560a54e10c
- BIOCGDIRECTION and BIOCSDIRECTION get or set the setting determining whether incoming, outgoing, or all packets on the interface should be returned by BPF. Set to BPF_D_IN to see only incoming packets on the interface. Set to BPF_D_INOUT to see packets originating locally and remotely on the interface. Set to BPF_D_OUT to see only outgoing packets on the interface. This setting is initialized to BPF_D_INOUT by default. BIOCGSEESENT and BIOCSSEESENT are obsoleted by these but kept for backward compatibility. - BIOCFEEDBACK sets packet feedback mode. This allows injected packets to be fed back as input to the interface when output via the interface is successful. When BPF_D_INOUT direction is set, injected outgoing packet is not returned by BPF to avoid duplication. This flag is initialized to zero by default. Note that libpcap has been modified to support BPF_D_OUT direction for pcap_setdirection(3) and PCAP_D_OUT direction is functional now. Reviewed by: rwatson
129 lines
3.5 KiB
C
129 lines
3.5 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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* $FreeBSD$
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*/
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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/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;
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char *pname, flagbuf[12];
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size_t size;
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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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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 (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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printf("%5d %6s %7s %9lu %9lu %9lu %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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