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inet.c revision 1.106
      1 /*	$NetBSD: inet.c,v 1.106 2015/02/08 15:09:45 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "from: @(#)inet.c	8.4 (Berkeley) 4/20/94";
     36 #else
     37 __RCSID("$NetBSD: inet.c,v 1.106 2015/02/08 15:09:45 christos Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #define	_CALLOUT_PRIVATE	/* for defs in sys/callout.h */
     42 
     43 #include <sys/param.h>
     44 #include <sys/queue.h>
     45 #include <sys/socket.h>
     46 #include <sys/socketvar.h>
     47 #include <sys/mbuf.h>
     48 #include <sys/protosw.h>
     49 #include <sys/sysctl.h>
     50 
     51 #include <net/if_arp.h>
     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 #define ICMP_STRINGS
     58 #include <netinet/ip_icmp.h>
     59 
     60 #ifdef INET6
     61 #include <netinet/ip6.h>
     62 #endif
     63 
     64 #include <netinet/icmp_var.h>
     65 #include <netinet/igmp_var.h>
     66 #include <netinet/ip_var.h>
     67 #include <netinet/pim_var.h>
     68 #include <netinet/tcp.h>
     69 #include <netinet/tcpip.h>
     70 #include <netinet/tcp_seq.h>
     71 #define TCPSTATES
     72 #include <netinet/tcp_fsm.h>
     73 #define	TCPTIMERS
     74 #include <netinet/tcp_timer.h>
     75 #include <netinet/tcp_var.h>
     76 #include <netinet/tcp_debug.h>
     77 #include <netinet/udp.h>
     78 #include <netinet/ip_carp.h>
     79 #include <netinet/udp_var.h>
     80 #include <netinet/tcp_vtw.h>
     81 
     82 #include <arpa/inet.h>
     83 #include <kvm.h>
     84 #include <netdb.h>
     85 #include <stdio.h>
     86 #include <string.h>
     87 #include <unistd.h>
     88 #include <stdlib.h>
     89 #include <err.h>
     90 #include <util.h>
     91 #include "netstat.h"
     92 #include "vtw.h"
     93 #include "prog_ops.h"
     94 
     95 char	*inetname(struct in_addr *);
     96 void	inetprint(struct in_addr *, u_int16_t, const char *, int);
     97 
     98 void	print_vtw_v4(const vtw_t *);
     99 
    100 /*
    101  * Print a summary of connections related to an Internet
    102  * protocol.  For TCP, also give state of connection.
    103  * Listening processes (aflag) are suppressed unless the
    104  * -a (all) flag is specified.
    105  */
    106 static int width;
    107 static int compact;
    108 
    109 /* VTW-related variables. */
    110 static struct timeval now;
    111 
    112 static void
    113 protoprhdr(void)
    114 {
    115 	printf("Active Internet connections");
    116 	if (aflag)
    117 		printf(" (including servers)");
    118 	putchar('\n');
    119 	if (Aflag)
    120 		printf("%-8.8s ", "PCB");
    121 	printf(
    122 	    Vflag ? "%-5.5s %-6.6s %-6.6s %s%-*.*s %-*.*s %-13.13s Expires\n"
    123 	          : "%-5.5s %-6.6s %-6.6s %s%-*.*s %-*.*s %s\n",
    124 		"Proto", "Recv-Q", "Send-Q", compact ? "" : " ",
    125 		width, width, "Local Address",
    126 		width, width, "Foreign Address",
    127 		"State");
    128 }
    129 
    130 static void
    131 protopr0(intptr_t ppcb, u_long rcv_sb_cc, u_long snd_sb_cc,
    132 	 struct in_addr *laddr, u_int16_t lport,
    133 	 struct in_addr *faddr, u_int16_t fport,
    134 	 short t_state, const char *name, int inp_flags,
    135 	 const struct timeval *expires)
    136 {
    137 	static const char *shorttcpstates[] = {
    138 		"CLOSED",	"LISTEN",	"SYNSEN",	"SYSRCV",
    139 		"ESTABL",	"CLWAIT",	"FWAIT1",	"CLOSNG",
    140 		"LASTAK",	"FWAIT2",	"TMWAIT",
    141 	};
    142 	int istcp;
    143 
    144 	istcp = strcmp(name, "tcp") == 0;
    145 
    146 	if (Aflag) {
    147 		printf("%8" PRIxPTR " ", ppcb);
    148 	}
    149 	printf("%-5.5s %6ld %6ld%s", name, rcv_sb_cc, snd_sb_cc,
    150 	       compact ? "" : " ");
    151 	if (numeric_port) {
    152 		inetprint(laddr, lport, name, 1);
    153 		inetprint(faddr, fport, name, 1);
    154 	} else if (inp_flags & INP_ANONPORT) {
    155 		inetprint(laddr, lport, name, 1);
    156 		inetprint(faddr, fport, name, 0);
    157 	} else {
    158 		inetprint(laddr, lport, name, 0);
    159 		inetprint(faddr, fport, name, 0);
    160 	}
    161 	if (istcp) {
    162 		if (t_state < 0 || t_state >= TCP_NSTATES)
    163 			printf(" %d", t_state);
    164 		else
    165 			printf(" %s", compact ? shorttcpstates[t_state] :
    166 			       tcpstates[t_state]);
    167 	}
    168 	if (Vflag && expires != NULL) {
    169 		if (expires->tv_sec == 0 && expires->tv_usec == -1)
    170 			printf(" reclaimed");
    171 		else {
    172 			struct timeval delta;
    173 
    174 			timersub(expires, &now, &delta);
    175 			printf(" %.3fms",
    176 			    delta.tv_sec * 1000.0 + delta.tv_usec / 1000.0);
    177 		}
    178 	}
    179 	putchar('\n');
    180 }
    181 
    182 static void
    183 dbg_printf(const char *fmt, ...)
    184 {
    185 	return;
    186 }
    187 
    188 void
    189 print_vtw_v4(const vtw_t *vtw)
    190 {
    191 	const vtw_v4_t *v4 = (const vtw_v4_t *)vtw;
    192 	struct timeval delta;
    193 	struct in_addr la, fa;
    194 	char buf[2][32];
    195 	static const struct timeval zero = {.tv_sec = 0, .tv_usec = 0};
    196 
    197 	la.s_addr = v4->laddr;
    198 	fa.s_addr = v4->faddr;
    199 
    200 	snprintf(&buf[0][0], 32, "%s", inet_ntoa(la));
    201 	snprintf(&buf[1][0], 32, "%s", inet_ntoa(fa));
    202 
    203 	timersub(&vtw->expire, &now, &delta);
    204 
    205 	if (vtw->expire.tv_sec == 0 && vtw->expire.tv_usec == -1) {
    206 		dbg_printf("%15.15s:%d %15.15s:%d reclaimed\n"
    207 		    ,buf[0], ntohs(v4->lport)
    208 		    ,buf[1], ntohs(v4->fport));
    209 		if (!(Vflag && vflag))
    210 			return;
    211 	} else if (vtw->expire.tv_sec == 0)
    212 		return;
    213 	else if (timercmp(&delta, &zero, <) && !(Vflag && vflag)) {
    214 		dbg_printf("%15.15s:%d %15.15s:%d expired\n"
    215 		    ,buf[0], ntohs(v4->lport)
    216 		    ,buf[1], ntohs(v4->fport));
    217 		return;
    218 	} else {
    219 		dbg_printf("%15.15s:%d %15.15s:%d expires in %.3fms\n"
    220 		    ,buf[0], ntohs(v4->lport)
    221 		    ,buf[1], ntohs(v4->fport)
    222 		    ,delta.tv_sec * 1000.0 + delta.tv_usec / 1000.0);
    223 	}
    224 	protopr0(0, 0, 0,
    225 		 &la, v4->lport,
    226 		 &fa, v4->fport,
    227 		 TCPS_TIME_WAIT, "tcp", 0, &vtw->expire);
    228 }
    229 
    230 struct kinfo_pcb *
    231 getpcblist_sysctl(const char *name, size_t *len) {
    232 	int mib[8];
    233 	size_t namelen = 0, size = 0;
    234 	char *mibname = NULL;
    235 	struct kinfo_pcb *pcblist;
    236 
    237 	memset(mib, 0, sizeof(mib));
    238 
    239 	if (asprintf(&mibname, "net.inet%s.%s.pcblist", name + 3, name) == -1)
    240 		err(1, "asprintf");
    241 
    242 	/* get dynamic pcblist node */
    243 	if (sysctlnametomib(mibname, mib, &namelen) == -1)
    244 		err(1, "sysctlnametomib: %s", mibname);
    245 
    246 	free(mibname);
    247 
    248 	if (prog_sysctl(mib, __arraycount(mib), NULL, &size, NULL, 0) == -1)
    249 		err(1, "sysctl (query)");
    250 
    251 	if ((pcblist = malloc(size)) == NULL)
    252 		err(1, "malloc");
    253 	memset(pcblist, 0, size);
    254 
    255 	mib[6] = sizeof(*pcblist);
    256 	mib[7] = size / sizeof(*pcblist);
    257 
    258 	if (prog_sysctl(mib, __arraycount(mib), pcblist, &size, NULL, 0) == -1)
    259 		err(1, "sysctl (copy)");
    260 
    261 	*len = size / sizeof(*pcblist);
    262 	return pcblist;
    263 
    264 }
    265 
    266 static struct kinfo_pcb *
    267 getpcblist_kmem(u_long off, const char *name, size_t *len) {
    268 	struct inpcbtable table;
    269 	struct inpcb_hdr *next, *prev;
    270 	struct inpcb inpcb;
    271 	struct tcpcb tcpcb;
    272 	struct socket sockb;
    273 	int istcp = strcmp(name, "tcp") == 0;
    274 	struct kinfo_pcb *pcblist;
    275 	size_t size = 100, i;
    276 	struct sockaddr_in sin;
    277 	struct inpcbqueue *head;
    278 
    279 	if (off == 0) {
    280 		*len = 0;
    281 		return NULL;
    282 	}
    283 
    284 	kread(off, (char *)&table, sizeof table);
    285 	head = &table.inpt_queue;
    286 	next = TAILQ_FIRST(head);
    287 	prev = TAILQ_END(head);
    288 
    289 	if ((pcblist = malloc(size * sizeof(*pcblist))) == NULL)
    290 		err(1, "malloc");
    291 
    292 	i = 0;
    293 	while (next != TAILQ_END(head)) {
    294 		kread((u_long)next, (char *)&inpcb, sizeof inpcb);
    295 		prev = next;
    296 		next = TAILQ_NEXT(&inpcb, inp_queue);
    297 
    298 		if (inpcb.inp_af != AF_INET)
    299 			continue;
    300 
    301 		kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof(sockb));
    302 		if (istcp) {
    303 			kread((u_long)inpcb.inp_ppcb,
    304 			    (char *)&tcpcb, sizeof (tcpcb));
    305 		}
    306 		pcblist[i].ki_ppcbaddr =
    307 		    istcp ? (uintptr_t) inpcb.inp_ppcb : (uintptr_t) prev;
    308 		pcblist[i].ki_rcvq = (uint64_t)sockb.so_rcv.sb_cc;
    309 		pcblist[i].ki_sndq = (uint64_t)sockb.so_snd.sb_cc;
    310 
    311 		sin.sin_addr = inpcb.inp_laddr;
    312 		sin.sin_port = inpcb.inp_lport;
    313 		memcpy(&pcblist[i].ki_s, &sin, sizeof(sin));
    314 		sin.sin_addr = inpcb.inp_faddr;
    315 		sin.sin_port = inpcb.inp_fport;
    316 		memcpy(&pcblist[i].ki_d, &sin, sizeof(sin));
    317 		pcblist[i].ki_tstate = tcpcb.t_state;
    318 		pcblist[i].ki_pflags = inpcb.inp_flags;
    319 		if (i++ == size) {
    320 			size += 100;
    321 			struct kinfo_pcb *n = realloc(pcblist,
    322 			    size * sizeof(*pcblist));
    323 			if (n == NULL)
    324 				err(1, "realloc");
    325 			pcblist = n;
    326 		}
    327 	}
    328 	*len = i;
    329 	return pcblist;
    330 }
    331 
    332 void
    333 protopr(u_long off, const char *name)
    334 {
    335 	static int first = 1;
    336 	struct kinfo_pcb *pcblist;
    337 	size_t i, len;
    338 
    339 	compact = 0;
    340 	if (Aflag) {
    341 		if (!numeric_addr)
    342 			width = 18;
    343 		else {
    344 			width = 21;
    345 			compact = 1;
    346 		}
    347 	} else
    348 		width = 22;
    349 
    350 	if (use_sysctl)
    351 		pcblist = getpcblist_sysctl(name, &len);
    352 	else
    353 		pcblist = getpcblist_kmem(off, name, &len);
    354 
    355 	for (i = 0; i < len; i++) {
    356 		struct sockaddr_in src, dst;
    357 
    358 		memcpy(&src, &pcblist[i].ki_s, sizeof(src));
    359 		memcpy(&dst, &pcblist[i].ki_d, sizeof(dst));
    360 
    361 		if (!aflag &&
    362 		    inet_lnaof(dst.sin_addr) == INADDR_ANY)
    363 			continue;
    364 
    365 		if (first) {
    366 			protoprhdr();
    367 			first = 0;
    368 		}
    369 		protopr0((intptr_t) pcblist[i].ki_ppcbaddr,
    370 			 pcblist[i].ki_rcvq, pcblist[i].ki_sndq,
    371 			 &src.sin_addr, src.sin_port,
    372 			 &dst.sin_addr, dst.sin_port,
    373 			 pcblist[i].ki_tstate, name,
    374 			 pcblist[i].ki_pflags, NULL);
    375 	}
    376 
    377 	free(pcblist);
    378 
    379 	if (strcmp(name, "tcp") == 0) {
    380 		struct timeval t;
    381 		timebase(&t);
    382 		gettimeofday(&now, NULL);
    383 		timersub(&now, &t, &now);
    384 		show_vtw_v4(print_vtw_v4);
    385 	}
    386 }
    387 
    388 /*
    389  * Dump TCP statistics structure.
    390  */
    391 void
    392 tcp_stats(u_long off, const char *name)
    393 {
    394 	uint64_t tcpstat[TCP_NSTATS];
    395 
    396 	if (use_sysctl) {
    397 		size_t size = sizeof(tcpstat);
    398 
    399 		if (sysctlbyname("net.inet.tcp.stats", tcpstat, &size,
    400 				 NULL, 0) == -1)
    401 			return;
    402 	} else {
    403 		warnx("%s stats not available via KVM.", name);
    404 		return;
    405 	}
    406 
    407 	printf ("%s:\n", name);
    408 
    409 #define	ps(f, m) if (tcpstat[f] || sflag <= 1) \
    410     printf(m, tcpstat[f])
    411 #define	p(f, m) if (tcpstat[f] || sflag <= 1) \
    412     printf(m, tcpstat[f], plural(tcpstat[f]))
    413 #define	p2(f1, f2, m) if (tcpstat[f1] || tcpstat[f2] || sflag <= 1) \
    414     printf(m, tcpstat[f1], plural(tcpstat[f1]), \
    415     tcpstat[f2], plural(tcpstat[f2]))
    416 #define	p2s(f1, f2, m) if (tcpstat[f1] || tcpstat[f2] || sflag <= 1) \
    417     printf(m, tcpstat[f1], plural(tcpstat[f1]), \
    418     tcpstat[f2])
    419 #define	p3(f, m) if (tcpstat[f] || sflag <= 1) \
    420     printf(m, tcpstat[f], plurales(tcpstat[f]))
    421 
    422 	p(TCP_STAT_SNDTOTAL, "\t%" PRIu64 " packet%s sent\n");
    423 	p2(TCP_STAT_SNDPACK,TCP_STAT_SNDBYTE,
    424 		"\t\t%" PRIu64 " data packet%s (%" PRIu64 " byte%s)\n");
    425 	p2(TCP_STAT_SNDREXMITPACK, TCP_STAT_SNDREXMITBYTE,
    426 		"\t\t%" PRIu64 " data packet%s (%" PRIu64 " byte%s) retransmitted\n");
    427 	p2s(TCP_STAT_SNDACKS, TCP_STAT_DELACK,
    428 		"\t\t%" PRIu64 " ack-only packet%s (%" PRIu64 " delayed)\n");
    429 	p(TCP_STAT_SNDURG, "\t\t%" PRIu64 " URG only packet%s\n");
    430 	p(TCP_STAT_SNDPROBE, "\t\t%" PRIu64 " window probe packet%s\n");
    431 	p(TCP_STAT_SNDWINUP, "\t\t%" PRIu64 " window update packet%s\n");
    432 	p(TCP_STAT_SNDCTRL, "\t\t%" PRIu64 " control packet%s\n");
    433 	p(TCP_STAT_SELFQUENCH,
    434 	    "\t\t%" PRIu64 " send attempt%s resulted in self-quench\n");
    435 	p(TCP_STAT_RCVTOTAL, "\t%" PRIu64 " packet%s received\n");
    436 	p2(TCP_STAT_RCVACKPACK, TCP_STAT_RCVACKBYTE,
    437 		"\t\t%" PRIu64 " ack%s (for %" PRIu64 " byte%s)\n");
    438 	p(TCP_STAT_RCVDUPACK, "\t\t%" PRIu64 " duplicate ack%s\n");
    439 	p(TCP_STAT_RCVACKTOOMUCH, "\t\t%" PRIu64 " ack%s for unsent data\n");
    440 	p2(TCP_STAT_RCVPACK, TCP_STAT_RCVBYTE,
    441 		"\t\t%" PRIu64 " packet%s (%" PRIu64 " byte%s) received in-sequence\n");
    442 	p2(TCP_STAT_RCVDUPPACK, TCP_STAT_RCVDUPBYTE,
    443 		"\t\t%" PRIu64 " completely duplicate packet%s (%" PRIu64 " byte%s)\n");
    444 	p(TCP_STAT_PAWSDROP, "\t\t%" PRIu64 " old duplicate packet%s\n");
    445 	p2(TCP_STAT_RCVPARTDUPPACK, TCP_STAT_RCVPARTDUPBYTE,
    446 		"\t\t%" PRIu64 " packet%s with some dup. data (%" PRIu64 " byte%s duped)\n");
    447 	p2(TCP_STAT_RCVOOPACK, TCP_STAT_RCVOOBYTE,
    448 		"\t\t%" PRIu64 " out-of-order packet%s (%" PRIu64 " byte%s)\n");
    449 	p2(TCP_STAT_RCVPACKAFTERWIN, TCP_STAT_RCVBYTEAFTERWIN,
    450 		"\t\t%" PRIu64 " packet%s (%" PRIu64 " byte%s) of data after window\n");
    451 	p(TCP_STAT_RCVWINPROBE, "\t\t%" PRIu64 " window probe%s\n");
    452 	p(TCP_STAT_RCVWINUPD, "\t\t%" PRIu64 " window update packet%s\n");
    453 	p(TCP_STAT_RCVAFTERCLOSE, "\t\t%" PRIu64 " packet%s received after close\n");
    454 	p(TCP_STAT_RCVBADSUM, "\t\t%" PRIu64 " discarded for bad checksum%s\n");
    455 	p(TCP_STAT_RCVBADOFF, "\t\t%" PRIu64 " discarded for bad header offset field%s\n");
    456 	ps(TCP_STAT_RCVSHORT, "\t\t%" PRIu64 " discarded because packet too short\n");
    457 	p(TCP_STAT_CONNATTEMPT, "\t%" PRIu64 " connection request%s\n");
    458 	p(TCP_STAT_ACCEPTS, "\t%" PRIu64 " connection accept%s\n");
    459 	p(TCP_STAT_CONNECTS,
    460 		"\t%" PRIu64 " connection%s established (including accepts)\n");
    461 	p2(TCP_STAT_CLOSED, TCP_STAT_DROPS,
    462 		"\t%" PRIu64 " connection%s closed (including %" PRIu64 " drop%s)\n");
    463 	p(TCP_STAT_CONNDROPS, "\t%" PRIu64 " embryonic connection%s dropped\n");
    464 	p(TCP_STAT_DELAYED_FREE, "\t%" PRIu64 " delayed free%s of tcpcb\n");
    465 	p2(TCP_STAT_RTTUPDATED, TCP_STAT_SEGSTIMED,
    466 		"\t%" PRIu64 " segment%s updated rtt (of %" PRIu64 " attempt%s)\n");
    467 	p(TCP_STAT_REXMTTIMEO, "\t%" PRIu64 " retransmit timeout%s\n");
    468 	p(TCP_STAT_TIMEOUTDROP,
    469 		"\t\t%" PRIu64 " connection%s dropped by rexmit timeout\n");
    470 	p2(TCP_STAT_PERSISTTIMEO, TCP_STAT_PERSISTDROPS,
    471 	   "\t%" PRIu64 " persist timeout%s (resulting in %" PRIu64 " dropped "
    472 		"connection%s)\n");
    473 	p(TCP_STAT_KEEPTIMEO, "\t%" PRIu64 " keepalive timeout%s\n");
    474 	p(TCP_STAT_KEEPPROBE, "\t\t%" PRIu64 " keepalive probe%s sent\n");
    475 	p(TCP_STAT_KEEPDROPS, "\t\t%" PRIu64 " connection%s dropped by keepalive\n");
    476 	p(TCP_STAT_PREDACK, "\t%" PRIu64 " correct ACK header prediction%s\n");
    477 	p(TCP_STAT_PREDDAT, "\t%" PRIu64 " correct data packet header prediction%s\n");
    478 	p3(TCP_STAT_PCBHASHMISS, "\t%" PRIu64 " PCB hash miss%s\n");
    479 	ps(TCP_STAT_NOPORT, "\t%" PRIu64 " dropped due to no socket\n");
    480 	p(TCP_STAT_CONNSDRAINED, "\t%" PRIu64 " connection%s drained due to memory "
    481 		"shortage\n");
    482 	p(TCP_STAT_PMTUBLACKHOLE, "\t%" PRIu64 " PMTUD blackhole%s detected\n");
    483 
    484 	p(TCP_STAT_BADSYN, "\t%" PRIu64 " bad connection attempt%s\n");
    485 	ps(TCP_STAT_SC_ADDED, "\t%" PRIu64 " SYN cache entries added\n");
    486 	p(TCP_STAT_SC_COLLISIONS, "\t\t%" PRIu64 " hash collision%s\n");
    487 	ps(TCP_STAT_SC_COMPLETED, "\t\t%" PRIu64 " completed\n");
    488 	ps(TCP_STAT_SC_ABORTED, "\t\t%" PRIu64 " aborted (no space to build PCB)\n");
    489 	ps(TCP_STAT_SC_TIMED_OUT, "\t\t%" PRIu64 " timed out\n");
    490 	ps(TCP_STAT_SC_OVERFLOWED, "\t\t%" PRIu64 " dropped due to overflow\n");
    491 	ps(TCP_STAT_SC_BUCKETOVERFLOW, "\t\t%" PRIu64 " dropped due to bucket overflow\n");
    492 	ps(TCP_STAT_SC_RESET, "\t\t%" PRIu64 " dropped due to RST\n");
    493 	ps(TCP_STAT_SC_UNREACH, "\t\t%" PRIu64 " dropped due to ICMP unreachable\n");
    494 	ps(TCP_STAT_SC_DELAYED_FREE, "\t\t%" PRIu64 " delayed free of SYN cache "
    495 		"entries\n");
    496 	p(TCP_STAT_SC_RETRANSMITTED, "\t%" PRIu64 " SYN,ACK%s retransmitted\n");
    497 	p(TCP_STAT_SC_DUPESYN, "\t%" PRIu64 " duplicate SYN%s received for entries "
    498 		"already in the cache\n");
    499 	p(TCP_STAT_SC_DROPPED, "\t%" PRIu64 " SYN%s dropped (no route or no space)\n");
    500 	p(TCP_STAT_BADSIG, "\t%" PRIu64 " packet%s with bad signature\n");
    501 	p(TCP_STAT_GOODSIG, "\t%" PRIu64 " packet%s with good signature\n");
    502 
    503 	p(TCP_STAT_ECN_SHS, "\t%" PRIu64 " successful ECN handshake%s\n");
    504 	p(TCP_STAT_ECN_CE, "\t%" PRIu64 " packet%s with ECN CE bit\n");
    505 	p(TCP_STAT_ECN_ECT, "\t%" PRIu64 " packet%s ECN ECT(0) bit\n");
    506 #undef p
    507 #undef ps
    508 #undef p2
    509 #undef p2s
    510 #undef p3
    511 	show_vtw_stats();
    512 }
    513 
    514 /*
    515  * Dump UDP statistics structure.
    516  */
    517 void
    518 udp_stats(u_long off, const char *name)
    519 {
    520 	uint64_t udpstat[UDP_NSTATS];
    521 	u_quad_t delivered;
    522 
    523 	if (use_sysctl) {
    524 		size_t size = sizeof(udpstat);
    525 
    526 		if (sysctlbyname("net.inet.udp.stats", udpstat, &size,
    527 				 NULL, 0) == -1)
    528 			return;
    529 	} else {
    530 		warnx("%s stats not available via KVM.", name);
    531 		return;
    532 	}
    533 
    534 	printf ("%s:\n", name);
    535 
    536 #define	ps(f, m) if (udpstat[f] || sflag <= 1) \
    537     printf(m, udpstat[f])
    538 #define	p(f, m) if (udpstat[f] || sflag <= 1) \
    539     printf(m, udpstat[f], plural(udpstat[f]))
    540 #define	p3(f, m) if (udpstat[f] || sflag <= 1) \
    541     printf(m, udpstat[f], plurales(udpstat[f]))
    542 
    543 	p(UDP_STAT_IPACKETS, "\t%" PRIu64 " datagram%s received\n");
    544 	ps(UDP_STAT_HDROPS, "\t%" PRIu64 " with incomplete header\n");
    545 	ps(UDP_STAT_BADLEN, "\t%" PRIu64 " with bad data length field\n");
    546 	ps(UDP_STAT_BADSUM, "\t%" PRIu64 " with bad checksum\n");
    547 	ps(UDP_STAT_NOPORT, "\t%" PRIu64 " dropped due to no socket\n");
    548 	p(UDP_STAT_NOPORTBCAST,
    549 	  "\t%" PRIu64 " broadcast/multicast datagram%s dropped due to no socket\n");
    550 	ps(UDP_STAT_FULLSOCK, "\t%" PRIu64 " dropped due to full socket buffers\n");
    551 	delivered = udpstat[UDP_STAT_IPACKETS] -
    552 		    udpstat[UDP_STAT_HDROPS] -
    553 		    udpstat[UDP_STAT_BADLEN] -
    554 		    udpstat[UDP_STAT_BADSUM] -
    555 		    udpstat[UDP_STAT_NOPORT] -
    556 		    udpstat[UDP_STAT_NOPORTBCAST] -
    557 		    udpstat[UDP_STAT_FULLSOCK];
    558 	if (delivered || sflag <= 1)
    559 		printf("\t%" PRIu64 " delivered\n", delivered);
    560 	p3(UDP_STAT_PCBHASHMISS, "\t%" PRIu64 " PCB hash miss%s\n");
    561 	p(UDP_STAT_OPACKETS, "\t%" PRIu64 " datagram%s output\n");
    562 
    563 #undef ps
    564 #undef p
    565 #undef p3
    566 }
    567 
    568 /*
    569  * Dump IP statistics structure.
    570  */
    571 void
    572 ip_stats(u_long off, const char *name)
    573 {
    574 	uint64_t ipstat[IP_NSTATS];
    575 
    576 	if (use_sysctl) {
    577 		size_t size = sizeof(ipstat);
    578 
    579 		if (sysctlbyname("net.inet.ip.stats", ipstat, &size,
    580 				 NULL, 0) == -1)
    581 			return;
    582 	} else {
    583 		warnx("%s stats not available via KVM.", name);
    584 		return;
    585 	}
    586 
    587 	printf("%s:\n", name);
    588 
    589 #define	ps(f, m) if (ipstat[f] || sflag <= 1) \
    590     printf(m, ipstat[f])
    591 #define	p(f, m) if (ipstat[f] || sflag <= 1) \
    592     printf(m, ipstat[f], plural(ipstat[f]))
    593 
    594 	p(IP_STAT_TOTAL, "\t%" PRIu64 " total packet%s received\n");
    595 	p(IP_STAT_BADSUM, "\t%" PRIu64 " bad header checksum%s\n");
    596 	ps(IP_STAT_TOOSMALL, "\t%" PRIu64 " with size smaller than minimum\n");
    597 	ps(IP_STAT_TOOSHORT, "\t%" PRIu64 " with data size < data length\n");
    598 	ps(IP_STAT_TOOLONG, "\t%" PRIu64 " with length > max ip packet size\n");
    599 	ps(IP_STAT_BADHLEN, "\t%" PRIu64 " with header length < data size\n");
    600 	ps(IP_STAT_BADLEN, "\t%" PRIu64 " with data length < header length\n");
    601 	ps(IP_STAT_BADOPTIONS, "\t%" PRIu64 " with bad options\n");
    602 	ps(IP_STAT_BADVERS, "\t%" PRIu64 " with incorrect version number\n");
    603 	p(IP_STAT_FRAGMENTS, "\t%" PRIu64 " fragment%s received\n");
    604 	p(IP_STAT_FRAGDROPPED, "\t%" PRIu64 " fragment%s dropped (dup or out of space)\n");
    605 	p(IP_STAT_RCVMEMDROP, "\t%" PRIu64 " fragment%s dropped (out of ipqent)\n");
    606 	p(IP_STAT_BADFRAGS, "\t%" PRIu64 " malformed fragment%s dropped\n");
    607 	p(IP_STAT_FRAGTIMEOUT, "\t%" PRIu64 " fragment%s dropped after timeout\n");
    608 	p(IP_STAT_REASSEMBLED, "\t%" PRIu64 " packet%s reassembled ok\n");
    609 	p(IP_STAT_DELIVERED, "\t%" PRIu64 " packet%s for this host\n");
    610 	p(IP_STAT_NOPROTO, "\t%" PRIu64 " packet%s for unknown/unsupported protocol\n");
    611 	p(IP_STAT_FORWARD, "\t%" PRIu64 " packet%s forwarded");
    612 	p(IP_STAT_FASTFORWARD, " (%" PRIu64 " packet%s fast forwarded)");
    613 	if (ipstat[IP_STAT_FORWARD] || sflag <= 1)
    614 		putchar('\n');
    615 	p(IP_STAT_CANTFORWARD, "\t%" PRIu64 " packet%s not forwardable\n");
    616 	p(IP_STAT_REDIRECTSENT, "\t%" PRIu64 " redirect%s sent\n");
    617 	p(IP_STAT_NOGIF, "\t%" PRIu64 " packet%s no matching gif found\n");
    618 	p(IP_STAT_LOCALOUT, "\t%" PRIu64 " packet%s sent from this host\n");
    619 	p(IP_STAT_RAWOUT, "\t%" PRIu64 " packet%s sent with fabricated ip header\n");
    620 	p(IP_STAT_ODROPPED, "\t%" PRIu64 " output packet%s dropped due to no bufs, etc.\n");
    621 	p(IP_STAT_NOROUTE, "\t%" PRIu64 " output packet%s discarded due to no route\n");
    622 	p(IP_STAT_FRAGMENTED, "\t%" PRIu64 " output datagram%s fragmented\n");
    623 	p(IP_STAT_OFRAGMENTS, "\t%" PRIu64 " fragment%s created\n");
    624 	p(IP_STAT_CANTFRAG, "\t%" PRIu64 " datagram%s that can't be fragmented\n");
    625 	p(IP_STAT_BADADDR, "\t%" PRIu64 " datagram%s with bad address in header\n");
    626 #undef ps
    627 #undef p
    628 }
    629 
    630 /*
    631  * Dump ICMP statistics.
    632  */
    633 void
    634 icmp_stats(u_long off, const char *name)
    635 {
    636 	uint64_t icmpstat[ICMP_NSTATS];
    637 	int i, first;
    638 
    639 	if (use_sysctl) {
    640 		size_t size = sizeof(icmpstat);
    641 
    642 		if (sysctlbyname("net.inet.icmp.stats", icmpstat, &size,
    643 				 NULL, 0) == -1)
    644 			return;
    645 	} else {
    646 		warnx("%s stats not available via KVM.", name);
    647 		return;
    648 	}
    649 
    650 	printf("%s:\n", name);
    651 
    652 #define	p(f, m) if (icmpstat[f] || sflag <= 1) \
    653     printf(m, icmpstat[f], plural(icmpstat[f]))
    654 
    655 	p(ICMP_STAT_ERROR, "\t%" PRIu64 " call%s to icmp_error\n");
    656 	p(ICMP_STAT_OLDICMP,
    657 	    "\t%" PRIu64 " error%s not generated because old message was icmp\n");
    658 	for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
    659 		if (icmpstat[ICMP_STAT_OUTHIST + i] != 0) {
    660 			if (first) {
    661 				printf("\tOutput histogram:\n");
    662 				first = 0;
    663 			}
    664 			printf("\t\t%s: %" PRIu64 "\n", icmp_type[i],
    665 			   icmpstat[ICMP_STAT_OUTHIST + i]);
    666 		}
    667 	p(ICMP_STAT_BADCODE, "\t%" PRIu64 " message%s with bad code fields\n");
    668 	p(ICMP_STAT_TOOSHORT, "\t%" PRIu64 " message%s < minimum length\n");
    669 	p(ICMP_STAT_CHECKSUM, "\t%" PRIu64 " bad checksum%s\n");
    670 	p(ICMP_STAT_BADLEN, "\t%" PRIu64 " message%s with bad length\n");
    671 	p(ICMP_STAT_BMCASTECHO, "\t%" PRIu64 " multicast echo request%s ignored\n");
    672 	p(ICMP_STAT_BMCASTTSTAMP, "\t%" PRIu64 " multicast timestamp request%s ignored\n");
    673 	for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
    674 		if (icmpstat[ICMP_STAT_INHIST + i] != 0) {
    675 			if (first) {
    676 				printf("\tInput histogram:\n");
    677 				first = 0;
    678 			}
    679 			printf("\t\t%s: %" PRIu64 "\n", icmp_type[i],
    680 			    icmpstat[ICMP_STAT_INHIST + i]);
    681 		}
    682 	p(ICMP_STAT_REFLECT, "\t%" PRIu64 " message response%s generated\n");
    683 	p(ICMP_STAT_PMTUCHG, "\t%" PRIu64 " path MTU change%s\n");
    684 #undef p
    685 }
    686 
    687 /*
    688  * Dump IGMP statistics structure.
    689  */
    690 void
    691 igmp_stats(u_long off, const char *name)
    692 {
    693 	uint64_t igmpstat[IGMP_NSTATS];
    694 
    695 	if (use_sysctl) {
    696 		size_t size = sizeof(igmpstat);
    697 
    698 		if (sysctlbyname("net.inet.igmp.stats", igmpstat, &size,
    699 				 NULL, 0) == -1)
    700 			return;
    701 	} else {
    702 		warnx("%s stats not available via KVM.", name);
    703 		return;
    704 	}
    705 
    706 	printf("%s:\n", name);
    707 
    708 #define	p(f, m) if (igmpstat[f] || sflag <= 1) \
    709     printf(m, igmpstat[f], plural(igmpstat[f]))
    710 #define	py(f, m) if (igmpstat[f] || sflag <= 1) \
    711     printf(m, igmpstat[f], igmpstat[f] != 1 ? "ies" : "y")
    712 	p(IGMP_STAT_RCV_TOTAL, "\t%" PRIu64 " message%s received\n");
    713         p(IGMP_STAT_RCV_TOOSHORT, "\t%" PRIu64 " message%s received with too few bytes\n");
    714         p(IGMP_STAT_RCV_BADSUM, "\t%" PRIu64 " message%s received with bad checksum\n");
    715         py(IGMP_STAT_RCV_QUERIES, "\t%" PRIu64 " membership quer%s received\n");
    716         py(IGMP_STAT_RCV_BADQUERIES, "\t%" PRIu64 " membership quer%s received with invalid field(s)\n");
    717         p(IGMP_STAT_RCV_REPORTS, "\t%" PRIu64 " membership report%s received\n");
    718         p(IGMP_STAT_RCV_BADREPORTS, "\t%" PRIu64 " membership report%s received with invalid field(s)\n");
    719         p(IGMP_STAT_RCV_OURREPORTS, "\t%" PRIu64 " membership report%s received for groups to which we belong\n");
    720         p(IGMP_STAT_SND_REPORTS, "\t%" PRIu64 " membership report%s sent\n");
    721 #undef p
    722 #undef py
    723 }
    724 
    725 /*
    726  * Dump CARP statistics structure.
    727  */
    728 void
    729 carp_stats(u_long off, const char *name)
    730 {
    731 	uint64_t carpstat[CARP_NSTATS];
    732 
    733 	if (use_sysctl) {
    734 		size_t size = sizeof(carpstat);
    735 
    736 		if (sysctlbyname("net.inet.carp.stats", carpstat, &size,
    737 				 NULL, 0) == -1)
    738 			return;
    739 	} else {
    740 		warnx("%s stats not available via KVM.", name);
    741 		return;
    742 	}
    743 
    744 	printf("%s:\n", name);
    745 
    746 #define p(f, m) if (carpstat[f] || sflag <= 1) \
    747 	printf(m, carpstat[f], plural(carpstat[f]))
    748 #define p2(f, m) if (carpstat[f] || sflag <= 1) \
    749 	printf(m, carpstat[f])
    750 
    751 	p(CARP_STAT_IPACKETS, "\t%" PRIu64 " packet%s received (IPv4)\n");
    752 	p(CARP_STAT_IPACKETS6, "\t%" PRIu64 " packet%s received (IPv6)\n");
    753 	p(CARP_STAT_BADIF,
    754 	    "\t\t%" PRIu64 " packet%s discarded for bad interface\n");
    755 	p(CARP_STAT_BADTTL,
    756 	    "\t\t%" PRIu64 " packet%s discarded for wrong TTL\n");
    757 	p(CARP_STAT_HDROPS, "\t\t%" PRIu64 " packet%s shorter than header\n");
    758 	p(CARP_STAT_BADSUM, "\t\t%" PRIu64
    759 		" packet%s discarded for bad checksum\n");
    760 	p(CARP_STAT_BADVER,
    761 	    "\t\t%" PRIu64 " packet%s discarded with a bad version\n");
    762 	p2(CARP_STAT_BADLEN,
    763 	    "\t\t%" PRIu64 " discarded because packet was too short\n");
    764 	p(CARP_STAT_BADAUTH,
    765 	    "\t\t%" PRIu64 " packet%s discarded for bad authentication\n");
    766 	p(CARP_STAT_BADVHID, "\t\t%" PRIu64 " packet%s discarded for bad vhid\n");
    767 	p(CARP_STAT_BADADDRS, "\t\t%" PRIu64
    768 		" packet%s discarded because of a bad address list\n");
    769 	p(CARP_STAT_OPACKETS, "\t%" PRIu64 " packet%s sent (IPv4)\n");
    770 	p(CARP_STAT_OPACKETS6, "\t%" PRIu64 " packet%s sent (IPv6)\n");
    771 	p2(CARP_STAT_ONOMEM,
    772 	    "\t\t%" PRIu64 " send failed due to mbuf memory error\n");
    773 #undef p
    774 #undef p2
    775 }
    776 
    777 /*
    778  * Dump PIM statistics structure.
    779  */
    780 void
    781 pim_stats(u_long off, const char *name)
    782 {
    783 	struct pimstat pimstat;
    784 
    785 	if (off == 0)
    786 		return;
    787 	if (kread(off, (char *)&pimstat, sizeof (pimstat)) != 0) {
    788 		/* XXX: PIM is probably not enabled in the kernel */
    789 		return;
    790 	}
    791 
    792 	printf("%s:\n", name);
    793 
    794 #define	p(f, m) if (pimstat.f || sflag <= 1) \
    795 	printf(m, pimstat.f, plural(pimstat.f))
    796 
    797 	p(pims_rcv_total_msgs, "\t%" PRIu64 " message%s received\n");
    798 	p(pims_rcv_total_bytes, "\t%" PRIu64 " byte%s received\n");
    799 	p(pims_rcv_tooshort, "\t%" PRIu64 " message%s received with too few bytes\n");
    800         p(pims_rcv_badsum, "\t%" PRIu64 " message%s received with bad checksum\n");
    801 	p(pims_rcv_badversion, "\t%" PRIu64 " message%s received with bad version\n");
    802 	p(pims_rcv_registers_msgs, "\t%" PRIu64 " data register message%s received\n");
    803 	p(pims_rcv_registers_bytes, "\t%" PRIu64 " data register byte%s received\n");
    804 	p(pims_rcv_registers_wrongiif, "\t%" PRIu64 " data register message%s received on wrong iif\n");
    805 	p(pims_rcv_badregisters, "\t%" PRIu64 " bad register%s received\n");
    806 	p(pims_snd_registers_msgs, "\t%" PRIu64 " data register message%s sent\n");
    807 	p(pims_snd_registers_bytes, "\t%" PRIu64 " data register byte%s sent\n");
    808 #undef p
    809 }
    810 
    811 /*
    812  * Dump the ARP statistics structure.
    813  */
    814 void
    815 arp_stats(u_long off, const char *name)
    816 {
    817 	uint64_t arpstat[ARP_NSTATS];
    818 
    819 	if (use_sysctl) {
    820 		size_t size = sizeof(arpstat);
    821 
    822 		if (sysctlbyname("net.inet.arp.stats", arpstat, &size,
    823 				 NULL, 0) == -1)
    824 			return;
    825 	} else {
    826 		warnx("%s stats not available via KVM.", name);
    827 		return;
    828 	}
    829 
    830 	printf("%s:\n", name);
    831 
    832 #define	ps(f, m) if (arpstat[f] || sflag <= 1) \
    833     printf(m, arpstat[f])
    834 #define	p(f, m) if (arpstat[f] || sflag <= 1) \
    835     printf(m, arpstat[f], plural(arpstat[f]))
    836 
    837 	p(ARP_STAT_SNDTOTAL, "\t%" PRIu64 " packet%s sent\n");
    838 	p(ARP_STAT_SNDREPLY, "\t\t%" PRIu64 " reply packet%s\n");
    839 	p(ARP_STAT_SENDREQUEST, "\t\t%" PRIu64 " request packet%s\n");
    840 
    841 	p(ARP_STAT_RCVTOTAL, "\t%" PRIu64 " packet%s received\n");
    842 	p(ARP_STAT_RCVREPLY, "\t\t%" PRIu64 " reply packet%s\n");
    843 	p(ARP_STAT_RCVREQUEST, "\t\t%" PRIu64 " valid request packet%s\n");
    844 	p(ARP_STAT_RCVMCAST, "\t\t%" PRIu64 " broadcast/multicast packet%s\n");
    845 	p(ARP_STAT_RCVBADPROTO, "\t\t%" PRIu64 " packet%s with unknown protocol type\n");
    846 	p(ARP_STAT_RCVBADLEN, "\t\t%" PRIu64 " packet%s with bad (short) length\n");
    847 	p(ARP_STAT_RCVZEROTPA, "\t\t%" PRIu64 " packet%s with null target IP address\n");
    848 	p(ARP_STAT_RCVZEROSPA, "\t\t%" PRIu64 " packet%s with null source IP address\n");
    849 	ps(ARP_STAT_RCVNOINT, "\t\t%" PRIu64 " could not be mapped to an interface\n");
    850 	p(ARP_STAT_RCVLOCALSHA, "\t\t%" PRIu64 " packet%s sourced from a local hardware "
    851 	    "address\n");
    852 	p(ARP_STAT_RCVBCASTSHA, "\t\t%" PRIu64 " packet%s with a broadcast "
    853 	    "source hardware address\n");
    854 	p(ARP_STAT_RCVLOCALSPA, "\t\t%" PRIu64 " duplicate%s for a local IP address\n");
    855 	p(ARP_STAT_RCVOVERPERM, "\t\t%" PRIu64 " attempt%s to overwrite a static entry\n");
    856 	p(ARP_STAT_RCVOVERINT, "\t\t%" PRIu64 " packet%s received on wrong interface\n");
    857 	p(ARP_STAT_RCVOVER, "\t\t%" PRIu64 " entry%s overwritten\n");
    858 	p(ARP_STAT_RCVLENCHG, "\t\t%" PRIu64 " change%s in hardware address length\n");
    859 
    860 	p(ARP_STAT_DFRTOTAL, "\t%" PRIu64 " packet%s deferred pending ARP resolution\n");
    861 	ps(ARP_STAT_DFRSENT, "\t\t%" PRIu64 " sent\n");
    862 	ps(ARP_STAT_DFRDROPPED, "\t\t%" PRIu64 " dropped\n");
    863 
    864 	p(ARP_STAT_ALLOCFAIL, "\t%" PRIu64 " failure%s to allocate llinfo\n");
    865 
    866 #undef ps
    867 #undef p
    868 }
    869 
    870 /*
    871  * Pretty print an Internet address (net address + port).
    872  * Take numeric_addr and numeric_port into consideration.
    873  */
    874 void
    875 inetprint(struct in_addr *in, uint16_t port, const char *proto,
    876 	  int port_numeric)
    877 {
    878 	struct servent *sp = 0;
    879 	char line[80], *cp;
    880 	size_t space;
    881 
    882 	(void)snprintf(line, sizeof line, "%.*s.",
    883 	    (Aflag && !numeric_addr) ? 12 : 16, inetname(in));
    884 	cp = strchr(line, '\0');
    885 	if (!port_numeric && port)
    886 		sp = getservbyport((int)port, proto);
    887 	space = sizeof line - (cp-line);
    888 	if (sp || port == 0)
    889 		(void)snprintf(cp, space, "%s", sp ? sp->s_name : "*");
    890 	else
    891 		(void)snprintf(cp, space, "%u", ntohs(port));
    892 	(void)printf(" %-*.*s", width, width, line);
    893 }
    894 
    895 /*
    896  * Construct an Internet address representation.
    897  * If numeric_addr has been supplied, give
    898  * numeric value, otherwise try for symbolic name.
    899  */
    900 char *
    901 inetname(struct in_addr *inp)
    902 {
    903 	char *cp;
    904 	static char line[50];
    905 	struct hostent *hp;
    906 	struct netent *np;
    907 	static char domain[MAXHOSTNAMELEN + 1];
    908 	static int first = 1;
    909 
    910 	if (first && !numeric_addr) {
    911 		first = 0;
    912 		if (gethostname(domain, sizeof domain) == 0) {
    913 			domain[sizeof(domain) - 1] = '\0';
    914 			if ((cp = strchr(domain, '.')))
    915 				(void) strlcpy(domain, cp + 1, sizeof(domain));
    916 			else
    917 				domain[0] = 0;
    918 		} else
    919 			domain[0] = 0;
    920 	}
    921 	cp = 0;
    922 	if (!numeric_addr && inp->s_addr != INADDR_ANY) {
    923 		int net = inet_netof(*inp);
    924 		int lna = inet_lnaof(*inp);
    925 
    926 		if (lna == INADDR_ANY) {
    927 			np = getnetbyaddr(net, AF_INET);
    928 			if (np)
    929 				cp = np->n_name;
    930 		}
    931 		if (cp == 0) {
    932 			hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
    933 			if (hp) {
    934 				if ((cp = strchr(hp->h_name, '.')) &&
    935 				    !strcmp(cp + 1, domain))
    936 					*cp = 0;
    937 				cp = hp->h_name;
    938 			}
    939 		}
    940 	}
    941 	if (inp->s_addr == INADDR_ANY)
    942 		strlcpy(line, "*", sizeof line);
    943 	else if (cp)
    944 		strlcpy(line, cp, sizeof line);
    945 	else {
    946 		inp->s_addr = ntohl(inp->s_addr);
    947 #define C(x)	((x) & 0xff)
    948 		(void)snprintf(line, sizeof line, "%u.%u.%u.%u",
    949 		    C(inp->s_addr >> 24), C(inp->s_addr >> 16),
    950 		    C(inp->s_addr >> 8), C(inp->s_addr));
    951 #undef C
    952 	}
    953 	return (line);
    954 }
    955 
    956 /*
    957  * Dump the contents of a TCP PCB.
    958  */
    959 void
    960 tcp_dump(u_long off, const char *name, u_long pcbaddr)
    961 {
    962 	callout_impl_t *ci;
    963 	struct tcpcb tcpcb;
    964 	int i, hardticks;
    965 	struct kinfo_pcb *pcblist;
    966 	size_t j, len;
    967 
    968 	if (use_sysctl)
    969 		pcblist = getpcblist_sysctl(name, &len);
    970 	else
    971 		pcblist = getpcblist_kmem(off, name, &len);
    972 
    973 	for (j = 0; j < len; j++)
    974 		if (pcblist[j].ki_ppcbaddr == pcbaddr)
    975 			break;
    976 	free(pcblist);
    977 
    978 	if (j == len)
    979 		errx(1, "0x%lx is not a valid pcb address", pcbaddr);
    980 
    981 	kread(pcbaddr, (char *)&tcpcb, sizeof(tcpcb));
    982 	hardticks = get_hardticks();
    983 
    984 	printf("TCP Protocol Control Block at 0x%08lx:\n\n", pcbaddr);
    985 
    986 	printf("Timers:\n");
    987 	for (i = 0; i < TCPT_NTIMERS; i++) {
    988 		char buf[128];
    989 		ci = (callout_impl_t *)&tcpcb.t_timer[i];
    990 		snprintb(buf, sizeof(buf), CALLOUT_FMT, ci->c_flags);
    991 		printf("\t%s\t%s", tcptimers[i], buf);
    992 		if (ci->c_flags & CALLOUT_PENDING)
    993 			printf("\t%d\n", ci->c_time - hardticks);
    994 		else
    995 			printf("\n");
    996 	}
    997 	printf("\n\n");
    998 
    999 	if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
   1000 		printf("State: %d", tcpcb.t_state);
   1001 	else
   1002 		printf("State: %s", tcpstates[tcpcb.t_state]);
   1003 	printf(", flags 0x%x, inpcb 0x%lx, in6pcb 0x%lx\n\n", tcpcb.t_flags,
   1004 	    (u_long)tcpcb.t_inpcb, (u_long)tcpcb.t_in6pcb);
   1005 
   1006 	printf("rxtshift %d, rxtcur %d, dupacks %d\n", tcpcb.t_rxtshift,
   1007 	    tcpcb.t_rxtcur, tcpcb.t_dupacks);
   1008         printf("peermss %u, ourmss %u, segsz %u, segqlen %u\n\n",
   1009 	    tcpcb.t_peermss, tcpcb.t_ourmss, tcpcb.t_segsz, tcpcb.t_segqlen);
   1010 
   1011 	printf("snd_una %u, snd_nxt %u, snd_up %u\n",
   1012 	    tcpcb.snd_una, tcpcb.snd_nxt, tcpcb.snd_up);
   1013 	printf("snd_wl1 %u, snd_wl2 %u, iss %u, snd_wnd %lu\n\n",
   1014 	    tcpcb.snd_wl1, tcpcb.snd_wl2, tcpcb.iss, tcpcb.snd_wnd);
   1015 
   1016 	printf("rcv_wnd %lu, rcv_nxt %u, rcv_up %u, irs %u\n\n",
   1017 	    tcpcb.rcv_wnd, tcpcb.rcv_nxt, tcpcb.rcv_up, tcpcb.irs);
   1018 
   1019 	printf("rcv_adv %u, snd_max %u, snd_cwnd %lu, snd_ssthresh %lu\n",
   1020 	    tcpcb.rcv_adv, tcpcb.snd_max, tcpcb.snd_cwnd, tcpcb.snd_ssthresh);
   1021 
   1022 	printf("rcvtime %u, rtttime %u, rtseq %u, srtt %d, rttvar %d, "
   1023 	    "rttmin %d, max_sndwnd %lu\n\n", tcpcb.t_rcvtime, tcpcb.t_rtttime,
   1024 	    tcpcb.t_rtseq, tcpcb.t_srtt, tcpcb.t_rttvar, tcpcb.t_rttmin,
   1025 	    tcpcb.max_sndwnd);
   1026 
   1027 	printf("oobflags %d, iobc %d, softerror %d\n\n", tcpcb.t_oobflags,
   1028 	    tcpcb.t_iobc, tcpcb.t_softerror);
   1029 
   1030 	printf("snd_scale %d, rcv_scale %d, req_r_scale %d, req_s_scale %d\n",
   1031 	    tcpcb.snd_scale, tcpcb.rcv_scale, tcpcb.request_r_scale,
   1032 	    tcpcb.requested_s_scale);
   1033 	printf("ts_recent %u, ts_regent_age %d, last_ack_sent %u\n",
   1034 	    tcpcb.ts_recent, tcpcb.ts_recent_age, tcpcb.last_ack_sent);
   1035 }
   1036