Match acpi_cpu_add_child()'s prototype with that of the corresponding
[dragonfly.git] / lib / libipsec / policy_parse.y
blob4954d8266772ca73f5dde8a95f85be8baf2ed920
1 /* $FreeBSD: src/lib/libipsec/policy_parse.y,v 1.1.2.1 2000/07/15 07:24:04 kris Exp $ */
2 /* $DragonFly: src/lib/libipsec/policy_parse.y,v 1.4 2008/09/30 16:57:05 swildner Exp $ */
3 /* $KAME: policy_parse.y,v 1.10 2000/05/07 05:25:03 itojun Exp $ */
5 /*
6 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
7 * All rights reserved.
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.
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.
35 * IN/OUT bound policy configuration take place such below:
36 * in <policy>
37 * out <policy>
39 * <policy> is one of following:
40 * "discard", "none", "ipsec <requests>", "entrust", "bypass",
42 * The following requests are accepted as <requests>:
44 * protocol/mode/src-dst/level
45 * protocol/mode/src-dst parsed as protocol/mode/src-dst/default
46 * protocol/mode/src-dst/ parsed as protocol/mode/src-dst/default
47 * protocol/transport parsed as protocol/mode/any-any/default
48 * protocol/transport//level parsed as protocol/mode/any-any/level
50 * You can concatenate these requests with either ' '(single space) or '\n'.
54 #include <sys/types.h>
55 #include <sys/param.h>
56 #include <sys/socket.h>
58 #include <netinet/in.h>
59 #include <netinet6/ipsec.h>
61 #include <stdlib.h>
62 #include <stdio.h>
63 #include <string.h>
64 #include <netdb.h>
66 #include "ipsec_strerror.h"
68 #define ATOX(c) \
69 (isdigit(c) ? (c - '0') : (isupper(c) ? (c - 'A' + 10) : (c - 'a' + 10) ))
71 static caddr_t pbuf = NULL; /* sadb_x_policy buffer */
72 static int tlen = 0; /* total length of pbuf */
73 static int offset = 0; /* offset of pbuf */
74 static int p_dir, p_type, p_protocol, p_mode, p_level, p_reqid;
75 static struct sockaddr *p_src = NULL;
76 static struct sockaddr *p_dst = NULL;
78 struct _val;
79 extern void yyerror (char *msg);
80 static struct sockaddr *parse_sockaddr (struct _val *buf);
81 static int rule_check (void);
82 static int init_x_policy (void);
83 static int set_x_request (struct sockaddr *src, struct sockaddr *dst);
84 static int set_sockaddr (struct sockaddr *addr);
85 static void policy_parse_request_init (void);
86 static caddr_t policy_parse (char *msg, int msglen);
88 extern void __policy__strbuffer__init__ (char *msg);
89 extern int yyparse (void);
90 extern int yylex (void);
94 %union {
95 u_int num;
96 struct _val {
97 int len;
98 char *buf;
99 } val;
102 %token DIR ACTION PROTOCOL MODE LEVEL LEVEL_SPECIFY
103 %token IPADDRESS
104 %token ME ANY
105 %token SLASH HYPHEN
106 %type <num> DIR ACTION PROTOCOL MODE LEVEL
107 %type <val> IPADDRESS LEVEL_SPECIFY
110 policy_spec
111 : DIR ACTION
113 p_dir = $1;
114 p_type = $2;
116 if (init_x_policy())
117 return -1;
119 rules
120 | DIR
122 p_dir = $1;
123 p_type = 0; /* ignored it by kernel */
125 if (init_x_policy())
126 return -1;
130 rules
131 : /*NOTHING*/
132 | rules rule {
133 if (rule_check() < 0)
134 return -1;
136 if (set_x_request(p_src, p_dst) < 0)
137 return -1;
139 policy_parse_request_init();
143 rule
144 : protocol SLASH mode SLASH addresses SLASH level
145 | protocol SLASH mode SLASH addresses SLASH
146 | protocol SLASH mode SLASH addresses
147 | protocol SLASH mode SLASH
148 | protocol SLASH mode SLASH SLASH level
149 | protocol SLASH mode
150 | protocol SLASH {
151 __ipsec_errcode = EIPSEC_FEW_ARGUMENTS;
152 return -1;
154 | protocol {
155 __ipsec_errcode = EIPSEC_FEW_ARGUMENTS;
156 return -1;
160 protocol
161 : PROTOCOL { p_protocol = $1; }
164 mode
165 : MODE { p_mode = $1; }
168 level
169 : LEVEL {
170 p_level = $1;
171 p_reqid = 0;
173 | LEVEL_SPECIFY {
174 p_level = IPSEC_LEVEL_UNIQUE;
175 p_reqid = atol($1.buf); /* atol() is good. */
179 addresses
180 : IPADDRESS {
181 p_src = parse_sockaddr(&$1);
182 if (p_src == NULL)
183 return -1;
185 HYPHEN
186 IPADDRESS {
187 p_dst = parse_sockaddr(&$4);
188 if (p_dst == NULL)
189 return -1;
191 | ME HYPHEN ANY {
192 if (p_dir != IPSEC_DIR_OUTBOUND) {
193 __ipsec_errcode = EIPSEC_INVAL_DIR;
194 return -1;
197 | ANY HYPHEN ME {
198 if (p_dir != IPSEC_DIR_INBOUND) {
199 __ipsec_errcode = EIPSEC_INVAL_DIR;
200 return -1;
204 | ME HYPHEN ME
210 void
211 yyerror(char *msg)
213 extern char *__libipsecyytext; /*XXX*/
215 fprintf(stderr, "libipsec: %s while parsing \"%s\"\n",
216 msg, __libipsecyytext);
218 return;
221 static struct sockaddr *
222 parse_sockaddr(struct _val *buf)
224 struct addrinfo hints, *res;
225 char *serv = NULL;
226 int error;
227 struct sockaddr *newaddr = NULL;
229 memset(&hints, 0, sizeof(hints));
230 hints.ai_family = PF_UNSPEC;
231 hints.ai_flags = AI_NUMERICHOST;
232 error = getaddrinfo(buf->buf, serv, &hints, &res);
233 if (error != 0) {
234 yyerror("invalid IP address");
235 __ipsec_set_strerror(gai_strerror(error));
236 return NULL;
239 if (res->ai_addr == NULL) {
240 yyerror("invalid IP address");
241 __ipsec_set_strerror(gai_strerror(error));
242 return NULL;
245 newaddr = malloc(res->ai_addr->sa_len);
246 if (newaddr == NULL) {
247 __ipsec_errcode = EIPSEC_NO_BUFS;
248 freeaddrinfo(res);
249 return NULL;
251 memcpy(newaddr, res->ai_addr, res->ai_addr->sa_len);
253 freeaddrinfo(res);
255 __ipsec_errcode = EIPSEC_NO_ERROR;
256 return newaddr;
259 static int
260 rule_check(void)
262 if (p_type == IPSEC_POLICY_IPSEC) {
263 if (p_protocol == IPPROTO_IP) {
264 __ipsec_errcode = EIPSEC_NO_PROTO;
265 return -1;
268 if (p_mode != IPSEC_MODE_TRANSPORT
269 && p_mode != IPSEC_MODE_TUNNEL) {
270 __ipsec_errcode = EIPSEC_INVAL_MODE;
271 return -1;
274 if (p_src == NULL && p_dst == NULL) {
275 if (p_mode != IPSEC_MODE_TRANSPORT) {
276 __ipsec_errcode = EIPSEC_INVAL_ADDRESS;
277 return -1;
280 else if (p_src->sa_family != p_dst->sa_family) {
281 __ipsec_errcode = EIPSEC_FAMILY_MISMATCH;
282 return -1;
286 __ipsec_errcode = EIPSEC_NO_ERROR;
287 return 0;
290 static int
291 init_x_policy(void)
293 struct sadb_x_policy *p;
295 tlen = sizeof(struct sadb_x_policy);
297 pbuf = malloc(tlen);
298 if (pbuf == NULL) {
299 __ipsec_errcode = EIPSEC_NO_BUFS;
300 return -1;
302 p = (struct sadb_x_policy *)pbuf;
303 p->sadb_x_policy_len = 0; /* must update later */
304 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
305 p->sadb_x_policy_type = p_type;
306 p->sadb_x_policy_dir = p_dir;
307 p->sadb_x_policy_reserved = 0;
308 offset = tlen;
310 __ipsec_errcode = EIPSEC_NO_ERROR;
311 return 0;
314 static int
315 set_x_request(struct sockaddr *src, struct sockaddr *dst)
317 struct sadb_x_ipsecrequest *p;
318 int reqlen;
320 reqlen = sizeof(*p)
321 + (src ? src->sa_len : 0)
322 + (dst ? dst->sa_len : 0);
323 tlen += reqlen; /* increment to total length */
325 pbuf = realloc(pbuf, tlen);
326 if (pbuf == NULL) {
327 __ipsec_errcode = EIPSEC_NO_BUFS;
328 return -1;
330 p = (struct sadb_x_ipsecrequest *)&pbuf[offset];
331 p->sadb_x_ipsecrequest_len = reqlen;
332 p->sadb_x_ipsecrequest_proto = p_protocol;
333 p->sadb_x_ipsecrequest_mode = p_mode;
334 p->sadb_x_ipsecrequest_level = p_level;
335 p->sadb_x_ipsecrequest_reqid = p_reqid;
336 offset += sizeof(*p);
338 if (set_sockaddr(src) || set_sockaddr(dst))
339 return -1;
341 __ipsec_errcode = EIPSEC_NO_ERROR;
342 return 0;
345 static int
346 set_sockaddr(struct sockaddr *addr)
348 if (addr == NULL) {
349 __ipsec_errcode = EIPSEC_NO_ERROR;
350 return 0;
353 /* tlen has already incremented */
355 memcpy(&pbuf[offset], addr, addr->sa_len);
357 offset += addr->sa_len;
359 __ipsec_errcode = EIPSEC_NO_ERROR;
360 return 0;
363 static void
364 policy_parse_request_init(void)
366 p_protocol = IPPROTO_IP;
367 p_mode = IPSEC_MODE_ANY;
368 p_level = IPSEC_LEVEL_DEFAULT;
369 p_reqid = 0;
370 if (p_src != NULL) {
371 free(p_src);
372 p_src = NULL;
374 if (p_dst != NULL) {
375 free(p_dst);
376 p_dst = NULL;
379 return;
382 static caddr_t
383 policy_parse(char *msg, int msglen)
385 int error;
386 pbuf = NULL;
387 tlen = 0;
389 /* initialize */
390 p_dir = IPSEC_DIR_INVALID;
391 p_type = IPSEC_POLICY_DISCARD;
392 policy_parse_request_init();
393 __policy__strbuffer__init__(msg);
395 error = yyparse(); /* it must be set errcode. */
396 if (error) {
397 if (pbuf != NULL)
398 free(pbuf);
399 return NULL;
402 /* update total length */
403 ((struct sadb_x_policy *)pbuf)->sadb_x_policy_len = PFKEY_UNIT64(tlen);
405 __ipsec_errcode = EIPSEC_NO_ERROR;
407 return pbuf;
410 caddr_t
411 ipsec_set_policy(char *msg, int msglen)
413 caddr_t policy;
415 policy = policy_parse(msg, msglen);
416 if (policy == NULL) {
417 if (__ipsec_errcode == EIPSEC_NO_ERROR)
418 __ipsec_errcode = EIPSEC_INVAL_ARGUMENT;
419 return NULL;
422 __ipsec_errcode = EIPSEC_NO_ERROR;
423 return policy;