1 /*- 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if 0 31 #ifndef lint 32 static char sccsid[] = "@(#)unix.c 8.1 (Berkeley) 6/6/93"; 33 #endif /* not lint */ 34 #endif 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 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 #include <sys/socketvar.h> 47 #include <sys/mbuf.h> 48 #include <sys/sysctl.h> 49 #include <sys/un.h> 50 #include <sys/unpcb.h> 51 52 #include <netinet/in.h> 53 54 #include <errno.h> 55 #include <err.h> 56 #include <stddef.h> 57 #include <stdint.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <stdbool.h> 61 #include <strings.h> 62 #ifndef FSTACK 63 #include <kvm.h> 64 #endif 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 sprintf(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 #ifndef FSTACK 102 static int 103 pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp) 104 { 105 struct unp_head head; 106 struct unpcb *unp, unp_conn; 107 u_char sun_len; 108 struct socket so; 109 struct xunpgen xug; 110 struct xunpcb xu; 111 unp_gen_t unp_gencnt; 112 u_int unp_count; 113 char *buf, *p; 114 size_t len; 115 116 if (count_off == 0 || gencnt_off == 0) 117 return (-2); 118 if (head_off == 0) 119 return (-1); 120 kread(count_off, &unp_count, sizeof(unp_count)); 121 len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu); 122 if ((buf = malloc(len)) == NULL) { 123 xo_warnx("malloc %lu bytes", (u_long)len); 124 return (-2); 125 } 126 p = buf; 127 128 #define COPYOUT(obj, size) do { \ 129 if (len < (size)) { \ 130 xo_warnx("buffer size exceeded"); \ 131 goto fail; \ 132 } \ 133 bcopy((obj), p, (size)); \ 134 len -= (size); \ 135 p += (size); \ 136 } while (0) 137 138 #define KREAD(off, buf, len) do { \ 139 if (kread((uintptr_t)(off), (buf), (len)) != 0) \ 140 goto fail; \ 141 } while (0) 142 143 /* Write out header. */ 144 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 145 xug.xug_len = sizeof xug; 146 xug.xug_count = unp_count; 147 xug.xug_gen = unp_gencnt; 148 xug.xug_sogen = 0; 149 COPYOUT(&xug, sizeof xug); 150 151 /* Walk the PCB list. */ 152 xu.xu_len = sizeof xu; 153 KREAD(head_off, &head, sizeof(head)); 154 LIST_FOREACH(unp, &head, unp_link) { 155 xu.xu_unpp = unp; 156 KREAD(unp, &xu.xu_unp, sizeof (*unp)); 157 unp = &xu.xu_unp; 158 159 if (unp->unp_gencnt > unp_gencnt) 160 continue; 161 if (unp->unp_addr != NULL) { 162 KREAD(unp->unp_addr, &sun_len, sizeof(sun_len)); 163 KREAD(unp->unp_addr, &xu.xu_addr, sun_len); 164 } 165 if (unp->unp_conn != NULL) { 166 KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn)); 167 if (unp_conn.unp_addr != NULL) { 168 KREAD(unp_conn.unp_addr, &sun_len, 169 sizeof(sun_len)); 170 KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len); 171 } 172 } 173 KREAD(unp->unp_socket, &so, sizeof(so)); 174 if (sotoxsocket(&so, &xu.xu_socket) != 0) 175 goto fail; 176 COPYOUT(&xu, sizeof(xu)); 177 } 178 179 /* Reread the counts and write the footer. */ 180 kread(count_off, &unp_count, sizeof(unp_count)); 181 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 182 xug.xug_count = unp_count; 183 xug.xug_gen = unp_gencnt; 184 COPYOUT(&xug, sizeof xug); 185 186 *bufp = buf; 187 return (0); 188 189 fail: 190 free(buf); 191 return (-1); 192 #undef COPYOUT 193 #undef KREAD 194 } 195 #endif 196 197 void 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 #ifndef FSTACK 207 u_long head_off; 208 #endif 209 210 buf = NULL; 211 for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) { 212 if (live) 213 ret = pcblist_sysctl(type, &buf); 214 else { 215 #ifndef FSTACK 216 head_off = 0; 217 switch (type) { 218 case SOCK_STREAM: 219 head_off = shead_off; 220 break; 221 222 case SOCK_DGRAM: 223 head_off = dhead_off; 224 break; 225 226 case SOCK_SEQPACKET: 227 head_off = sphead_off; 228 break; 229 } 230 ret = pcblist_kvm(count_off, gencnt_off, head_off, 231 &buf); 232 #endif 233 } 234 if (ret == -1) 235 continue; 236 if (ret < 0) 237 return; 238 239 oxug = xug = (struct xunpgen *)buf; 240 for (xug = (struct xunpgen *)((char *)xug + xug->xug_len); 241 xug->xug_len > sizeof(struct xunpgen); 242 xug = (struct xunpgen *)((char *)xug + xug->xug_len)) { 243 xunp = (struct xunpcb *)xug; 244 so = &xunp->xu_socket; 245 246 /* Ignore PCBs which were freed during copyout. */ 247 if (xunp->xu_unp.unp_gencnt > oxug->xug_gen) 248 continue; 249 if (*first) { 250 xo_open_list("socket"); 251 *first = false; 252 } 253 xo_open_instance("socket"); 254 unixdomainpr(xunp, so); 255 xo_close_instance("socket"); 256 } 257 if (xug != oxug && xug->xug_gen != oxug->xug_gen) { 258 if (oxug->xug_count > xug->xug_count) { 259 xo_emit("Some {:type/%s} sockets may have " 260 "been {:action/deleted}.\n", 261 socktype[type]); 262 } else if (oxug->xug_count < xug->xug_count) { 263 xo_emit("Some {:type/%s} sockets may have " 264 "been {:action/created}.\n", 265 socktype[type]); 266 } else { 267 xo_emit("Some {:type/%s} sockets may have " 268 "been {:action/created or deleted}", 269 socktype[type]); 270 } 271 } 272 free(buf); 273 } 274 } 275 276 static void 277 unixdomainpr(struct xunpcb *xunp, struct xsocket *so) 278 { 279 struct unpcb *unp; 280 struct sockaddr_un *sa; 281 static int first = 1; 282 char buf1[33]; 283 static const char *titles[2] = { 284 "{T:/%-8.8s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%8.8s} " 285 "{T:/%8.8s} {T:/%8.8s} {T:/%8.8s} {T:Addr}\n", 286 "{T:/%-16.16s} {T:/%-6.6s} {T:/%-6.6s} {T:/%-6.6s} {T:/%16.16s} " 287 "{T:/%16.16s} {T:/%16.16s} {T:/%16.16s} {T:Addr}\n" 288 }; 289 static const char *format[2] = { 290 "{q:address/%8lx} {t:type/%-6.6s} " 291 "{:receive-bytes-waiting/%6u} " 292 "{:send-bytes-waiting/%6u} " 293 "{q:vnode/%8lx} {q:connection/%8lx} " 294 "{q:first-reference/%8lx} {q:next-reference/%8lx}", 295 "{q:address/%16lx} {t:type/%-6.6s} " 296 "{:receive-bytes-waiting/%6u} " 297 "{:send-bytes-waiting/%6u} " 298 "{q:vnode/%16lx} {q:connection/%16lx} " 299 "{q:first-reference/%16lx} {q:next-reference/%16lx}" 300 }; 301 int fmt = (sizeof(void *) == 8) ? 1 : 0; 302 303 unp = &xunp->xu_unp; 304 if (unp->unp_addr) 305 sa = &xunp->xu_addr; 306 else 307 sa = (struct sockaddr_un *)0; 308 309 if (first && !Lflag) { 310 xo_emit("{T:Active UNIX domain sockets}\n"); 311 xo_emit(titles[fmt], 312 "Address", "Type", "Recv-Q", "Send-Q", 313 "Inode", "Conn", "Refs", "Nextref"); 314 first = 0; 315 } 316 317 if (Lflag && so->so_qlimit == 0) 318 return; 319 320 if (Lflag) { 321 snprintf(buf1, sizeof buf1, "%u/%u/%u", so->so_qlen, 322 so->so_incqlen, so->so_qlimit); 323 xo_emit("unix {d:socket/%-32.32s}{e:queue-length/%u}" 324 "{e:incomplete-queue-length/%u}{e:queue-limit/%u}", 325 buf1, so->so_qlen, so->so_incqlen, so->so_qlimit); 326 } else { 327 xo_emit(format[fmt], 328 (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc, 329 so->so_snd.sb_cc, (long)unp->unp_vnode, 330 (long)unp->unp_conn, 331 (long)LIST_FIRST(&unp->unp_refs), 332 (long)LIST_NEXT(unp, unp_reflink)); 333 } 334 if (sa) 335 xo_emit(" {:path/%.*s}", 336 (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)), 337 sa->sun_path); 338 xo_emit("\n"); 339 } 340