+/*!\file netinet/tcp_debu.h
+ * TCP debugging.
+ */
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)tcp_debug.h 8.1 (Berkeley) 6/10/93
+ * $Id: tcp_debug.h,v 1.5 1996/04/13 12:45:57 bde Exp $
+ */
+
+#ifndef __NETINET_TCP_DEBUG_H
+#define __NETINET_TCP_DEBUG_H
+
+struct tcp_debug {
+ n_time td_time;
+ short td_act;
+ short td_ostate;
+ caddr_t td_tcb;
+ struct tcpiphdr td_ti;
+ short td_req;
+ struct tcpcb td_cb;
+ };
+
+#define TA_INPUT 0
+#define TA_OUTPUT 1
+#define TA_USER 2
+#define TA_RESPOND 3
+#define TA_DROP 4
+
+#ifdef TANAMES
+static char *tanames[] = {
+ "input", "output", "user", "respond", "drop"
+ };
+#endif
+
+#define TCP_NDEBUG 100
+
+#ifdef TCP_AUTO_DEBUG
+#include <sys/wtime.h>
+
+/* The following table is used as a circular buffer in which TCP
+ * autotuning statistics can be kept.
+ * It is intended that these statistics will be periodically read
+ * by a debugging application using kvm.
+ */
+
+#define TAD_ENTRIES 1024 /* number of entries in monitor_table */
+
+struct tad_entry {
+ u_long seq_no; /* tad entry number */
+ struct timeval time; /* time of entry */
+ u_long snd_cwnd; /* congestion window */
+ u_long sb_hiwat; /* send socket buffer hi water mark */
+ u_long sb_target_hiwat; /* target for same */
+ u_long sb_cc; /* space used in send socket buf */
+ u_long m_clused; /* m_clusters - m_clfree */
+ u_short lport; /* local port number */
+ u_short rport; /* remote port number */
+ u_long debug; /* used for debugging */
+ tcp_seq snd_max; /* highest sequence number sent */
+ } tad_table[TAD_ENTRIES];
+
+extern struct tad_entry *tad_index; /* insert point */
+extern u_long tad_seq;
+extern u_long tad_debug;
+
+/* increment the index into the table
+ */
+#define TAD_INDEX_INCR tad_index = (struct tad_entry*)((u_long)tad_index + \
+ sizeof(struct tad_entry)); \
+ if ((u_long) tad_index >= \
+ (u_long) &tad_table[TAD_ENTRIES]) \
+ tad_index = tad_table;
+
+/* add a log entry to the table
+ */
+#define TAD_SNAPSHOT(tp, so) tad_index->seq_no = tad_seq++; \
+ microtime(&(tad_index->time)); \
+ tad_index->snd_cwnd = tp->snd_cwnd; \
+ tad_index->sb_hiwat = so->so_snd.sb_hiwat; \
+ tad_index->sb_target_hiwat = so->so_snd.sb_net_target; \
+ tad_index->sb_cc = so->so_snd.sb_cc; \
+ tad_index->m_clused = mbstat.m_clusters - mbstat.m_clfree;\
+ tad_index->lport = tp->t_inpcb->inp_lport; \
+ tad_index->rport = tp->t_inpcb->inp_fport; \
+ tad_index->debug = tad_debug; \
+ tad_index->snd_max = tp->snd_max; \
+ TAD_INDEX_INCR;
+
+#endif /* TCP_AUTO_DEBUG */
+
+#endif /* __NETINET_TCP_DEBUG_H */