+
+#define intotcpcb(ip) ((struct tcpcb *)(ip)->inp_ppcb)
+#define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
+
+/*
+ * TCP statistics.
+ * Many of these should be kept per connection,
+ * but that's inconvenient at the moment.
+ */
+struct tcpstat {
+#ifdef OLDSTAT
+ /*
+ * Declare statistics the same as in 4.3
+ * at the start of tcpstat (same size and
+ * position) for netstat.
+ */
+ int tcps_rcvbadsum;
+ int tcps_rcvbadoff;
+ int tcps_rcvshort;
+ int tcps_badsegs;
+ int tcps_unack;
+#define tcps_badsum tcps_rcvbadsum
+#define tcps_badoff tcps_rcvbadoff
+#define tcps_hdrops tcps_rcvshort
+
+#endif OLDSTAT
+#ifdef OLDSTAT
+ /*
+ * Declare statistics the same as in 4.3
+ * at the start of tcpstat (same size and
+ * position) for netstat.
+ */
+ int tcps_rcvbadsum;
+ int tcps_rcvbadoff;
+ int tcps_rcvshort;
+ int tcps_badsegs;
+ int tcps_unack;
+#define tcps_badsum tcps_rcvbadsum
+#define tcps_badoff tcps_rcvbadoff
+#define tcps_hdrops tcps_rcvshort
+
+#endif OLDSTAT
+ u_long tcps_connattempt; /* connections initiated */
+ u_long tcps_accepts; /* connections accepted */
+ u_long tcps_connects; /* connections established */
+ u_long tcps_drops; /* connections dropped */
+ u_long tcps_conndrops; /* embryonic connections dropped */
+ u_long tcps_closed; /* conn. closed (includes drops) */
+ u_long tcps_segstimed; /* segs where we tried to get rtt */
+ u_long tcps_rttupdated; /* times we succeeded */
+ u_long tcps_delack; /* delayed acks sent */
+ u_long tcps_timeoutdrop; /* conn. dropped in rxmt timeout */
+ u_long tcps_rexmttimeo; /* retransmit timeouts */
+ u_long tcps_persisttimeo; /* persist timeouts */
+ u_long tcps_keeptimeo; /* keepalive timeouts */
+ u_long tcps_keepprobe; /* keepalive probes sent */
+ u_long tcps_keepdrops; /* connections dropped in keepalive */
+
+ u_long tcps_sndtotal; /* total packets sent */
+ u_long tcps_sndpack; /* data packets sent */
+ u_long tcps_sndbyte; /* data bytes sent */
+ u_long tcps_sndrexmitpack; /* data packets retransmitted */
+ u_long tcps_sndrexmitbyte; /* data bytes retransmitted */
+ u_long tcps_sndacks; /* ack-only packets sent */
+ u_long tcps_sndprobe; /* window probes sent */
+ u_long tcps_sndurg; /* packets sent with URG only */
+ u_long tcps_sndwinup; /* window update-only packets sent */
+ u_long tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */
+
+ u_long tcps_rcvtotal; /* total packets received */
+ u_long tcps_rcvpack; /* packets received in sequence */
+ u_long tcps_rcvbyte; /* bytes received in sequence */
+#ifndef OLDSTAT
+#ifndef OLDSTAT
+ u_long tcps_rcvbadsum; /* packets received with ccksum errs */
+ u_long tcps_rcvbadoff; /* packets received with bad offset */
+ u_long tcps_rcvshort; /* packets received too short */
+#endif