+++ /dev/null
-/* $Id: ipsec_dump_policy.c,v 1.7 2004/10/29 16:37:03 ludvigm Exp $ */
-
-/*
- * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the project nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#ifdef HAVE_NETINET6_IPSEC
-# include <netinet6/ipsec.h>
-#else
-# include <netinet/ipsec.h>
-#endif
-
-#include <arpa/inet.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <netdb.h>
-
-#include "ipsec_strerror.h"
-#include "libpfkey.h"
-
-static const char *ipsp_dir_strs[] = {
- "any", "in", "out", "fwd"
-};
-
-static const char *ipsp_policy_strs[] = {
- "discard", "none", "ipsec", "entrust", "bypass",
-};
-
-static char *ipsec_dump_ipsecrequest __P((char *, size_t,
- struct sadb_x_ipsecrequest *, size_t));
-static int set_addresses __P((char *, size_t, struct sockaddr *,
- struct sockaddr *));
-static char *set_address __P((char *, size_t, struct sockaddr *));
-
-/*
- * policy is sadb_x_policy buffer.
- * Must call free() later.
- * When delimiter == NULL, alternatively ' '(space) is applied.
- */
-char *
-ipsec_dump_policy(policy, delimiter)
- caddr_t policy;
- char *delimiter;
-{
- struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy;
- struct sadb_x_ipsecrequest *xisr;
- size_t off, buflen;
- char *buf;
- char isrbuf[1024];
- char *newbuf;
-
-#ifdef HAVE_PFKEY_POLICY_PRIORITY
- int32_t priority_offset;
- char *priority_str;
- char operator;
-#endif
-
- /* sanity check */
- if (policy == NULL)
- return NULL;
- if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
- __ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
- return NULL;
- }
-
- /* set delimiter */
- if (delimiter == NULL)
- delimiter = " ";
-
-#ifdef HAVE_PFKEY_POLICY_PRIORITY
- if (xpl->sadb_x_policy_priority == 0)
- {
- priority_offset = 0;
- priority_str = "";
- }
- /* find which constant the priority is closest to */
- else if (xpl->sadb_x_policy_priority <
- (u_int32_t) (PRIORITY_DEFAULT / 4) * 3)
- {
- priority_offset = xpl->sadb_x_policy_priority - PRIORITY_HIGH;
- priority_str = "prio high";
- }
- else if (xpl->sadb_x_policy_priority >=
- (u_int32_t) (PRIORITY_DEFAULT / 4) * 3 &&
- xpl->sadb_x_policy_priority <
- (u_int32_t) (PRIORITY_DEFAULT / 4) * 5)
- {
- priority_offset = xpl->sadb_x_policy_priority - PRIORITY_DEFAULT;
- priority_str = "prio def";
- }
- else
- {
- priority_offset = xpl->sadb_x_policy_priority - PRIORITY_LOW;
- priority_str = "prio low";
- }
-
- /* fix sign to match the way it is input */
- priority_offset *= -1;
- if (priority_offset < 0)
- {
- operator = '-';
- priority_offset *= -1;
- }
- else
- {
- operator = '+';
- }
-#endif
-
- switch (xpl->sadb_x_policy_dir) {
- case IPSEC_DIR_ANY:
- case IPSEC_DIR_INBOUND:
- case IPSEC_DIR_OUTBOUND:
-#ifdef HAVE_POLICY_FWD
- case IPSEC_DIR_FWD:
-#endif
- break;
- default:
- __ipsec_errcode = EIPSEC_INVAL_DIR;
- return NULL;
- }
-
- switch (xpl->sadb_x_policy_type) {
- case IPSEC_POLICY_DISCARD:
- case IPSEC_POLICY_NONE:
- case IPSEC_POLICY_IPSEC:
- case IPSEC_POLICY_BYPASS:
- case IPSEC_POLICY_ENTRUST:
- break;
- default:
- __ipsec_errcode = EIPSEC_INVAL_POLICY;
- return NULL;
- }
-
- buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
- + 1 /* space */
-#ifdef HAVE_PFKEY_POLICY_PRIORITY
- + strlen(priority_str)
- + ((priority_offset != 0) ? 13 : 0) /* [space operator space int] */
- + ((strlen(priority_str) != 0) ? 1 : 0) /* space */
-#endif
- + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
- + 1; /* NUL */
-
- if ((buf = malloc(buflen)) == NULL) {
- __ipsec_errcode = EIPSEC_NO_BUFS;
- return NULL;
- }
-#ifdef HAVE_PFKEY_POLICY_PRIORITY
- if (priority_offset != 0)
- {
- snprintf(buf, buflen, "%s %s %c %u %s",
- ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str, operator,
- priority_offset, ipsp_policy_strs[xpl->sadb_x_policy_type]);
- }
- else if (strlen (priority_str) != 0)
- {
- snprintf(buf, buflen, "%s %s %s",
- ipsp_dir_strs[xpl->sadb_x_policy_dir], priority_str,
- ipsp_policy_strs[xpl->sadb_x_policy_type]);
- }
- else
- {
- snprintf(buf, buflen, "%s %s",
- ipsp_dir_strs[xpl->sadb_x_policy_dir],
- ipsp_policy_strs[xpl->sadb_x_policy_type]);
- }
-#else
- snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
- ipsp_policy_strs[xpl->sadb_x_policy_type]);
-#endif
-
- if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
- __ipsec_errcode = EIPSEC_NO_ERROR;
- return buf;
- }
-
- /* count length of buffer for use */
- off = sizeof(*xpl);
- while (off < PFKEY_EXTLEN(xpl)) {
- xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
- off += xisr->sadb_x_ipsecrequest_len;
- }
-
- /* validity check */
- if (off != PFKEY_EXTLEN(xpl)) {
- __ipsec_errcode = EIPSEC_INVAL_SADBMSG;
- free(buf);
- return NULL;
- }
-
- off = sizeof(*xpl);
- while (off < PFKEY_EXTLEN(xpl)) {
- int offset;
- xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
-
- if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
- PFKEY_EXTLEN(xpl) - off) == NULL) {
- free(buf);
- return NULL;
- }
-
- offset = strlen(buf);
- buflen = offset + strlen(delimiter) + strlen(isrbuf) + 1;
- newbuf = (char *)realloc(buf, buflen);
- if (newbuf == NULL) {
- __ipsec_errcode = EIPSEC_NO_BUFS;
- free(buf);
- return NULL;
- }
- buf = newbuf;
- snprintf(buf+offset, buflen-offset, "%s%s", delimiter, isrbuf);
-
- off += xisr->sadb_x_ipsecrequest_len;
- }
-
- __ipsec_errcode = EIPSEC_NO_ERROR;
- return buf;
-}
-
-static char *
-ipsec_dump_ipsecrequest(buf, len, xisr, bound)
- char *buf;
- size_t len;
- struct sadb_x_ipsecrequest *xisr;
- size_t bound; /* boundary */
-{
- const char *proto, *mode, *level;
- char abuf[NI_MAXHOST * 2 + 2];
-
- if (xisr->sadb_x_ipsecrequest_len > bound) {
- __ipsec_errcode = EIPSEC_INVAL_PROTO;
- return NULL;
- }
-
- switch (xisr->sadb_x_ipsecrequest_proto) {
- case IPPROTO_ESP:
- proto = "esp";
- break;
- case IPPROTO_AH:
- proto = "ah";
- break;
- case IPPROTO_IPCOMP:
- proto = "ipcomp";
- break;
- default:
- __ipsec_errcode = EIPSEC_INVAL_PROTO;
- return NULL;
- }
-
- switch (xisr->sadb_x_ipsecrequest_mode) {
- case IPSEC_MODE_ANY:
- mode = "any";
- break;
- case IPSEC_MODE_TRANSPORT:
- mode = "transport";
- break;
- case IPSEC_MODE_TUNNEL:
- mode = "tunnel";
- break;
- default:
- __ipsec_errcode = EIPSEC_INVAL_MODE;
- return NULL;
- }
-
- abuf[0] = '\0';
- if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
- struct sockaddr *sa1, *sa2;
- caddr_t p;
-
- p = (caddr_t)(xisr + 1);
- sa1 = (struct sockaddr *)p;
- sa2 = (struct sockaddr *)(p + sysdep_sa_len(sa1));
- if (sizeof(*xisr) + sysdep_sa_len(sa1) + sysdep_sa_len(sa2) !=
- xisr->sadb_x_ipsecrequest_len) {
- __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
- return NULL;
- }
- if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) {
- __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
- return NULL;
- }
- }
-
- switch (xisr->sadb_x_ipsecrequest_level) {
- case IPSEC_LEVEL_DEFAULT:
- level = "default";
- break;
- case IPSEC_LEVEL_USE:
- level = "use";
- break;
- case IPSEC_LEVEL_REQUIRE:
- level = "require";
- break;
- case IPSEC_LEVEL_UNIQUE:
- level = "unique";
- break;
- default:
- __ipsec_errcode = EIPSEC_INVAL_LEVEL;
- return NULL;
- }
-
- if (xisr->sadb_x_ipsecrequest_reqid == 0)
- snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
- else {
- int ch;
-
- if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
- ch = '#';
- else
- ch = ':';
- snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
- ch, xisr->sadb_x_ipsecrequest_reqid);
- }
-
- return buf;
-}
-
-static int
-set_addresses(buf, len, sa1, sa2)
- char *buf;
- size_t len;
- struct sockaddr *sa1;
- struct sockaddr *sa2;
-{
- char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
-
- if (set_address(tmp1, sizeof(tmp1), sa1) == NULL ||
- set_address(tmp2, sizeof(tmp2), sa2) == NULL)
- return -1;
- if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
- return -1;
- snprintf(buf, len, "%s-%s", tmp1, tmp2);
- return 0;
-}
-
-static char *
-set_address(buf, len, sa)
- char *buf;
- size_t len;
- struct sockaddr *sa;
-{
- const int niflags = NI_NUMERICHOST;
-
- if (len < 1)
- return NULL;
- buf[0] = '\0';
- if (getnameinfo(sa, sysdep_sa_len(sa), buf, len, NULL, 0, niflags) != 0)
- return NULL;
- return buf;
-}
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