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- /* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */
- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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.
- */
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/socket.h>
- #include <netipsec/key_var.h>
- #include <netinet/in.h>
- #include <netipsec/ipsec.h>
- #include <arpa/inet.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <netdb.h>
- #include "ipsec_strerror.h"
- static const char *ipsp_dir_strs[] = {
- "any", "in", "out",
- };
- static const char *ipsp_policy_strs[] = {
- "discard", "none", "ipsec", "entrust", "bypass",
- };
- static char *ipsec_dump_ipsecrequest(char *, size_t,
- struct sadb_x_ipsecrequest *, size_t);
- static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *);
- static char *set_address(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(c_caddr_t policy, const char *delimiter)
- {
- const struct sadb_x_policy *xpl = (const struct sadb_x_policy *)policy;
- struct sadb_x_ipsecrequest *xisr;
- size_t off, buflen;
- char *buf;
- char isrbuf[1024];
- char *newbuf;
- /* 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 = " ";
- switch (xpl->sadb_x_policy_dir) {
- case IPSEC_DIR_ANY:
- case IPSEC_DIR_INBOUND:
- case IPSEC_DIR_OUTBOUND:
- 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 */
- + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
- + 1; /* NUL */
- if ((buf = malloc(buflen)) == NULL) {
- __ipsec_errcode = EIPSEC_NO_BUFS;
- return NULL;
- }
- snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
- ipsp_policy_strs[xpl->sadb_x_policy_type]);
- 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)) {
- 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;
- }
- buflen = strlen(buf) + 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 + strlen(buf), buflen - strlen(buf),
- "%s%s", delimiter, isrbuf);
- off += xisr->sadb_x_ipsecrequest_len;
- }
- __ipsec_errcode = EIPSEC_NO_ERROR;
- return buf;
- }
- static char *
- ipsec_dump_ipsecrequest(char *buf, size_t len, struct sadb_x_ipsecrequest *xisr,
- size_t bound)
- {
- 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;
- case IPPROTO_TCP:
- proto = "tcp";
- 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 + sa1->sa_len);
- if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len !=
- 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(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(char *buf, size_t len, struct sockaddr *sa)
- {
- const int niflags = NI_NUMERICHOST;
- if (len < 1)
- return NULL;
- buf[0] = '\0';
- if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0)
- return NULL;
- return buf;
- }
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