1/* $NetBSD: unix.c,v 1.37 2022/09/02 06:25:43 msaitoh 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 35static char sccsid[] = "from: @(#)unix.c 8.1 (Berkeley) 6/6/93"; 36#else 37__RCSID("$NetBSD: unix.c,v 1.37 2022/09/02 06:25:43 msaitoh 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 _KMEMUSER 56#include <sys/file.h> 57#undef _KMEMUSER 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#include "prog_ops.h" 68 69static void unixdomainprhdr(void); 70static void unixdomainpr0(u_long, u_long, u_long, u_long, u_long, u_long, 71 u_long, u_long, u_long, struct sockaddr_un *, int); 72static void unixdomainpr(struct socket *, void *); 73 74static struct file *file, *fileNFILE; 75static int ns_nfiles; 76 77static void 78unixdomainprhdr(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 86static const char * const socktype[] = 87 { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" }; 88 89static void 90unixdomainpr0(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 104static void 105unixdomainpr(struct socket *so, void *soaddr) 106{ 107 struct unpcb unp, runp; 108 struct sockaddr_un sun, rsun; 109 static int first = 1; 110 int remote = 0; 111 112 if (kread((u_long)so->so_pcb, (char *)&unp, sizeof (unp))) 113 return; 114 if (unp.unp_addr) 115 if (kread((u_long)unp.unp_addr, (char *)&sun, sizeof (sun))) 116 unp.unp_addr = 0; 117 118 if (!unp.unp_addr) { 119 memset(&rsun, 0, sizeof(rsun)); 120 if (unp.unp_conn && 121 kread((u_long)unp.unp_conn, (char *)&runp, sizeof (runp)) == 0 && 122 runp.unp_addr && 123 kread((u_long)runp.unp_addr, (char *)&rsun, sizeof (rsun)) == 0 && 124 rsun.sun_path[0] != '\0') 125 remote = 1; 126 } 127 128 if (first) { 129 unixdomainprhdr(); 130 first = 0; 131 } 132 133 unixdomainpr0((u_long)so->so_pcb, so->so_type, so->so_rcv.sb_cc, 134 so->so_snd.sb_cc, (u_long)unp.unp_vnode, 135 (u_long)unp.unp_conn, (u_long)unp.unp_refs, 136 (u_long)unp.unp_nextref, (u_long)unp.unp_addr, 137 remote ? &rsun : &sun, remote); 138} 139 140void 141unixpr(u_long off) 142{ 143 struct file *fp; 144 struct socket sock, *so = &sock; 145 char *filebuf; 146 struct protosw *unixsw = (struct protosw *)off; 147 148 if (use_sysctl) { 149 struct kinfo_pcb *pcblist; 150 int mib[8]; 151 size_t namelen = 0, size = 0, i; 152 const char *mibnames[] = { 153 "net.local.stream.pcblist", 154 "net.local.dgram.pcblist", 155 "net.local.seqpacket.pcblist", 156 NULL, 157 }; 158 const char **mibname; 159 static int first = 1; 160 161 for (mibname = mibnames; *mibname; mibname++) { 162 memset(mib, 0, sizeof(mib)); 163 164 if (sysctlnametomib(*mibname, mib, &namelen) == -1) 165 err(1, "sysctlnametomib: %s", *mibname); 166 167 if (prog_sysctl(mib, sizeof(mib) / sizeof(*mib), 168 NULL, &size, NULL, 0) == -1) 169 err(1, "sysctl (query)"); 170 171 if ((pcblist = malloc(size)) == NULL) 172 err(1, "malloc"); 173 memset(pcblist, 0, size); 174 175 mib[6] = sizeof(*pcblist); 176 mib[7] = size / sizeof(*pcblist); 177 178 if (prog_sysctl(mib, sizeof(mib) / sizeof(*mib), 179 pcblist, &size, NULL, 0) == -1) 180 err(1, "sysctl (copy)"); 181 182 for (i = 0; i < size / sizeof(*pcblist); i++) { 183 struct kinfo_pcb *ki = &pcblist[i]; 184 struct sockaddr_un *sun; 185 int remote = 0; 186 187 if (first) { 188 unixdomainprhdr(); 189 first = 0; 190 } 191 192 sun = (struct sockaddr_un *)&ki->ki_dst; 193 if (sun->sun_path[0] != '\0') { 194 remote = 1; 195 } else { 196 sun = (struct sockaddr_un *)&ki->ki_src; 197 } 198 199 unixdomainpr0(ki->ki_pcbaddr, ki->ki_type, 200 ki->ki_rcvq, ki->ki_sndq, 201 ki->ki_vnode, ki->ki_conn, 202 ki->ki_refs, ki->ki_nextref, 203 ki->ki_sockaddr, sun, remote); 204 } 205 206 free(pcblist); 207 } 208 209 } else { 210 filebuf = (char *)kvm_getfiles(get_kvmd(), KERN_FILE, 211 0, &ns_nfiles); 212 if (filebuf == 0) { 213 printf("file table read error: %s", 214 kvm_geterr(get_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 && 226 so->so_proto <= unixsw + 2) 227 if (so->so_pcb) 228 unixdomainpr(so, fp->f_data); 229 } 230 } 231} 232