76039bc84f
to this event, adding if_var.h to files that do need it. Also, include all includes that now are included due to implicit pollution via if_var.h Sponsored by: Netflix Sponsored by: Nginx, Inc.
673 lines
19 KiB
C
673 lines
19 KiB
C
/*-
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* Copyright (c) 2001 Daniel Hartmeier
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* Copyright (c) 2002 - 2008 Henning Brauer
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Effort sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F30602-01-2-0537.
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*
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* $OpenBSD: pf_lb.c,v 1.2 2009/02/12 02:13:15 sthen Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_pf.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/rwlock.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/vnet.h>
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#include <net/pfvar.h>
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#include <net/if_pflog.h>
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#include <net/pf_mtag.h>
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#define DPFPRINTF(n, x) if (V_pf_status.debug >= (n)) printf x
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static void pf_hash(struct pf_addr *, struct pf_addr *,
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struct pf_poolhashkey *, sa_family_t);
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static struct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *,
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int, int, struct pfi_kif *,
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struct pf_addr *, u_int16_t, struct pf_addr *,
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uint16_t, int, struct pf_anchor_stackframe *);
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static int pf_get_sport(sa_family_t, uint8_t, struct pf_rule *,
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struct pf_addr *, uint16_t, struct pf_addr *, uint16_t, struct pf_addr *,
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uint16_t *, uint16_t, uint16_t, struct pf_src_node **);
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#define mix(a,b,c) \
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do { \
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a -= b; a -= c; a ^= (c >> 13); \
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b -= c; b -= a; b ^= (a << 8); \
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c -= a; c -= b; c ^= (b >> 13); \
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a -= b; a -= c; a ^= (c >> 12); \
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b -= c; b -= a; b ^= (a << 16); \
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c -= a; c -= b; c ^= (b >> 5); \
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a -= b; a -= c; a ^= (c >> 3); \
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b -= c; b -= a; b ^= (a << 10); \
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c -= a; c -= b; c ^= (b >> 15); \
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} while (0)
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/*
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* hash function based on bridge_hash in if_bridge.c
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*/
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static void
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pf_hash(struct pf_addr *inaddr, struct pf_addr *hash,
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struct pf_poolhashkey *key, sa_family_t af)
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{
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u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0];
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switch (af) {
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#ifdef INET
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case AF_INET:
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a += inaddr->addr32[0];
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b += key->key32[1];
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mix(a, b, c);
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hash->addr32[0] = c + key->key32[2];
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break;
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#endif /* INET */
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#ifdef INET6
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case AF_INET6:
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a += inaddr->addr32[0];
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b += inaddr->addr32[2];
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mix(a, b, c);
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hash->addr32[0] = c;
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a += inaddr->addr32[1];
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b += inaddr->addr32[3];
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c += key->key32[1];
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mix(a, b, c);
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hash->addr32[1] = c;
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a += inaddr->addr32[2];
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b += inaddr->addr32[1];
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c += key->key32[2];
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mix(a, b, c);
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hash->addr32[2] = c;
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a += inaddr->addr32[3];
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b += inaddr->addr32[0];
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c += key->key32[3];
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mix(a, b, c);
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hash->addr32[3] = c;
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break;
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#endif /* INET6 */
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}
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}
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static struct pf_rule *
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pf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off,
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int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport,
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struct pf_addr *daddr, uint16_t dport, int rs_num,
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struct pf_anchor_stackframe *anchor_stack)
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{
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struct pf_rule *r, *rm = NULL;
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struct pf_ruleset *ruleset = NULL;
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int tag = -1;
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int rtableid = -1;
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int asd = 0;
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r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr);
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while (r && rm == NULL) {
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struct pf_rule_addr *src = NULL, *dst = NULL;
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struct pf_addr_wrap *xdst = NULL;
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if (r->action == PF_BINAT && direction == PF_IN) {
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src = &r->dst;
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if (r->rpool.cur != NULL)
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xdst = &r->rpool.cur->addr;
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} else {
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src = &r->src;
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dst = &r->dst;
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}
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r->evaluations++;
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if (pfi_kif_match(r->kif, kif) == r->ifnot)
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r = r->skip[PF_SKIP_IFP].ptr;
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else if (r->direction && r->direction != direction)
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r = r->skip[PF_SKIP_DIR].ptr;
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else if (r->af && r->af != pd->af)
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r = r->skip[PF_SKIP_AF].ptr;
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else if (r->proto && r->proto != pd->proto)
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r = r->skip[PF_SKIP_PROTO].ptr;
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else if (PF_MISMATCHAW(&src->addr, saddr, pd->af,
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src->neg, kif, M_GETFIB(m)))
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r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR :
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PF_SKIP_DST_ADDR].ptr;
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else if (src->port_op && !pf_match_port(src->port_op,
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src->port[0], src->port[1], sport))
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r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT :
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PF_SKIP_DST_PORT].ptr;
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else if (dst != NULL &&
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PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->neg, NULL,
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M_GETFIB(m)))
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r = r->skip[PF_SKIP_DST_ADDR].ptr;
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else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af,
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0, NULL, M_GETFIB(m)))
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r = TAILQ_NEXT(r, entries);
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else if (dst != NULL && dst->port_op &&
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!pf_match_port(dst->port_op, dst->port[0],
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dst->port[1], dport))
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r = r->skip[PF_SKIP_DST_PORT].ptr;
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else if (r->match_tag && !pf_match_tag(m, r, &tag,
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pd->pf_mtag ? pd->pf_mtag->tag : 0))
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r = TAILQ_NEXT(r, entries);
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else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto !=
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IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m,
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off, pd->hdr.tcp), r->os_fingerprint)))
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r = TAILQ_NEXT(r, entries);
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else {
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if (r->tag)
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tag = r->tag;
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if (r->rtableid >= 0)
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rtableid = r->rtableid;
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if (r->anchor == NULL) {
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rm = r;
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} else
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pf_step_into_anchor(anchor_stack, &asd,
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&ruleset, rs_num, &r, NULL, NULL);
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}
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if (r == NULL)
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pf_step_out_of_anchor(anchor_stack, &asd, &ruleset,
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rs_num, &r, NULL, NULL);
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}
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if (tag > 0 && pf_tag_packet(m, pd, tag))
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return (NULL);
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if (rtableid >= 0)
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M_SETFIB(m, rtableid);
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if (rm != NULL && (rm->action == PF_NONAT ||
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rm->action == PF_NORDR || rm->action == PF_NOBINAT))
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return (NULL);
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return (rm);
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}
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static int
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pf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r,
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struct pf_addr *saddr, uint16_t sport, struct pf_addr *daddr,
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uint16_t dport, struct pf_addr *naddr, uint16_t *nport, uint16_t low,
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uint16_t high, struct pf_src_node **sn)
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{
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struct pf_state_key_cmp key;
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struct pf_addr init_addr;
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uint16_t cut;
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bzero(&init_addr, sizeof(init_addr));
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if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn))
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return (1);
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if (proto == IPPROTO_ICMP) {
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low = 1;
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high = 65535;
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}
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bzero(&key, sizeof(key));
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key.af = af;
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key.proto = proto;
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key.port[0] = dport;
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PF_ACPY(&key.addr[0], daddr, key.af);
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do {
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PF_ACPY(&key.addr[1], naddr, key.af);
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/*
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* port search; start random, step;
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* similar 2 portloop in in_pcbbind
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*/
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if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP ||
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proto == IPPROTO_ICMP) || (low == 0 && high == 0)) {
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/*
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* XXX bug: icmp states don't use the id on both sides.
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* (traceroute -I through nat)
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*/
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key.port[1] = sport;
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if (pf_find_state_all(&key, PF_IN, NULL) == NULL) {
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*nport = sport;
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return (0);
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}
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} else if (low == high) {
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key.port[1] = htons(low);
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if (pf_find_state_all(&key, PF_IN, NULL) == NULL) {
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*nport = htons(low);
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return (0);
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}
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} else {
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uint16_t tmp;
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if (low > high) {
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tmp = low;
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low = high;
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high = tmp;
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}
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/* low < high */
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cut = htonl(arc4random()) % (1 + high - low) + low;
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/* low <= cut <= high */
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for (tmp = cut; tmp <= high; ++(tmp)) {
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key.port[1] = htons(tmp);
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if (pf_find_state_all(&key, PF_IN, NULL) ==
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NULL) {
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*nport = htons(tmp);
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return (0);
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}
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}
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for (tmp = cut - 1; tmp >= low; --(tmp)) {
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key.port[1] = htons(tmp);
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if (pf_find_state_all(&key, PF_IN, NULL) ==
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NULL) {
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*nport = htons(tmp);
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return (0);
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}
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}
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}
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switch (r->rpool.opts & PF_POOL_TYPEMASK) {
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case PF_POOL_RANDOM:
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case PF_POOL_ROUNDROBIN:
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if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn))
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return (1);
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break;
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case PF_POOL_NONE:
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case PF_POOL_SRCHASH:
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case PF_POOL_BITMASK:
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default:
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return (1);
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}
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} while (! PF_AEQ(&init_addr, naddr, af) );
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return (1); /* none available */
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}
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int
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pf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr,
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struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn)
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{
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struct pf_pool *rpool = &r->rpool;
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struct pf_addr *raddr = NULL, *rmask = NULL;
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if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR &&
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(r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) {
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*sn = pf_find_src_node(saddr, r, af, 0);
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if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) {
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PF_ACPY(naddr, &(*sn)->raddr, af);
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if (V_pf_status.debug >= PF_DEBUG_MISC) {
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printf("pf_map_addr: src tracking maps ");
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pf_print_host(saddr, 0, af);
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printf(" to ");
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pf_print_host(naddr, 0, af);
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printf("\n");
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}
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return (0);
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}
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}
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if (rpool->cur->addr.type == PF_ADDR_NOROUTE)
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return (1);
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if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
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switch (af) {
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#ifdef INET
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case AF_INET:
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if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 &&
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(rpool->opts & PF_POOL_TYPEMASK) !=
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PF_POOL_ROUNDROBIN)
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return (1);
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raddr = &rpool->cur->addr.p.dyn->pfid_addr4;
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rmask = &rpool->cur->addr.p.dyn->pfid_mask4;
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break;
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#endif /* INET */
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#ifdef INET6
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case AF_INET6:
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if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 &&
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(rpool->opts & PF_POOL_TYPEMASK) !=
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PF_POOL_ROUNDROBIN)
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return (1);
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raddr = &rpool->cur->addr.p.dyn->pfid_addr6;
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rmask = &rpool->cur->addr.p.dyn->pfid_mask6;
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break;
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#endif /* INET6 */
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}
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} else if (rpool->cur->addr.type == PF_ADDR_TABLE) {
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if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN)
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return (1); /* unsupported */
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} else {
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raddr = &rpool->cur->addr.v.a.addr;
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rmask = &rpool->cur->addr.v.a.mask;
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}
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switch (rpool->opts & PF_POOL_TYPEMASK) {
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case PF_POOL_NONE:
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PF_ACPY(naddr, raddr, af);
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break;
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case PF_POOL_BITMASK:
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PF_POOLMASK(naddr, raddr, rmask, saddr, af);
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break;
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case PF_POOL_RANDOM:
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if (init_addr != NULL && PF_AZERO(init_addr, af)) {
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switch (af) {
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#ifdef INET
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case AF_INET:
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rpool->counter.addr32[0] = htonl(arc4random());
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break;
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#endif /* INET */
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#ifdef INET6
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case AF_INET6:
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if (rmask->addr32[3] != 0xffffffff)
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rpool->counter.addr32[3] =
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htonl(arc4random());
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else
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break;
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if (rmask->addr32[2] != 0xffffffff)
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rpool->counter.addr32[2] =
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htonl(arc4random());
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else
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break;
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if (rmask->addr32[1] != 0xffffffff)
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rpool->counter.addr32[1] =
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htonl(arc4random());
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else
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break;
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if (rmask->addr32[0] != 0xffffffff)
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rpool->counter.addr32[0] =
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htonl(arc4random());
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break;
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#endif /* INET6 */
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}
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PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af);
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PF_ACPY(init_addr, naddr, af);
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} else {
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PF_AINC(&rpool->counter, af);
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PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af);
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}
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break;
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case PF_POOL_SRCHASH:
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{
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unsigned char hash[16];
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pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af);
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PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af);
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break;
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}
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case PF_POOL_ROUNDROBIN:
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{
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struct pf_pooladdr *acur = rpool->cur;
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/*
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* XXXGL: in the round-robin case we need to store
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* the round-robin machine state in the rule, thus
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* forwarding thread needs to modify rule.
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*
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* This is done w/o locking, because performance is assumed
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* more important than round-robin precision.
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*
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* In the simpliest case we just update the "rpool->cur"
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* pointer. However, if pool contains tables or dynamic
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* addresses, then "tblidx" is also used to store machine
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* state. Since "tblidx" is int, concurrent access to it can't
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* lead to inconsistence, only to lost of precision.
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*
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* Things get worse, if table contains not hosts, but
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* prefixes. In this case counter also stores machine state,
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* and for IPv6 address, counter can't be updated atomically.
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* Probably, using round-robin on a table containing IPv6
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* prefixes (or even IPv4) would cause a panic.
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*/
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if (rpool->cur->addr.type == PF_ADDR_TABLE) {
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if (!pfr_pool_get(rpool->cur->addr.p.tbl,
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&rpool->tblidx, &rpool->counter, af))
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goto get_addr;
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} else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
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if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt,
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&rpool->tblidx, &rpool->counter, af))
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goto get_addr;
|
|
} else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af))
|
|
goto get_addr;
|
|
|
|
try_next:
|
|
if (TAILQ_NEXT(rpool->cur, entries) == NULL)
|
|
rpool->cur = TAILQ_FIRST(&rpool->list);
|
|
else
|
|
rpool->cur = TAILQ_NEXT(rpool->cur, entries);
|
|
if (rpool->cur->addr.type == PF_ADDR_TABLE) {
|
|
rpool->tblidx = -1;
|
|
if (pfr_pool_get(rpool->cur->addr.p.tbl,
|
|
&rpool->tblidx, &rpool->counter, af)) {
|
|
/* table contains no address of type 'af' */
|
|
if (rpool->cur != acur)
|
|
goto try_next;
|
|
return (1);
|
|
}
|
|
} else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
|
|
rpool->tblidx = -1;
|
|
if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt,
|
|
&rpool->tblidx, &rpool->counter, af)) {
|
|
/* table contains no address of type 'af' */
|
|
if (rpool->cur != acur)
|
|
goto try_next;
|
|
return (1);
|
|
}
|
|
} else {
|
|
raddr = &rpool->cur->addr.v.a.addr;
|
|
rmask = &rpool->cur->addr.v.a.mask;
|
|
PF_ACPY(&rpool->counter, raddr, af);
|
|
}
|
|
|
|
get_addr:
|
|
PF_ACPY(naddr, &rpool->counter, af);
|
|
if (init_addr != NULL && PF_AZERO(init_addr, af))
|
|
PF_ACPY(init_addr, naddr, af);
|
|
PF_AINC(&rpool->counter, af);
|
|
break;
|
|
}
|
|
}
|
|
if (*sn != NULL)
|
|
PF_ACPY(&(*sn)->raddr, naddr, af);
|
|
|
|
if (V_pf_status.debug >= PF_DEBUG_MISC &&
|
|
(rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) {
|
|
printf("pf_map_addr: selected address ");
|
|
pf_print_host(naddr, 0, af);
|
|
printf("\n");
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct pf_rule *
|
|
pf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction,
|
|
struct pfi_kif *kif, struct pf_src_node **sn,
|
|
struct pf_state_key **skp, struct pf_state_key **nkp,
|
|
struct pf_addr *saddr, struct pf_addr *daddr,
|
|
uint16_t sport, uint16_t dport, struct pf_anchor_stackframe *anchor_stack)
|
|
{
|
|
struct pf_rule *r = NULL;
|
|
struct pf_addr *naddr;
|
|
uint16_t *nport;
|
|
|
|
PF_RULES_RASSERT();
|
|
KASSERT(*skp == NULL, ("*skp not NULL"));
|
|
KASSERT(*nkp == NULL, ("*nkp not NULL"));
|
|
|
|
if (direction == PF_OUT) {
|
|
r = pf_match_translation(pd, m, off, direction, kif, saddr,
|
|
sport, daddr, dport, PF_RULESET_BINAT, anchor_stack);
|
|
if (r == NULL)
|
|
r = pf_match_translation(pd, m, off, direction, kif,
|
|
saddr, sport, daddr, dport, PF_RULESET_NAT,
|
|
anchor_stack);
|
|
} else {
|
|
r = pf_match_translation(pd, m, off, direction, kif, saddr,
|
|
sport, daddr, dport, PF_RULESET_RDR, anchor_stack);
|
|
if (r == NULL)
|
|
r = pf_match_translation(pd, m, off, direction, kif,
|
|
saddr, sport, daddr, dport, PF_RULESET_BINAT,
|
|
anchor_stack);
|
|
}
|
|
|
|
if (r == NULL)
|
|
return (NULL);
|
|
|
|
switch (r->action) {
|
|
case PF_NONAT:
|
|
case PF_NOBINAT:
|
|
case PF_NORDR:
|
|
return (NULL);
|
|
}
|
|
|
|
*skp = pf_state_key_setup(pd, saddr, daddr, sport, dport);
|
|
if (*skp == NULL)
|
|
return (NULL);
|
|
*nkp = pf_state_key_clone(*skp);
|
|
if (*nkp == NULL) {
|
|
uma_zfree(V_pf_state_key_z, skp);
|
|
*skp = NULL;
|
|
return (NULL);
|
|
}
|
|
|
|
/* XXX We only modify one side for now. */
|
|
naddr = &(*nkp)->addr[1];
|
|
nport = &(*nkp)->port[1];
|
|
|
|
switch (r->action) {
|
|
case PF_NAT:
|
|
if (pf_get_sport(pd->af, pd->proto, r, saddr, sport, daddr,
|
|
dport, naddr, nport, r->rpool.proxy_port[0],
|
|
r->rpool.proxy_port[1], sn)) {
|
|
DPFPRINTF(PF_DEBUG_MISC,
|
|
("pf: NAT proxy port allocation (%u-%u) failed\n",
|
|
r->rpool.proxy_port[0], r->rpool.proxy_port[1]));
|
|
goto notrans;
|
|
}
|
|
break;
|
|
case PF_BINAT:
|
|
switch (direction) {
|
|
case PF_OUT:
|
|
if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){
|
|
switch (pd->af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (r->rpool.cur->addr.p.dyn->
|
|
pfid_acnt4 < 1)
|
|
goto notrans;
|
|
PF_POOLMASK(naddr,
|
|
&r->rpool.cur->addr.p.dyn->
|
|
pfid_addr4,
|
|
&r->rpool.cur->addr.p.dyn->
|
|
pfid_mask4, saddr, AF_INET);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (r->rpool.cur->addr.p.dyn->
|
|
pfid_acnt6 < 1)
|
|
goto notrans;
|
|
PF_POOLMASK(naddr,
|
|
&r->rpool.cur->addr.p.dyn->
|
|
pfid_addr6,
|
|
&r->rpool.cur->addr.p.dyn->
|
|
pfid_mask6, saddr, AF_INET6);
|
|
break;
|
|
#endif /* INET6 */
|
|
}
|
|
} else
|
|
PF_POOLMASK(naddr,
|
|
&r->rpool.cur->addr.v.a.addr,
|
|
&r->rpool.cur->addr.v.a.mask, saddr,
|
|
pd->af);
|
|
break;
|
|
case PF_IN:
|
|
if (r->src.addr.type == PF_ADDR_DYNIFTL) {
|
|
switch (pd->af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (r->src.addr.p.dyn-> pfid_acnt4 < 1)
|
|
goto notrans;
|
|
PF_POOLMASK(naddr,
|
|
&r->src.addr.p.dyn->pfid_addr4,
|
|
&r->src.addr.p.dyn->pfid_mask4,
|
|
daddr, AF_INET);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (r->src.addr.p.dyn->pfid_acnt6 < 1)
|
|
goto notrans;
|
|
PF_POOLMASK(naddr,
|
|
&r->src.addr.p.dyn->pfid_addr6,
|
|
&r->src.addr.p.dyn->pfid_mask6,
|
|
daddr, AF_INET6);
|
|
break;
|
|
#endif /* INET6 */
|
|
}
|
|
} else
|
|
PF_POOLMASK(naddr, &r->src.addr.v.a.addr,
|
|
&r->src.addr.v.a.mask, daddr, pd->af);
|
|
break;
|
|
}
|
|
break;
|
|
case PF_RDR: {
|
|
if (pf_map_addr(pd->af, r, saddr, naddr, NULL, sn))
|
|
goto notrans;
|
|
if ((r->rpool.opts & PF_POOL_TYPEMASK) == PF_POOL_BITMASK)
|
|
PF_POOLMASK(naddr, naddr, &r->rpool.cur->addr.v.a.mask,
|
|
daddr, pd->af);
|
|
|
|
if (r->rpool.proxy_port[1]) {
|
|
uint32_t tmp_nport;
|
|
|
|
tmp_nport = ((ntohs(dport) - ntohs(r->dst.port[0])) %
|
|
(r->rpool.proxy_port[1] - r->rpool.proxy_port[0] +
|
|
1)) + r->rpool.proxy_port[0];
|
|
|
|
/* Wrap around if necessary. */
|
|
if (tmp_nport > 65535)
|
|
tmp_nport -= 65535;
|
|
*nport = htons((uint16_t)tmp_nport);
|
|
} else if (r->rpool.proxy_port[0])
|
|
*nport = htons(r->rpool.proxy_port[0]);
|
|
break;
|
|
}
|
|
default:
|
|
panic("%s: unknown action %u", __func__, r->action);
|
|
}
|
|
|
|
/* Return success only if translation really happened. */
|
|
if (bcmp(*skp, *nkp, sizeof(struct pf_state_key_cmp)))
|
|
return (r);
|
|
|
|
notrans:
|
|
uma_zfree(V_pf_state_key_z, *nkp);
|
|
uma_zfree(V_pf_state_key_z, *skp);
|
|
*skp = *nkp = NULL;
|
|
|
|
return (NULL);
|
|
}
|