1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if 0
33 #ifndef lint
34 static char sccsid[] = "@(#)unix.c 8.1 (Berkeley) 6/6/93";
35 #endif /* not lint */
36 #endif
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
40
41 /*
42 * Display protocol blocks in the unix domain.
43 */
44 #include <sys/param.h>
45 #include <sys/queue.h>
46 #include <sys/protosw.h>
47 #include <sys/socket.h>
48 #define _WANT_SOCKET
49 #include <sys/socketvar.h>
50 #include <sys/mbuf.h>
51 #include <sys/sysctl.h>
52 #include <sys/un.h>
53 #define _WANT_UNPCB
54 #include <sys/unpcb.h>
55
56 #include <netinet/in.h>
57
58 #include <errno.h>
59 #include <err.h>
60 #include <stddef.h>
61 #include <stdint.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <stdbool.h>
65 #include <strings.h>
66 #include <kvm.h>
67 #include <libxo/xo.h>
68 #include "netstat.h"
69
70 static void unixdomainpr(struct xunpcb *, struct xsocket *);
71
72 static const char *const socktype[] =
73 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };
74
75 static int
pcblist_sysctl(int type,char ** bufp)76 pcblist_sysctl(int type, char **bufp)
77 {
78 char *buf;
79 size_t len;
80 char mibvar[sizeof "net.local.seqpacket.pcblist"];
81
82 snprintf(mibvar, sizeof(mibvar), "net.local.%s.pcblist", socktype[type]);
83
84 len = 0;
85 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
86 if (errno != ENOENT)
87 xo_warn("sysctl: %s", mibvar);
88 return (-1);
89 }
90 if ((buf = malloc(len)) == NULL) {
91 xo_warnx("malloc %lu bytes", (u_long)len);
92 return (-2);
93 }
94 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
95 xo_warn("sysctl: %s", mibvar);
96 free(buf);
97 return (-2);
98 }
99 *bufp = buf;
100 return (0);
101 }
102
103 static int
pcblist_kvm(u_long count_off,u_long gencnt_off,u_long head_off,char ** bufp)104 pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp)
105 {
106 struct unp_head head;
107 struct unpcb *unp, unp0, unp_conn;
108 u_char sun_len;
109 struct socket so;
110 struct xunpgen xug;
111 struct xunpcb xu;
112 unp_gen_t unp_gencnt;
113 u_int unp_count;
114 char *buf, *p;
115 size_t len;
116
117 if (count_off == 0 || gencnt_off == 0)
118 return (-2);
119 if (head_off == 0)
120 return (-1);
121 kread(count_off, &unp_count, sizeof(unp_count));
122 len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu);
123 if ((buf = malloc(len)) == NULL) {
124 xo_warnx("malloc %lu bytes", (u_long)len);
125 return (-2);
126 }
127 p = buf;
128
129 #define COPYOUT(obj, size) do { \
130 if (len < (size)) { \
131 xo_warnx("buffer size exceeded"); \
132 goto fail; \
133 } \
134 bcopy((obj), p, (size)); \
135 len -= (size); \
136 p += (size); \
137 } while (0)
138
139 #define KREAD(off, buf, len) do { \
140 if (kread((uintptr_t)(off), (buf), (len)) != 0) \
141 goto fail; \
142 } while (0)
143
144 /* Write out header. */
145 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt));
146 xug.xug_len = sizeof xug;
147 xug.xug_count = unp_count;
148 xug.xug_gen = unp_gencnt;
149 xug.xug_sogen = 0;
150 COPYOUT(&xug, sizeof xug);
151
152 /* Walk the PCB list. */
153 xu.xu_len = sizeof xu;
154 KREAD(head_off, &head, sizeof(head));
155 LIST_FOREACH(unp, &head, unp_link) {
156 xu.xu_unpp = (uintptr_t)unp;
157 KREAD(unp, &unp0, sizeof (*unp));
158 unp = &unp0;
159
160 if (unp->unp_gencnt > unp_gencnt)
161 continue;
162 if (unp->unp_addr != NULL) {
163 KREAD(unp->unp_addr, &sun_len, sizeof(sun_len));
164 KREAD(unp->unp_addr, &xu.xu_addr, sun_len);
165 }
166 if (unp->unp_conn != NULL) {
167 KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn));
168 if (unp_conn.unp_addr != NULL) {
169 KREAD(unp_conn.unp_addr, &sun_len,
170 sizeof(sun_len));
171 KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len);
172 }
173 }
174 KREAD(unp->unp_socket, &so, sizeof(so));
175 if (sotoxsocket(&so, &xu.xu_socket) != 0)
176 goto fail;
177 COPYOUT(&xu, sizeof(xu));
178 }
179
180 /* Reread the counts and write the footer. */
181 kread(count_off, &unp_count, sizeof(unp_count));
182 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt));
183 xug.xug_count = unp_count;
184 xug.xug_gen = unp_gencnt;
185 COPYOUT(&xug, sizeof xug);
186
187 *bufp = buf;
188 return (0);
189
190 fail:
191 free(buf);
192 return (-1);
193 #undef COPYOUT
194 #undef KREAD
195 }
196
197 void
unixpr(u_long count_off,u_long gencnt_off,u_long dhead_off,u_long shead_off,u_long sphead_off,bool * first)198 unixpr(u_long count_off, u_long gencnt_off, u_long dhead_off, u_long shead_off,
199 u_long sphead_off, bool *first)
200 {
201 char *buf;
202 int ret, type;
203 struct xsocket *so;
204 struct xunpgen *xug, *oxug;
205 struct xunpcb *xunp;
206 u_long head_off;
207
208 buf = NULL;
209 for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) {
210 if (live)
211 ret = pcblist_sysctl(type, &buf);
212 else {
213 head_off = 0;
214 switch (type) {
215 case SOCK_STREAM:
216 head_off = shead_off;
217 break;
218
219 case SOCK_DGRAM:
220 head_off = dhead_off;
221 break;
222
223 case SOCK_SEQPACKET:
224 head_off = sphead_off;
225 break;
226 }
227 ret = pcblist_kvm(count_off, gencnt_off, head_off,
228 &buf);
229 }
230 if (ret == -1)
231 continue;
232 if (ret < 0)
233 return;
234
235 oxug = xug = (struct xunpgen *)buf;
236 for (xug = (struct xunpgen *)((char *)xug + xug->xug_len);
237 xug->xug_len > sizeof(struct xunpgen);
238 xug = (struct xunpgen *)((char *)xug + xug->xug_len)) {
239 xunp = (struct xunpcb *)xug;
240 so = &xunp->xu_socket;
241
242 /* Ignore PCBs which were freed during copyout. */
243 if (xunp->unp_gencnt > oxug->xug_gen)
244 continue;
245 if (*first) {
246 xo_open_list("socket");
247 *first = false;
248 }
249 xo_open_instance("socket");
250 unixdomainpr(xunp, so);
251 xo_close_instance("socket");
252 }
253 if (xug != oxug && xug->xug_gen != oxug->xug_gen) {
254 if (oxug->xug_count > xug->xug_count) {
255 xo_emit("Some {:type/%s} sockets may have "
256 "been {:action/deleted}.\n",
257 socktype[type]);
258 } else if (oxug->xug_count < xug->xug_count) {
259 xo_emit("Some {:type/%s} sockets may have "
260 "been {:action/created}.\n",
261 socktype[type]);
262 } else {
263 xo_emit("Some {:type/%s} sockets may have "
264 "been {:action/created or deleted}",
265 socktype[type]);
266 }
267 }
268 free(buf);
269 }
270 }
271
272 static void
unixdomainpr(struct xunpcb * xunp,struct xsocket * so)273 unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
274 {
275 struct sockaddr_un *sa;
276 static int first = 1;
277 char buf1[33];
278 static const char *titles[2] = {
279 "{T:/%-8.8s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%8.8s} "
280 "{T:/%8.8s} {T:/%8.8s} {T:/%8.8s} {T:Addr}\n",
281 "{T:/%-16.16s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%16.16s} "
282 "{T:/%16.16s} {T:/%16.16s} {T:/%16.16s} {T:Addr}\n"
283 };
284 static const char *format[2] = {
285 "{q:address/%8lx} {t:type/%-6.6s} "
286 "{:receive-bytes-waiting/%6u} "
287 "{:send-bytes-waiting/%6u} "
288 "{q:vnode/%8lx} {q:connection/%8lx} "
289 "{q:first-reference/%8lx} {q:next-reference/%8lx}",
290 "{q:address/%16lx} {t:type/%-6.6s} "
291 "{:receive-bytes-waiting/%6u} "
292 "{:send-bytes-waiting/%6u} "
293 "{q:vnode/%16lx} {q:connection/%16lx} "
294 "{q:first-reference/%16lx} {q:next-reference/%16lx}"
295 };
296 int fmt = (sizeof(void *) == 8) ? 1 : 0;
297
298 sa = (xunp->xu_addr.sun_family == AF_UNIX) ? &xunp->xu_addr : NULL;
299
300 if (first && !Lflag) {
301 xo_emit("{T:Active UNIX domain sockets}\n");
302 xo_emit(titles[fmt],
303 "Address", "Type", "Recv-Q", "Send-Q",
304 "Inode", "Conn", "Refs", "Nextref");
305 first = 0;
306 }
307
308 if (Lflag && so->so_qlimit == 0)
309 return;
310
311 if (Lflag) {
312 snprintf(buf1, sizeof buf1, "%u/%u/%u", so->so_qlen,
313 so->so_incqlen, so->so_qlimit);
314 xo_emit("unix {d:socket/%-32.32s}{e:queue-length/%u}"
315 "{e:incomplete-queue-length/%u}{e:queue-limit/%u}",
316 buf1, so->so_qlen, so->so_incqlen, so->so_qlimit);
317 } else {
318 xo_emit(format[fmt],
319 (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc,
320 so->so_snd.sb_cc, (long)xunp->unp_vnode,
321 (long)xunp->unp_conn, (long)xunp->xu_firstref,
322 (long)xunp->xu_nextref);
323 }
324 if (sa)
325 xo_emit(" {:path/%.*s}",
326 (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)),
327 sa->sun_path);
328 xo_emit("\n");
329 }
330