u_int16_t sc_peer_mss; /* peer's MSS */ + u_int16_t sc_wnd; /* advertised window */ + u_int8_t sc_requested_s_scale:4, + sc_request_r_scale:4; + u_int8_t sc_flags; +#define SCF_NOOPT 0x01 /* no TCP options */ +#define SCF_WINSCALE 0x02 /* negotiated window scaling */ +#define SCF_TIMESTAMP 0x04 /* negotiated timestamps */ +#define SCF_CC 0x08 /* negotiated CC */ +#define SCF_UNREACH 0x10 /* icmp unreachable received */ +#define SCF_KEEPROUTE 0x20 /* keep cloned route */ + TAILQ_ENTRY(syncache) sc_hash; + TAILQ_ENTRY(syncache) sc_timerq; }; +struct syncache_head { + TAILQ_HEAD(, syncache) sch_bucket; + u_int sch_length; +}; + /* * The TAO cache entry which is stored in the protocol family specific * portion of the route metrics. @@ -306,6 +350,22 @@ struct tcpstat { u_long tcps_badsyn; /* bogus SYN, e.g. premature ACK */ u_long tcps_mturesent; /* resends due to MTU discovery */ u_long tcps_listendrop; /* listen queue overflows */ + + u_long tcps_sc_added; /* entry added to syncache */ + u_long tcps_sc_retransmitted; /* syncache entry was retransmitted */ + u_long tcps_sc_dupsyn; /* duplicate SYN packet */ + u_long tcps_sc_dropped; /* could not reply to packet */ + u_long tcps_sc_completed; /* successful extraction of entry */ + u_long tcps_sc_bucketoverflow; /* syncache per-bucket limit hit */ + u_long tcps_sc_cacheoverflow; /* syncache cache limit hit */ + u_long tcps_sc_reset; /* RST removed entry from syncache */ + u_long tcps_sc_stale; /* timed out or listen socket gone */ + u_long tcps_sc_aborted; /* syncache entry aborted */ + u_long tcps_sc_badack; /* removed due to bad ACK */ + u_long tcps_sc_unreach; /* ICMP unreachable received */ + u_long tcps_sc_zonefail; /* zalloc() failed */ + u_long tcps_sc_sendcookie; /* SYN cookie sent */ + u_long tcps_sc_recvcookie; /* SYN cookie received */ }; /* @@ -383,7 +443,7 @@ struct tcpcb * void tcp_drain __P((void)); void tcp_fasttimo __P((void)); struct rmxp_tao * - tcp_gettaocache __P((struct inpcb *)); + tcp_gettaocache __P((struct in_conninfo *)); void tcp_init __P((void)); void tcp_input __P((struct mbuf *, int)); void tcp_mss __P((struct tcpcb *, int)); @@ -397,7 +457,7 @@ void tcp_quench __P((struct inpcb *, int)); void tcp_respond __P((struct tcpcb *, void *, struct tcphdr *, struct mbuf *, tcp_seq, tcp_seq, int)); struct rtentry * - tcp_rtlookup __P((struct inpcb *)); + tcp_rtlookup __P((struct in_conninfo *)); void tcp_setpersist __P((struct tcpcb *)); void tcp_slowtimo __P((void)); struct tcptemp * @@ -407,6 +467,14 @@ struct tcpcb * tcp_timers __P((struct tcpcb *, int)); void tcp_trace __P((int, int, struct tcpcb *, void *, struct tcphdr *, int)); +void syncache_init(void); +void syncache_unreach(struct in_conninfo *, struct tcphdr *); +int syncache_expand(struct in_conninfo *, struct tcphdr *, + struct socket **, struct mbuf *); +int syncache_add(struct in_conninfo *, struct tcpopt *, + struct tcphdr *, struct socket **, struct mbuf *); +void syncache_chkrst(struct in_conninfo *, struct tcphdr *); +void syncache_badack(struct in_conninfo *); extern struct pr_usrreqs tcp_usrreqs; extern u_long tcp_sendspace; |
