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NetBSD/usr.bin/sockstat/sockstat.c

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/* $NetBSD: sockstat.c,v 1.23 2020/08/26 22:57:55 christos Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: sockstat.c,v 1.23 2020/08/26 22:57:55 christos Exp $");
#endif
#define _KMEMUSER
#include <sys/types.h>
#undef _KMEMUSER
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_pcb_hdr.h>
#include <netinet/tcp_fsm.h>
#define _KMEMUSER
/* want DTYPE_* defines */
#include <sys/file.h>
#undef _KMEMUSER
#include <arpa/inet.h>
#include <bitstring.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>
#include <util.h>
#include "prog_ops.h"
#define satosun(sa) ((struct sockaddr_un *)(sa))
#define satosin(sa) ((struct sockaddr_in *)(sa))
#ifdef INET6
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
#endif
void parse_ports(const char *);
int get_num(const char *, const char **, const char **);
void get_sockets(const char *);
void get_files(void);
int sort_files(const void *, const void *);
void sysctl_sucker(int *, u_int, void **, size_t *);
void socket_add_hash(struct kinfo_pcb *, int);
int isconnected(struct kinfo_pcb *);
int islistening(struct kinfo_pcb *);
struct kinfo_pcb *pick_socket(struct kinfo_file *);
int get_proc(struct kinfo_proc2 *, int);
int print_socket(struct kinfo_file *, struct kinfo_pcb *,
struct kinfo_proc2 *);
void print_addr(int, int, int, struct sockaddr *);
LIST_HEAD(socklist, sockitem);
#define HASHSIZE 1009
struct socklist sockhash[HASHSIZE];
struct sockitem {
LIST_ENTRY(sockitem) s_list;
struct kinfo_pcb *s_sock;
};
struct kinfo_file *flist;
size_t flistc;
int pf_list, only, nonames;
bitstr_t *portmap;
#define PF_LIST_INET 1
#ifdef INET6
#define PF_LIST_INET6 2
#endif
#define PF_LIST_LOCAL 4
#define ONLY_CONNECTED 1
#define ONLY_LISTEN 2
int
main(int argc, char *argv[])
{
struct kinfo_pcb *kp;
int ch;
size_t i;
struct kinfo_proc2 p;
pf_list = only = 0;
#ifdef INET6
while ((ch = getopt(argc, argv, "46cf:lnp:u")) != - 1) {
#else
while ((ch = getopt(argc, argv, "4cf:lnp:u")) != - 1) {
#endif
switch (ch) {
case '4':
pf_list |= PF_LIST_INET;
break;
#ifdef INET6
case '6':
pf_list |= PF_LIST_INET6;
break;
#endif
case 'c':
only |= ONLY_CONNECTED;
break;
case 'f':
if (strcasecmp(optarg, "inet") == 0)
pf_list |= PF_LIST_INET;
#ifdef INET6
else if (strcasecmp(optarg, "inet6") == 0)
pf_list |= PF_LIST_INET6;
#endif
else if (strcasecmp(optarg, "local") == 0)
pf_list |= PF_LIST_LOCAL;
else if (strcasecmp(optarg, "unix") == 0)
pf_list |= PF_LIST_LOCAL;
else
errx(1, "%s: unsupported protocol family",
optarg);
break;
case 'l':
only |= ONLY_LISTEN;
break;
case 'n':
nonames++;
break;
case 'p':
parse_ports(optarg);
break;
case 'u':
pf_list |= PF_LIST_LOCAL;
break;
default:
/* usage(); */
exit(1);
}
}
argc -= optind;
argv += optind;
if (prog_init && prog_init() == -1)
err(1, "init");
if ((portmap != NULL) && (pf_list == 0)) {
pf_list = PF_LIST_INET;
#ifdef INET6
pf_list |= PF_LIST_INET6;
#endif
}
if (pf_list == 0) {
pf_list = PF_LIST_INET | PF_LIST_LOCAL;
#ifdef INET6
pf_list |= PF_LIST_INET6;
#endif
}
if ((portmap != NULL) && (pf_list & PF_LIST_LOCAL))
errx(1, "local domain sockets do not have ports");
if (pf_list & PF_LIST_INET) {
get_sockets("net.inet.tcp.pcblist");
get_sockets("net.inet.udp.pcblist");
if (portmap == NULL)
get_sockets("net.inet.raw.pcblist");
}
#ifdef INET6
if (pf_list & PF_LIST_INET6) {
get_sockets("net.inet6.tcp6.pcblist");
get_sockets("net.inet6.udp6.pcblist");
if (portmap == NULL)
get_sockets("net.inet6.raw6.pcblist");
}
#endif
if (pf_list & PF_LIST_LOCAL) {
get_sockets("net.local.stream.pcblist");
get_sockets("net.local.seqpacket.pcblist");
get_sockets("net.local.dgram.pcblist");
}
get_files();
p.p_pid = 0;
for (i = 0; i < flistc; i++)
if ((kp = pick_socket(&flist[i])) != NULL &&
get_proc(&p, flist[i].ki_pid) == 0)
print_socket(&flist[i], kp, &p);
return (0);
}
void
parse_ports(const char *l)
{
struct servent *srv;
const char *s, *e;
long i, j;
if (portmap == NULL) {
portmap = bit_alloc(65536);
if (portmap == NULL)
err(1, "malloc");
}
if ((srv = getservbyname(l, NULL)) != NULL) {
bit_set(portmap, ntohs(srv->s_port));
return;
}
s = e = l;
while (*s != '\0') {
i = get_num(l, &s, &e);
switch (*e) {
case ',':
e++;
/* FALLTHROUGH */
case '\0':
bit_set(portmap, i);
s = e;
continue;
case '-':
s = ++e;
j = get_num(l, &s, &e);
for (; i <= j; i++)
bit_set(portmap, i);
break;
default:
errno = EINVAL;
err(1, "%s", l);
}
}
}
int
get_num(const char *l, const char **s, const char **e)
{
long x;
char *t;
while (isdigit((u_int)**e))
(*e)++;
if (*s != *e) {
errno = 0;
x = strtol(*s, &t, 0);
if (errno == 0 && x >= 0 && x <= 65535 && t == *e)
return (x);
}
errno = EINVAL;
err(1, "%s", l);
}
void
get_sockets(const char *mib)
{
void *v;
size_t sz;
int rc, n, name[CTL_MAXNAME];
u_int namelen;
sz = CTL_MAXNAME;
rc = prog_sysctlnametomib(mib, &name[0], &sz);
if (rc == -1) {
if (errno == ENOENT)
return;
err(1, "sysctlnametomib: %s", mib);
}
namelen = sz;
name[namelen++] = PCB_ALL;
name[namelen++] = 0; /* XXX all pids */
name[namelen++] = sizeof(struct kinfo_pcb);
name[namelen++] = INT_MAX; /* all of them */
sysctl_sucker(&name[0], namelen, &v, &sz);
n = sz / sizeof(struct kinfo_pcb);
socket_add_hash(v, n);
}
void
get_files(void)
{
void *v;
size_t sz;
int rc, name[CTL_MAXNAME];
u_int namelen;
sz = CTL_MAXNAME;
rc = prog_sysctlnametomib("kern.file2", &name[0], &sz);
if (rc == -1)
err(1, "sysctlnametomib");
namelen = sz;
name[namelen++] = KERN_FILE_BYPID;
name[namelen++] = 0; /* XXX all pids */
name[namelen++] = sizeof(struct kinfo_file);
name[namelen++] = INT_MAX; /* all of them */
sysctl_sucker(&name[0], namelen, &v, &sz);
flist = v;
flistc = sz / sizeof(struct kinfo_file);
qsort(flist, flistc, sizeof(*flist), sort_files);
}
int
sort_files(const void *a, const void *b)
{
const struct kinfo_file *ka = a, *kb = b;
if (ka->ki_pid == kb->ki_pid)
return (ka->ki_fd - kb->ki_fd);
return (ka->ki_pid - kb->ki_pid);
}
void
sysctl_sucker(int *name, u_int namelen, void **vp, size_t *szp)
{
int rc;
void *v;
size_t sz;
/* printf("name %p, namelen %u\n", name, namelen); */
v = NULL;
sz = 0;
do {
rc = prog_sysctl(&name[0], namelen, v, &sz, NULL, 0);
if (rc == -1 && errno != ENOMEM)
err(1, "sysctl");
if (rc == -1 && v != NULL) {
free(v);
v = NULL;
}
if (v == NULL) {
v = malloc(sz);
rc = -1;
}
if (v == NULL)
err(1, "malloc");
} while (rc == -1);
*vp = v;
*szp = sz;
/* printf("got %zu at %p\n", sz, v); */
}
void
socket_add_hash(struct kinfo_pcb *kp, int n)
{
struct sockitem *si;
int hash, i;
if (n == 0)
return;
si = malloc(sizeof(*si) * n);
if (si== NULL)
err(1, "malloc");
for (i = 0; i < n; i++) {
si[i].s_sock = &kp[i];
hash = (int)(kp[i].ki_sockaddr % HASHSIZE);
LIST_INSERT_HEAD(&sockhash[hash], &si[i], s_list);
}
}
int
isconnected(struct kinfo_pcb *kp)
{
if ((kp->ki_sostate & SS_ISCONNECTED) ||
(kp->ki_prstate >= INP_CONNECTED) ||
(kp->ki_tstate > TCPS_LISTEN) ||
(kp->ki_conn != 0))
return (1);
return (0);
}
int
islistening(struct kinfo_pcb *kp)
{
if (isconnected(kp))
return (0);
if (kp->ki_tstate == TCPS_LISTEN)
return (1);
switch (kp->ki_family) {
case PF_INET:
if (kp->ki_type == SOCK_RAW ||
(kp->ki_type == SOCK_DGRAM &&
ntohs(satosin(&kp->ki_src)->sin_port) != 0))
return (1);
break;
#ifdef INET6
case PF_INET6:
if (kp->ki_type == SOCK_RAW ||
(kp->ki_type == SOCK_DGRAM &&
ntohs(satosin6(&kp->ki_src)->sin6_port) != 0))
return (1);
break;
#endif
case PF_LOCAL:
if (satosun(&kp->ki_src)->sun_path[0] != '\0')
return (1);
break;
default:
break;
}
return (0);
}
struct kinfo_pcb *
pick_socket(struct kinfo_file *f)
{
struct sockitem *si;
struct kinfo_pcb *kp;
int hash;
if (f->ki_ftype != DTYPE_SOCKET)
return (NULL);
hash = (int)(f->ki_fdata % HASHSIZE);
LIST_FOREACH(si, &sockhash[hash], s_list) {
if (si->s_sock->ki_sockaddr == f->ki_fdata)
break;
}
if (si == NULL)
return (NULL);
kp = si->s_sock;
if (only) {
if (isconnected(kp)) {
/*
* connected but you didn't say you wanted
* connected sockets
*/
if (!(only & ONLY_CONNECTED))
return (NULL);
}
else if (islistening(kp)) {
/*
* listening but you didn't ask for listening
* sockets
*/
if (!(only & ONLY_LISTEN))
return (NULL);
}
else
/*
* neither connected nor listening, so you
* don't get it
*/
return (NULL);
}
if (portmap) {
switch (kp->ki_family) {
case AF_INET:
if (!bit_test(portmap,
ntohs(satosin(&kp->ki_src)->sin_port)) &&
!bit_test(portmap,
ntohs(satosin(&kp->ki_dst)->sin_port)))
return (NULL);
break;
#ifdef INET6
case AF_INET6:
if (!bit_test(portmap,
ntohs(satosin6(&kp->ki_src)->sin6_port)) &&
!bit_test(portmap,
ntohs(satosin6(&kp->ki_dst)->sin6_port)))
return (NULL);
break;
#endif
default:
return (NULL);
}
}
return (kp);
}
int
get_proc(struct kinfo_proc2 *p, int pid)
{
int name[6];
u_int namelen;
size_t sz;
if (p->p_pid == pid)
return (0);
sz = sizeof(*p);
namelen = 0;
name[namelen++] = CTL_KERN;
name[namelen++] = KERN_PROC2;
name[namelen++] = KERN_PROC_PID;
name[namelen++] = pid;
name[namelen++] = sz;
name[namelen++] = 1;
return (prog_sysctl(&name[0], namelen, p, &sz, NULL, 0));
}
int
print_socket(struct kinfo_file *kf, struct kinfo_pcb *kp, struct kinfo_proc2 *p)
{
static int first = 1;
struct passwd *pw;
const char *t;
char proto[22];
if (first) {
printf("%-8s " "%-10s " "%-5s " "%-2s " "%-6s "
"%-21s " "%s\n",
"USER", "COMMAND", "PID", "FD", "PROTO",
"LOCAL ADDRESS", "FOREIGN ADDRESS");
first = 0;
}
if ((pw = getpwuid(p->p_uid)) != NULL)
printf("%-8s ", pw->pw_name);
else
printf("%-8d ", (int)p->p_uid);
printf("%-10.10s ", p->p_comm);
printf("%-5d ", (int)kf->ki_pid);
printf("%2d ", (int)kf->ki_fd);
snprintf(proto, sizeof(proto), "%d/%d", kp->ki_family, kp->ki_protocol);
switch (kp->ki_family) {
case PF_INET:
switch (kp->ki_protocol) {
case IPPROTO_TCP: t = "tcp"; break;
case IPPROTO_UDP: t = "udp"; break;
case IPPROTO_RAW: t = "raw"; break;
default: t = proto; break;
}
break;
#ifdef INET6
case PF_INET6:
switch (kp->ki_protocol) {
case IPPROTO_TCP: t = "tcp6"; break;
case IPPROTO_UDP: t = "udp6"; break;
case IPPROTO_RAW: t = "raw6"; break;
default: t = proto; break;
}
break;
#endif
case PF_LOCAL:
switch (kp->ki_type) {
case SOCK_STREAM: t = "stream"; break;
case SOCK_DGRAM: t = "dgram"; break;
case SOCK_RAW: t = "raw"; break;
case SOCK_RDM: t = "rdm"; break;
case SOCK_SEQPACKET: t = "seq"; break;
default: t = proto; break;
}
break;
default:
snprintf(proto, sizeof(proto), "%d/%d/%d",
kp->ki_family, kp->ki_type, kp->ki_protocol);
t = proto;
break;
}
printf("%-6s ", t);
/*
if (kp->ki_family == PF_LOCAL) {
if (kp->ki_src.sa_len > 2) {
print_addr(0, kp->ki_type, kp->ki_pflags, &kp->ki_src);
if (kp->ki_dst.sa_family == PF_LOCAL)
printf(" ");
}
if (kp->ki_dst.sa_family == PF_LOCAL)
printf("-> ");
}
else */{
print_addr(21, kp->ki_type, kp->ki_pflags, &kp->ki_src);
printf(" ");
}
if (isconnected(kp))
print_addr(0, kp->ki_type, kp->ki_pflags, &kp->ki_dst);
else if (kp->ki_family == PF_INET
#ifdef INET6
|| kp->ki_family == PF_INET6
#endif
)
printf("%-*s", 0, "*.*");
/* else if (kp->ki_src.sa_len == 2)
printf("%-*s", 0, "-"); */
else
printf("-");
printf("\n");
return (0);
}
void
print_addr(int l, int t, int f, struct sockaddr *sa)
{
char sabuf[256], pbuf[32];
int r = 0;
if (!(f & INP_ANONPORT))
f = 0;
else
f = NI_NUMERICSERV;
if (t == SOCK_DGRAM)
f |= NI_DGRAM;
if (nonames)
f |= NI_NUMERICHOST|NI_NUMERICSERV;
getnameinfo(sa, sa->sa_len, sabuf, sizeof(sabuf),
pbuf, sizeof(pbuf), f);
switch (sa->sa_family) {
case PF_UNSPEC:
r = printf("(PF_UNSPEC)");
break;
case PF_INET: {
struct sockaddr_in *si = satosin(sa);
if (si->sin_addr.s_addr != INADDR_ANY)
r = printf("%s.%s", sabuf, pbuf);
else if (ntohs(si->sin_port) != 0)
r = printf("*.%s", pbuf);
else
r = printf("*.*");
break;
}
#ifdef INET6
case PF_INET6: {
struct sockaddr_in6 *si6 = satosin6(sa);
if (!IN6_IS_ADDR_UNSPECIFIED(&si6->sin6_addr))
r = printf("%s.%s", sabuf, pbuf);
else if (ntohs(si6->sin6_port) != 0)
r = printf("*.%s", pbuf);
else
r = printf("*.*");
break;
}
#endif
case PF_LOCAL: {
struct sockaddr_un *sun = satosun(sa);
r = printf("%s", sun->sun_path);
if (r == 0)
r = printf("-");
break;
}
default:
break;
}
if (r > 0)
l -= r;
if (l > 0)
printf("%*s", l, "");
}
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