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 /* 40 * Display protocol blocks in the unix domain. 41 */ 42 #include <sys/param.h> 43 #include <sys/queue.h> 44 #include <sys/protosw.h> 45 #include <sys/socket.h> 46 #define _WANT_SOCKET 47 #include <sys/socketvar.h> 48 #include <sys/mbuf.h> 49 #include <sys/sysctl.h> 50 #include <sys/un.h> 51 #define _WANT_UNPCB 52 #include <sys/unpcb.h> 53 54 #include <netinet/in.h> 55 56 #include <errno.h> 57 #include <err.h> 58 #include <stddef.h> 59 #include <stdint.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <stdbool.h> 63 #include <strings.h> 64 #include <kvm.h> 65 #include <libxo/xo.h> 66 #include "netstat.h" 67 68 static void unixdomainpr(struct xunpcb *, struct xsocket *); 69 70 static const char *const socktype[] = 71 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" }; 72 73 static int 74 pcblist_sysctl(int type, char **bufp) 75 { 76 char *buf; 77 size_t len; 78 char mibvar[sizeof "net.local.seqpacket.pcblist"]; 79 80 snprintf(mibvar, sizeof(mibvar), "net.local.%s.pcblist", socktype[type]); 81 82 len = 0; 83 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) { 84 if (errno != ENOENT) 85 xo_warn("sysctl: %s", mibvar); 86 return (-1); 87 } 88 if ((buf = malloc(len)) == NULL) { 89 xo_warnx("malloc %lu bytes", (u_long)len); 90 return (-2); 91 } 92 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) { 93 xo_warn("sysctl: %s", mibvar); 94 free(buf); 95 return (-2); 96 } 97 *bufp = buf; 98 return (0); 99 } 100 101 static int 102 pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp) 103 { 104 struct unp_head head; 105 struct unpcb *unp, unp0, unp_conn; 106 u_char sun_len; 107 struct socket so; 108 struct xunpgen xug; 109 struct xunpcb xu; 110 unp_gen_t unp_gencnt; 111 u_int unp_count; 112 char *buf, *p; 113 size_t len; 114 115 if (count_off == 0 || gencnt_off == 0) 116 return (-2); 117 if (head_off == 0) 118 return (-1); 119 kread(count_off, &unp_count, sizeof(unp_count)); 120 len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu); 121 if ((buf = malloc(len)) == NULL) { 122 xo_warnx("malloc %lu bytes", (u_long)len); 123 return (-2); 124 } 125 p = buf; 126 127 #define COPYOUT(obj, size) do { \ 128 if (len < (size)) { \ 129 xo_warnx("buffer size exceeded"); \ 130 goto fail; \ 131 } \ 132 bcopy((obj), p, (size)); \ 133 len -= (size); \ 134 p += (size); \ 135 } while (0) 136 137 #define KREAD(off, buf, len) do { \ 138 if (kread((uintptr_t)(off), (buf), (len)) != 0) \ 139 goto fail; \ 140 } while (0) 141 142 /* Write out header. */ 143 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 144 xug.xug_len = sizeof xug; 145 xug.xug_count = unp_count; 146 xug.xug_gen = unp_gencnt; 147 xug.xug_sogen = 0; 148 COPYOUT(&xug, sizeof xug); 149 150 /* Walk the PCB list. */ 151 xu.xu_len = sizeof xu; 152 KREAD(head_off, &head, sizeof(head)); 153 LIST_FOREACH(unp, &head, unp_link) { 154 xu.xu_unpp = (uintptr_t)unp; 155 KREAD(unp, &unp0, sizeof (*unp)); 156 unp = &unp0; 157 158 if (unp->unp_gencnt > unp_gencnt) 159 continue; 160 if (unp->unp_addr != NULL) { 161 KREAD(unp->unp_addr, &sun_len, sizeof(sun_len)); 162 KREAD(unp->unp_addr, &xu.xu_addr, sun_len); 163 } 164 if (unp->unp_conn != NULL) { 165 KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn)); 166 if (unp_conn.unp_addr != NULL) { 167 KREAD(unp_conn.unp_addr, &sun_len, 168 sizeof(sun_len)); 169 KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len); 170 } 171 } 172 KREAD(unp->unp_socket, &so, sizeof(so)); 173 if (sotoxsocket(&so, &xu.xu_socket) != 0) 174 goto fail; 175 COPYOUT(&xu, sizeof(xu)); 176 } 177 178 /* Reread the counts and write the footer. */ 179 kread(count_off, &unp_count, sizeof(unp_count)); 180 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 181 xug.xug_count = unp_count; 182 xug.xug_gen = unp_gencnt; 183 COPYOUT(&xug, sizeof xug); 184 185 *bufp = buf; 186 return (0); 187 188 fail: 189 free(buf); 190 return (-1); 191 #undef COPYOUT 192 #undef KREAD 193 } 194 195 void 196 unixpr(u_long count_off, u_long gencnt_off, u_long dhead_off, u_long shead_off, 197 u_long sphead_off, bool *first) 198 { 199 char *buf; 200 int ret, type; 201 struct xsocket *so; 202 struct xunpgen *xug, *oxug; 203 struct xunpcb *xunp; 204 u_long head_off; 205 206 buf = NULL; 207 for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) { 208 if (live) 209 ret = pcblist_sysctl(type, &buf); 210 else { 211 head_off = 0; 212 switch (type) { 213 case SOCK_STREAM: 214 head_off = shead_off; 215 break; 216 217 case SOCK_DGRAM: 218 head_off = dhead_off; 219 break; 220 221 case SOCK_SEQPACKET: 222 head_off = sphead_off; 223 break; 224 } 225 ret = pcblist_kvm(count_off, gencnt_off, head_off, 226 &buf); 227 } 228 if (ret == -1) 229 continue; 230 if (ret < 0) 231 return; 232 233 oxug = xug = (struct xunpgen *)buf; 234 for (xug = (struct xunpgen *)((char *)xug + xug->xug_len); 235 xug->xug_len > sizeof(struct xunpgen); 236 xug = (struct xunpgen *)((char *)xug + xug->xug_len)) { 237 xunp = (struct xunpcb *)xug; 238 so = &xunp->xu_socket; 239 240 /* Ignore PCBs which were freed during copyout. */ 241 if (xunp->unp_gencnt > oxug->xug_gen) 242 continue; 243 if (*first) { 244 xo_open_list("socket"); 245 *first = false; 246 } 247 xo_open_instance("socket"); 248 unixdomainpr(xunp, so); 249 xo_close_instance("socket"); 250 } 251 if (xug != oxug && xug->xug_gen != oxug->xug_gen) { 252 if (oxug->xug_count > xug->xug_count) { 253 xo_emit("Some {:type/%s} sockets may have " 254 "been {:action/deleted}.\n", 255 socktype[type]); 256 } else if (oxug->xug_count < xug->xug_count) { 257 xo_emit("Some {:type/%s} sockets may have " 258 "been {:action/created}.\n", 259 socktype[type]); 260 } else { 261 xo_emit("Some {:type/%s} sockets may have " 262 "been {:action/created or deleted}", 263 socktype[type]); 264 } 265 } 266 free(buf); 267 } 268 } 269 270 static void 271 unixdomainpr(struct xunpcb *xunp, struct xsocket *so) 272 { 273 struct sockaddr_un *sa; 274 static int first = 1; 275 char buf1[33]; 276 static const char *titles[2] = { 277 "{T:/%-8.8s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%8.8s} " 278 "{T:/%8.8s} {T:/%8.8s} {T:/%8.8s} {T:Addr}\n", 279 "{T:/%-16.16s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%16.16s} " 280 "{T:/%16.16s} {T:/%16.16s} {T:/%16.16s} {T:Addr}\n" 281 }; 282 static const char *format[2] = { 283 "{q:address/%8lx} {t:type/%-6.6s} " 284 "{:receive-bytes-waiting/%6u} " 285 "{:send-bytes-waiting/%6u} " 286 "{q:vnode/%8lx} {q:connection/%8lx} " 287 "{q:first-reference/%8lx} {q:next-reference/%8lx}", 288 "{q:address/%16lx} {t:type/%-6.6s} " 289 "{:receive-bytes-waiting/%6u} " 290 "{:send-bytes-waiting/%6u} " 291 "{q:vnode/%16lx} {q:connection/%16lx} " 292 "{q:first-reference/%16lx} {q:next-reference/%16lx}" 293 }; 294 int fmt = (sizeof(void *) == 8) ? 1 : 0; 295 296 sa = (xunp->xu_addr.sun_family == AF_UNIX) ? &xunp->xu_addr : NULL; 297 298 if (first && !Lflag) { 299 xo_emit("{T:Active UNIX domain sockets}\n"); 300 xo_emit(titles[fmt], 301 "Address", "Type", "Recv-Q", "Send-Q", 302 "Inode", "Conn", "Refs", "Nextref"); 303 first = 0; 304 } 305 306 if (Lflag && so->so_qlimit == 0) 307 return; 308 309 if (Lflag) { 310 snprintf(buf1, sizeof buf1, "%u/%u/%u", so->so_qlen, 311 so->so_incqlen, so->so_qlimit); 312 xo_emit("unix {d:socket/%-32.32s}{e:queue-length/%u}" 313 "{e:incomplete-queue-length/%u}{e:queue-limit/%u}", 314 buf1, so->so_qlen, so->so_incqlen, so->so_qlimit); 315 } else { 316 xo_emit(format[fmt], 317 (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc, 318 so->so_snd.sb_cc, (long)xunp->unp_vnode, 319 (long)xunp->unp_conn, (long)xunp->xu_firstref, 320 (long)xunp->xu_nextref); 321 } 322 if (sa) 323 xo_emit(" {:path/%.*s}", 324 (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)), 325 sa->sun_path); 326 xo_emit("\n"); 327 } 328