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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 1.9 2007/05/31 11:38:36 hasso 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>
54 #include <netinet/ip6.h>
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>
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>
81 static void enter(struct inpcb *, struct xsocket *, int, const char *);
82 static char *inetname(struct in_addr);
83 static void inetprint(struct in_addr *, int, const char *);
85 #define streq(a,b) (strcmp(a,b)==0)
86 #define YMAX(w) ((w)->_maxy-1)
93 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
97 struct netinfo *ni_forw, *ni_prev;
98 short ni_line; /* line on screen */
99 short ni_seen; /* 0 when not present in list */
101 #define NIF_LACHG 0x1 /* local address changed */
102 #define NIF_FACHG 0x2 /* foreign address changed */
103 short ni_state; /* tcp state */
104 const char *ni_proto; /* protocol */
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 */
114 struct netinfo *ni_forw, *ni_prev;
117 static int aflag = 0;
118 static int nflag = 0;
119 static int lastrow = 1;
122 closenetstat(WINDOW *w)
124 register struct netinfo *p;
128 p = (struct netinfo *)netcb.ni_forw;
129 while (p != (struct netinfo *)&netcb) {
130 if (p->ni_line != -1)
145 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
153 struct xtcpcb *xtcp = (struct xtcpcb *)xig;
157 if (xtcp->xt_len < sizeof(*xtcp))
159 xso = &xtcp->xt_socket;
160 state = xtcp->xt_tp.t_state;
161 enter(&xtcp->xt_inp, xso, state, "tcp");
167 struct xinpcb *xinp = (struct xinpcb *)xig;
170 if (xinp->xi_len < sizeof(*xinp))
172 xso = &xinp->xi_socket;
173 enter(&xinp->xi_inp, xso, 0, "udp");
177 fetchnetstat_proto(void (*enter_proto)(void *),
181 size_t i, len, elem_len;
183 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
185 warn("sysctl: %s", mibvar);
188 if ((buf = malloc(len)) == NULL) {
189 warn("malloc %lu bytes", (u_long)len);
192 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
193 warn("sysctl: %s", mibvar);
199 * XXX this is better with a single PCB type
205 if (len < sizeof(size_t)) {
206 warnx("sysctl: short read");
210 elem_len = *(size_t *)buf;
213 for (i = 0; i < len; i++, buf2 += elem_len) {
214 if (*(size_t *)(buf2) != elem_len) {
215 warn("sysctl: inconsistent PCB len");
227 register struct netinfo *p;
229 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
232 fetchnetstat_proto(enter_tcp, "net.inet.tcp.pcblist");
234 fetchnetstat_proto(enter_udp, "net.inet.udp.pcblist");
238 enter(struct inpcb *inp, struct xsocket *so, int state, const char *proto)
240 register struct netinfo *p;
242 if (!aflag && inet_lnaof(inp->inp_laddr) == INADDR_ANY)
244 if (nhosts && !checkhost(inp))
246 if (nports && !checkport(inp))
249 * pcblist may return non-ipv4 sockets, but at the moment
250 * -netstat code doesn't support other than ipv4.
252 if ((inp->inp_vflag & INP_IPV4) == 0)
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
261 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
262 if (!streq(proto, p->ni_proto))
264 if (p->ni_lport != inp->inp_lport ||
265 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
267 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
268 p->ni_fport == inp->inp_fport)
271 if (p == (struct netinfo *)&netcb) {
272 if ((p = malloc(sizeof(*p))) == NULL) {
273 error("Out of memory");
276 p->ni_prev = (struct netinfo *)&netcb;
277 p->ni_forw = netcb.ni_forw;
278 netcb.ni_forw->ni_prev = p;
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;
286 p->ni_flags = NIF_LACHG|NIF_FACHG;
288 p->ni_rcvcc = so->so_rcv.sb_cc;
289 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");
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)");
319 register struct netinfo *p, *q;
322 * First, delete any connections that have gone
323 * away and adjust the position of connections
324 * below to reflect the deleted line.
327 while (p != (struct netinfo *)&netcb) {
328 if (p->ni_line == -1 || p->ni_seen) {
332 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
334 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
335 if (q != p && q->ni_line > p->ni_line) {
337 /* this shouldn't be necessary */
338 q->ni_flags |= NIF_LACHG|NIF_FACHG;
342 p->ni_prev->ni_forw = p->ni_forw;
343 p->ni_forw->ni_prev = p->ni_prev;
348 * Update existing connections and add new ones.
350 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
351 if (p->ni_line == -1) {
353 * Add a new entry if possible.
355 if (lastrow > YMAX(wnd))
357 p->ni_line = lastrow++;
358 p->ni_flags |= NIF_LACHG|NIF_FACHG;
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;
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;
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);
373 if (streq(p->ni_proto, "tcp"))
374 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
375 mvwprintw(wnd, p->ni_line, STATE, "%d",
378 mvwaddstr(wnd, p->ni_line, STATE,
379 tcpstates[p->ni_state]);
382 if (lastrow < YMAX(wnd)) {
383 wmove(wnd, lastrow, 0); wclrtobot(wnd);
384 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
389 * Pretty print an Internet address (net address + port).
390 * If the nflag was specified, use numbers instead of names.
393 inetprint(register struct in_addr *in, int port, const char *proto)
395 struct servent *sp = 0;
398 snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
399 cp = strchr(line, '\0');
401 sp = getservbyport(port, proto);
403 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
404 sp ? sp->s_name : "*");
406 snprintf(cp, sizeof(line) - (cp - line), "%d",
407 ntohs((u_short)port));
408 /* pad to full column to clear any garbage */
409 cp = strchr(line, '\0');
410 while (cp - line < 22)
417 * Construct an Internet address representation.
418 * If the nflag has been supplied, give
419 * numeric value, otherwise try for symbolic name.
422 inetname(struct in_addr in)
425 static char line[50];
429 if (!nflag && in.s_addr != INADDR_ANY) {
430 int net = inet_netof(in);
431 int lna = inet_lnaof(in);
433 if (lna == INADDR_ANY) {
434 np = getnetbyaddr(net, AF_INET);
439 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
444 if (in.s_addr == INADDR_ANY)
447 snprintf(line, sizeof(line), "%s", cp);
449 in.s_addr = ntohl(in.s_addr);
450 #define C(x) ((x) & 0xff)
451 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
452 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
458 cmdnetstat(char *cmd, char *args)
460 register struct netinfo *p;
462 if (prefix(cmd, "all")) {
466 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
469 new = prefix(cmd, "numbers");
473 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
474 if (p->ni_line == -1)
476 p->ni_flags |= NIF_LACHG|NIF_FACHG;
481 if (!netcmd(cmd, args))