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/* $OpenBSD: pf_print_state.c,v 1.2 2002/06/11 02:48:12 frantzen 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/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp6.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <net/pfvar.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <netdb.h>
#include <stdarg.h>
#include <errno.h>
#include <err.h>
#include "pfctl_parser.h"
#include "pf_print_state.h"
int
unmask(struct pf_addr *m, u_int8_t af)
{
int i = 31, j = 0, b = 0, msize;
u_int32_t tmp;
if (af == AF_INET)
msize = 1;
else
msize = 4;
while (j < msize && m->addr32[j] == 0xffffffff) {
b += 32;
j++;
}
if (j < msize) {
tmp = ntohl(m->addr32[j]);
for (i = 31; tmp & (1 << i); --i)
b++;
}
return (b);
}
void
print_addr(struct pf_addr_wrap *addr, struct pf_addr *mask, u_int8_t af)
{
char buf[48];
if (addr->addr_dyn != NULL)
printf("(%s)", addr->addr.pfa.ifname);
else {
if (inet_ntop(af, &addr->addr, buf, sizeof(buf)) == NULL)
printf("?");
else
printf("%s", buf);
}
if (mask != NULL) {
int bits = unmask(mask, af);
if (bits != (af == AF_INET ? 32 : 128))
printf("/%u", bits);
}
}
void
print_name(struct pf_addr *addr, struct pf_addr *mask, int af)
{
char buf[48];
struct hostent *hp;
if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL)
printf("?");
else {
hp = getpfhostname(buf);
printf("%s", hp->h_name);
}
if (mask != NULL) {
if (!PF_AZERO(mask, af))
printf("/%u", unmask(mask, af));
}
}
void
print_host(struct pf_state_host *h, u_int8_t af, int opts)
{
u_int16_t p = ntohs(h->port);
if (opts & PF_OPT_USEDNS)
print_name(&h->addr, NULL, af);
else {
struct pf_addr_wrap aw;
aw.addr = h->addr;
aw.addr_dyn = NULL;
print_addr(&aw, NULL, af);
}
if (p) {
if (af == AF_INET)
printf(":%u", p);
else
printf("[%u]", p);
}
}
void
print_seq(struct pf_state_peer *p)
{
if (p->seqdiff)
printf("[%u + %u](+%u)", p->seqlo, p->seqhi - p->seqlo,
p->seqdiff);
else
printf("[%u + %u]", p->seqlo, p->seqhi - p->seqlo);
}
void
print_state(struct pf_state *s, int opts)
{
struct pf_state_peer *src, *dst;
struct protoent *p;
u_int8_t hrs, min, sec;
if (s->direction == PF_OUT) {
src = &s->src;
dst = &s->dst;
} else {
src = &s->dst;
dst = &s->src;
}
if ((p = getprotobynumber(s->proto)) != NULL)
printf("%s ", p->p_name);
else
printf("%u ", s->proto);
if (PF_ANEQ(&s->lan.addr, &s->gwy.addr, s->af) ||
(s->lan.port != s->gwy.port)) {
print_host(&s->lan, s->af, opts);
if (s->direction == PF_OUT)
printf(" -> ");
else
printf(" <- ");
}
print_host(&s->gwy, s->af, opts);
if (s->direction == PF_OUT)
printf(" -> ");
else
printf(" <- ");
print_host(&s->ext, s->af, opts);
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 {
printf(" <BAD STATE LEVELS>\n");
}
if (opts & PF_OPT_VERBOSE) {
printf(" ");
print_seq(src);
printf(" ");
print_seq(dst);
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]);
} else if (s->proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES &&
dst->state < PFOTHERS_NSTATES) {
/* 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) {
sec = s->creation % 60;
s->creation /= 60;
min = s->creation % 60;
s->creation /= 60;
hrs = s->creation;
printf(" age %.2u:%.2u:%.2u", hrs, min, sec);
sec = s->expire % 60;
s->expire /= 60;
min = s->expire % 60;
s->expire /= 60;
hrs = s->expire;
printf(", expires in %.2u:%.2u:%.2u", hrs, min, sec);
printf(", %u pkts, %u bytes", s->packets, s->bytes);
if (s->rule.nr != USHRT_MAX)
printf(", rule %u", s->rule.nr);
printf("\n");
}
}
struct hostent *
getpfhostname(const char *addr_str)
{
in_addr_t addr_num;
struct hostent *hp;
static struct hostent myhp;
addr_num = inet_addr(addr_str);
if (addr_num == INADDR_NONE) {
myhp.h_name = (char *)addr_str;
hp = &myhp;
return (hp);
}
hp = gethostbyaddr((char *)&addr_num, sizeof(addr_num), AF_INET);
if (hp == NULL) {
myhp.h_name = (char *)addr_str;
hp = &myhp;
}
return (hp);
}
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