netgraph.c revision 160787
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 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: head/usr.bin/netstat/netgraph.c 160787 2006-07-28 16:09:19Z yar $"); 37 38#include <sys/param.h> 39#include <sys/queue.h> 40#include <sys/socket.h> 41#include <sys/socketvar.h> 42#include <sys/protosw.h> 43#include <sys/linker.h> 44 45#include <net/route.h> 46 47#include <netgraph.h> 48#include <netgraph/ng_message.h> 49#include <netgraph/ng_socket.h> 50#include <netgraph/ng_socketvar.h> 51 52#include <nlist.h> 53#include <errno.h> 54#include <stdint.h> 55#include <stdio.h> 56#include <string.h> 57#include <unistd.h> 58#include <err.h> 59#include "netstat.h" 60 61static int first = 1; 62static int csock = -1; 63 64void 65netgraphprotopr(u_long off, const char *name, int af1 __unused) 66{ 67 struct ngpcb *this, *next; 68 struct ngpcb ngpcb; 69 struct ngsock info; 70 struct socket sockb; 71 int debug = 1; 72 73 /* If symbol not found, try looking in the KLD module */ 74 if (off == 0) { 75 const char *const modname = "ng_socket.ko"; 76/* XXX We should get "mpath" from "sysctl kern.module_path" */ 77 const char *mpath[] = { "/", "/boot/", "/modules/", NULL }; 78 struct nlist sym[] = { { "_ngsocklist" }, { NULL } }; 79 const char **pre; 80 struct kld_file_stat ks; 81 int fileid; 82 83 /* See if module is loaded */ 84 if ((fileid = kldfind(modname)) < 0) { 85 if (debug) 86 warn("kldfind(%s)", modname); 87 return; 88 } 89 90 /* Get module info */ 91 memset(&ks, 0, sizeof(ks)); 92 ks.version = sizeof(struct kld_file_stat); 93 if (kldstat(fileid, &ks) < 0) { 94 if (debug) 95 warn("kldstat(%d)", fileid); 96 return; 97 } 98 99 /* Get symbol table from module file */ 100 for (pre = mpath; *pre; pre++) { 101 char path[MAXPATHLEN]; 102 103 snprintf(path, sizeof(path), "%s%s", *pre, modname); 104 if (nlist(path, sym) == 0) 105 break; 106 } 107 108 /* Did we find it? */ 109 if (sym[0].n_value == 0) { 110 if (debug) 111 warnx("%s not found", modname); 112 return; 113 } 114 115 /* Symbol found at load address plus symbol offset */ 116 off = (u_long) ks.address + sym[0].n_value; 117 } 118 119 /* Get pointer to first socket */ 120 kread(off, (char *)&this, sizeof(this)); 121 122 /* Get my own socket node */ 123 if (csock == -1) 124 NgMkSockNode(NULL, &csock, NULL); 125 126 for (; this != NULL; this = next) { 127 u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)]; 128 struct ng_mesg *resp = (struct ng_mesg *) rbuf; 129 struct nodeinfo *ni = (struct nodeinfo *) resp->data; 130 char path[64]; 131 132 /* Read in ngpcb structure */ 133 kread((u_long)this, (char *)&ngpcb, sizeof(ngpcb)); 134 next = LIST_NEXT(&ngpcb, socks); 135 136 /* Read in socket structure */ 137 kread((u_long)ngpcb.ng_socket, (char *)&sockb, sizeof(sockb)); 138 139 /* Check type of socket */ 140 if (strcmp(name, "ctrl") == 0 && ngpcb.type != NG_CONTROL) 141 continue; 142 if (strcmp(name, "data") == 0 && ngpcb.type != NG_DATA) 143 continue; 144 145 /* Do headline */ 146 if (first) { 147 printf("Netgraph sockets\n"); 148 if (Aflag) 149 printf("%-8.8s ", "PCB"); 150 printf("%-5.5s %-6.6s %-6.6s %-14.14s %s\n", 151 "Type", "Recv-Q", "Send-Q", 152 "Node Address", "#Hooks"); 153 first = 0; 154 } 155 156 /* Show socket */ 157 if (Aflag) 158 printf("%8lx ", (u_long) this); 159 printf("%-5.5s %6u %6u ", 160 name, sockb.so_rcv.sb_cc, sockb.so_snd.sb_cc); 161 162 /* Get ngsock structure */ 163 if (ngpcb.sockdata == 0) /* unconnected data socket */ 164 goto finish; 165 kread((u_long)ngpcb.sockdata, (char *)&info, sizeof(info)); 166 167 /* Get info on associated node */ 168 if (info.node == 0 || csock == -1) 169 goto finish; 170 snprintf(path, sizeof(path), "[%lx]:", (u_long) info.node); 171 if (NgSendMsg(csock, path, 172 NGM_GENERIC_COOKIE, NGM_NODEINFO, NULL, 0) < 0) 173 goto finish; 174 if (NgRecvMsg(csock, resp, sizeof(rbuf), NULL) < 0) 175 goto finish; 176 177 /* Display associated node info */ 178 if (*ni->name != '\0') 179 snprintf(path, sizeof(path), "%s:", ni->name); 180 printf("%-14.14s %4d", path, ni->hooks); 181finish: 182 putchar('\n'); 183 } 184} 185 186