1 /* $NetBSD: bpf.c,v 1.7 2008/04/24 04:09:27 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Rui Paulo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <kvm.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <net/if.h> 48 #include <sys/types.h> 49 #include <sys/param.h> 50 #include <sys/sysctl.h> 51 #include <net/bpfdesc.h> 52 #include <net/bpf.h> 53 #include "netstat.h" 54 55 void 56 bpf_stats(void) 57 { 58 struct bpf_stat bpf_s; 59 size_t len = sizeof(bpf_s); 60 61 if (use_sysctl) { 62 if (sysctlbyname("net.bpf.stats", &bpf_s, &len, NULL, 0) == -1) 63 err(1, "net.bpf.stats"); 64 65 printf("bpf:\n"); 66 printf("\t%" PRIu64 " total packets received\n", 67 bpf_s.bs_recv); 68 printf("\t%" PRIu64 " total packets captured\n", 69 bpf_s.bs_capt); 70 printf("\t%" PRIu64 " total packets dropped\n", 71 bpf_s.bs_drop); 72 } else { 73 warnx("BPF stats not available via KVM."); 74 } 75 } 76 77 void 78 bpf_dump(char *interface) 79 { 80 struct bpf_d_ext *dpe; 81 82 if (use_sysctl) { 83 int name[CTL_MAXNAME], rc, i; 84 size_t sz, szproc; 85 u_int namelen; 86 void *v; 87 struct kinfo_proc2 p; 88 89 /* adapted from sockstat.c by Andrew Brown */ 90 91 sz = CTL_MAXNAME; 92 if (sysctlnametomib("net.bpf.peers", &name[0], &sz) == -1) 93 err(1, "sysctlnametomib: net.bpf.peers"); 94 namelen = sz; 95 96 name[namelen++] = sizeof(*dpe); 97 name[namelen++] = INT_MAX; 98 99 v = NULL; 100 sz = 0; 101 do { 102 rc = sysctl(&name[0], namelen, v, &sz, NULL, 0); 103 if (rc == -1 && errno != ENOMEM) 104 err(1, "sysctl: net.bpf.peers"); 105 if (rc == -1 && v != NULL) { 106 free(v); 107 v = NULL; 108 } 109 if (v == NULL) { 110 v = malloc(sz); 111 rc = -1; 112 } 113 if (v == NULL) 114 err(1, "malloc"); 115 } while (rc == -1); 116 117 dpe = v; 118 119 puts("Active BPF peers\nPID\tInt\tRecv Drop Capt" \ 120 " Flags Bufsize Comm"); 121 122 #define BPFEXT(entry) dpe->entry 123 124 for (i = 0; i < (sz / sizeof(*dpe)); i++, dpe++) { 125 if (interface && 126 strncmp(BPFEXT(bde_ifname), interface, IFNAMSIZ)) 127 continue; 128 129 printf("%-7d ", BPFEXT(bde_pid)); 130 printf("%-7s ", 131 (BPFEXT(bde_ifname)[0] == '\0') ? "-" : 132 BPFEXT(bde_ifname)); 133 134 printf("%-8" PRIu64 " %-8" PRIu64 " %-8" PRIu64 " ", 135 BPFEXT(bde_rcount), BPFEXT(bde_dcount), 136 BPFEXT(bde_ccount)); 137 138 switch (BPFEXT(bde_state)) { 139 case BPF_IDLE: 140 printf("I"); 141 break; 142 case BPF_WAITING: 143 printf("W"); 144 break; 145 case BPF_TIMED_OUT: 146 printf("T"); 147 break; 148 default: 149 printf("-"); 150 break; 151 } 152 153 printf("%c", BPFEXT(bde_promisc) ? 'P' : '-'); 154 printf("%c", BPFEXT(bde_immediate) ? 'R' : '-'); 155 printf("%c", BPFEXT(bde_seesent) ? 'S' : '-'); 156 printf("%c", BPFEXT(bde_hdrcmplt) ? 'H' : '-'); 157 printf(" %-8d ", BPFEXT(bde_bufsize)); 158 159 szproc = sizeof(p); 160 namelen = 0; 161 name[namelen++] = CTL_KERN; 162 name[namelen++] = KERN_PROC2; 163 name[namelen++] = KERN_PROC_PID; 164 name[namelen++] = BPFEXT(bde_pid); 165 name[namelen++] = szproc; 166 name[namelen++] = 1; 167 168 if (sysctl(&name[0], namelen, &p, &szproc, 169 NULL, 0) == -1) 170 printf("-\n"); 171 else 172 printf("%s\n", p.p_comm); 173 #undef BPFEXT 174 } 175 } else { 176 /* XXX */ 177 errx(1, "bpf_dump not implemented using kvm"); 178 } 179 } 180