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0e37f3e196
Add necessary changes to the kernel for this (basically introduce a bpf_zero_counters() function). As well, update the man page. MFC after: 1 month Discussed with: rwatson
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/*-
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* Copyright (c) 2005 Christian S.J. Peron
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/bpf.h>
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#include <net/bpfdesc.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <errno.h>
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#include <stdint.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 "netstat.h"
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/* print bpf stats */
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static char *
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bpf_pidname(pid_t pid)
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{
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struct kinfo_proc newkp;
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int error, mib[4];
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size_t size;
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_PID;
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mib[3] = pid;
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size = sizeof(newkp);
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error = sysctl(mib, 4, &newkp, &size, NULL, 0);
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if (error < 0) {
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warn("kern.proc.pid failed");
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return (strdup("??????"));
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}
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return (strdup(newkp.ki_comm));
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}
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static void
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bpf_flags(struct xbpf_d *bd, char *flagbuf)
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{
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*flagbuf++ = bd->bd_promisc ? 'p' : '-';
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*flagbuf++ = bd->bd_immediate ? 'i' : '-';
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*flagbuf++ = bd->bd_hdrcmplt ? '-' : 'f';
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*flagbuf++ = (bd->bd_direction == BPF_D_IN) ? '-' :
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((bd->bd_direction == BPF_D_OUT) ? 'o' : 's');
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*flagbuf++ = bd->bd_feedback ? 'b' : '-';
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*flagbuf++ = bd->bd_async ? 'a' : '-';
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*flagbuf++ = bd->bd_locked ? 'l' : '-';
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*flagbuf++ = '\0';
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}
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void
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bpf_stats(char *ifname)
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{
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struct xbpf_d *d, *bd, zerostat;
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char *pname, flagbuf[12];
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size_t size;
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if (zflag) {
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bzero(&zerostat, sizeof(zerostat));
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if (sysctlbyname("net.bpf.stats", NULL, NULL,
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&zerostat, sizeof(zerostat)) < 0)
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warn("failed to zero bpf counters");
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return;
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}
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if (sysctlbyname("net.bpf.stats", NULL, &size,
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NULL, 0) < 0) {
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warn("net.bpf.stats");
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return;
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}
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if (size == 0)
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return;
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bd = malloc(size);
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if (bd == NULL) {
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warn("malloc failed");
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return;
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}
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if (sysctlbyname("net.bpf.stats", bd, &size,
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NULL, 0) < 0) {
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warn("net.bpf.stats");
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free(bd);
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return;
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}
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(void) printf("%5s %6s %7s %9s %9s %9s %5s %5s %s\n",
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"Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen",
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"Hblen", "Command");
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for (d = &bd[0]; d < &bd[size / sizeof(*d)]; d++) {
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if (d->bd_structsize != sizeof(*d)) {
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warnx("bpf_stats_extended: version mismatch");
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return;
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}
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if (ifname && strcmp(ifname, d->bd_ifname) != 0)
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continue;
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bpf_flags(d, flagbuf);
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pname = bpf_pidname(d->bd_pid);
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(void) printf("%5d %6s %7s %9ju %9ju %9ju %5d %5d %s\n",
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d->bd_pid, d->bd_ifname, flagbuf,
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d->bd_rcount, d->bd_dcount, d->bd_fcount,
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d->bd_slen, d->bd_hlen, pname);
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free(pname);
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}
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free(bd);
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}
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