1 /*
2 * Copyright (c) 1983, 1988, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)inet.c 8.5 (Berkeley) 05/24/95";
10 #endif /* not lint */
11
12 #include <sys/param.h>
13 #include <sys/socket.h>
14 #include <sys/socketvar.h>
15 #include <sys/mbuf.h>
16 #include <sys/protosw.h>
17
18 #include <net/route.h>
19 #include <netinet/in.h>
20 #include <netinet/in_systm.h>
21 #include <netinet/ip.h>
22 #include <netinet/in_pcb.h>
23 #include <netinet/ip_icmp.h>
24 #include <netinet/icmp_var.h>
25 #include <netinet/igmp_var.h>
26 #include <netinet/ip_var.h>
27 #include <netinet/tcp.h>
28 #include <netinet/tcpip.h>
29 #include <netinet/tcp_seq.h>
30 #define TCPSTATES
31 #include <netinet/tcp_fsm.h>
32 #include <netinet/tcp_timer.h>
33 #include <netinet/tcp_var.h>
34 #include <netinet/tcp_debug.h>
35 #include <netinet/udp.h>
36 #include <netinet/udp_var.h>
37
38 #include <arpa/inet.h>
39 #include <netdb.h>
40 #include <stdio.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include "netstat.h"
44
45 struct inpcb inpcb;
46 struct tcpcb tcpcb;
47 struct socket sockb;
48
49 char *inetname __P((struct in_addr *));
50 void inetprint __P((struct in_addr *, int, char *));
51
52 /*
53 * Print a summary of connections related to an Internet
54 * protocol. For TCP, also give state of connection.
55 * Listening processes (aflag) are suppressed unless the
56 * -a (all) flag is specified.
57 */
58 void
protopr(off,name)59 protopr(off, name)
60 u_long off;
61 char *name;
62 {
63 struct inpcb cb;
64 register struct inpcb *prev, *next;
65 int istcp;
66 static int first = 1;
67
68 if (off == 0)
69 return;
70 istcp = strcmp(name, "tcp") == 0;
71 kread(off, (char *)&cb, sizeof (struct inpcb));
72 inpcb = cb;
73 prev = (struct inpcb *)off;
74 if (inpcb.inp_next == (struct inpcb *)off)
75 return;
76 while (inpcb.inp_next != (struct inpcb *)off) {
77 next = inpcb.inp_next;
78 kread((u_long)next, (char *)&inpcb, sizeof (inpcb));
79 if (inpcb.inp_prev != prev) {
80 printf("???\n");
81 break;
82 }
83 if (!aflag &&
84 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) {
85 prev = next;
86 continue;
87 }
88 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb));
89 if (istcp) {
90 kread((u_long)inpcb.inp_ppcb,
91 (char *)&tcpcb, sizeof (tcpcb));
92 }
93 if (first) {
94 printf("Active Internet connections");
95 if (aflag)
96 printf(" (including servers)");
97 putchar('\n');
98 if (Aflag)
99 printf("%-8.8s ", "PCB");
100 printf(Aflag ?
101 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" :
102 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n",
103 "Proto", "Recv-Q", "Send-Q",
104 "Local Address", "Foreign Address", "(state)");
105 first = 0;
106 }
107 if (Aflag)
108 if (istcp)
109 printf("%8x ", inpcb.inp_ppcb);
110 else
111 printf("%8x ", next);
112 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc,
113 sockb.so_snd.sb_cc);
114 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name);
115 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name);
116 if (istcp) {
117 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
118 printf(" %d", tcpcb.t_state);
119 else
120 printf(" %s", tcpstates[tcpcb.t_state]);
121 }
122 putchar('\n');
123 prev = next;
124 }
125 }
126
127 /*
128 * Dump TCP statistics structure.
129 */
130 void
tcp_stats(off,name)131 tcp_stats(off, name)
132 u_long off;
133 char *name;
134 {
135 struct tcpstat tcpstat;
136
137 if (off == 0)
138 return;
139 printf ("%s:\n", name);
140 kread(off, (char *)&tcpstat, sizeof (tcpstat));
141
142 #define p(f, m) if (tcpstat.f || sflag <= 1) \
143 printf(m, tcpstat.f, plural(tcpstat.f))
144 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
145 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
146 #define p3(f, m) if (tcpstat.f || sflag <= 1) \
147 printf(m, tcpstat.f, plurales(tcpstat.f))
148
149 p(tcps_sndtotal, "\t%d packet%s sent\n");
150 p2(tcps_sndpack,tcps_sndbyte,
151 "\t\t%d data packet%s (%d byte%s)\n");
152 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
153 "\t\t%d data packet%s (%d byte%s) retransmitted\n");
154 p2(tcps_sndacks, tcps_delack,
155 "\t\t%d ack-only packet%s (%d delayed)\n");
156 p(tcps_sndurg, "\t\t%d URG only packet%s\n");
157 p(tcps_sndprobe, "\t\t%d window probe packet%s\n");
158 p(tcps_sndwinup, "\t\t%d window update packet%s\n");
159 p(tcps_sndctrl, "\t\t%d control packet%s\n");
160 p(tcps_rcvtotal, "\t%d packet%s received\n");
161 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n");
162 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n");
163 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n");
164 p2(tcps_rcvpack, tcps_rcvbyte,
165 "\t\t%d packet%s (%d byte%s) received in-sequence\n");
166 p2(tcps_rcvduppack, tcps_rcvdupbyte,
167 "\t\t%d completely duplicate packet%s (%d byte%s)\n");
168 p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n");
169 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
170 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n");
171 p2(tcps_rcvoopack, tcps_rcvoobyte,
172 "\t\t%d out-of-order packet%s (%d byte%s)\n");
173 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
174 "\t\t%d packet%s (%d byte%s) of data after window\n");
175 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n");
176 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n");
177 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n");
178 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n");
179 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n");
180 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n");
181 p(tcps_connattempt, "\t%d connection request%s\n");
182 p(tcps_accepts, "\t%d connection accept%s\n");
183 p(tcps_badsyn, "\t%d bad connection attempt%s\n");
184 p(tcps_connects, "\t%d connection%s established (including accepts)\n");
185 p2(tcps_closed, tcps_drops,
186 "\t%d connection%s closed (including %d drop%s)\n");
187 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n");
188 p2(tcps_rttupdated, tcps_segstimed,
189 "\t%d segment%s updated rtt (of %d attempt%s)\n");
190 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n");
191 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n");
192 p(tcps_persisttimeo, "\t%d persist timeout%s\n");
193 p(tcps_persistdrop, "\t%d connection%s timed out in persist\n");
194 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n");
195 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n");
196 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n");
197 p(tcps_predack, "\t%d correct ACK header prediction%s\n");
198 p(tcps_preddat, "\t%d correct data packet header prediction%s\n");
199 p3(tcps_pcbcachemiss, "\t%d PCB cache miss%s\n");
200 #undef p
201 #undef p2
202 #undef p3
203 }
204
205 /*
206 * Dump UDP statistics structure.
207 */
208 void
udp_stats(off,name)209 udp_stats(off, name)
210 u_long off;
211 char *name;
212 {
213 struct udpstat udpstat;
214 u_long delivered;
215
216 if (off == 0)
217 return;
218 kread(off, (char *)&udpstat, sizeof (udpstat));
219 printf("%s:\n", name);
220 #define p(f, m) if (udpstat.f || sflag <= 1) \
221 printf(m, udpstat.f, plural(udpstat.f))
222 p(udps_ipackets, "\t%u datagram%s received\n");
223 p(udps_hdrops, "\t%u with incomplete header\n");
224 p(udps_badlen, "\t%u with bad data length field\n");
225 p(udps_badsum, "\t%u with bad checksum\n");
226 p(udps_noport, "\t%u dropped due to no socket\n");
227 p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n");
228 p(udps_fullsock, "\t%u dropped due to full socket buffers\n");
229 delivered = udpstat.udps_ipackets -
230 udpstat.udps_hdrops -
231 udpstat.udps_badlen -
232 udpstat.udps_badsum -
233 udpstat.udps_noport -
234 udpstat.udps_noportbcast -
235 udpstat.udps_fullsock;
236 if (delivered || sflag <= 1)
237 printf("\t%u delivered\n", delivered);
238 p(udps_opackets, "\t%u datagram%s output\n");
239 #undef p
240 }
241
242 /*
243 * Dump IP statistics structure.
244 */
245 void
ip_stats(off,name)246 ip_stats(off, name)
247 u_long off;
248 char *name;
249 {
250 struct ipstat ipstat;
251
252 if (off == 0)
253 return;
254 kread(off, (char *)&ipstat, sizeof (ipstat));
255 printf("%s:\n", name);
256
257 #define p(f, m) if (ipstat.f || sflag <= 1) \
258 printf(m, ipstat.f, plural(ipstat.f))
259
260 p(ips_total, "\t%u total packet%s received\n");
261 p(ips_badsum, "\t%u bad header checksum%s\n");
262 p(ips_toosmall, "\t%u with size smaller than minimum\n");
263 p(ips_tooshort, "\t%u with data size < data length\n");
264 p(ips_badhlen, "\t%u with header length < data size\n");
265 p(ips_badlen, "\t%u with data length < header length\n");
266 p(ips_badoptions, "\t%u with bad options\n");
267 p(ips_badvers, "\t%u with incorrect version number\n");
268 p(ips_fragments, "\t%u fragment%s received\n");
269 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n");
270 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n");
271 p(ips_reassembled, "\t%u packet%s reassembled ok\n");
272 p(ips_delivered, "\t%u packet%s for this host\n");
273 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n");
274 p(ips_forward, "\t%u packet%s forwarded\n");
275 p(ips_cantforward, "\t%u packet%s not forwardable\n");
276 p(ips_redirectsent, "\t%u redirect%s sent\n");
277 p(ips_localout, "\t%u packet%s sent from this host\n");
278 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n");
279 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n");
280 p(ips_noroute, "\t%u output packet%s discarded due to no route\n");
281 p(ips_fragmented, "\t%u output datagram%s fragmented\n");
282 p(ips_ofragments, "\t%u fragment%s created\n");
283 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n");
284 #undef p
285 }
286
287 static char *icmpnames[] = {
288 "echo reply",
289 "#1",
290 "#2",
291 "destination unreachable",
292 "source quench",
293 "routing redirect",
294 "#6",
295 "#7",
296 "echo",
297 "#9",
298 "#10",
299 "time exceeded",
300 "parameter problem",
301 "time stamp",
302 "time stamp reply",
303 "information request",
304 "information request reply",
305 "address mask request",
306 "address mask reply",
307 };
308
309 /*
310 * Dump ICMP statistics.
311 */
312 void
icmp_stats(off,name)313 icmp_stats(off, name)
314 u_long off;
315 char *name;
316 {
317 struct icmpstat icmpstat;
318 register int i, first;
319
320 if (off == 0)
321 return;
322 kread(off, (char *)&icmpstat, sizeof (icmpstat));
323 printf("%s:\n", name);
324
325 #define p(f, m) if (icmpstat.f || sflag <= 1) \
326 printf(m, icmpstat.f, plural(icmpstat.f))
327
328 p(icps_error, "\t%u call%s to icmp_error\n");
329 p(icps_oldicmp,
330 "\t%u error%s not generated 'cuz old message was icmp\n");
331 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
332 if (icmpstat.icps_outhist[i] != 0) {
333 if (first) {
334 printf("\tOutput histogram:\n");
335 first = 0;
336 }
337 printf("\t\t%s: %u\n", icmpnames[i],
338 icmpstat.icps_outhist[i]);
339 }
340 p(icps_badcode, "\t%u message%s with bad code fields\n");
341 p(icps_tooshort, "\t%u message%s < minimum length\n");
342 p(icps_checksum, "\t%u bad checksum%s\n");
343 p(icps_badlen, "\t%u message%s with bad length\n");
344 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
345 if (icmpstat.icps_inhist[i] != 0) {
346 if (first) {
347 printf("\tInput histogram:\n");
348 first = 0;
349 }
350 printf("\t\t%s: %u\n", icmpnames[i],
351 icmpstat.icps_inhist[i]);
352 }
353 p(icps_reflect, "\t%u message response%s generated\n");
354 #undef p
355 }
356
357 /*
358 * Dump IGMP statistics structure.
359 */
360 void
igmp_stats(off,name)361 igmp_stats(off, name)
362 u_long off;
363 char *name;
364 {
365 struct igmpstat igmpstat;
366
367 if (off == 0)
368 return;
369 kread(off, (char *)&igmpstat, sizeof (igmpstat));
370 printf("%s:\n", name);
371
372 #define p(f, m) if (igmpstat.f || sflag <= 1) \
373 printf(m, igmpstat.f, plural(igmpstat.f))
374 #define py(f, m) if (igmpstat.f || sflag <= 1) \
375 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y")
376 p(igps_rcv_total, "\t%u message%s received\n");
377 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n");
378 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n");
379 py(igps_rcv_queries, "\t%u membership quer%s received\n");
380 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n");
381 p(igps_rcv_reports, "\t%u membership report%s received\n");
382 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n");
383 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n");
384 p(igps_snd_reports, "\t%u membership report%s sent\n");
385 #undef p
386 #undef py
387 }
388
389 /*
390 * Pretty print an Internet address (net address + port).
391 * If the nflag was specified, use numbers instead of names.
392 */
393 void
inetprint(in,port,proto)394 inetprint(in, port, proto)
395 register struct in_addr *in;
396 int port;
397 char *proto;
398 {
399 struct servent *sp = 0;
400 char line[80], *cp;
401 int width;
402
403 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in));
404 cp = index(line, '\0');
405 if (!nflag && port)
406 sp = getservbyport((int)port, proto);
407 if (sp || port == 0)
408 sprintf(cp, "%.8s", sp ? sp->s_name : "*");
409 else
410 sprintf(cp, "%d", ntohs((u_short)port));
411 width = Aflag ? 18 : 22;
412 printf(" %-*.*s", width, width, line);
413 }
414
415 /*
416 * Construct an Internet address representation.
417 * If the nflag has been supplied, give
418 * numeric value, otherwise try for symbolic name.
419 */
420 char *
inetname(inp)421 inetname(inp)
422 struct in_addr *inp;
423 {
424 register char *cp;
425 static char line[50];
426 struct hostent *hp;
427 struct netent *np;
428 static char domain[MAXHOSTNAMELEN + 1];
429 static int first = 1;
430
431 if (first && !nflag) {
432 first = 0;
433 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
434 (cp = index(domain, '.')))
435 (void) strcpy(domain, cp + 1);
436 else
437 domain[0] = 0;
438 }
439 cp = 0;
440 if (!nflag && inp->s_addr != INADDR_ANY) {
441 int net = inet_netof(*inp);
442 int lna = inet_lnaof(*inp);
443
444 if (lna == INADDR_ANY) {
445 np = getnetbyaddr(net, AF_INET);
446 if (np)
447 cp = np->n_name;
448 }
449 if (cp == 0) {
450 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
451 if (hp) {
452 if ((cp = index(hp->h_name, '.')) &&
453 !strcmp(cp + 1, domain))
454 *cp = 0;
455 cp = hp->h_name;
456 }
457 }
458 }
459 if (inp->s_addr == INADDR_ANY)
460 strcpy(line, "*");
461 else if (cp)
462 strcpy(line, cp);
463 else {
464 inp->s_addr = ntohl(inp->s_addr);
465 #define C(x) ((x) & 0xff)
466 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24),
467 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr));
468 }
469 return (line);
470 }
471