1 /* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include <sys/types.h>
38 #include <sys/param.h>
39 #include <sys/socket.h>
40
41 #include <netipsec/key_var.h>
42 #include <netinet/in.h>
43 #include <netipsec/ipsec.h>
44
45 #include <arpa/inet.h>
46
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <netdb.h>
51
52 #include "ipsec_strerror.h"
53
54 static const char *ipsp_dir_strs[] = {
55 "any", "in", "out",
56 };
57
58 static const char *ipsp_policy_strs[] = {
59 "discard", "none", "ipsec", "entrust", "bypass",
60 };
61
62 static char *ipsec_dump_ipsecrequest(char *, size_t,
63 struct sadb_x_ipsecrequest *, size_t);
64 static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *);
65 static char *set_address(char *, size_t, struct sockaddr *);
66
67 /*
68 * policy is sadb_x_policy buffer.
69 * Must call free() later.
70 * When delimiter == NULL, alternatively ' '(space) is applied.
71 */
72 char *
ipsec_dump_policy(policy,delimiter)73 ipsec_dump_policy(policy, delimiter)
74 caddr_t policy;
75 char *delimiter;
76 {
77 struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy;
78 struct sadb_x_ipsecrequest *xisr;
79 size_t off, buflen;
80 char *buf;
81 char isrbuf[1024];
82 char *newbuf;
83
84 /* sanity check */
85 if (policy == NULL)
86 return NULL;
87 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
88 __ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
89 return NULL;
90 }
91
92 /* set delimiter */
93 if (delimiter == NULL)
94 delimiter = " ";
95
96 switch (xpl->sadb_x_policy_dir) {
97 case IPSEC_DIR_ANY:
98 case IPSEC_DIR_INBOUND:
99 case IPSEC_DIR_OUTBOUND:
100 break;
101 default:
102 __ipsec_errcode = EIPSEC_INVAL_DIR;
103 return NULL;
104 }
105
106 switch (xpl->sadb_x_policy_type) {
107 case IPSEC_POLICY_DISCARD:
108 case IPSEC_POLICY_NONE:
109 case IPSEC_POLICY_IPSEC:
110 case IPSEC_POLICY_BYPASS:
111 case IPSEC_POLICY_ENTRUST:
112 break;
113 default:
114 __ipsec_errcode = EIPSEC_INVAL_POLICY;
115 return NULL;
116 }
117
118 buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
119 + 1 /* space */
120 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
121 + 1; /* NUL */
122
123 if ((buf = malloc(buflen)) == NULL) {
124 __ipsec_errcode = EIPSEC_NO_BUFS;
125 return NULL;
126 }
127 snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
128 ipsp_policy_strs[xpl->sadb_x_policy_type]);
129
130 if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
131 __ipsec_errcode = EIPSEC_NO_ERROR;
132 return buf;
133 }
134
135 /* count length of buffer for use */
136 off = sizeof(*xpl);
137 while (off < PFKEY_EXTLEN(xpl)) {
138 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
139 off += xisr->sadb_x_ipsecrequest_len;
140 }
141
142 /* validity check */
143 if (off != PFKEY_EXTLEN(xpl)) {
144 __ipsec_errcode = EIPSEC_INVAL_SADBMSG;
145 free(buf);
146 return NULL;
147 }
148
149 off = sizeof(*xpl);
150 while (off < PFKEY_EXTLEN(xpl)) {
151 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
152
153 if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
154 PFKEY_EXTLEN(xpl) - off) == NULL) {
155 free(buf);
156 return NULL;
157 }
158
159 buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1;
160 newbuf = (char *)realloc(buf, buflen);
161 if (newbuf == NULL) {
162 __ipsec_errcode = EIPSEC_NO_BUFS;
163 free(buf);
164 return NULL;
165 }
166 buf = newbuf;
167 snprintf(buf + strlen(buf), buflen - strlen(buf),
168 "%s%s", delimiter, isrbuf);
169
170 off += xisr->sadb_x_ipsecrequest_len;
171 }
172
173 __ipsec_errcode = EIPSEC_NO_ERROR;
174 return buf;
175 }
176
177 static char *
ipsec_dump_ipsecrequest(buf,len,xisr,bound)178 ipsec_dump_ipsecrequest(buf, len, xisr, bound)
179 char *buf;
180 size_t len;
181 struct sadb_x_ipsecrequest *xisr;
182 size_t bound; /* boundary */
183 {
184 const char *proto, *mode, *level;
185 char abuf[NI_MAXHOST * 2 + 2];
186
187 if (xisr->sadb_x_ipsecrequest_len > bound) {
188 __ipsec_errcode = EIPSEC_INVAL_PROTO;
189 return NULL;
190 }
191
192 switch (xisr->sadb_x_ipsecrequest_proto) {
193 case IPPROTO_ESP:
194 proto = "esp";
195 break;
196 case IPPROTO_AH:
197 proto = "ah";
198 break;
199 case IPPROTO_IPCOMP:
200 proto = "ipcomp";
201 break;
202 case IPPROTO_TCP:
203 proto = "tcp";
204 break;
205 default:
206 __ipsec_errcode = EIPSEC_INVAL_PROTO;
207 return NULL;
208 }
209
210 switch (xisr->sadb_x_ipsecrequest_mode) {
211 case IPSEC_MODE_ANY:
212 mode = "any";
213 break;
214 case IPSEC_MODE_TRANSPORT:
215 mode = "transport";
216 break;
217 case IPSEC_MODE_TUNNEL:
218 mode = "tunnel";
219 break;
220 default:
221 __ipsec_errcode = EIPSEC_INVAL_MODE;
222 return NULL;
223 }
224
225 abuf[0] = '\0';
226 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
227 struct sockaddr *sa1, *sa2;
228 caddr_t p;
229
230 p = (caddr_t)(xisr + 1);
231 sa1 = (struct sockaddr *)p;
232 sa2 = (struct sockaddr *)(p + sa1->sa_len);
233 if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len !=
234 xisr->sadb_x_ipsecrequest_len) {
235 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
236 return NULL;
237 }
238 if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) {
239 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
240 return NULL;
241 }
242 }
243
244 switch (xisr->sadb_x_ipsecrequest_level) {
245 case IPSEC_LEVEL_DEFAULT:
246 level = "default";
247 break;
248 case IPSEC_LEVEL_USE:
249 level = "use";
250 break;
251 case IPSEC_LEVEL_REQUIRE:
252 level = "require";
253 break;
254 case IPSEC_LEVEL_UNIQUE:
255 level = "unique";
256 break;
257 default:
258 __ipsec_errcode = EIPSEC_INVAL_LEVEL;
259 return NULL;
260 }
261
262 if (xisr->sadb_x_ipsecrequest_reqid == 0)
263 snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
264 else {
265 int ch;
266
267 if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
268 ch = '#';
269 else
270 ch = ':';
271 snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
272 ch, xisr->sadb_x_ipsecrequest_reqid);
273 }
274
275 return buf;
276 }
277
278 static int
set_addresses(buf,len,sa1,sa2)279 set_addresses(buf, len, sa1, sa2)
280 char *buf;
281 size_t len;
282 struct sockaddr *sa1;
283 struct sockaddr *sa2;
284 {
285 char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
286
287 if (set_address(tmp1, sizeof(tmp1), sa1) == NULL ||
288 set_address(tmp2, sizeof(tmp2), sa2) == NULL)
289 return -1;
290 if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
291 return -1;
292 snprintf(buf, len, "%s-%s", tmp1, tmp2);
293 return 0;
294 }
295
296 static char *
set_address(buf,len,sa)297 set_address(buf, len, sa)
298 char *buf;
299 size_t len;
300 struct sockaddr *sa;
301 {
302 const int niflags = NI_NUMERICHOST;
303
304 if (len < 1)
305 return NULL;
306 buf[0] = '\0';
307 if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0)
308 return NULL;
309 return buf;
310 }
311