+/*
+ * Jaguar compatible TCP control block, for xtcpcb
+ * Does not have the old fields
+ */
+struct otcpcb {
+#else
+struct tseg_qent;
+LIST_HEAD(tsegqe_head, tseg_qent);
+
+struct tcpcb {
+#endif /* KERNEL_PRIVATE */
+ struct tsegqe_head t_segq;
+ int t_dupacks; /* consecutive dup acks recd */
+ struct tcptemp *unused; /* unused now: was t_template */
+
+ int t_timer[TCPT_NTIMERS]; /* tcp timers */
+
+ struct inpcb *t_inpcb; /* back pointer to internet pcb */
+ int t_state; /* state of this connection */
+ u_int t_flags;
+#define TF_ACKNOW 0x00001 /* ack peer immediately */
+#define TF_DELACK 0x00002 /* ack, but try to delay it */
+#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */
+#define TF_NOOPT 0x00008 /* don't use tcp options */
+#define TF_SENTFIN 0x00010 /* have sent FIN */
+#define TF_REQ_SCALE 0x00020 /* have/will request window scaling */
+#define TF_RCVD_SCALE 0x00040 /* other side has requested scaling */
+#define TF_REQ_TSTMP 0x00080 /* have/will request timestamps */
+#define TF_RCVD_TSTMP 0x00100 /* a timestamp was received in SYN */
+#define TF_SACK_PERMIT 0x00200 /* other side said I could SACK */
+#define TF_NEEDSYN 0x00400 /* send SYN (implicit state) */
+#define TF_NEEDFIN 0x00800 /* send FIN (implicit state) */
+#define TF_NOPUSH 0x01000 /* don't push */
+#define TF_REQ_CC 0x02000 /* have/will request CC */
+#define TF_RCVD_CC 0x04000 /* a CC was received in SYN */
+#define TF_SENDCCNEW 0x08000 /* send CCnew instead of CC in SYN */
+#define TF_MORETOCOME 0x10000 /* More data to be appended to sock */
+#define TF_LQ_OVERFLOW 0x20000 /* listen queue overflow */
+#define TF_RXWIN0SENT 0x40000 /* sent a receiver win 0 in response */
+#define TF_SLOWLINK 0x80000 /* route is a on a modem speed link */
+
+ int t_force; /* 1 if forcing out a byte */
+
+ tcp_seq snd_una; /* send unacknowledged */
+ tcp_seq snd_max; /* highest sequence number sent;
+ * used to recognize retransmits
+ */
+ tcp_seq snd_nxt; /* send next */
+ tcp_seq snd_up; /* send urgent pointer */
+
+ tcp_seq snd_wl1; /* window update seg seq number */
+ tcp_seq snd_wl2; /* window update seg ack number */
+ tcp_seq iss; /* initial send sequence number */
+ tcp_seq irs; /* initial receive sequence number */
+
+ tcp_seq rcv_nxt; /* receive next */
+ tcp_seq rcv_adv; /* advertised window */
+ u_long rcv_wnd; /* receive window */
+ tcp_seq rcv_up; /* receive urgent pointer */
+
+ u_long snd_wnd; /* send window */
+ u_long snd_cwnd; /* congestion-controlled window */
+ u_long snd_ssthresh; /* snd_cwnd size threshold for
+ * for slow start exponential to
+ * linear switch
+ */
+ u_int t_maxopd; /* mss plus options */
+
+ u_long t_rcvtime; /* inactivity time */
+ u_long t_starttime; /* time connection was established */
+ int t_rtttime; /* round trip time */
+ tcp_seq t_rtseq; /* sequence number being timed */
+
+ int t_rxtcur; /* current retransmit value (ticks) */
+ u_int t_maxseg; /* maximum segment size */
+ int t_srtt; /* smoothed round-trip time */
+ int t_rttvar; /* variance in round-trip time */
+
+ int t_rxtshift; /* log(2) of rexmt exp. backoff */
+ u_int t_rttmin; /* minimum rtt allowed */
+ u_long t_rttupdated; /* number of times rtt sampled */
+ u_long max_sndwnd; /* largest window peer has offered */
+
+ int t_softerror; /* possible error not yet reported */
+/* out-of-band data */
+ char t_oobflags; /* have some */
+ char t_iobc; /* input character */
+#define TCPOOB_HAVEDATA 0x01
+#define TCPOOB_HADDATA 0x02
+/* RFC 1323 variables */
+ u_char snd_scale; /* window scaling for send window */
+ u_char rcv_scale; /* window scaling for recv window */
+ u_char request_r_scale; /* pending window scaling */
+ u_char requested_s_scale;
+ u_long ts_recent; /* timestamp echo data */
+
+ u_long ts_recent_age; /* when last updated */
+ tcp_seq last_ack_sent;
+/* RFC 1644 variables */
+ tcp_cc cc_send; /* send connection count */
+ tcp_cc cc_recv; /* receive connection count */
+ tcp_seq snd_recover; /* for use in fast recovery */
+/* experimental */
+ u_long snd_cwnd_prev; /* cwnd prior to retransmit */
+ u_long snd_ssthresh_prev; /* ssthresh prior to retransmit */
+ u_long t_badrxtwin; /* window for retransmit recovery */
+};
+
projects / apple / xnu.git / blobdiff