1 /* $NetBSD: bpf.c,v 1.9 2009/04/12 16:08:37 lukem 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <err.h> 33 #include <errno.h> 34 #include <fcntl.h> 35 #include <kvm.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <net/if.h> 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/sysctl.h> 44 #include <net/bpfdesc.h> 45 #include <net/bpf.h> 46 #include "netstat.h" 47 48 void 49 bpf_stats(void) 50 { 51 struct bpf_stat bpf_s; 52 size_t len = sizeof(bpf_s); 53 54 if (use_sysctl) { 55 if (sysctlbyname("net.bpf.stats", &bpf_s, &len, NULL, 0) == -1) 56 err(1, "net.bpf.stats"); 57 58 printf("bpf:\n"); 59 printf("\t%" PRIu64 " total packets received\n", 60 bpf_s.bs_recv); 61 printf("\t%" PRIu64 " total packets captured\n", 62 bpf_s.bs_capt); 63 printf("\t%" PRIu64 " total packets dropped\n", 64 bpf_s.bs_drop); 65 } else { 66 warnx("BPF stats not available via KVM."); 67 } 68 } 69 70 void 71 bpf_dump(const char *bpfif) 72 { 73 struct bpf_d_ext *dpe; 74 75 if (use_sysctl) { 76 int name[CTL_MAXNAME], rc; 77 size_t i, sz, szproc; 78 u_int namelen; 79 void *v; 80 struct kinfo_proc2 p; 81 82 /* adapted from sockstat.c by Andrew Brown */ 83 84 sz = CTL_MAXNAME; 85 if (sysctlnametomib("net.bpf.peers", &name[0], &sz) == -1) 86 err(1, "sysctlnametomib: net.bpf.peers"); 87 namelen = sz; 88 89 name[namelen++] = sizeof(*dpe); 90 name[namelen++] = INT_MAX; 91 92 v = NULL; 93 sz = 0; 94 do { 95 rc = sysctl(&name[0], namelen, v, &sz, NULL, 0); 96 if (rc == -1 && errno != ENOMEM) 97 err(1, "sysctl: net.bpf.peers"); 98 if (rc == -1 && v != NULL) { 99 free(v); 100 v = NULL; 101 } 102 if (v == NULL) { 103 v = malloc(sz); 104 rc = -1; 105 } 106 if (v == NULL) 107 err(1, "malloc"); 108 } while (rc == -1); 109 110 dpe = v; 111 112 puts("Active BPF peers\nPID\tInt\tRecv Drop Capt" \ 113 " Flags Bufsize Comm"); 114 115 #define BPFEXT(entry) dpe->entry 116 117 for (i = 0; i < (sz / sizeof(*dpe)); i++, dpe++) { 118 if (bpfif && 119 strncmp(BPFEXT(bde_ifname), bpfif, IFNAMSIZ)) 120 continue; 121 122 printf("%-7d ", BPFEXT(bde_pid)); 123 printf("%-7s ", 124 (BPFEXT(bde_ifname)[0] == '\0') ? "-" : 125 BPFEXT(bde_ifname)); 126 127 printf("%-8" PRIu64 " %-8" PRIu64 " %-8" PRIu64 " ", 128 BPFEXT(bde_rcount), BPFEXT(bde_dcount), 129 BPFEXT(bde_ccount)); 130 131 switch (BPFEXT(bde_state)) { 132 case BPF_IDLE: 133 printf("I"); 134 break; 135 case BPF_WAITING: 136 printf("W"); 137 break; 138 case BPF_TIMED_OUT: 139 printf("T"); 140 break; 141 default: 142 printf("-"); 143 break; 144 } 145 146 printf("%c", BPFEXT(bde_promisc) ? 'P' : '-'); 147 printf("%c", BPFEXT(bde_immediate) ? 'R' : '-'); 148 printf("%c", BPFEXT(bde_seesent) ? 'S' : '-'); 149 printf("%c", BPFEXT(bde_hdrcmplt) ? 'H' : '-'); 150 printf(" %-8d ", BPFEXT(bde_bufsize)); 151 152 szproc = sizeof(p); 153 namelen = 0; 154 name[namelen++] = CTL_KERN; 155 name[namelen++] = KERN_PROC2; 156 name[namelen++] = KERN_PROC_PID; 157 name[namelen++] = BPFEXT(bde_pid); 158 name[namelen++] = szproc; 159 name[namelen++] = 1; 160 161 if (sysctl(&name[0], namelen, &p, &szproc, 162 NULL, 0) == -1) 163 printf("-\n"); 164 else 165 printf("%s\n", p.p_comm); 166 #undef BPFEXT 167 } 168 } else { 169 /* XXX */ 170 errx(1, "bpf_dump not implemented using kvm"); 171 } 172 } 173