1 /* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: stable/10/lib/libipsec/ipsec_dump_policy.c 264870 2014-04-24 10:23:35Z brueffer $");
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/socket.h>
38
39 #include <netipsec/key_var.h>
40 #include <netinet/in.h>
41 #include <netipsec/ipsec.h>
42
43 #include <arpa/inet.h>
44
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <netdb.h>
49
50 #include "ipsec_strerror.h"
51
52 static const char *ipsp_dir_strs[] = {
53 "any", "in", "out",
54 };
55
56 static const char *ipsp_policy_strs[] = {
57 "discard", "none", "ipsec", "entrust", "bypass",
58 };
59
60 static char *ipsec_dump_ipsecrequest(char *, size_t,
61 struct sadb_x_ipsecrequest *, size_t);
62 static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *);
63 static char *set_address(char *, size_t, struct sockaddr *);
64
65 /*
66 * policy is sadb_x_policy buffer.
67 * Must call free() later.
68 * When delimiter == NULL, alternatively ' '(space) is applied.
69 */
70 char *
ipsec_dump_policy(policy,delimiter)71 ipsec_dump_policy(policy, delimiter)
72 caddr_t policy;
73 char *delimiter;
74 {
75 struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy;
76 struct sadb_x_ipsecrequest *xisr;
77 size_t off, buflen;
78 char *buf;
79 char isrbuf[1024];
80 char *newbuf;
81
82 /* sanity check */
83 if (policy == NULL)
84 return NULL;
85 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
86 __ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
87 return NULL;
88 }
89
90 /* set delimiter */
91 if (delimiter == NULL)
92 delimiter = " ";
93
94 switch (xpl->sadb_x_policy_dir) {
95 case IPSEC_DIR_ANY:
96 case IPSEC_DIR_INBOUND:
97 case IPSEC_DIR_OUTBOUND:
98 break;
99 default:
100 __ipsec_errcode = EIPSEC_INVAL_DIR;
101 return NULL;
102 }
103
104 switch (xpl->sadb_x_policy_type) {
105 case IPSEC_POLICY_DISCARD:
106 case IPSEC_POLICY_NONE:
107 case IPSEC_POLICY_IPSEC:
108 case IPSEC_POLICY_BYPASS:
109 case IPSEC_POLICY_ENTRUST:
110 break;
111 default:
112 __ipsec_errcode = EIPSEC_INVAL_POLICY;
113 return NULL;
114 }
115
116 buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
117 + 1 /* space */
118 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
119 + 1; /* NUL */
120
121 if ((buf = malloc(buflen)) == NULL) {
122 __ipsec_errcode = EIPSEC_NO_BUFS;
123 return NULL;
124 }
125 snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
126 ipsp_policy_strs[xpl->sadb_x_policy_type]);
127
128 if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
129 __ipsec_errcode = EIPSEC_NO_ERROR;
130 return buf;
131 }
132
133 /* count length of buffer for use */
134 off = sizeof(*xpl);
135 while (off < PFKEY_EXTLEN(xpl)) {
136 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
137 off += xisr->sadb_x_ipsecrequest_len;
138 }
139
140 /* validity check */
141 if (off != PFKEY_EXTLEN(xpl)) {
142 __ipsec_errcode = EIPSEC_INVAL_SADBMSG;
143 free(buf);
144 return NULL;
145 }
146
147 off = sizeof(*xpl);
148 while (off < PFKEY_EXTLEN(xpl)) {
149 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
150
151 if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
152 PFKEY_EXTLEN(xpl) - off) == NULL) {
153 free(buf);
154 return NULL;
155 }
156
157 buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1;
158 newbuf = (char *)realloc(buf, buflen);
159 if (newbuf == NULL) {
160 __ipsec_errcode = EIPSEC_NO_BUFS;
161 free(buf);
162 return NULL;
163 }
164 buf = newbuf;
165 snprintf(buf + strlen(buf), buflen - strlen(buf),
166 "%s%s", delimiter, isrbuf);
167
168 off += xisr->sadb_x_ipsecrequest_len;
169 }
170
171 __ipsec_errcode = EIPSEC_NO_ERROR;
172 return buf;
173 }
174
175 static char *
ipsec_dump_ipsecrequest(buf,len,xisr,bound)176 ipsec_dump_ipsecrequest(buf, len, xisr, bound)
177 char *buf;
178 size_t len;
179 struct sadb_x_ipsecrequest *xisr;
180 size_t bound; /* boundary */
181 {
182 const char *proto, *mode, *level;
183 char abuf[NI_MAXHOST * 2 + 2];
184
185 if (xisr->sadb_x_ipsecrequest_len > bound) {
186 __ipsec_errcode = EIPSEC_INVAL_PROTO;
187 return NULL;
188 }
189
190 switch (xisr->sadb_x_ipsecrequest_proto) {
191 case IPPROTO_ESP:
192 proto = "esp";
193 break;
194 case IPPROTO_AH:
195 proto = "ah";
196 break;
197 case IPPROTO_IPCOMP:
198 proto = "ipcomp";
199 break;
200 case IPPROTO_TCP:
201 proto = "tcp";
202 break;
203 default:
204 __ipsec_errcode = EIPSEC_INVAL_PROTO;
205 return NULL;
206 }
207
208 switch (xisr->sadb_x_ipsecrequest_mode) {
209 case IPSEC_MODE_ANY:
210 mode = "any";
211 break;
212 case IPSEC_MODE_TRANSPORT:
213 mode = "transport";
214 break;
215 case IPSEC_MODE_TUNNEL:
216 mode = "tunnel";
217 break;
218 default:
219 __ipsec_errcode = EIPSEC_INVAL_MODE;
220 return NULL;
221 }
222
223 abuf[0] = '\0';
224 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
225 struct sockaddr *sa1, *sa2;
226 caddr_t p;
227
228 p = (caddr_t)(xisr + 1);
229 sa1 = (struct sockaddr *)p;
230 sa2 = (struct sockaddr *)(p + sa1->sa_len);
231 if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len !=
232 xisr->sadb_x_ipsecrequest_len) {
233 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
234 return NULL;
235 }
236 if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) {
237 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
238 return NULL;
239 }
240 }
241
242 switch (xisr->sadb_x_ipsecrequest_level) {
243 case IPSEC_LEVEL_DEFAULT:
244 level = "default";
245 break;
246 case IPSEC_LEVEL_USE:
247 level = "use";
248 break;
249 case IPSEC_LEVEL_REQUIRE:
250 level = "require";
251 break;
252 case IPSEC_LEVEL_UNIQUE:
253 level = "unique";
254 break;
255 default:
256 __ipsec_errcode = EIPSEC_INVAL_LEVEL;
257 return NULL;
258 }
259
260 if (xisr->sadb_x_ipsecrequest_reqid == 0)
261 snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
262 else {
263 int ch;
264
265 if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
266 ch = '#';
267 else
268 ch = ':';
269 snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
270 ch, xisr->sadb_x_ipsecrequest_reqid);
271 }
272
273 return buf;
274 }
275
276 static int
set_addresses(buf,len,sa1,sa2)277 set_addresses(buf, len, sa1, sa2)
278 char *buf;
279 size_t len;
280 struct sockaddr *sa1;
281 struct sockaddr *sa2;
282 {
283 char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
284
285 if (set_address(tmp1, sizeof(tmp1), sa1) == NULL ||
286 set_address(tmp2, sizeof(tmp2), sa2) == NULL)
287 return -1;
288 if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
289 return -1;
290 snprintf(buf, len, "%s-%s", tmp1, tmp2);
291 return 0;
292 }
293
294 static char *
set_address(buf,len,sa)295 set_address(buf, len, sa)
296 char *buf;
297 size_t len;
298 struct sockaddr *sa;
299 {
300 const int niflags = NI_NUMERICHOST;
301
302 if (len < 1)
303 return NULL;
304 buf[0] = '\0';
305 if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0)
306 return NULL;
307 return buf;
308 }
309