Rewrite sockstat(1) in C.
Sponsored by: DARPA, NAI Labs
This commit is contained in:
Dag-Erling Smørgrav
parent
aefe27a25c
commit
ca007d9172
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=101043
@ -1,6 +1,7 @@
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# $FreeBSD$
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SCRIPTS= sockstat.pl
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PROG= sockstat
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WARNS?= 4
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MAN= sockstat.1
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.include <bsd.prog.mk>
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@ -104,18 +104,18 @@ The transport protocol associated with the socket for Internet
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sockets, or the type of socket (stream or datagram) for
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.Ux
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sockets.
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.It Li ADDRESS
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.No ( Ux
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sockets only)
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For bound sockets, this is the filename of the socket.
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For other sockets, it is the name, PID and file descriptor number of
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the peer, or
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.Dq Li "(none)"
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if the socket is neither bound nor connected.
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.It Li LOCAL ADDRESS
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(Internet sockets only)
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The address the local end of the socket is bound to (see
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For Internet sockets, this is the address the local end of the socket
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is bound to (see
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.Xr getsockname 2 ) .
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For bound
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.Ux
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sockets, it is the socket's filename.
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For other
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.Ux
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sockets, it is a right arrow followed by the endpoint's filename, or
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.Dq Li ??
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if the endpoint could not be determined.
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.It Li FOREIGN ADDRESS
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(Internet sockets only)
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The address the foreign end of the socket is bound to (see
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584
usr.bin/sockstat/sockstat.c
Normal file
584
usr.bin/sockstat/sockstat.c
Normal file
@ -0,0 +1,584 @@
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/*-
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* Copyright (c) 2002 Dag-Erling Coïdan Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/file.h>
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#include <sys/user.h>
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#include <sys/un.h>
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#include <sys/unpcb.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_seq.h>
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#include <netinet/tcp_var.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int opt_4; /* Show IPv4 sockets */
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static int opt_6; /* Show IPv6 sockets */
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static int opt_c; /* Show connected sockets */
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static int opt_l; /* Show listening sockets */
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static int opt_u; /* Show Unix domain sockets */
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static int opt_v; /* Verbose mode */
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static int *ports;
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#define INT_BIT (sizeof(int)*CHAR_BIT)
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#define SET_PORT(p) do { ports[p / INT_BIT] |= 1 << (p % INT_BIT); } while (0)
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#define CHK_PORT(p) (ports[p / INT_BIT] & (1 << (p % INT_BIT)))
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struct sock {
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void *socket;
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void *pcb;
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int vflag;
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int family;
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int proto;
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const char *protoname;
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struct sockaddr_storage laddr;
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struct sockaddr_storage faddr;
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struct sock *next;
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};
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#define HASHSIZE 1009
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static struct sock *sockhash[HASHSIZE];
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static struct xfile *xfiles;
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static int nxfiles;
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static int
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xprintf(const char *fmt, ...)
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{
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va_list ap;
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int len;
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va_start(ap, fmt);
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len = vprintf(fmt, ap);
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va_end(ap);
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if (len < 0)
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err(1, "printf()");
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return (len);
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}
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static void
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parse_ports(const char *portspec)
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{
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const char *p, *q;
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int port, end;
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if (ports == NULL)
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if ((ports = calloc(1, 65536 / INT_BIT)) == NULL)
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err(1, "calloc()");
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p = portspec;
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while (*p != '\0') {
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if (!isdigit(*p))
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errx(1, "syntax error in port range");
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for (q = p; *q != '\0' && isdigit(*q); ++q)
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/* nothing */ ;
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for (port = 0; p < q; ++p)
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port = port * 10 + digittoint(*p);
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if (port < 0 || port > 65535)
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errx(1, "invalid port number");
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SET_PORT(port);
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switch (*p) {
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case '-':
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++p;
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break;
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case ',':
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++p;
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/* fall through */
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case '\0':
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default:
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continue;
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}
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for (q = p; *q != '\0' && isdigit(*q); ++q)
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/* nothing */ ;
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for (end = 0; p < q; ++p)
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end = end * 10 + digittoint(*p);
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if (end < port || end > 65535)
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errx(1, "invalid port number");
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while (port++ < end)
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SET_PORT(port);
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if (*p == ',')
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++p;
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}
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}
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static void
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sockaddr(struct sockaddr_storage *sa, int af, void *addr, int port)
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{
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struct sockaddr_in *sin4;
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struct sockaddr_in6 *sin6;
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bzero(sa, sizeof *sa);
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switch (af) {
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case AF_INET:
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sin4 = (struct sockaddr_in *)sa;
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sin4->sin_len = sizeof *sin4;
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sin4->sin_family = af;
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sin4->sin_port = port;
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sin4->sin_addr = *(struct in_addr *)addr;
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break;
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case AF_INET6:
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sin6 = (struct sockaddr_in6 *)sa;
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sin6->sin6_len = sizeof *sin6;
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sin6->sin6_family = af;
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sin6->sin6_port = port;
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sin6->sin6_addr = *(struct in6_addr *)addr;
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break;
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default:
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abort();
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}
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}
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static void
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gather_inet(int proto)
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{
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struct xinpgen *xig, *exig;
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struct xinpcb *xip;
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struct xtcpcb *xtp;
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struct inpcb *inp;
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struct xsocket *so;
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struct sock *sock;
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const char *varname, *protoname;
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size_t len, bufsize;
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void *buf;
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int hash, retry, vflag;
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vflag = 0;
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if (opt_4)
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vflag |= INP_IPV4;
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if (opt_6)
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vflag |= INP_IPV6;
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switch (proto) {
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case IPPROTO_TCP:
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varname = "net.inet.tcp.pcblist";
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protoname = "tcp";
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break;
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case IPPROTO_UDP:
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varname = "net.inet.udp.pcblist";
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protoname = "udp";
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break;
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default:
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abort();
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}
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buf = NULL;
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bufsize = 8192;
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retry = 5;
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do {
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for (;;) {
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if ((buf = realloc(buf, bufsize)) == NULL)
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err(1, "realloc()");
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len = bufsize;
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if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
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break;
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if (errno != ENOMEM)
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err(1, "sysctlbyname()");
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bufsize *= 2;
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}
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xig = (struct xinpgen *)buf;
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exig = (struct xinpgen *)((char *)buf + len - sizeof *exig);
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if (xig->xig_len != sizeof *xig ||
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exig->xig_len != sizeof *exig)
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errx(1, "struct xinpgen size mismatch");
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} while (xig->xig_gen != exig->xig_gen && retry--);
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if (xig->xig_gen != exig->xig_gen && opt_v)
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warnx("warning: data may be inconsistent");
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for (;;) {
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xig = (struct xinpgen *)((char *)xig + xig->xig_len);
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if (xig >= exig)
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break;
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switch (proto) {
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case IPPROTO_TCP:
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xtp = (struct xtcpcb *)xig;
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if (xtp->xt_len != sizeof *xtp) {
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warnx("struct xtcpcb size mismatch");
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goto out;
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}
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inp = &xtp->xt_inp;
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so = &xtp->xt_socket;
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break;
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case IPPROTO_UDP:
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xip = (struct xinpcb *)xig;
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if (xip->xi_len != sizeof *xip) {
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warnx("struct xinpcb size mismatch");
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goto out;
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}
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inp = &xip->xi_inp;
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so = &xip->xi_socket;
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break;
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default:
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abort();
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}
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if ((inp->inp_vflag & vflag) == 0)
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continue;
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if ((sock = calloc(1, sizeof *sock)) == NULL)
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err(1, "malloc()");
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sock->socket = so->xso_so;
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sock->proto = proto;
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if (inp->inp_vflag & INP_IPV4) {
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sock->family = AF_INET;
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sockaddr(&sock->laddr, sock->family,
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&inp->inp_laddr, inp->inp_lport);
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sockaddr(&sock->faddr, sock->family,
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&inp->inp_faddr, inp->inp_fport);
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} else if (inp->inp_vflag & INP_IPV6) {
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sock->family = AF_INET6;
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sockaddr(&sock->laddr, sock->family,
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&inp->in6p_laddr, inp->in6p_lport);
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sockaddr(&sock->faddr, sock->family,
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&inp->in6p_faddr, inp->in6p_fport);
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} else {
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if (opt_v)
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warnx("invalid vflag 0x%x", inp->inp_vflag);
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free(sock);
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continue;
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}
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sock->vflag = inp->inp_vflag;
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sock->protoname = protoname;
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hash = (int)((uintptr_t)sock->socket % HASHSIZE);
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sock->next = sockhash[hash];
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sockhash[hash] = sock;
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}
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out:
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free(buf);
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}
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static void
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gather_unix(int proto)
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{
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struct xunpgen *xug, *exug;
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struct xunpcb *xup;
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struct sock *sock;
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const char *varname, *protoname;
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size_t len, bufsize;
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void *buf;
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int hash, retry;
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switch (proto) {
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case SOCK_STREAM:
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varname = "net.local.stream.pcblist";
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protoname = "stream";
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break;
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case SOCK_DGRAM:
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varname = "net.local.dgram.pcblist";
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protoname = "dgram";
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break;
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default:
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abort();
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}
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buf = NULL;
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bufsize = 8192;
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retry = 5;
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do {
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for (;;) {
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if ((buf = realloc(buf, bufsize)) == NULL)
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err(1, "realloc()");
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len = bufsize;
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if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
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break;
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if (errno != ENOMEM)
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err(1, "sysctlbyname()");
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bufsize *= 2;
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}
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xug = (struct xunpgen *)buf;
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exug = (struct xunpgen *)((char *)buf + len - sizeof *exug);
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if (xug->xug_len != sizeof *xug ||
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exug->xug_len != sizeof *exug) {
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warnx("struct xinpgen size mismatch");
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goto out;
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}
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} while (xug->xug_gen != exug->xug_gen && retry--);
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if (xug->xug_gen != exug->xug_gen && opt_v)
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warnx("warning: data may be inconsistent");
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for (;;) {
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xug = (struct xunpgen *)((char *)xug + xug->xug_len);
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if (xug >= exug)
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break;
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xup = (struct xunpcb *)xug;
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if (xup->xu_len != sizeof *xup) {
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warnx("struct xunpcb size mismatch");
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goto out;
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}
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if ((sock = calloc(1, sizeof *sock)) == NULL)
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err(1, "malloc()");
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sock->socket = xup->xu_socket.xso_so;
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sock->pcb = xup->xu_unpp;
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sock->proto = proto;
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sock->family = AF_UNIX;
|
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sock->protoname = protoname;
|
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if (xup->xu_unp.unp_addr != NULL)
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sock->laddr = *(struct sockaddr_storage *)&xup->xu_addr;
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else if (xup->xu_unp.unp_conn != NULL)
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*(void **)&sock->faddr = xup->xu_unp.unp_conn;
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hash = (int)((uintptr_t)sock->socket % HASHSIZE);
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sock->next = sockhash[hash];
|
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sockhash[hash] = sock;
|
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}
|
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out:
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free(buf);
|
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}
|
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|
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static void
|
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getfiles(void)
|
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{
|
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size_t len;
|
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|
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if ((xfiles = malloc(len = sizeof *xfiles)) == NULL)
|
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err(1, "malloc()");
|
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while (sysctlbyname("kern.file", xfiles, &len, 0, 0) == -1) {
|
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if (errno != ENOMEM)
|
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err(1, "sysctlbyname()");
|
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len *= 2;
|
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if ((xfiles = realloc(xfiles, len)) == NULL)
|
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err(1, "realloc()");
|
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}
|
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if (len > 0 && xfiles->xf_size != sizeof *xfiles)
|
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errx(1, "struct xfile size mismatch");
|
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nxfiles = len / sizeof *xfiles;
|
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}
|
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|
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static int
|
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printaddr(int af, struct sockaddr_storage *ss)
|
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{
|
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char addrstr[INET6_ADDRSTRLEN] = { '\0', '\0' };
|
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struct sockaddr_un *sun;
|
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void *addr;
|
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int off, port;
|
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|
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switch (af) {
|
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case AF_INET:
|
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addr = &((struct sockaddr_in *)ss)->sin_addr;
|
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if (inet_lnaof(*(struct in_addr *)addr) == INADDR_ANY)
|
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addrstr[0] = '*';
|
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port = ntohs(((struct sockaddr_in *)ss)->sin_port);
|
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break;
|
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case AF_INET6:
|
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addr = &((struct sockaddr_in6 *)ss)->sin6_addr;
|
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if (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *)addr))
|
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addrstr[0] = '*';
|
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port = ntohs(((struct sockaddr_in6 *)ss)->sin6_port);
|
||||
break;
|
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case AF_UNIX:
|
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sun = (struct sockaddr_un *)ss;
|
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off = (int)((char *)&sun->sun_path - (char *)sun);
|
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return (xprintf("%.*s", sun->sun_len - off, sun->sun_path));
|
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}
|
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if (addrstr[0] == '\0')
|
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inet_ntop(af, addr, addrstr, sizeof addrstr);
|
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if (port == 0)
|
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return xprintf("%s:*", addrstr);
|
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else
|
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return xprintf("%s:%d", addrstr, port);
|
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}
|
||||
|
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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;
|
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len = sizeof proc;
|
||||
if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
|
||||
warn("sysctl()");
|
||||
return ("??");
|
||||
}
|
||||
return (proc.ki_ocomm);
|
||||
}
|
||||
|
||||
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) {
|
||||
hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
|
||||
/*xprintf("%p %d\n", xf->xf_data, hash);*/
|
||||
for (s = sockhash[hash]; s != NULL; s = s->next)
|
||||
if (s->socket == xf->xf_data)
|
||||
break;
|
||||
if (s == NULL)
|
||||
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 */
|
||||
pos += xprintf("-> ");
|
||||
p = *(void **)&s->faddr;
|
||||
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);
|
||||
}
|
||||
@ -1,246 +0,0 @@
|
||||
#!/usr/bin/perl -w
|
||||
#-
|
||||
# Copyright (c) 1999 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.
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
|
||||
use strict;
|
||||
use Getopt::Std;
|
||||
|
||||
my %netstat;
|
||||
my %fstat;
|
||||
my $unknown = [ "?", "?", "?", "?", "?", "?", "?", "?", "?" ];
|
||||
|
||||
my $inet_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-21.21s %-21.21s\n";
|
||||
my $unix_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-43.43s\n";
|
||||
|
||||
my @ranges;
|
||||
|
||||
#
|
||||
# Parse a port range specification
|
||||
#
|
||||
sub parse_port_ranges($) {
|
||||
my $spec = shift; # Range spec
|
||||
|
||||
my $range; # Range
|
||||
my ($low, $high); # Low/high ends of range
|
||||
|
||||
foreach $range (split(/\s*,\s*/, $spec)) {
|
||||
if ($range =~ m/^(\d+)-(\d+)$/) {
|
||||
($low, $high) = ($1, $2);
|
||||
} elsif ($range =~ m/^-(\d+)$/) {
|
||||
($low, $high) = (1, $1);
|
||||
} elsif ($range =~ m/^(\d+)-$/) {
|
||||
($low, $high) = ($1, 65535);
|
||||
} elsif ($range =~ m/^(\d+)$/) {
|
||||
$low = $high = $1;
|
||||
} else {
|
||||
die("invalid range specification: $range\n");
|
||||
}
|
||||
if ($low < 0 || $low > 65535 || $high < 0 || $high > 65535) {
|
||||
die("valid ports numbers are 1-65535 inclusive\n");
|
||||
}
|
||||
if ($low > $high) {
|
||||
$low ^= $high;
|
||||
$high ^= $low;
|
||||
$low ^= $high;
|
||||
}
|
||||
push(@ranges, [ $low, $high ]);
|
||||
}
|
||||
}
|
||||
|
||||
#
|
||||
# Check if a port is in an allowed range
|
||||
#
|
||||
sub check_range($) {
|
||||
my $addr = shift; # Address to check
|
||||
|
||||
my $port; # Port number
|
||||
my $range; # Range
|
||||
|
||||
if (@ranges == 0) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
if ($addr !~ m/\.(\d+)$/) {
|
||||
return undef;
|
||||
}
|
||||
$port = $1;
|
||||
|
||||
foreach $range (@ranges) {
|
||||
if ($port >= $range->[0] && $port <= $range->[1]) {
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
return undef;
|
||||
}
|
||||
|
||||
#
|
||||
# Gather information about sockets
|
||||
#
|
||||
sub gather() {
|
||||
|
||||
local *PIPE; # Pipe
|
||||
my $pid; # Child PID
|
||||
my $line; # Input line
|
||||
my @fields; # Fields
|
||||
|
||||
# Netstat
|
||||
if (!defined($pid = open(PIPE, "-|"))) {
|
||||
die("open(netstat): $!\n");
|
||||
} elsif ($pid == 0) {
|
||||
exec("/usr/bin/netstat", "-AanW");
|
||||
die("exec(netstat): $!\n");
|
||||
}
|
||||
while ($line = <PIPE>) {
|
||||
next unless ($line =~ m/^[0-9a-f]{8} /) || ($line =~ m/^[0-9a-f]{16} /);
|
||||
chomp($line);
|
||||
@fields = split(' ', $line);
|
||||
$netstat{$fields[0]} = [ @fields ];
|
||||
}
|
||||
close(PIPE)
|
||||
or die("close(netstat): $!\n");
|
||||
|
||||
# Fstat
|
||||
if (!defined($pid = open(PIPE, "-|"))) {
|
||||
die("open(fstat): $!\n");
|
||||
} elsif ($pid == 0) {
|
||||
exec("/usr/bin/fstat");
|
||||
die("exec(fstat): $!\n");
|
||||
}
|
||||
while ($line = <PIPE>) {
|
||||
chomp($line);
|
||||
@fields = split(' ', $line);
|
||||
next if ($fields[4] eq "-");
|
||||
push(@{$fstat{$fields[4]}}, [ @fields ]);
|
||||
}
|
||||
close(PIPE)
|
||||
or die("close(fstat): $!\n");
|
||||
}
|
||||
|
||||
#
|
||||
# Replace the last dot in an "address.port" string with a colon
|
||||
#
|
||||
sub addr($) {
|
||||
my $addr = shift; # Address
|
||||
|
||||
$addr =~ s/^(.*)\.([^\.]*)$/$1:$2/;
|
||||
return $addr;
|
||||
}
|
||||
|
||||
#
|
||||
# Print information about Internet sockets
|
||||
#
|
||||
sub print_inet($$$) {
|
||||
my $af = shift; # Address family
|
||||
my $conn = shift || 0; # Show connected sockets
|
||||
my $listen = shift || 0; # Show listen sockets
|
||||
|
||||
my $fsd; # Fstat data
|
||||
my $nsd; # Netstat data
|
||||
|
||||
printf($inet_fmt, "USER", "COMMAND", "PID", "FD",
|
||||
"PROTO", "LOCAL ADDRESS", "FOREIGN ADDRESS");
|
||||
foreach $fsd (@{$fstat{$af}}) {
|
||||
next unless defined($fsd->[7]);
|
||||
$nsd = $netstat{$fsd->[7]} || $unknown;
|
||||
next unless (check_range($nsd->[4]) || check_range($nsd->[5]));
|
||||
next if (!$conn && $nsd->[5] ne '*.*');
|
||||
next if (!$listen && $nsd->[5] eq '*.*');
|
||||
printf($inet_fmt, $fsd->[0], $fsd->[1], $fsd->[2],
|
||||
substr($fsd->[3], 0, -1),
|
||||
$nsd->[1], addr($nsd->[4]), addr($nsd->[5]));
|
||||
}
|
||||
print("\n");
|
||||
}
|
||||
|
||||
#
|
||||
# Print information about Unix domain sockets
|
||||
#
|
||||
sub print_unix($$) {
|
||||
my $conn = shift || 0; # Show connected sockets
|
||||
my $listen = shift || 0; # Show listen sockets
|
||||
|
||||
my %endpoint; # Mad PCB to process/fd
|
||||
my $fsd; # Fstat data
|
||||
my $nsd; # Netstat data
|
||||
|
||||
foreach $fsd (@{$fstat{"local"}}) {
|
||||
$endpoint{$fsd->[6]} = "$fsd->[1]\[$fsd->[2]\]:" .
|
||||
substr($fsd->[3], 0, -1);
|
||||
}
|
||||
printf($unix_fmt, "USER", "COMMAND", "PID", "FD", "PROTO", "ADDRESS");
|
||||
foreach $fsd (@{$fstat{"local"}}) {
|
||||
next unless defined($fsd->[6]);
|
||||
next if (!$conn && defined($fsd->[8]));
|
||||
next if (!$listen && !defined($fsd->[8]));
|
||||
$nsd = $netstat{$fsd->[6]} || $unknown;
|
||||
printf($unix_fmt, $fsd->[0], $fsd->[1], $fsd->[2],
|
||||
substr($fsd->[3], 0, -1), $fsd->[5],
|
||||
$nsd->[8] || ($fsd->[8] ? $endpoint{$fsd->[8]} : "(none)"));
|
||||
}
|
||||
print("\n");
|
||||
}
|
||||
|
||||
#
|
||||
# Print usage message and exit
|
||||
#
|
||||
sub usage() {
|
||||
print(STDERR "usage: sockstat [-46clu] [-p ports]\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
MAIN:{
|
||||
my %opts; # Command-line options
|
||||
|
||||
getopts("46clp:u", \%opts)
|
||||
or usage();
|
||||
|
||||
gather();
|
||||
|
||||
if (!$opts{'4'} && !$opts{'6'} && !$opts{'u'}) {
|
||||
$opts{'4'} = $opts{'6'} = $opts{'u'} = 1;
|
||||
}
|
||||
if (!$opts{'c'} && !$opts{'l'}) {
|
||||
$opts{'c'} = $opts{'l'} = 1;
|
||||
}
|
||||
if ($opts{'p'}) {
|
||||
parse_port_ranges($opts{'p'});
|
||||
}
|
||||
if ($opts{'4'}) {
|
||||
print_inet("internet", $opts{'c'}, $opts{'l'});
|
||||
}
|
||||
if ($opts{'6'}) {
|
||||
print_inet("internet6", $opts{'c'}, $opts{'l'});
|
||||
}
|
||||
if ($opts{'u'}) {
|
||||
print_unix($opts{'c'}, $opts{'l'});
|
||||
}
|
||||
|
||||
exit(0);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user