2138 lines
45 KiB
C
2138 lines
45 KiB
C
/* $KAME: pfkey.c,v 1.46 2003/08/26 03:37:06 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <net/pfkeyv2.h>
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#include <netipsec/key_var.h>
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#include <netinet/in.h>
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#include <netipsec/ipsec.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include "ipsec_strerror.h"
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#include "libpfkey.h"
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#define CALLOC(size, cast) (cast)calloc(1, (size))
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static int findsupportedmap(int);
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static int setsupportedmap(struct sadb_supported *);
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static struct sadb_alg *findsupportedalg(u_int, u_int);
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static int pfkey_send_x1(int, u_int, u_int, u_int, struct sockaddr *,
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struct sockaddr *, u_int32_t, u_int32_t, u_int, caddr_t,
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u_int, u_int, u_int, u_int, u_int, u_int32_t, u_int32_t,
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u_int32_t, u_int32_t, u_int32_t);
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static int pfkey_send_x2(int, u_int, u_int, u_int,
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struct sockaddr *, struct sockaddr *, u_int32_t);
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static int pfkey_send_x3(int, u_int, u_int);
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static int pfkey_send_x4(int, u_int, struct sockaddr *, u_int,
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struct sockaddr *, u_int, u_int, u_int64_t, u_int64_t,
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char *, int, u_int32_t);
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static int pfkey_send_x5(int, u_int, u_int32_t);
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static caddr_t pfkey_setsadbmsg(caddr_t, caddr_t, u_int, u_int,
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u_int, u_int32_t, pid_t);
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static caddr_t pfkey_setsadbsa(caddr_t, caddr_t, u_int32_t, u_int,
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u_int, u_int, u_int32_t);
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static caddr_t pfkey_setsadbaddr(caddr_t, caddr_t, u_int,
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struct sockaddr *, u_int, u_int);
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static caddr_t pfkey_setsadbkey(caddr_t, caddr_t, u_int, caddr_t, u_int);
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static caddr_t pfkey_setsadblifetime(caddr_t, caddr_t, u_int, u_int32_t,
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u_int32_t, u_int32_t, u_int32_t);
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static caddr_t pfkey_setsadbxsa2(caddr_t, caddr_t, u_int32_t, u_int32_t);
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/*
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* make and search supported algorithm structure.
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*/
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static struct sadb_supported *ipsec_supported[] = { NULL, NULL, NULL, NULL };
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static int supported_map[] = {
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SADB_SATYPE_AH,
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SADB_SATYPE_ESP,
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SADB_X_SATYPE_IPCOMP,
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SADB_X_SATYPE_TCPSIGNATURE
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};
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static int
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findsupportedmap(satype)
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int satype;
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{
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int i;
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for (i = 0; i < sizeof(supported_map)/sizeof(supported_map[0]); i++)
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if (supported_map[i] == satype)
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return i;
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return -1;
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}
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static struct sadb_alg *
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findsupportedalg(satype, alg_id)
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u_int satype, alg_id;
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{
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int algno;
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int tlen;
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caddr_t p;
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/* validity check */
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algno = findsupportedmap(satype);
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if (algno == -1) {
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return NULL;
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}
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if (ipsec_supported[algno] == NULL) {
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__ipsec_errcode = EIPSEC_DO_GET_SUPP_LIST;
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return NULL;
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}
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tlen = ipsec_supported[algno]->sadb_supported_len
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- sizeof(struct sadb_supported);
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p = (caddr_t)(ipsec_supported[algno] + 1);
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while (tlen > 0) {
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if (tlen < sizeof(struct sadb_alg)) {
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/* invalid format */
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break;
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}
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if (((struct sadb_alg *)p)->sadb_alg_id == alg_id)
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return (struct sadb_alg *)p;
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tlen -= sizeof(struct sadb_alg);
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p += sizeof(struct sadb_alg);
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}
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__ipsec_errcode = EIPSEC_NOT_SUPPORTED;
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return NULL;
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}
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static int
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setsupportedmap(sup)
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struct sadb_supported *sup;
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{
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struct sadb_supported **ipsup;
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switch (sup->sadb_supported_exttype) {
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case SADB_EXT_SUPPORTED_AUTH:
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ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_AH)];
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break;
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case SADB_EXT_SUPPORTED_ENCRYPT:
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ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_ESP)];
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_SATYPE;
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return -1;
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}
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if (*ipsup)
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free(*ipsup);
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*ipsup = malloc(sup->sadb_supported_len);
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if (!*ipsup) {
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__ipsec_set_strerror(strerror(errno));
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return -1;
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}
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memcpy(*ipsup, sup, sup->sadb_supported_len);
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return 0;
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}
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/*
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* check key length against algorithm specified.
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* This function is called with SADB_EXT_SUPPORTED_{AUTH,ENCRYPT} as the
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* augument, and only calls to ipsec_check_keylen2();
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* keylen is the unit of bit.
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* OUT:
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* -1: invalid.
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* 0: valid.
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*/
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int
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ipsec_check_keylen(supported, alg_id, keylen)
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u_int supported;
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u_int alg_id;
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u_int keylen;
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{
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int satype;
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/* validity check */
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switch (supported) {
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case SADB_EXT_SUPPORTED_AUTH:
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satype = SADB_SATYPE_AH;
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break;
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case SADB_EXT_SUPPORTED_ENCRYPT:
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satype = SADB_SATYPE_ESP;
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return -1;
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}
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return ipsec_check_keylen2(satype, alg_id, keylen);
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}
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/*
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* check key length against algorithm specified.
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* satype is one of satype defined at pfkeyv2.h.
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* keylen is the unit of bit.
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* OUT:
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* -1: invalid.
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* 0: valid.
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*/
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int
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ipsec_check_keylen2(satype, alg_id, keylen)
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u_int satype;
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u_int alg_id;
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u_int keylen;
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{
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struct sadb_alg *alg;
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alg = findsupportedalg(satype, alg_id);
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if (!alg)
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return -1;
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if (keylen < alg->sadb_alg_minbits || keylen > alg->sadb_alg_maxbits) {
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__ipsec_errcode = EIPSEC_INVAL_KEYLEN;
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return -1;
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}
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__ipsec_errcode = EIPSEC_NO_ERROR;
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return 0;
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}
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/*
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* get max/min key length against algorithm specified.
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* satype is one of satype defined at pfkeyv2.h.
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* keylen is the unit of bit.
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* OUT:
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* -1: invalid.
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* 0: valid.
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*/
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int
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ipsec_get_keylen(supported, alg_id, alg0)
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u_int supported, alg_id;
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struct sadb_alg *alg0;
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{
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struct sadb_alg *alg;
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u_int satype;
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/* validity check */
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if (!alg0) {
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return -1;
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}
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switch (supported) {
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case SADB_EXT_SUPPORTED_AUTH:
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satype = SADB_SATYPE_AH;
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break;
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case SADB_EXT_SUPPORTED_ENCRYPT:
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satype = SADB_SATYPE_ESP;
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return -1;
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}
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alg = findsupportedalg(satype, alg_id);
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if (!alg)
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return -1;
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memcpy(alg0, alg, sizeof(*alg0));
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__ipsec_errcode = EIPSEC_NO_ERROR;
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return 0;
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}
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/*
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* set the rate for SOFT lifetime against HARD one.
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* If rate is more than 100 or equal to zero, then set to 100.
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*/
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static u_int soft_lifetime_allocations_rate = PFKEY_SOFT_LIFETIME_RATE;
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static u_int soft_lifetime_bytes_rate = PFKEY_SOFT_LIFETIME_RATE;
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static u_int soft_lifetime_addtime_rate = PFKEY_SOFT_LIFETIME_RATE;
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static u_int soft_lifetime_usetime_rate = PFKEY_SOFT_LIFETIME_RATE;
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u_int
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pfkey_set_softrate(type, rate)
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u_int type, rate;
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{
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__ipsec_errcode = EIPSEC_NO_ERROR;
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if (rate > 100 || rate == 0)
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rate = 100;
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switch (type) {
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case SADB_X_LIFETIME_ALLOCATIONS:
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soft_lifetime_allocations_rate = rate;
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return 0;
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case SADB_X_LIFETIME_BYTES:
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soft_lifetime_bytes_rate = rate;
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return 0;
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case SADB_X_LIFETIME_ADDTIME:
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soft_lifetime_addtime_rate = rate;
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return 0;
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case SADB_X_LIFETIME_USETIME:
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soft_lifetime_usetime_rate = rate;
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return 0;
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}
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return 1;
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}
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/*
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* get current rate for SOFT lifetime against HARD one.
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* ATTENTION: ~0 is returned if invalid type was passed.
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*/
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u_int
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pfkey_get_softrate(type)
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u_int type;
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{
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switch (type) {
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case SADB_X_LIFETIME_ALLOCATIONS:
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return soft_lifetime_allocations_rate;
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case SADB_X_LIFETIME_BYTES:
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return soft_lifetime_bytes_rate;
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case SADB_X_LIFETIME_ADDTIME:
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return soft_lifetime_addtime_rate;
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case SADB_X_LIFETIME_USETIME:
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return soft_lifetime_usetime_rate;
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}
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return ~0;
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}
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/*
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* sending SADB_GETSPI message to the kernel.
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* OUT:
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* positive: success and return length sent.
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* -1 : error occured, and set errno.
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*/
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int
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pfkey_send_getspi(so, satype, mode, src, dst, min, max, reqid, seq)
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int so;
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u_int satype, mode;
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struct sockaddr *src, *dst;
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u_int32_t min, max, reqid, seq;
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{
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struct sadb_msg *newmsg;
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caddr_t ep;
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int len;
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int need_spirange = 0;
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caddr_t p;
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int plen;
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/* validity check */
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if (src == NULL || dst == NULL) {
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__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
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return -1;
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}
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if (src->sa_family != dst->sa_family) {
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__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
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return -1;
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}
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if (min > max || (min > 0 && min <= 255)) {
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__ipsec_errcode = EIPSEC_INVAL_SPI;
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return -1;
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}
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switch (src->sa_family) {
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case AF_INET:
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plen = sizeof(struct in_addr) << 3;
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break;
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case AF_INET6:
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plen = sizeof(struct in6_addr) << 3;
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_FAMILY;
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return -1;
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}
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/* create new sadb_msg to send. */
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len = sizeof(struct sadb_msg)
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+ sizeof(struct sadb_x_sa2)
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+ sizeof(struct sadb_address)
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+ PFKEY_ALIGN8(src->sa_len)
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+ sizeof(struct sadb_address)
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+ PFKEY_ALIGN8(dst->sa_len);
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if (min > 255 && max < ~0) {
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need_spirange++;
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len += sizeof(struct sadb_spirange);
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}
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if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
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__ipsec_set_strerror(strerror(errno));
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return -1;
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}
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ep = ((caddr_t)newmsg) + len;
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p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_GETSPI,
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len, satype, seq, getpid());
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if (!p) {
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free(newmsg);
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return -1;
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}
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p = pfkey_setsadbxsa2(p, ep, mode, reqid);
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if (!p) {
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free(newmsg);
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return -1;
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}
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/* set sadb_address for source */
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p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen,
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IPSEC_ULPROTO_ANY);
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if (!p) {
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free(newmsg);
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return -1;
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}
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/* set sadb_address for destination */
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p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen,
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IPSEC_ULPROTO_ANY);
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if (!p) {
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free(newmsg);
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return -1;
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}
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/* proccessing spi range */
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if (need_spirange) {
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struct sadb_spirange spirange;
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if (p + sizeof(spirange) > ep) {
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free(newmsg);
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return -1;
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}
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memset(&spirange, 0, sizeof(spirange));
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spirange.sadb_spirange_len = PFKEY_UNIT64(sizeof(spirange));
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spirange.sadb_spirange_exttype = SADB_EXT_SPIRANGE;
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spirange.sadb_spirange_min = min;
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spirange.sadb_spirange_max = max;
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memcpy(p, &spirange, sizeof(spirange));
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p += sizeof(spirange);
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}
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if (p != ep) {
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free(newmsg);
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return -1;
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}
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/* send message */
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len = pfkey_send(so, newmsg, len);
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free(newmsg);
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if (len < 0)
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return -1;
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__ipsec_errcode = EIPSEC_NO_ERROR;
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return len;
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}
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/*
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* sending SADB_UPDATE message to the kernel.
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* The length of key material is a_keylen + e_keylen.
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* OUT:
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* positive: success and return length sent.
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* -1 : error occured, and set errno.
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*/
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int
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pfkey_send_update(so, satype, mode, src, dst, spi, reqid, wsize,
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keymat, e_type, e_keylen, a_type, a_keylen, flags,
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l_alloc, l_bytes, l_addtime, l_usetime, seq)
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int so;
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u_int satype, mode, wsize;
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struct sockaddr *src, *dst;
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u_int32_t spi, reqid;
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caddr_t keymat;
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u_int e_type, e_keylen, a_type, a_keylen, flags;
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u_int32_t l_alloc;
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u_int64_t l_bytes, l_addtime, l_usetime;
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u_int32_t seq;
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{
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int len;
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if ((len = pfkey_send_x1(so, SADB_UPDATE, satype, mode, src, dst, spi,
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reqid, wsize,
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keymat, e_type, e_keylen, a_type, a_keylen, flags,
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l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0)
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return -1;
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return len;
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}
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/*
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* sending SADB_ADD message to the kernel.
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* The length of key material is a_keylen + e_keylen.
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* OUT:
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* positive: success and return length sent.
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* -1 : error occured, and set errno.
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*/
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int
|
|
pfkey_send_add(so, satype, mode, src, dst, spi, reqid, wsize,
|
|
keymat, e_type, e_keylen, a_type, a_keylen, flags,
|
|
l_alloc, l_bytes, l_addtime, l_usetime, seq)
|
|
int so;
|
|
u_int satype, mode, wsize;
|
|
struct sockaddr *src, *dst;
|
|
u_int32_t spi, reqid;
|
|
caddr_t keymat;
|
|
u_int e_type, e_keylen, a_type, a_keylen, flags;
|
|
u_int32_t l_alloc;
|
|
u_int64_t l_bytes, l_addtime, l_usetime;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
if ((len = pfkey_send_x1(so, SADB_ADD, satype, mode, src, dst, spi,
|
|
reqid, wsize,
|
|
keymat, e_type, e_keylen, a_type, a_keylen, flags,
|
|
l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_DELETE message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_delete(so, satype, mode, src, dst, spi)
|
|
int so;
|
|
u_int satype, mode;
|
|
struct sockaddr *src, *dst;
|
|
u_int32_t spi;
|
|
{
|
|
int len;
|
|
if ((len = pfkey_send_x2(so, SADB_DELETE, satype, mode, src, dst, spi)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_DELETE without spi to the kernel. This is
|
|
* the "delete all" request (an extension also present in
|
|
* Solaris).
|
|
*
|
|
* OUT:
|
|
* positive: success and return length sent
|
|
* -1 : error occured, and set errno
|
|
*/
|
|
int
|
|
pfkey_send_delete_all(so, satype, mode, src, dst)
|
|
int so;
|
|
u_int satype, mode;
|
|
struct sockaddr *src, *dst;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
int len;
|
|
caddr_t p;
|
|
int plen;
|
|
caddr_t ep;
|
|
|
|
/* validity check */
|
|
if (src == NULL || dst == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
if (src->sa_family != dst->sa_family) {
|
|
__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
|
|
return -1;
|
|
}
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
plen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
plen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_FAMILY;
|
|
return -1;
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = sizeof(struct sadb_msg)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(src->sa_len)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(dst->sa_len);
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_DELETE, len, satype, 0,
|
|
getpid());
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p || p != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_GET message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_get(so, satype, mode, src, dst, spi)
|
|
int so;
|
|
u_int satype, mode;
|
|
struct sockaddr *src, *dst;
|
|
u_int32_t spi;
|
|
{
|
|
int len;
|
|
if ((len = pfkey_send_x2(so, SADB_GET, satype, mode, src, dst, spi)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_REGISTER message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_register(so, satype)
|
|
int so;
|
|
u_int satype;
|
|
{
|
|
int len, algno;
|
|
|
|
if (satype == SADB_SATYPE_UNSPEC) {
|
|
for (algno = 0;
|
|
algno < sizeof(supported_map)/sizeof(supported_map[0]);
|
|
algno++) {
|
|
if (ipsec_supported[algno]) {
|
|
free(ipsec_supported[algno]);
|
|
ipsec_supported[algno] = NULL;
|
|
}
|
|
}
|
|
} else {
|
|
algno = findsupportedmap(satype);
|
|
if (algno == -1) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
if (ipsec_supported[algno]) {
|
|
free(ipsec_supported[algno]);
|
|
ipsec_supported[algno] = NULL;
|
|
}
|
|
}
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_REGISTER, satype)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* receiving SADB_REGISTER message from the kernel, and copy buffer for
|
|
* sadb_supported returned into ipsec_supported.
|
|
* OUT:
|
|
* 0: success and return length sent.
|
|
* -1: error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_recv_register(so)
|
|
int so;
|
|
{
|
|
pid_t pid = getpid();
|
|
struct sadb_msg *newmsg;
|
|
int error = -1;
|
|
|
|
/* receive message */
|
|
for (;;) {
|
|
if ((newmsg = pfkey_recv(so)) == NULL)
|
|
return -1;
|
|
if (newmsg->sadb_msg_type == SADB_REGISTER &&
|
|
newmsg->sadb_msg_pid == pid)
|
|
break;
|
|
free(newmsg);
|
|
}
|
|
|
|
/* check and fix */
|
|
newmsg->sadb_msg_len = PFKEY_UNUNIT64(newmsg->sadb_msg_len);
|
|
|
|
error = pfkey_set_supported(newmsg, newmsg->sadb_msg_len);
|
|
free(newmsg);
|
|
|
|
if (error == 0)
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* receiving SADB_REGISTER message from the kernel, and copy buffer for
|
|
* sadb_supported returned into ipsec_supported.
|
|
* NOTE: sadb_msg_len must be host order.
|
|
* IN:
|
|
* tlen: msg length, it's to makeing sure.
|
|
* OUT:
|
|
* 0: success and return length sent.
|
|
* -1: error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_set_supported(msg, tlen)
|
|
struct sadb_msg *msg;
|
|
int tlen;
|
|
{
|
|
struct sadb_supported *sup;
|
|
caddr_t p;
|
|
caddr_t ep;
|
|
|
|
/* validity */
|
|
if (msg->sadb_msg_len != tlen) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
p = (caddr_t)msg;
|
|
ep = p + tlen;
|
|
|
|
p += sizeof(struct sadb_msg);
|
|
|
|
while (p < ep) {
|
|
sup = (struct sadb_supported *)p;
|
|
if (ep < p + sizeof(*sup) ||
|
|
PFKEY_EXTLEN(sup) < sizeof(*sup) ||
|
|
ep < p + sup->sadb_supported_len) {
|
|
/* invalid format */
|
|
break;
|
|
}
|
|
|
|
switch (sup->sadb_supported_exttype) {
|
|
case SADB_EXT_SUPPORTED_AUTH:
|
|
case SADB_EXT_SUPPORTED_ENCRYPT:
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
|
|
/* fixed length */
|
|
sup->sadb_supported_len = PFKEY_EXTLEN(sup);
|
|
|
|
/* set supported map */
|
|
if (setsupportedmap(sup) != 0)
|
|
return -1;
|
|
|
|
p += sup->sadb_supported_len;
|
|
}
|
|
|
|
if (p != ep) {
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_FLUSH message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_flush(so, satype)
|
|
int so;
|
|
u_int satype;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_FLUSH, satype)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_DUMP message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_dump(so, satype)
|
|
int so;
|
|
u_int satype;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_DUMP, satype)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_PROMISC message to the kernel.
|
|
* NOTE that this function handles promisc mode toggle only.
|
|
* IN:
|
|
* flag: set promisc off if zero, set promisc on if non-zero.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
* 0 : error occured, and set errno.
|
|
* others: a pointer to new allocated buffer in which supported
|
|
* algorithms is.
|
|
*/
|
|
int
|
|
pfkey_send_promisc_toggle(so, flag)
|
|
int so;
|
|
int flag;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_X_PROMISC, (flag ? 1 : 0))) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDADD message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdadd(so, src, prefs, dst, prefd, proto, policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDADD,
|
|
src, prefs, dst, prefd, proto,
|
|
0, 0,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDADD message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdadd2(so, src, prefs, dst, prefd, proto, ltime, vtime,
|
|
policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
u_int64_t ltime, vtime;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDADD,
|
|
src, prefs, dst, prefd, proto,
|
|
ltime, vtime,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDUPDATE message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdupdate(so, src, prefs, dst, prefd, proto, policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE,
|
|
src, prefs, dst, prefd, proto,
|
|
0, 0,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDUPDATE message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdupdate2(so, src, prefs, dst, prefd, proto, ltime, vtime,
|
|
policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
u_int64_t ltime, vtime;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE,
|
|
src, prefs, dst, prefd, proto,
|
|
ltime, vtime,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDDELETE message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spddelete(so, src, prefs, dst, prefd, proto, policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if (policylen != sizeof(struct sadb_x_policy)) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDDELETE,
|
|
src, prefs, dst, prefd, proto,
|
|
0, 0,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDDELETE message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spddelete2(so, spid)
|
|
int so;
|
|
u_int32_t spid;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x5(so, SADB_X_SPDDELETE2, spid)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDGET message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdget(so, spid)
|
|
int so;
|
|
u_int32_t spid;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x5(so, SADB_X_SPDGET, spid)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_X_SPDSETIDX message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdsetidx(so, src, prefs, dst, prefd, proto, policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int prefs, prefd, proto;
|
|
caddr_t policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
int len;
|
|
|
|
if (policylen != sizeof(struct sadb_x_policy)) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
if ((len = pfkey_send_x4(so, SADB_X_SPDSETIDX,
|
|
src, prefs, dst, prefd, proto,
|
|
0, 0,
|
|
policy, policylen, seq)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_SPDFLUSH message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spdflush(so)
|
|
int so;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_X_SPDFLUSH, SADB_SATYPE_UNSPEC)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_SPDDUMP message to the kernel.
|
|
* OUT:
|
|
* positive: success and return length sent.
|
|
* -1 : error occured, and set errno.
|
|
*/
|
|
int
|
|
pfkey_send_spddump(so)
|
|
int so;
|
|
{
|
|
int len;
|
|
|
|
if ((len = pfkey_send_x3(so, SADB_X_SPDDUMP, SADB_SATYPE_UNSPEC)) < 0)
|
|
return -1;
|
|
|
|
return len;
|
|
}
|
|
|
|
/* sending SADB_ADD or SADB_UPDATE message to the kernel */
|
|
static int
|
|
pfkey_send_x1(so, type, satype, mode, src, dst, spi, reqid, wsize,
|
|
keymat, e_type, e_keylen, a_type, a_keylen, flags,
|
|
l_alloc, l_bytes, l_addtime, l_usetime, seq)
|
|
int so;
|
|
u_int type, satype, mode;
|
|
struct sockaddr *src, *dst;
|
|
u_int32_t spi, reqid;
|
|
u_int wsize;
|
|
caddr_t keymat;
|
|
u_int e_type, e_keylen, a_type, a_keylen, flags;
|
|
u_int32_t l_alloc, l_bytes, l_addtime, l_usetime, seq;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
int len;
|
|
caddr_t p;
|
|
int plen;
|
|
caddr_t ep;
|
|
|
|
/* validity check */
|
|
if (src == NULL || dst == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
if (src->sa_family != dst->sa_family) {
|
|
__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
|
|
return -1;
|
|
}
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
plen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
plen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_FAMILY;
|
|
return -1;
|
|
}
|
|
|
|
switch (satype) {
|
|
case SADB_SATYPE_ESP:
|
|
if (e_type == SADB_EALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_NO_ALGS;
|
|
return -1;
|
|
}
|
|
break;
|
|
case SADB_SATYPE_AH:
|
|
if (e_type != SADB_EALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ALGS;
|
|
return -1;
|
|
}
|
|
if (a_type == SADB_AALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_NO_ALGS;
|
|
return -1;
|
|
}
|
|
break;
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
if (e_type == SADB_X_CALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ALGS;
|
|
return -1;
|
|
}
|
|
if (a_type != SADB_AALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_NO_ALGS;
|
|
return -1;
|
|
}
|
|
break;
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
if (e_type != SADB_EALG_NONE) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ALGS;
|
|
return -1;
|
|
}
|
|
if (a_type != SADB_X_AALG_TCP_MD5) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ALGS;
|
|
return -1;
|
|
}
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = sizeof(struct sadb_msg)
|
|
+ sizeof(struct sadb_sa)
|
|
+ sizeof(struct sadb_x_sa2)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(src->sa_len)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(dst->sa_len)
|
|
+ sizeof(struct sadb_lifetime)
|
|
+ sizeof(struct sadb_lifetime);
|
|
|
|
if (e_type != SADB_EALG_NONE)
|
|
len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(e_keylen));
|
|
if (a_type != SADB_AALG_NONE)
|
|
len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(a_keylen));
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len,
|
|
satype, seq, getpid());
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbsa(p, ep, spi, wsize, a_type, e_type, flags);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbxsa2(p, ep, mode, reqid);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
if (e_type != SADB_EALG_NONE) {
|
|
p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_ENCRYPT,
|
|
keymat, e_keylen);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
}
|
|
if (a_type != SADB_AALG_NONE) {
|
|
p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_AUTH,
|
|
keymat + e_keylen, a_keylen);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* set sadb_lifetime for destination */
|
|
p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD,
|
|
l_alloc, l_bytes, l_addtime, l_usetime);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_SOFT,
|
|
l_alloc, l_bytes, l_addtime, l_usetime);
|
|
if (!p || p != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/* sending SADB_DELETE or SADB_GET message to the kernel */
|
|
static int
|
|
pfkey_send_x2(so, type, satype, mode, src, dst, spi)
|
|
int so;
|
|
u_int type, satype, mode;
|
|
struct sockaddr *src, *dst;
|
|
u_int32_t spi;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
int len;
|
|
caddr_t p;
|
|
int plen;
|
|
caddr_t ep;
|
|
|
|
/* validity check */
|
|
if (src == NULL || dst == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
if (src->sa_family != dst->sa_family) {
|
|
__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
|
|
return -1;
|
|
}
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
plen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
plen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_FAMILY;
|
|
return -1;
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = sizeof(struct sadb_msg)
|
|
+ sizeof(struct sadb_sa)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(src->sa_len)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(dst->sa_len);
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0,
|
|
getpid());
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbsa(p, ep, spi, 0, 0, 0, 0);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen,
|
|
IPSEC_ULPROTO_ANY);
|
|
if (!p || p != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* sending SADB_REGISTER, SADB_FLUSH, SADB_DUMP or SADB_X_PROMISC message
|
|
* to the kernel
|
|
*/
|
|
static int
|
|
pfkey_send_x3(so, type, satype)
|
|
int so;
|
|
u_int type, satype;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
int len;
|
|
caddr_t p;
|
|
caddr_t ep;
|
|
|
|
/* validity check */
|
|
switch (type) {
|
|
case SADB_X_PROMISC:
|
|
if (satype != 0 && satype != 1) {
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
break;
|
|
default:
|
|
switch (satype) {
|
|
case SADB_SATYPE_UNSPEC:
|
|
case SADB_SATYPE_AH:
|
|
case SADB_SATYPE_ESP:
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* create new sadb_msg to send. */
|
|
len = sizeof(struct sadb_msg);
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0,
|
|
getpid());
|
|
if (!p || p != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/* sending SADB_X_SPDADD message to the kernel */
|
|
static int
|
|
pfkey_send_x4(so, type, src, prefs, dst, prefd, proto,
|
|
ltime, vtime, policy, policylen, seq)
|
|
int so;
|
|
struct sockaddr *src, *dst;
|
|
u_int type, prefs, prefd, proto;
|
|
u_int64_t ltime, vtime;
|
|
char *policy;
|
|
int policylen;
|
|
u_int32_t seq;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
int len;
|
|
caddr_t p;
|
|
int plen;
|
|
caddr_t ep;
|
|
|
|
/* validity check */
|
|
if (src == NULL || dst == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
if (src->sa_family != dst->sa_family) {
|
|
__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
|
|
return -1;
|
|
}
|
|
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
plen = sizeof(struct in_addr) << 3;
|
|
break;
|
|
case AF_INET6:
|
|
plen = sizeof(struct in6_addr) << 3;
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_FAMILY;
|
|
return -1;
|
|
}
|
|
if (prefs > plen || prefd > plen) {
|
|
__ipsec_errcode = EIPSEC_INVAL_PREFIXLEN;
|
|
return -1;
|
|
}
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = sizeof(struct sadb_msg)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(src->sa_len)
|
|
+ sizeof(struct sadb_address)
|
|
+ PFKEY_ALIGN8(src->sa_len)
|
|
+ sizeof(struct sadb_lifetime)
|
|
+ policylen;
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len,
|
|
SADB_SATYPE_UNSPEC, seq, getpid());
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, prefs, proto);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, prefd, proto);
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD,
|
|
0, 0, ltime, vtime);
|
|
if (!p || p + policylen != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
memcpy(p, policy, policylen);
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/* sending SADB_X_SPDGET or SADB_X_SPDDELETE message to the kernel */
|
|
static int
|
|
pfkey_send_x5(so, type, spid)
|
|
int so;
|
|
u_int type;
|
|
u_int32_t spid;
|
|
{
|
|
struct sadb_msg *newmsg;
|
|
struct sadb_x_policy xpl;
|
|
int len;
|
|
caddr_t p;
|
|
caddr_t ep;
|
|
|
|
/* create new sadb_msg to reply. */
|
|
len = sizeof(struct sadb_msg)
|
|
+ sizeof(xpl);
|
|
|
|
if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
ep = ((caddr_t)newmsg) + len;
|
|
|
|
p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len,
|
|
SADB_SATYPE_UNSPEC, 0, getpid());
|
|
if (!p) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
|
|
if (p + sizeof(xpl) != ep) {
|
|
free(newmsg);
|
|
return -1;
|
|
}
|
|
memset(&xpl, 0, sizeof(xpl));
|
|
xpl.sadb_x_policy_len = PFKEY_UNIT64(sizeof(xpl));
|
|
xpl.sadb_x_policy_exttype = SADB_X_EXT_POLICY;
|
|
xpl.sadb_x_policy_id = spid;
|
|
memcpy(p, &xpl, sizeof(xpl));
|
|
|
|
/* send message */
|
|
len = pfkey_send(so, newmsg, len);
|
|
free(newmsg);
|
|
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* open a socket.
|
|
* OUT:
|
|
* -1: fail.
|
|
* others : success and return value of socket.
|
|
*/
|
|
int
|
|
pfkey_open()
|
|
{
|
|
int so;
|
|
const int bufsiz = 128 * 1024; /*is 128K enough?*/
|
|
|
|
if ((so = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) < 0) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* This is a temporary workaround for KAME PR 154.
|
|
* Don't really care even if it fails.
|
|
*/
|
|
(void)setsockopt(so, SOL_SOCKET, SO_SNDBUF, &bufsiz, sizeof(bufsiz));
|
|
(void)setsockopt(so, SOL_SOCKET, SO_RCVBUF, &bufsiz, sizeof(bufsiz));
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return so;
|
|
}
|
|
|
|
/*
|
|
* close a socket.
|
|
* OUT:
|
|
* 0: success.
|
|
* -1: fail.
|
|
*/
|
|
void
|
|
pfkey_close(so)
|
|
int so;
|
|
{
|
|
(void)close(so);
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* receive sadb_msg data, and return pointer to new buffer allocated.
|
|
* Must free this buffer later.
|
|
* OUT:
|
|
* NULL : error occured.
|
|
* others : a pointer to sadb_msg structure.
|
|
*
|
|
* XXX should be rewritten to pass length explicitly
|
|
*/
|
|
struct sadb_msg *
|
|
pfkey_recv(so)
|
|
int so;
|
|
{
|
|
struct sadb_msg buf, *newmsg;
|
|
int len, reallen;
|
|
|
|
while ((len = recv(so, (caddr_t)&buf, sizeof(buf), MSG_PEEK)) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (len < sizeof(buf)) {
|
|
recv(so, (caddr_t)&buf, sizeof(buf), 0);
|
|
__ipsec_errcode = EIPSEC_MAX;
|
|
return NULL;
|
|
}
|
|
|
|
/* read real message */
|
|
reallen = PFKEY_UNUNIT64(buf.sadb_msg_len);
|
|
if ((newmsg = CALLOC(reallen, struct sadb_msg *)) == NULL) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
while ((len = recv(so, (caddr_t)newmsg, reallen, 0)) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
__ipsec_set_strerror(strerror(errno));
|
|
free(newmsg);
|
|
return NULL;
|
|
}
|
|
|
|
if (len != reallen) {
|
|
__ipsec_errcode = EIPSEC_SYSTEM_ERROR;
|
|
free(newmsg);
|
|
return NULL;
|
|
}
|
|
|
|
/* don't trust what the kernel says, validate! */
|
|
if (PFKEY_UNUNIT64(newmsg->sadb_msg_len) != len) {
|
|
__ipsec_errcode = EIPSEC_SYSTEM_ERROR;
|
|
free(newmsg);
|
|
return NULL;
|
|
}
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return newmsg;
|
|
}
|
|
|
|
/*
|
|
* send message to a socket.
|
|
* OUT:
|
|
* others: success and return length sent.
|
|
* -1 : fail.
|
|
*/
|
|
int
|
|
pfkey_send(so, msg, len)
|
|
int so;
|
|
struct sadb_msg *msg;
|
|
int len;
|
|
{
|
|
if ((len = send(so, (caddr_t)msg, len, 0)) < 0) {
|
|
__ipsec_set_strerror(strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* %%% Utilities
|
|
* NOTE: These functions are derived from netkey/key.c in KAME.
|
|
*/
|
|
/*
|
|
* set the pointer to each header in this message buffer.
|
|
* IN: msg: pointer to message buffer.
|
|
* mhp: pointer to the buffer initialized like below:
|
|
* caddr_t mhp[SADB_EXT_MAX + 1];
|
|
* OUT: -1: invalid.
|
|
* 0: valid.
|
|
*
|
|
* XXX should be rewritten to obtain length explicitly
|
|
*/
|
|
int
|
|
pfkey_align(msg, mhp)
|
|
struct sadb_msg *msg;
|
|
caddr_t *mhp;
|
|
{
|
|
struct sadb_ext *ext;
|
|
int i;
|
|
caddr_t p;
|
|
caddr_t ep; /* XXX should be passed from upper layer */
|
|
|
|
/* validity check */
|
|
if (msg == NULL || mhp == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
/* initialize */
|
|
for (i = 0; i < SADB_EXT_MAX + 1; i++)
|
|
mhp[i] = NULL;
|
|
|
|
mhp[0] = (caddr_t)msg;
|
|
|
|
/* initialize */
|
|
p = (caddr_t) msg;
|
|
ep = p + PFKEY_UNUNIT64(msg->sadb_msg_len);
|
|
|
|
/* skip base header */
|
|
p += sizeof(struct sadb_msg);
|
|
|
|
while (p < ep) {
|
|
ext = (struct sadb_ext *)p;
|
|
if (ep < p + sizeof(*ext) || PFKEY_EXTLEN(ext) < sizeof(*ext) ||
|
|
ep < p + PFKEY_EXTLEN(ext)) {
|
|
/* invalid format */
|
|
break;
|
|
}
|
|
|
|
/* duplicate check */
|
|
/* XXX Are there duplication either KEY_AUTH or KEY_ENCRYPT ?*/
|
|
if (mhp[ext->sadb_ext_type] != NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
|
|
return -1;
|
|
}
|
|
|
|
/* set pointer */
|
|
switch (ext->sadb_ext_type) {
|
|
case SADB_EXT_SA:
|
|
case SADB_EXT_LIFETIME_CURRENT:
|
|
case SADB_EXT_LIFETIME_HARD:
|
|
case SADB_EXT_LIFETIME_SOFT:
|
|
case SADB_EXT_ADDRESS_SRC:
|
|
case SADB_EXT_ADDRESS_DST:
|
|
case SADB_EXT_ADDRESS_PROXY:
|
|
case SADB_EXT_KEY_AUTH:
|
|
/* XXX should to be check weak keys. */
|
|
case SADB_EXT_KEY_ENCRYPT:
|
|
/* XXX should to be check weak keys. */
|
|
case SADB_EXT_IDENTITY_SRC:
|
|
case SADB_EXT_IDENTITY_DST:
|
|
case SADB_EXT_SENSITIVITY:
|
|
case SADB_EXT_PROPOSAL:
|
|
case SADB_EXT_SUPPORTED_AUTH:
|
|
case SADB_EXT_SUPPORTED_ENCRYPT:
|
|
case SADB_EXT_SPIRANGE:
|
|
case SADB_X_EXT_POLICY:
|
|
case SADB_X_EXT_SA2:
|
|
mhp[ext->sadb_ext_type] = (caddr_t)ext;
|
|
break;
|
|
case SADB_X_EXT_NAT_T_TYPE:
|
|
case SADB_X_EXT_NAT_T_SPORT:
|
|
case SADB_X_EXT_NAT_T_DPORT:
|
|
/* case SADB_X_EXT_NAT_T_OA: is OAI */
|
|
case SADB_X_EXT_NAT_T_OAI:
|
|
case SADB_X_EXT_NAT_T_OAR:
|
|
case SADB_X_EXT_NAT_T_FRAG:
|
|
if (feature_present("ipsec_natt")) {
|
|
mhp[ext->sadb_ext_type] = (caddr_t)ext;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
|
|
return -1;
|
|
}
|
|
|
|
p += PFKEY_EXTLEN(ext);
|
|
}
|
|
|
|
if (p != ep) {
|
|
__ipsec_errcode = EIPSEC_INVAL_SADBMSG;
|
|
return -1;
|
|
}
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* check basic usage for sadb_msg,
|
|
* NOTE: This routine is derived from netkey/key.c in KAME.
|
|
* IN: msg: pointer to message buffer.
|
|
* mhp: pointer to the buffer initialized like below:
|
|
*
|
|
* caddr_t mhp[SADB_EXT_MAX + 1];
|
|
*
|
|
* OUT: -1: invalid.
|
|
* 0: valid.
|
|
*/
|
|
int
|
|
pfkey_check(mhp)
|
|
caddr_t *mhp;
|
|
{
|
|
struct sadb_msg *msg;
|
|
|
|
/* validity check */
|
|
if (mhp == NULL || mhp[0] == NULL) {
|
|
__ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
|
|
return -1;
|
|
}
|
|
|
|
msg = (struct sadb_msg *)mhp[0];
|
|
|
|
/* check version */
|
|
if (msg->sadb_msg_version != PF_KEY_V2) {
|
|
__ipsec_errcode = EIPSEC_INVAL_VERSION;
|
|
return -1;
|
|
}
|
|
|
|
/* check type */
|
|
if (msg->sadb_msg_type > SADB_MAX) {
|
|
__ipsec_errcode = EIPSEC_INVAL_MSGTYPE;
|
|
return -1;
|
|
}
|
|
|
|
/* check SA type */
|
|
switch (msg->sadb_msg_satype) {
|
|
case SADB_SATYPE_UNSPEC:
|
|
switch (msg->sadb_msg_type) {
|
|
case SADB_GETSPI:
|
|
case SADB_UPDATE:
|
|
case SADB_ADD:
|
|
case SADB_DELETE:
|
|
case SADB_GET:
|
|
case SADB_ACQUIRE:
|
|
case SADB_EXPIRE:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
break;
|
|
case SADB_SATYPE_ESP:
|
|
case SADB_SATYPE_AH:
|
|
case SADB_X_SATYPE_IPCOMP:
|
|
case SADB_X_SATYPE_TCPSIGNATURE:
|
|
switch (msg->sadb_msg_type) {
|
|
case SADB_X_SPDADD:
|
|
case SADB_X_SPDDELETE:
|
|
case SADB_X_SPDGET:
|
|
case SADB_X_SPDDUMP:
|
|
case SADB_X_SPDFLUSH:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
break;
|
|
case SADB_SATYPE_RSVP:
|
|
case SADB_SATYPE_OSPFV2:
|
|
case SADB_SATYPE_RIPV2:
|
|
case SADB_SATYPE_MIP:
|
|
__ipsec_errcode = EIPSEC_NOT_SUPPORTED;
|
|
return -1;
|
|
case 1: /* XXX: What does it do ? */
|
|
if (msg->sadb_msg_type == SADB_X_PROMISC)
|
|
break;
|
|
/*FALLTHROUGH*/
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_SATYPE;
|
|
return -1;
|
|
}
|
|
|
|
/* check field of upper layer protocol and address family */
|
|
if (mhp[SADB_EXT_ADDRESS_SRC] != NULL
|
|
&& mhp[SADB_EXT_ADDRESS_DST] != NULL) {
|
|
struct sadb_address *src0, *dst0;
|
|
|
|
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
|
|
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
|
|
|
|
if (src0->sadb_address_proto != dst0->sadb_address_proto) {
|
|
__ipsec_errcode = EIPSEC_PROTO_MISMATCH;
|
|
return -1;
|
|
}
|
|
|
|
if (PFKEY_ADDR_SADDR(src0)->sa_family
|
|
!= PFKEY_ADDR_SADDR(dst0)->sa_family) {
|
|
__ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
|
|
return -1;
|
|
}
|
|
|
|
switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
break;
|
|
default:
|
|
__ipsec_errcode = EIPSEC_INVAL_FAMILY;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* prefixlen == 0 is valid because there must be the case
|
|
* all addresses are matched.
|
|
*/
|
|
}
|
|
|
|
__ipsec_errcode = EIPSEC_NO_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_msg.
|
|
* `buf' must has been allocated sufficiently.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadbmsg(buf, lim, type, tlen, satype, seq, pid)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
u_int type, satype;
|
|
u_int tlen;
|
|
u_int32_t seq;
|
|
pid_t pid;
|
|
{
|
|
struct sadb_msg *p;
|
|
u_int len;
|
|
|
|
p = (struct sadb_msg *)buf;
|
|
len = sizeof(struct sadb_msg);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_msg_version = PF_KEY_V2;
|
|
p->sadb_msg_type = type;
|
|
p->sadb_msg_errno = 0;
|
|
p->sadb_msg_satype = satype;
|
|
p->sadb_msg_len = PFKEY_UNIT64(tlen);
|
|
p->sadb_msg_reserved = 0;
|
|
p->sadb_msg_seq = seq;
|
|
p->sadb_msg_pid = (u_int32_t)pid;
|
|
|
|
return(buf + len);
|
|
}
|
|
|
|
/*
|
|
* copy secasvar data into sadb_address.
|
|
* `buf' must has been allocated sufficiently.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadbsa(buf, lim, spi, wsize, auth, enc, flags)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
u_int32_t spi, flags;
|
|
u_int wsize, auth, enc;
|
|
{
|
|
struct sadb_sa *p;
|
|
u_int len;
|
|
|
|
p = (struct sadb_sa *)buf;
|
|
len = sizeof(struct sadb_sa);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_sa_len = PFKEY_UNIT64(len);
|
|
p->sadb_sa_exttype = SADB_EXT_SA;
|
|
p->sadb_sa_spi = spi;
|
|
p->sadb_sa_replay = wsize;
|
|
p->sadb_sa_state = SADB_SASTATE_LARVAL;
|
|
p->sadb_sa_auth = auth;
|
|
p->sadb_sa_encrypt = enc;
|
|
p->sadb_sa_flags = flags;
|
|
|
|
return(buf + len);
|
|
}
|
|
|
|
/*
|
|
* set data into sadb_address.
|
|
* `buf' must has been allocated sufficiently.
|
|
* prefixlen is in bits.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadbaddr(buf, lim, exttype, saddr, prefixlen, ul_proto)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
u_int exttype;
|
|
struct sockaddr *saddr;
|
|
u_int prefixlen;
|
|
u_int ul_proto;
|
|
{
|
|
struct sadb_address *p;
|
|
u_int len;
|
|
|
|
p = (struct sadb_address *)buf;
|
|
len = sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_address_len = PFKEY_UNIT64(len);
|
|
p->sadb_address_exttype = exttype & 0xffff;
|
|
p->sadb_address_proto = ul_proto & 0xff;
|
|
p->sadb_address_prefixlen = prefixlen;
|
|
p->sadb_address_reserved = 0;
|
|
|
|
memcpy(p + 1, saddr, saddr->sa_len);
|
|
|
|
return(buf + len);
|
|
}
|
|
|
|
/*
|
|
* set sadb_key structure after clearing buffer with zero.
|
|
* OUT: the pointer of buf + len.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadbkey(buf, lim, type, key, keylen)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
caddr_t key;
|
|
u_int type, keylen;
|
|
{
|
|
struct sadb_key *p;
|
|
u_int len;
|
|
|
|
p = (struct sadb_key *)buf;
|
|
len = sizeof(struct sadb_key) + PFKEY_ALIGN8(keylen);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_key_len = PFKEY_UNIT64(len);
|
|
p->sadb_key_exttype = type;
|
|
p->sadb_key_bits = keylen << 3;
|
|
p->sadb_key_reserved = 0;
|
|
|
|
memcpy(p + 1, key, keylen);
|
|
|
|
return buf + len;
|
|
}
|
|
|
|
/*
|
|
* set sadb_lifetime structure after clearing buffer with zero.
|
|
* OUT: the pointer of buf + len.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadblifetime(buf, lim, type, l_alloc, l_bytes, l_addtime, l_usetime)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
u_int type;
|
|
u_int32_t l_alloc, l_bytes, l_addtime, l_usetime;
|
|
{
|
|
struct sadb_lifetime *p;
|
|
u_int len;
|
|
|
|
p = (struct sadb_lifetime *)buf;
|
|
len = sizeof(struct sadb_lifetime);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_lifetime_len = PFKEY_UNIT64(len);
|
|
p->sadb_lifetime_exttype = type;
|
|
|
|
switch (type) {
|
|
case SADB_EXT_LIFETIME_SOFT:
|
|
p->sadb_lifetime_allocations
|
|
= (l_alloc * soft_lifetime_allocations_rate) /100;
|
|
p->sadb_lifetime_bytes
|
|
= (l_bytes * soft_lifetime_bytes_rate) /100;
|
|
p->sadb_lifetime_addtime
|
|
= (l_addtime * soft_lifetime_addtime_rate) /100;
|
|
p->sadb_lifetime_usetime
|
|
= (l_usetime * soft_lifetime_usetime_rate) /100;
|
|
break;
|
|
case SADB_EXT_LIFETIME_HARD:
|
|
p->sadb_lifetime_allocations = l_alloc;
|
|
p->sadb_lifetime_bytes = l_bytes;
|
|
p->sadb_lifetime_addtime = l_addtime;
|
|
p->sadb_lifetime_usetime = l_usetime;
|
|
break;
|
|
}
|
|
|
|
return buf + len;
|
|
}
|
|
|
|
/*
|
|
* copy secasvar data into sadb_address.
|
|
* `buf' must has been allocated sufficiently.
|
|
*/
|
|
static caddr_t
|
|
pfkey_setsadbxsa2(buf, lim, mode0, reqid)
|
|
caddr_t buf;
|
|
caddr_t lim;
|
|
u_int32_t mode0;
|
|
u_int32_t reqid;
|
|
{
|
|
struct sadb_x_sa2 *p;
|
|
u_int8_t mode = mode0 & 0xff;
|
|
u_int len;
|
|
|
|
p = (struct sadb_x_sa2 *)buf;
|
|
len = sizeof(struct sadb_x_sa2);
|
|
|
|
if (buf + len > lim)
|
|
return NULL;
|
|
|
|
memset(p, 0, len);
|
|
p->sadb_x_sa2_len = PFKEY_UNIT64(len);
|
|
p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
|
|
p->sadb_x_sa2_mode = mode;
|
|
p->sadb_x_sa2_reqid = reqid;
|
|
|
|
return(buf + len);
|
|
}
|