1/*-
2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
36#endif /* not lint */
37
38/*
39 * netstat
40 */
41#include <sys/param.h>
42#include <sys/socket.h>
43#include <sys/socketvar.h>
44#include <sys/mbuf.h>
45#include <sys/protosw.h>
46#include <sys/queue.h>
47
48#include <netinet/in.h>
49#include <net/route.h>
50#include <netinet/in_systm.h>
51#include <netinet/ip.h>
52#include <netinet/in_pcb.h>
53#include <netinet/ip_icmp.h>
54#include <netinet/icmp_var.h>
55#include <netinet/ip_var.h>
56#include <netinet/tcp.h>
57#include <netinet/tcpip.h>
58#include <netinet/tcp_seq.h>
59#define TCPSTATES
60#include <netinet/tcp_fsm.h>
61#include <netinet/tcp_timer.h>
62#include <netinet/tcp_var.h>
63#include <netinet/tcp_debug.h>
64#include <netinet/udp.h>
65#include <netinet/udp_var.h>
66
67#include <netdb.h>
68#include <stdlib.h>
69#include <string.h>
70#include <nlist.h>
71#include <paths.h>
72#include "systat.h"
73#include "extern.h"
74
75static void enter __P((struct inpcb *, struct socket *, int, char *));
76static char *inetname __P((struct in_addr));
77static void inetprint __P((struct in_addr *, int, char *));
78
79#define streq(a,b) (strcmp(a,b)==0)
80#define YMAX(w) ((w)->maxy-1)
81
82WINDOW *
83opennetstat()
84{
85 sethostent(1);
86 setnetent(1);
87 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
88}
89
90struct netinfo {
91 struct netinfo *ni_forw, *ni_prev;
92 short ni_line; /* line on screen */
93 short ni_seen; /* 0 when not present in list */
94 short ni_flags;
95#define NIF_LACHG 0x1 /* local address changed */
96#define NIF_FACHG 0x2 /* foreign address changed */
97 short ni_state; /* tcp state */
98 char *ni_proto; /* protocol */
99 struct in_addr ni_laddr; /* local address */
100 long ni_lport; /* local port */
101 struct in_addr ni_faddr; /* foreign address */
102 long ni_fport; /* foreign port */
103 long ni_rcvcc; /* rcv buffer character count */
104 long ni_sndcc; /* snd buffer character count */
105};
106
107static struct {
108 struct netinfo *ni_forw, *ni_prev;
109} netcb;
110
111static int aflag = 0;
112static int nflag = 0;
113static int lastrow = 1;
114static void enter(), inetprint();
115static char *inetname();
116
117void
118closenetstat(w)
119 WINDOW *w;
120{
121 register struct netinfo *p;
122
123 endhostent();
124 endnetent();
125 p = (struct netinfo *)netcb.ni_forw;
126 while (p != (struct netinfo *)&netcb) {
127 if (p->ni_line != -1)
128 lastrow--;
129 p->ni_line = -1;
130 p = p->ni_forw;
131 }
132 if (w != NULL) {
133 wclear(w);
134 wrefresh(w);
135 delwin(w);
136 }
137}
138
139static struct nlist namelist[] = {
140#define X_TCB 0
141 { "_tcb" },
142#define X_UDB 1
143 { "_udb" },
144 { "" },
145};
146
147int
148initnetstat()
149{
150 if (kvm_nlist(kd, namelist)) {
151 nlisterr(namelist);
152 return(0);
153 }
154 if (namelist[X_TCB].n_value == 0) {
155 error("No symbols in namelist");
156 return(0);
157 }
158 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
159 protos = TCP|UDP;
160 return(1);
161}
162
163void
164fetchnetstat()
165{
166 register struct inpcb *prev, *next;
167 register struct netinfo *p;
168 struct inpcbhead head;
169 struct inpcb inpcb;
170 struct socket sockb;
171 struct tcpcb tcpcb;
172 void *off;
173 int istcp;
174
175 if (namelist[X_TCB].n_value == 0)
176 return;
177 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
178 p->ni_seen = 0;
179 if (protos&TCP) {
180 off = NPTR(X_TCB);
181 istcp = 1;
182 }
183 else if (protos&UDP) {
184 off = NPTR(X_UDB);
185 istcp = 0;
186 }
187 else {
188 error("No protocols to display");
189 return;
190 }
191again:
192 KREAD(off, &head, sizeof (struct inpcbhead));
193 for (next = head.lh_first; next != NULL; next = inpcb.inp_list.le_next) {
194 KREAD(next, &inpcb, sizeof (inpcb));
195 if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
196 continue;
197 if (nhosts && !checkhost(&inpcb))
198 continue;
199 if (nports && !checkport(&inpcb))
200 continue;
201 KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
202 if (istcp) {
203 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
204 enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
205 } else
206 enter(&inpcb, &sockb, 0, "udp");
207 }
208 if (istcp && (protos&UDP)) {
209 istcp = 0;
210 off = NPTR(X_UDB);
211 goto again;
212 }
213}
214
215static void
216enter(inp, so, state, proto)
217 register struct inpcb *inp;
218 register struct socket *so;
219 int state;
220 char *proto;
221{
222 register struct netinfo *p;
223
224 /*
225 * Only take exact matches, any sockets with
226 * previously unbound addresses will be deleted
227 * below in the display routine because they
228 * will appear as ``not seen'' in the kernel
229 * data structures.
230 */
231 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
232 if (!streq(proto, p->ni_proto))
233 continue;
234 if (p->ni_lport != inp->inp_lport ||
235 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
236 continue;
237 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
238 p->ni_fport == inp->inp_fport)
239 break;
240 }
241 if (p == (struct netinfo *)&netcb) {
242 if ((p = malloc(sizeof(*p))) == NULL) {
243 error("Out of memory");
244 return;
245 }
246 p->ni_prev = (struct netinfo *)&netcb;
247 p->ni_forw = netcb.ni_forw;
248 netcb.ni_forw->ni_prev = p;
249 netcb.ni_forw = p;
250 p->ni_line = -1;
251 p->ni_laddr = inp->inp_laddr;
252 p->ni_lport = inp->inp_lport;
253 p->ni_faddr = inp->inp_faddr;
254 p->ni_fport = inp->inp_fport;
255 p->ni_proto = proto;
256 p->ni_flags = NIF_LACHG|NIF_FACHG;
257 }
258 p->ni_rcvcc = so->so_rcv.sb_cc;
259 p->ni_sndcc = so->so_snd.sb_cc;
260 p->ni_state = state;
261 p->ni_seen = 1;
262}
263
264/* column locations */
265#define LADDR 0
266#define FADDR LADDR+23
267#define PROTO FADDR+23
268#define RCVCC PROTO+6
269#define SNDCC RCVCC+7
270#define STATE SNDCC+7
271
272
273void
274labelnetstat()
275{
276 if (namelist[X_TCB].n_type == 0)
277 return;
278 wmove(wnd, 0, 0); wclrtobot(wnd);
279 mvwaddstr(wnd, 0, LADDR, "Local Address");
280 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
281 mvwaddstr(wnd, 0, PROTO, "Proto");
282 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
283 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
284 mvwaddstr(wnd, 0, STATE, "(state)");
285}
286
287void
288shownetstat()
289{
290 register struct netinfo *p, *q;
291
292 /*
293 * First, delete any connections that have gone
294 * away and adjust the position of connections
295 * below to reflect the deleted line.
296 */
297 p = netcb.ni_forw;
298 while (p != (struct netinfo *)&netcb) {
299 if (p->ni_line == -1 || p->ni_seen) {
300 p = p->ni_forw;
301 continue;
302 }
303 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
304 q = netcb.ni_forw;
305 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
306 if (q != p && q->ni_line > p->ni_line) {
307 q->ni_line--;
308 /* this shouldn't be necessary */
309 q->ni_flags |= NIF_LACHG|NIF_FACHG;
310 }
311 lastrow--;
312 q = p->ni_forw;
313 p->ni_prev->ni_forw = p->ni_forw;
314 p->ni_forw->ni_prev = p->ni_prev;
315 free(p);
316 p = q;
317 }
318 /*
319 * Update existing connections and add new ones.
320 */
321 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
322 if (p->ni_line == -1) {
323 /*
324 * Add a new entry if possible.
325 */
326 if (lastrow > YMAX(wnd))
327 continue;
328 p->ni_line = lastrow++;
329 p->ni_flags |= NIF_LACHG|NIF_FACHG;
330 }
331 if (p->ni_flags & NIF_LACHG) {
332 wmove(wnd, p->ni_line, LADDR);
333 inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
334 p->ni_flags &= ~NIF_LACHG;
335 }
336 if (p->ni_flags & NIF_FACHG) {
337 wmove(wnd, p->ni_line, FADDR);
338 inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
339 p->ni_flags &= ~NIF_FACHG;
340 }
341 mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
342 mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
343 mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
344 if (streq(p->ni_proto, "tcp"))
345 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
346 mvwprintw(wnd, p->ni_line, STATE, "%d",
347 p->ni_state);
348 else
349 mvwaddstr(wnd, p->ni_line, STATE,
350 tcpstates[p->ni_state]);
351 wclrtoeol(wnd);
352 }
353 if (lastrow < YMAX(wnd)) {
354 wmove(wnd, lastrow, 0); wclrtobot(wnd);
355 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
356 }
357}
358
359/*
360 * Pretty print an Internet address (net address + port).
361 * If the nflag was specified, use numbers instead of names.
362 */
363static void
364inetprint(in, port, proto)
365 register struct in_addr *in;
366 int port;
367 char *proto;
368{
369 struct servent *sp = 0;
370 char line[80], *cp, *index();
371
372 sprintf(line, "%.*s.", 16, inetname(*in));
373 cp = index(line, '\0');
374 if (!nflag && port)
375 sp = getservbyport(port, proto);
376 if (sp || port == 0)
377 sprintf(cp, "%.8s", sp ? sp->s_name : "*");
378 else
379 sprintf(cp, "%d", ntohs((u_short)port));
380 /* pad to full column to clear any garbage */
381 cp = index(line, '\0');
382 while (cp - line < 22)
383 *cp++ = ' ';
384 *cp = '\0';
385 waddstr(wnd, line);
386}
387
388/*
389 * Construct an Internet address representation.
390 * If the nflag has been supplied, give
391 * numeric value, otherwise try for symbolic name.
392 */
393static char *
394inetname(in)
395 struct in_addr in;
396{
397 char *cp = 0;
398 static char line[50];
399 struct hostent *hp;
400 struct netent *np;
401
402 if (!nflag && in.s_addr != INADDR_ANY) {
403 int net = inet_netof(in);
404 int lna = inet_lnaof(in);
405
406 if (lna == INADDR_ANY) {
407 np = getnetbyaddr(net, AF_INET);
408 if (np)
409 cp = np->n_name;
410 }
411 if (cp == 0) {
412 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
413 if (hp)
414 cp = hp->h_name;
415 }
416 }
417 if (in.s_addr == INADDR_ANY)
418 strcpy(line, "*");
419 else if (cp)
420 strcpy(line, cp);
421 else {
422 in.s_addr = ntohl(in.s_addr);
423#define C(x) ((x) & 0xff)
424 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
425 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
426 }
427 return (line);
428}
429
430int
431cmdnetstat(cmd, args)
432 char *cmd, *args;
433{
434 register struct netinfo *p;
435
436 if (prefix(cmd, "all")) {
437 aflag = !aflag;
438 goto fixup;
439 }
440 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
441 int new;
442
443 new = prefix(cmd, "numbers");
444 if (new == nflag)
445 return (1);
446 p = netcb.ni_forw;
447 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
448 if (p->ni_line == -1)
449 continue;
450 p->ni_flags |= NIF_LACHG|NIF_FACHG;
451 }
452 nflag = new;
453 goto redisplay;
454 }
455 if (!netcmd(cmd, args))
456 return (0);
457fixup:
458 fetchnetstat();
459redisplay:
460 shownetstat();
461 refresh();
462 return (1);
463}