2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
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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 1.2 2003/06/17 04:29:32 dillon 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>
47 #include <netinet/in.h>
48 #include <arpa/inet.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>
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>
75 static void enter __P((struct inpcb *, struct socket *, int, char *));
76 static char *inetname __P((struct in_addr));
77 static void inetprint __P((struct in_addr *, int, char *));
79 #define streq(a,b) (strcmp(a,b)==0)
80 #define YMAX(w) ((w)->_maxy-1)
87 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
91 struct netinfo *ni_forw, *ni_prev;
92 short ni_line; /* line on screen */
93 short ni_seen; /* 0 when not present in list */
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 */
108 struct netinfo *ni_forw, *ni_prev;
111 static int aflag = 0;
112 static int nflag = 0;
113 static int lastrow = 1;
114 static void enter(), inetprint();
115 static char *inetname();
121 register struct netinfo *p;
125 p = (struct netinfo *)netcb.ni_forw;
126 while (p != (struct netinfo *)&netcb) {
127 if (p->ni_line != -1)
139 static struct nlist namelist[] = {
150 if (kvm_nlist(kd, namelist)) {
154 if (namelist[X_TCB].n_value == 0) {
155 error("No symbols in namelist");
158 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
166 register struct inpcb *next;
167 register struct netinfo *p;
168 struct inpcbhead head;
175 if (namelist[X_TCB].n_value == 0)
177 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
183 else if (protos&UDP) {
188 error("No protocols to display");
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)
197 if (nhosts && !checkhost(&inpcb))
199 if (nports && !checkport(&inpcb))
201 KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
203 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
204 enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
206 enter(&inpcb, &sockb, 0, "udp");
208 if (istcp && (protos&UDP)) {
216 enter(inp, so, state, proto)
217 register struct inpcb *inp;
218 register struct socket *so;
222 register struct netinfo *p;
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
231 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
232 if (!streq(proto, p->ni_proto))
234 if (p->ni_lport != inp->inp_lport ||
235 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
237 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
238 p->ni_fport == inp->inp_fport)
241 if (p == (struct netinfo *)&netcb) {
242 if ((p = malloc(sizeof(*p))) == NULL) {
243 error("Out of memory");
246 p->ni_prev = (struct netinfo *)&netcb;
247 p->ni_forw = netcb.ni_forw;
248 netcb.ni_forw->ni_prev = p;
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;
256 p->ni_flags = NIF_LACHG|NIF_FACHG;
258 p->ni_rcvcc = so->so_rcv.sb_cc;
259 p->ni_sndcc = so->so_snd.sb_cc;
264 /* column locations */
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
276 if (namelist[X_TCB].n_type == 0)
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)");
290 register struct netinfo *p, *q;
293 * First, delete any connections that have gone
294 * away and adjust the position of connections
295 * below to reflect the deleted line.
298 while (p != (struct netinfo *)&netcb) {
299 if (p->ni_line == -1 || p->ni_seen) {
303 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
305 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
306 if (q != p && q->ni_line > p->ni_line) {
308 /* this shouldn't be necessary */
309 q->ni_flags |= NIF_LACHG|NIF_FACHG;
313 p->ni_prev->ni_forw = p->ni_forw;
314 p->ni_forw->ni_prev = p->ni_prev;
319 * Update existing connections and add new ones.
321 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
322 if (p->ni_line == -1) {
324 * Add a new entry if possible.
326 if (lastrow > YMAX(wnd))
328 p->ni_line = lastrow++;
329 p->ni_flags |= NIF_LACHG|NIF_FACHG;
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;
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;
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",
349 mvwaddstr(wnd, p->ni_line, STATE,
350 tcpstates[p->ni_state]);
353 if (lastrow < YMAX(wnd)) {
354 wmove(wnd, lastrow, 0); wclrtobot(wnd);
355 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
360 * Pretty print an Internet address (net address + port).
361 * If the nflag was specified, use numbers instead of names.
364 inetprint(in, port, proto)
365 register struct in_addr *in;
369 struct servent *sp = 0;
370 char line[80], *cp, *index();
372 snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
373 cp = index(line, '\0');
375 sp = getservbyport(port, proto);
377 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
378 sp ? sp->s_name : "*");
380 snprintf(cp, sizeof(line) - (cp - line), "%d",
381 ntohs((u_short)port));
382 /* pad to full column to clear any garbage */
383 cp = index(line, '\0');
384 while (cp - line < 22)
391 * Construct an Internet address representation.
392 * If the nflag has been supplied, give
393 * numeric value, otherwise try for symbolic name.
400 static char line[50];
404 if (!nflag && in.s_addr != INADDR_ANY) {
405 int net = inet_netof(in);
406 int lna = inet_lnaof(in);
408 if (lna == INADDR_ANY) {
409 np = getnetbyaddr(net, AF_INET);
414 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
419 if (in.s_addr == INADDR_ANY)
422 snprintf(line, sizeof(line), "%s", cp);
424 in.s_addr = ntohl(in.s_addr);
425 #define C(x) ((x) & 0xff)
426 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
427 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
433 cmdnetstat(cmd, args)
436 register struct netinfo *p;
438 if (prefix(cmd, "all")) {
442 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
445 new = prefix(cmd, "numbers");
449 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
450 if (p->ni_line == -1)
452 p->ni_flags |= NIF_LACHG|NIF_FACHG;
457 if (!netcmd(cmd, args))