330 lines
8.8 KiB
C
330 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. 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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* 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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)unix.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Display protocol blocks in the unix domain.
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#define _WANT_SOCKET
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#include <sys/socketvar.h>
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#include <sys/mbuf.h>
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#include <sys/sysctl.h>
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#include <sys/un.h>
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#define _WANT_UNPCB
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#include <sys/unpcb.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <err.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <strings.h>
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#include <kvm.h>
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#include <libxo/xo.h>
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#include "netstat.h"
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static void unixdomainpr(struct xunpcb *, struct xsocket *);
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static const char *const socktype[] =
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{ "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };
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static int
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pcblist_sysctl(int type, char **bufp)
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{
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char *buf;
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size_t len;
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char mibvar[sizeof "net.local.seqpacket.pcblist"];
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snprintf(mibvar, sizeof(mibvar), "net.local.%s.pcblist", socktype[type]);
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len = 0;
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if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
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if (errno != ENOENT)
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xo_warn("sysctl: %s", mibvar);
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return (-1);
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}
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if ((buf = malloc(len)) == NULL) {
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xo_warnx("malloc %lu bytes", (u_long)len);
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return (-2);
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}
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if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
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xo_warn("sysctl: %s", mibvar);
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free(buf);
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return (-2);
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}
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*bufp = buf;
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return (0);
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}
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static int
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pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp)
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{
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struct unp_head head;
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struct unpcb *unp, unp0, unp_conn;
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u_char sun_len;
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struct socket so;
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struct xunpgen xug;
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struct xunpcb xu;
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unp_gen_t unp_gencnt;
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u_int unp_count;
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char *buf, *p;
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size_t len;
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if (count_off == 0 || gencnt_off == 0)
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return (-2);
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if (head_off == 0)
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return (-1);
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kread(count_off, &unp_count, sizeof(unp_count));
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len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu);
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if ((buf = malloc(len)) == NULL) {
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xo_warnx("malloc %lu bytes", (u_long)len);
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return (-2);
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}
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p = buf;
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#define COPYOUT(obj, size) do { \
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if (len < (size)) { \
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xo_warnx("buffer size exceeded"); \
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goto fail; \
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} \
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bcopy((obj), p, (size)); \
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len -= (size); \
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p += (size); \
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} while (0)
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#define KREAD(off, buf, len) do { \
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if (kread((uintptr_t)(off), (buf), (len)) != 0) \
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goto fail; \
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} while (0)
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/* Write out header. */
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kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt));
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xug.xug_len = sizeof xug;
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xug.xug_count = unp_count;
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xug.xug_gen = unp_gencnt;
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xug.xug_sogen = 0;
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COPYOUT(&xug, sizeof xug);
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/* Walk the PCB list. */
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xu.xu_len = sizeof xu;
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KREAD(head_off, &head, sizeof(head));
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LIST_FOREACH(unp, &head, unp_link) {
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xu.xu_unpp = (uintptr_t)unp;
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KREAD(unp, &unp0, sizeof (*unp));
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unp = &unp0;
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if (unp->unp_gencnt > unp_gencnt)
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continue;
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if (unp->unp_addr != NULL) {
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KREAD(unp->unp_addr, &sun_len, sizeof(sun_len));
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KREAD(unp->unp_addr, &xu.xu_addr, sun_len);
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}
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if (unp->unp_conn != NULL) {
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KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn));
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if (unp_conn.unp_addr != NULL) {
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KREAD(unp_conn.unp_addr, &sun_len,
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sizeof(sun_len));
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KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len);
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}
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}
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KREAD(unp->unp_socket, &so, sizeof(so));
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if (sotoxsocket(&so, &xu.xu_socket) != 0)
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goto fail;
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COPYOUT(&xu, sizeof(xu));
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}
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/* Reread the counts and write the footer. */
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kread(count_off, &unp_count, sizeof(unp_count));
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kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt));
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xug.xug_count = unp_count;
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xug.xug_gen = unp_gencnt;
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COPYOUT(&xug, sizeof xug);
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*bufp = buf;
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return (0);
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fail:
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free(buf);
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return (-1);
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#undef COPYOUT
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#undef KREAD
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}
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void
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unixpr(u_long count_off, u_long gencnt_off, u_long dhead_off, u_long shead_off,
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u_long sphead_off, bool *first)
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{
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char *buf;
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int ret, type;
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struct xsocket *so;
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struct xunpgen *xug, *oxug;
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struct xunpcb *xunp;
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u_long head_off;
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buf = NULL;
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for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) {
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if (live)
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ret = pcblist_sysctl(type, &buf);
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else {
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head_off = 0;
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switch (type) {
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case SOCK_STREAM:
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head_off = shead_off;
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break;
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case SOCK_DGRAM:
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head_off = dhead_off;
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break;
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case SOCK_SEQPACKET:
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head_off = sphead_off;
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break;
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}
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ret = pcblist_kvm(count_off, gencnt_off, head_off,
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&buf);
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}
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if (ret == -1)
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continue;
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if (ret < 0)
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return;
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oxug = xug = (struct xunpgen *)buf;
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for (xug = (struct xunpgen *)((char *)xug + xug->xug_len);
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xug->xug_len > sizeof(struct xunpgen);
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xug = (struct xunpgen *)((char *)xug + xug->xug_len)) {
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xunp = (struct xunpcb *)xug;
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so = &xunp->xu_socket;
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/* Ignore PCBs which were freed during copyout. */
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if (xunp->unp_gencnt > oxug->xug_gen)
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continue;
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if (*first) {
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xo_open_list("socket");
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*first = false;
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}
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xo_open_instance("socket");
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unixdomainpr(xunp, so);
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xo_close_instance("socket");
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}
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if (xug != oxug && xug->xug_gen != oxug->xug_gen) {
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if (oxug->xug_count > xug->xug_count) {
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xo_emit("Some {:type/%s} sockets may have "
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"been {:action/deleted}.\n",
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socktype[type]);
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} else if (oxug->xug_count < xug->xug_count) {
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xo_emit("Some {:type/%s} sockets may have "
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"been {:action/created}.\n",
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socktype[type]);
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} else {
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xo_emit("Some {:type/%s} sockets may have "
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"been {:action/created or deleted}",
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socktype[type]);
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}
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}
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free(buf);
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}
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}
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static void
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unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
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{
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struct sockaddr_un *sa;
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static int first = 1;
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char buf1[33];
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static const char *titles[2] = {
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"{T:/%-8.8s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%8.8s} "
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"{T:/%8.8s} {T:/%8.8s} {T:/%8.8s} {T:Addr}\n",
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"{T:/%-16.16s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%16.16s} "
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"{T:/%16.16s} {T:/%16.16s} {T:/%16.16s} {T:Addr}\n"
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};
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static const char *format[2] = {
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"{q:address/%8lx} {t:type/%-6.6s} "
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"{:receive-bytes-waiting/%6u} "
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"{:send-bytes-waiting/%6u} "
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"{q:vnode/%8lx} {q:connection/%8lx} "
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"{q:first-reference/%8lx} {q:next-reference/%8lx}",
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"{q:address/%16lx} {t:type/%-6.6s} "
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"{:receive-bytes-waiting/%6u} "
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"{:send-bytes-waiting/%6u} "
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"{q:vnode/%16lx} {q:connection/%16lx} "
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"{q:first-reference/%16lx} {q:next-reference/%16lx}"
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};
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int fmt = (sizeof(void *) == 8) ? 1 : 0;
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sa = (xunp->xu_addr.sun_family == AF_UNIX) ? &xunp->xu_addr : NULL;
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if (first && !Lflag) {
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xo_emit("{T:Active UNIX domain sockets}\n");
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xo_emit(titles[fmt],
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"Address", "Type", "Recv-Q", "Send-Q",
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"Inode", "Conn", "Refs", "Nextref");
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first = 0;
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}
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if (Lflag && so->so_qlimit == 0)
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return;
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if (Lflag) {
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snprintf(buf1, sizeof buf1, "%u/%u/%u", so->so_qlen,
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so->so_incqlen, so->so_qlimit);
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xo_emit("unix {d:socket/%-32.32s}{e:queue-length/%u}"
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"{e:incomplete-queue-length/%u}{e:queue-limit/%u}",
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buf1, so->so_qlen, so->so_incqlen, so->so_qlimit);
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} else {
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xo_emit(format[fmt],
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(long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc,
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so->so_snd.sb_cc, (long)xunp->unp_vnode,
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(long)xunp->unp_conn, (long)xunp->xu_firstref,
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(long)xunp->xu_nextref);
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}
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if (sa)
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xo_emit(" {:path/%.*s}",
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(int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)),
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sa->sun_path);
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xo_emit("\n");
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}
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