xref: /minix3/usr.bin/netstat/bpf.c (revision 66dfcc8533c70ea68511edc95c03189c8eb0a7a2)
1*66dfcc85SDavid van Moolenbroek /*	$NetBSD: bpf.c,v 1.11 2012/12/14 08:15:44 msaitoh Exp $	*/
2*66dfcc85SDavid van Moolenbroek 
3*66dfcc85SDavid van Moolenbroek /*
4*66dfcc85SDavid van Moolenbroek  * Copyright (c) 2005 The NetBSD Foundation, Inc.
5*66dfcc85SDavid van Moolenbroek  * All rights reserved.
6*66dfcc85SDavid van Moolenbroek  *
7*66dfcc85SDavid van Moolenbroek  * This code is derived from software contributed to The NetBSD Foundation
8*66dfcc85SDavid van Moolenbroek  * by Rui Paulo.
9*66dfcc85SDavid van Moolenbroek  *
10*66dfcc85SDavid van Moolenbroek  * Redistribution and use in source and binary forms, with or without
11*66dfcc85SDavid van Moolenbroek  * modification, are permitted provided that the following conditions
12*66dfcc85SDavid van Moolenbroek  * are met:
13*66dfcc85SDavid van Moolenbroek  * 1. Redistributions of source code must retain the above copyright
14*66dfcc85SDavid van Moolenbroek  *    notice, this list of conditions and the following disclaimer.
15*66dfcc85SDavid van Moolenbroek  * 2. Redistributions in binary form must reproduce the above copyright
16*66dfcc85SDavid van Moolenbroek  *    notice, this list of conditions and the following disclaimer in the
17*66dfcc85SDavid van Moolenbroek  *    documentation and/or other materials provided with the distribution.
18*66dfcc85SDavid van Moolenbroek  *
19*66dfcc85SDavid van Moolenbroek  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*66dfcc85SDavid van Moolenbroek  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*66dfcc85SDavid van Moolenbroek  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*66dfcc85SDavid van Moolenbroek  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*66dfcc85SDavid van Moolenbroek  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*66dfcc85SDavid van Moolenbroek  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*66dfcc85SDavid van Moolenbroek  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*66dfcc85SDavid van Moolenbroek  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*66dfcc85SDavid van Moolenbroek  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*66dfcc85SDavid van Moolenbroek  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*66dfcc85SDavid van Moolenbroek  * POSSIBILITY OF SUCH DAMAGE.
30*66dfcc85SDavid van Moolenbroek  */
31*66dfcc85SDavid van Moolenbroek 
32*66dfcc85SDavid van Moolenbroek #include <err.h>
33*66dfcc85SDavid van Moolenbroek #include <errno.h>
34*66dfcc85SDavid van Moolenbroek #include <fcntl.h>
35*66dfcc85SDavid van Moolenbroek #include <kvm.h>
36*66dfcc85SDavid van Moolenbroek #include <stdio.h>
37*66dfcc85SDavid van Moolenbroek #include <stdlib.h>
38*66dfcc85SDavid van Moolenbroek #include <string.h>
39*66dfcc85SDavid van Moolenbroek #include <unistd.h>
40*66dfcc85SDavid van Moolenbroek #include <net/if.h>
41*66dfcc85SDavid van Moolenbroek #include <sys/types.h>
42*66dfcc85SDavid van Moolenbroek #include <sys/param.h>
43*66dfcc85SDavid van Moolenbroek #include <sys/sysctl.h>
44*66dfcc85SDavid van Moolenbroek #include <net/bpfdesc.h>
45*66dfcc85SDavid van Moolenbroek #include <net/bpf.h>
46*66dfcc85SDavid van Moolenbroek #include "netstat.h"
47*66dfcc85SDavid van Moolenbroek #include "prog_ops.h"
48*66dfcc85SDavid van Moolenbroek 
49*66dfcc85SDavid van Moolenbroek void
bpf_stats(void)50*66dfcc85SDavid van Moolenbroek bpf_stats(void)
51*66dfcc85SDavid van Moolenbroek {
52*66dfcc85SDavid van Moolenbroek 	struct bpf_stat bpf_s;
53*66dfcc85SDavid van Moolenbroek 	size_t len = sizeof(bpf_s);
54*66dfcc85SDavid van Moolenbroek 
55*66dfcc85SDavid van Moolenbroek 	if (use_sysctl) {
56*66dfcc85SDavid van Moolenbroek 		if (sysctlbyname("net.bpf.stats", &bpf_s, &len, NULL, 0) == -1)
57*66dfcc85SDavid van Moolenbroek 			err(1, "net.bpf.stats");
58*66dfcc85SDavid van Moolenbroek 
59*66dfcc85SDavid van Moolenbroek 		printf("bpf:\n");
60*66dfcc85SDavid van Moolenbroek 		printf("\t%" PRIu64 " total packets received\n",
61*66dfcc85SDavid van Moolenbroek 		    bpf_s.bs_recv);
62*66dfcc85SDavid van Moolenbroek 		printf("\t%" PRIu64 " total packets captured\n",
63*66dfcc85SDavid van Moolenbroek 		    bpf_s.bs_capt);
64*66dfcc85SDavid van Moolenbroek 		printf("\t%" PRIu64 " total packets dropped\n",
65*66dfcc85SDavid van Moolenbroek 		    bpf_s.bs_drop);
66*66dfcc85SDavid van Moolenbroek 	} else {
67*66dfcc85SDavid van Moolenbroek 		warnx("BPF stats not available via KVM.");
68*66dfcc85SDavid van Moolenbroek 	}
69*66dfcc85SDavid van Moolenbroek }
70*66dfcc85SDavid van Moolenbroek 
71*66dfcc85SDavid van Moolenbroek void
bpf_dump(const char * bpfif)72*66dfcc85SDavid van Moolenbroek bpf_dump(const char *bpfif)
73*66dfcc85SDavid van Moolenbroek {
74*66dfcc85SDavid van Moolenbroek 	struct bpf_d_ext *dpe;
75*66dfcc85SDavid van Moolenbroek 
76*66dfcc85SDavid van Moolenbroek 	if (use_sysctl) {
77*66dfcc85SDavid van Moolenbroek 		int	name[CTL_MAXNAME], rc;
78*66dfcc85SDavid van Moolenbroek 		size_t	i, sz, szproc;
79*66dfcc85SDavid van Moolenbroek 		u_int	namelen;
80*66dfcc85SDavid van Moolenbroek 		void	*v;
81*66dfcc85SDavid van Moolenbroek 		struct kinfo_proc2 p;
82*66dfcc85SDavid van Moolenbroek 
83*66dfcc85SDavid van Moolenbroek 		/* adapted from sockstat.c by Andrew Brown */
84*66dfcc85SDavid van Moolenbroek 
85*66dfcc85SDavid van Moolenbroek 		sz = CTL_MAXNAME;
86*66dfcc85SDavid van Moolenbroek 		if (sysctlnametomib("net.bpf.peers", &name[0], &sz) == -1)
87*66dfcc85SDavid van Moolenbroek 			err(1, "sysctlnametomib: net.bpf.peers");
88*66dfcc85SDavid van Moolenbroek 		namelen = sz;
89*66dfcc85SDavid van Moolenbroek 
90*66dfcc85SDavid van Moolenbroek 		name[namelen++] = sizeof(*dpe);
91*66dfcc85SDavid van Moolenbroek 		name[namelen++] = INT_MAX;
92*66dfcc85SDavid van Moolenbroek 
93*66dfcc85SDavid van Moolenbroek 		v = NULL;
94*66dfcc85SDavid van Moolenbroek 		sz = 0;
95*66dfcc85SDavid van Moolenbroek 		do {
96*66dfcc85SDavid van Moolenbroek 			rc = prog_sysctl(&name[0], namelen,
97*66dfcc85SDavid van Moolenbroek 			    v, &sz, NULL, 0);
98*66dfcc85SDavid van Moolenbroek 			if (rc == -1 && errno != ENOMEM)
99*66dfcc85SDavid van Moolenbroek 				err(1, "sysctl: net.bpf.peers");
100*66dfcc85SDavid van Moolenbroek 			if (rc == -1 && v != NULL) {
101*66dfcc85SDavid van Moolenbroek 				free(v);
102*66dfcc85SDavid van Moolenbroek 				v = NULL;
103*66dfcc85SDavid van Moolenbroek 			}
104*66dfcc85SDavid van Moolenbroek 			if (v == NULL) {
105*66dfcc85SDavid van Moolenbroek 				v = malloc(sz);
106*66dfcc85SDavid van Moolenbroek 				rc = -1;
107*66dfcc85SDavid van Moolenbroek 			}
108*66dfcc85SDavid van Moolenbroek 			if (v == NULL)
109*66dfcc85SDavid van Moolenbroek 				err(1, "malloc");
110*66dfcc85SDavid van Moolenbroek 		} while (rc == -1);
111*66dfcc85SDavid van Moolenbroek 
112*66dfcc85SDavid van Moolenbroek 		dpe = v;
113*66dfcc85SDavid van Moolenbroek 
114*66dfcc85SDavid van Moolenbroek 		puts("Active BPF peers\nPID\tInt\tRecv     Drop     Capt" \
115*66dfcc85SDavid van Moolenbroek 		    "     Flags  Bufsize  Comm");
116*66dfcc85SDavid van Moolenbroek 
117*66dfcc85SDavid van Moolenbroek #define BPFEXT(entry) dpe->entry
118*66dfcc85SDavid van Moolenbroek 
119*66dfcc85SDavid van Moolenbroek 		for (i = 0; i < (sz / sizeof(*dpe)); i++, dpe++) {
120*66dfcc85SDavid van Moolenbroek 			if (bpfif &&
121*66dfcc85SDavid van Moolenbroek 			    strncmp(BPFEXT(bde_ifname), bpfif, IFNAMSIZ))
122*66dfcc85SDavid van Moolenbroek 				continue;
123*66dfcc85SDavid van Moolenbroek 
124*66dfcc85SDavid van Moolenbroek 			printf("%-7d ", BPFEXT(bde_pid));
125*66dfcc85SDavid van Moolenbroek 			printf("%-7s ",
126*66dfcc85SDavid van Moolenbroek 			       (BPFEXT(bde_ifname)[0] == '\0') ? "-" :
127*66dfcc85SDavid van Moolenbroek 			       BPFEXT(bde_ifname));
128*66dfcc85SDavid van Moolenbroek 
129*66dfcc85SDavid van Moolenbroek 			printf("%-8" PRIu64 " %-8" PRIu64 " %-8" PRIu64 " ",
130*66dfcc85SDavid van Moolenbroek 				BPFEXT(bde_rcount), BPFEXT(bde_dcount),
131*66dfcc85SDavid van Moolenbroek 				BPFEXT(bde_ccount));
132*66dfcc85SDavid van Moolenbroek 
133*66dfcc85SDavid van Moolenbroek 			switch (BPFEXT(bde_state)) {
134*66dfcc85SDavid van Moolenbroek 			case BPF_IDLE:
135*66dfcc85SDavid van Moolenbroek 				printf("I");
136*66dfcc85SDavid van Moolenbroek 				break;
137*66dfcc85SDavid van Moolenbroek 			case BPF_WAITING:
138*66dfcc85SDavid van Moolenbroek 				printf("W");
139*66dfcc85SDavid van Moolenbroek 				break;
140*66dfcc85SDavid van Moolenbroek 			case BPF_TIMED_OUT:
141*66dfcc85SDavid van Moolenbroek 				printf("T");
142*66dfcc85SDavid van Moolenbroek 				break;
143*66dfcc85SDavid van Moolenbroek 			default:
144*66dfcc85SDavid van Moolenbroek 				printf("-");
145*66dfcc85SDavid van Moolenbroek 				break;
146*66dfcc85SDavid van Moolenbroek 			}
147*66dfcc85SDavid van Moolenbroek 
148*66dfcc85SDavid van Moolenbroek 			printf("%c", BPFEXT(bde_promisc) ? 'P' : '-');
149*66dfcc85SDavid van Moolenbroek 			printf("%c", BPFEXT(bde_immediate) ? 'R' : '-');
150*66dfcc85SDavid van Moolenbroek 			printf("%c", BPFEXT(bde_seesent) ? 'S' : '-');
151*66dfcc85SDavid van Moolenbroek 			printf("%c", BPFEXT(bde_hdrcmplt) ? 'H' : '-');
152*66dfcc85SDavid van Moolenbroek 			printf("  %-8d ", BPFEXT(bde_bufsize));
153*66dfcc85SDavid van Moolenbroek 
154*66dfcc85SDavid van Moolenbroek 			szproc = sizeof(p);
155*66dfcc85SDavid van Moolenbroek 			namelen = 0;
156*66dfcc85SDavid van Moolenbroek 			name[namelen++] = CTL_KERN;
157*66dfcc85SDavid van Moolenbroek 			name[namelen++] = KERN_PROC2;
158*66dfcc85SDavid van Moolenbroek 			name[namelen++] = KERN_PROC_PID;
159*66dfcc85SDavid van Moolenbroek 			name[namelen++] = BPFEXT(bde_pid);
160*66dfcc85SDavid van Moolenbroek 			name[namelen++] = szproc;
161*66dfcc85SDavid van Moolenbroek 			name[namelen++] = 1;
162*66dfcc85SDavid van Moolenbroek 
163*66dfcc85SDavid van Moolenbroek 			if (prog_sysctl(&name[0], namelen, &p, &szproc,
164*66dfcc85SDavid van Moolenbroek 			    NULL, 0) == -1)
165*66dfcc85SDavid van Moolenbroek 				printf("-\n");
166*66dfcc85SDavid van Moolenbroek 			else
167*66dfcc85SDavid van Moolenbroek 				printf("%s\n", p.p_comm);
168*66dfcc85SDavid van Moolenbroek #undef BPFEXT
169*66dfcc85SDavid van Moolenbroek 		}
170*66dfcc85SDavid van Moolenbroek 		free(v);
171*66dfcc85SDavid van Moolenbroek 	} else {
172*66dfcc85SDavid van Moolenbroek                 /* XXX */
173*66dfcc85SDavid van Moolenbroek                 errx(1, "bpf_dump not implemented using kvm");
174*66dfcc85SDavid van Moolenbroek         }
175*66dfcc85SDavid van Moolenbroek }
176