FreeBSD-5.3/usr.bin/sockstat/sockstat.c
/*-
* Copyright (c) 2002 Dag-Erling Coïdan Smørgrav
* All rights reserved.
*
* 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
* in this position and unchanged.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
__FBSDID("$FreeBSD: src/usr.bin/sockstat/sockstat.c,v 1.9.4.1 2004/09/07 07:53:38 roam Exp $");
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/file.h>
#include <sys/user.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_var.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int opt_4; /* Show IPv4 sockets */
static int opt_6; /* Show IPv6 sockets */
static int opt_c; /* Show connected sockets */
static int opt_l; /* Show listening sockets */
static int opt_u; /* Show Unix domain sockets */
static int opt_v; /* Verbose mode */
static int *ports;
#define INT_BIT (sizeof(int)*CHAR_BIT)
#define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
#define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
struct sock {
void *socket;
void *pcb;
int vflag;
int family;
int proto;
const char *protoname;
struct sockaddr_storage laddr;
struct sockaddr_storage faddr;
struct sock *next;
};
#define HASHSIZE 1009
static struct sock *sockhash[HASHSIZE];
static struct xfile *xfiles;
static int nxfiles;
static int
xprintf(const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = vprintf(fmt, ap);
va_end(ap);
if (len < 0)
err(1, "printf()");
return (len);
}
static void
parse_ports(const char *portspec)
{
const char *p, *q;
int port, end;
if (ports == NULL)
if ((ports = calloc(65536 / INT_BIT, sizeof(int))) == NULL)
err(1, "calloc()");
p = portspec;
while (*p != '\0') {
if (!isdigit(*p))
errx(1, "syntax error in port range");
for (q = p; *q != '\0' && isdigit(*q); ++q)
/* nothing */ ;
for (port = 0; p < q; ++p)
port = port * 10 + digittoint(*p);
if (port < 0 || port > 65535)
errx(1, "invalid port number");
SET_PORT(port);
switch (*p) {
case '-':
++p;
break;
case ',':
++p;
/* fall through */
case '\0':
default:
continue;
}
for (q = p; *q != '\0' && isdigit(*q); ++q)
/* nothing */ ;
for (end = 0; p < q; ++p)
end = end * 10 + digittoint(*p);
if (end < port || end > 65535)
errx(1, "invalid port number");
while (port++ < end)
SET_PORT(port);
if (*p == ',')
++p;
}
}
static void
sockaddr(struct sockaddr_storage *sa, int af, void *addr, int port)
{
struct sockaddr_in *sin4;
struct sockaddr_in6 *sin6;
bzero(sa, sizeof *sa);
switch (af) {
case AF_INET:
sin4 = (struct sockaddr_in *)sa;
sin4->sin_len = sizeof *sin4;
sin4->sin_family = af;
sin4->sin_port = port;
sin4->sin_addr = *(struct in_addr *)addr;
break;
case AF_INET6:
sin6 = (struct sockaddr_in6 *)sa;
sin6->sin6_len = sizeof *sin6;
sin6->sin6_family = af;
sin6->sin6_port = port;
sin6->sin6_addr = *(struct in6_addr *)addr;
break;
default:
abort();
}
}
static void
gather_inet(int proto)
{
struct xinpgen *xig, *exig;
struct xinpcb *xip;
struct xtcpcb *xtp;
struct inpcb *inp;
struct xsocket *so;
struct sock *sock;
const char *varname, *protoname;
size_t len, bufsize;
void *buf;
int hash, retry, vflag;
vflag = 0;
if (opt_4)
vflag |= INP_IPV4;
if (opt_6)
vflag |= INP_IPV6;
switch (proto) {
case IPPROTO_TCP:
varname = "net.inet.tcp.pcblist";
protoname = "tcp";
break;
case IPPROTO_UDP:
varname = "net.inet.udp.pcblist";
protoname = "udp";
break;
default:
abort();
}
buf = NULL;
bufsize = 8192;
retry = 5;
do {
for (;;) {
if ((buf = realloc(buf, bufsize)) == NULL)
err(1, "realloc()");
len = bufsize;
if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
break;
if (errno != ENOMEM)
err(1, "sysctlbyname()");
bufsize *= 2;
}
xig = (struct xinpgen *)buf;
exig = (struct xinpgen *)(void *)
((char *)buf + len - sizeof *exig);
if (xig->xig_len != sizeof *xig ||
exig->xig_len != sizeof *exig)
errx(1, "struct xinpgen size mismatch");
} while (xig->xig_gen != exig->xig_gen && retry--);
if (xig->xig_gen != exig->xig_gen && opt_v)
warnx("warning: data may be inconsistent");
for (;;) {
xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
if (xig >= exig)
break;
switch (proto) {
case IPPROTO_TCP:
xtp = (struct xtcpcb *)xig;
if (xtp->xt_len != sizeof *xtp) {
warnx("struct xtcpcb size mismatch");
goto out;
}
inp = &xtp->xt_inp;
so = &xtp->xt_socket;
break;
case IPPROTO_UDP:
xip = (struct xinpcb *)xig;
if (xip->xi_len != sizeof *xip) {
warnx("struct xinpcb size mismatch");
goto out;
}
inp = &xip->xi_inp;
so = &xip->xi_socket;
break;
default:
abort();
}
if ((inp->inp_vflag & vflag) == 0)
continue;
if (inp->inp_vflag & INP_IPV4) {
if ((inp->inp_fport == 0 && !opt_l) ||
(inp->inp_fport != 0 && !opt_c))
continue;
} else if (inp->inp_vflag & INP_IPV6) {
if ((inp->in6p_fport == 0 && !opt_l) ||
(inp->in6p_fport != 0 && !opt_c))
continue;
} else {
if (opt_v)
warnx("invalid vflag 0x%x", inp->inp_vflag);
free(sock);
continue;
}
if ((sock = calloc(1, sizeof *sock)) == NULL)
err(1, "malloc()");
sock->socket = so->xso_so;
sock->proto = proto;
if (inp->inp_vflag & INP_IPV4) {
sock->family = AF_INET;
sockaddr(&sock->laddr, sock->family,
&inp->inp_laddr, inp->inp_lport);
sockaddr(&sock->faddr, sock->family,
&inp->inp_faddr, inp->inp_fport);
} else if (inp->inp_vflag & INP_IPV6) {
sock->family = AF_INET6;
sockaddr(&sock->laddr, sock->family,
&inp->in6p_laddr, inp->in6p_lport);
sockaddr(&sock->faddr, sock->family,
&inp->in6p_faddr, inp->in6p_fport);
}
sock->vflag = inp->inp_vflag;
sock->protoname = protoname;
hash = (int)((uintptr_t)sock->socket % HASHSIZE);
sock->next = sockhash[hash];
sockhash[hash] = sock;
}
out:
free(buf);
}
static void
gather_unix(int proto)
{
struct xunpgen *xug, *exug;
struct xunpcb *xup;
struct sock *sock;
const char *varname, *protoname;
size_t len, bufsize;
void *buf;
int hash, retry;
switch (proto) {
case SOCK_STREAM:
varname = "net.local.stream.pcblist";
protoname = "stream";
break;
case SOCK_DGRAM:
varname = "net.local.dgram.pcblist";
protoname = "dgram";
break;
default:
abort();
}
buf = NULL;
bufsize = 8192;
retry = 5;
do {
for (;;) {
if ((buf = realloc(buf, bufsize)) == NULL)
err(1, "realloc()");
len = bufsize;
if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
break;
if (errno != ENOMEM)
err(1, "sysctlbyname()");
bufsize *= 2;
}
xug = (struct xunpgen *)buf;
exug = (struct xunpgen *)(void *)
((char *)buf + len - sizeof *exug);
if (xug->xug_len != sizeof *xug ||
exug->xug_len != sizeof *exug) {
warnx("struct xinpgen size mismatch");
goto out;
}
} while (xug->xug_gen != exug->xug_gen && retry--);
if (xug->xug_gen != exug->xug_gen && opt_v)
warnx("warning: data may be inconsistent");
for (;;) {
xug = (struct xunpgen *)(void *)((char *)xug + xug->xug_len);
if (xug >= exug)
break;
xup = (struct xunpcb *)xug;
if (xup->xu_len != sizeof *xup) {
warnx("struct xunpcb size mismatch");
goto out;
}
if ((xup->xu_unp.unp_conn == NULL && !opt_l) ||
(xup->xu_unp.unp_conn != NULL && !opt_c))
continue;
if ((sock = calloc(1, sizeof *sock)) == NULL)
err(1, "malloc()");
sock->socket = xup->xu_socket.xso_so;
sock->pcb = xup->xu_unpp;
sock->proto = proto;
sock->family = AF_UNIX;
sock->protoname = protoname;
if (xup->xu_unp.unp_addr != NULL)
sock->laddr =
*(struct sockaddr_storage *)(void *)&xup->xu_addr;
else if (xup->xu_unp.unp_conn != NULL)
*(void **)&sock->faddr = xup->xu_unp.unp_conn;
hash = (int)((uintptr_t)sock->socket % HASHSIZE);
sock->next = sockhash[hash];
sockhash[hash] = sock;
}
out:
free(buf);
}
static void
getfiles(void)
{
size_t len;
if ((xfiles = malloc(len = sizeof *xfiles)) == NULL)
err(1, "malloc()");
while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
if (errno != ENOMEM)
err(1, "sysctlbyname()");
len *= 2;
if ((xfiles = realloc(xfiles, len)) == NULL)
err(1, "realloc()");
}
if (len > 0 && xfiles->xf_size != sizeof *xfiles)
errx(1, "struct xfile size mismatch");
nxfiles = len / sizeof *xfiles;
}
static int
printaddr(int af, struct sockaddr_storage *ss)
{
char addrstr[INET6_ADDRSTRLEN] = { '\0', '\0' };
struct sockaddr_un *sun;
void *addr;
int off, port;
switch (af) {
case AF_INET:
addr = &((struct sockaddr_in *)ss)->sin_addr;
if (inet_lnaof(*(struct in_addr *)addr) == INADDR_ANY)
addrstr[0] = '*';
port = ntohs(((struct sockaddr_in *)ss)->sin_port);
break;
case AF_INET6:
addr = &((struct sockaddr_in6 *)ss)->sin6_addr;
if (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *)addr))
addrstr[0] = '*';
port = ntohs(((struct sockaddr_in6 *)ss)->sin6_port);
break;
case AF_UNIX:
sun = (struct sockaddr_un *)ss;
off = (int)((char *)&sun->sun_path - (char *)sun);
return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
}
if (addrstr[0] == '\0')
inet_ntop(af, addr, addrstr, sizeof addrstr);
if (port == 0)
return xprintf("%s:*", addrstr);
else
return xprintf("%s:%d", addrstr, port);
}
static const char *
getprocname(pid_t pid)
{
static struct kinfo_proc proc;
size_t len;
int mib[4];
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = (int)pid;
len = sizeof proc;
if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
warn("sysctl()");
return ("??");
}
return (proc.ki_ocomm);
}
static int
check_ports(struct sock *s)
{
int port;
if (ports == NULL)
return (1);
if ((s->family != AF_INET) && (s->family != AF_INET6))
return (1);
if (s->family == AF_INET)
port = ntohs(((struct sockaddr_in *)(&s->laddr))->sin_port);
else
port = ntohs(((struct sockaddr_in6 *)(&s->laddr))->sin6_port);
if (CHK_PORT(port))
return (1);
if (s->family == AF_INET)
port = ntohs(((struct sockaddr_in *)(&s->faddr))->sin_port);
else
port = ntohs(((struct sockaddr_in6 *)(&s->faddr))->sin6_port);
if (CHK_PORT(port))
return (1);
return (0);
}
static void
display(void)
{
struct passwd *pwd;
struct xfile *xf;
struct sock *s;
void *p;
int hash, n, pos;
printf("%-8s %-10s %-5s %-2s %-6s %-21s %-21s\n",
"USER", "COMMAND", "PID", "FD", "PROTO",
"LOCAL ADDRESS", "FOREIGN ADDRESS");
setpassent(1);
for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
if (xf->xf_data == NULL)
continue;
hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
for (s = sockhash[hash]; s != NULL; s = s->next)
if ((void *)s->socket == xf->xf_data)
break;
if (s == NULL)
continue;
if (!check_ports(s))
continue;
pos = 0;
if ((pwd = getpwuid(xf->xf_uid)) == NULL)
pos += xprintf("%lu", (u_long)xf->xf_uid);
else
pos += xprintf("%s", pwd->pw_name);
while (pos < 9)
pos += xprintf(" ");
pos += xprintf("%.10s", getprocname(xf->xf_pid));
while (pos < 20)
pos += xprintf(" ");
pos += xprintf("%lu", (u_long)xf->xf_pid);
while (pos < 26)
pos += xprintf(" ");
pos += xprintf("%d", xf->xf_fd);
while (pos < 29)
pos += xprintf(" ");
pos += xprintf("%s", s->protoname);
if (s->vflag & INP_IPV4)
pos += xprintf("4");
if (s->vflag & INP_IPV6)
pos += xprintf("6");
while (pos < 36)
pos += xprintf(" ");
switch (s->family) {
case AF_INET:
case AF_INET6:
pos += printaddr(s->family, &s->laddr);
while (pos < 58)
pos += xprintf(" ");
pos += printaddr(s->family, &s->faddr);
break;
case AF_UNIX:
/* server */
if (s->laddr.ss_len > 0) {
pos += printaddr(s->family, &s->laddr);
break;
}
/* client */
p = *(void **)&s->faddr;
if (p == NULL) {
pos += xprintf("(not connected)");
break;
}
pos += xprintf("-> ");
for (hash = 0; hash < HASHSIZE; ++hash) {
for (s = sockhash[hash]; s != NULL; s = s->next)
if (s->pcb == p)
break;
if (s != NULL)
break;
}
if (s == NULL || s->laddr.ss_len == 0)
pos += xprintf("??");
else
pos += printaddr(s->family, &s->laddr);
break;
default:
abort();
}
xprintf("\n");
}
}
static void
usage(void)
{
fprintf(stderr, "Usage: sockstat [-46clu] [-p ports]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int o;
while ((o = getopt(argc, argv, "46clp:uv")) != -1)
switch (o) {
case '4':
opt_4 = 1;
break;
case '6':
opt_6 = 1;
break;
case 'c':
opt_c = 1;
break;
case 'l':
opt_l = 1;
break;
case 'p':
parse_ports(optarg);
break;
case 'u':
opt_u = 1;
break;
case 'v':
++opt_v;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 0)
usage();
if (!opt_4 && !opt_6 && !opt_u)
opt_4 = opt_6 = opt_u = 1;
if (!opt_c && !opt_l)
opt_c = opt_l = 1;
if (opt_4 || opt_6) {
gather_inet(IPPROTO_TCP);
gather_inet(IPPROTO_UDP);
}
if (opt_u) {
gather_unix(SOCK_STREAM);
gather_unix(SOCK_DGRAM);
}
getfiles();
display();
exit(0);
}