1 /*- 2 * Copyright (c) 2005 Christian S.J. Peron 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 #include <sys/types.h> 29 #include <sys/protosw.h> 30 #include <sys/socket.h> 31 #include <sys/sysctl.h> 32 #include <sys/param.h> 33 #include <sys/user.h> 34 35 #include <net/if.h> 36 #include <net/if_var.h> 37 #include <net/bpfdesc.h> 38 #include <arpa/inet.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "netstat.h" 48 49 /* print bpf stats */ 50 51 static char * 52 bpf_pidname(pid_t pid) 53 { 54 struct kinfo_proc newkp; 55 int error, mib[4]; 56 size_t size; 57 58 mib[0] = CTL_KERN; 59 mib[1] = KERN_PROC; 60 mib[2] = KERN_PROC_PID; 61 mib[3] = pid; 62 size = sizeof(newkp); 63 error = sysctl(mib, 4, &newkp, &size, NULL, 0); 64 if (error < 0) { 65 warn("kern.proc.pid failed"); 66 return (strdup("??????")); 67 } 68 return (strdup(newkp.ki_comm)); 69 } 70 71 static void 72 bpf_flags(struct xbpf_d *bd, char *flagbuf) 73 { 74 75 *flagbuf++ = bd->bd_promisc ? 'p' : '-'; 76 *flagbuf++ = bd->bd_immediate ? 'i' : '-'; 77 *flagbuf++ = bd->bd_hdrcmplt ? '-' : 'f'; 78 *flagbuf++ = bd->bd_seesent ? 's' : '-'; 79 *flagbuf++ = bd->bd_async ? 'a' : '-'; 80 *flagbuf++ = bd->bd_locked ? 'l' : '-'; 81 *flagbuf++ = '\0'; 82 } 83 84 void 85 bpf_stats(char *interface) 86 { 87 struct xbpf_d *d, *bd; 88 char *pname, flagbuf[12]; 89 size_t size; 90 91 if (sysctlbyname("net.bpf.stats", NULL, &size, 92 NULL, 0) < 0) { 93 warn("net.bpf.stats"); 94 return; 95 } 96 if (size == 0) 97 return; 98 bd = malloc(size); 99 if (bd == NULL) { 100 warn("malloc failed"); 101 return; 102 } 103 if (sysctlbyname("net.bpf.stats", bd, &size, 104 NULL, 0) < 0) { 105 warn("net.bpf.stats"); 106 free(bd); 107 return; 108 } 109 printf("%5s %6s %6s %9s %9s %9s %5s %5s %s\n", 110 "Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen", 111 "Hblen", "Command"); 112 for (d = &bd[0]; d < &bd[size / sizeof(*d)]; d++) { 113 if (interface && strcmp(interface, d->bd_ifname) != 0) 114 continue; 115 bpf_flags(d, flagbuf); 116 pname = bpf_pidname(d->bd_pid); 117 printf("%5d %6s %6s %9lu %9lu %9lu %5d %5d %s\n", 118 d->bd_pid, d->bd_ifname, flagbuf, 119 d->bd_rcount, d->bd_dcount, d->bd_fcount, 120 d->bd_slen, d->bd_hlen, pname); 121 free(pname); 122 } 123 free(bd); 124 } 125