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