1 /*-
2 * Copyright (c) 2005 Christian S.J. Peron
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/types.h>
31 #include <sys/protosw.h>
32 #include <sys/socket.h>
33 #include <sys/socketvar.h>
34 #include <sys/sysctl.h>
35 #include <sys/param.h>
36 #include <sys/user.h>
37
38 #include <net/if.h>
39 #include <net/if_var.h>
40 #include <net/bpf.h>
41 #include <net/bpfdesc.h>
42 #include <arpa/inet.h>
43
44 #include <err.h>
45 #include <errno.h>
46 #include <stdint.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <unistd.h>
51
52 #include "netstat.h"
53
54 /* print bpf stats */
55
56 static char *
bpf_pidname(pid_t pid)57 bpf_pidname(pid_t pid)
58 {
59 struct kinfo_proc newkp;
60 int error, mib[4];
61 size_t size;
62
63 mib[0] = CTL_KERN;
64 mib[1] = KERN_PROC;
65 mib[2] = KERN_PROC_PID;
66 mib[3] = pid;
67 size = sizeof(newkp);
68 error = sysctl(mib, 4, &newkp, &size, NULL, 0);
69 if (error < 0) {
70 warn("kern.proc.pid failed");
71 return (strdup("??????"));
72 }
73 return (strdup(newkp.ki_comm));
74 }
75
76 static void
bpf_flags(struct xbpf_d * bd,char * flagbuf)77 bpf_flags(struct xbpf_d *bd, char *flagbuf)
78 {
79
80 *flagbuf++ = bd->bd_promisc ? 'p' : '-';
81 *flagbuf++ = bd->bd_immediate ? 'i' : '-';
82 *flagbuf++ = bd->bd_hdrcmplt ? '-' : 'f';
83 *flagbuf++ = (bd->bd_direction == BPF_D_IN) ? '-' :
84 ((bd->bd_direction == BPF_D_OUT) ? 'o' : 's');
85 *flagbuf++ = bd->bd_feedback ? 'b' : '-';
86 *flagbuf++ = bd->bd_async ? 'a' : '-';
87 *flagbuf++ = bd->bd_locked ? 'l' : '-';
88 *flagbuf++ = '\0';
89 }
90
91 void
bpf_stats(char * ifname)92 bpf_stats(char *ifname)
93 {
94 struct xbpf_d *d, *bd, zerostat;
95 char *pname, flagbuf[12];
96 size_t size;
97
98 if (zflag) {
99 bzero(&zerostat, sizeof(zerostat));
100 if (sysctlbyname("net.bpf.stats", NULL, NULL,
101 &zerostat, sizeof(zerostat)) < 0)
102 warn("failed to zero bpf counters");
103 return;
104 }
105 if (sysctlbyname("net.bpf.stats", NULL, &size,
106 NULL, 0) < 0) {
107 warn("net.bpf.stats");
108 return;
109 }
110 if (size == 0)
111 return;
112 bd = malloc(size);
113 if (bd == NULL) {
114 warn("malloc failed");
115 return;
116 }
117 if (sysctlbyname("net.bpf.stats", bd, &size,
118 NULL, 0) < 0) {
119 warn("net.bpf.stats");
120 free(bd);
121 return;
122 }
123 (void) printf("%5s %6s %7s %9s %9s %9s %5s %5s %s\n",
124 "Pid", "Netif", "Flags", "Recv", "Drop", "Match", "Sblen",
125 "Hblen", "Command");
126 for (d = &bd[0]; d < &bd[size / sizeof(*d)]; d++) {
127 if (d->bd_structsize != sizeof(*d)) {
128 warnx("bpf_stats_extended: version mismatch");
129 return;
130 }
131 if (ifname && strcmp(ifname, d->bd_ifname) != 0)
132 continue;
133 bpf_flags(d, flagbuf);
134 pname = bpf_pidname(d->bd_pid);
135 (void) printf("%5d %6s %7s %9ju %9ju %9ju %5d %5d %s\n",
136 d->bd_pid, d->bd_ifname, flagbuf,
137 d->bd_rcount, d->bd_dcount, d->bd_fcount,
138 d->bd_slen, d->bd_hlen, pname);
139 free(pname);
140 }
141 free(bd);
142 }
143