1 /* $KAME: ipsec_dump_policy.c,v 1.11 2000/05/07 05:29:47 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("$FreeBSD$"); 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/socket.h> 38 39 #include <netkey/key_var.h> 40 #include <netinet/in.h> 41 #include <netinet6/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 __P((char *, size_t, 61 struct sadb_x_ipsecrequest *, size_t)); 62 static int set_addresses __P((char *, size_t, struct sockaddr *, 63 struct sockaddr *)); 64 static char *set_address __P((char *, size_t, struct sockaddr *)); 65 66 /* 67 * policy is sadb_x_policy buffer. 68 * Must call free() later. 69 * When delimiter == NULL, alternatively ' '(space) is applied. 70 */ 71 char * 72 ipsec_dump_policy(policy, delimiter) 73 caddr_t policy; 74 char *delimiter; 75 { 76 struct sadb_x_policy *xpl = (struct sadb_x_policy *)policy; 77 struct sadb_x_ipsecrequest *xisr; 78 size_t off, buflen; 79 char *buf; 80 char isrbuf[1024]; 81 char *newbuf; 82 83 /* sanity check */ 84 if (policy == NULL) 85 return NULL; 86 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 87 __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; 88 return NULL; 89 } 90 91 /* set delimiter */ 92 if (delimiter == NULL) 93 delimiter = " "; 94 95 switch (xpl->sadb_x_policy_dir) { 96 case IPSEC_DIR_ANY: 97 case IPSEC_DIR_INBOUND: 98 case IPSEC_DIR_OUTBOUND: 99 break; 100 default: 101 __ipsec_errcode = EIPSEC_INVAL_DIR; 102 return NULL; 103 } 104 105 switch (xpl->sadb_x_policy_type) { 106 case IPSEC_POLICY_DISCARD: 107 case IPSEC_POLICY_NONE: 108 case IPSEC_POLICY_IPSEC: 109 case IPSEC_POLICY_BYPASS: 110 case IPSEC_POLICY_ENTRUST: 111 break; 112 default: 113 __ipsec_errcode = EIPSEC_INVAL_POLICY; 114 return NULL; 115 } 116 117 buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir]) 118 + 1 /* space */ 119 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type]) 120 + 1; /* NUL */ 121 122 if ((buf = malloc(buflen)) == NULL) { 123 __ipsec_errcode = EIPSEC_NO_BUFS; 124 return NULL; 125 } 126 snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir], 127 ipsp_policy_strs[xpl->sadb_x_policy_type]); 128 129 if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { 130 __ipsec_errcode = EIPSEC_NO_ERROR; 131 return buf; 132 } 133 134 /* count length of buffer for use */ 135 off = sizeof(*xpl); 136 while (off < PFKEY_EXTLEN(xpl)) { 137 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); 138 off += xisr->sadb_x_ipsecrequest_len; 139 } 140 141 /* validity check */ 142 if (off != PFKEY_EXTLEN(xpl)) { 143 __ipsec_errcode = EIPSEC_INVAL_SADBMSG; 144 free(buf); 145 return NULL; 146 } 147 148 off = sizeof(*xpl); 149 while (off < PFKEY_EXTLEN(xpl)) { 150 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); 151 152 if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr, 153 PFKEY_EXTLEN(xpl) - off) == NULL) { 154 free(buf); 155 return NULL; 156 } 157 158 buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1; 159 newbuf = (char *)realloc(buf, buflen); 160 if (newbuf == NULL) { 161 __ipsec_errcode = EIPSEC_NO_BUFS; 162 free(buf); 163 return NULL; 164 } 165 buf = newbuf; 166 snprintf(buf, buflen, "%s%s%s", buf, 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 * 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 default: 201 __ipsec_errcode = EIPSEC_INVAL_PROTO; 202 return NULL; 203 } 204 205 switch (xisr->sadb_x_ipsecrequest_mode) { 206 case IPSEC_MODE_ANY: 207 mode = "any"; 208 break; 209 case IPSEC_MODE_TRANSPORT: 210 mode = "transport"; 211 break; 212 case IPSEC_MODE_TUNNEL: 213 mode = "tunnel"; 214 break; 215 default: 216 __ipsec_errcode = EIPSEC_INVAL_MODE; 217 return NULL; 218 } 219 220 abuf[0] = '\0'; 221 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 222 struct sockaddr *sa1, *sa2; 223 caddr_t p; 224 225 p = (caddr_t)(xisr + 1); 226 sa1 = (struct sockaddr *)p; 227 sa2 = (struct sockaddr *)(p + sa1->sa_len); 228 if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len != 229 xisr->sadb_x_ipsecrequest_len) { 230 __ipsec_errcode = EIPSEC_INVAL_ADDRESS; 231 return NULL; 232 } 233 if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) { 234 __ipsec_errcode = EIPSEC_INVAL_ADDRESS; 235 return NULL; 236 } 237 } 238 239 switch (xisr->sadb_x_ipsecrequest_level) { 240 case IPSEC_LEVEL_DEFAULT: 241 level = "default"; 242 break; 243 case IPSEC_LEVEL_USE: 244 level = "use"; 245 break; 246 case IPSEC_LEVEL_REQUIRE: 247 level = "require"; 248 break; 249 case IPSEC_LEVEL_UNIQUE: 250 level = "unique"; 251 break; 252 default: 253 __ipsec_errcode = EIPSEC_INVAL_LEVEL; 254 return NULL; 255 } 256 257 if (xisr->sadb_x_ipsecrequest_reqid == 0) 258 snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level); 259 else { 260 int ch; 261 262 if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX) 263 ch = '#'; 264 else 265 ch = ':'; 266 snprintf(buf, len, "%s/%s/%s/%s%c%d", proto, mode, abuf, level, 267 ch, xisr->sadb_x_ipsecrequest_reqid); 268 } 269 270 return buf; 271 } 272 273 static int 274 set_addresses(buf, len, sa1, sa2) 275 char *buf; 276 size_t len; 277 struct sockaddr *sa1; 278 struct sockaddr *sa2; 279 { 280 char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST]; 281 282 if (set_address(tmp1, sizeof(tmp1), sa1) == NULL || 283 set_address(tmp2, sizeof(tmp2), sa2) == NULL) 284 return -1; 285 if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len) 286 return -1; 287 snprintf(buf, len, "%s-%s", tmp1, tmp2); 288 return 0; 289 } 290 291 static char * 292 set_address(buf, len, sa) 293 char *buf; 294 size_t len; 295 struct sockaddr *sa; 296 { 297 #ifdef NI_WITHSCOPEID 298 const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; 299 #else 300 const int niflags = NI_NUMERICHOST; 301 #endif 302 303 if (len < 1) 304 return NULL; 305 buf[0] = '\0'; 306 if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0) 307 return NULL; 308 return buf; 309 } 310