Annotation of src/usr.bin/netstat/inet.c, Revision 1.4
1.4 ! millert 1: /* $OpenBSD: inet.c,v 1.3 1996/06/26 05:37:21 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: inet.c,v 1.14 1995/10/03 21:42:37 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94";
40: #else
1.4 ! millert 41: static char *rcsid = "$OpenBSD: inet.c,v 1.3 1996/06/26 05:37:21 deraadt Exp $";
1.1 deraadt 42: #endif
43: #endif /* not lint */
44:
45: #include <sys/param.h>
46: #include <sys/queue.h>
47: #include <sys/socket.h>
48: #include <sys/socketvar.h>
49: #include <sys/mbuf.h>
50: #include <sys/protosw.h>
51:
52: #include <net/route.h>
53: #include <netinet/in.h>
54: #include <netinet/in_systm.h>
55: #include <netinet/ip.h>
56: #include <netinet/in_pcb.h>
57: #include <netinet/ip_icmp.h>
58: #include <netinet/icmp_var.h>
59: #include <netinet/igmp_var.h>
60: #include <netinet/ip_var.h>
61: #include <netinet/tcp.h>
62: #include <netinet/tcpip.h>
63: #include <netinet/tcp_seq.h>
64: #define TCPSTATES
65: #include <netinet/tcp_fsm.h>
66: #include <netinet/tcp_timer.h>
67: #include <netinet/tcp_var.h>
68: #include <netinet/tcp_debug.h>
69: #include <netinet/udp.h>
70: #include <netinet/udp_var.h>
71:
72: #include <arpa/inet.h>
73: #include <netdb.h>
74: #include <stdio.h>
75: #include <string.h>
76: #include <unistd.h>
77: #include "netstat.h"
78:
79: struct inpcb inpcb;
80: struct tcpcb tcpcb;
81: struct socket sockb;
82:
83: char *inetname __P((struct in_addr *));
84: void inetprint __P((struct in_addr *, int, char *));
85:
86: /*
87: * Print a summary of connections related to an Internet
88: * protocol. For TCP, also give state of connection.
89: * Listening processes (aflag) are suppressed unless the
90: * -a (all) flag is specified.
91: */
92: void
93: protopr(off, name)
94: u_long off;
95: char *name;
96: {
97: struct inpcbtable table;
98: register struct inpcb *head, *next, *prev;
99: struct inpcb inpcb;
100: int istcp;
101: static int first = 1;
102:
103: if (off == 0)
104: return;
105: istcp = strcmp(name, "tcp") == 0;
106: kread(off, (char *)&table, sizeof table);
107: prev = head =
108: (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first;
109: next = table.inpt_queue.cqh_first;
110:
111: while (next != head) {
112: kread((u_long)next, (char *)&inpcb, sizeof inpcb);
113: if (inpcb.inp_queue.cqe_prev != prev) {
114: printf("???\n");
115: break;
116: }
117: prev = next;
118: next = inpcb.inp_queue.cqe_next;
119:
120: if (!aflag &&
121: inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
122: continue;
123: kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb));
124: if (istcp) {
125: kread((u_long)inpcb.inp_ppcb,
126: (char *)&tcpcb, sizeof (tcpcb));
127: }
128: if (first) {
129: printf("Active Internet connections");
130: if (aflag)
131: printf(" (including servers)");
132: putchar('\n');
133: if (Aflag)
134: printf("%-8.8s ", "PCB");
135: printf(Aflag ?
136: "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" :
137: "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n",
138: "Proto", "Recv-Q", "Send-Q",
139: "Local Address", "Foreign Address", "(state)");
140: first = 0;
141: }
142: if (Aflag)
143: if (istcp)
144: printf("%8x ", inpcb.inp_ppcb);
145: else
146: printf("%8x ", prev);
147: printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc,
148: sockb.so_snd.sb_cc);
149: inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name);
150: inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name);
151: if (istcp) {
152: if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
153: printf(" %d", tcpcb.t_state);
154: else
155: printf(" %s", tcpstates[tcpcb.t_state]);
156: }
157: putchar('\n');
158: }
159: }
160:
161: /*
162: * Dump TCP statistics structure.
163: */
164: void
165: tcp_stats(off, name)
166: u_long off;
167: char *name;
168: {
169: struct tcpstat tcpstat;
170:
171: if (off == 0)
172: return;
173: printf ("%s:\n", name);
174: kread(off, (char *)&tcpstat, sizeof (tcpstat));
175:
176: #define p(f, m) if (tcpstat.f || sflag <= 1) \
177: printf(m, tcpstat.f, plural(tcpstat.f))
178: #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
179: printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
180: #define p3(f, m) if (tcpstat.f || sflag <= 1) \
181: printf(m, tcpstat.f, plurales(tcpstat.f))
182:
183: p(tcps_sndtotal, "\t%d packet%s sent\n");
184: p2(tcps_sndpack,tcps_sndbyte,
185: "\t\t%d data packet%s (%d byte%s)\n");
186: p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
187: "\t\t%d data packet%s (%d byte%s) retransmitted\n");
188: p2(tcps_sndacks, tcps_delack,
189: "\t\t%d ack-only packet%s (%d delayed)\n");
190: p(tcps_sndurg, "\t\t%d URG only packet%s\n");
191: p(tcps_sndprobe, "\t\t%d window probe packet%s\n");
192: p(tcps_sndwinup, "\t\t%d window update packet%s\n");
193: p(tcps_sndctrl, "\t\t%d control packet%s\n");
194: p(tcps_rcvtotal, "\t%d packet%s received\n");
195: p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n");
196: p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n");
197: p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n");
198: p2(tcps_rcvpack, tcps_rcvbyte,
199: "\t\t%d packet%s (%d byte%s) received in-sequence\n");
200: p2(tcps_rcvduppack, tcps_rcvdupbyte,
201: "\t\t%d completely duplicate packet%s (%d byte%s)\n");
202: p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n");
203: p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
204: "\t\t%d packet%s with some dup. data (%d byte%s duped)\n");
205: p2(tcps_rcvoopack, tcps_rcvoobyte,
206: "\t\t%d out-of-order packet%s (%d byte%s)\n");
207: p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
208: "\t\t%d packet%s (%d byte%s) of data after window\n");
209: p(tcps_rcvwinprobe, "\t\t%d window probe%s\n");
210: p(tcps_rcvwinupd, "\t\t%d window update packet%s\n");
211: p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n");
212: p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n");
213: p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n");
214: p(tcps_rcvshort, "\t\t%d discarded because packet too short\n");
215: p(tcps_connattempt, "\t%d connection request%s\n");
216: p(tcps_accepts, "\t%d connection accept%s\n");
217: p(tcps_connects, "\t%d connection%s established (including accepts)\n");
218: p2(tcps_closed, tcps_drops,
219: "\t%d connection%s closed (including %d drop%s)\n");
220: p(tcps_conndrops, "\t%d embryonic connection%s dropped\n");
221: p2(tcps_rttupdated, tcps_segstimed,
222: "\t%d segment%s updated rtt (of %d attempt%s)\n");
223: p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n");
224: p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n");
225: p(tcps_persisttimeo, "\t%d persist timeout%s\n");
226: p(tcps_keeptimeo, "\t%d keepalive timeout%s\n");
227: p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n");
228: p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n");
229: p(tcps_predack, "\t%d correct ACK header prediction%s\n");
230: p(tcps_preddat, "\t%d correct data packet header prediction%s\n");
1.2 mickey 231: p3(tcps_pcbhashmiss, "\t%d PCB cache miss%s\n");
1.1 deraadt 232: #undef p
233: #undef p2
234: #undef p3
235: }
236:
237: /*
238: * Dump UDP statistics structure.
239: */
240: void
241: udp_stats(off, name)
242: u_long off;
243: char *name;
244: {
245: struct udpstat udpstat;
246: u_long delivered;
247:
248: if (off == 0)
249: return;
250: kread(off, (char *)&udpstat, sizeof (udpstat));
251: printf("%s:\n", name);
252: #define p(f, m) if (udpstat.f || sflag <= 1) \
253: printf(m, udpstat.f, plural(udpstat.f))
254: p(udps_ipackets, "\t%u datagram%s received\n");
255: p(udps_hdrops, "\t%u with incomplete header\n");
256: p(udps_badlen, "\t%u with bad data length field\n");
257: p(udps_badsum, "\t%u with bad checksum\n");
258: p(udps_noport, "\t%u dropped due to no socket\n");
259: p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n");
260: p(udps_fullsock, "\t%u dropped due to full socket buffers\n");
261: delivered = udpstat.udps_ipackets -
262: udpstat.udps_hdrops -
263: udpstat.udps_badlen -
264: udpstat.udps_badsum -
265: udpstat.udps_noport -
266: udpstat.udps_noportbcast -
267: udpstat.udps_fullsock;
268: if (delivered || sflag <= 1)
269: printf("\t%u delivered\n", delivered);
270: p(udps_opackets, "\t%u datagram%s output\n");
271: #undef p
272: }
273:
274: /*
275: * Dump IP statistics structure.
276: */
277: void
278: ip_stats(off, name)
279: u_long off;
280: char *name;
281: {
282: struct ipstat ipstat;
283:
284: if (off == 0)
285: return;
286: kread(off, (char *)&ipstat, sizeof (ipstat));
287: printf("%s:\n", name);
288:
289: #define p(f, m) if (ipstat.f || sflag <= 1) \
290: printf(m, ipstat.f, plural(ipstat.f))
291:
292: p(ips_total, "\t%u total packet%s received\n");
293: p(ips_badsum, "\t%u bad header checksum%s\n");
294: p(ips_toosmall, "\t%u with size smaller than minimum\n");
295: p(ips_tooshort, "\t%u with data size < data length\n");
296: p(ips_badhlen, "\t%u with header length < data size\n");
297: p(ips_badlen, "\t%u with data length < header length\n");
298: p(ips_badoptions, "\t%u with bad options\n");
299: p(ips_badvers, "\t%u with incorrect version number\n");
300: p(ips_fragments, "\t%u fragment%s received\n");
301: p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n");
302: p(ips_badfrags, "\t%u malformed fragment%s dropped\n");
303: p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n");
304: p(ips_reassembled, "\t%u packet%s reassembled ok\n");
305: p(ips_delivered, "\t%u packet%s for this host\n");
306: p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n");
307: p(ips_forward, "\t%u packet%s forwarded\n");
308: p(ips_cantforward, "\t%u packet%s not forwardable\n");
309: p(ips_redirectsent, "\t%u redirect%s sent\n");
310: p(ips_localout, "\t%u packet%s sent from this host\n");
311: p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n");
312: p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n");
313: p(ips_noroute, "\t%u output packet%s discarded due to no route\n");
314: p(ips_fragmented, "\t%u output datagram%s fragmented\n");
315: p(ips_ofragments, "\t%u fragment%s created\n");
316: p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n");
317: #undef p
318: }
319:
320: static char *icmpnames[] = {
321: "echo reply",
322: "#1",
323: "#2",
324: "destination unreachable",
325: "source quench",
326: "routing redirect",
327: "#6",
328: "#7",
329: "echo",
330: "#9",
331: "#10",
332: "time exceeded",
333: "parameter problem",
334: "time stamp",
335: "time stamp reply",
336: "information request",
337: "information request reply",
338: "address mask request",
339: "address mask reply",
340: };
341:
342: /*
343: * Dump ICMP statistics.
344: */
345: void
346: icmp_stats(off, name)
347: u_long off;
348: char *name;
349: {
350: struct icmpstat icmpstat;
351: register int i, first;
352:
353: if (off == 0)
354: return;
355: kread(off, (char *)&icmpstat, sizeof (icmpstat));
356: printf("%s:\n", name);
357:
358: #define p(f, m) if (icmpstat.f || sflag <= 1) \
359: printf(m, icmpstat.f, plural(icmpstat.f))
360:
361: p(icps_error, "\t%u call%s to icmp_error\n");
362: p(icps_oldicmp,
363: "\t%u error%s not generated 'cuz old message was icmp\n");
364: for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
365: if (icmpstat.icps_outhist[i] != 0) {
366: if (first) {
367: printf("\tOutput histogram:\n");
368: first = 0;
369: }
370: printf("\t\t%s: %u\n", icmpnames[i],
371: icmpstat.icps_outhist[i]);
372: }
373: p(icps_badcode, "\t%u message%s with bad code fields\n");
374: p(icps_tooshort, "\t%u message%s < minimum length\n");
375: p(icps_checksum, "\t%u bad checksum%s\n");
376: p(icps_badlen, "\t%u message%s with bad length\n");
377: for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
378: if (icmpstat.icps_inhist[i] != 0) {
379: if (first) {
380: printf("\tInput histogram:\n");
381: first = 0;
382: }
383: printf("\t\t%s: %u\n", icmpnames[i],
384: icmpstat.icps_inhist[i]);
385: }
386: p(icps_reflect, "\t%u message response%s generated\n");
387: #undef p
388: }
389:
390: /*
391: * Dump IGMP statistics structure.
392: */
393: void
394: igmp_stats(off, name)
395: u_long off;
396: char *name;
397: {
398: struct igmpstat igmpstat;
399:
400: if (off == 0)
401: return;
402: kread(off, (char *)&igmpstat, sizeof (igmpstat));
403: printf("%s:\n", name);
404:
405: #define p(f, m) if (igmpstat.f || sflag <= 1) \
406: printf(m, igmpstat.f, plural(igmpstat.f))
407: #define py(f, m) if (igmpstat.f || sflag <= 1) \
408: printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y")
409: p(igps_rcv_total, "\t%u message%s received\n");
410: p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n");
411: p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n");
412: py(igps_rcv_queries, "\t%u membership quer%s received\n");
413: py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n");
414: p(igps_rcv_reports, "\t%u membership report%s received\n");
415: p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n");
416: p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n");
417: p(igps_snd_reports, "\t%u membership report%s sent\n");
418: #undef p
419: #undef py
420: }
421:
422: /*
423: * Pretty print an Internet address (net address + port).
424: * If the nflag was specified, use numbers instead of names.
425: */
426: void
427: inetprint(in, port, proto)
428: register struct in_addr *in;
429: int port;
430: char *proto;
431: {
432: struct servent *sp = 0;
433: char line[80], *cp;
434: int width;
435:
436: sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in));
1.4 ! millert 437: cp = strchr(line, '\0');
1.1 deraadt 438: if (!nflag && port)
439: sp = getservbyport((int)port, proto);
440: if (sp || port == 0)
441: sprintf(cp, "%.8s", sp ? sp->s_name : "*");
442: else
443: sprintf(cp, "%d", ntohs((u_short)port));
444: width = Aflag ? 18 : 22;
445: printf(" %-*.*s", width, width, line);
446: }
447:
448: /*
449: * Construct an Internet address representation.
450: * If the nflag has been supplied, give
451: * numeric value, otherwise try for symbolic name.
452: */
453: char *
454: inetname(inp)
455: struct in_addr *inp;
456: {
457: register char *cp;
458: static char line[50];
459: struct hostent *hp;
460: struct netent *np;
461: static char domain[MAXHOSTNAMELEN + 1];
462: static int first = 1;
463:
464: if (first && !nflag) {
465: first = 0;
466: if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
1.4 ! millert 467: (cp = strchr(domain, '.')))
1.1 deraadt 468: (void) strcpy(domain, cp + 1);
469: else
470: domain[0] = 0;
471: }
472: cp = 0;
473: if (!nflag && inp->s_addr != INADDR_ANY) {
474: int net = inet_netof(*inp);
475: int lna = inet_lnaof(*inp);
476:
477: if (lna == INADDR_ANY) {
478: np = getnetbyaddr(net, AF_INET);
479: if (np)
480: cp = np->n_name;
481: }
482: if (cp == 0) {
483: hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
484: if (hp) {
1.4 ! millert 485: if ((cp = strchr(hp->h_name, '.')) &&
1.1 deraadt 486: !strcmp(cp + 1, domain))
487: *cp = 0;
488: cp = hp->h_name;
489: }
490: }
491: }
492: if (inp->s_addr == INADDR_ANY)
493: strcpy(line, "*");
494: else if (cp)
495: strcpy(line, cp);
496: else {
497: inp->s_addr = ntohl(inp->s_addr);
498: #define C(x) ((x) & 0xff)
499: sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24),
500: C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr));
501: }
502: return (line);
503: }
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