2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/param.h>
38 #include <sys/queue.h>
39 #include <sys/socket.h>
40 #include <sys/callout.h>
42 #include <sys/socketvar.h>
43 #include <sys/protosw.h>
45 #include <netinet/in.h>
46 #include <arpa/inet.h>
47 #include <net/route.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
51 #include <netinet/ip6.h>
54 #include <netinet/in_pcb.h>
55 #include <netinet/ip_icmp.h>
56 #include <netinet/icmp_var.h>
57 #include <netinet/ip_var.h>
58 #include <netinet/tcp.h>
59 #include <netinet/tcpip.h>
60 #include <netinet/tcp_seq.h>
62 #include <netinet/tcp_fsm.h>
63 #include <netinet/tcp_timer.h>
65 #include <netinet/tcp_var.h>
66 #include <netinet/udp.h>
67 #include <netinet/udp_var.h>
78 static struct netinfo *enter(struct in_conninfo *, uint8_t, int, const char *);
79 static void enter_kvm(struct inpcb *, struct socket *, int, const char *);
80 static void enter_sysctl(struct xinpcb *, struct xsocket *, int, const char *);
81 static void fetchnetstat_kvm(void);
82 static void fetchnetstat_sysctl(void);
83 static char *inetname(struct sockaddr *);
84 static void inetprint(struct sockaddr *, const char *);
86 #define streq(a,b) (strcmp(a,b)==0)
87 #define YMAX(w) (getmaxy(w)-2)
94 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
98 TAILQ_ENTRY(netinfo) chain;
99 short ni_line; /* line on screen */
100 short ni_seen; /* 0 when not present in list */
102 #define NIF_LACHG 0x1 /* local address changed */
103 #define NIF_FACHG 0x2 /* foreign address changed */
104 short ni_state; /* tcp state */
105 const char *ni_proto; /* protocol */
106 struct sockaddr_storage ni_lsa; /* local address */
107 struct sockaddr_storage ni_fsa; /* foreign address */
108 u_int ni_rcvcc; /* rcv buffer character count */
109 u_int ni_sndcc; /* snd buffer character count */
112 static TAILQ_HEAD(netinfohead, netinfo) netcb = TAILQ_HEAD_INITIALIZER(netcb);
114 static int aflag = 0;
115 static int nflag = 0;
116 static int lastrow = 1;
119 closenetstat(WINDOW *w)
125 TAILQ_FOREACH(p, &netcb, chain) {
126 if (p->ni_line != -1)
137 static const char *miblist[] = {
138 "net.inet.tcp.pcblist",
139 "net.inet.udp.pcblist"
142 static char tcb[] = "tcb", udb[] = "udb";
144 struct nlist namelist[] = {
165 fetchnetstat_sysctl();
169 fetchnetstat_kvm(void)
173 struct inpcbhead head;
180 if (namelist[X_TCB].n_value == 0)
182 TAILQ_FOREACH(p, &netcb, chain)
188 else if (protos&UDP) {
193 error("No protocols to display");
197 KREAD(off, &head, sizeof (struct inpcbhead));
198 LIST_FOREACH(next, &head, inp_list) {
199 KREAD(next, &inpcb, sizeof (inpcb));
202 if (inpcb.inp_vflag & INP_IPV4) {
203 if (inpcb.inp_laddr.s_addr == INADDR_ANY)
207 else if (inpcb.inp_vflag & INP_IPV6) {
208 if (memcmp(&inpcb.in6p_laddr,
209 &in6addr_any, sizeof(in6addr_any)) == 0)
214 if (nhosts && !checkhost(&inpcb.inp_inc))
216 if (nports && !checkport(&inpcb.inp_inc))
219 KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
220 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
221 enter_kvm(&inpcb, &sockb, tcpcb.t_state, "tcp");
223 enter_kvm(&inpcb, &sockb, 0, "udp");
225 if (istcp && (protos&UDP)) {
233 fetchnetstat_sysctl(void)
237 struct xinpgen *inpg;
239 struct xinpcb *xip = NULL;
240 struct xtcpcb *xtp = NULL;
244 TAILQ_FOREACH(p, &netcb, chain)
248 } else if (protos&UDP) {
251 error("No protocols to display");
255 for (;idx < 2; idx++) {
256 if (idx == 1 && !(protos&UDP))
258 inpg = (struct xinpgen *)sysctl_dynread(miblist[idx], &lsz);
260 error("sysctl(%s...) failed", miblist[idx]);
264 * We currently do no require a consistent pcb list.
265 * Try to be robust in case of struct size changes
267 cur = ((char *)inpg) + inpg->xig_len;
268 /* There is also a trailing struct xinpgen */
269 end = ((char *)inpg) + lsz - inpg->xig_len;
274 if (idx == 0) { /* TCP */
275 xtp = (struct xtcpcb *)cur;
278 xip = (struct xinpcb *)cur;
281 while (cur + plen <= end) {
282 if (idx == 0) { /* TCP */
283 xtp = (struct xtcpcb *)cur;
286 xip = (struct xinpcb *)cur;
291 if (xip->inp_vflag & INP_IPV4) {
292 if (xip->inp_laddr.s_addr == INADDR_ANY)
296 else if (xip->inp_vflag & INP_IPV6) {
297 if (memcmp(&xip->in6p_laddr,
298 &in6addr_any, sizeof(in6addr_any))
304 if (nhosts && !checkhost(&xip->inp_inc))
306 if (nports && !checkport(&xip->inp_inc))
309 enter_sysctl(xip, &xip->xi_socket,
310 xtp->t_state, "tcp");
312 enter_sysctl(xip, &xip->xi_socket, 0, "udp");
319 enter_kvm(struct inpcb *inp, struct socket *so, int state, const char *proto)
323 if ((p = enter(&inp->inp_inc, inp->inp_vflag, state, proto)) != NULL) {
324 p->ni_rcvcc = so->so_rcv.sb_ccc;
325 p->ni_sndcc = so->so_snd.sb_ccc;
330 enter_sysctl(struct xinpcb *xip, struct xsocket *so, int state,
335 if ((p = enter(&xip->inp_inc, xip->inp_vflag, state, proto)) != NULL) {
336 p->ni_rcvcc = so->so_rcv.sb_cc;
337 p->ni_sndcc = so->so_snd.sb_cc;
341 static struct netinfo *
342 enter(struct in_conninfo *inc, uint8_t vflag, int state, const char *proto)
345 struct sockaddr_storage lsa, fsa;
346 struct sockaddr_in *sa4;
348 struct sockaddr_in6 *sa6;
351 memset(&lsa, 0, sizeof(lsa));
352 memset(&fsa, 0, sizeof(fsa));
353 if (vflag & INP_IPV4) {
354 sa4 = (struct sockaddr_in *)&lsa;
355 sa4->sin_addr = inc->inc_laddr;
356 sa4->sin_port = inc->inc_lport;
357 sa4->sin_family = AF_INET;
358 sa4->sin_len = sizeof(struct sockaddr_in);
360 sa4 = (struct sockaddr_in *)&fsa;
361 sa4->sin_addr = inc->inc_faddr;
362 sa4->sin_port = inc->inc_fport;
363 sa4->sin_family = AF_INET;
364 sa4->sin_len = sizeof(struct sockaddr_in);
367 else if (vflag & INP_IPV6) {
368 sa6 = (struct sockaddr_in6 *)&lsa;
369 memcpy(&sa6->sin6_addr, &inc->inc6_laddr,
370 sizeof(struct in6_addr));
371 sa6->sin6_port = inc->inc_lport;
372 sa6->sin6_family = AF_INET6;
373 sa6->sin6_len = sizeof(struct sockaddr_in6);
375 sa6 = (struct sockaddr_in6 *)&fsa;
376 memcpy(&sa6->sin6_addr, &inc->inc6_faddr,
377 sizeof(struct in6_addr));
378 sa6->sin6_port = inc->inc_fport;
379 sa6->sin6_family = AF_INET6;
380 sa6->sin6_len = sizeof(struct sockaddr_in6);
387 * Only take exact matches, any sockets with
388 * previously unbound addresses will be deleted
389 * below in the display routine because they
390 * will appear as ``not seen'' in the kernel
393 TAILQ_FOREACH(p, &netcb, chain) {
394 if (!streq(proto, p->ni_proto))
396 if (p->ni_lsa.ss_family != lsa.ss_family ||
397 memcmp(&p->ni_lsa, &lsa, lsa.ss_len) != 0)
399 if (p->ni_fsa.ss_family == fsa.ss_family &&
400 memcmp(&p->ni_fsa, &fsa, fsa.ss_len) == 0)
404 if ((p = malloc(sizeof(*p))) == NULL) {
405 error("Out of memory");
408 TAILQ_INSERT_HEAD(&netcb, p, chain);
410 memcpy(&p->ni_lsa, &lsa, lsa.ss_len);
411 memcpy(&p->ni_fsa, &fsa, fsa.ss_len);
412 p->ni_proto = strdup(proto);
413 p->ni_flags = NIF_LACHG|NIF_FACHG;
420 /* column locations */
422 #define FADDR LADDR+23
423 #define PROTO FADDR+23
424 #define RCVCC PROTO+6
425 #define SNDCC RCVCC+7
426 #define STATE SNDCC+7
431 if (use_kvm && namelist[X_TCB].n_type == 0)
433 wmove(wnd, 0, 0); wclrtobot(wnd);
434 mvwaddstr(wnd, 0, LADDR, "Local Address");
435 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
436 mvwaddstr(wnd, 0, PROTO, "Proto");
437 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
438 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
439 mvwaddstr(wnd, 0, STATE, "(state)");
445 struct netinfo *p, *q;
447 const char *family = "";
450 * First, delete any connections that have gone
451 * away and adjust the position of connections
452 * below to reflect the deleted line.
454 p = TAILQ_FIRST(&netcb);
456 if (p->ni_line == -1 || p->ni_seen) {
457 p = TAILQ_NEXT(p, chain);
460 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
461 TAILQ_FOREACH(q, &netcb, chain)
462 if (q != p && q->ni_line > p->ni_line) {
464 /* this shouldn't be necessary */
465 q->ni_flags |= NIF_LACHG|NIF_FACHG;
468 q = TAILQ_NEXT(p, chain);
469 TAILQ_REMOVE(&netcb, p, chain);
474 * Update existing connections and add new ones.
476 TAILQ_FOREACH(p, &netcb, chain) {
477 if (p->ni_line == -1) {
479 * Add a new entry if possible.
481 if (lastrow > YMAX(wnd))
483 p->ni_line = lastrow++;
484 p->ni_flags |= NIF_LACHG|NIF_FACHG;
486 if (p->ni_flags & NIF_LACHG) {
487 wmove(wnd, p->ni_line, LADDR);
488 inetprint((struct sockaddr *)&p->ni_lsa, p->ni_proto);
489 p->ni_flags &= ~NIF_LACHG;
491 if (p->ni_flags & NIF_FACHG) {
492 wmove(wnd, p->ni_line, FADDR);
493 inetprint((struct sockaddr *)&p->ni_fsa, p->ni_proto);
494 p->ni_flags &= ~NIF_FACHG;
497 family = (p->ni_lsa.ss_family == AF_INET) ? "4" : "6";
499 snprintf(proto, sizeof(proto), "%s%s", p->ni_proto, family);
500 mvwaddstr(wnd, p->ni_line, PROTO, proto);
501 mvwprintw(wnd, p->ni_line, RCVCC, "%6u", p->ni_rcvcc);
502 mvwprintw(wnd, p->ni_line, SNDCC, "%6u", p->ni_sndcc);
503 if (streq(p->ni_proto, "tcp")) {
504 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
505 mvwprintw(wnd, p->ni_line, STATE, "%d",
508 mvwaddstr(wnd, p->ni_line, STATE,
509 tcpstates[p->ni_state]);
513 if (lastrow < YMAX(wnd)) {
514 wmove(wnd, lastrow, 0); wclrtobot(wnd);
515 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
520 * Pretty print an Internet address (net address + port).
521 * If the nflag was specified, use numbers instead of names.
524 inetprint(struct sockaddr *sa, const char *proto)
526 struct servent *sp = 0;
530 switch (sa->sa_family) {
532 port = ((struct sockaddr_in *)sa)->sin_port;
536 port = ((struct sockaddr_in6 *)sa)->sin6_port;
543 snprintf(line, sizeof(line), "%.*s.", 16, inetname(sa));
544 cp = strchr(line, '\0');
546 sp = getservbyport(port, proto);
548 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
549 sp ? sp->s_name : "*");
551 snprintf(cp, sizeof(line) - (cp - line), "%d",
552 ntohs((u_short)port));
553 /* pad to full column to clear any garbage */
554 cp = strchr(line, '\0');
555 while (cp - line < 22)
562 * Construct an Internet address representation.
563 * If the nflag has been supplied, give
564 * numeric value, otherwise try for symbolic name.
567 inetname(struct sockaddr *sa)
570 static char line[NI_MAXHOST];
575 if (sa->sa_family == AF_INET6) {
576 if (memcmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
577 &in6addr_any, sizeof(in6addr_any)) == 0)
580 getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
581 nflag ? NI_NUMERICHOST : 0);
586 in = ((struct sockaddr_in *)sa)->sin_addr;
587 if (!nflag && in.s_addr != INADDR_ANY) {
588 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
592 if (in.s_addr == INADDR_ANY)
595 snprintf(line, sizeof(line), "%s", cp);
597 in.s_addr = ntohl(in.s_addr);
598 #define C(x) ((x) & 0xff)
599 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
600 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
606 cmdnetstat(const char *cmd, const char *args)
608 if (prefix(cmd, "all")) {
612 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
616 new = prefix(cmd, "numbers");
619 TAILQ_FOREACH(p, &netcb, chain) {
620 if (p->ni_line == -1)
622 p->ni_flags |= NIF_LACHG|NIF_FACHG;
627 if (!netcmd(cmd, args))