diff options
Diffstat (limited to 'usr.bin/netstat/bpf.c')
| -rw-r--r-- | usr.bin/netstat/bpf.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/usr.bin/netstat/bpf.c b/usr.bin/netstat/bpf.c new file mode 100644 index 0000000..2ffeacb --- /dev/null +++ b/usr.bin/netstat/bpf.c @@ -0,0 +1,142 @@ +/*- + * Copyright (c) 2005 Christian S.J. Peron + * All rights reserved. + * + * 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 AUTHOR 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 AUTHOR 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sysctl.h> +#include <sys/param.h> +#include <sys/user.h> + +#include <net/if.h> +#include <net/if_var.h> +#include <net/bpf.h> +#include <net/bpfdesc.h> +#include <arpa/inet.h> + +#include <err.h> +#include <errno.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "netstat.h" + +/* print bpf stats */ + +static char * +bpf_pidname(pid_t pid) +{ + struct kinfo_proc newkp; + int error, mib[4]; + size_t size; + + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_PID; + mib[3] = pid; + size = sizeof(newkp); + error = sysctl(mib, 4, &newkp, &size, NULL, 0); + if (error < 0) { + warn("kern.proc.pid failed"); + return (strdup("??????")); + } + return (strdup(newkp.ki_comm)); +} + +static void +bpf_flags(struct xbpf_d *bd, char *flagbuf) +{ + + *flagbuf++ = bd->bd_promisc ? 'p' : '-'; + *flagbuf++ = bd->bd_immediate ? 'i' : '-'; + *flagbuf++ = bd->bd_hdrcmplt ? '-' : 'f'; + *flagbuf++ = (bd->bd_direction == BPF_D_IN) ? '-' : + ((bd->bd_direction == BPF_D_OUT) ? 'o' : 's'); + *flagbuf++ = bd->bd_feedback ? 'b' : '-'; + *flagbuf++ = bd->bd_async ? 'a' : '-'; + *flagbuf++ = bd->bd_locked ? 'l' : '-'; + *flagbuf++ = '\0'; +} + +void +bpf_stats(char *ifname) +{ + struct xbpf_d *d, *bd, zerostat; + char *pname, flagbuf[12]; + size_t size; + + if (zflag) { + bzero(&zerostat, sizeof(zerostat)); + if (sysctlbyname("net.bpf.stats", NULL, NULL, + &zerostat, sizeof(zerostat)) < 0) + warn("failed to zero bpf counters"); + return; + } + if (sysctlbyname("net.bpf.stats", NULL, &size, + NULL, 0) < 0) { + warn("net.bpf.stats"); + return; + } + if (size == 0) + return; + bd = malloc(size); + if (bd == NULL) { + warn("malloc failed"); + return; + } + if (sysctlbyname("net.bpf.stats", bd, &size, + NULL, 0) < 0) { + warn("net.bpf.stats"); + free(bd); + return; + } + (void) printf("%5s %6s %7s %9s %9s %9s %5s %5s %s\n", + "Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen", + "Hblen", "Command"); + for (d = &bd[0]; d < &bd[size / sizeof(*d)]; d++) { + if (d->bd_structsize != sizeof(*d)) { + warnx("bpf_stats_extended: version mismatch"); + return; + } + if (ifname && strcmp(ifname, d->bd_ifname) != 0) + continue; + bpf_flags(d, flagbuf); + pname = bpf_pidname(d->bd_pid); + (void) printf("%5d %6s %7s %9ju %9ju %9ju %5d %5d %s\n", + d->bd_pid, d->bd_ifname, flagbuf, + d->bd_rcount, d->bd_dcount, d->bd_fcount, + d->bd_slen, d->bd_hlen, pname); + free(pname); + } + free(bd); +} |
