netgraph.c revision 100591
1/* 2 * Copyright (c) 1996-1999 Whistle Communications, Inc. 3 * All rights reserved. 4 * 5 * Subject to the following obligations and disclaimer of warranty, use and 6 * redistribution of this software, in source or object code forms, with or 7 * without modifications are expressly permitted by Whistle Communications; 8 * provided, however, that: 9 * 1. Any and all reproductions of the source or object code must include the 10 * copyright notice above and the following disclaimer of warranties; and 11 * 2. No rights are granted, in any manner or form, to use Whistle 12 * Communications, Inc. trademarks, including the mark "WHISTLE 13 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 14 * such appears in the above copyright notice or in the software. 15 * 16 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 17 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 18 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 19 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 21 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 22 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 23 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 24 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 25 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 26 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 27 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 32 * OF SUCH DAMAGE. 33 * 34 * $FreeBSD: head/usr.bin/netstat/netgraph.c 100591 2002-07-24 03:02:43Z jdp $ 35 */ 36 37#ifndef lint 38static const char rcsid[] = 39 "$Id: atalk.c,v 1.11 1998/07/06 21:01:22 bde Exp $"; 40#endif /* not lint */ 41 42#include <sys/param.h> 43#include <sys/queue.h> 44#include <sys/socket.h> 45#include <sys/socketvar.h> 46#include <sys/protosw.h> 47#include <sys/linker.h> 48 49#include <net/route.h> 50 51#include <netgraph.h> 52#include <netgraph/ng_message.h> 53#include <netgraph/ng_socket.h> 54#include <netgraph/ng_socketvar.h> 55 56#include <nlist.h> 57#include <errno.h> 58#include <stdio.h> 59#include <string.h> 60#include <unistd.h> 61#include <err.h> 62#include "netstat.h" 63 64static int first = 1; 65static int csock = -1; 66 67void 68netgraphprotopr(u_long off, char *name, int af __unused) 69{ 70 struct ngpcb *this, *next; 71 struct ngpcb ngpcb; 72 struct ngsock info; 73 struct socket sockb; 74 int debug = 1; 75 76 /* If symbol not found, try looking in the KLD module */ 77 if (off == 0) { 78 const char *const modname = "ng_socket.ko"; 79/* XXX We should get "mpath" from "sysctl kern.module_path" */ 80 const char *mpath[] = { "/", "/boot/", "/modules/", NULL }; 81 struct nlist sym[] = { { "_ngsocklist" }, { NULL } }; 82 const char **pre; 83 struct kld_file_stat ks; 84 int fileid; 85 86 /* See if module is loaded */ 87 if ((fileid = kldfind(modname)) < 0) { 88 if (debug) 89 warn("kldfind(%s)", modname); 90 return; 91 } 92 93 /* Get module info */ 94 memset(&ks, 0, sizeof(ks)); 95 ks.version = sizeof(struct kld_file_stat); 96 if (kldstat(fileid, &ks) < 0) { 97 if (debug) 98 warn("kldstat(%d)", fileid); 99 return; 100 } 101 102 /* Get symbol table from module file */ 103 for (pre = mpath; *pre; pre++) { 104 char path[MAXPATHLEN]; 105 106 snprintf(path, sizeof(path), "%s%s", *pre, modname); 107 if (nlist(path, sym) == 0) 108 break; 109 } 110 111 /* Did we find it? */ 112 if (sym[0].n_value == 0) { 113 if (debug) 114 warnx("%s not found", modname); 115 return; 116 } 117 118 /* Symbol found at load address plus symbol offset */ 119 off = (u_long) ks.address + sym[0].n_value; 120 } 121 122 /* Get pointer to first socket */ 123 kread(off, (char *)&this, sizeof(this)); 124 125 /* Get my own socket node */ 126 if (csock == -1) 127 NgMkSockNode(NULL, &csock, NULL); 128 129 for (; this != NULL; this = next) { 130 u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)]; 131 struct ng_mesg *resp = (struct ng_mesg *) rbuf; 132 struct nodeinfo *ni = (struct nodeinfo *) resp->data; 133 char path[64]; 134 135 /* Read in ngpcb structure */ 136 kread((u_long)this, (char *)&ngpcb, sizeof(ngpcb)); 137 next = LIST_NEXT(&ngpcb, socks); 138 139 /* Read in socket structure */ 140 kread((u_long)ngpcb.ng_socket, (char *)&sockb, sizeof(sockb)); 141 142 /* Check type of socket */ 143 if (strcmp(name, "ctrl") == 0 && ngpcb.type != NG_CONTROL) 144 continue; 145 if (strcmp(name, "data") == 0 && ngpcb.type != NG_DATA) 146 continue; 147 148 /* Do headline */ 149 if (first) { 150 printf("Netgraph sockets\n"); 151 if (Aflag) 152 printf("%-8.8s ", "PCB"); 153 printf("%-5.5s %-6.6s %-6.6s %-14.14s %s\n", 154 "Type", "Recv-Q", "Send-Q", 155 "Node Address", "#Hooks"); 156 first = 0; 157 } 158 159 /* Show socket */ 160 if (Aflag) 161 printf("%8lx ", (u_long) this); 162 printf("%-5.5s %6u %6u ", 163 name, sockb.so_rcv.sb_cc, sockb.so_snd.sb_cc); 164 165 /* Get ngsock structure */ 166 if (ngpcb.sockdata == 0) /* unconnected data socket */ 167 goto finish; 168 kread((u_long)ngpcb.sockdata, (char *)&info, sizeof(info)); 169 170 /* Get info on associated node */ 171 if (info.node == 0 || csock == -1) 172 goto finish; 173 snprintf(path, sizeof(path), "[%lx]:", (u_long) info.node); 174 if (NgSendMsg(csock, path, 175 NGM_GENERIC_COOKIE, NGM_NODEINFO, NULL, 0) < 0) 176 goto finish; 177 if (NgRecvMsg(csock, resp, sizeof(rbuf), NULL) < 0) 178 goto finish; 179 180 /* Display associated node info */ 181 if (*ni->name != '\0') 182 snprintf(path, sizeof(path), "%s:", ni->name); 183 printf("%-14.14s %4d", path, ni->hooks); 184finish: 185 putchar('\n'); 186 } 187} 188 189