--- /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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