/* $NetBSD: ipsec_dump_policy.c,v 1.7.6.1 2007/08/01 11:52:17 vanhu Exp $ */
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/* Id: ipsec_dump_policy.c,v 1.10 2005/06/29 09:12:37 manubsd 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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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 <netinet/in.h>
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#include PATH_IPSEC_H
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netdb.h>
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#include "ipsec_strerror.h"
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#include "libpfkey.h"
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static const char *ipsp_dir_strs[] = {
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"any", "in", "out", "fwd"
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};
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static const char *ipsp_policy_strs[] = {
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"discard", "none", "ipsec", "entrust", "bypass",
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};
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static char *ipsec_dump_ipsecrequest __P((char *, size_t,
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struct sadb_x_ipsecrequest *, size_t, int));
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static char *ipsec_dump_policy1 __P((void *, const char *, int));
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static int set_addresses __P((char *, size_t, struct sockaddr *,
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struct sockaddr *, int));
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static char *set_address __P((char *, size_t, struct sockaddr *, int));
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/*
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* policy is sadb_x_policy buffer.
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* Must call free() later.
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* When delimiter == NULL, alternatively ' '(space) is applied.
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*/
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char *
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ipsec_dump_policy(policy, delimiter)
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ipsec_policy_t policy;
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__ipsec_const char *delimiter;
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{
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return ipsec_dump_policy1(policy, delimiter, 0);
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}
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char *
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ipsec_dump_policy_withports(policy, delimiter)
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void *policy;
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const char *delimiter;
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{
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return ipsec_dump_policy1(policy, delimiter, 1);
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}
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static char *
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ipsec_dump_policy1(policy, delimiter, withports)
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void *policy;
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const char *delimiter;
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int withports;
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{
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struct sadb_x_policy *xpl = policy;
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struct sadb_x_ipsecrequest *xisr;
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size_t off, buflen;
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char *buf;
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char isrbuf[1024];
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char *newbuf;
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#ifdef HAVE_PFKEY_POLICY_PRIORITY
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int32_t priority_offset;
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char *priority_str;
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char operator;
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#endif
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/* sanity check */
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if (policy == NULL)
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return NULL;
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if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
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__ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
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return NULL;
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}
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/* set delimiter */
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if (delimiter == NULL)
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delimiter = " ";
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#ifdef HAVE_PFKEY_POLICY_PRIORITY
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if (xpl->sadb_x_policy_priority == 0)
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{
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priority_offset = 0;
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priority_str = "";
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}
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/* find which constant the priority is closest to */
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else if (xpl->sadb_x_policy_priority <
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(u_int32_t) (PRIORITY_DEFAULT / 4) * 3)
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{
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priority_offset = xpl->sadb_x_policy_priority - PRIORITY_HIGH;
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priority_str = "prio high";
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}
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else if (xpl->sadb_x_policy_priority >=
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(u_int32_t) (PRIORITY_DEFAULT / 4) * 3 &&
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xpl->sadb_x_policy_priority <
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(u_int32_t) (PRIORITY_DEFAULT / 4) * 5)
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{
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priority_offset = xpl->sadb_x_policy_priority - PRIORITY_DEFAULT;
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priority_str = "prio def";
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}
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else
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{
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priority_offset = xpl->sadb_x_policy_priority - PRIORITY_LOW;
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priority_str = "prio low";
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}
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/* fix sign to match the way it is input */
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priority_offset *= -1;
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if (priority_offset < 0)
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{
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operator = '-';
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priority_offset *= -1;
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}
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else
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{
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operator = '+';
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}
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#endif
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switch (xpl->sadb_x_policy_dir) {
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case IPSEC_DIR_ANY:
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case IPSEC_DIR_INBOUND:
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case IPSEC_DIR_OUTBOUND:
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#ifdef HAVE_POLICY_FWD
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case IPSEC_DIR_FWD:
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#endif
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_DIR;
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return NULL;
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}
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switch (xpl->sadb_x_policy_type) {
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case IPSEC_POLICY_DISCARD:
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case IPSEC_POLICY_NONE:
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case IPSEC_POLICY_IPSEC:
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case IPSEC_POLICY_BYPASS:
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case IPSEC_POLICY_ENTRUST:
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_POLICY;
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return NULL;
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}
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buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
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+ 1 /* space */
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#ifdef HAVE_PFKEY_POLICY_PRIORITY
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+ strlen(priority_str)
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+ ((priority_offset != 0) ? 13 : 0) /* [space operator space int] */
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+ ((strlen(priority_str) != 0) ? 1 : 0) /* space */
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#endif
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+ strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
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+ 1; /* NUL */
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if ((buf = malloc(buflen)) == NULL) {
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__ipsec_errcode = EIPSEC_NO_BUFS;
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return NULL;
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}
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#ifdef HAVE_PFKEY_POLICY_PRIORITY
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if (priority_offset != 0)
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{
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snprintf(buf, buflen, "%s %s %c %u %s",
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ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str, operator,
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priority_offset, ipsp_policy_strs[xpl->sadb_x_policy_type]);
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}
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else if (strlen (priority_str) != 0)
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{
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snprintf(buf, buflen, "%s %s %s",
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ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str,
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ipsp_policy_strs[xpl->sadb_x_policy_type]);
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}
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else
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{
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snprintf(buf, buflen, "%s %s",
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ipsp_dir_strs[xpl->sadb_x_policy_dir],
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ipsp_policy_strs[xpl->sadb_x_policy_type]);
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}
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#else
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snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
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ipsp_policy_strs[xpl->sadb_x_policy_type]);
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#endif
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if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
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__ipsec_errcode = EIPSEC_NO_ERROR;
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return buf;
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}
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/* count length of buffer for use */
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off = sizeof(*xpl);
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while (off < PFKEY_EXTLEN(xpl)) {
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xisr = (void *)((caddr_t)(void *)xpl + off);
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off += xisr->sadb_x_ipsecrequest_len;
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}
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/* validity check */
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if (off != PFKEY_EXTLEN(xpl)) {
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__ipsec_errcode = EIPSEC_INVAL_SADBMSG;
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free(buf);
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return NULL;
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}
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off = sizeof(*xpl);
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while (off < PFKEY_EXTLEN(xpl)) {
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int offset;
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xisr = (void *)((caddr_t)(void *)xpl + off);
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if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
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PFKEY_EXTLEN(xpl) - off, withports) == NULL) {
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free(buf);
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return NULL;
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}
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offset = strlen(buf);
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buflen = offset + strlen(delimiter) + strlen(isrbuf) + 1;
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newbuf = (char *)realloc(buf, buflen);
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if (newbuf == NULL) {
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__ipsec_errcode = EIPSEC_NO_BUFS;
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free(buf);
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return NULL;
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}
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buf = newbuf;
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snprintf(buf+offset, buflen-offset, "%s%s", delimiter, isrbuf);
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off += xisr->sadb_x_ipsecrequest_len;
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}
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__ipsec_errcode = EIPSEC_NO_ERROR;
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return buf;
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}
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static char *
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ipsec_dump_ipsecrequest(buf, len, xisr, bound, withports)
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char *buf;
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size_t len;
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struct sadb_x_ipsecrequest *xisr;
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size_t bound; /* boundary */
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int withports;
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{
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const char *proto, *mode, *level;
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char abuf[NI_MAXHOST * 2 + 2];
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if (xisr->sadb_x_ipsecrequest_len > bound) {
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__ipsec_errcode = EIPSEC_INVAL_PROTO;
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return NULL;
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}
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switch (xisr->sadb_x_ipsecrequest_proto) {
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case IPPROTO_ESP:
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proto = "esp";
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break;
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case IPPROTO_AH:
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proto = "ah";
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break;
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case IPPROTO_IPCOMP:
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proto = "ipcomp";
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_PROTO;
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return NULL;
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}
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switch (xisr->sadb_x_ipsecrequest_mode) {
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case IPSEC_MODE_ANY:
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mode = "any";
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break;
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case IPSEC_MODE_TRANSPORT:
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mode = "transport";
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break;
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case IPSEC_MODE_TUNNEL:
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mode = "tunnel";
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_MODE;
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return NULL;
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}
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abuf[0] = '\0';
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if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
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struct sockaddr *sa1, *sa2;
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caddr_t p;
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p = (void *)(xisr + 1);
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sa1 = (void *)p;
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sa2 = (void *)(p + sysdep_sa_len(sa1));
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if (sizeof(*xisr) + sysdep_sa_len(sa1) + sysdep_sa_len(sa2) !=
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xisr->sadb_x_ipsecrequest_len) {
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__ipsec_errcode = EIPSEC_INVAL_ADDRESS;
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return NULL;
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}
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if (set_addresses(abuf, sizeof(abuf),
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sa1, sa2, withports) != 0) {
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__ipsec_errcode = EIPSEC_INVAL_ADDRESS;
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return NULL;
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}
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}
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switch (xisr->sadb_x_ipsecrequest_level) {
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case IPSEC_LEVEL_DEFAULT:
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level = "default";
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break;
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case IPSEC_LEVEL_USE:
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level = "use";
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break;
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case IPSEC_LEVEL_REQUIRE:
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level = "require";
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break;
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case IPSEC_LEVEL_UNIQUE:
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level = "unique";
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break;
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default:
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__ipsec_errcode = EIPSEC_INVAL_LEVEL;
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return NULL;
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}
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if (xisr->sadb_x_ipsecrequest_reqid == 0)
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snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
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else {
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int ch;
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if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
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ch = '#';
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else
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ch = ':';
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snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
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ch, xisr->sadb_x_ipsecrequest_reqid);
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}
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return buf;
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}
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static int
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set_addresses(buf, len, sa1, sa2, withports)
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char *buf;
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size_t len;
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struct sockaddr *sa1;
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struct sockaddr *sa2;
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int withports;
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{
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char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
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if (set_address(tmp1, sizeof(tmp1), sa1, withports) == NULL ||
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set_address(tmp2, sizeof(tmp2), sa2, withports) == NULL)
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return -1;
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if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
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return -1;
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snprintf(buf, len, "%s-%s", tmp1, tmp2);
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return 0;
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}
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static char *
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set_address(buf, len, sa, withports)
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char *buf;
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size_t len;
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struct sockaddr *sa;
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int withports;
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{
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const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
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char host[NI_MAXHOST];
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char serv[NI_MAXSERV];
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if (len < 1)
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return NULL;
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buf[0] = '\0';
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if (getnameinfo(sa, (socklen_t)sysdep_sa_len(sa), host, sizeof(host),
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serv, sizeof(serv), niflags) != 0)
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return NULL;
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if (withports)
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snprintf(buf, len, "%s[%s]", host, serv);
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else
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snprintf(buf, len, "%s", host);
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return buf;
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}
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