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/types.h>
35 #include <sys/param.h>
36 #include <sys/socket.h>
37
38 #include <netipsec/key_var.h>
39 #include <netinet/in.h>
40 #include <netipsec/ipsec.h>
41
42 #include <arpa/inet.h>
43
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <netdb.h>
48
49 #include "ipsec_strerror.h"
50
51 static const char *ipsp_dir_strs[] = {
52 "any", "in", "out",
53 };
54
55 static const char *ipsp_policy_strs[] = {
56 "discard", "none", "ipsec", "entrust", "bypass",
57 };
58
59 static char *ipsec_dump_ipsecrequest(char *, size_t,
60 struct sadb_x_ipsecrequest *, size_t);
61 static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *);
62 static char *set_address(char *, size_t, struct sockaddr *);
63
64 /*
65 * policy is sadb_x_policy buffer.
66 * Must call free() later.
67 * When delimiter == NULL, alternatively ' '(space) is applied.
68 */
69 char *
ipsec_dump_policy(c_caddr_t policy,const char * delimiter)70 ipsec_dump_policy(c_caddr_t policy, const char *delimiter)
71 {
72 const struct sadb_x_policy *xpl = (const struct sadb_x_policy *)policy;
73 struct sadb_x_ipsecrequest *xisr;
74 size_t off, buflen;
75 char *buf;
76 char isrbuf[1024];
77 char *newbuf;
78
79 /* sanity check */
80 if (policy == NULL)
81 return NULL;
82 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
83 __ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
84 return NULL;
85 }
86
87 /* set delimiter */
88 if (delimiter == NULL)
89 delimiter = " ";
90
91 switch (xpl->sadb_x_policy_dir) {
92 case IPSEC_DIR_ANY:
93 case IPSEC_DIR_INBOUND:
94 case IPSEC_DIR_OUTBOUND:
95 break;
96 default:
97 __ipsec_errcode = EIPSEC_INVAL_DIR;
98 return NULL;
99 }
100
101 switch (xpl->sadb_x_policy_type) {
102 case IPSEC_POLICY_DISCARD:
103 case IPSEC_POLICY_NONE:
104 case IPSEC_POLICY_IPSEC:
105 case IPSEC_POLICY_BYPASS:
106 case IPSEC_POLICY_ENTRUST:
107 break;
108 default:
109 __ipsec_errcode = EIPSEC_INVAL_POLICY;
110 return NULL;
111 }
112
113 buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
114 + 1 /* space */
115 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
116 + 1; /* NUL */
117
118 if ((buf = malloc(buflen)) == NULL) {
119 __ipsec_errcode = EIPSEC_NO_BUFS;
120 return NULL;
121 }
122 snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir],
123 ipsp_policy_strs[xpl->sadb_x_policy_type]);
124
125 if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
126 __ipsec_errcode = EIPSEC_NO_ERROR;
127 return buf;
128 }
129
130 /* count length of buffer for use */
131 off = sizeof(*xpl);
132 while (off < PFKEY_EXTLEN(xpl)) {
133 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
134 off += xisr->sadb_x_ipsecrequest_len;
135 }
136
137 /* validity check */
138 if (off != PFKEY_EXTLEN(xpl)) {
139 __ipsec_errcode = EIPSEC_INVAL_SADBMSG;
140 free(buf);
141 return NULL;
142 }
143
144 off = sizeof(*xpl);
145 while (off < PFKEY_EXTLEN(xpl)) {
146 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off);
147
148 if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr,
149 PFKEY_EXTLEN(xpl) - off) == NULL) {
150 free(buf);
151 return NULL;
152 }
153
154 buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1;
155 newbuf = (char *)realloc(buf, buflen);
156 if (newbuf == NULL) {
157 __ipsec_errcode = EIPSEC_NO_BUFS;
158 free(buf);
159 return NULL;
160 }
161 buf = newbuf;
162 snprintf(buf + strlen(buf), buflen - strlen(buf),
163 "%s%s", delimiter, isrbuf);
164
165 off += xisr->sadb_x_ipsecrequest_len;
166 }
167
168 __ipsec_errcode = EIPSEC_NO_ERROR;
169 return buf;
170 }
171
172 static char *
ipsec_dump_ipsecrequest(char * buf,size_t len,struct sadb_x_ipsecrequest * xisr,size_t bound)173 ipsec_dump_ipsecrequest(char *buf, size_t len, struct sadb_x_ipsecrequest *xisr,
174 size_t bound)
175 {
176 const char *proto, *mode, *level;
177 char abuf[NI_MAXHOST * 2 + 2];
178
179 if (xisr->sadb_x_ipsecrequest_len > bound) {
180 __ipsec_errcode = EIPSEC_INVAL_PROTO;
181 return NULL;
182 }
183
184 switch (xisr->sadb_x_ipsecrequest_proto) {
185 case IPPROTO_ESP:
186 proto = "esp";
187 break;
188 case IPPROTO_AH:
189 proto = "ah";
190 break;
191 case IPPROTO_IPCOMP:
192 proto = "ipcomp";
193 break;
194 case IPPROTO_TCP:
195 proto = "tcp";
196 break;
197 default:
198 __ipsec_errcode = EIPSEC_INVAL_PROTO;
199 return NULL;
200 }
201
202 switch (xisr->sadb_x_ipsecrequest_mode) {
203 case IPSEC_MODE_ANY:
204 mode = "any";
205 break;
206 case IPSEC_MODE_TRANSPORT:
207 mode = "transport";
208 break;
209 case IPSEC_MODE_TUNNEL:
210 mode = "tunnel";
211 break;
212 default:
213 __ipsec_errcode = EIPSEC_INVAL_MODE;
214 return NULL;
215 }
216
217 abuf[0] = '\0';
218 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
219 struct sockaddr *sa1, *sa2;
220 caddr_t p;
221
222 p = (caddr_t)(xisr + 1);
223 sa1 = (struct sockaddr *)p;
224 sa2 = (struct sockaddr *)(p + sa1->sa_len);
225 if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len !=
226 xisr->sadb_x_ipsecrequest_len) {
227 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
228 return NULL;
229 }
230 if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) {
231 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
232 return NULL;
233 }
234 }
235
236 switch (xisr->sadb_x_ipsecrequest_level) {
237 case IPSEC_LEVEL_DEFAULT:
238 level = "default";
239 break;
240 case IPSEC_LEVEL_USE:
241 level = "use";
242 break;
243 case IPSEC_LEVEL_REQUIRE:
244 level = "require";
245 break;
246 case IPSEC_LEVEL_UNIQUE:
247 level = "unique";
248 break;
249 default:
250 __ipsec_errcode = EIPSEC_INVAL_LEVEL;
251 return NULL;
252 }
253
254 if (xisr->sadb_x_ipsecrequest_reqid == 0)
255 snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level);
256 else {
257 int ch;
258
259 if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX)
260 ch = '#';
261 else
262 ch = ':';
263 snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level,
264 ch, xisr->sadb_x_ipsecrequest_reqid);
265 }
266
267 return buf;
268 }
269
270 static int
set_addresses(char * buf,size_t len,struct sockaddr * sa1,struct sockaddr * sa2)271 set_addresses(char *buf, size_t len, struct sockaddr *sa1, struct sockaddr *sa2)
272 {
273 char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST];
274
275 if (set_address(tmp1, sizeof(tmp1), sa1) == NULL ||
276 set_address(tmp2, sizeof(tmp2), sa2) == NULL)
277 return -1;
278 if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len)
279 return -1;
280 snprintf(buf, len, "%s-%s", tmp1, tmp2);
281 return 0;
282 }
283
284 static char *
set_address(char * buf,size_t len,struct sockaddr * sa)285 set_address(char *buf, size_t len, struct sockaddr *sa)
286 {
287 const int niflags = NI_NUMERICHOST;
288
289 if (len < 1)
290 return NULL;
291 buf[0] = '\0';
292 if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0)
293 return NULL;
294 return buf;
295 }
296