2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
45 #include <sys/param.h>
46 #include <sys/queue.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
51 #include <netinet/in.h>
52 #include <arpa/inet.h>
53 #include <net/route.h>
54 #include <netinet/in_systm.h>
55 #include <netinet/ip.h>
57 #include <netinet/ip6.h>
59 #include <netinet/in_pcb.h>
60 #include <netinet/ip_icmp.h>
61 #include <netinet/icmp_var.h>
62 #include <netinet/ip_var.h>
63 #include <netinet/tcp.h>
64 #include <netinet/tcpip.h>
65 #include <netinet/tcp_seq.h>
66 #include <netinet/tcp_var.h>
68 #include <netinet/tcp_fsm.h>
69 #include <netinet/tcp_timer.h>
70 #include <netinet/tcp_var.h>
71 #include <netinet/tcp_debug.h>
72 #include <netinet/udp.h>
73 #include <netinet/udp_var.h>
84 static struct netinfo *enter(struct inpcb *, int, const char *);
85 static void enter_kvm(struct inpcb *, struct socket *, int, const char *);
86 static void enter_sysctl(struct inpcb *, struct xsocket *, int, const char *);
87 static void fetchnetstat_kvm(void);
88 static void fetchnetstat_sysctl(void);
89 static char *inetname(struct sockaddr *);
90 static void inetprint(struct sockaddr *, const char *);
92 #define streq(a,b) (strcmp(a,b)==0)
93 #define YMAX(w) ((w)->_maxy-1)
100 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
104 TAILQ_ENTRY(netinfo) chain;
105 short ni_line; /* line on screen */
106 short ni_seen; /* 0 when not present in list */
108 #define NIF_LACHG 0x1 /* local address changed */
109 #define NIF_FACHG 0x2 /* foreign address changed */
110 short ni_state; /* tcp state */
111 const char *ni_proto; /* protocol */
112 struct sockaddr_storage ni_lsa; /* local address */
113 struct sockaddr_storage ni_fsa; /* foreign address */
114 u_int ni_rcvcc; /* rcv buffer character count */
115 u_int ni_sndcc; /* snd buffer character count */
118 TAILQ_HEAD(netinfohead, netinfo) netcb = TAILQ_HEAD_INITIALIZER(netcb);
120 static int aflag = 0;
121 static int nflag = 0;
122 static int lastrow = 1;
125 closenetstat(WINDOW *w)
131 TAILQ_FOREACH(p, &netcb, chain) {
132 if (p->ni_line != -1)
143 static const char *miblist[] = {
144 "net.inet.tcp.pcblist",
145 "net.inet.udp.pcblist"
148 static char tcb[] = "tcb", udb[] = "udb";
150 struct nlist namelist[] = {
171 fetchnetstat_sysctl();
175 fetchnetstat_kvm(void)
179 struct inpcbhead head;
186 if (namelist[X_TCB].n_value == 0)
188 TAILQ_FOREACH(p, &netcb, chain)
194 else if (protos&UDP) {
199 error("No protocols to display");
203 KREAD(off, &head, sizeof (struct inpcbhead));
204 LIST_FOREACH(next, &head, inp_list) {
205 KREAD(next, &inpcb, sizeof (inpcb));
208 if (inpcb.inp_vflag & INP_IPV4) {
209 if (inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
213 else if (inpcb.inp_vflag & INP_IPV6) {
214 if (memcmp(&inpcb.in6p_laddr,
215 &in6addr_any, sizeof(in6addr_any)) == 0)
220 if (nhosts && !checkhost(&inpcb))
222 if (nports && !checkport(&inpcb))
225 if (inpcb.inp_vflag & INP_TIMEWAIT) {
226 bzero(&sockb, sizeof(sockb));
227 enter_kvm(&inpcb, &sockb, TCPS_TIME_WAIT,
230 KREAD(inpcb.inp_socket, &sockb,
232 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
233 enter_kvm(&inpcb, &sockb, tcpcb.t_state,
237 enter_kvm(&inpcb, &sockb, 0, "udp");
239 if (istcp && (protos&UDP)) {
247 fetchnetstat_sysctl(void)
251 struct xinpgen *inpg;
254 struct xinpcb *xip = NULL;
255 struct xtcpcb *xtp = NULL;
259 TAILQ_FOREACH(p, &netcb, chain)
263 } else if (protos&UDP) {
266 error("No protocols to display");
270 for (;idx < 2; idx++) {
271 if (idx == 1 && !(protos&UDP))
273 inpg = (struct xinpgen *)sysctl_dynread(miblist[idx], &lsz);
275 error("sysctl(%s...) failed", miblist[idx]);
279 * We currently do no require a consistent pcb list.
280 * Try to be robust in case of struct size changes
282 cur = ((char *)inpg) + inpg->xig_len;
283 /* There is also a trailing struct xinpgen */
284 end = ((char *)inpg) + lsz - inpg->xig_len;
289 if (idx == 0) { /* TCP */
290 xtp = (struct xtcpcb *)cur;
293 xip = (struct xinpcb *)cur;
296 while (cur + plen <= end) {
297 if (idx == 0) { /* TCP */
298 xtp = (struct xtcpcb *)cur;
299 inpcb = &xtp->xt_inp;
301 xip = (struct xinpcb *)cur;
302 inpcb = &xip->xi_inp;
307 if (inpcb->inp_vflag & INP_IPV4) {
308 if (inet_lnaof(inpcb->inp_laddr) ==
313 else if (inpcb->inp_vflag & INP_IPV6) {
314 if (memcmp(&inpcb->in6p_laddr,
315 &in6addr_any, sizeof(in6addr_any))
321 if (nhosts && !checkhost(inpcb))
323 if (nports && !checkport(inpcb))
325 if (idx == 0) /* TCP */
326 enter_sysctl(inpcb, &xtp->xt_socket,
327 xtp->xt_tp.t_state, "tcp");
329 enter_sysctl(inpcb, &xip->xi_socket, 0, "udp");
336 enter_kvm(struct inpcb *inp, struct socket *so, int state, const char *proto)
340 if ((p = enter(inp, state, proto)) != NULL) {
341 p->ni_rcvcc = so->so_rcv.sb_cc;
342 p->ni_sndcc = so->so_snd.sb_cc;
347 enter_sysctl(struct inpcb *inp, struct xsocket *so, int state, const char *proto)
351 if ((p = enter(inp, state, proto)) != NULL) {
352 p->ni_rcvcc = so->so_rcv.sb_cc;
353 p->ni_sndcc = so->so_snd.sb_cc;
358 static struct netinfo *
359 enter(struct inpcb *inp, int state, const char *proto)
362 struct sockaddr_storage lsa, fsa;
363 struct sockaddr_in *sa4;
365 struct sockaddr_in6 *sa6;
368 memset(&lsa, 0, sizeof(lsa));
369 memset(&fsa, 0, sizeof(fsa));
370 if (inp->inp_vflag & INP_IPV4) {
371 sa4 = (struct sockaddr_in *)&lsa;
372 sa4->sin_addr = inp->inp_laddr;
373 sa4->sin_port = inp->inp_lport;
374 sa4->sin_family = AF_INET;
375 sa4->sin_len = sizeof(struct sockaddr_in);
377 sa4 = (struct sockaddr_in *)&fsa;
378 sa4->sin_addr = inp->inp_faddr;
379 sa4->sin_port = inp->inp_fport;
380 sa4->sin_family = AF_INET;
381 sa4->sin_len = sizeof(struct sockaddr_in);
384 else if (inp->inp_vflag & INP_IPV6) {
385 sa6 = (struct sockaddr_in6 *)&lsa;
386 memcpy(&sa6->sin6_addr, &inp->in6p_laddr,
387 sizeof(struct in6_addr));
388 sa6->sin6_port = inp->inp_lport;
389 sa6->sin6_family = AF_INET6;
390 sa6->sin6_len = sizeof(struct sockaddr_in6);
392 sa6 = (struct sockaddr_in6 *)&fsa;
393 memcpy(&sa6->sin6_addr, &inp->in6p_faddr,
394 sizeof(struct in6_addr));
395 sa6->sin6_port = inp->inp_fport;
396 sa6->sin6_family = AF_INET6;
397 sa6->sin6_len = sizeof(struct sockaddr_in6);
404 * Only take exact matches, any sockets with
405 * previously unbound addresses will be deleted
406 * below in the display routine because they
407 * will appear as ``not seen'' in the kernel
410 TAILQ_FOREACH(p, &netcb, chain) {
411 if (!streq(proto, p->ni_proto))
413 if (p->ni_lsa.ss_family != lsa.ss_family ||
414 memcmp(&p->ni_lsa, &lsa, lsa.ss_len) != 0)
416 if (p->ni_fsa.ss_family == fsa.ss_family &&
417 memcmp(&p->ni_fsa, &fsa, fsa.ss_len) == 0)
421 if ((p = malloc(sizeof(*p))) == NULL) {
422 error("Out of memory");
425 TAILQ_INSERT_HEAD(&netcb, p, chain);
427 memcpy(&p->ni_lsa, &lsa, lsa.ss_len);
428 memcpy(&p->ni_fsa, &fsa, fsa.ss_len);
429 p->ni_proto = strdup(proto);
430 p->ni_flags = NIF_LACHG|NIF_FACHG;
437 /* column locations */
439 #define FADDR LADDR+23
440 #define PROTO FADDR+23
441 #define RCVCC PROTO+6
442 #define SNDCC RCVCC+7
443 #define STATE SNDCC+7
449 if (use_kvm && namelist[X_TCB].n_type == 0)
451 wmove(wnd, 0, 0); wclrtobot(wnd);
452 mvwaddstr(wnd, 0, LADDR, "Local Address");
453 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
454 mvwaddstr(wnd, 0, PROTO, "Proto");
455 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
456 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
457 mvwaddstr(wnd, 0, STATE, "(state)");
463 struct netinfo *p, *q;
465 const char *family = "";
468 * First, delete any connections that have gone
469 * away and adjust the position of connections
470 * below to reflect the deleted line.
472 p = TAILQ_FIRST(&netcb);
474 if (p->ni_line == -1 || p->ni_seen) {
475 p = TAILQ_NEXT(p, chain);
478 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
479 TAILQ_FOREACH(q, &netcb, chain)
480 if (q != p && q->ni_line > p->ni_line) {
482 /* this shouldn't be necessary */
483 q->ni_flags |= NIF_LACHG|NIF_FACHG;
486 q = TAILQ_NEXT(p, chain);
487 TAILQ_REMOVE(&netcb, p, chain);
492 * Update existing connections and add new ones.
494 TAILQ_FOREACH(p, &netcb, chain) {
495 if (p->ni_line == -1) {
497 * Add a new entry if possible.
499 if (lastrow > YMAX(wnd))
501 p->ni_line = lastrow++;
502 p->ni_flags |= NIF_LACHG|NIF_FACHG;
504 if (p->ni_flags & NIF_LACHG) {
505 wmove(wnd, p->ni_line, LADDR);
506 inetprint((struct sockaddr *)&p->ni_lsa, p->ni_proto);
507 p->ni_flags &= ~NIF_LACHG;
509 if (p->ni_flags & NIF_FACHG) {
510 wmove(wnd, p->ni_line, FADDR);
511 inetprint((struct sockaddr *)&p->ni_fsa, p->ni_proto);
512 p->ni_flags &= ~NIF_FACHG;
515 family = (p->ni_lsa.ss_family == AF_INET) ? "4" : "6";
517 snprintf(proto, sizeof(proto), "%s%s", p->ni_proto, family);
518 mvwaddstr(wnd, p->ni_line, PROTO, proto);
519 mvwprintw(wnd, p->ni_line, RCVCC, "%6u", p->ni_rcvcc);
520 mvwprintw(wnd, p->ni_line, SNDCC, "%6u", p->ni_sndcc);
521 if (streq(p->ni_proto, "tcp")) {
522 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
523 mvwprintw(wnd, p->ni_line, STATE, "%d",
526 mvwaddstr(wnd, p->ni_line, STATE,
527 tcpstates[p->ni_state]);
531 if (lastrow < YMAX(wnd)) {
532 wmove(wnd, lastrow, 0); wclrtobot(wnd);
533 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
538 * Pretty print an Internet address (net address + port).
539 * If the nflag was specified, use numbers instead of names.
542 inetprint(struct sockaddr *sa, const char *proto)
544 struct servent *sp = 0;
548 switch (sa->sa_family) {
550 port = ((struct sockaddr_in *)sa)->sin_port;
554 port = ((struct sockaddr_in6 *)sa)->sin6_port;
561 snprintf(line, sizeof(line), "%.*s.", 16, inetname(sa));
562 cp = index(line, '\0');
564 sp = getservbyport(port, proto);
566 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
567 sp ? sp->s_name : "*");
569 snprintf(cp, sizeof(line) - (cp - line), "%d",
570 ntohs((u_short)port));
571 /* pad to full column to clear any garbage */
572 cp = index(line, '\0');
573 while (cp - line < 22)
580 * Construct an Internet address representation.
581 * If the nflag has been supplied, give
582 * numeric value, otherwise try for symbolic name.
585 inetname(struct sockaddr *sa)
588 static char line[NI_MAXHOST];
594 if (sa->sa_family == AF_INET6) {
595 if (memcmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
596 &in6addr_any, sizeof(in6addr_any)) == 0)
599 getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
600 nflag ? NI_NUMERICHOST : 0);
605 in = ((struct sockaddr_in *)sa)->sin_addr;
606 if (!nflag && in.s_addr != INADDR_ANY) {
607 int net = inet_netof(in);
608 int lna = inet_lnaof(in);
610 if (lna == INADDR_ANY) {
611 np = getnetbyaddr(net, AF_INET);
616 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
621 if (in.s_addr == INADDR_ANY)
624 snprintf(line, sizeof(line), "%s", cp);
626 in.s_addr = ntohl(in.s_addr);
627 #define C(x) ((x) & 0xff)
628 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
629 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
635 cmdnetstat(const char *cmd, const char *args)
637 if (prefix(cmd, "all")) {
641 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
645 new = prefix(cmd, "numbers");
648 TAILQ_FOREACH(p, &netcb, chain) {
649 if (p->ni_line == -1)
651 p->ni_flags |= NIF_LACHG|NIF_FACHG;
656 if (!netcmd(cmd, args))