2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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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 $
35 * $DragonFly: src/usr.bin/systat/netstat.c,v 1.7 2004/11/13 13:57:36 joerg Exp $
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>
46 #include <sys/sysctl.h>
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>
53 #include <netinet/in_pcb.h>
54 #include <netinet/ip_icmp.h>
55 #include <netinet/icmp_var.h>
56 #include <netinet/ip_var.h>
57 #include <netinet/tcp.h>
58 #include <netinet/tcpip.h>
59 #include <netinet/tcp_seq.h>
61 #include <netinet/tcp_fsm.h>
62 #include <netinet/tcp_timer.h>
63 #include <netinet/tcp_var.h>
64 #include <netinet/tcp_debug.h>
65 #include <netinet/udp.h>
66 #include <netinet/udp_var.h>
78 static void enter(struct inpcb *, struct xsocket *, int, const char *, int);
79 static char *inetname(struct in_addr);
80 static void inetprint(struct in_addr *, int, const char *);
82 #define streq(a,b) (strcmp(a,b)==0)
83 #define YMAX(w) ((w)->_maxy-1)
90 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
94 struct netinfo *ni_forw, *ni_prev;
95 short ni_line; /* line on screen */
96 short ni_seen; /* 0 when not present in list */
98 #define NIF_LACHG 0x1 /* local address changed */
99 #define NIF_FACHG 0x2 /* foreign address changed */
100 short ni_state; /* tcp state */
101 const char *ni_proto; /* protocol */
102 struct in_addr ni_laddr; /* local address */
103 long ni_lport; /* local port */
104 struct in_addr ni_faddr; /* foreign address */
105 long ni_fport; /* foreign port */
106 long ni_rcvcc; /* rcv buffer character count */
107 long ni_sndcc; /* snd buffer character count */
108 int ni_cpuid; /* cpu id */
112 struct netinfo *ni_forw, *ni_prev;
115 static int aflag = 0;
116 static int nflag = 0;
117 static int lastrow = 1;
121 closenetstat(WINDOW *w)
123 register struct netinfo *p;
127 p = (struct netinfo *)netcb.ni_forw;
128 while (p != (struct netinfo *)&netcb) {
129 if (p->ni_line != -1)
148 if (sysctlbyname("hw.ncpu", &ncpu, &len, NULL, 0) == -1) {
149 warn("cannot determine number of CPUs, assuming SMP");
151 } else if (ncpu != 1) {
155 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
161 enter_tcp(struct xinpgen *xig, int cpu)
163 struct xtcpcb *xtcp = (struct xtcpcb *)xig;
167 if (xig->xig_len < sizeof(*xtcp))
169 xso = &xtcp->xt_socket;
170 state = xtcp->xt_tp.t_state;
171 enter(&xtcp->xt_inp, xso, state, "tcp", cpu);
175 enter_udp(struct xinpgen *xig, int cpu)
177 struct xinpcb *xinp = (struct xinpcb *)xig;
180 if (xig->xig_len < sizeof(*xinp))
182 xso = &xinp->xi_socket;
183 enter(&xinp->xi_inp, xso, 0, "udp", cpu);
187 fetchnetstat_proto(void (*enter_proto)(struct xinpgen *, int),
190 struct xinpgen *xig, *oxig, *end;
195 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
197 warn("sysctl: %s", mibvar);
200 if ((buf = malloc(len)) == NULL) {
201 warn("malloc %lu bytes", (u_long)len);
204 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
205 warn("sysctl: %s", mibvar);
209 oxig = (struct xinpgen *)buf;
210 end = (struct xinpgen *)(buf + len);
211 while (oxig + 1 < end && oxig->xig_len > 0) {
212 xig = (struct xinpgen *)((char *)oxig + oxig->xig_len);
213 for (i = 0; i < oxig->xig_count; ++i) {
214 enter_proto(xig, oxig->xig_cpu);
215 xig = (void *)((char *)xig + xig->xig_len);
217 oxig = (struct xinpgen *)((char *)xig + xig->xig_len);
225 register struct netinfo *p;
227 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
230 fetchnetstat_proto(enter_tcp, "net.inet.tcp.pcblist");
232 fetchnetstat_proto(enter_udp, "net.inet.udp.pcblist");
236 enter(struct inpcb *inp, struct xsocket *so, int state, const char *proto,
239 register struct netinfo *p;
241 if (!aflag && inet_lnaof(inp->inp_laddr) == INADDR_ANY)
243 if (nhosts && !checkhost(inp))
245 if (nports && !checkport(inp))
248 * pcblist may return non-ipv4 sockets, but at the moment
249 * -netstat code doesn't support other than ipv4.
251 if ((inp->inp_vflag & INP_IPV4) == 0)
254 * Only take exact matches, any sockets with
255 * previously unbound addresses will be deleted
256 * below in the display routine because they
257 * will appear as ``not seen'' in the kernel
260 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
261 if (!streq(proto, p->ni_proto))
263 if (p->ni_lport != inp->inp_lport ||
264 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
266 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
267 p->ni_fport == inp->inp_fport)
270 if (p == (struct netinfo *)&netcb) {
271 if ((p = malloc(sizeof(*p))) == NULL) {
272 error("Out of memory");
275 p->ni_prev = (struct netinfo *)&netcb;
276 p->ni_forw = netcb.ni_forw;
277 netcb.ni_forw->ni_prev = p;
280 p->ni_laddr = inp->inp_laddr;
281 p->ni_lport = inp->inp_lport;
282 p->ni_faddr = inp->inp_faddr;
283 p->ni_fport = inp->inp_fport;
285 p->ni_flags = NIF_LACHG|NIF_FACHG;
287 p->ni_rcvcc = so->so_rcv.sb_cc;
288 p->ni_sndcc = so->so_snd.sb_cc;
294 /* column locations */
296 #define FADDR LADDR+22
297 #define CPUID FADDR+22
298 #define PROTO CPUID+4
299 #define RCVCC PROTO+6
300 #define SNDCC RCVCC+7
301 #define STATE SNDCC+7
307 wmove(wnd, 0, 0); wclrtobot(wnd);
308 mvwaddstr(wnd, 0, LADDR, "Local Address");
309 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
311 mvwaddstr(wnd, 0, CPUID, "Cpu");
312 mvwaddstr(wnd, 0, PROTO, "Proto");
313 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
314 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
315 mvwaddstr(wnd, 0, STATE, "(state)");
321 register struct netinfo *p, *q;
324 * First, delete any connections that have gone
325 * away and adjust the position of connections
326 * below to reflect the deleted line.
329 while (p != (struct netinfo *)&netcb) {
330 if (p->ni_line == -1 || p->ni_seen) {
334 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
336 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
337 if (q != p && q->ni_line > p->ni_line) {
339 /* this shouldn't be necessary */
340 q->ni_flags |= NIF_LACHG|NIF_FACHG;
344 p->ni_prev->ni_forw = p->ni_forw;
345 p->ni_forw->ni_prev = p->ni_prev;
350 * Update existing connections and add new ones.
352 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
353 if (p->ni_line == -1) {
355 * Add a new entry if possible.
357 if (lastrow > YMAX(wnd))
359 p->ni_line = lastrow++;
360 p->ni_flags |= NIF_LACHG|NIF_FACHG;
362 if (p->ni_flags & NIF_LACHG) {
363 wmove(wnd, p->ni_line, LADDR);
364 inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
365 p->ni_flags &= ~NIF_LACHG;
367 if (p->ni_flags & NIF_FACHG) {
368 wmove(wnd, p->ni_line, FADDR);
369 inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
370 p->ni_flags &= ~NIF_FACHG;
373 mvwprintw(wnd, p->ni_line, CPUID, "%d", p->ni_cpuid);
374 mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
375 mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
376 mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
377 if (streq(p->ni_proto, "tcp"))
378 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
379 mvwprintw(wnd, p->ni_line, STATE, "%d",
382 mvwaddstr(wnd, p->ni_line, STATE,
383 tcpstates[p->ni_state]);
386 if (lastrow < YMAX(wnd)) {
387 wmove(wnd, lastrow, 0); wclrtobot(wnd);
388 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
393 * Pretty print an Internet address (net address + port).
394 * If the nflag was specified, use numbers instead of names.
397 inetprint(register struct in_addr *in, int port, const char *proto)
399 struct servent *sp = 0;
402 snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
403 cp = strchr(line, '\0');
405 sp = getservbyport(port, proto);
407 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
408 sp ? sp->s_name : "*");
410 snprintf(cp, sizeof(line) - (cp - line), "%d",
411 ntohs((u_short)port));
412 /* pad to full column to clear any garbage */
413 cp = strchr(line, '\0');
414 while (cp - line < 22)
421 * Construct an Internet address representation.
422 * If the nflag has been supplied, give
423 * numeric value, otherwise try for symbolic name.
426 inetname(struct in_addr in)
429 static char line[50];
433 if (!nflag && in.s_addr != INADDR_ANY) {
434 int net = inet_netof(in);
435 int lna = inet_lnaof(in);
437 if (lna == INADDR_ANY) {
438 np = getnetbyaddr(net, AF_INET);
443 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
448 if (in.s_addr == INADDR_ANY)
451 snprintf(line, sizeof(line), "%s", cp);
453 in.s_addr = ntohl(in.s_addr);
454 #define C(x) ((x) & 0xff)
455 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
456 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
462 cmdnetstat(char *cmd, char *args)
464 register struct netinfo *p;
466 if (prefix(cmd, "all")) {
470 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
473 new = prefix(cmd, "numbers");
477 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
478 if (p->ni_line == -1)
480 p->ni_flags |= NIF_LACHG|NIF_FACHG;
485 if (!netcmd(cmd, args))