177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/* $NetBSD: bpf.c,v 1.13 2018/06/26 09:50:42 msaitoh Exp $ */
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/*
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Rui Paulo.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <net/if.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <net/bpfdesc.h>
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#include <net/bpf.h>
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#include "netstat.h"
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#include "prog_ops.h"
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void
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bpf_stats(void)
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{
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struct bpf_stat bpf_s;
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size_t len = sizeof(bpf_s);
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if (use_sysctl) {
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if (sysctlbyname("net.bpf.stats", &bpf_s, &len, NULL, 0) == -1)
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err(1, "net.bpf.stats");
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printf("bpf:\n");
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printf("\t%" PRIu64 " total packets received\n",
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bpf_s.bs_recv);
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printf("\t%" PRIu64 " total packets captured\n",
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bpf_s.bs_capt);
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printf("\t%" PRIu64 " total packets dropped\n",
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bpf_s.bs_drop);
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} else {
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warnx("BPF stats not available via KVM.");
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}
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}
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void
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bpf_dump(const char *bpfif)
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{
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struct bpf_d_ext *dpe;
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if (use_sysctl) {
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int name[CTL_MAXNAME], rc;
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size_t i, sz, szproc;
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u_int namelen;
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void *v;
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struct kinfo_proc2 p;
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/* adapted from sockstat.c by Andrew Brown */
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sz = CTL_MAXNAME;
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if (sysctlnametomib("net.bpf.peers", &name[0], &sz) == -1)
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err(1, "sysctlnametomib: net.bpf.peers");
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namelen = sz;
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name[namelen++] = sizeof(*dpe);
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name[namelen++] = INT_MAX;
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v = NULL;
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sz = 0;
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do {
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rc = prog_sysctl(&name[0], namelen,
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v, &sz, NULL, 0);
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if (rc == -1 && errno != ENOMEM)
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err(1, "sysctl: net.bpf.peers");
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if (rc == -1 && v != NULL) {
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free(v);
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v = NULL;
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}
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if (v == NULL) {
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v = malloc(sz);
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rc = -1;
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}
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if (v == NULL)
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err(1, "malloc");
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} while (rc == -1);
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dpe = v;
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puts("Active BPF peers\nPID\tInt\tRecv Drop Capt" \
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" Flags Bufsize Comm");
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#define BPFEXT(entry) dpe->entry
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for (i = 0; i < (sz / sizeof(*dpe)); i++, dpe++) {
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if (bpfif &&
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strncmp(BPFEXT(bde_ifname), bpfif, IFNAMSIZ))
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continue;
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printf("%-7d ", BPFEXT(bde_pid));
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printf("%-7s ",
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(BPFEXT(bde_ifname)[0] == '\0') ? "-" :
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BPFEXT(bde_ifname));
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printf("%-8" PRIu64 " %-8" PRIu64 " %-8" PRIu64 " ",
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BPFEXT(bde_rcount), BPFEXT(bde_dcount),
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BPFEXT(bde_ccount));
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switch (BPFEXT(bde_state)) {
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case BPF_IDLE:
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printf("I");
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break;
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case BPF_WAITING:
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printf("W");
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break;
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case BPF_TIMED_OUT:
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printf("T");
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break;
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default:
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printf("-");
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break;
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}
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printf("%c", BPFEXT(bde_promisc) ? 'P' : '-');
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printf("%c", BPFEXT(bde_immediate) ? 'R' : '-');
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printf("%c", (BPFEXT(bde_direction) == BPF_D_IN) ? '-'
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: (BPFEXT(bde_direction) == BPF_D_OUT) ? 'O' : 'S');
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printf("%c", BPFEXT(bde_hdrcmplt) ? 'H' : '-');
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printf(" %-8d ", BPFEXT(bde_bufsize));
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szproc = sizeof(p);
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namelen = 0;
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name[namelen++] = CTL_KERN;
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name[namelen++] = KERN_PROC2;
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name[namelen++] = KERN_PROC_PID;
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name[namelen++] = BPFEXT(bde_pid);
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name[namelen++] = szproc;
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name[namelen++] = 1;
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if (prog_sysctl(&name[0], namelen, &p, &szproc,
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NULL, 0) == -1)
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printf("-\n");
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else
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printf("%s\n", p.p_comm);
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#undef BPFEXT
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}
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free(v);
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} else {
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/* XXX */
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errx(1, "bpf_dump not implemented using kvm");
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}
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}
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