2aa21096c7
MAP-E (RFC 7597) requires special care for selecting source ports in NAT operation on the Customer Edge because a part of bits of the port numbers are used by the Border Relay to distinguish another side of the IPv4-over-IPv6 tunnel. PR: 254577 Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D29468
561 lines
17 KiB
C
561 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
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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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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <sys/ioctl.h>
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#include <sys/nv.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <net/if.h>
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#include <net/pfvar.h>
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#include <netinet/in.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libpfctl.h"
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static void
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pf_nvuint_8_array(const nvlist_t *nvl, const char *name, size_t maxelems,
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u_int8_t *numbers, size_t *nelems)
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{
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const uint64_t *tmp;
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size_t elems;
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tmp = nvlist_get_number_array(nvl, name, &elems);
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assert(elems <= maxelems);
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for (size_t i = 0; i < elems; i++)
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numbers[i] = tmp[i];
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if (nelems)
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*nelems = elems;
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}
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static void
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pf_nvuint_16_array(const nvlist_t *nvl, const char *name, size_t maxelems,
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u_int16_t *numbers, size_t *nelems)
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{
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const uint64_t *tmp;
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size_t elems;
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tmp = nvlist_get_number_array(nvl, name, &elems);
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assert(elems <= maxelems);
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for (size_t i = 0; i < elems; i++)
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numbers[i] = tmp[i];
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if (nelems)
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*nelems = elems;
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}
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static void
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pf_nvuint_32_array(const nvlist_t *nvl, const char *name, size_t maxelems,
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u_int32_t *numbers, size_t *nelems)
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{
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const uint64_t *tmp;
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size_t elems;
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tmp = nvlist_get_number_array(nvl, name, &elems);
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assert(elems <= maxelems);
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for (size_t i = 0; i < elems; i++)
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numbers[i] = tmp[i];
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if (nelems)
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*nelems = elems;
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}
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static void
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pf_nvuint_64_array(const nvlist_t *nvl, const char *name, size_t maxelems,
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u_int64_t *numbers, size_t *nelems)
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{
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const uint64_t *tmp;
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size_t elems;
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tmp = nvlist_get_number_array(nvl, name, &elems);
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assert(elems <= maxelems);
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for (size_t i = 0; i < elems; i++)
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numbers[i] = tmp[i];
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if (nelems)
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*nelems = elems;
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}
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static void
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pfctl_nv_add_addr(nvlist_t *nvparent, const char *name,
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const struct pf_addr *addr)
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{
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nvlist_t *nvl = nvlist_create(0);
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nvlist_add_binary(nvl, "addr", addr, sizeof(*addr));
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvaddr_to_addr(const nvlist_t *nvl, struct pf_addr *addr)
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{
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size_t len;
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const void *data;
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data = nvlist_get_binary(nvl, "addr", &len);
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assert(len == sizeof(struct pf_addr));
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memcpy(addr, data, len);
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}
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static void
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pfctl_nv_add_addr_wrap(nvlist_t *nvparent, const char *name,
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const struct pf_addr_wrap *addr)
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{
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nvlist_t *nvl = nvlist_create(0);
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nvlist_add_number(nvl, "type", addr->type);
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nvlist_add_number(nvl, "iflags", addr->iflags);
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nvlist_add_string(nvl, "ifname", addr->v.ifname);
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nvlist_add_string(nvl, "tblname", addr->v.tblname);
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pfctl_nv_add_addr(nvl, "addr", &addr->v.a.addr);
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pfctl_nv_add_addr(nvl, "mask", &addr->v.a.mask);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvaddr_wrap_to_addr_wrap(const nvlist_t *nvl, struct pf_addr_wrap *addr)
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{
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addr->type = nvlist_get_number(nvl, "type");
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addr->iflags = nvlist_get_number(nvl, "iflags");
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strlcpy(addr->v.ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ);
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strlcpy(addr->v.tblname, nvlist_get_string(nvl, "tblname"),
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PF_TABLE_NAME_SIZE);
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pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &addr->v.a.addr);
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pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "mask"), &addr->v.a.mask);
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}
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static void
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pfctl_nv_add_rule_addr(nvlist_t *nvparent, const char *name,
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const struct pf_rule_addr *addr)
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{
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u_int64_t ports[2];
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nvlist_t *nvl = nvlist_create(0);
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pfctl_nv_add_addr_wrap(nvl, "addr", &addr->addr);
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ports[0] = addr->port[0];
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ports[1] = addr->port[1];
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nvlist_add_number_array(nvl, "port", ports, 2);
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nvlist_add_number(nvl, "neg", addr->neg);
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nvlist_add_number(nvl, "port_op", addr->port_op);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvrule_addr_to_rule_addr(const nvlist_t *nvl, struct pf_rule_addr *addr)
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{
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pf_nvaddr_wrap_to_addr_wrap(nvlist_get_nvlist(nvl, "addr"), &addr->addr);
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pf_nvuint_16_array(nvl, "port", 2, addr->port, NULL);
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addr->neg = nvlist_get_number(nvl, "neg");
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addr->port_op = nvlist_get_number(nvl, "port_op");
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}
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static void
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pfctl_nv_add_mape(nvlist_t *nvparent, const char *name,
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const struct pf_mape_portset *mape)
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{
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nvlist_t *nvl = nvlist_create(0);
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nvlist_add_number(nvl, "offset", mape->offset);
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nvlist_add_number(nvl, "psidlen", mape->psidlen);
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nvlist_add_number(nvl, "psid", mape->psid);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pfctl_nv_add_pool(nvlist_t *nvparent, const char *name,
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const struct pfctl_pool *pool)
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{
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u_int64_t ports[2];
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nvlist_t *nvl = nvlist_create(0);
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nvlist_add_binary(nvl, "key", &pool->key, sizeof(pool->key));
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pfctl_nv_add_addr(nvl, "counter", &pool->counter);
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nvlist_add_number(nvl, "tblidx", pool->tblidx);
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ports[0] = pool->proxy_port[0];
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ports[1] = pool->proxy_port[1];
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nvlist_add_number_array(nvl, "proxy_port", ports, 2);
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nvlist_add_number(nvl, "opts", pool->opts);
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pfctl_nv_add_mape(nvl, "mape", &pool->mape);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvmape_to_mape(const nvlist_t *nvl, struct pf_mape_portset *mape)
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{
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mape->offset = nvlist_get_number(nvl, "offset");
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mape->psidlen = nvlist_get_number(nvl, "psidlen");
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mape->psid = nvlist_get_number(nvl, "psid");
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}
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static void
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pf_nvpool_to_pool(const nvlist_t *nvl, struct pfctl_pool *pool)
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{
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size_t len;
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const void *data;
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data = nvlist_get_binary(nvl, "key", &len);
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assert(len == sizeof(pool->key));
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memcpy(&pool->key, data, len);
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pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "counter"), &pool->counter);
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pool->tblidx = nvlist_get_number(nvl, "tblidx");
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pf_nvuint_16_array(nvl, "proxy_port", 2, pool->proxy_port, NULL);
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pool->opts = nvlist_get_number(nvl, "opts");
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if (nvlist_exists_nvlist(nvl, "mape"))
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pf_nvmape_to_mape(nvlist_get_nvlist(nvl, "mape"), &pool->mape);
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}
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static void
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pfctl_nv_add_uid(nvlist_t *nvparent, const char *name,
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const struct pf_rule_uid *uid)
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{
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u_int64_t uids[2];
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nvlist_t *nvl = nvlist_create(0);
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uids[0] = uid->uid[0];
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uids[1] = uid->uid[1];
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nvlist_add_number_array(nvl, "uid", uids, 2);
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nvlist_add_number(nvl, "op", uid->op);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvrule_uid_to_rule_uid(const nvlist_t *nvl, struct pf_rule_uid *uid)
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{
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pf_nvuint_32_array(nvl, "uid", 2, uid->uid, NULL);
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uid->op = nvlist_get_number(nvl, "op");
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}
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static void
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pfctl_nv_add_divert(nvlist_t *nvparent, const char *name,
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const struct pfctl_rule *r)
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{
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nvlist_t *nvl = nvlist_create(0);
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pfctl_nv_add_addr(nvl, "addr", &r->divert.addr);
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nvlist_add_number(nvl, "port", r->divert.port);
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nvlist_add_nvlist(nvparent, name, nvl);
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}
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static void
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pf_nvdivert_to_divert(const nvlist_t *nvl, struct pfctl_rule *rule)
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{
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pf_nvaddr_to_addr(nvlist_get_nvlist(nvl, "addr"), &rule->divert.addr);
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rule->divert.port = nvlist_get_number(nvl, "port");
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}
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static void
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pf_nvrule_to_rule(const nvlist_t *nvl, struct pfctl_rule *rule)
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{
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const uint64_t *skip;
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size_t skipcount;
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rule->nr = nvlist_get_number(nvl, "nr");
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pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "src"), &rule->src);
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pf_nvrule_addr_to_rule_addr(nvlist_get_nvlist(nvl, "dst"), &rule->dst);
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skip = nvlist_get_number_array(nvl, "skip", &skipcount);
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assert(skip);
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assert(skipcount == PF_SKIP_COUNT);
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for (int i = 0; i < PF_SKIP_COUNT; i++)
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rule->skip[i].nr = skip[i];
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strlcpy(rule->label, nvlist_get_string(nvl, "label"), PF_RULE_LABEL_SIZE);
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strlcpy(rule->ifname, nvlist_get_string(nvl, "ifname"), IFNAMSIZ);
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strlcpy(rule->qname, nvlist_get_string(nvl, "qname"), PF_QNAME_SIZE);
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strlcpy(rule->pqname, nvlist_get_string(nvl, "pqname"), PF_QNAME_SIZE);
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strlcpy(rule->tagname, nvlist_get_string(nvl, "tagname"),
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PF_TAG_NAME_SIZE);
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strlcpy(rule->match_tagname, nvlist_get_string(nvl, "match_tagname"),
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PF_TAG_NAME_SIZE);
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strlcpy(rule->overload_tblname, nvlist_get_string(nvl, "overload_tblname"),
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PF_TABLE_NAME_SIZE);
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pf_nvpool_to_pool(nvlist_get_nvlist(nvl, "rpool"), &rule->rpool);
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rule->evaluations = nvlist_get_number(nvl, "evaluations");
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pf_nvuint_64_array(nvl, "packets", 2, rule->packets, NULL);
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pf_nvuint_64_array(nvl, "bytes", 2, rule->bytes, NULL);
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rule->os_fingerprint = nvlist_get_number(nvl, "os_fingerprint");
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rule->rtableid = nvlist_get_number(nvl, "rtableid");
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pf_nvuint_32_array(nvl, "timeout", PFTM_MAX, rule->timeout, NULL);
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rule->max_states = nvlist_get_number(nvl, "max_states");
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rule->max_src_nodes = nvlist_get_number(nvl, "max_src_nodes");
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rule->max_src_states = nvlist_get_number(nvl, "max_src_states");
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rule->max_src_conn = nvlist_get_number(nvl, "max_src_conn");
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rule->max_src_conn_rate.limit =
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nvlist_get_number(nvl, "max_src_conn_rate.limit");
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rule->max_src_conn_rate.seconds =
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nvlist_get_number(nvl, "max_src_conn_rate.seconds");
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rule->qid = nvlist_get_number(nvl, "qid");
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rule->pqid = nvlist_get_number(nvl, "pqid");
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rule->prob = nvlist_get_number(nvl, "prob");
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rule->cuid = nvlist_get_number(nvl, "cuid");
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rule->cpid = nvlist_get_number(nvl, "cpid");
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rule->return_icmp = nvlist_get_number(nvl, "return_icmp");
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rule->return_icmp6 = nvlist_get_number(nvl, "return_icmp6");
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rule->max_mss = nvlist_get_number(nvl, "max_mss");
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rule->scrub_flags = nvlist_get_number(nvl, "scrub_flags");
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pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "uid"), &rule->uid);
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pf_nvrule_uid_to_rule_uid(nvlist_get_nvlist(nvl, "gid"),
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(struct pf_rule_uid *)&rule->gid);
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rule->rule_flag = nvlist_get_number(nvl, "rule_flag");
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rule->action = nvlist_get_number(nvl, "action");
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rule->direction = nvlist_get_number(nvl, "direction");
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rule->log = nvlist_get_number(nvl, "log");
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rule->logif = nvlist_get_number(nvl, "logif");
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rule->quick = nvlist_get_number(nvl, "quick");
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rule->ifnot = nvlist_get_number(nvl, "ifnot");
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rule->match_tag_not = nvlist_get_number(nvl, "match_tag_not");
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rule->natpass = nvlist_get_number(nvl, "natpass");
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rule->keep_state = nvlist_get_number(nvl, "keep_state");
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rule->af = nvlist_get_number(nvl, "af");
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rule->proto = nvlist_get_number(nvl, "proto");
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rule->type = nvlist_get_number(nvl, "type");
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rule->code = nvlist_get_number(nvl, "code");
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rule->flags = nvlist_get_number(nvl, "flags");
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rule->flagset = nvlist_get_number(nvl, "flagset");
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rule->min_ttl = nvlist_get_number(nvl, "min_ttl");
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rule->allow_opts = nvlist_get_number(nvl, "allow_opts");
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rule->rt = nvlist_get_number(nvl, "rt");
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rule->return_ttl = nvlist_get_number(nvl, "return_ttl");
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rule->tos = nvlist_get_number(nvl, "tos");
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rule->set_tos = nvlist_get_number(nvl, "set_tos");
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rule->anchor_relative = nvlist_get_number(nvl, "anchor_relative");
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rule->anchor_wildcard = nvlist_get_number(nvl, "anchor_wildcard");
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rule->flush = nvlist_get_number(nvl, "flush");
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rule->prio = nvlist_get_number(nvl, "prio");
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pf_nvuint_8_array(nvl, "set_prio", 2, rule->set_prio, NULL);
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pf_nvdivert_to_divert(nvlist_get_nvlist(nvl, "divert"), rule);
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rule->states_cur = nvlist_get_number(nvl, "states_cur");
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rule->states_tot = nvlist_get_number(nvl, "states_tot");
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rule->src_nodes = nvlist_get_number(nvl, "src_nodes");
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}
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int
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pfctl_add_rule(int dev, const struct pfctl_rule *r, const char *anchor,
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const char *anchor_call, u_int32_t ticket, u_int32_t pool_ticket)
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{
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struct pfioc_nv nv;
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u_int64_t timeouts[PFTM_MAX];
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u_int64_t set_prio[2];
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nvlist_t *nvl, *nvlr;
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int ret;
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nvl = nvlist_create(0);
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nvlr = nvlist_create(0);
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nvlist_add_number(nvl, "ticket", ticket);
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nvlist_add_number(nvl, "pool_ticket", pool_ticket);
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nvlist_add_string(nvl, "anchor", anchor);
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nvlist_add_string(nvl, "anchor_call", anchor_call);
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nvlist_add_number(nvlr, "nr", r->nr);
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pfctl_nv_add_rule_addr(nvlr, "src", &r->src);
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pfctl_nv_add_rule_addr(nvlr, "dst", &r->dst);
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nvlist_add_string(nvlr, "label", r->label);
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nvlist_add_string(nvlr, "ifname", r->ifname);
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nvlist_add_string(nvlr, "qname", r->qname);
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|
nvlist_add_string(nvlr, "pqname", r->pqname);
|
|
nvlist_add_string(nvlr, "tagname", r->tagname);
|
|
nvlist_add_string(nvlr, "match_tagname", r->match_tagname);
|
|
nvlist_add_string(nvlr, "overload_tblname", r->overload_tblname);
|
|
|
|
pfctl_nv_add_pool(nvlr, "rpool", &r->rpool);
|
|
|
|
nvlist_add_number(nvlr, "os_fingerprint", r->os_fingerprint);
|
|
|
|
nvlist_add_number(nvlr, "rtableid", r->rtableid);
|
|
for (int i = 0; i < PFTM_MAX; i++)
|
|
timeouts[i] = r->timeout[i];
|
|
nvlist_add_number_array(nvlr, "timeout", timeouts, PFTM_MAX);
|
|
nvlist_add_number(nvlr, "max_states", r->max_states);
|
|
nvlist_add_number(nvlr, "max_src_nodes", r->max_src_nodes);
|
|
nvlist_add_number(nvlr, "max_src_states", r->max_src_states);
|
|
nvlist_add_number(nvlr, "max_src_conn", r->max_src_conn);
|
|
nvlist_add_number(nvlr, "max_src_conn_rate.limit",
|
|
r->max_src_conn_rate.limit);
|
|
nvlist_add_number(nvlr, "max_src_conn_rate.seconds",
|
|
r->max_src_conn_rate.seconds);
|
|
nvlist_add_number(nvlr, "prob", r->prob);
|
|
nvlist_add_number(nvlr, "cuid", r->cuid);
|
|
nvlist_add_number(nvlr, "cpid", r->cpid);
|
|
|
|
nvlist_add_number(nvlr, "return_icmp", r->return_icmp);
|
|
nvlist_add_number(nvlr, "return_icmp6", r->return_icmp6);
|
|
|
|
nvlist_add_number(nvlr, "max_mss", r->max_mss);
|
|
nvlist_add_number(nvlr, "scrub_flags", r->scrub_flags);
|
|
|
|
pfctl_nv_add_uid(nvlr, "uid", &r->uid);
|
|
pfctl_nv_add_uid(nvlr, "gid", (const struct pf_rule_uid *)&r->gid);
|
|
|
|
nvlist_add_number(nvlr, "rule_flag", r->rule_flag);
|
|
nvlist_add_number(nvlr, "action", r->action);
|
|
nvlist_add_number(nvlr, "direction", r->direction);
|
|
nvlist_add_number(nvlr, "log", r->log);
|
|
nvlist_add_number(nvlr, "logif", r->logif);
|
|
nvlist_add_number(nvlr, "quick", r->quick);
|
|
nvlist_add_number(nvlr, "ifnot", r->ifnot);
|
|
nvlist_add_number(nvlr, "match_tag_not", r->match_tag_not);
|
|
nvlist_add_number(nvlr, "natpass", r->natpass);
|
|
|
|
nvlist_add_number(nvlr, "keep_state", r->keep_state);
|
|
nvlist_add_number(nvlr, "af", r->af);
|
|
nvlist_add_number(nvlr, "proto", r->proto);
|
|
nvlist_add_number(nvlr, "type", r->type);
|
|
nvlist_add_number(nvlr, "code", r->code);
|
|
nvlist_add_number(nvlr, "flags", r->flags);
|
|
nvlist_add_number(nvlr, "flagset", r->flagset);
|
|
nvlist_add_number(nvlr, "min_ttl", r->min_ttl);
|
|
nvlist_add_number(nvlr, "allow_opts", r->allow_opts);
|
|
nvlist_add_number(nvlr, "rt", r->rt);
|
|
nvlist_add_number(nvlr, "return_ttl", r->return_ttl);
|
|
nvlist_add_number(nvlr, "tos", r->tos);
|
|
nvlist_add_number(nvlr, "set_tos", r->set_tos);
|
|
nvlist_add_number(nvlr, "anchor_relative", r->anchor_relative);
|
|
nvlist_add_number(nvlr, "anchor_wildcard", r->anchor_wildcard);
|
|
|
|
nvlist_add_number(nvlr, "flush", r->flush);
|
|
|
|
nvlist_add_number(nvlr, "prio", r->prio);
|
|
set_prio[0] = r->set_prio[0];
|
|
set_prio[1] = r->set_prio[1];
|
|
nvlist_add_number_array(nvlr, "set_prio", set_prio, 2);
|
|
|
|
pfctl_nv_add_divert(nvlr, "divert", r);
|
|
|
|
nvlist_add_nvlist(nvl, "rule", nvlr);
|
|
|
|
/* Now do the call. */
|
|
nv.data = nvlist_pack(nvl, &nv.len);
|
|
nv.size = nv.len;
|
|
|
|
ret = ioctl(dev, DIOCADDRULENV, &nv);
|
|
|
|
free(nv.data);
|
|
nvlist_destroy(nvl);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
pfctl_get_rule(int dev, u_int32_t nr, u_int32_t ticket, const char *anchor,
|
|
u_int32_t ruleset, struct pfctl_rule *rule, char *anchor_call)
|
|
{
|
|
struct pfioc_nv nv;
|
|
nvlist_t *nvl;
|
|
void *nvlpacked;
|
|
int ret;
|
|
|
|
nvl = nvlist_create(0);
|
|
if (nvl == 0)
|
|
return (ENOMEM);
|
|
|
|
nvlist_add_number(nvl, "nr", nr);
|
|
nvlist_add_number(nvl, "ticket", ticket);
|
|
nvlist_add_string(nvl, "anchor", anchor);
|
|
nvlist_add_number(nvl, "ruleset", ruleset);
|
|
|
|
nvlpacked = nvlist_pack(nvl, &nv.len);
|
|
if (nvlpacked == NULL) {
|
|
nvlist_destroy(nvl);
|
|
return (ENOMEM);
|
|
}
|
|
nv.data = malloc(8182);
|
|
nv.size = 8192;
|
|
assert(nv.len <= nv.size);
|
|
memcpy(nv.data, nvlpacked, nv.len);
|
|
nvlist_destroy(nvl);
|
|
nvl = NULL;
|
|
free(nvlpacked);
|
|
|
|
ret = ioctl(dev, DIOCGETRULENV, &nv);
|
|
if (ret != 0) {
|
|
free(nv.data);
|
|
return (ret);
|
|
}
|
|
|
|
nvl = nvlist_unpack(nv.data, nv.len, 0);
|
|
if (nvl == NULL) {
|
|
free(nv.data);
|
|
return (EIO);
|
|
}
|
|
|
|
pf_nvrule_to_rule(nvlist_get_nvlist(nvl, "rule"), rule);
|
|
|
|
if (anchor_call)
|
|
strlcpy(anchor_call, nvlist_get_string(nvl, "anchor_call"),
|
|
MAXPATHLEN);
|
|
|
|
free(nv.data);
|
|
nvlist_destroy(nvl);
|
|
|
|
return (0);
|
|
}
|