8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
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 = 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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