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freebsd-dev/sbin/pfctl/pf_print_state.c
Ian Lepore 1cac26262e Make pfctl(8) work on strict-alignment platforms, by copying a pair of 
embedded structures out of a packed, unaligned struct into local copies
on the stack which are aligned.

The original patch to do this was submitted by Guy Yur <guyyur@gmail.com>,
and this is conceptually the same change, but restructured with the
#ifndef __NO_STRICT_ALIGNMENT wrapper, similar to how the same issue is
handled in the kernel pf code.

PR:		185617
PR:		206658
2016-01-30 22:03:14 +00:00

376 lines
9.6 KiB
C
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/* $OpenBSD: pf_print_state.c,v 1.52 2008/08/12 16:40:18 david Exp $ */
/*
* Copyright (c) 2001 Daniel Hartmeier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDERS 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/socket.h>
#include <sys/endian.h>
#include <net/if.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <net/pfvar.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "pfctl_parser.h"
#include "pfctl.h"
void print_name(struct pf_addr *, sa_family_t);
void
print_addr(struct pf_addr_wrap *addr, sa_family_t af, int verbose)
{
switch (addr->type) {
case PF_ADDR_DYNIFTL:
printf("(%s", addr->v.ifname);
if (addr->iflags & PFI_AFLAG_NETWORK)
printf(":network");
if (addr->iflags & PFI_AFLAG_BROADCAST)
printf(":broadcast");
if (addr->iflags & PFI_AFLAG_PEER)
printf(":peer");
if (addr->iflags & PFI_AFLAG_NOALIAS)
printf(":0");
if (verbose) {
if (addr->p.dyncnt <= 0)
printf(":*");
else
printf(":%d", addr->p.dyncnt);
}
printf(")");
break;
case PF_ADDR_TABLE:
if (verbose)
if (addr->p.tblcnt == -1)
printf("<%s:*>", addr->v.tblname);
else
printf("<%s:%d>", addr->v.tblname,
addr->p.tblcnt);
else
printf("<%s>", addr->v.tblname);
return;
case PF_ADDR_RANGE: {
char buf[48];
if (inet_ntop(af, &addr->v.a.addr, buf, sizeof(buf)) == NULL)
printf("?");
else
printf("%s", buf);
if (inet_ntop(af, &addr->v.a.mask, buf, sizeof(buf)) == NULL)
printf(" - ?");
else
printf(" - %s", buf);
break;
}
case PF_ADDR_ADDRMASK:
if (PF_AZERO(&addr->v.a.addr, AF_INET6) &&
PF_AZERO(&addr->v.a.mask, AF_INET6))
printf("any");
else {
char buf[48];
if (inet_ntop(af, &addr->v.a.addr, buf,
sizeof(buf)) == NULL)
printf("?");
else
printf("%s", buf);
}
break;
case PF_ADDR_NOROUTE:
printf("no-route");
return;
case PF_ADDR_URPFFAILED:
printf("urpf-failed");
return;
default:
printf("?");
return;
}
/* mask if not _both_ address and mask are zero */
if (addr->type != PF_ADDR_RANGE &&
!(PF_AZERO(&addr->v.a.addr, AF_INET6) &&
PF_AZERO(&addr->v.a.mask, AF_INET6))) {
int bits = unmask(&addr->v.a.mask, af);
if (bits != (af == AF_INET ? 32 : 128))
printf("/%d", bits);
}
}
void
print_name(struct pf_addr *addr, sa_family_t af)
{
char host[NI_MAXHOST];
strlcpy(host, "?", sizeof(host));
switch (af) {
case AF_INET: {
struct sockaddr_in sin;
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr = addr->v4;
getnameinfo((struct sockaddr *)&sin, sin.sin_len,
host, sizeof(host), NULL, 0, NI_NOFQDN);
break;
}
case AF_INET6: {
struct sockaddr_in6 sin6;
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_len = sizeof(sin6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = addr->v6;
getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
host, sizeof(host), NULL, 0, NI_NOFQDN);
break;
}
}
printf("%s", host);
}
void
print_host(struct pf_addr *addr, u_int16_t port, sa_family_t af, int opts)
{
if (opts & PF_OPT_USEDNS)
print_name(addr, af);
else {
struct pf_addr_wrap aw;
memset(&aw, 0, sizeof(aw));
aw.v.a.addr = *addr;
if (af == AF_INET)
aw.v.a.mask.addr32[0] = 0xffffffff;
else {
memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
af = AF_INET6;
}
print_addr(&aw, af, opts & PF_OPT_VERBOSE2);
}
if (port) {
if (af == AF_INET)
printf(":%u", ntohs(port));
else
printf("[%u]", ntohs(port));
}
}
void
print_seq(struct pfsync_state_peer *p)
{
if (p->seqdiff)
printf("[%u + %u](+%u)", ntohl(p->seqlo),
ntohl(p->seqhi) - ntohl(p->seqlo), ntohl(p->seqdiff));
else
printf("[%u + %u]", ntohl(p->seqlo),
ntohl(p->seqhi) - ntohl(p->seqlo));
}
void
print_state(struct pfsync_state *s, int opts)
{
struct pfsync_state_peer *src, *dst;
struct pfsync_state_key *key, *sk, *nk;
struct protoent *p;
int min, sec;
#ifndef __NO_STRICT_ALIGNMENT
struct pfsync_state_key aligned_key[2];
bcopy(&s->key, aligned_key, sizeof(aligned_key));
key = aligned_key;
#else
key = s->key;
#endif
if (s->direction == PF_OUT) {
src = &s->src;
dst = &s->dst;
sk = &key[PF_SK_STACK];
nk = &key[PF_SK_WIRE];
if (s->proto == IPPROTO_ICMP || s->proto == IPPROTO_ICMPV6)
sk->port[0] = nk->port[0];
} else {
src = &s->dst;
dst = &s->src;
sk = &key[PF_SK_WIRE];
nk = &key[PF_SK_STACK];
if (s->proto == IPPROTO_ICMP || s->proto == IPPROTO_ICMPV6)
sk->port[1] = nk->port[1];
}
printf("%s ", s->ifname);
if ((p = getprotobynumber(s->proto)) != NULL)
printf("%s ", p->p_name);
else
printf("%u ", s->proto);
print_host(&nk->addr[1], nk->port[1], s->af, opts);
if (PF_ANEQ(&nk->addr[1], &sk->addr[1], s->af) ||
nk->port[1] != sk->port[1]) {
printf(" (");
print_host(&sk->addr[1], sk->port[1], s->af, opts);
printf(")");
}
if (s->direction == PF_OUT)
printf(" -> ");
else
printf(" <- ");
print_host(&nk->addr[0], nk->port[0], s->af, opts);
if (PF_ANEQ(&nk->addr[0], &sk->addr[0], s->af) ||
nk->port[0] != sk->port[0]) {
printf(" (");
print_host(&sk->addr[0], sk->port[0], s->af, opts);
printf(")");
}
printf(" ");
if (s->proto == IPPROTO_TCP) {
if (src->state <= TCPS_TIME_WAIT &&
dst->state <= TCPS_TIME_WAIT)
printf(" %s:%s\n", tcpstates[src->state],
tcpstates[dst->state]);
else if (src->state == PF_TCPS_PROXY_SRC ||
dst->state == PF_TCPS_PROXY_SRC)
printf(" PROXY:SRC\n");
else if (src->state == PF_TCPS_PROXY_DST ||
dst->state == PF_TCPS_PROXY_DST)
printf(" PROXY:DST\n");
else
printf(" <BAD STATE LEVELS %u:%u>\n",
src->state, dst->state);
if (opts & PF_OPT_VERBOSE) {
printf(" ");
print_seq(src);
if (src->wscale && dst->wscale)
printf(" wscale %u",
src->wscale & PF_WSCALE_MASK);
printf(" ");
print_seq(dst);
if (src->wscale && dst->wscale)
printf(" wscale %u",
dst->wscale & PF_WSCALE_MASK);
printf("\n");
}
} else if (s->proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES &&
dst->state < PFUDPS_NSTATES) {
const char *states[] = PFUDPS_NAMES;
printf(" %s:%s\n", states[src->state], states[dst->state]);
#ifndef INET6
} else if (s->proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES &&
dst->state < PFOTHERS_NSTATES) {
#else
} else if (s->proto != IPPROTO_ICMP && s->proto != IPPROTO_ICMPV6 &&
src->state < PFOTHERS_NSTATES && dst->state < PFOTHERS_NSTATES) {
#endif
/* XXX ICMP doesn't really have state levels */
const char *states[] = PFOTHERS_NAMES;
printf(" %s:%s\n", states[src->state], states[dst->state]);
} else {
printf(" %u:%u\n", src->state, dst->state);
}
if (opts & PF_OPT_VERBOSE) {
u_int64_t packets[2];
u_int64_t bytes[2];
u_int32_t creation = ntohl(s->creation);
u_int32_t expire = ntohl(s->expire);
sec = creation % 60;
creation /= 60;
min = creation % 60;
creation /= 60;
printf(" age %.2u:%.2u:%.2u", creation, min, sec);
sec = expire % 60;
expire /= 60;
min = expire % 60;
expire /= 60;
printf(", expires in %.2u:%.2u:%.2u", expire, min, sec);
bcopy(s->packets[0], &packets[0], sizeof(u_int64_t));
bcopy(s->packets[1], &packets[1], sizeof(u_int64_t));
bcopy(s->bytes[0], &bytes[0], sizeof(u_int64_t));
bcopy(s->bytes[1], &bytes[1], sizeof(u_int64_t));
printf(", %ju:%ju pkts, %ju:%ju bytes",
(uintmax_t )be64toh(packets[0]),
(uintmax_t )be64toh(packets[1]),
(uintmax_t )be64toh(bytes[0]),
(uintmax_t )be64toh(bytes[1]));
if (ntohl(s->anchor) != -1)
printf(", anchor %u", ntohl(s->anchor));
if (ntohl(s->rule) != -1)
printf(", rule %u", ntohl(s->rule));
if (s->state_flags & PFSTATE_SLOPPY)
printf(", sloppy");
if (s->sync_flags & PFSYNC_FLAG_SRCNODE)
printf(", source-track");
if (s->sync_flags & PFSYNC_FLAG_NATSRCNODE)
printf(", sticky-address");
printf("\n");
}
if (opts & PF_OPT_VERBOSE2) {
u_int64_t id;
bcopy(&s->id, &id, sizeof(u_int64_t));
printf(" id: %016jx creatorid: %08x",
(uintmax_t )be64toh(id), ntohl(s->creatorid));
printf("\n");
}
}
int
unmask(struct pf_addr *m, sa_family_t af)
{
int i = 31, j = 0, b = 0;
u_int32_t tmp;
while (j < 4 && m->addr32[j] == 0xffffffff) {
b += 32;
j++;
}
if (j < 4) {
tmp = ntohl(m->addr32[j]);
for (i = 31; tmp & (1 << i); --i)
b++;
}
return (b);
}
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