sockstat.c revision 294225 
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: stable/10/usr.bin/sockstat/sockstat.c 294225 2016-01-17 14:33:40Z 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->flags & SCTP_PCB_FLAGS_BOUND_V6) {
336			sock->family = AF_INET6;
337			sock->vflag = INP_IPV6;
338		} else {
339			sock->family = AF_INET;
340			sock->vflag = INP_IPV4;
341		}
342		prev_laddr = NULL;
343		local_all_loopback = 1;
344		while (offset < len) {
345			xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
346			offset += sizeof(struct xsctp_laddr);
347			if (xladdr->last == 1)
348				break;
349			if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
350				err(1, "malloc()");
351			switch (xladdr->address.sa.sa_family) {
352			case AF_INET:
353#define __IN_IS_ADDR_LOOPBACK(pina) \
354	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
355				if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
356					local_all_loopback = 0;
357#undef __IN_IS_ADDR_LOOPBACK
358				sockaddr(&laddr->address,
359				         AF_INET,
360				         &xladdr->address.sin.sin_addr,
361				         htons(xinpcb->local_port));
362				break;
363			case AF_INET6:
364				if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
365					local_all_loopback = 0;
366				sockaddr(&laddr->address,
367				         AF_INET6,
368				         &xladdr->address.sin6.sin6_addr,
369				         htons(xinpcb->local_port));
370				break;
371			default:
372				errx(1, "address family %d not supported",
373				     xladdr->address.sa.sa_family);
374			}
375			laddr->next = NULL;
376			if (prev_laddr == NULL)
377				sock->laddr = laddr;
378			else
379				prev_laddr->next = laddr;
380			prev_laddr = laddr;
381		}
382		if (sock->laddr == NULL) {
383			if ((sock->laddr = calloc(1, sizeof(struct addr))) == NULL)
384				err(1, "malloc()");
385			sock->laddr->address.ss_family = sock->family;
386			if (sock->family == AF_INET)
387				sock->laddr->address.ss_len = sizeof(struct sockaddr_in);
388			else
389				sock->laddr->address.ss_len = sizeof(struct sockaddr_in);
390			local_all_loopback = 0;
391		}
392		if ((sock->faddr = calloc(1, sizeof(struct addr))) == NULL)
393			err(1, "malloc()");
394		sock->faddr->address.ss_family = sock->family;
395		if (sock->family == AF_INET)
396			sock->faddr->address.ss_len = sizeof(struct sockaddr_in);
397		else
398			sock->faddr->address.ss_len = sizeof(struct sockaddr_in);
399		no_stcb = 1;
400		while (offset < len) {
401			xstcb = (struct xsctp_tcb *)(void *)(buf + offset);
402			offset += sizeof(struct xsctp_tcb);
403			if (no_stcb) {
404				if (opt_l &&
405				    (!opt_L || !local_all_loopback) &&
406				    ((xinpcb->flags & SCTP_PCB_FLAGS_UDPTYPE) ||
407				     (xstcb->last == 1))) {
408					hash = (int)((uintptr_t)sock->socket % HASHSIZE);
409					sock->next = sockhash[hash];
410					sockhash[hash] = sock;
411				} else {
412					free_socket(sock);
413				}
414			}
415			if (xstcb->last == 1)
416				break;
417			no_stcb = 0;
418			if (opt_c) {
419				if ((sock = calloc(1, sizeof *sock)) == NULL)
420					err(1, "malloc()");
421				sock->socket = xinpcb->socket;
422				sock->proto = IPPROTO_SCTP;
423				sock->protoname = "sctp";
424				if (xinpcb->flags & SCTP_PCB_FLAGS_BOUND_V6) {
425					sock->family = AF_INET6;
426					sock->vflag = INP_IPV6;
427				} else {
428					sock->family = AF_INET;
429					sock->vflag = INP_IPV4;
430				}
431			}
432			prev_laddr = NULL;
433			local_all_loopback = 1;
434			while (offset < len) {
435				xladdr = (struct xsctp_laddr *)(void *)(buf + offset);
436				offset += sizeof(struct xsctp_laddr);
437				if (xladdr->last == 1)
438					break;
439				if (!opt_c)
440					continue;
441				if ((laddr = calloc(1, sizeof(struct addr))) == NULL)
442					err(1, "malloc()");
443				switch (xladdr->address.sa.sa_family) {
444				case AF_INET:
445#define __IN_IS_ADDR_LOOPBACK(pina) \
446	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
447					if (!__IN_IS_ADDR_LOOPBACK(&xladdr->address.sin.sin_addr))
448						local_all_loopback = 0;
449#undef __IN_IS_ADDR_LOOPBACK
450					sockaddr(&laddr->address,
451						 AF_INET,
452						 &xladdr->address.sin.sin_addr,
453						 htons(xstcb->local_port));
454					break;
455				case AF_INET6:
456					if (!IN6_IS_ADDR_LOOPBACK(&xladdr->address.sin6.sin6_addr))
457						local_all_loopback = 0;
458					sockaddr(&laddr->address,
459						 AF_INET6,
460						 &xladdr->address.sin6.sin6_addr,
461						 htons(xstcb->local_port));
462					break;
463				default:
464					errx(1, "address family %d not supported",
465					     xladdr->address.sa.sa_family);
466				}
467				laddr->next = NULL;
468				if (prev_laddr == NULL)
469					sock->laddr = laddr;
470				else
471					prev_laddr->next = laddr;
472				prev_laddr = laddr;
473			}
474			prev_faddr = NULL;
475			foreign_all_loopback = 1;
476			while (offset < len) {
477				xraddr = (struct xsctp_raddr *)(void *)(buf + offset);
478				offset += sizeof(struct xsctp_raddr);
479				if (xraddr->last == 1)
480					break;
481				if (!opt_c)
482					continue;
483				if ((faddr = calloc(1, sizeof(struct addr))) == NULL)
484					err(1, "malloc()");
485				switch (xraddr->address.sa.sa_family) {
486				case AF_INET:
487#define __IN_IS_ADDR_LOOPBACK(pina) \
488	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
489					if (!__IN_IS_ADDR_LOOPBACK(&xraddr->address.sin.sin_addr))
490						foreign_all_loopback = 0;
491#undef __IN_IS_ADDR_LOOPBACK
492					sockaddr(&faddr->address,
493						 AF_INET,
494						 &xraddr->address.sin.sin_addr,
495						 htons(xstcb->remote_port));
496					break;
497				case AF_INET6:
498					if (!IN6_IS_ADDR_LOOPBACK(&xraddr->address.sin6.sin6_addr))
499						foreign_all_loopback = 0;
500					sockaddr(&faddr->address,
501						 AF_INET6,
502						 &xraddr->address.sin6.sin6_addr,
503						 htons(xstcb->remote_port));
504					break;
505				default:
506					errx(1, "address family %d not supported",
507					     xraddr->address.sa.sa_family);
508				}
509				faddr->next = NULL;
510				if (prev_faddr == NULL)
511					sock->faddr = faddr;
512				else
513					prev_faddr->next = faddr;
514				prev_faddr = faddr;
515			}
516			if (opt_c) {
517				if (!opt_L || !(local_all_loopback || foreign_all_loopback)) {
518					hash = (int)((uintptr_t)sock->socket % HASHSIZE);
519					sock->next = sockhash[hash];
520					sockhash[hash] = sock;
521				} else {
522					free_socket(sock);
523				}
524			}
525		}
526		xinpcb = (struct xsctp_inpcb *)(void *)(buf + offset);
527		offset += sizeof(struct xsctp_inpcb);
528	}
529	free(buf);
530}
531
532static void
533gather_inet(int proto)
534{
535	struct xinpgen *xig, *exig;
536	struct xinpcb *xip;
537	struct xtcpcb *xtp;
538	struct inpcb *inp;
539	struct xsocket *so;
540	struct sock *sock;
541	struct addr *laddr, *faddr;
542	const char *varname, *protoname;
543	size_t len, bufsize;
544	void *buf;
545	int hash, retry, state, vflag;
546
547	state = vflag = 0;
548	if (opt_4)
549		vflag |= INP_IPV4;
550	if (opt_6)
551		vflag |= INP_IPV6;
552
553	switch (proto) {
554	case IPPROTO_TCP:
555		varname = "net.inet.tcp.pcblist";
556		protoname = "tcp";
557		break;
558	case IPPROTO_UDP:
559		varname = "net.inet.udp.pcblist";
560		protoname = "udp";
561		break;
562	case IPPROTO_DIVERT:
563		varname = "net.inet.divert.pcblist";
564		protoname = "div";
565		break;
566	default:
567		errx(1, "protocol %d not supported", proto);
568	}
569
570	buf = NULL;
571	bufsize = 8192;
572	retry = 5;
573	do {
574		for (;;) {
575			if ((buf = realloc(buf, bufsize)) == NULL)
576				err(1, "realloc()");
577			len = bufsize;
578			if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
579				break;
580			if (errno == ENOENT)
581				goto out;
582			if (errno != ENOMEM || len != bufsize)
583				err(1, "sysctlbyname()");
584			bufsize *= 2;
585		}
586		xig = (struct xinpgen *)buf;
587		exig = (struct xinpgen *)(void *)
588		    ((char *)buf + len - sizeof *exig);
589		if (xig->xig_len != sizeof *xig ||
590		    exig->xig_len != sizeof *exig)
591			errx(1, "struct xinpgen size mismatch");
592	} while (xig->xig_gen != exig->xig_gen && retry--);
593
594	if (xig->xig_gen != exig->xig_gen && opt_v)
595		warnx("warning: data may be inconsistent");
596
597	for (;;) {
598		xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
599		if (xig >= exig)
600			break;
601		switch (proto) {
602		case IPPROTO_TCP:
603			xtp = (struct xtcpcb *)xig;
604			if (xtp->xt_len != sizeof(*xtp)) {
605				warnx("struct xtcpcb size mismatch");
606				goto out;
607			}
608			inp = &xtp->xt_inp;
609			so = &xtp->xt_socket;
610			protoname = xtp->xt_tp.t_flags & TF_TOE ? "toe" : "tcp";
611			state = xtp->xt_tp.t_state;
612			break;
613		case IPPROTO_UDP:
614		case IPPROTO_DIVERT:
615			xip = (struct xinpcb *)xig;
616			if (xip->xi_len != sizeof(*xip)) {
617				warnx("struct xinpcb size mismatch");
618				goto out;
619			}
620			inp = &xip->xi_inp;
621			so = &xip->xi_socket;
622			break;
623		default:
624			errx(1, "protocol %d not supported", proto);
625		}
626		if ((inp->inp_vflag & vflag) == 0)
627			continue;
628		if (inp->inp_vflag & INP_IPV4) {
629			if ((inp->inp_fport == 0 && !opt_l) ||
630			    (inp->inp_fport != 0 && !opt_c))
631				continue;
632#define __IN_IS_ADDR_LOOPBACK(pina) \
633	((ntohl((pina)->s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET)
634			if (opt_L &&
635			    (__IN_IS_ADDR_LOOPBACK(&inp->inp_faddr) ||
636			     __IN_IS_ADDR_LOOPBACK(&inp->inp_laddr)))
637				continue;
638#undef __IN_IS_ADDR_LOOPBACK
639		} else if (inp->inp_vflag & INP_IPV6) {
640			if ((inp->inp_fport == 0 && !opt_l) ||
641			    (inp->inp_fport != 0 && !opt_c))
642				continue;
643			if (opt_L &&
644			    (IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr) ||
645			     IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr)))
646				continue;
647		} else {
648			if (opt_v)
649				warnx("invalid vflag 0x%x", inp->inp_vflag);
650			continue;
651		}
652		if ((sock = calloc(1, sizeof(*sock))) == NULL)
653			err(1, "malloc()");
654		if ((laddr = calloc(1, sizeof *laddr)) == NULL)
655			err(1, "malloc()");
656		if ((faddr = calloc(1, sizeof *faddr)) == NULL)
657			err(1, "malloc()");
658		sock->socket = so->xso_so;
659		sock->proto = proto;
660		if (inp->inp_vflag & INP_IPV4) {
661			sock->family = AF_INET;
662			sockaddr(&laddr->address, sock->family,
663			    &inp->inp_laddr, inp->inp_lport);
664			sockaddr(&faddr->address, sock->family,
665			    &inp->inp_faddr, inp->inp_fport);
666		} else if (inp->inp_vflag & INP_IPV6) {
667			sock->family = AF_INET6;
668			sockaddr(&laddr->address, sock->family,
669			    &inp->in6p_laddr, inp->inp_lport);
670			sockaddr(&faddr->address, sock->family,
671			    &inp->in6p_faddr, inp->inp_fport);
672		}
673		laddr->next = NULL;
674		faddr->next = NULL;
675		sock->laddr = laddr;
676		sock->faddr = faddr;
677		sock->vflag = inp->inp_vflag;
678		if (proto == IPPROTO_TCP)
679			sock->state = xtp->xt_tp.t_state;
680		sock->protoname = protoname;
681		hash = (int)((uintptr_t)sock->socket % HASHSIZE);
682		sock->next = sockhash[hash];
683		sockhash[hash] = sock;
684	}
685out:
686	free(buf);
687}
688
689static void
690gather_unix(int proto)
691{
692	struct xunpgen *xug, *exug;
693	struct xunpcb *xup;
694	struct sock *sock;
695	struct addr *laddr, *faddr;
696	const char *varname, *protoname;
697	size_t len, bufsize;
698	void *buf;
699	int hash, retry;
700
701	switch (proto) {
702	case SOCK_STREAM:
703		varname = "net.local.stream.pcblist";
704		protoname = "stream";
705		break;
706	case SOCK_DGRAM:
707		varname = "net.local.dgram.pcblist";
708		protoname = "dgram";
709		break;
710	case SOCK_SEQPACKET:
711		varname = "net.local.seqpacket.pcblist";
712		protoname = "seqpac";
713		break;
714	default:
715		abort();
716	}
717	buf = NULL;
718	bufsize = 8192;
719	retry = 5;
720	do {
721		for (;;) {
722			if ((buf = realloc(buf, bufsize)) == NULL)
723				err(1, "realloc()");
724			len = bufsize;
725			if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
726				break;
727			if (errno != ENOMEM || len != bufsize)
728				err(1, "sysctlbyname()");
729			bufsize *= 2;
730		}
731		xug = (struct xunpgen *)buf;
732		exug = (struct xunpgen *)(void *)
733		    ((char *)buf + len - sizeof(*exug));
734		if (xug->xug_len != sizeof(*xug) ||
735		    exug->xug_len != sizeof(*exug)) {
736			warnx("struct xinpgen size mismatch");
737			goto out;
738		}
739	} while (xug->xug_gen != exug->xug_gen && retry--);
740
741	if (xug->xug_gen != exug->xug_gen && opt_v)
742		warnx("warning: data may be inconsistent");
743
744	for (;;) {
745		xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
746		if (xug >= exug)
747			break;
748		xup = (struct xunpcb *)xug;
749		if (xup->xu_len != sizeof(*xup)) {
750			warnx("struct xunpcb size mismatch");
751			goto out;
752		}
753		if ((xup->xu_unp.unp_conn == NULL && !opt_l) ||
754		    (xup->xu_unp.unp_conn != NULL && !opt_c))
755			continue;
756		if ((sock = calloc(1, sizeof(*sock))) == NULL)
757			err(1, "malloc()");
758		if ((laddr = calloc(1, sizeof *laddr)) == NULL)
759			err(1, "malloc()");
760		if ((faddr = calloc(1, sizeof *faddr)) == NULL)
761			err(1, "malloc()");
762		sock->socket = xup->xu_socket.xso_so;
763		sock->pcb = xup->xu_unpp;
764		sock->proto = proto;
765		sock->family = AF_UNIX;
766		sock->protoname = protoname;
767		if (xup->xu_unp.unp_addr != NULL)
768			laddr->address =
769			    *(struct sockaddr_storage *)(void *)&xup->xu_addr;
770		else if (xup->xu_unp.unp_conn != NULL)
771			*(void **)&(faddr->address) = xup->xu_unp.unp_conn;
772		laddr->next = NULL;
773		faddr->next = NULL;
774		sock->laddr = laddr;
775		sock->faddr = faddr;
776		hash = (int)((uintptr_t)sock->socket % HASHSIZE);
777		sock->next = sockhash[hash];
778		sockhash[hash] = sock;
779	}
780out:
781	free(buf);
782}
783
784static void
785getfiles(void)
786{
787	size_t len, olen;
788
789	olen = len = sizeof(*xfiles);
790	if ((xfiles = malloc(len)) == NULL)
791		err(1, "malloc()");
792	while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
793		if (errno != ENOMEM || len != olen)
794			err(1, "sysctlbyname()");
795		olen = len *= 2;
796		if ((xfiles = realloc(xfiles, len)) == NULL)
797			err(1, "realloc()");
798	}
799	if (len > 0 && xfiles->xf_size != sizeof(*xfiles))
800		errx(1, "struct xfile size mismatch");
801	nxfiles = len / sizeof(*xfiles);
802}
803
804static int
805printaddr(struct sockaddr_storage *ss)
806{
807	struct sockaddr_un *sun;
808	char addrstr[NI_MAXHOST] = { '\0', '\0' };
809	int error, off, port = 0;
810
811	switch (ss->ss_family) {
812	case AF_INET:
813		if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
814			addrstr[0] = '*';
815		port = ntohs(sstosin(ss)->sin_port);
816		break;
817	case AF_INET6:
818		if (IN6_IS_ADDR_UNSPECIFIED(&sstosin6(ss)->sin6_addr))
819			addrstr[0] = '*';
820		port = ntohs(sstosin6(ss)->sin6_port);
821		break;
822	case AF_UNIX:
823		sun = sstosun(ss);
824		off = (int)((char *)&sun->sun_path - (char *)sun);
825		return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
826	}
827	if (addrstr[0] == '\0') {
828		error = getnameinfo(sstosa(ss), ss->ss_len, addrstr,
829		    sizeof(addrstr), NULL, 0, NI_NUMERICHOST);
830		if (error)
831			errx(1, "getnameinfo()");
832	}
833	if (port == 0)
834		return xprintf("%s:*", addrstr);
835	else
836		return xprintf("%s:%d", addrstr, port);
837}
838
839static const char *
840getprocname(pid_t pid)
841{
842	static struct kinfo_proc proc;
843	size_t len;
844	int mib[4];
845
846	mib[0] = CTL_KERN;
847	mib[1] = KERN_PROC;
848	mib[2] = KERN_PROC_PID;
849	mib[3] = (int)pid;
850	len = sizeof(proc);
851	if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
852		/* Do not warn if the process exits before we get its name. */
853		if (errno != ESRCH)
854			warn("sysctl()");
855		return ("??");
856	}
857	return (proc.ki_comm);
858}
859
860static int
861getprocjid(pid_t pid)
862{
863	static struct kinfo_proc proc;
864	size_t len;
865	int mib[4];
866
867	mib[0] = CTL_KERN;
868	mib[1] = KERN_PROC;
869	mib[2] = KERN_PROC_PID;
870	mib[3] = (int)pid;
871	len = sizeof(proc);
872	if (sysctl(mib, nitems(mib), &proc, &len, NULL, 0) == -1) {
873		/* Do not warn if the process exits before we get its jid. */
874		if (errno != ESRCH)
875			warn("sysctl()");
876		return (-1);
877	}
878	return (proc.ki_jid);
879}
880
881static int
882check_ports(struct sock *s)
883{
884	int port;
885	struct addr *addr;
886
887	if (ports == NULL)
888		return (1);
889	if ((s->family != AF_INET) && (s->family != AF_INET6))
890		return (1);
891	for (addr = s->laddr; addr != NULL; addr = addr->next) {
892		if (s->family == AF_INET)
893			port = ntohs(sstosin(&addr->address)->sin_port);
894		else
895			port = ntohs(sstosin6(&addr->address)->sin6_port);
896		if (CHK_PORT(port))
897			return (1);
898	}
899	for (addr = s->faddr; addr != NULL; addr = addr->next) {
900		if (s->family == AF_INET)
901			port = ntohs(sstosin(&addr->address)->sin_port);
902		else
903			port = ntohs(sstosin6(&addr->address)->sin6_port);
904		if (CHK_PORT(port))
905			return (1);
906	}
907	return (0);
908}
909
910static void
911displaysock(struct sock *s, int pos)
912{
913	void *p;
914	int hash;
915	struct addr *laddr, *faddr;
916	struct sock *s_tmp;
917
918	while (pos < 29)
919		pos += xprintf(" ");
920	pos += xprintf("%s", s->protoname);
921	if (s->vflag & INP_IPV4)
922		pos += xprintf("4 ");
923	if (s->vflag & INP_IPV6)
924		pos += xprintf("6 ");
925	laddr = s->laddr;
926	faddr = s->faddr;
927	while (laddr != NULL || faddr != NULL) {
928		while (pos < 36)
929			pos += xprintf(" ");
930		switch (s->family) {
931		case AF_INET:
932		case AF_INET6:
933			if (laddr != NULL) {
934				pos += printaddr(&laddr->address);
935				if (s->family == AF_INET6 && pos >= 58)
936					pos += xprintf(" ");
937			}
938			while (pos < 58)
939				pos += xprintf(" ");
940			if (faddr != NULL)
941				pos += printaddr(&faddr->address);
942			break;
943		case AF_UNIX:
944			if ((laddr == NULL) || (faddr == NULL))
945				errx(1, "laddr = %p or faddr = %p is NULL",
946				     (void *)laddr, (void *)faddr);
947			/* server */
948			if (laddr->address.ss_len > 0) {
949				pos += printaddr(&laddr->address);
950				break;
951			}
952			/* client */
953			p = *(void **)&(faddr->address);
954			if (p == NULL) {
955				pos += xprintf("(not connected)");
956				break;
957			}
958			pos += xprintf("-> ");
959			for (hash = 0; hash < HASHSIZE; ++hash) {
960				for (s_tmp = sockhash[hash];
961				     s_tmp != NULL;
962				     s_tmp = s_tmp->next)
963					if (s_tmp->pcb == p)
964						break;
965				if (s_tmp != NULL)
966					break;
967			}
968			if (s_tmp == NULL ||
969			    s_tmp->laddr == NULL ||
970			    s_tmp->laddr->address.ss_len == 0)
971				pos += xprintf("??");
972			else
973				pos += printaddr(&s_tmp->laddr->address);
974			break;
975		default:
976			abort();
977		}
978		if (laddr != NULL)
979			laddr = laddr->next;
980		if (faddr != NULL)
981			faddr = faddr->next;
982		if ((laddr != NULL) || (faddr != NULL)) {
983			xprintf("\n");
984			pos = 0;
985		}
986	}
987	if (opt_s && s->proto == IPPROTO_TCP) {
988		while (pos < 80)
989			pos += xprintf(" ");
990		if (s->state >= 0 && s->state < TCP_NSTATES)
991			pos += xprintf("%s", tcpstates[s->state]);
992		else
993			pos += xprintf("?");
994	}
995}
996
997static void
998display(void)
999{
1000	struct passwd *pwd;
1001	struct xfile *xf;
1002	struct sock *s;
1003	int hash, n, pos;
1004
1005	printf("%-8s %-10s %-5s %-2s %-6s %-21s %-21s",
1006	    "USER", "COMMAND", "PID", "FD", "PROTO",
1007	    "LOCAL ADDRESS", "FOREIGN ADDRESS");
1008	if (opt_s)
1009		printf(" %-12s", "STATE");
1010	printf("\n");
1011	setpassent(1);
1012	for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
1013		if (xf->xf_data == NULL)
1014			continue;
1015		if (opt_j >= 0 && opt_j != getprocjid(xf->xf_pid))
1016			continue;
1017		hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
1018		for (s = sockhash[hash]; s != NULL; s = s->next) {
1019			if ((void *)s->socket != xf->xf_data)
1020				continue;
1021			if (!check_ports(s))
1022				continue;
1023			s->shown = 1;
1024			pos = 0;
1025			if ((pwd = getpwuid(xf->xf_uid)) == NULL)
1026				pos += xprintf("%lu ", (u_long)xf->xf_uid);
1027			else
1028				pos += xprintf("%s ", pwd->pw_name);
1029			while (pos < 9)
1030				pos += xprintf(" ");
1031			pos += xprintf("%.10s", getprocname(xf->xf_pid));
1032			while (pos < 20)
1033				pos += xprintf(" ");
1034			pos += xprintf("%lu ", (u_long)xf->xf_pid);
1035			while (pos < 26)
1036				pos += xprintf(" ");
1037			pos += xprintf("%d ", xf->xf_fd);
1038			displaysock(s, pos);
1039			xprintf("\n");
1040		}
1041	}
1042	if (opt_j >= 0)
1043		return;
1044	for (hash = 0; hash < HASHSIZE; hash++) {
1045		for (s = sockhash[hash]; s != NULL; s = s->next) {
1046			if (s->shown)
1047				continue;
1048			if (!check_ports(s))
1049				continue;
1050			pos = 0;
1051			pos += xprintf("%-8s %-10s %-5s %-2s ",
1052			    "?", "?", "?", "?");
1053			displaysock(s, pos);
1054			xprintf("\n");
1055		}
1056	}
1057}
1058
1059static int set_default_protos(void)
1060{
1061	struct protoent *prot;
1062	const char *pname;
1063	size_t pindex;
1064
1065	init_protos(default_numprotos);
1066
1067	for (pindex = 0; pindex < default_numprotos; pindex++) {
1068		pname = default_protos[pindex];
1069		prot = getprotobyname(pname);
1070		if (prot == NULL)
1071			err(1, "getprotobyname: %s", pname);
1072		protos[pindex] = prot->p_proto;
1073	}
1074	numprotos = pindex;
1075	return (pindex);
1076}
1077
1078
1079static void
1080usage(void)
1081{
1082	fprintf(stderr,
1083	    "usage: sockstat [-46cLlsu] [-j jid] [-p ports] [-P protocols]\n");
1084	exit(1);
1085}
1086
1087int
1088main(int argc, char *argv[])
1089{
1090	int protos_defined = -1;
1091	int o, i;
1092
1093	opt_j = -1;
1094	while ((o = getopt(argc, argv, "46cj:Llp:P:suv")) != -1)
1095		switch (o) {
1096		case '4':
1097			opt_4 = 1;
1098			break;
1099		case '6':
1100			opt_6 = 1;
1101			break;
1102		case 'c':
1103			opt_c = 1;
1104			break;
1105		case 'j':
1106			opt_j = atoi(optarg);
1107			break;
1108		case 'L':
1109			opt_L = 1;
1110			break;
1111		case 'l':
1112			opt_l = 1;
1113			break;
1114		case 'p':
1115			parse_ports(optarg);
1116			break;
1117		case 'P':
1118			protos_defined = parse_protos(optarg);
1119			break;
1120		case 's':
1121			opt_s = 1;
1122			break;
1123		case 'u':
1124			opt_u = 1;
1125			break;
1126		case 'v':
1127			++opt_v;
1128			break;
1129		default:
1130			usage();
1131		}
1132
1133	argc -= optind;
1134	argv += optind;
1135
1136	if (argc > 0)
1137		usage();
1138
1139	if ((!opt_4 && !opt_6) && protos_defined != -1)
1140		opt_4 = opt_6 = 1;
1141	if (!opt_4 && !opt_6 && !opt_u)
1142		opt_4 = opt_6 = opt_u = 1;
1143	if ((opt_4 || opt_6) && protos_defined == -1)
1144		protos_defined = set_default_protos();
1145	if (!opt_c && !opt_l)
1146		opt_c = opt_l = 1;
1147
1148	if (opt_4 || opt_6) {
1149		for (i = 0; i < protos_defined; i++)
1150			if (protos[i] == IPPROTO_SCTP)
1151				gather_sctp();
1152			else
1153				gather_inet(protos[i]);
1154	}
1155
1156	if (opt_u || (protos_defined == -1 && !opt_4 && !opt_6)) {
1157		gather_unix(SOCK_STREAM);
1158		gather_unix(SOCK_DGRAM);
1159		gather_unix(SOCK_SEQPACKET);
1160	}
1161	getfiles();
1162	display();
1163	exit(0);
1164}
1165