1/*-
2 * Copyright (c) 2002 Dag-Erling Co��dan Sm��rgrav
3 * 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 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: releng/11.0/usr.bin/sockstat/sockstat.c 302197 2016-06-25 12:46:18Z tuexen $");
31
32#include <sys/param.h>
33#include <sys/socket.h>
34#include <sys/socketvar.h>
35#include <sys/sysctl.h>
36#include <sys/file.h>
37#include <sys/user.h>
38
39#include <sys/un.h>
40#include <sys/unpcb.h>
41
42#include <net/route.h>
43
44#include <netinet/in.h>
45#include <netinet/in_pcb.h>
46#include <netinet/sctp.h>
47#include <netinet/tcp.h>
48#define TCPSTATES /* load state names */
49#include <netinet/tcp_fsm.h>
50#include <netinet/tcp_seq.h>
51#include <netinet/tcp_var.h>
52#include <arpa/inet.h>
53
54#include <ctype.h>
55#include <err.h>
56#include <errno.h>
57#include <netdb.h>
58#include <pwd.h>
59#include <stdarg.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <string.h>
63#include <unistd.h>
64
65#define	sstosin(ss)	((struct sockaddr_in *)(ss))
66#define	sstosin6(ss)	((struct sockaddr_in6 *)(ss))
67#define	sstosun(ss)	((struct sockaddr_un *)(ss))
68#define	sstosa(ss)	((struct sockaddr *)(ss))
69
70static int	 opt_4;		/* Show IPv4 sockets */
71static int	 opt_6;		/* Show IPv6 sockets */
72static int	 opt_c;		/* Show connected sockets */
73static int	 opt_j;		/* Show specified jail */
74static int	 opt_L;		/* Don't show IPv4 or IPv6 loopback sockets */
75static int	 opt_l;		/* Show listening sockets */
76static int	 opt_s;		/* Show protocol state if applicable */
77static int	 opt_u;		/* Show Unix domain sockets */
78static int	 opt_v;		/* Verbose mode */
79
80/*
81 * Default protocols to use if no -P was defined.
82 */
83static const char *default_protos[] = {"sctp", "tcp", "udp", "divert" };
84static size_t	   default_numprotos = nitems(default_protos);
85
86static int	*protos;	/* protocols to use */
87static size_t	 numprotos;	/* allocated size of protos[] */
88
89static int	*ports;
90
91#define INT_BIT (sizeof(int)*CHAR_BIT)
92#define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
93#define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
94
95struct addr {
96	struct sockaddr_storage address;
97	struct addr *next;
98};
99
100struct sock {
101	void *socket;
102	void *pcb;
103	int shown;
104	int vflag;
105	int family;
106	int proto;
107	int state;
108	const char *protoname;
109	struct addr *laddr;
110	struct addr *faddr;
111	struct sock *next;
112};
113
114#define HASHSIZE 1009
115static struct sock *sockhash[HASHSIZE];
116
117static struct xfile *xfiles;
118static int nxfiles;
119
120static int
121xprintf(const char *fmt, ...)
122{
123	va_list ap;
124	int len;
125
126	va_start(ap, fmt);
127	len = vprintf(fmt, ap);
128	va_end(ap);
129	if (len < 0)
130		err(1, "printf()");
131	return (len);
132}
133
134
135static int
136get_proto_type(const char *proto)
137{
138	struct protoent *pent;
139
140	if (strlen(proto) == 0)
141		return (0);
142	pent = getprotobyname(proto);
143	if (pent == NULL) {
144		warn("getprotobyname");
145		return (-1);
146	}
147	return (pent->p_proto);
148}
149
150
151static void
152init_protos(int num)
153{
154	int proto_count = 0;
155
156	if (num > 0) {
157		proto_count = num;
158	} else {
159		/* Find the maximum number of possible protocols. */
160		while (getprotoent() != NULL)
161			proto_count++;
162		endprotoent();
163	}
164
165	if ((protos = malloc(sizeof(int) * proto_count)) == NULL)
166		err(1, "malloc");
167	numprotos = proto_count;
168}
169
170
171static int
172parse_protos(char *protospec)
173{
174	char *prot;
175	int proto_type, proto_index;
176
177	if (protospec == NULL)
178		return (-1);
179
180	init_protos(0);
181	proto_index = 0;
182	while ((prot = strsep(&protospec, ",")) != NULL) {
183		if (strlen(prot) == 0)
184			continue;
185		proto_type = get_proto_type(prot);
186		if (proto_type != -1)
187			protos[proto_index++] = proto_type;
188	}
189	numprotos = proto_index;
190	return (proto_index);
191}
192
193
194static void
195parse_ports(const char *portspec)
196{
197	const char *p, *q;
198	int port, end;
199
200	if (ports == NULL)
201		if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
202			err(1, "calloc()");
203	p = portspec;
204	while (*p != '\0') {
205		if (!isdigit(*p))
206			errx(1, "syntax error in port range");
207		for (q = p; *q != '\0' && isdigit(*q); ++q)
208			/* nothing */ ;
209		for (port = 0; p < q; ++p)
210			port = port * 10 + digittoint(*p);
211		if (port < 0 || port > 65535)
212			errx(1, "invalid port number");
213		SET_PORT(port);
214		switch (*p) {
215		case '-':
216			++p;
217			break;
218		case ',':
219			++p;
220			/* fall through */
221		case '\0':
222		default:
223			continue;
224		}
225		for (q = p; *q != '\0' && isdigit(*q); ++q)
226			/* nothing */ ;
227		for (end = 0; p < q; ++p)
228			end = end * 10 + digittoint(*p);
229		if (end < port || end > 65535)
230			errx(1, "invalid port number");
231		while (port++ < end)
232			SET_PORT(port);
233		if (*p == ',')
234			++p;
235	}
236}
237
238static void
239sockaddr(struct sockaddr_storage *ss, int af, void *addr, int port)
240{
241	struct sockaddr_in *sin4;
242	struct sockaddr_in6 *sin6;
243
244	bzero(ss, sizeof(*ss));
245	switch (af) {
246	case AF_INET:
247		sin4 = sstosin(ss);
248		sin4->sin_len = sizeof(*sin4);
249		sin4->sin_family = af;
250		sin4->sin_port = port;
251		sin4->sin_addr = *(struct in_addr *)addr;
252		break;
253	case AF_INET6:
254		sin6 = sstosin6(ss);
255		sin6->sin6_len = sizeof(*sin6);
256		sin6->sin6_family = af;
257		sin6->sin6_port = port;
258		sin6->sin6_addr = *(struct in6_addr *)addr;
259#define	s6_addr16	__u6_addr.__u6_addr16
260		if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
261			sin6->sin6_scope_id =
262			    ntohs(sin6->sin6_addr.s6_addr16[1]);
263			sin6->sin6_addr.s6_addr16[1] = 0;
264		}
265		break;
266	default:
267		abort();
268	}
269}
270
271static void
272free_socket(struct sock *sock)
273{
274	struct addr *cur, *next;
275
276	cur = sock->laddr;
277	while (cur != NULL) {
278		next = cur->next;
279		free(cur);
280		cur = next;
281	}
282	cur = sock->faddr;
283	while (cur != NULL) {
284		next = cur->next;
285		free(cur);
286		cur = next;
287	}
288	free(sock);
289}
290
291static void
292gather_sctp(void)
293{
294	struct sock *sock;
295	struct addr *laddr, *prev_laddr, *faddr, *prev_faddr;
296	struct xsctp_inpcb *xinpcb;
297	struct xsctp_tcb *xstcb;
298	struct xsctp_raddr *xraddr;
299	struct xsctp_laddr *xladdr;
300	const char *varname;
301	size_t len, offset;
302	char *buf;
303	int hash, vflag;
304	int no_stcb, local_all_loopback, foreign_all_loopback;
305
306	vflag = 0;
307	if (opt_4)
308		vflag |= INP_IPV4;
309	if (opt_6)
310		vflag |= INP_IPV6;
311
312	varname = "net.inet.sctp.assoclist";
313	if (sysctlbyname(varname, 0, &len, 0, 0) < 0) {
314		if (errno != ENOENT)
315			err(1, "sysctlbyname()");
316		return;
317	}
318	if ((buf = (char *)malloc(len)) == NULL) {
319		err(1, "malloc()");
320		return;
321	}
322	if (sysctlbyname(varname, buf, &len, 0, 0) < 0) {
323		err(1, "sysctlbyname()");
324		free(buf);
325		return;
326	}
327	xinpcb = (struct xsctp_inpcb *)(void *)buf;
328	offset = sizeof(struct xsctp_inpcb);
329	while ((offset < len) && (xinpcb->last == 0)) {
330		if ((sock = calloc(1, sizeof *sock)) == NULL)
331			err(1, "malloc()");
332		sock->socket = xinpcb->socket;
333		sock->proto = IPPROTO_SCTP;
334		sock->protoname = "sctp";
335		if (xinpcb->maxqlen == 0)
336			sock->state = SCTP_CLOSED;
337		else
338			sock->state = SCTP_LISTEN;
339		if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
340			sock->family = AF_INET6;
341			/*
342			 * Currently there is no way to distinguish between
343			 * IPv6 only sockets or dual family sockets.
344			 * So mark it as dual socket.
345			 */
346			sock->vflag = INP_IPV6 | INP_IPV4;
347		} else {
348			sock->family = AF_INET;
349			sock->vflag = INP_IPV4;
350		}
351		prev_laddr = NULL;
352		local_all_loopback = 1;
353		while (offset < len) {
354			xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
355			offset += sizeof(struct xsctp_laddr);
356			if (xladdr->last == 1)
357				break;
358			if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
359				err(1, "malloc()");
360			switch (xladdr->address.sa.sa_family) {
361			case AF_INET:
362#define __IN_IS_ADDR_LOOPBACK(pina) \
363	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
364				if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
365					local_all_loopback = 0;
366#undef __IN_IS_ADDR_LOOPBACK
367				sockaddr(&laddr->address,
368				         AF_INET,
369				         &xladdr->address.sin.sin_addr,
370				         htons(xinpcb->local_port));
371				break;
372			case AF_INET6:
373				if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
374					local_all_loopback = 0;
375				sockaddr(&laddr->address,
376				         AF_INET6,
377				         &xladdr->address.sin6.sin6_addr,
378				         htons(xinpcb->local_port));
379				break;
380			default:
381				errx(1, "address family %d not supported",
382				     xladdr->address.sa.sa_family);
383			}
384			laddr->next = NULL;
385			if (prev_laddr == NULL)
386				sock->laddr = laddr;
387			else
388				prev_laddr->next = laddr;
389			prev_laddr = laddr;
390		}
391		if (sock->laddr == NULL) {
392			if ((sock->laddr = calloc(1, sizeof(struct addr))) == NULL)
393				err(1, "malloc()");
394			sock->laddr->address.ss_family = sock->family;
395			if (sock->family == AF_INET)
396				sock->laddr->address.ss_len = sizeof(struct sockaddr_in);
397			else
398				sock->laddr->address.ss_len = sizeof(struct sockaddr_in6);
399			local_all_loopback = 0;
400		}
401		if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
402			err(1, "malloc()");
403		sock->faddr->address.ss_family = sock->family;
404		if (sock->family == AF_INET)
405			sock->faddr->address.ss_len = sizeof(struct sockaddr_in);
406		else
407			sock->faddr->address.ss_len = sizeof(struct sockaddr_in6);
408		no_stcb = 1;
409		while (offset < len) {
410			xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
411			offset += sizeof(struct xsctp_tcb);
412			if (no_stcb) {
413				if (opt_l &&
414				    (sock->vflag & vflag) &&
415				    (!opt_L || !local_all_loopback) &&
416				    ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
417				     (xstcb->last == 1))) {
418					hash = (int)((uintptr_t)sock->socket % HASHSIZE);
419					sock->next = sockhash[hash];
420					sockhash[hash] = sock;
421				} else {
422					free_socket(sock);
423				}
424			}
425			if (xstcb->last == 1)
426				break;
427			no_stcb = 0;
428			if (opt_c) {
429				if ((sock = calloc(1, sizeof *sock)) == NULL)
430					err(1, "malloc()");
431				sock->socket = xinpcb->socket;
432				sock->proto = IPPROTO_SCTP;
433				sock->protoname = "sctp";
434				sock->state = (int)xstcb->state;
435				if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
436					sock->family = AF_INET6;
437				/*
438				 * Currently there is no way to distinguish
439				 * between IPv6 only sockets or dual family
440				 *  sockets. So mark it as dual socket.
441				 */
442					sock->vflag = INP_IPV6 | INP_IPV4;
443				} else {
444					sock->family = AF_INET;
445					sock->vflag = INP_IPV4;
446				}
447			}
448			prev_laddr = NULL;
449			local_all_loopback = 1;
450			while (offset < len) {
451				xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
452				offset += sizeof(struct xsctp_laddr);
453				if (xladdr->last == 1)
454					break;
455				if (!opt_c)
456					continue;
457				if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
458					err(1, "malloc()");
459				switch (xladdr->address.sa.sa_family) {
460				case AF_INET:
461#define __IN_IS_ADDR_LOOPBACK(pina) \
462	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
463					if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
464						local_all_loopback = 0;
465#undef __IN_IS_ADDR_LOOPBACK
466					sockaddr(&laddr->address,
467						 AF_INET,
468						 &xladdr->address.sin.sin_addr,
469						 htons(xstcb->local_port));
470					break;
471				case AF_INET6:
472					if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
473						local_all_loopback = 0;
474					sockaddr(&laddr->address,
475						 AF_INET6,
476						 &xladdr->address.sin6.sin6_addr,
477						 htons(xstcb->local_port));
478					break;
479				default:
480					errx(1, "address family %d not supported",
481					     xladdr->address.sa.sa_family);
482				}
483				laddr->next = NULL;
484				if (prev_laddr == NULL)
485					sock->laddr = laddr;
486				else
487					prev_laddr->next = laddr;
488				prev_laddr = laddr;
489			}
490			prev_faddr = NULL;
491			foreign_all_loopback = 1;
492			while (offset < len) {
493				xraddr = (struct xsctp_raddr *)(void *)(buf + offset);
494				offset += sizeof(struct xsctp_raddr);
495				if (xraddr->last == 1)
496					break;
497				if (!opt_c)
498					continue;
499				if ((faddr = calloc(1, sizeof(struct addr))) == NULL)
500					err(1, "malloc()");
501				switch (xraddr->address.sa.sa_family) {
502				case AF_INET:
503#define __IN_IS_ADDR_LOOPBACK(pina) \
504	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
505					if (!__IN_IS_ADDR_LOOPBACK(&xraddr->address.sin.sin_addr))
506						foreign_all_loopback = 0;
507#undef __IN_IS_ADDR_LOOPBACK
508					sockaddr(&faddr->address,
509						 AF_INET,
510						 &xraddr->address.sin.sin_addr,
511						 htons(xstcb->remote_port));
512					break;
513				case AF_INET6:
514					if (!IN6_IS_ADDR_LOOPBACK(&xraddr->address.sin6.sin6_addr))
515						foreign_all_loopback = 0;
516					sockaddr(&faddr->address,
517						 AF_INET6,
518						 &xraddr->address.sin6.sin6_addr,
519						 htons(xstcb->remote_port));
520					break;
521				default:
522					errx(1, "address family %d not supported",
523					     xraddr->address.sa.sa_family);
524				}
525				faddr->next = NULL;
526				if (prev_faddr == NULL)
527					sock->faddr = faddr;
528				else
529					prev_faddr->next = faddr;
530				prev_faddr = faddr;
531			}
532			if (opt_c) {
533				if ((sock->vflag & vflag) &&
534				    (!opt_L ||
535				     !(local_all_loopback || foreign_all_loopback))) {
536					hash = (int)((uintptr_t)sock->socket % HASHSIZE);
537					sock->next = sockhash[hash];
538					sockhash[hash] = sock;
539				} else {
540					free_socket(sock);
541				}
542			}
543		}
544		xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
545		offset += sizeof(struct xsctp_inpcb);
546	}
547	free(buf);
548}
549
550static void
551gather_inet(int proto)
552{
553	struct xinpgen *xig, *exig;
554	struct xinpcb *xip;
555	struct xtcpcb *xtp;
556	struct inpcb *inp;
557	struct xsocket *so;
558	struct sock *sock;
559	struct addr *laddr, *faddr;
560	const char *varname, *protoname;
561	size_t len, bufsize;
562	void *buf;
563	int hash, retry, vflag;
564
565	vflag = 0;
566	if (opt_4)
567		vflag |= INP_IPV4;
568	if (opt_6)
569		vflag |= INP_IPV6;
570
571	switch (proto) {
572	case IPPROTO_TCP:
573		varname = "net.inet.tcp.pcblist";
574		protoname = "tcp";
575		break;
576	case IPPROTO_UDP:
577		varname = "net.inet.udp.pcblist";
578		protoname = "udp";
579		break;
580	case IPPROTO_DIVERT:
581		varname = "net.inet.divert.pcblist";
582		protoname = "div";
583		break;
584	default:
585		errx(1, "protocol %d not supported", proto);
586	}
587
588	buf = NULL;
589	bufsize = 8192;
590	retry = 5;
591	do {
592		for (;;) {
593			if ((buf = realloc(buf, bufsize)) == NULL)
594				err(1, "realloc()");
595			len = bufsize;
596			if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
597				break;
598			if (errno == ENOENT)
599				goto out;
600			if (errno != ENOMEM || len != bufsize)
601				err(1, "sysctlbyname()");
602			bufsize *= 2;
603		}
604		xig = (struct xinpgen *)buf;
605		exig = (struct xinpgen *)(void *)
606		    ((char *)buf + len - sizeof *exig);
607		if (xig->xig_len != sizeof *xig ||
608		    exig->xig_len != sizeof *exig)
609			errx(1, "struct xinpgen size mismatch");
610	} while (xig->xig_gen != exig->xig_gen && retry--);
611
612	if (xig->xig_gen != exig->xig_gen && opt_v)
613		warnx("warning: data may be inconsistent");
614
615	for (;;) {
616		xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
617		if (xig >= exig)
618			break;
619		xip = (struct xinpcb *)xig;
620		xtp = (struct xtcpcb *)xig;
621		switch (proto) {
622		case IPPROTO_TCP:
623			if (xtp->xt_len != sizeof(*xtp)) {
624				warnx("struct xtcpcb size mismatch");
625				goto out;
626			}
627			inp = &xtp->xt_inp;
628			so = &xtp->xt_socket;
629			protoname = xtp->xt_tp.t_flags & TF_TOE ? "toe" : "tcp";
630			break;
631		case IPPROTO_UDP:
632		case IPPROTO_DIVERT:
633			if (xip->xi_len != sizeof(*xip)) {
634				warnx("struct xinpcb size mismatch");
635				goto out;
636			}
637			inp = &xip->xi_inp;
638			so = &xip->xi_socket;
639			break;
640		default:
641			errx(1, "protocol %d not supported", proto);
642		}
643		if ((inp->inp_vflag & vflag) == 0)
644			continue;
645		if (inp->inp_vflag & INP_IPV4) {
646			if ((inp->inp_fport == 0 && !opt_l) ||
647			    (inp->inp_fport != 0 && !opt_c))
648				continue;
649#define __IN_IS_ADDR_LOOPBACK(pina) \
650	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
651			if (opt_L &&
652			    (__IN_IS_ADDR_LOOPBACK(&inp->inp_faddr) ||
653			     __IN_IS_ADDR_LOOPBACK(&inp->inp_laddr)))
654				continue;
655#undef __IN_IS_ADDR_LOOPBACK
656		} else if (inp->inp_vflag & INP_IPV6) {
657			if ((inp->inp_fport == 0 && !opt_l) ||
658			    (inp->inp_fport != 0 && !opt_c))
659				continue;
660			if (opt_L &&
661			    (IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr) ||
662			     IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr)))
663				continue;
664		} else {
665			if (opt_v)
666				warnx("invalid vflag 0x%x", inp->inp_vflag);
667			continue;
668		}
669		if ((sock = calloc(1, sizeof(*sock))) == NULL)
670			err(1, "malloc()");
671		if ((laddr = calloc(1, sizeof *laddr)) == NULL)
672			err(1, "malloc()");
673		if ((faddr = calloc(1, sizeof *faddr)) == NULL)
674			err(1, "malloc()");
675		sock->socket = so->xso_so;
676		sock->proto = proto;
677		if (inp->inp_vflag & INP_IPV4) {
678			sock->family = AF_INET;
679			sockaddr(&laddr->address, sock->family,
680			    &inp->inp_laddr, inp->inp_lport);
681			sockaddr(&faddr->address, sock->family,
682			    &inp->inp_faddr, inp->inp_fport);
683		} else if (inp->inp_vflag & INP_IPV6) {
684			sock->family = AF_INET6;
685			sockaddr(&laddr->address, sock->family,
686			    &inp->in6p_laddr, inp->inp_lport);
687			sockaddr(&faddr->address, sock->family,
688			    &inp->in6p_faddr, inp->inp_fport);
689		}
690		laddr->next = NULL;
691		faddr->next = NULL;
692		sock->laddr = laddr;
693		sock->faddr = faddr;
694		sock->vflag = inp->inp_vflag;
695		if (proto == IPPROTO_TCP)
696			sock->state = xtp->xt_tp.t_state;
697		sock->protoname = protoname;
698		hash = (int)((uintptr_t)sock->socket % HASHSIZE);
699		sock->next = sockhash[hash];
700		sockhash[hash] = sock;
701	}
702out:
703	free(buf);
704}
705
706static void
707gather_unix(int proto)
708{
709	struct xunpgen *xug, *exug;
710	struct xunpcb *xup;
711	struct sock *sock;
712	struct addr *laddr, *faddr;
713	const char *varname, *protoname;
714	size_t len, bufsize;
715	void *buf;
716	int hash, retry;
717
718	switch (proto) {
719	case SOCK_STREAM:
720		varname = "net.local.stream.pcblist";
721		protoname = "stream";
722		break;
723	case SOCK_DGRAM:
724		varname = "net.local.dgram.pcblist";
725		protoname = "dgram";
726		break;
727	case SOCK_SEQPACKET:
728		varname = "net.local.seqpacket.pcblist";
729		protoname = "seqpac";
730		break;
731	default:
732		abort();
733	}
734	buf = NULL;
735	bufsize = 8192;
736	retry = 5;
737	do {
738		for (;;) {
739			if ((buf = realloc(buf, bufsize)) == NULL)
740				err(1, "realloc()");
741			len = bufsize;
742			if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
743				break;
744			if (errno != ENOMEM || len != bufsize)
745				err(1, "sysctlbyname()");
746			bufsize *= 2;
747		}
748		xug = (struct xunpgen *)buf;
749		exug = (struct xunpgen *)(void *)
750		    ((char *)buf + len - sizeof(*exug));
751		if (xug->xug_len != sizeof(*xug) ||
752		    exug->xug_len != sizeof(*exug)) {
753			warnx("struct xinpgen size mismatch");
754			goto out;
755		}
756	} while (xug->xug_gen != exug->xug_gen && retry--);
757
758	if (xug->xug_gen != exug->xug_gen && opt_v)
759		warnx("warning: data may be inconsistent");
760
761	for (;;) {
762		xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
763		if (xug >= exug)
764			break;
765		xup = (struct xunpcb *)xug;
766		if (xup->xu_len != sizeof(*xup)) {
767			warnx("struct xunpcb size mismatch");
768			goto out;
769		}
770		if ((xup->xu_unp.unp_conn == NULL && !opt_l) ||
771		    (xup->xu_unp.unp_conn != NULL && !opt_c))
772			continue;
773		if ((sock = calloc(1, sizeof(*sock))) == NULL)
774			err(1, "malloc()");
775		if ((laddr = calloc(1, sizeof *laddr)) == NULL)
776			err(1, "malloc()");
777		if ((faddr = calloc(1, sizeof *faddr)) == NULL)
778			err(1, "malloc()");
779		sock->socket = xup->xu_socket.xso_so;
780		sock->pcb = xup->xu_unpp;
781		sock->proto = proto;
782		sock->family = AF_UNIX;
783		sock->protoname = protoname;
784		if (xup->xu_unp.unp_addr != NULL)
785			laddr->address =
786			    *(struct sockaddr_storage *)(void *)&xup->xu_addr;
787		else if (xup->xu_unp.unp_conn != NULL)
788			*(void **)&(faddr->address) = xup->xu_unp.unp_conn;
789		laddr->next = NULL;
790		faddr->next = NULL;
791		sock->laddr = laddr;
792		sock->faddr = faddr;
793		hash = (int)((uintptr_t)sock->socket % HASHSIZE);
794		sock->next = sockhash[hash];
795		sockhash[hash] = sock;
796	}
797out:
798	free(buf);
799}
800
801static void
802getfiles(void)
803{
804	size_t len, olen;
805
806	olen = len = sizeof(*xfiles);
807	if ((xfiles = malloc(len)) == NULL)
808		err(1, "malloc()");
809	while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
810		if (errno != ENOMEM || len != olen)
811			err(1, "sysctlbyname()");
812		olen = len *= 2;
813		if ((xfiles = realloc(xfiles, len)) == NULL)
814			err(1, "realloc()");
815	}
816	if (len > 0 && xfiles->xf_size != sizeof(*xfiles))
817		errx(1, "struct xfile size mismatch");
818	nxfiles = len / sizeof(*xfiles);
819}
820
821static int
822printaddr(struct sockaddr_storage *ss)
823{
824	struct sockaddr_un *sun;
825	char addrstr[NI_MAXHOST] = { '\0', '\0' };
826	int error, off, port = 0;
827
828	switch (ss->ss_family) {
829	case AF_INET:
830		if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
831			addrstr[0] = '*';
832		port = ntohs(sstosin(ss)->sin_port);
833		break;
834	case AF_INET6:
835		if (IN6_IS_ADDR_UNSPECIFIED(&sstosin6(ss)->sin6_addr))
836			addrstr[0] = '*';
837		port = ntohs(sstosin6(ss)->sin6_port);
838		break;
839	case AF_UNIX:
840		sun = sstosun(ss);
841		off = (int)((char *)&sun->sun_path - (char *)sun);
842		return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
843	}
844	if (addrstr[0] == '\0') {
845		error = getnameinfo(sstosa(ss), ss->ss_len, addrstr,
846		    sizeof(addrstr), NULL, 0, NI_NUMERICHOST);
847		if (error)
848			errx(1, "getnameinfo()");
849	}
850	if (port == 0)
851		return xprintf("%s:*", addrstr);
852	else
853		return xprintf("%s:%d", addrstr, port);
854}
855
856static const char *
857getprocname(pid_t pid)
858{
859	static struct kinfo_proc proc;
860	size_t len;
861	int mib[4];
862
863	mib[0] = CTL_KERN;
864	mib[1] = KERN_PROC;
865	mib[2] = KERN_PROC_PID;
866	mib[3] = (int)pid;
867	len = sizeof(proc);
868	if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
869		/* Do not warn if the process exits before we get its name. */
870		if (errno != ESRCH)
871			warn("sysctl()");
872		return ("??");
873	}
874	return (proc.ki_comm);
875}
876
877static int
878getprocjid(pid_t pid)
879{
880	static struct kinfo_proc proc;
881	size_t len;
882	int mib[4];
883
884	mib[0] = CTL_KERN;
885	mib[1] = KERN_PROC;
886	mib[2] = KERN_PROC_PID;
887	mib[3] = (int)pid;
888	len = sizeof(proc);
889	if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
890		/* Do not warn if the process exits before we get its jid. */
891		if (errno != ESRCH)
892			warn("sysctl()");
893		return (-1);
894	}
895	return (proc.ki_jid);
896}
897
898static int
899check_ports(struct sock *s)
900{
901	int port;
902	struct addr *addr;
903
904	if (ports == NULL)
905		return (1);
906	if ((s->family != AF_INET) && (s->family != AF_INET6))
907		return (1);
908	for (addr = s->laddr; addr != NULL; addr = addr->next) {
909		if (s->family == AF_INET)
910			port = ntohs(sstosin(&addr->address)->sin_port);
911		else
912			port = ntohs(sstosin6(&addr->address)->sin6_port);
913		if (CHK_PORT(port))
914			return (1);
915	}
916	for (addr = s->faddr; addr != NULL; addr = addr->next) {
917		if (s->family == AF_INET)
918			port = ntohs(sstosin(&addr->address)->sin_port);
919		else
920			port = ntohs(sstosin6(&addr->address)->sin6_port);
921		if (CHK_PORT(port))
922			return (1);
923	}
924	return (0);
925}
926
927static const char *
928sctp_state(int state)
929{
930	switch (state) {
931	case SCTP_CLOSED:
932		return "CLOSED";
933		break;
934	case SCTP_BOUND:
935		return "BOUND";
936		break;
937	case SCTP_LISTEN:
938		return "LISTEN";
939		break;
940	case SCTP_COOKIE_WAIT:
941		return "COOKIE_WAIT";
942		break;
943	case SCTP_COOKIE_ECHOED:
944		return "COOKIE_ECHOED";
945		break;
946	case SCTP_ESTABLISHED:
947		return "ESTABLISHED";
948		break;
949	case SCTP_SHUTDOWN_SENT:
950		return "SHUTDOWN_SENT";
951		break;
952	case SCTP_SHUTDOWN_RECEIVED:
953		return "SHUTDOWN_RECEIVED";
954		break;
955	case SCTP_SHUTDOWN_ACK_SENT:
956		return "SHUTDOWN_ACK_SENT";
957		break;
958	case SCTP_SHUTDOWN_PENDING:
959		return "SHUTDOWN_PENDING";
960		break;
961	default:
962		return "UNKNOWN";
963		break;
964	}
965}
966
967static void
968displaysock(struct sock *s, int pos)
969{
970	void *p;
971	int hash, first;
972	struct addr *laddr, *faddr;
973	struct sock *s_tmp;
974
975	while (pos < 29)
976		pos += xprintf(" ");
977	pos += xprintf("%s", s->protoname);
978	if (s->vflag & INP_IPV4)
979		pos += xprintf("4");
980	if (s->vflag & INP_IPV6)
981		pos += xprintf("6");
982	if (s->vflag & (INP_IPV4 | INP_IPV6))
983		pos += xprintf(" ");
984	laddr = s->laddr;
985	faddr = s->faddr;
986	first = 1;
987	while (laddr != NULL || faddr != NULL) {
988		while (pos < 36)
989			pos += xprintf(" ");
990		switch (s->family) {
991		case AF_INET:
992		case AF_INET6:
993			if (laddr != NULL) {
994				pos += printaddr(&laddr->address);
995				if (s->family == AF_INET6 && pos >= 58)
996					pos += xprintf(" ");
997			}
998			while (pos < 58)
999				pos += xprintf(" ");
1000			if (faddr != NULL)
1001				pos += printaddr(&faddr->address);
1002			break;
1003		case AF_UNIX:
1004			if ((laddr == NULL) || (faddr == NULL))
1005				errx(1, "laddr = %p or faddr = %p is NULL",
1006				     (void *)laddr, (void *)faddr);
1007			/* server */
1008			if (laddr->address.ss_len > 0) {
1009				pos += printaddr(&laddr->address);
1010				break;
1011			}
1012			/* client */
1013			p = *(void **)&(faddr->address);
1014			if (p == NULL) {
1015				pos += xprintf("(not connected)");
1016				break;
1017			}
1018			pos += xprintf("-> ");
1019			for (hash = 0; hash < HASHSIZE; ++hash) {
1020				for (s_tmp = sockhash[hash];
1021				     s_tmp != NULL;
1022				     s_tmp = s_tmp->next)
1023					if (s_tmp->pcb == p)
1024						break;
1025				if (s_tmp != NULL)
1026					break;
1027			}
1028			if (s_tmp == NULL ||
1029			    s_tmp->laddr == NULL ||
1030			    s_tmp->laddr->address.ss_len == 0)
1031				pos += xprintf("??");
1032			else
1033				pos += printaddr(&s_tmp->laddr->address);
1034			break;
1035		default:
1036			abort();
1037		}
1038		if (first && opt_s &&
1039		    (s->proto == IPPROTO_SCTP || s->proto == IPPROTO_TCP)) {
1040			while (pos < 80)
1041				pos += xprintf(" ");
1042			switch (s->proto) {
1043			case IPPROTO_SCTP:
1044				pos += xprintf("%s", sctp_state(s->state));
1045				break;
1046			case IPPROTO_TCP:
1047				if (s->state >= 0 && s->state < TCP_NSTATES)
1048					pos +=
1049					    xprintf("%s", tcpstates[s->state]);
1050				else
1051					pos += xprintf("?");
1052				break;
1053			}
1054		}
1055		if (laddr != NULL)
1056			laddr = laddr->next;
1057		if (faddr != NULL)
1058			faddr = faddr->next;
1059		if ((laddr != NULL) || (faddr != NULL)) {
1060			xprintf("\n");
1061			pos = 0;
1062		}
1063		first = 0;
1064	}
1065	xprintf("\n");
1066}
1067
1068static void
1069display(void)
1070{
1071	struct passwd *pwd;
1072	struct xfile *xf;
1073	struct sock *s;
1074	int hash, n, pos;
1075
1076	printf("%-8s %-10s %-5s %-2s %-6s %-21s %-21s",
1077	    "USER", "COMMAND", "PID", "FD", "PROTO",
1078	    "LOCAL ADDRESS", "FOREIGN ADDRESS");
1079	if (opt_s)
1080		printf(" %-12s", "STATE");
1081	printf("\n");
1082	setpassent(1);
1083	for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
1084		if (xf->xf_data == NULL)
1085			continue;
1086		if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
1087			continue;
1088		hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
1089		for (s = sockhash[hash]; s != NULL; s = s->next) {
1090			if ((void *)s->socket != xf->xf_data)
1091				continue;
1092			if (!check_ports(s))
1093				continue;
1094			s->shown = 1;
1095			pos = 0;
1096			if ((pwd = getpwuid(xf->xf_uid)) == NULL)
1097				pos += xprintf("%lu ", (u_long)xf->xf_uid);
1098			else
1099				pos += xprintf("%s ", pwd->pw_name);
1100			while (pos < 9)
1101				pos += xprintf(" ");
1102			pos += xprintf("%.10s", getprocname(xf->xf_pid));
1103			while (pos < 20)
1104				pos += xprintf(" ");
1105			pos += xprintf("%lu ", (u_long)xf->xf_pid);
1106			while (pos < 26)
1107				pos += xprintf(" ");
1108			pos += xprintf("%d ", xf->xf_fd);
1109			displaysock(s, pos);
1110		}
1111	}
1112	if (opt_j >= 0)
1113		return;
1114	for (hash = 0; hash < HASHSIZE; hash++) {
1115		for (s = sockhash[hash]; s != NULL; s = s->next) {
1116			if (s->shown)
1117				continue;
1118			if (!check_ports(s))
1119				continue;
1120			pos = 0;
1121			pos += xprintf("%-8s %-10s %-5s %-2s ",
1122			    "?", "?", "?", "?");
1123			displaysock(s, pos);
1124		}
1125	}
1126}
1127
1128static int set_default_protos(void)
1129{
1130	struct protoent *prot;
1131	const char *pname;
1132	size_t pindex;
1133
1134	init_protos(default_numprotos);
1135
1136	for (pindex = 0; pindex < default_numprotos; pindex++) {
1137		pname = default_protos[pindex];
1138		prot = getprotobyname(pname);
1139		if (prot == NULL)
1140			err(1, "getprotobyname: %s", pname);
1141		protos[pindex] = prot->p_proto;
1142	}
1143	numprotos = pindex;
1144	return (pindex);
1145}
1146
1147
1148static void
1149usage(void)
1150{
1151	fprintf(stderr,
1152	    "usage: sockstat [-46cLlsu] [-j jid] [-p ports] [-P protocols]\n");
1153	exit(1);
1154}
1155
1156int
1157main(int argc, char *argv[])
1158{
1159	int protos_defined = -1;
1160	int o, i;
1161
1162	opt_j = -1;
1163	while ((o = getopt(argc, argv, "46cj:Llp:P:suv")) != -1)
1164		switch (o) {
1165		case '4':
1166			opt_4 = 1;
1167			break;
1168		case '6':
1169			opt_6 = 1;
1170			break;
1171		case 'c':
1172			opt_c = 1;
1173			break;
1174		case 'j':
1175			opt_j = atoi(optarg);
1176			break;
1177		case 'L':
1178			opt_L = 1;
1179			break;
1180		case 'l':
1181			opt_l = 1;
1182			break;
1183		case 'p':
1184			parse_ports(optarg);
1185			break;
1186		case 'P':
1187			protos_defined = parse_protos(optarg);
1188			break;
1189		case 's':
1190			opt_s = 1;
1191			break;
1192		case 'u':
1193			opt_u = 1;
1194			break;
1195		case 'v':
1196			++opt_v;
1197			break;
1198		default:
1199			usage();
1200		}
1201
1202	argc -= optind;
1203	argv += optind;
1204
1205	if (argc > 0)
1206		usage();
1207
1208	if ((!opt_4 && !opt_6) && protos_defined != -1)
1209		opt_4 = opt_6 = 1;
1210	if (!opt_4 && !opt_6 && !opt_u)
1211		opt_4 = opt_6 = opt_u = 1;
1212	if ((opt_4 || opt_6) && protos_defined == -1)
1213		protos_defined = set_default_protos();
1214	if (!opt_c && !opt_l)
1215		opt_c = opt_l = 1;
1216
1217	if (opt_4 || opt_6) {
1218		for (i = 0; i < protos_defined; i++)
1219			if (protos[i] == IPPROTO_SCTP)
1220				gather_sctp();
1221			else
1222				gather_inet(protos[i]);
1223	}
1224
1225	if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1226		gather_unix(SOCK_STREAM);
1227		gather_unix(SOCK_DGRAM);
1228		gather_unix(SOCK_SEQPACKET);
1229	}
1230	getfiles();
1231	display();
1232	exit(0);
1233}
1234