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[FreeBSD/FreeBSD.git] / lib / libipsec / ipsec_dump_policy.c
1 /*
2  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the project nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31
32 #include <sys/types.h>
33 #include <sys/param.h>
34 #include <sys/socket.h>
35
36 #include <netkey/key_var.h>
37 #include <netinet/in.h>
38 #include <netinet6/ipsec.h>
39
40 #include <arpa/inet.h>
41
42 #include <stdlib.h>
43 #include <string.h>
44 #include <netdb.h>
45
46 #include "ipsec_strerror.h"
47
48 static const char *ipsp_dir_strs[] = {
49         "any", "in", "out",
50 };
51
52 static const char *ipsp_policy_strs[] = {
53         "discard", "none", "ipsec", "entrust", "bypass",
54 };
55
56 static int set_addresses __P((char *buf, caddr_t ptr));
57
58 /*
59  * policy is sadb_x_policy buffer.
60  * Must call free() later.
61  * When delimiter == NULL, alternatively ' '(space) is applied.
62  */
63 char *
64 ipsec_dump_policy(policy, delimiter)
65         caddr_t policy;
66         char *delimiter;
67 {
68         struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy;
69         struct sadb_x_ipsecrequest *xisr;
70         int xtlen, buflen;
71         char *buf;
72         int error;
73
74         /* sanity check */
75         if (policy == NULL)
76                 return NULL;
77         if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
78                 ipsec_errcode = EIPSEC_INVAL_EXTTYPE;
79                 return NULL;
80         }
81
82         /* set delimiter */
83         if (delimiter == NULL)
84                 delimiter = " ";
85
86         switch (xpl->sadb_x_policy_dir) {
87         case IPSEC_DIR_ANY:
88         case IPSEC_DIR_INBOUND:
89         case IPSEC_DIR_OUTBOUND:
90                 break;
91         default:
92                 ipsec_errcode = EIPSEC_INVAL_DIR;
93                 return NULL;
94         }
95
96         switch (xpl->sadb_x_policy_type) {
97         case IPSEC_POLICY_DISCARD:
98         case IPSEC_POLICY_NONE:
99         case IPSEC_POLICY_IPSEC:
100         case IPSEC_POLICY_BYPASS:
101         case IPSEC_POLICY_ENTRUST:
102                 break;
103         default:
104                 ipsec_errcode = EIPSEC_INVAL_POLICY;
105                 return NULL;
106         }
107
108         buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir])
109                 + 1     /* space */
110                 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type])
111                 + 1;    /* NUL */
112
113         if ((buf = malloc(buflen)) == NULL) {
114                 ipsec_errcode = EIPSEC_NO_BUFS;
115                 return NULL;
116         }
117         strcpy(buf, ipsp_dir_strs[xpl->sadb_x_policy_dir]);
118         strcat(buf, " ");
119         strcat(buf, ipsp_policy_strs[xpl->sadb_x_policy_type]);
120
121         if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
122                 ipsec_errcode = EIPSEC_NO_ERROR;
123                 return buf;
124         }
125
126         xtlen = PFKEY_EXTLEN(xpl) - sizeof(*xpl);
127         xisr = (struct sadb_x_ipsecrequest *)(xpl + 1);
128
129         /* count length of buffer for use */
130         /* XXX non-seriously */
131         while (xtlen > 0) {
132                 buflen += 20;
133                 if (xisr->sadb_x_ipsecrequest_mode ==IPSEC_MODE_TUNNEL)
134                         buflen += 50;
135                 xtlen -= xisr->sadb_x_ipsecrequest_len;
136                 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
137                                 + xisr->sadb_x_ipsecrequest_len);
138         }
139
140         /* validity check */
141         if (xtlen < 0) {
142                 ipsec_errcode = EIPSEC_INVAL_SADBMSG;
143                 free(buf);
144                 return NULL;
145         }
146
147         if ((buf = realloc(buf, buflen)) == NULL) {
148                 ipsec_errcode = EIPSEC_NO_BUFS;
149                 return NULL;
150         }
151
152         xtlen = PFKEY_EXTLEN(xpl) - sizeof(*xpl);
153         xisr = (struct sadb_x_ipsecrequest *)(xpl + 1);
154
155         while (xtlen > 0) {
156                 strcat(buf, delimiter);
157
158                 switch (xisr->sadb_x_ipsecrequest_proto) {
159                 case IPPROTO_ESP:
160                         strcat(buf, "esp");
161                         break;
162                 case IPPROTO_AH:
163                         strcat(buf, "ah");
164                         break;
165                 case IPPROTO_IPCOMP:
166                         strcat(buf, "ipcomp");
167                         break;
168                 default:
169                         ipsec_errcode = EIPSEC_INVAL_PROTO;
170                         free(buf);
171                         return NULL;
172                 }
173
174                 strcat(buf, "/");
175
176                 switch (xisr->sadb_x_ipsecrequest_mode) {
177                 case IPSEC_MODE_ANY:
178                         strcat(buf, "any");
179                         break;
180                 case IPSEC_MODE_TRANSPORT:
181                         strcat(buf, "transport");
182                         break;
183                 case IPSEC_MODE_TUNNEL:
184                         strcat(buf, "tunnel");
185                         break;
186                 default:
187                         ipsec_errcode = EIPSEC_INVAL_MODE;
188                         free(buf);
189                         return NULL;
190                 }
191
192                 strcat(buf, "/");
193
194                 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
195                         error = set_addresses(buf, (caddr_t)(xisr + 1));
196                         if (error) {
197                                 ipsec_errcode = EIPSEC_INVAL_MODE;
198                                 free(buf);
199                                 return NULL;
200                         }
201                 }
202
203                 switch (xisr->sadb_x_ipsecrequest_level) {
204                 case IPSEC_LEVEL_DEFAULT:
205                         strcat(buf, "/default");
206                         break;
207                 case IPSEC_LEVEL_USE:
208                         strcat(buf, "/use");
209                         break;
210                 case IPSEC_LEVEL_REQUIRE:
211                         strcat(buf, "/require");
212                         break;
213                 case IPSEC_LEVEL_UNIQUE:
214                         strcat(buf, "/unique");
215                         break;
216                 default:
217                         ipsec_errcode = EIPSEC_INVAL_LEVEL;
218                         free(buf);
219                         return NULL;
220                 }
221
222                 xtlen -= xisr->sadb_x_ipsecrequest_len;
223                 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
224                                 + xisr->sadb_x_ipsecrequest_len);
225         }
226
227         ipsec_errcode = EIPSEC_NO_ERROR;
228         return buf;
229 }
230
231 static int
232 set_addresses(buf, ptr)
233         char *buf;
234         caddr_t ptr;
235 {
236         char tmp[100]; /* XXX */
237         struct sockaddr *saddr = (struct sockaddr *)ptr;
238
239         getnameinfo(saddr, saddr->sa_len, tmp, sizeof(tmp),
240                 NULL, 0, NI_NUMERICHOST);
241
242         strcat(buf, tmp);
243
244         strcat(buf, "-");
245
246         saddr = (struct sockaddr *)((caddr_t)saddr + saddr->sa_len);
247         getnameinfo(saddr, saddr->sa_len, tmp, sizeof(tmp),
248                 NULL, 0, NI_NUMERICHOST);
249
250         strcat(buf, tmp);
251
252         return 0;
253 }