c3ead4d7df
1) Ruleset parser uses a global variable for anchor stack.
2) When processing a wildcard anchor, matching anchors are marked.
To fix the first one:
o Allocate anchor processing stack on stack. To make this allocation
as small as possible, following measures taken:
- Maximum stack size reduced from 64 to 32.
- The struct pf_anchor_stackframe trimmed by one pointer - parent.
We can always obtain the parent via the rule pointer.
- When pf_test_rule() calls pf_get_translation(), the former lends
its stack to the latter, to avoid recursive allocation 32 entries.
The second one appeared more tricky. The code, that marks anchors was
added in OpenBSD rev. 1.516 of pf.c. According to commit log, the idea
is to enable the "quick" keyword on an anchor rule. The feature isn't
documented anywhere. The most obscure part of the 1.516 was that code
examines the "match" mark on a just processed child, which couldn't be
put here by current frame. Since this wasn't documented even in the
commit message and functionality of this is not clear to me, I decided
to drop this examination for now. The rest of 1.516 is redone in a
thread safe manner - the mark isn't put on the anchor itself, but on
current stack frame. To avoid growing stack frame, we utilize LSB
from the rule pointer, relying on kernel malloc(9) returning pointer
aligned addresses.
Discussed with: dhartmei
667 lines
18 KiB
C
667 lines
18 KiB
C
/* $OpenBSD: pf_lb.c,v 1.2 2009/02/12 02:13:15 sthen Exp $ */
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/*
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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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*/
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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/socket.h>
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#include <sys/sysctl.h>
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#include <net/if.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, u_int8_t, struct pf_rule *,
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struct pf_addr *, struct pf_addr *, u_int16_t,
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struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t,
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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, struct pf_addr *daddr, u_int16_t dport,
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struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high,
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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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u_int16_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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do {
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key.af = af;
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key.proto = proto;
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PF_ACPY(&key.addr[1], daddr, key.af);
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PF_ACPY(&key.addr[0], naddr, key.af);
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key.port[1] = dport;
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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)) {
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key.port[0] = dport;
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if (pf_find_state_all(&key, PF_IN, NULL) == NULL)
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return (0);
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} else if (low == 0 && high == 0) {
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key.port[0] = *nport;
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if (pf_find_state_all(&key, PF_IN, NULL) == NULL)
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return (0);
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} else if (low == high) {
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key.port[0] = 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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u_int16_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[0] = 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[0] = 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.
|
|
*/
|
|
|
|
if (rpool->cur->addr.type == PF_ADDR_TABLE) {
|
|
if (!pfr_pool_get(rpool->cur->addr.p.tbl,
|
|
&rpool->tblidx, &rpool->counter, af))
|
|
goto get_addr;
|
|
} else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
|
|
if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt,
|
|
&rpool->tblidx, &rpool->counter, af))
|
|
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, 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);
|
|
}
|