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 #endif 34 35 #include <sys/cdefs.h> 36 /* 37 * Display protocol blocks in the unix domain. 38 */ 39 #include <sys/param.h> 40 #include <sys/queue.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #define _WANT_SOCKET 44 #include <sys/socketvar.h> 45 #include <sys/mbuf.h> 46 #include <sys/sysctl.h> 47 #include <sys/un.h> 48 #define _WANT_UNPCB 49 #include <sys/unpcb.h> 50 51 #include <netinet/in.h> 52 53 #include <errno.h> 54 #include <err.h> 55 #include <stddef.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <stdbool.h> 60 #include <strings.h> 61 #include <kvm.h> 62 #include <libxo/xo.h> 63 #include "netstat.h" 64 65 static void unixdomainpr(struct xunpcb *, struct xsocket *); 66 67 static const char *const socktype[] = 68 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" }; 69 70 static int 71 pcblist_sysctl(int type, char **bufp) 72 { 73 char *buf; 74 size_t len; 75 char mibvar[sizeof "net.local.seqpacket.pcblist"]; 76 77 snprintf(mibvar, sizeof(mibvar), "net.local.%s.pcblist", socktype[type]); 78 79 len = 0; 80 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) { 81 if (errno != ENOENT) 82 xo_warn("sysctl: %s", mibvar); 83 return (-1); 84 } 85 if ((buf = malloc(len)) == NULL) { 86 xo_warnx("malloc %lu bytes", (u_long)len); 87 return (-2); 88 } 89 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) { 90 xo_warn("sysctl: %s", mibvar); 91 free(buf); 92 return (-2); 93 } 94 *bufp = buf; 95 return (0); 96 } 97 98 static int 99 pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp) 100 { 101 struct unp_head head; 102 struct unpcb *unp, unp0, unp_conn; 103 u_char sun_len; 104 struct socket so; 105 struct xunpgen xug; 106 struct xunpcb xu; 107 unp_gen_t unp_gencnt; 108 u_int unp_count; 109 char *buf, *p; 110 size_t len; 111 112 if (count_off == 0 || gencnt_off == 0) 113 return (-2); 114 if (head_off == 0) 115 return (-1); 116 kread(count_off, &unp_count, sizeof(unp_count)); 117 len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu); 118 if ((buf = malloc(len)) == NULL) { 119 xo_warnx("malloc %lu bytes", (u_long)len); 120 return (-2); 121 } 122 p = buf; 123 124 #define COPYOUT(obj, size) do { \ 125 if (len < (size)) { \ 126 xo_warnx("buffer size exceeded"); \ 127 goto fail; \ 128 } \ 129 bcopy((obj), p, (size)); \ 130 len -= (size); \ 131 p += (size); \ 132 } while (0) 133 134 #define KREAD(off, buf, len) do { \ 135 if (kread((uintptr_t)(off), (buf), (len)) != 0) \ 136 goto fail; \ 137 } while (0) 138 139 /* Write out header. */ 140 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 141 xug.xug_len = sizeof xug; 142 xug.xug_count = unp_count; 143 xug.xug_gen = unp_gencnt; 144 xug.xug_sogen = 0; 145 COPYOUT(&xug, sizeof xug); 146 147 /* Walk the PCB list. */ 148 xu.xu_len = sizeof xu; 149 KREAD(head_off, &head, sizeof(head)); 150 LIST_FOREACH(unp, &head, unp_link) { 151 xu.xu_unpp = (uintptr_t)unp; 152 KREAD(unp, &unp0, sizeof (*unp)); 153 unp = &unp0; 154 155 if (unp->unp_gencnt > unp_gencnt) 156 continue; 157 if (unp->unp_addr != NULL) { 158 KREAD(unp->unp_addr, &sun_len, sizeof(sun_len)); 159 KREAD(unp->unp_addr, &xu.xu_addr, sun_len); 160 } 161 if (unp->unp_conn != NULL) { 162 KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn)); 163 if (unp_conn.unp_addr != NULL) { 164 KREAD(unp_conn.unp_addr, &sun_len, 165 sizeof(sun_len)); 166 KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len); 167 } 168 } 169 KREAD(unp->unp_socket, &so, sizeof(so)); 170 if (sotoxsocket(&so, &xu.xu_socket) != 0) 171 goto fail; 172 COPYOUT(&xu, sizeof(xu)); 173 } 174 175 /* Reread the counts and write the footer. */ 176 kread(count_off, &unp_count, sizeof(unp_count)); 177 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 178 xug.xug_count = unp_count; 179 xug.xug_gen = unp_gencnt; 180 COPYOUT(&xug, sizeof xug); 181 182 *bufp = buf; 183 return (0); 184 185 fail: 186 free(buf); 187 return (-1); 188 #undef COPYOUT 189 #undef KREAD 190 } 191 192 void 193 unixpr(u_long count_off, u_long gencnt_off, u_long dhead_off, u_long shead_off, 194 u_long sphead_off, bool *first) 195 { 196 char *buf; 197 int ret, type; 198 struct xsocket *so; 199 struct xunpgen *xug, *oxug; 200 struct xunpcb *xunp; 201 u_long head_off; 202 203 buf = NULL; 204 for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) { 205 if (live) 206 ret = pcblist_sysctl(type, &buf); 207 else { 208 head_off = 0; 209 switch (type) { 210 case SOCK_STREAM: 211 head_off = shead_off; 212 break; 213 214 case SOCK_DGRAM: 215 head_off = dhead_off; 216 break; 217 218 case SOCK_SEQPACKET: 219 head_off = sphead_off; 220 break; 221 } 222 ret = pcblist_kvm(count_off, gencnt_off, head_off, 223 &buf); 224 } 225 if (ret == -1) 226 continue; 227 if (ret < 0) 228 return; 229 230 oxug = xug = (struct xunpgen *)buf; 231 for (xug = (struct xunpgen *)((char *)xug + xug->xug_len); 232 xug->xug_len > sizeof(struct xunpgen); 233 xug = (struct xunpgen *)((char *)xug + xug->xug_len)) { 234 xunp = (struct xunpcb *)xug; 235 so = &xunp->xu_socket; 236 237 /* Ignore PCBs which were freed during copyout. */ 238 if (xunp->unp_gencnt > oxug->xug_gen) 239 continue; 240 if (*first) { 241 xo_open_list("socket"); 242 *first = false; 243 } 244 xo_open_instance("socket"); 245 unixdomainpr(xunp, so); 246 xo_close_instance("socket"); 247 } 248 if (xug != oxug && xug->xug_gen != oxug->xug_gen) { 249 if (oxug->xug_count > xug->xug_count) { 250 xo_emit("Some {:type/%s} sockets may have " 251 "been {:action/deleted}.\n", 252 socktype[type]); 253 } else if (oxug->xug_count < xug->xug_count) { 254 xo_emit("Some {:type/%s} sockets may have " 255 "been {:action/created}.\n", 256 socktype[type]); 257 } else { 258 xo_emit("Some {:type/%s} sockets may have " 259 "been {:action/created or deleted}", 260 socktype[type]); 261 } 262 } 263 free(buf); 264 } 265 } 266 267 static void 268 unixdomainpr(struct xunpcb *xunp, struct xsocket *so) 269 { 270 struct sockaddr_un *sa; 271 static int first = 1; 272 char buf1[33]; 273 static const char *titles[2] = { 274 "{T:/%-8.8s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%8.8s} " 275 "{T:/%8.8s} {T:/%8.8s} {T:/%8.8s} {T:Addr}\n", 276 "{T:/%-16.16s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%16.16s} " 277 "{T:/%16.16s} {T:/%16.16s} {T:/%16.16s} {T:Addr}\n" 278 }; 279 static const char *format[2] = { 280 "{q:address/%8lx} {t:type/%-6.6s} " 281 "{:receive-bytes-waiting/%6u} " 282 "{:send-bytes-waiting/%6u} " 283 "{q:vnode/%8lx} {q:connection/%8lx} " 284 "{q:first-reference/%8lx} {q:next-reference/%8lx}", 285 "{q:address/%16lx} {t:type/%-6.6s} " 286 "{:receive-bytes-waiting/%6u} " 287 "{:send-bytes-waiting/%6u} " 288 "{q:vnode/%16lx} {q:connection/%16lx} " 289 "{q:first-reference/%16lx} {q:next-reference/%16lx}" 290 }; 291 int fmt = (sizeof(void *) == 8) ? 1 : 0; 292 293 sa = (xunp->xu_addr.sun_family == AF_UNIX) ? &xunp->xu_addr : NULL; 294 295 if (first && !Lflag) { 296 xo_emit("{T:Active UNIX domain sockets}\n"); 297 xo_emit(titles[fmt], 298 "Address", "Type", "Recv-Q", "Send-Q", 299 "Inode", "Conn", "Refs", "Nextref"); 300 first = 0; 301 } 302 303 if (Lflag && so->so_qlimit == 0) 304 return; 305 306 if (Lflag) { 307 snprintf(buf1, sizeof buf1, "%u/%u/%u", so->so_qlen, 308 so->so_incqlen, so->so_qlimit); 309 xo_emit("unix {d:socket/%-32.32s}{e:queue-length/%u}" 310 "{e:incomplete-queue-length/%u}{e:queue-limit/%u}", 311 buf1, so->so_qlen, so->so_incqlen, so->so_qlimit); 312 } else { 313 xo_emit(format[fmt], 314 (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc, 315 so->so_snd.sb_cc, (long)xunp->unp_vnode, 316 (long)xunp->unp_conn, (long)xunp->xu_firstref, 317 (long)xunp->xu_nextref); 318 } 319 if (sa) 320 xo_emit(" {:path/%.*s}", 321 (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)), 322 sa->sun_path); 323 xo_emit("\n"); 324 } 325