[mirror_edk2.git] / StdLib / BsdSocketLib / ns_parse.c

/*\r
 * Copyright (c) 1996 by Internet Software Consortium.\r
 *\r
 * Permission to use, copy, modify, and distribute this software for any\r
 * purpose with or without fee is hereby granted, provided that the above\r
 * copyright notice and this permission notice appear in all copies.\r
 *\r
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
 * SOFTWARE.\r
 */\r
\r
/*\r
 * Portions copyright (c) 1999, 2000\r
 * Intel Corporation.\r
 * All rights reserved.\r
 * \r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * \r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * \r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * \r
 * 3. All advertising materials mentioning features or use of this software\r
 *    must display the following acknowledgement:\r
 * \r
 *    This product includes software developed by Intel Corporation and\r
 *    its contributors.\r
 * \r
 * 4. Neither the name of Intel Corporation or its contributors may be\r
 *    used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 * \r
 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
 * THE POSSIBILITY OF SUCH DAMAGE.\r
 * \r
 */\r
\r
#ifndef lint\r
static char rcsid[] = "$Id: ns_parse.c,v 1.1.1.1 2003/11/19 01:51:33 kyu3 Exp $";\r
#endif\r
\r
#include <sys/types.h>\r
\r
#include <netinet/in.h>\r
#include <arpa/nameser.h>\r
\r
#include <errno.h>\r
#include <resolv.h>\r
#include <string.h>\r
\r
/* These need to be in the same order as the nres.h:ns_flag enum. */\r
struct _ns_flagdata _ns_flagdata[16] = {\r
	{ 0x8000, 15 },		/* qr. */\r
	{ 0x7800, 11 },		/* opcode. */\r
	{ 0x0400, 10 },		/* aa. */\r
	{ 0x0200, 9 },		/* tc. */\r
	{ 0x0100, 8 },		/* rd. */\r
	{ 0x0080, 7 },		/* ra. */\r
	{ 0x0040, 6 },		/* z. */\r
	{ 0x0020, 5 },		/* ad. */\r
	{ 0x0010, 4 },		/* cd. */\r
	{ 0x000f, 0 },		/* rcode. */\r
	{ 0x0000, 0 },		/* expansion (1/6). */\r
	{ 0x0000, 0 },		/* expansion (2/6). */\r
	{ 0x0000, 0 },		/* expansion (3/6). */\r
	{ 0x0000, 0 },		/* expansion (4/6). */\r
	{ 0x0000, 0 },		/* expansion (5/6). */\r
	{ 0x0000, 0 },		/* expansion (6/6). */\r
};\r
\r
static int\r
skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count) {\r
	const u_char *optr = ptr;\r
\r
	for ((void)NULL; count > 0; count--) {\r
		int b, rdlength;\r
\r
		b = dn_skipname(ptr, eom);\r
		if (b < 0)\r
			goto emsgsize;\r
		ptr += b/*Name*/ + NS_INT16SZ/*Type*/ + NS_INT16SZ/*Class*/;\r
		if (section != ns_s_qd) {\r
			if (ptr + NS_INT32SZ > eom)\r
				goto emsgsize;\r
			ptr += NS_INT32SZ/*TTL*/;\r
			if (ptr + NS_INT16SZ > eom)\r
				goto emsgsize;\r
			NS_GET16(rdlength, ptr);\r
			ptr += rdlength/*RData*/;\r
		}\r
	}\r
	if (ptr > eom)\r
		goto emsgsize;\r
	return ((int)(ptr - optr));\r
 emsgsize:\r
	errno = EMSGSIZE;\r
	return (-1);\r
}\r
\r
int\r
ns_initparse(const u_char *msg, int msglen, ns_msg *handle) {\r
	const u_char *eom = msg + msglen;\r
	int i;\r
\r
	memset(handle, 0x5e, sizeof *handle);\r
	handle->_msg = msg;\r
	handle->_eom = eom;\r
	if (msg + NS_INT16SZ > eom)\r
		goto emsgsize;\r
	NS_GET16(handle->_id, msg);\r
	if (msg + NS_INT16SZ > eom)\r
		goto emsgsize;\r
	NS_GET16(handle->_flags, msg);\r
	for (i = 0; i < ns_s_max; i++) {\r
		if (msg + NS_INT16SZ > eom)\r
			goto emsgsize;\r
		NS_GET16(handle->_counts[i], msg);\r
	}\r
	for (i = 0; i < ns_s_max; i++)\r
		if (handle->_counts[i] == 0)\r
			handle->_sections[i] = NULL;\r
		else {\r
			int b = skiprr(msg, eom, (ns_sect)i,\r
				       handle->_counts[i]);\r
\r
			if (b < 0)\r
				return (-1);\r
			handle->_sections[i] = msg;\r
			msg += b;\r
		}\r
	if (msg != eom)\r
		goto emsgsize;\r
	handle->_sect = ns_s_max;\r
	handle->_rrnum = -1;\r
	handle->_msg_ptr = NULL;\r
	return (0);\r
 emsgsize:\r
	errno = EMSGSIZE;\r
	return (-1);\r
}\r
\r
int\r
ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {\r
	int b;\r
\r
	/* Make section right. */\r
	if (section < 0 || section >= ns_s_max)\r
		goto enodev;\r
	if ((int)section != (int)handle->_sect) {\r
		handle->_sect = section;\r
		handle->_rrnum = 0;\r
		handle->_msg_ptr = handle->_sections[(int)section];\r
	}\r
\r
	/* Make rrnum right. */\r
	if (rrnum == -1)\r
		rrnum = handle->_rrnum;\r
	if (rrnum < 0 || rrnum >= handle->_counts[(int)section])\r
		goto enodev;\r
	if (rrnum < handle->_rrnum) {\r
		handle->_rrnum = 0;\r
		handle->_msg_ptr = handle->_sections[(int)section];\r
	}\r
	\r
	b = skiprr(handle->_msg, handle->_eom, section,\r
		   rrnum - handle->_rrnum);\r
	if (b < 0)\r
		return (-1);\r
	handle->_msg_ptr += b;\r
	handle->_rrnum = rrnum;\r
\r
	/* Do the parse. */\r
	b = dn_expand(handle->_msg, handle->_eom,\r
		      handle->_msg_ptr, rr->name, NS_MAXDNAME);\r
	if (b < 0)\r
		return (-1);\r
	handle->_msg_ptr += b;\r
	if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
		goto emsgsize;\r
	NS_GET16(rr->type, handle->_msg_ptr);\r
	if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
		goto emsgsize;\r
	NS_GET16(rr->rr_class, handle->_msg_ptr);\r
	if (section == ns_s_qd) {\r
		rr->ttl = 0;\r
		rr->rdlength = 0;\r
		rr->rdata = NULL;\r
	} else {\r
		if (handle->_msg_ptr + NS_INT32SZ > handle->_eom)\r
			goto emsgsize;\r
		NS_GET32(rr->ttl, handle->_msg_ptr);\r
		if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
			goto emsgsize;\r
		NS_GET16(rr->rdlength, handle->_msg_ptr);\r
		if (handle->_msg_ptr + rr->rdlength > handle->_eom)\r
			goto emsgsize;\r
		rr->rdata = handle->_msg_ptr;\r
		handle->_msg_ptr += rr->rdlength;\r
	}\r
	handle->_rrnum++;\r
\r
	/* All done. */\r
	return (0);\r
 enodev:\r
	errno = ENODEV;\r
	return (-1);\r
 emsgsize:\r
	errno = EMSGSIZE;\r
	return (-1);\r
}\r
Commit	Line	Data
d7ce7006	1	/*\r
	2	* Copyright (c) 1996 by Internet Software Consortium.\r
	3	*\r
	4	* Permission to use, copy, modify, and distribute this software for any\r
	5	* purpose with or without fee is hereby granted, provided that the above\r
	6	* copyright notice and this permission notice appear in all copies.\r
	7	*\r
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
	9	* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
	10	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
	11	* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
	12	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
	13	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
	14	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
	15	* SOFTWARE.\r
	16	*/\r
	17	\r
	18	/*\r
	19	* Portions copyright (c) 1999, 2000\r
	20	* Intel Corporation.\r
	21	* All rights reserved.\r
	22	* \r
	23	* Redistribution and use in source and binary forms, with or without\r
	24	* modification, are permitted provided that the following conditions\r
	25	* are met:\r
	26	* \r
	27	* 1. Redistributions of source code must retain the above copyright\r
	28	* notice, this list of conditions and the following disclaimer.\r
	29	* \r
	30	* 2. Redistributions in binary form must reproduce the above copyright\r
	31	* notice, this list of conditions and the following disclaimer in the\r
	32	* documentation and/or other materials provided with the distribution.\r
	33	* \r
	34	* 3. All advertising materials mentioning features or use of this software\r
	35	* must display the following acknowledgement:\r
	36	* \r
	37	* This product includes software developed by Intel Corporation and\r
	38	* its contributors.\r
	39	* \r
	40	* 4. Neither the name of Intel Corporation or its contributors may be\r
	41	* used to endorse or promote products derived from this software\r
	42	* without specific prior written permission.\r
	43	* \r
	44	* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
	45	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
	47	* ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
	48	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
	49	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
	50	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
	51	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
	52	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
	53	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
	54	* THE POSSIBILITY OF SUCH DAMAGE.\r
	55	* \r
	56	*/\r
	57	\r
	58	#ifndef lint\r
	59	static char rcsid[] = "$Id: ns_parse.c,v 1.1.1.1 2003/11/19 01:51:33 kyu3 Exp $";\r
	60	#endif\r
	61	\r
	62	#include <sys/types.h>\r
	63	\r
	64	#include <netinet/in.h>\r
65	#include <arpa/nameser.h>\r
66	\r
67	#include <errno.h>\r
68	#include <resolv.h>\r
69	#include <string.h>\r
70	\r
71	/* These need to be in the same order as the nres.h:ns_flag enum. */\r
72	struct _ns_flagdata _ns_flagdata[16] = {\r
73	{ 0x8000, 15 }, /* qr. */\r
74	{ 0x7800, 11 }, /* opcode. */\r
75	{ 0x0400, 10 }, /* aa. */\r
76	{ 0x0200, 9 }, /* tc. */\r
77	{ 0x0100, 8 }, /* rd. */\r
78	{ 0x0080, 7 }, /* ra. */\r
79	{ 0x0040, 6 }, /* z. */\r
80	{ 0x0020, 5 }, /* ad. */\r
81	{ 0x0010, 4 }, /* cd. */\r
82	{ 0x000f, 0 }, /* rcode. */\r
83	{ 0x0000, 0 }, /* expansion (1/6). */\r
84	{ 0x0000, 0 }, /* expansion (2/6). */\r
85	{ 0x0000, 0 }, /* expansion (3/6). */\r
86	{ 0x0000, 0 }, /* expansion (4/6). */\r
87	{ 0x0000, 0 }, /* expansion (5/6). */\r
88	{ 0x0000, 0 }, /* expansion (6/6). */\r
89	};\r
90	\r
91	static int\r
92	skiprr(const u_char ptr, const u_char eom, ns_sect section, int count) {\r
93	const u_char *optr = ptr;\r
94	\r
95	for ((void)NULL; count > 0; count--) {\r
96	int b, rdlength;\r
97	\r
98	b = dn_skipname(ptr, eom);\r
99	if (b < 0)\r
100	goto emsgsize;\r
101	ptr += b/Name/ + NS_INT16SZ/Type/ + NS_INT16SZ/Class/;\r
102	if (section != ns_s_qd) {\r
103	if (ptr + NS_INT32SZ > eom)\r
104	goto emsgsize;\r
105	ptr += NS_INT32SZ/TTL/;\r
106	if (ptr + NS_INT16SZ > eom)\r
107	goto emsgsize;\r
108	NS_GET16(rdlength, ptr);\r
109	ptr += rdlength/RData/;\r
110	}\r
111	}\r
112	if (ptr > eom)\r
113	goto emsgsize;\r
114	return ((int)(ptr - optr));\r
115	emsgsize:\r
116	errno = EMSGSIZE;\r
117	return (-1);\r
118	}\r
119	\r
120	int\r
121	ns_initparse(const u_char msg, int msglen, ns_msg handle) {\r
122	const u_char *eom = msg + msglen;\r
123	int i;\r
124	\r
125	memset(handle, 0x5e, sizeof *handle);\r
126	handle->_msg = msg;\r
127	handle->_eom = eom;\r
128	if (msg + NS_INT16SZ > eom)\r
129	goto emsgsize;\r
130	NS_GET16(handle->_id, msg);\r
131	if (msg + NS_INT16SZ > eom)\r
132	goto emsgsize;\r
133	NS_GET16(handle->_flags, msg);\r
134	for (i = 0; i < ns_s_max; i++) {\r
135	if (msg + NS_INT16SZ > eom)\r
136	goto emsgsize;\r
137	NS_GET16(handle->_counts[i], msg);\r
138	}\r
139	for (i = 0; i < ns_s_max; i++)\r
140	if (handle->_counts[i] == 0)\r
141	handle->_sections[i] = NULL;\r
142	else {\r
143	int b = skiprr(msg, eom, (ns_sect)i,\r
144	handle->_counts[i]);\r
145	\r
146	if (b < 0)\r
147	return (-1);\r
148	handle->_sections[i] = msg;\r
149	msg += b;\r
150	}\r
151	if (msg != eom)\r
152	goto emsgsize;\r
153	handle->_sect = ns_s_max;\r
154	handle->_rrnum = -1;\r
155	handle->_msg_ptr = NULL;\r
156	return (0);\r
157	emsgsize:\r
158	errno = EMSGSIZE;\r
159	return (-1);\r
160	}\r
161	\r
162	int\r
163	ns_parserr(ns_msg handle, ns_sect section, int rrnum, ns_rr rr) {\r
164	int b;\r
165	\r
166	/* Make section right. */\r
167	if (section < 0 \|\| section >= ns_s_max)\r
168	goto enodev;\r
169	if ((int)section != (int)handle->_sect) {\r
170	handle->_sect = section;\r
171	handle->_rrnum = 0;\r
172	handle->_msg_ptr = handle->_sections[(int)section];\r
173	}\r
174	\r
175	/* Make rrnum right. */\r
176	if (rrnum == -1)\r
177	rrnum = handle->_rrnum;\r
178	if (rrnum < 0 \|\| rrnum >= handle->_counts[(int)section])\r
179	goto enodev;\r
180	if (rrnum < handle->_rrnum) {\r
181	handle->_rrnum = 0;\r
182	handle->_msg_ptr = handle->_sections[(int)section];\r
183	}\r
184	\r
185	b = skiprr(handle->_msg, handle->_eom, section,\r
186	rrnum - handle->_rrnum);\r
187	if (b < 0)\r
188	return (-1);\r
189	handle->_msg_ptr += b;\r
190	handle->_rrnum = rrnum;\r
191	\r
192	/* Do the parse. */\r
193	b = dn_expand(handle->_msg, handle->_eom,\r
194	handle->_msg_ptr, rr->name, NS_MAXDNAME);\r
195	if (b < 0)\r
196	return (-1);\r
197	handle->_msg_ptr += b;\r
198	if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
199	goto emsgsize;\r
200	NS_GET16(rr->type, handle->_msg_ptr);\r
201	if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
202	goto emsgsize;\r
203	NS_GET16(rr->rr_class, handle->_msg_ptr);\r
204	if (section == ns_s_qd) {\r
205	rr->ttl = 0;\r
206	rr->rdlength = 0;\r
207	rr->rdata = NULL;\r
208	} else {\r
209	if (handle->_msg_ptr + NS_INT32SZ > handle->_eom)\r
210	goto emsgsize;\r
211	NS_GET32(rr->ttl, handle->_msg_ptr);\r
212	if (handle->_msg_ptr + NS_INT16SZ > handle->_eom)\r
213	goto emsgsize;\r
214	NS_GET16(rr->rdlength, handle->_msg_ptr);\r
215	if (handle->_msg_ptr + rr->rdlength > handle->_eom)\r
216	goto emsgsize;\r
217	rr->rdata = handle->_msg_ptr;\r
218	handle->_msg_ptr += rr->rdlength;\r
219	}\r
220	handle->_rrnum++;\r
221	\r
222	/* All done. */\r
223	return (0);\r
224	enodev:\r
225	errno = ENODEV;\r
226	return (-1);\r
227	emsgsize:\r
228	errno = EMSGSIZE;\r
229	return (-1);\r
230	}\r