1 /*-
2 * Copyright (c) 1983, 1988, 1993
3 * Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 char const copyright[] =
32 "@(#) Copyright (c) 1983, 1988, 1993\n\
33 Regents of the University of California. All rights reserved.\n";
34 #endif /* not lint */
35
36 #if 0
37 #ifndef lint
38 static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94";
39 #endif /* not lint */
40 #endif
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD: stable/9/usr.bin/netstat/main.c 265702 2014-05-08 19:35:29Z melifaro $");
44
45 #include <sys/param.h>
46 #include <sys/file.h>
47 #include <sys/protosw.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50
51 #include <netinet/in.h>
52
53 #ifdef NETGRAPH
54 #include <netgraph/ng_socket.h>
55 #endif
56
57 #include <ctype.h>
58 #include <err.h>
59 #include <errno.h>
60 #include <kvm.h>
61 #include <limits.h>
62 #include <netdb.h>
63 #include <nlist.h>
64 #include <paths.h>
65 #include <stdint.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <unistd.h>
70 #include "netstat.h"
71
72 static struct nlist nl[] = {
73 #define N_IFNET 0
74 { .n_name = "_ifnet" },
75 #define N_RTSTAT 1
76 { .n_name = "_rtstat" },
77 #define N_RTREE 2
78 { .n_name = "_rt_tables"},
79 #define N_MRTSTAT 3
80 { .n_name = "_mrtstat" },
81 #define N_MFCHASHTBL 4
82 { .n_name = "_mfchashtbl" },
83 #define N_VIFTABLE 5
84 { .n_name = "_viftable" },
85 #define N_IPX 6
86 { .n_name = "_ipxpcb_list"},
87 #define N_IPXSTAT 7
88 { .n_name = "_ipxstat"},
89 #define N_SPXSTAT 8
90 { .n_name = "_spx_istat"},
91 #define N_DDPSTAT 9
92 { .n_name = "_ddpstat"},
93 #define N_DDPCB 10
94 { .n_name = "_ddpcb"},
95 #define N_NGSOCKS 11
96 { .n_name = "_ngsocklist"},
97 #define N_IP6STAT 12
98 { .n_name = "_ip6stat" },
99 #define N_ICMP6STAT 13
100 { .n_name = "_icmp6stat" },
101 #define N_IPSECSTAT 14
102 { .n_name = "_ipsec4stat" },
103 #define N_IPSEC6STAT 15
104 { .n_name = "_ipsec6stat" },
105 #define N_PIM6STAT 16
106 { .n_name = "_pim6stat" },
107 #define N_MRT6STAT 17
108 { .n_name = "_mrt6stat" },
109 #define N_MF6CTABLE 18
110 { .n_name = "_mf6ctable" },
111 #define N_MIF6TABLE 19
112 { .n_name = "_mif6table" },
113 #define N_PFKEYSTAT 20
114 { .n_name = "_pfkeystat" },
115 #define N_MBSTAT 21
116 { .n_name = "_mbstat" },
117 #define N_MBTYPES 22
118 { .n_name = "_mbtypes" },
119 #define N_NMBCLUSTERS 23
120 { .n_name = "_nmbclusters" },
121 #define N_NMBUFS 24
122 { .n_name = "_nmbufs" },
123 #define N_MBHI 25
124 { .n_name = "_mbuf_hiwm" },
125 #define N_CLHI 26
126 { .n_name = "_clust_hiwm" },
127 #define N_NCPUS 27
128 { .n_name = "_smp_cpus" },
129 #define N_PAGESZ 28
130 { .n_name = "_pagesize" },
131 #define N_MBPSTAT 29
132 { .n_name = "_mb_statpcpu" },
133 #define N_RTTRASH 30
134 { .n_name = "_rttrash" },
135 #define N_MBLO 31
136 { .n_name = "_mbuf_lowm" },
137 #define N_CLLO 32
138 { .n_name = "_clust_lowm" },
139 #define N_CARPSTAT 33
140 { .n_name = "_carpstats" },
141 #define N_PFSYNCSTAT 34
142 { .n_name = "_pfsyncstats" },
143 #define N_AHSTAT 35
144 { .n_name = "_ahstat" },
145 #define N_ESPSTAT 36
146 { .n_name = "_espstat" },
147 #define N_IPCOMPSTAT 37
148 { .n_name = "_ipcompstat" },
149 #define N_TCPSTAT 38
150 { .n_name = "_tcpstat" },
151 #define N_UDPSTAT 39
152 { .n_name = "_udpstat" },
153 #define N_IPSTAT 40
154 { .n_name = "_ipstat" },
155 #define N_ICMPSTAT 41
156 { .n_name = "_icmpstat" },
157 #define N_IGMPSTAT 42
158 { .n_name = "_igmpstat" },
159 #define N_PIMSTAT 43
160 { .n_name = "_pimstat" },
161 #define N_TCBINFO 44
162 { .n_name = "_tcbinfo" },
163 #define N_UDBINFO 45
164 { .n_name = "_udbinfo" },
165 #define N_DIVCBINFO 46
166 { .n_name = "_divcbinfo" },
167 #define N_RIPCBINFO 47
168 { .n_name = "_ripcbinfo" },
169 #define N_UNP_COUNT 48
170 { .n_name = "_unp_count" },
171 #define N_UNP_GENCNT 49
172 { .n_name = "_unp_gencnt" },
173 #define N_UNP_DHEAD 50
174 { .n_name = "_unp_dhead" },
175 #define N_UNP_SHEAD 51
176 { .n_name = "_unp_shead" },
177 #define N_RIP6STAT 52
178 { .n_name = "_rip6stat" },
179 #define N_SCTPSTAT 53
180 { .n_name = "_sctpstat" },
181 #define N_MFCTABLESIZE 54
182 { .n_name = "_mfctablesize" },
183 #define N_ARPSTAT 55
184 { .n_name = "_arpstat" },
185 #define N_UNP_SPHEAD 56
186 { .n_name = "unp_sphead" },
187 { .n_name = NULL },
188 };
189
190 struct protox {
191 int pr_index; /* index into nlist of cb head */
192 int pr_sindex; /* index into nlist of stat block */
193 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
194 void (*pr_cblocks)(u_long, const char *, int, int);
195 /* control blocks printing routine */
196 void (*pr_stats)(u_long, const char *, int, int);
197 /* statistics printing routine */
198 void (*pr_istats)(char *); /* per/if statistics printing routine */
199 const char *pr_name; /* well-known name */
200 int pr_usesysctl; /* non-zero if we use sysctl, not kvm */
201 int pr_protocol;
202 } protox[] = {
203 { N_TCBINFO, N_TCPSTAT, 1, protopr,
204 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP },
205 { N_UDBINFO, N_UDPSTAT, 1, protopr,
206 udp_stats, NULL, "udp", 1, IPPROTO_UDP },
207 #ifdef SCTP
208 { -1, N_SCTPSTAT, 1, sctp_protopr,
209 sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP },
210 #endif
211 #ifdef SDP
212 { -1, -1, 1, protopr,
213 NULL, NULL, "sdp", 1, IPPROTO_TCP },
214 #endif
215 { N_DIVCBINFO, -1, 1, protopr,
216 NULL, NULL, "divert", 1, IPPROTO_DIVERT },
217 { N_RIPCBINFO, N_IPSTAT, 1, protopr,
218 ip_stats, NULL, "ip", 1, IPPROTO_RAW },
219 { N_RIPCBINFO, N_ICMPSTAT, 1, protopr,
220 icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP },
221 { N_RIPCBINFO, N_IGMPSTAT, 1, protopr,
222 igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP },
223 #ifdef IPSEC
224 { -1, N_IPSECSTAT, 1, NULL, /* keep as compat */
225 ipsec_stats, NULL, "ipsec", 0, 0},
226 { -1, N_AHSTAT, 1, NULL,
227 ah_stats, NULL, "ah", 0, 0},
228 { -1, N_ESPSTAT, 1, NULL,
229 esp_stats, NULL, "esp", 0, 0},
230 { -1, N_IPCOMPSTAT, 1, NULL,
231 ipcomp_stats, NULL, "ipcomp", 0, 0},
232 #endif
233 { N_RIPCBINFO, N_PIMSTAT, 1, protopr,
234 pim_stats, NULL, "pim", 1, IPPROTO_PIM },
235 { -1, N_CARPSTAT, 1, NULL,
236 carp_stats, NULL, "carp", 1, 0 },
237 { -1, N_PFSYNCSTAT, 1, NULL,
238 pfsync_stats, NULL, "pfsync", 1, 0 },
239 { -1, N_ARPSTAT, 1, NULL,
240 arp_stats, NULL, "arp", 1, 0 },
241 { -1, -1, 0, NULL,
242 NULL, NULL, NULL, 0, 0 }
243 };
244
245 #ifdef INET6
246 struct protox ip6protox[] = {
247 { N_TCBINFO, N_TCPSTAT, 1, protopr,
248 tcp_stats, NULL, "tcp", 1, IPPROTO_TCP },
249 { N_UDBINFO, N_UDPSTAT, 1, protopr,
250 udp_stats, NULL, "udp", 1, IPPROTO_UDP },
251 { N_RIPCBINFO, N_IP6STAT, 1, protopr,
252 ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW },
253 { N_RIPCBINFO, N_ICMP6STAT, 1, protopr,
254 icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 },
255 #ifdef SDP
256 { -1, -1, 1, protopr,
257 NULL, NULL, "sdp", 1, IPPROTO_TCP },
258 #endif
259 #ifdef IPSEC
260 { -1, N_IPSEC6STAT, 1, NULL,
261 ipsec_stats, NULL, "ipsec6", 0, 0 },
262 #endif
263 #ifdef notyet
264 { -1, N_PIM6STAT, 1, NULL,
265 pim6_stats, NULL, "pim6", 1, 0 },
266 #endif
267 { -1, N_RIP6STAT, 1, NULL,
268 rip6_stats, NULL, "rip6", 1, 0 },
269 { -1, -1, 0, NULL,
270 NULL, NULL, NULL, 0, 0 }
271 };
272 #endif /*INET6*/
273
274 #ifdef IPSEC
275 struct protox pfkeyprotox[] = {
276 { -1, N_PFKEYSTAT, 1, NULL,
277 pfkey_stats, NULL, "pfkey", 0, 0 },
278 { -1, -1, 0, NULL,
279 NULL, NULL, NULL, 0, 0 }
280 };
281 #endif
282
283 struct protox atalkprotox[] = {
284 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
285 ddp_stats, NULL, "ddp", 0, 0 },
286 { -1, -1, 0, NULL,
287 NULL, NULL, NULL, 0, 0 }
288 };
289 #ifdef NETGRAPH
290 struct protox netgraphprotox[] = {
291 { N_NGSOCKS, -1, 1, netgraphprotopr,
292 NULL, NULL, "ctrl", 0, 0 },
293 { N_NGSOCKS, -1, 1, netgraphprotopr,
294 NULL, NULL, "data", 0, 0 },
295 { -1, -1, 0, NULL,
296 NULL, NULL, NULL, 0, 0 }
297 };
298 #endif
299 #ifdef IPX
300 struct protox ipxprotox[] = {
301 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
302 ipx_stats, NULL, "ipx", 0, 0 },
303 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
304 spx_stats, NULL, "spx", 0, 0 },
305 { -1, -1, 0, NULL,
306 NULL, NULL, 0, 0, 0 }
307 };
308 #endif
309
310 struct protox *protoprotox[] = {
311 protox,
312 #ifdef INET6
313 ip6protox,
314 #endif
315 #ifdef IPSEC
316 pfkeyprotox,
317 #endif
318 #ifdef IPX
319 ipxprotox,
320 #endif
321 atalkprotox, NULL };
322
323 static void printproto(struct protox *, const char *);
324 static void usage(void);
325 static struct protox *name2protox(const char *);
326 static struct protox *knownname(const char *);
327
328 static kvm_t *kvmd;
329 static char *nlistf = NULL, *memf = NULL;
330
331 int Aflag; /* show addresses of protocol control block */
332 int aflag; /* show all sockets (including servers) */
333 int Bflag; /* show information about bpf consumers */
334 int bflag; /* show i/f total bytes in/out */
335 int dflag; /* show i/f dropped packets */
336 int gflag; /* show group (multicast) routing or stats */
337 int hflag; /* show counters in human readable format */
338 int iflag; /* show interfaces */
339 int Lflag; /* show size of listen queues */
340 int mflag; /* show memory stats */
341 int noutputs = 0; /* how much outputs before we exit */
342 int numeric_addr; /* show addresses numerically */
343 int numeric_port; /* show ports numerically */
344 static int pflag; /* show given protocol */
345 int Qflag; /* show netisr information */
346 int rflag; /* show routing tables (or routing stats) */
347 int sflag; /* show protocol statistics */
348 int Wflag; /* wide display */
349 int Tflag; /* TCP Information */
350 int xflag; /* extra information, includes all socket buffer info */
351 int zflag; /* zero stats */
352
353 int interval; /* repeat interval for i/f stats */
354
355 char *interface; /* desired i/f for stats, or NULL for all i/fs */
356 int unit; /* unit number for above */
357
358 int af; /* address family */
359 int live; /* true if we are examining a live system */
360
361 int
main(int argc,char * argv[])362 main(int argc, char *argv[])
363 {
364 struct protox *tp = NULL; /* for printing cblocks & stats */
365 int ch;
366
367 af = AF_UNSPEC;
368
369 while ((ch = getopt(argc, argv, "46AaBbdf:ghI:iLlM:mN:np:Qq:rSTsuWw:xz"))
370 != -1)
371 switch(ch) {
372 case '4':
373 #ifdef INET
374 af = AF_INET;
375 #else
376 errx(1, "IPv4 support is not compiled in");
377 #endif
378 break;
379 case '6':
380 #ifdef INET6
381 af = AF_INET6;
382 #else
383 errx(1, "IPv6 support is not compiled in");
384 #endif
385 break;
386 case 'A':
387 Aflag = 1;
388 break;
389 case 'a':
390 aflag = 1;
391 break;
392 case 'B':
393 Bflag = 1;
394 break;
395 case 'b':
396 bflag = 1;
397 break;
398 case 'd':
399 dflag = 1;
400 break;
401 case 'f':
402 if (strcmp(optarg, "ipx") == 0)
403 af = AF_IPX;
404 else if (strcmp(optarg, "inet") == 0)
405 af = AF_INET;
406 #ifdef INET6
407 else if (strcmp(optarg, "inet6") == 0)
408 af = AF_INET6;
409 #endif
410 #ifdef IPSEC
411 else if (strcmp(optarg, "pfkey") == 0)
412 af = PF_KEY;
413 #endif
414 else if (strcmp(optarg, "unix") == 0)
415 af = AF_UNIX;
416 else if (strcmp(optarg, "atalk") == 0)
417 af = AF_APPLETALK;
418 #ifdef NETGRAPH
419 else if (strcmp(optarg, "ng") == 0
420 || strcmp(optarg, "netgraph") == 0)
421 af = AF_NETGRAPH;
422 #endif
423 else if (strcmp(optarg, "link") == 0)
424 af = AF_LINK;
425 else {
426 errx(1, "%s: unknown address family", optarg);
427 }
428 break;
429 case 'g':
430 gflag = 1;
431 break;
432 case 'h':
433 hflag = 1;
434 break;
435 case 'I': {
436 char *cp;
437
438 iflag = 1;
439 for (cp = interface = optarg; isalpha(*cp); cp++)
440 continue;
441 unit = atoi(cp);
442 break;
443 }
444 case 'i':
445 iflag = 1;
446 break;
447 case 'L':
448 Lflag = 1;
449 break;
450 case 'M':
451 memf = optarg;
452 break;
453 case 'm':
454 mflag = 1;
455 break;
456 case 'N':
457 nlistf = optarg;
458 break;
459 case 'n':
460 numeric_addr = numeric_port = 1;
461 break;
462 case 'p':
463 if ((tp = name2protox(optarg)) == NULL) {
464 errx(1,
465 "%s: unknown or uninstrumented protocol",
466 optarg);
467 }
468 pflag = 1;
469 break;
470 case 'Q':
471 Qflag = 1;
472 break;
473 case 'q':
474 noutputs = atoi(optarg);
475 if (noutputs != 0)
476 noutputs++;
477 break;
478 case 'r':
479 rflag = 1;
480 break;
481 case 's':
482 ++sflag;
483 break;
484 case 'S':
485 numeric_addr = 1;
486 break;
487 case 'u':
488 af = AF_UNIX;
489 break;
490 case 'W':
491 case 'l':
492 Wflag = 1;
493 break;
494 case 'w':
495 interval = atoi(optarg);
496 iflag = 1;
497 break;
498 case 'T':
499 Tflag = 1;
500 break;
501 case 'x':
502 xflag = 1;
503 break;
504 case 'z':
505 zflag = 1;
506 break;
507 case '?':
508 default:
509 usage();
510 }
511 argv += optind;
512 argc -= optind;
513
514 #define BACKWARD_COMPATIBILITY
515 #ifdef BACKWARD_COMPATIBILITY
516 if (*argv) {
517 if (isdigit(**argv)) {
518 interval = atoi(*argv);
519 if (interval <= 0)
520 usage();
521 ++argv;
522 iflag = 1;
523 }
524 if (*argv) {
525 nlistf = *argv;
526 if (*++argv)
527 memf = *argv;
528 }
529 }
530 #endif
531
532 /*
533 * Discard setgid privileges if not the running kernel so that bad
534 * guys can't print interesting stuff from kernel memory.
535 */
536 live = (nlistf == NULL && memf == NULL);
537 if (!live)
538 setgid(getgid());
539
540 if (xflag && Tflag)
541 errx(1, "-x and -T are incompatible, pick one.");
542
543 if (Bflag) {
544 if (!live)
545 usage();
546 bpf_stats(interface);
547 exit(0);
548 }
549 if (mflag) {
550 if (!live) {
551 if (kread(0, NULL, 0) == 0)
552 mbpr(kvmd, nl[N_MBSTAT].n_value);
553 } else
554 mbpr(NULL, 0);
555 exit(0);
556 }
557 if (Qflag) {
558 if (!live) {
559 if (kread(0, NULL, 0) == 0)
560 netisr_stats(kvmd);
561 } else
562 netisr_stats(NULL);
563 exit(0);
564 }
565 #if 0
566 /*
567 * Keep file descriptors open to avoid overhead
568 * of open/close on each call to get* routines.
569 */
570 sethostent(1);
571 setnetent(1);
572 #else
573 /*
574 * This does not make sense any more with DNS being default over
575 * the files. Doing a setXXXXent(1) causes a tcp connection to be
576 * used for the queries, which is slower.
577 */
578 #endif
579 kread(0, NULL, 0);
580 if (iflag && !sflag) {
581 intpr(interval, nl[N_IFNET].n_value, NULL);
582 exit(0);
583 }
584 if (rflag) {
585 if (sflag)
586 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value);
587 else
588 routepr(nl[N_RTREE].n_value);
589 exit(0);
590 }
591 if (gflag) {
592 if (sflag) {
593 if (af == AF_INET || af == AF_UNSPEC)
594 mrt_stats(nl[N_MRTSTAT].n_value);
595 #ifdef INET6
596 if (af == AF_INET6 || af == AF_UNSPEC)
597 mrt6_stats(nl[N_MRT6STAT].n_value);
598 #endif
599 } else {
600 if (af == AF_INET || af == AF_UNSPEC)
601 mroutepr(nl[N_MFCHASHTBL].n_value,
602 nl[N_MFCTABLESIZE].n_value,
603 nl[N_VIFTABLE].n_value);
604 #ifdef INET6
605 if (af == AF_INET6 || af == AF_UNSPEC)
606 mroute6pr(nl[N_MF6CTABLE].n_value,
607 nl[N_MIF6TABLE].n_value);
608 #endif
609 }
610 exit(0);
611 }
612
613 if (tp) {
614 printproto(tp, tp->pr_name);
615 exit(0);
616 }
617 if (af == AF_INET || af == AF_UNSPEC)
618 for (tp = protox; tp->pr_name; tp++)
619 printproto(tp, tp->pr_name);
620 #ifdef INET6
621 if (af == AF_INET6 || af == AF_UNSPEC)
622 for (tp = ip6protox; tp->pr_name; tp++)
623 printproto(tp, tp->pr_name);
624 #endif /*INET6*/
625 #ifdef IPSEC
626 if (af == PF_KEY || af == AF_UNSPEC)
627 for (tp = pfkeyprotox; tp->pr_name; tp++)
628 printproto(tp, tp->pr_name);
629 #endif /*IPSEC*/
630 #ifdef IPX
631 if (af == AF_IPX || af == AF_UNSPEC) {
632 for (tp = ipxprotox; tp->pr_name; tp++)
633 printproto(tp, tp->pr_name);
634 }
635 #endif /* IPX */
636 if (af == AF_APPLETALK || af == AF_UNSPEC)
637 for (tp = atalkprotox; tp->pr_name; tp++)
638 printproto(tp, tp->pr_name);
639 #ifdef NETGRAPH
640 if (af == AF_NETGRAPH || af == AF_UNSPEC)
641 for (tp = netgraphprotox; tp->pr_name; tp++)
642 printproto(tp, tp->pr_name);
643 #endif /* NETGRAPH */
644 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
645 unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value,
646 nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value,
647 nl[N_UNP_SPHEAD].n_value);
648 exit(0);
649 }
650
651 /*
652 * Print out protocol statistics or control blocks (per sflag).
653 * If the interface was not specifically requested, and the symbol
654 * is not in the namelist, ignore this one.
655 */
656 static void
printproto(tp,name)657 printproto(tp, name)
658 struct protox *tp;
659 const char *name;
660 {
661 void (*pr)(u_long, const char *, int, int);
662 u_long off;
663
664 if (sflag) {
665 if (iflag) {
666 if (tp->pr_istats)
667 intpr(interval, nl[N_IFNET].n_value,
668 tp->pr_istats);
669 else if (pflag)
670 printf("%s: no per-interface stats routine\n",
671 tp->pr_name);
672 return;
673 } else {
674 pr = tp->pr_stats;
675 if (!pr) {
676 if (pflag)
677 printf("%s: no stats routine\n",
678 tp->pr_name);
679 return;
680 }
681 if (tp->pr_usesysctl && live)
682 off = 0;
683 else if (tp->pr_sindex < 0) {
684 if (pflag)
685 printf(
686 "%s: stats routine doesn't work on cores\n",
687 tp->pr_name);
688 return;
689 } else
690 off = nl[tp->pr_sindex].n_value;
691 }
692 } else {
693 pr = tp->pr_cblocks;
694 if (!pr) {
695 if (pflag)
696 printf("%s: no PCB routine\n", tp->pr_name);
697 return;
698 }
699 if (tp->pr_usesysctl && live)
700 off = 0;
701 else if (tp->pr_index < 0) {
702 if (pflag)
703 printf(
704 "%s: PCB routine doesn't work on cores\n",
705 tp->pr_name);
706 return;
707 } else
708 off = nl[tp->pr_index].n_value;
709 }
710 if (pr != NULL && (off || (live && tp->pr_usesysctl) ||
711 af != AF_UNSPEC))
712 (*pr)(off, name, af, tp->pr_protocol);
713 }
714
715 /*
716 * Read kernel memory, return 0 on success.
717 */
718 int
kread(u_long addr,void * buf,size_t size)719 kread(u_long addr, void *buf, size_t size)
720 {
721 char errbuf[_POSIX2_LINE_MAX];
722
723 if (kvmd == NULL) {
724 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
725 setgid(getgid());
726 if (kvmd != NULL) {
727 if (kvm_nlist(kvmd, nl) < 0) {
728 if (nlistf)
729 errx(1, "%s: kvm_nlist: %s", nlistf,
730 kvm_geterr(kvmd));
731 else
732 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
733 }
734
735 if (nl[0].n_type == 0) {
736 if (nlistf)
737 errx(1, "%s: no namelist", nlistf);
738 else
739 errx(1, "no namelist");
740 }
741 } else {
742 warnx("kvm not available: %s", errbuf);
743 return(-1);
744 }
745 }
746 if (!buf)
747 return (0);
748 if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) {
749 warnx("%s", kvm_geterr(kvmd));
750 return (-1);
751 }
752 return (0);
753 }
754
755 const char *
plural(uintmax_t n)756 plural(uintmax_t n)
757 {
758 return (n != 1 ? "s" : "");
759 }
760
761 const char *
plurales(uintmax_t n)762 plurales(uintmax_t n)
763 {
764 return (n != 1 ? "es" : "");
765 }
766
767 const char *
pluralies(uintmax_t n)768 pluralies(uintmax_t n)
769 {
770 return (n != 1 ? "ies" : "y");
771 }
772
773 /*
774 * Find the protox for the given "well-known" name.
775 */
776 static struct protox *
knownname(const char * name)777 knownname(const char *name)
778 {
779 struct protox **tpp, *tp;
780
781 for (tpp = protoprotox; *tpp; tpp++)
782 for (tp = *tpp; tp->pr_name; tp++)
783 if (strcmp(tp->pr_name, name) == 0)
784 return (tp);
785 return (NULL);
786 }
787
788 /*
789 * Find the protox corresponding to name.
790 */
791 static struct protox *
name2protox(const char * name)792 name2protox(const char *name)
793 {
794 struct protox *tp;
795 char **alias; /* alias from p->aliases */
796 struct protoent *p;
797
798 /*
799 * Try to find the name in the list of "well-known" names. If that
800 * fails, check if name is an alias for an Internet protocol.
801 */
802 if ((tp = knownname(name)) != NULL)
803 return (tp);
804
805 setprotoent(1); /* make protocol lookup cheaper */
806 while ((p = getprotoent()) != NULL) {
807 /* assert: name not same as p->name */
808 for (alias = p->p_aliases; *alias; alias++)
809 if (strcmp(name, *alias) == 0) {
810 endprotoent();
811 return (knownname(p->p_name));
812 }
813 }
814 endprotoent();
815 return (NULL);
816 }
817
818 static void
usage(void)819 usage(void)
820 {
821 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
822 "usage: netstat [-46AaLnSTWx] [-f protocol_family | -p protocol]\n"
823 " [-M core] [-N system]",
824 " netstat -i | -I interface [-46abdhnW] [-f address_family]\n"
825 " [-M core] [-N system]",
826 " netstat -w wait [-I interface] [-46d] [-M core] [-N system] [-q howmany]",
827 " netstat -s [-s] [-46z] [-f protocol_family | -p protocol]\n"
828 " [-M core] [-N system]",
829 " netstat -i | -I interface [-46s] [-f protocol_family | -p protocol]\n"
830 " [-M core] [-N system]",
831 " netstat -m [-M core] [-N system]",
832 " netstat -B [-I interface]",
833 " netstat -r [-46AanW] [-f address_family] [-M core] [-N system]",
834 " netstat -rs [-s] [-M core] [-N system]",
835 " netstat -g [-46W] [-f address_family] [-M core] [-N system]",
836 " netstat -gs [-46s] [-f address_family] [-M core] [-N system]",
837 " netstat -Q");
838 exit(1);
839 }
840