netgraph.c revision 230481
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 230481 2012-01-23 15:39:45Z glebius $"); 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 int proto __unused) 67{ 68 struct ngpcb *this, *next; 69 struct ngpcb ngpcb; 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[] = { { .n_name = "_ngsocklist" }, 79 { .n_name = NULL } }; 80 const char **pre; 81 struct kld_file_stat ks; 82 int fileid; 83 84 /* Can't do this for core dumps. */ 85 if (!live) 86 return; 87 88 /* See if module is loaded */ 89 if ((fileid = kldfind(modname)) < 0) { 90 if (debug) 91 warn("kldfind(%s)", modname); 92 return; 93 } 94 95 /* Get module info */ 96 memset(&ks, 0, sizeof(ks)); 97 ks.version = sizeof(struct kld_file_stat); 98 if (kldstat(fileid, &ks) < 0) { 99 if (debug) 100 warn("kldstat(%d)", fileid); 101 return; 102 } 103 104 /* Get symbol table from module file */ 105 for (pre = mpath; *pre; pre++) { 106 char path[MAXPATHLEN]; 107 108 snprintf(path, sizeof(path), "%s%s", *pre, modname); 109 if (nlist(path, sym) == 0) 110 break; 111 } 112 113 /* Did we find it? */ 114 if (sym[0].n_value == 0) { 115 if (debug) 116 warnx("%s not found", modname); 117 return; 118 } 119 120 /* Symbol found at load address plus symbol offset */ 121 off = (u_long) ks.address + sym[0].n_value; 122 } 123 124 /* Get pointer to first socket */ 125 kread(off, (char *)&this, sizeof(this)); 126 127 /* Get my own socket node */ 128 if (csock == -1) 129 NgMkSockNode(NULL, &csock, NULL); 130 131 for (; this != NULL; this = next) { 132 u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)]; 133 struct ng_mesg *resp = (struct ng_mesg *) rbuf; 134 struct nodeinfo *ni = (struct nodeinfo *) resp->data; 135 char path[64]; 136 137 /* Read in ngpcb structure */ 138 kread((u_long)this, (char *)&ngpcb, sizeof(ngpcb)); 139 next = LIST_NEXT(&ngpcb, socks); 140 141 /* Read in socket structure */ 142 kread((u_long)ngpcb.ng_socket, (char *)&sockb, sizeof(sockb)); 143 144 /* Check type of socket */ 145 if (strcmp(name, "ctrl") == 0 && ngpcb.type != NG_CONTROL) 146 continue; 147 if (strcmp(name, "data") == 0 && ngpcb.type != NG_DATA) 148 continue; 149 150 /* Do headline */ 151 if (first) { 152 printf("Netgraph sockets\n"); 153 if (Aflag) 154 printf("%-8.8s ", "PCB"); 155 printf("%-5.5s %-6.6s %-6.6s %-14.14s %s\n", 156 "Type", "Recv-Q", "Send-Q", 157 "Node Address", "#Hooks"); 158 first = 0; 159 } 160 161 /* Show socket */ 162 if (Aflag) 163 printf("%8lx ", (u_long) this); 164 printf("%-5.5s %6u %6u ", 165 name, sockb.so_rcv.sb_cc, sockb.so_snd.sb_cc); 166 167 /* Get info on associated node */ 168 if (ngpcb.node_id == 0 || csock == -1) 169 goto finish; 170 snprintf(path, sizeof(path), "[%x]:", ngpcb.node_id); 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