Remove some unnecessary casts.
[dragonfly.git] / usr.bin / systat / netstat.c
CommitLineData
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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.
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32 *
33 * @(#)netstat.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/systat/netstat.c,v 1.13 1999/08/30 08:18:08 peter Exp $
cae49b89 35 * $DragonFly: src/usr.bin/systat/netstat.c,v 1.11 2008/11/10 04:59:45 swildner Exp $
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36 */
37
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38/*
39 * netstat
40 */
41#include <sys/param.h>
42#include <sys/queue.h>
43#include <sys/socket.h>
44#include <sys/socketvar.h>
45#include <sys/protosw.h>
7e4319f4 46#include <sys/sysctl.h>
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47
48#include <netinet/in.h>
49#include <arpa/inet.h>
50#include <net/route.h>
51#include <netinet/in_systm.h>
52#include <netinet/ip.h>
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53#ifdef INET6
54#include <netinet/ip6.h>
55#endif
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56#include <netinet/in_pcb.h>
57#include <netinet/ip_icmp.h>
58#include <netinet/icmp_var.h>
59#include <netinet/ip_var.h>
60#include <netinet/tcp.h>
61#include <netinet/tcpip.h>
62#include <netinet/tcp_seq.h>
63#define TCPSTATES
64#include <netinet/tcp_fsm.h>
65#include <netinet/tcp_timer.h>
66#include <netinet/tcp_var.h>
67#include <netinet/tcp_debug.h>
68#include <netinet/udp.h>
69#include <netinet/udp_var.h>
70
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71#include <err.h>
72#include <errno.h>
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73#include <netdb.h>
74#include <stdlib.h>
75#include <string.h>
76#include <nlist.h>
77#include <paths.h>
78#include "systat.h"
79#include "extern.h"
80
8d7c364e 81static void enter(struct inpcb *, struct xsocket *, int, const char *);
1d1731fa 82static char *inetname(struct in_addr);
7e4319f4 83static void inetprint(struct in_addr *, int, const char *);
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84
85#define streq(a,b) (strcmp(a,b)==0)
86#define YMAX(w) ((w)->_maxy-1)
87
88WINDOW *
1d1731fa 89opennetstat(void)
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90{
91 sethostent(1);
92 setnetent(1);
93 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
94}
95
96struct netinfo {
97 struct netinfo *ni_forw, *ni_prev;
98 short ni_line; /* line on screen */
99 short ni_seen; /* 0 when not present in list */
100 short ni_flags;
101#define NIF_LACHG 0x1 /* local address changed */
102#define NIF_FACHG 0x2 /* foreign address changed */
103 short ni_state; /* tcp state */
7e4319f4 104 const char *ni_proto; /* protocol */
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105 struct in_addr ni_laddr; /* local address */
106 long ni_lport; /* local port */
107 struct in_addr ni_faddr; /* foreign address */
108 long ni_fport; /* foreign port */
109 long ni_rcvcc; /* rcv buffer character count */
110 long ni_sndcc; /* snd buffer character count */
111};
112
113static struct {
114 struct netinfo *ni_forw, *ni_prev;
115} netcb;
116
117static int aflag = 0;
118static int nflag = 0;
119static int lastrow = 1;
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120
121void
1d1731fa 122closenetstat(WINDOW *w)
984263bc 123{
815943a9 124 struct netinfo *p;
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125
126 endhostent();
127 endnetent();
128 p = (struct netinfo *)netcb.ni_forw;
129 while (p != (struct netinfo *)&netcb) {
130 if (p->ni_line != -1)
131 lastrow--;
132 p->ni_line = -1;
133 p = p->ni_forw;
134 }
135 if (w != NULL) {
136 wclear(w);
137 wrefresh(w);
138 delwin(w);
139 }
140}
141
984263bc 142int
1d1731fa 143initnetstat(void)
984263bc 144{
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145 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
146 protos = TCP|UDP;
147 return(1);
148}
149
7e4319f4 150static void
8d7c364e 151enter_tcp(void *xig)
984263bc 152{
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153 struct xtcpcb *xtcp = (struct xtcpcb *)xig;
154 struct xsocket *xso;
155 int state;
156
8d7c364e 157 if (xtcp->xt_len < sizeof(*xtcp))
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158 return;
159 xso = &xtcp->xt_socket;
160 state = xtcp->xt_tp.t_state;
8d7c364e 161 enter(&xtcp->xt_inp, xso, state, "tcp");
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162}
163
164static void
8d7c364e 165enter_udp(void *xig)
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166{
167 struct xinpcb *xinp = (struct xinpcb *)xig;
168 struct xsocket *xso;
169
8d7c364e 170 if (xinp->xi_len < sizeof(*xinp))
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171 return;
172 xso = &xinp->xi_socket;
8d7c364e 173 enter(&xinp->xi_inp, xso, 0, "udp");
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174}
175
176static void
8d7c364e 177fetchnetstat_proto(void (*enter_proto)(void *),
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178 const char *mibvar)
179{
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180 char *buf, *buf2;
181 size_t i, len, elem_len;
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182
183 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
184 if (errno != ENOENT)
185 warn("sysctl: %s", mibvar);
984263bc 186 return;
984263bc 187 }
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188 if ((buf = malloc(len)) == NULL) {
189 warn("malloc %lu bytes", (u_long)len);
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190 return;
191 }
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192 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
193 warn("sysctl: %s", mibvar);
194 free(buf);
195 return;
984263bc 196 }
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197
198 /*
199 * XXX this is better with a single PCB type
200 */
201 if (len == 0) {
202 free(buf);
203 return;
204 }
205 if (len < sizeof(size_t)) {
206 warnx("sysctl: short read");
207 free(buf);
208 return;
209 }
210 elem_len = *(size_t *)buf;
211 len /= elem_len;
212 buf2 = buf;
213 for (i = 0; i < len; i++, buf2 += elem_len) {
214 if (*(size_t *)(buf2) != elem_len) {
215 warn("sysctl: inconsistent PCB len");
216 free(buf);
217 return;
7e4319f4 218 }
8d7c364e 219 enter_proto(buf2);
984263bc 220 }
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221 free(buf);
222}
223
224void
225fetchnetstat(void)
226{
815943a9 227 struct netinfo *p;
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228
229 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
230 p->ni_seen = 0;
231 if (protos & TCP)
232 fetchnetstat_proto(enter_tcp, "net.inet.tcp.pcblist");
233 if (protos & UDP)
234 fetchnetstat_proto(enter_udp, "net.inet.udp.pcblist");
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235}
236
237static void
8d7c364e 238enter(struct inpcb *inp, struct xsocket *so, int state, const char *proto)
984263bc 239{
815943a9 240 struct netinfo *p;
984263bc 241
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242 if (!aflag && inet_lnaof(inp->inp_laddr) == INADDR_ANY)
243 return;
244 if (nhosts && !checkhost(inp))
245 return;
246 if (nports && !checkport(inp))
247 return;
248 /*
249 * pcblist may return non-ipv4 sockets, but at the moment
250 * -netstat code doesn't support other than ipv4.
251 */
252 if ((inp->inp_vflag & INP_IPV4) == 0)
253 return;
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254 /*
255 * Only take exact matches, any sockets with
256 * previously unbound addresses will be deleted
257 * below in the display routine because they
258 * will appear as ``not seen'' in the kernel
259 * data structures.
260 */
261 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
262 if (!streq(proto, p->ni_proto))
263 continue;
264 if (p->ni_lport != inp->inp_lport ||
265 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
266 continue;
267 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
268 p->ni_fport == inp->inp_fport)
269 break;
270 }
271 if (p == (struct netinfo *)&netcb) {
272 if ((p = malloc(sizeof(*p))) == NULL) {
273 error("Out of memory");
274 return;
275 }
276 p->ni_prev = (struct netinfo *)&netcb;
277 p->ni_forw = netcb.ni_forw;
278 netcb.ni_forw->ni_prev = p;
279 netcb.ni_forw = p;
280 p->ni_line = -1;
281 p->ni_laddr = inp->inp_laddr;
282 p->ni_lport = inp->inp_lport;
283 p->ni_faddr = inp->inp_faddr;
284 p->ni_fport = inp->inp_fport;
285 p->ni_proto = proto;
286 p->ni_flags = NIF_LACHG|NIF_FACHG;
287 }
288 p->ni_rcvcc = so->so_rcv.sb_cc;
289 p->ni_sndcc = so->so_snd.sb_cc;
290 p->ni_state = state;
291 p->ni_seen = 1;
292}
293
294/* column locations */
295#define LADDR 0
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296#define FADDR LADDR+22
297#define CPUID FADDR+22
298#define PROTO CPUID+4
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299#define RCVCC PROTO+6
300#define SNDCC RCVCC+7
301#define STATE SNDCC+7
302
303
304void
1d1731fa 305labelnetstat(void)
984263bc 306{
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307 wmove(wnd, 0, 0); wclrtobot(wnd);
308 mvwaddstr(wnd, 0, LADDR, "Local Address");
309 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
310 mvwaddstr(wnd, 0, PROTO, "Proto");
311 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
312 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
313 mvwaddstr(wnd, 0, STATE, "(state)");
314}
315
316void
1d1731fa 317shownetstat(void)
984263bc 318{
815943a9 319 struct netinfo *p, *q;
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320
321 /*
322 * First, delete any connections that have gone
323 * away and adjust the position of connections
324 * below to reflect the deleted line.
325 */
326 p = netcb.ni_forw;
327 while (p != (struct netinfo *)&netcb) {
328 if (p->ni_line == -1 || p->ni_seen) {
329 p = p->ni_forw;
330 continue;
331 }
332 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
333 q = netcb.ni_forw;
334 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
335 if (q != p && q->ni_line > p->ni_line) {
336 q->ni_line--;
337 /* this shouldn't be necessary */
338 q->ni_flags |= NIF_LACHG|NIF_FACHG;
339 }
340 lastrow--;
341 q = p->ni_forw;
342 p->ni_prev->ni_forw = p->ni_forw;
343 p->ni_forw->ni_prev = p->ni_prev;
344 free(p);
345 p = q;
346 }
347 /*
348 * Update existing connections and add new ones.
349 */
350 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
351 if (p->ni_line == -1) {
352 /*
353 * Add a new entry if possible.
354 */
355 if (lastrow > YMAX(wnd))
356 continue;
357 p->ni_line = lastrow++;
358 p->ni_flags |= NIF_LACHG|NIF_FACHG;
359 }
360 if (p->ni_flags & NIF_LACHG) {
361 wmove(wnd, p->ni_line, LADDR);
362 inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
363 p->ni_flags &= ~NIF_LACHG;
364 }
365 if (p->ni_flags & NIF_FACHG) {
366 wmove(wnd, p->ni_line, FADDR);
367 inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
368 p->ni_flags &= ~NIF_FACHG;
369 }
370 mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
371 mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
372 mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
cae49b89 373 if (streq(p->ni_proto, "tcp")) {
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374 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
375 mvwprintw(wnd, p->ni_line, STATE, "%d",
376 p->ni_state);
377 else
378 mvwaddstr(wnd, p->ni_line, STATE,
379 tcpstates[p->ni_state]);
cae49b89 380 }
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381 wclrtoeol(wnd);
382 }
383 if (lastrow < YMAX(wnd)) {
384 wmove(wnd, lastrow, 0); wclrtobot(wnd);
385 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
386 }
387}
388
389/*
390 * Pretty print an Internet address (net address + port).
391 * If the nflag was specified, use numbers instead of names.
392 */
393static void
815943a9 394inetprint(struct in_addr *in, int port, const char *proto)
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395{
396 struct servent *sp = 0;
399bbc32 397 char line[80], *cp;
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398
399 snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
43b4d1bd 400 cp = strchr(line, '\0');
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401 if (!nflag && port)
402 sp = getservbyport(port, proto);
403 if (sp || port == 0)
404 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
405 sp ? sp->s_name : "*");
406 else
407 snprintf(cp, sizeof(line) - (cp - line), "%d",
408 ntohs((u_short)port));
409 /* pad to full column to clear any garbage */
43b4d1bd 410 cp = strchr(line, '\0');
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411 while (cp - line < 22)
412 *cp++ = ' ';
413 line[22] = '\0';
414 waddstr(wnd, line);
415}
416
417/*
418 * Construct an Internet address representation.
419 * If the nflag has been supplied, give
420 * numeric value, otherwise try for symbolic name.
421 */
422static char *
1d1731fa 423inetname(struct in_addr in)
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424{
425 char *cp = 0;
426 static char line[50];
427 struct hostent *hp;
428 struct netent *np;
429
430 if (!nflag && in.s_addr != INADDR_ANY) {
431 int net = inet_netof(in);
432 int lna = inet_lnaof(in);
433
434 if (lna == INADDR_ANY) {
435 np = getnetbyaddr(net, AF_INET);
436 if (np)
437 cp = np->n_name;
438 }
439 if (cp == 0) {
15b85273 440 hp = gethostbyaddr(&in, sizeof (in), AF_INET);
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441 if (hp)
442 cp = hp->h_name;
443 }
444 }
445 if (in.s_addr == INADDR_ANY)
446 strcpy(line, "*");
447 else if (cp)
448 snprintf(line, sizeof(line), "%s", cp);
449 else {
450 in.s_addr = ntohl(in.s_addr);
451#define C(x) ((x) & 0xff)
452 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
453 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
454 }
455 return (line);
456}
457
458int
cae49b89 459cmdnetstat(const char *cmd, char *args)
984263bc 460{
815943a9 461 struct netinfo *p;
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462
463 if (prefix(cmd, "all")) {
464 aflag = !aflag;
465 goto fixup;
466 }
467 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
468 int new;
469
470 new = prefix(cmd, "numbers");
471 if (new == nflag)
472 return (1);
473 p = netcb.ni_forw;
474 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
475 if (p->ni_line == -1)
476 continue;
477 p->ni_flags |= NIF_LACHG|NIF_FACHG;
478 }
479 nflag = new;
480 goto redisplay;
481 }
482 if (!netcmd(cmd, args))
483 return (0);
484fixup:
485 fetchnetstat();
486redisplay:
487 shownetstat();
488 refresh();
489 return (1);
490}