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/* $NetBSD: bpf.c,v 1.11 2012/12/14 08:15:44 msaitoh Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Rui Paulo.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <net/bpfdesc.h>
#include <net/bpf.h>
#include "netstat.h"
#include "prog_ops.h"
void
bpf_stats(void)
{
struct bpf_stat bpf_s;
size_t len = sizeof(bpf_s);
if (use_sysctl) {
if (sysctlbyname("net.bpf.stats", &bpf_s, &len, NULL, 0) == -1)
err(1, "net.bpf.stats");
printf("bpf:\n");
printf("\t%" PRIu64 " total packets received\n",
bpf_s.bs_recv);
printf("\t%" PRIu64 " total packets captured\n",
bpf_s.bs_capt);
printf("\t%" PRIu64 " total packets dropped\n",
bpf_s.bs_drop);
} else {
warnx("BPF stats not available via KVM.");
}
}
void
bpf_dump(const char *bpfif)
{
struct bpf_d_ext *dpe;
if (use_sysctl) {
int name[CTL_MAXNAME], rc;
size_t i, sz, szproc;
u_int namelen;
void *v;
struct kinfo_proc2 p;
/* adapted from sockstat.c by Andrew Brown */
sz = CTL_MAXNAME;
if (sysctlnametomib("net.bpf.peers", &name[0], &sz) == -1)
err(1, "sysctlnametomib: net.bpf.peers");
namelen = sz;
name[namelen++] = sizeof(*dpe);
name[namelen++] = INT_MAX;
v = NULL;
sz = 0;
do {
rc = prog_sysctl(&name[0], namelen,
v, &sz, NULL, 0);
if (rc == -1 && errno != ENOMEM)
err(1, "sysctl: net.bpf.peers");
if (rc == -1 && v != NULL) {
free(v);
v = NULL;
}
if (v == NULL) {
v = malloc(sz);
rc = -1;
}
if (v == NULL)
err(1, "malloc");
} while (rc == -1);
dpe = v;
puts("Active BPF peers\nPID\tInt\tRecv Drop Capt" \
" Flags Bufsize Comm");
#define BPFEXT(entry) dpe->entry
for (i = 0; i < (sz / sizeof(*dpe)); i++, dpe++) {
if (bpfif &&
strncmp(BPFEXT(bde_ifname), bpfif, IFNAMSIZ))
continue;
printf("%-7d ", BPFEXT(bde_pid));
printf("%-7s ",
(BPFEXT(bde_ifname)[0] == '\0') ? "-" :
BPFEXT(bde_ifname));
printf("%-8" PRIu64 " %-8" PRIu64 " %-8" PRIu64 " ",
BPFEXT(bde_rcount), BPFEXT(bde_dcount),
BPFEXT(bde_ccount));
switch (BPFEXT(bde_state)) {
case BPF_IDLE:
printf("I");
break;
case BPF_WAITING:
printf("W");
break;
case BPF_TIMED_OUT:
printf("T");
break;
default:
printf("-");
break;
}
printf("%c", BPFEXT(bde_promisc) ? 'P' : '-');
printf("%c", BPFEXT(bde_immediate) ? 'R' : '-');
printf("%c", BPFEXT(bde_seesent) ? 'S' : '-');
printf("%c", BPFEXT(bde_hdrcmplt) ? 'H' : '-');
printf(" %-8d ", BPFEXT(bde_bufsize));
szproc = sizeof(p);
namelen = 0;
name[namelen++] = CTL_KERN;
name[namelen++] = KERN_PROC2;
name[namelen++] = KERN_PROC_PID;
name[namelen++] = BPFEXT(bde_pid);
name[namelen++] = szproc;
name[namelen++] = 1;
if (prog_sysctl(&name[0], namelen, &p, &szproc,
NULL, 0) == -1)
printf("-\n");
else
printf("%s\n", p.p_comm);
#undef BPFEXT
}
free(v);
} else {
/* XXX */
errx(1, "bpf_dump not implemented using kvm");
}
}
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