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