1/*	$NetBSD: tcp.c,v 1.14 2008/04/10 17:14:25 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1999, 2000 Andrew Doran <ad@NetBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#include <sys/cdefs.h>
31#ifndef lint
32__RCSID("$NetBSD: tcp.c,v 1.14 2008/04/10 17:14:25 thorpej Exp $");
33#endif /* not lint */
34
35#include <sys/param.h>
36#include <sys/sysctl.h>
37
38#include <netinet/in.h>
39#include <netinet/in_systm.h>
40#include <netinet/ip.h>
41#include <netinet/ip_var.h>
42#include <netinet/tcp.h>
43#include <netinet/tcp_timer.h>
44#include <netinet/tcp_var.h>
45
46#include <string.h>
47
48#include "systat.h"
49#include "extern.h"
50
51#define LHD(row, str)		mvwprintw(wnd, row, 10, str)
52#define RHD(row, str)		mvwprintw(wnd, row, 45, str)
53#define SHOW(row, col, stat) \
54    mvwprintw(wnd, row, col, "%9llu", (unsigned long long)curstat[stat])
55
56enum update {
57	UPDATE_TIME,
58	UPDATE_BOOT,
59	UPDATE_RUN,
60};
61
62static enum update update = UPDATE_TIME;
63static uint64_t curstat[TCP_NSTATS];
64static uint64_t newstat[TCP_NSTATS];
65static uint64_t oldstat[TCP_NSTATS];
66
67static struct nlist namelist[] = {
68	{ .n_name = "_tcpstat" },
69	{ .n_name = NULL }
70};
71
72WINDOW *
73opentcp(void)
74{
75
76	return (subwin(stdscr, -1, 0, 5, 0));
77}
78
79void
80closetcp(WINDOW *w)
81{
82
83	if (w != NULL) {
84		wclear(w);
85		wrefresh(w);
86		delwin(w);
87	}
88}
89
90void
91labeltcp(void)
92{
93
94	wmove(wnd, 0, 0); wclrtoeol(wnd);
95
96	LHD(0,  "connections initiated");
97	LHD(1,  "connections accepted");
98	LHD(2,  "connections established");
99
100	LHD(4,  "connections dropped");
101	LHD(5,  "  in embryonic state");
102	LHD(6,  "  on retransmit timeout");
103	LHD(7,  "  by keepalive");
104	LHD(8,  "  by persist");
105
106	LHD(10, "potential rtt updates");
107	LHD(11, "successful rtt updates");
108	LHD(12, "delayed acks sent");
109	LHD(13, "retransmit timeouts");
110	LHD(14, "persist timeouts");
111	LHD(15, "keepalive probes");
112	LHD(16, "keepalive timeouts");
113
114	RHD(9,  "total TCP packets received");
115	RHD(10, "  in sequence");
116	RHD(11, "  completely duplicate");
117	RHD(12, "  with some duplicate data");
118	RHD(13, "  out of order");
119	RHD(14, "  duplicate acks");
120	RHD(15, "  acks");
121	RHD(16, "  window probes");
122	RHD(17, "  window updates");
123
124	RHD(0, "total TCP packets sent");
125	RHD(1, "  data");
126	RHD(2, "  data (retransmit)");
127	RHD(3, "  ack-only");
128	RHD(4, "  window probes");
129	RHD(5, "  window updates");
130	RHD(6, "  urgent data only");
131	RHD(7, "  control");
132}
133
134void
135showtcpsyn(void)
136{
137
138	SHOW(0, 0, TCP_STAT_SC_ADDED);
139	SHOW(1, 0, TCP_STAT_SC_COMPLETED);
140	SHOW(2, 0, TCP_STAT_SC_TIMED_OUT);
141	SHOW(3, 0, TCP_STAT_SC_DUPESYN);
142	SHOW(4, 0, TCP_STAT_SC_COLLISIONS);
143	SHOW(5, 0, TCP_STAT_SC_RETRANSMITTED);
144	SHOW(6, 0, TCP_STAT_SC_ABORTED);
145	SHOW(7, 0, TCP_STAT_SC_OVERFLOWED);
146	SHOW(8, 0, TCP_STAT_SC_RESET);
147	SHOW(9, 0, TCP_STAT_SC_UNREACH);
148	SHOW(10, 0, TCP_STAT_SC_BUCKETOVERFLOW);
149	SHOW(11, 0, TCP_STAT_SC_DROPPED);
150}
151
152void
153labeltcpsyn(void)
154{
155
156	wmove(wnd, 0, 0); wclrtoeol(wnd);
157	LHD(0,  "entries added");
158	LHD(1,  "connections completed");
159	LHD(2,  "entries timed out");
160	LHD(3,  "duplicate SYNs received");
161	LHD(4,  "hash collisions");
162	LHD(5,  "retransmissions");
163	LHD(6,  "entries aborted (no memory)");
164	LHD(7,  "dropped (overflow)");
165	LHD(8,  "dropped (RST)");
166	LHD(9,  "dropped (ICMP UNRCH)");
167	LHD(10,  "dropped (bucket overflow)");
168	LHD(11,  "dropped (unreachable/no memory)");
169}
170
171void
172showtcp(void)
173{
174
175	SHOW(0, 0, TCP_STAT_CONNATTEMPT);
176	SHOW(1, 0, TCP_STAT_ACCEPTS);
177	SHOW(2, 0, TCP_STAT_CONNECTS);
178
179	SHOW(4, 0, TCP_STAT_DROPS);
180	SHOW(5, 0, TCP_STAT_CONNDROPS);
181	SHOW(6, 0, TCP_STAT_TIMEOUTDROP);
182	SHOW(7, 0, TCP_STAT_KEEPDROPS);
183	SHOW(8, 0, TCP_STAT_PERSISTDROPS);
184
185	SHOW(10, 0, TCP_STAT_SEGSTIMED);
186	SHOW(11, 0, TCP_STAT_RTTUPDATED);
187	SHOW(12, 0, TCP_STAT_DELACK);
188	SHOW(13, 0, TCP_STAT_REXMTTIMEO);
189	SHOW(14, 0, TCP_STAT_PERSISTTIMEO);
190	SHOW(15, 0, TCP_STAT_KEEPPROBE);
191	SHOW(16, 0, TCP_STAT_KEEPTIMEO);
192
193	SHOW(0, 35, TCP_STAT_SNDTOTAL);
194	SHOW(1, 35, TCP_STAT_SNDPACK);
195	SHOW(2, 35, TCP_STAT_SNDREXMITPACK);
196
197	SHOW(3, 35, TCP_STAT_SNDACKS);
198	SHOW(4, 35, TCP_STAT_SNDPROBE);
199	SHOW(5, 35, TCP_STAT_SNDWINUP);
200	SHOW(6, 35, TCP_STAT_SNDURG);
201	SHOW(7, 35, TCP_STAT_SNDCTRL);
202
203	SHOW(9, 35, TCP_STAT_RCVTOTAL);
204	SHOW(10, 35, TCP_STAT_RCVPACK);
205	SHOW(11, 35, TCP_STAT_RCVDUPPACK);
206	SHOW(12, 35, TCP_STAT_RCVPARTDUPPACK);
207	SHOW(13, 35, TCP_STAT_RCVOOPACK);
208	SHOW(14, 35, TCP_STAT_RCVDUPACK);
209	SHOW(15, 35, TCP_STAT_RCVACKPACK);
210	SHOW(16, 35, TCP_STAT_RCVWINPROBE);
211	SHOW(17, 35, TCP_STAT_RCVWINUPD);
212}
213
214int
215inittcp(void)
216{
217
218	if (! use_sysctl) {
219		if (namelist[0].n_type == 0) {
220			if (kvm_nlist(kd, namelist)) {
221				nlisterr(namelist);
222				return(0);
223			}
224			if (namelist[0].n_type == 0) {
225				error("No namelist");
226				return(0);
227			}
228		}
229	}
230	return 1;
231}
232
233void
234fetchtcp(void)
235{
236	int i;
237
238	if (use_sysctl) {
239		size_t size = sizeof(newstat);
240
241		if (sysctlbyname("net.inet.tcp.stats", newstat, &size,
242				 NULL, 0) == -1)
243			return;
244	} else {
245		KREAD((void *)namelist[0].n_value, newstat, sizeof(newstat));
246	}
247
248	for (i = 0; i < TCP_NSTATS; i++)
249		xADJINETCTR(curstat, oldstat, newstat, i);
250
251	if (update == UPDATE_TIME)
252		memcpy(oldstat, newstat, sizeof(oldstat));
253}
254
255void
256tcp_boot(char *args)
257{
258
259	memset(oldstat, 0, sizeof(oldstat));
260	update = UPDATE_BOOT;
261}
262
263void
264tcp_run(char *args)
265{
266
267	if (update != UPDATE_RUN) {
268		memcpy(oldstat, newstat, sizeof(oldstat));
269		update = UPDATE_RUN;
270	}
271}
272
273void
274tcp_time(char *args)
275{
276
277	if (update != UPDATE_TIME) {
278		memcpy(oldstat, newstat, sizeof(oldstat));
279		update = UPDATE_TIME;
280	}
281}
282
283void
284tcp_zero(char *args)
285{
286
287	if (update == UPDATE_RUN)
288		memcpy(oldstat, newstat, sizeof(oldstat));
289}
290