+++ /dev/null
-/** @file\r
- Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials are licensed and made available under\r
- the terms and conditions of the BSD License that accompanies this distribution.\r
- The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php.\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\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
- * 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
-#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 ((unsigned int)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
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