/*      $NetBSD: pf_print_state.c,v 1.4 2008/06/18 09:06:26 yamt Exp $  */
/*      $OpenBSD: pf_print_state.c,v 1.45 2007/05/31 04:13:37 mcbride 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>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <net/pfvar.h>
#include <arpa/inet.h>
#include <netdb.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_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;
        case PF_ADDR_RTLABEL:
                printf("route \"%s\"", addr->v.rtlabelname);
                return;
        default:
                printf("?");
                return;
        }

        /* mask if not _both_ address and mask are zero */
        if (!(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 pfsync_state_host *h, sa_family_t af, int opts)
{
        u_int16_t p = ntohs(h->port);

        if (opts & PF_OPT_USEDNS)
                print_name(&h->addr, af);
        else {
                struct pf_addr_wrap aw;

                memset(&aw, 0, sizeof(aw));
                aw.v.a.addr = h->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 (p) {
                if (af == AF_INET)
                        printf(":%u", p);
                else
                        printf("[%u]", p);
        }
}

void
print_seq(struct pfsync_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 pfsync_state *s, int opts)
{
        struct pfsync_state_peer *src, *dst;
        struct protoent *p;
        int min, sec;

        if (s->direction == PF_OUT) {
                src = &s->src;
                dst = &s->dst;
        } else {
                src = &s->dst;
                dst = &s->src;
        }
        printf("%s ", s->ifname);
        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 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]);
        } 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;
                printf("   age %.2u:%.2u:%.2u", s->creation, min, sec);
                sec = s->expire % 60;
                s->expire /= 60;
                min = s->expire % 60;
                s->expire /= 60;
                printf(", expires in %.2u:%.2u:%.2u", s->expire, min, sec);
                printf(", %llu:%llu pkts, %llu:%llu bytes",
                    (unsigned long long int)pf_state_counter_from_pfsync(s->packets[0]),
                    (unsigned long long int)pf_state_counter_from_pfsync(s->packets[1]),
                    (unsigned long long int)pf_state_counter_from_pfsync(s->bytes[0]),
                    (unsigned long long int)pf_state_counter_from_pfsync(s->bytes[1]));
                if (s->anchor != -1)
                        printf(", anchor %u", s->anchor);
                if (s->rule != -1)
                        printf(", rule %u", s->rule);
                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) {
                printf("   id: %016llx creatorid: %08x%s\n",
                    (unsigned long long int)pf_state_counter_from_pfsync(s->id),
                    ntohl(s->creatorid),
                    ((s->sync_flags & PFSTATE_NOSYNC) ? " (no-sync)" : ""));
        }
}

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);
}