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      1 /*	$NetBSD: pfsync.c,v 1.5 2022/09/02 06:25:43 msaitoh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: pfsync.c,v 1.5 2022/09/02 06:25:43 msaitoh Exp $");
     35 #endif /* not lint */
     36 
     37 #define	_CALLOUT_PRIVATE	/* for defs in sys/callout.h */
     38 
     39 #include <sys/param.h>
     40 #include <sys/queue.h>
     41 #include <sys/socket.h>
     42 #include <sys/socketvar.h>
     43 #include <sys/mbuf.h>
     44 #include <sys/protosw.h>
     45 #include <sys/sysctl.h>
     46 
     47 #include <net/if_arp.h>
     48 #include <net/route.h>
     49 #include <netinet/in.h>
     50 #include <netinet/in_systm.h>
     51 #include <netinet/ip.h>
     52 #include <netinet/in_pcb.h>
     53 #include <netinet/ip_icmp.h>
     54 
     55 #ifdef INET6
     56 #include <netinet/ip6.h>
     57 #endif
     58 
     59 #include <net/pfvar.h>
     60 #include <net/if_pfsync.h>
     61 
     62 #include <arpa/inet.h>
     63 #include <kvm.h>
     64 #include <netdb.h>
     65 #include <stdio.h>
     66 #include <string.h>
     67 #include <unistd.h>
     68 #include <stdlib.h>
     69 #include <err.h>
     70 #include <errno.h>
     71 #include "netstat.h"
     72 #include "prog_ops.h"
     73 
     74 /*
     75  * Dump PFSYNC statistics structure.
     76  */
     77 void
     78 pfsync_stats(u_long off, const char *name)
     79 {
     80 	uint64_t pfsyncstat[PFSYNC_NSTATS];
     81 
     82 	if (use_sysctl) {
     83 		size_t size = sizeof(pfsyncstat);
     84 
     85 		if (prog_sysctlbyname("net.inet.pfsync.stats", pfsyncstat,
     86 		    &size, NULL, 0) == -1 && errno != ENOMEM)
     87 			return;
     88 	} else {
     89 		warnx("%s stats not available via KVM.", name);
     90 		return;
     91 	}
     92 
     93 	printf("%s:\n", name);
     94 
     95 #define p(f, m) if (pfsyncstat[f] || sflag <= 1) \
     96 	printf(m, pfsyncstat[f], plural(pfsyncstat[f]))
     97 #define p2(f, m) if (pfsyncstat[f] || sflag <= 1) \
     98 	printf(m, pfsyncstat[f])
     99 
    100 	p(PFSYNC_STAT_IPACKETS, "\t%" PRIu64 " packet%s received (IPv4)\n");
    101 	p(PFSYNC_STAT_IPACKETS6,"\t%" PRIu64 " packet%s received (IPv6)\n");
    102 	p(PFSYNC_STAT_BADIF,
    103 	    "\t\t%" PRIu64 " packet%s discarded for bad interface\n");
    104 	p(PFSYNC_STAT_BADTTL,
    105 	    "\t\t%" PRIu64 " packet%s discarded for bad ttl\n");
    106 	p(PFSYNC_STAT_HDROPS,
    107 	    "\t\t%" PRIu64 " packet%s shorter than header\n");
    108 	p(PFSYNC_STAT_BADVER,
    109 	    "\t\t%" PRIu64 " packet%s discarded for bad version\n");
    110 	p(PFSYNC_STAT_BADAUTH,
    111 	    "\t\t%" PRIu64 " packet%s discarded for bad HMAC\n");
    112 	p(PFSYNC_STAT_BADACT,
    113 	    "\t\t%" PRIu64 " packet%s discarded for bad action\n");
    114 	p(PFSYNC_STAT_BADLEN,
    115 	    "\t\t%" PRIu64 " packet%s discarded for short packet\n");
    116 	p(PFSYNC_STAT_BADVAL,
    117 	    "\t\t%" PRIu64 " state%s discarded for bad values\n");
    118 	p(PFSYNC_STAT_STALE,
    119 	    "\t\t%" PRIu64 " stale state%s\n");
    120 	p(PFSYNC_STAT_BADSTATE,
    121 	    "\t\t%" PRIu64 " failed state lookup/insert%s\n");
    122 	p(PFSYNC_STAT_OPACKETS,
    123 	    "\t%" PRIu64 " packet%s sent (IPv4)\n");
    124 	p(PFSYNC_STAT_OPACKETS6,
    125 	    "\t%" PRIu64 " packet%s sent (IPv6)\n");
    126 	p2(PFSYNC_STAT_ONOMEM,
    127 	    "\t\t%" PRIu64 " send failed due to mbuf memory error\n");
    128 	p2(PFSYNC_STAT_OERRORS,
    129 	    "\t\t%" PRIu64 " send error\n");
    130 #undef p
    131 #undef p2
    132 }
    133