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 <strings.h> 61 #include <kvm.h> 62 #include "netstat.h" 63 64 static void unixdomainpr(struct xunpcb *, struct xsocket *); 65 66 static const char *const socktype[] = 67 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" }; 68 69 static int 70 pcblist_sysctl(int type, char **bufp) 71 { 72 char *buf; 73 size_t len; 74 char mibvar[sizeof "net.local.seqpacket.pcblist"]; 75 76 sprintf(mibvar, "net.local.%s.pcblist", socktype[type]); 77 78 len = 0; 79 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) { 80 if (errno != ENOENT) 81 warn("sysctl: %s", mibvar); 82 return (-1); 83 } 84 if ((buf = malloc(len)) == 0) { 85 warnx("malloc %lu bytes", (u_long)len); 86 return (-2); 87 } 88 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) { 89 warn("sysctl: %s", mibvar); 90 free(buf); 91 return (-2); 92 } 93 *bufp = buf; 94 return (0); 95 } 96 97 static int 98 pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp) 99 { 100 struct unp_head head; 101 struct unpcb *unp, unp_conn; 102 u_char sun_len; 103 struct socket so; 104 struct xunpgen xug; 105 struct xunpcb xu; 106 unp_gen_t unp_gencnt; 107 u_int unp_count; 108 char *buf, *p; 109 size_t len; 110 111 if (count_off == 0 || gencnt_off == 0) 112 return (-2); 113 if (head_off == 0) 114 return (-1); 115 kread(count_off, &unp_count, sizeof(unp_count)); 116 len = 2 * sizeof(xug) + (unp_count + unp_count / 8) * sizeof(xu); 117 if ((buf = malloc(len)) == 0) { 118 warnx("malloc %lu bytes", (u_long)len); 119 return (-2); 120 } 121 p = buf; 122 123 #define COPYOUT(obj, size) do { \ 124 if (len < (size)) { \ 125 warnx("buffer size exceeded"); \ 126 goto fail; \ 127 } \ 128 bcopy((obj), p, (size)); \ 129 len -= (size); \ 130 p += (size); \ 131 } while (0) 132 133 #define KREAD(off, buf, len) do { \ 134 if (kread((uintptr_t)(off), (buf), (len)) != 0) \ 135 goto fail; \ 136 } while (0) 137 138 /* Write out header. */ 139 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 140 xug.xug_len = sizeof xug; 141 xug.xug_count = unp_count; 142 xug.xug_gen = unp_gencnt; 143 xug.xug_sogen = 0; 144 COPYOUT(&xug, sizeof xug); 145 146 /* Walk the PCB list. */ 147 xu.xu_len = sizeof xu; 148 KREAD(head_off, &head, sizeof(head)); 149 LIST_FOREACH(unp, &head, unp_link) { 150 xu.xu_unpp = unp; 151 KREAD(unp, &xu.xu_unp, sizeof (*unp)); 152 unp = &xu.xu_unp; 153 154 if (unp->unp_gencnt > unp_gencnt) 155 continue; 156 if (unp->unp_addr != NULL) { 157 KREAD(unp->unp_addr, &sun_len, sizeof(sun_len)); 158 KREAD(unp->unp_addr, &xu.xu_addr, sun_len); 159 } 160 if (unp->unp_conn != NULL) { 161 KREAD(unp->unp_conn, &unp_conn, sizeof(unp_conn)); 162 if (unp_conn.unp_addr != NULL) { 163 KREAD(unp_conn.unp_addr, &sun_len, 164 sizeof(sun_len)); 165 KREAD(unp_conn.unp_addr, &xu.xu_caddr, sun_len); 166 } 167 } 168 KREAD(unp->unp_socket, &so, sizeof(so)); 169 if (sotoxsocket(&so, &xu.xu_socket) != 0) 170 goto fail; 171 COPYOUT(&xu, sizeof(xu)); 172 } 173 174 /* Reread the counts and write the footer. */ 175 kread(count_off, &unp_count, sizeof(unp_count)); 176 kread(gencnt_off, &unp_gencnt, sizeof(unp_gencnt)); 177 xug.xug_count = unp_count; 178 xug.xug_gen = unp_gencnt; 179 COPYOUT(&xug, sizeof xug); 180 181 *bufp = buf; 182 return (0); 183 184 fail: 185 free(buf); 186 return (-1); 187 #undef COPYOUT 188 #undef KREAD 189 } 190 191 void 192 unixpr(u_long count_off, u_long gencnt_off, u_long dhead_off, u_long shead_off, 193 u_long sphead_off) 194 { 195 char *buf; 196 int ret, type; 197 struct xsocket *so; 198 struct xunpgen *xug, *oxug; 199 struct xunpcb *xunp; 200 u_long head_off; 201 202 buf = NULL; 203 for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) { 204 if (live) 205 ret = pcblist_sysctl(type, &buf); 206 else { 207 head_off = 0; 208 switch (type) { 209 case SOCK_STREAM: 210 head_off = shead_off; 211 break; 212 213 case SOCK_DGRAM: 214 head_off = dhead_off; 215 break; 216 217 case SOCK_SEQPACKET: 218 head_off = sphead_off; 219 break; 220 } 221 ret = pcblist_kvm(count_off, gencnt_off, head_off, 222 &buf); 223 } 224 if (ret == -1) 225 continue; 226 if (ret < 0) 227 return; 228 229 oxug = xug = (struct xunpgen *)buf; 230 for (xug = (struct xunpgen *)((char *)xug + xug->xug_len); 231 xug->xug_len > sizeof(struct xunpgen); 232 xug = (struct xunpgen *)((char *)xug + xug->xug_len)) { 233 xunp = (struct xunpcb *)xug; 234 so = &xunp->xu_socket; 235 236 /* Ignore PCBs which were freed during copyout. */ 237 if (xunp->xu_unp.unp_gencnt > oxug->xug_gen) 238 continue; 239 unixdomainpr(xunp, so); 240 } 241 if (xug != oxug && xug->xug_gen != oxug->xug_gen) { 242 if (oxug->xug_count > xug->xug_count) { 243 printf("Some %s sockets may have been deleted.\n", 244 socktype[type]); 245 } else if (oxug->xug_count < xug->xug_count) { 246 printf("Some %s sockets may have been created.\n", 247 socktype[type]); 248 } else { 249 printf("Some %s sockets may have been created or deleted", 250 socktype[type]); 251 } 252 } 253 free(buf); 254 } 255 } 256 257 static void 258 unixdomainpr(struct xunpcb *xunp, struct xsocket *so) 259 { 260 struct unpcb *unp; 261 struct sockaddr_un *sa; 262 static int first = 1; 263 char buf1[15]; 264 265 unp = &xunp->xu_unp; 266 if (unp->unp_addr) 267 sa = &xunp->xu_addr; 268 else 269 sa = (struct sockaddr_un *)0; 270 271 if (first && !Lflag) { 272 printf("Active UNIX domain sockets\n"); 273 printf( 274 "%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n", 275 "Address", "Type", "Recv-Q", "Send-Q", 276 "Inode", "Conn", "Refs", "Nextref"); 277 first = 0; 278 } 279 280 if (Lflag && so->so_qlimit == 0) 281 return; 282 283 if (Lflag) { 284 snprintf(buf1, 15, "%d/%d/%d", so->so_qlen, 285 so->so_incqlen, so->so_qlimit); 286 printf("unix %-14.14s", buf1); 287 } else { 288 printf("%8lx %-6.6s %6u %6u %8lx %8lx %8lx %8lx", 289 (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc, 290 so->so_snd.sb_cc, (long)unp->unp_vnode, 291 (long)unp->unp_conn, 292 (long)LIST_FIRST(&unp->unp_refs), 293 (long)LIST_NEXT(unp, unp_reflink)); 294 } 295 if (sa) 296 printf(" %.*s", 297 (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)), 298 sa->sun_path); 299 putchar('\n'); 300 } 301