1 /* $NetBSD: unix.c,v 1.30 2010/04/22 14:37:06 plunky Exp $ */ 2 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 #ifndef lint 34 #if 0 35 static char sccsid[] = "from: @(#)unix.c 8.1 (Berkeley) 6/6/93"; 36 #else 37 __RCSID("$NetBSD: unix.c,v 1.30 2010/04/22 14:37:06 plunky Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 /* 42 * Display protocol blocks in the unix domain. 43 */ 44 #define _KERNEL 45 #include <sys/types.h> 46 #undef _KERNEL 47 #include <sys/param.h> 48 #include <sys/protosw.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/mbuf.h> 52 #include <sys/sysctl.h> 53 #include <sys/un.h> 54 #include <sys/unpcb.h> 55 #define _KERNEL 56 #include <sys/file.h> 57 #undef _KERNEL 58 59 #include <netinet/in.h> 60 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <kvm.h> 65 #include <err.h> 66 #include "netstat.h" 67 68 static void unixdomainprhdr(void); 69 static void unixdomainpr0(u_long, u_long, u_long, u_long, u_long, u_long, 70 u_long, u_long, u_long, struct sockaddr_un *, int); 71 static void unixdomainpr(struct socket *, void *); 72 73 static struct file *file, *fileNFILE; 74 static int ns_nfiles; 75 extern kvm_t *kvmd; 76 77 static void 78 unixdomainprhdr(void) 79 { 80 printf("Active UNIX domain sockets\n"); 81 printf("%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n", 82 "Address", "Type", "Recv-Q", "Send-Q", "Inode", "Conn", "Refs", 83 "Nextref"); 84 } 85 86 static const char *socktype[] = 87 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" }; 88 89 static void 90 unixdomainpr0(u_long so_pcb, u_long so_type, u_long rcvq, u_long sndq, 91 u_long inode, u_long conn, u_long refs, u_long nextref, 92 u_long addr, struct sockaddr_un *sun, int remote) 93 { 94 printf("%8lx %-6.6s %6ld %6ld %8lx %8lx %8lx %8lx", 95 so_pcb, socktype[so_type], rcvq, sndq, inode, conn, refs, 96 nextref); 97 if (addr || remote) 98 printf((remote ? " -> %.*s" : " %.*s"), 99 (int)(sun->sun_len - (sizeof(*sun) - sizeof(sun->sun_path))), 100 sun->sun_path); 101 putchar('\n'); 102 } 103 104 static void 105 unixdomainpr(so, soaddr) 106 struct socket *so; 107 void *soaddr; 108 { 109 struct unpcb unp, runp; 110 struct sockaddr_un sun, rsun; 111 static int first = 1; 112 int remote = 0; 113 114 if (kread((u_long)so->so_pcb, (char *)&unp, sizeof (unp))) 115 return; 116 if (unp.unp_addr) 117 if (kread((u_long)unp.unp_addr, (char *)&sun, sizeof (sun))) 118 unp.unp_addr = 0; 119 120 if (!unp.unp_addr) { 121 memset(&rsun, 0, sizeof(rsun)); 122 if (unp.unp_conn && 123 kread((u_long)unp.unp_conn, (char *)&runp, sizeof (runp)) == 0 && 124 runp.unp_addr && 125 kread((u_long)runp.unp_addr, (char *)&rsun, sizeof (rsun)) == 0 && 126 rsun.sun_path[0] != '\0') 127 remote = 1; 128 } 129 130 if (first) { 131 unixdomainprhdr(); 132 first = 0; 133 } 134 135 unixdomainpr0((u_long)so->so_pcb, so->so_type, so->so_rcv.sb_cc, 136 so->so_snd.sb_cc, (u_long)unp.unp_vnode, 137 (u_long)unp.unp_conn, (u_long)unp.unp_refs, 138 (u_long)unp.unp_nextref, (u_long)unp.unp_addr, 139 remote ? &rsun : &sun, remote); 140 } 141 142 void 143 unixpr(off) 144 u_long off; 145 { 146 struct file *fp; 147 struct socket sock, *so = &sock; 148 char *filebuf; 149 struct protosw *unixsw = (struct protosw *)off; 150 151 if (use_sysctl) { 152 struct kinfo_pcb *pcblist; 153 int mib[8]; 154 size_t namelen = 0, size = 0, i; 155 const char *mibname = "net.local.stream.pcblist"; 156 static int first = 1; 157 int done = 0; 158 159 again: 160 memset(mib, 0, sizeof(mib)); 161 162 if (sysctlnametomib(mibname, mib, 163 &namelen) == -1) 164 err(1, "sysctlnametomib: %s", mibname); 165 166 if (sysctl(mib, sizeof(mib) / sizeof(*mib), NULL, &size, 167 NULL, 0) == -1) 168 err(1, "sysctl (query)"); 169 170 if ((pcblist = malloc(size)) == NULL) 171 err(1, "malloc"); 172 memset(pcblist, 0, size); 173 174 mib[6] = sizeof(*pcblist); 175 mib[7] = size / sizeof(*pcblist); 176 177 if (sysctl(mib, sizeof(mib) / sizeof(*mib), pcblist, 178 &size, NULL, 0) == -1) 179 err(1, "sysctl (copy)"); 180 181 for (i = 0; i < size / sizeof(*pcblist); i++) { 182 struct kinfo_pcb *ki = &pcblist[i]; 183 struct sockaddr_un *sun; 184 int remote = 0; 185 186 if (first) { 187 unixdomainprhdr(); 188 first = 0; 189 } 190 191 sun = (struct sockaddr_un *)&ki->ki_dst; 192 if (sun->sun_path[0] != '\0') { 193 remote = 1; 194 } else { 195 sun = (struct sockaddr_un *)&ki->ki_src; 196 } 197 198 unixdomainpr0(ki->ki_pcbaddr, ki->ki_type, 199 ki->ki_rcvq, ki->ki_sndq, 200 ki->ki_vnode, ki->ki_conn, ki->ki_refs, 201 ki->ki_nextref, ki->ki_sockaddr, sun, remote); 202 } 203 204 free(pcblist); 205 206 if (!done && mibname) { 207 mibname = "net.local.dgram.pcblist"; 208 done = 1; 209 goto again; 210 } 211 } else { 212 filebuf = (char *)kvm_getfiles(kvmd, KERN_FILE, 0, &ns_nfiles); 213 if (filebuf == 0) { 214 printf("file table read error: %s", kvm_geterr(kvmd)); 215 return; 216 } 217 file = (struct file *)(filebuf + sizeof(fp)); 218 fileNFILE = file + ns_nfiles; 219 for (fp = file; fp < fileNFILE; fp++) { 220 if (fp->f_count == 0 || fp->f_type != DTYPE_SOCKET) 221 continue; 222 if (kread((u_long)fp->f_data, (char *)so, sizeof (*so))) 223 continue; 224 /* kludge */ 225 if (so->so_proto >= unixsw && so->so_proto <= unixsw + 2) 226 if (so->so_pcb) 227 unixdomainpr(so, fp->f_data); 228 } 229 } 230 } 231