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d7ce7006 | 1 | /*\r |
2 | * Copyright (c) 1985, 1993\r | |
3 | * The Regents of the University of California. All rights reserved.\r | |
4 | *\r | |
5 | * Portions copyright (c) 1999, 2000\r | |
6 | * Intel Corporation.\r | |
7 | * All rights reserved.\r | |
8 | *\r | |
9 | * Redistribution and use in source and binary forms, with or without\r | |
10 | * modification, are permitted provided that the following conditions\r | |
11 | * are met:\r | |
12 | *\r | |
13 | * 1. Redistributions of source code must retain the above copyright\r | |
14 | * notice, this list of conditions and the following disclaimer.\r | |
15 | *\r | |
16 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
17 | * notice, this list of conditions and the following disclaimer in the\r | |
18 | * documentation and/or other materials provided with the distribution.\r | |
19 | *\r | |
20 | * 3. All advertising materials mentioning features or use of this software\r | |
21 | * must display the following acknowledgement:\r | |
22 | *\r | |
23 | * This product includes software developed by the University of\r | |
24 | * California, Berkeley, Intel Corporation, and its contributors.\r | |
25 | *\r | |
26 | * 4. Neither the name of University, Intel Corporation, or their respective\r | |
27 | * contributors may be used to endorse or promote products derived from\r | |
28 | * this software without specific prior written permission.\r | |
29 | *\r | |
30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND\r | |
31 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,\r | |
32 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS\r | |
33 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,\r | |
34 | * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,\r | |
35 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r | |
36 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\r | |
37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\r | |
38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r | |
39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\r | |
40 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r | |
41 | *\r | |
42 | */\r | |
43 | \r | |
44 | /*\r | |
45 | * Portions Copyright (c) 1993 by Digital Equipment Corporation.\r | |
46 | *\r | |
47 | * Permission to use, copy, modify, and distribute this software for any\r | |
48 | * purpose with or without fee is hereby granted, provided that the above\r | |
49 | * copyright notice and this permission notice appear in all copies, and that\r | |
50 | * the name of Digital Equipment Corporation not be used in advertising or\r | |
51 | * publicity pertaining to distribution of the document or software without\r | |
52 | * specific, written prior permission.\r | |
53 | *\r | |
54 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL\r | |
55 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES\r | |
56 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT\r | |
57 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r | |
58 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r | |
59 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r | |
60 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r | |
61 | * SOFTWARE.\r | |
62 | */\r | |
63 | \r | |
64 | /*\r | |
65 | * Portions Copyright (c) 1996 by Internet Software Consortium.\r | |
66 | *\r | |
67 | * Permission to use, copy, modify, and distribute this software for any\r | |
68 | * purpose with or without fee is hereby granted, provided that the above\r | |
69 | * copyright notice and this permission notice appear in all copies.\r | |
70 | *\r | |
71 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r | |
72 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r | |
73 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r | |
74 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r | |
75 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r | |
76 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r | |
77 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r | |
78 | * SOFTWARE.\r | |
79 | */\r | |
80 | \r | |
81 | #if defined(LIBC_SCCS) && !defined(lint)\r | |
82 | static char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";\r | |
83 | static char orig_rcsid[] = "From: Id: res_mkquery.c,v 8.9 1997/04/24 22:22:36 vixie Exp $";\r | |
84 | static char rcsid[] = "$Id: res_mkquery.c,v 1.1.1.1 2003/11/19 01:51:37 kyu3 Exp $";\r | |
85 | #endif /* LIBC_SCCS and not lint */\r | |
86 | \r | |
87 | #include <sys/types.h>\r | |
88 | #include <sys/param.h>\r | |
89 | #include <netinet/in.h>\r | |
90 | #include <arpa/nameser.h>\r | |
91 | #include <netdb.h>\r | |
92 | #include <resolv.h>\r | |
93 | #include <stdio.h>\r | |
94 | #include <string.h>\r | |
95 | \r | |
96 | #include "res_config.h"\r | |
97 | \r | |
98 | /*\r | |
99 | * Form all types of queries.\r | |
100 | * Returns the size of the result or -1.\r | |
101 | */\r | |
102 | int\r | |
103 | res_mkquery(\r | |
104 | int op, /* opcode of query */\r | |
105 | const char *dname, /* domain name */\r | |
106 | int class, /* class of query */\r | |
107 | int type, /* type of query */\r | |
108 | const u_char *data, /* resource record data */\r | |
109 | int datalen, /* length of data */\r | |
110 | const u_char *newrr_in, /* new rr for modify or append */\r | |
111 | u_char *buf, /* buffer to put query */\r | |
112 | int buflen /* size of buffer */\r | |
113 | )\r | |
114 | {\r | |
115 | register HEADER *hp;\r | |
116 | register u_char *cp;\r | |
117 | register int n;\r | |
118 | u_char *dnptrs[20], **dpp, **lastdnptr;\r | |
119 | \r | |
120 | if ((_res.options & RES_INIT) == 0 && res_init() == -1) {\r | |
121 | h_errno = NETDB_INTERNAL;\r | |
122 | return (-1);\r | |
123 | }\r | |
124 | #ifdef DEBUG\r | |
125 | if (_res.options & RES_DEBUG)\r | |
126 | printf(";; res_mkquery(%d, %s, %d, %d)\n",\r | |
127 | op, dname, class, type);\r | |
128 | #endif\r | |
129 | /*\r | |
130 | * Initialize header fields.\r | |
131 | */\r | |
132 | if ((buf == NULL) || (buflen < HFIXEDSZ))\r | |
133 | return (-1);\r | |
134 | memset(buf, 0, HFIXEDSZ);\r | |
135 | hp = (HEADER *) buf;\r | |
136 | hp->id = htons(++_res.id);\r | |
137 | hp->opcode = op;\r | |
138 | hp->rd = (_res.options & RES_RECURSE) != 0;\r | |
139 | hp->rcode = NOERROR;\r | |
140 | cp = buf + HFIXEDSZ;\r | |
141 | buflen -= HFIXEDSZ;\r | |
142 | dpp = dnptrs;\r | |
143 | *dpp++ = buf;\r | |
144 | *dpp++ = NULL;\r | |
145 | lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];\r | |
146 | /*\r | |
147 | * perform opcode specific processing\r | |
148 | */\r | |
149 | switch (op) {\r | |
150 | case QUERY: /*FALLTHROUGH*/\r | |
151 | case NS_NOTIFY_OP:\r | |
152 | if ((buflen -= QFIXEDSZ) < 0)\r | |
153 | return (-1);\r | |
154 | if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)\r | |
155 | return (-1);\r | |
156 | cp += n;\r | |
157 | buflen -= n;\r | |
158 | __putshort((u_int16_t)type, cp);\r | |
159 | cp += INT16SZ;\r | |
160 | __putshort((u_int16_t)class, cp);\r | |
161 | cp += INT16SZ;\r | |
162 | hp->qdcount = htons(1);\r | |
163 | if (op == QUERY || data == NULL)\r | |
164 | break;\r | |
165 | /*\r | |
166 | * Make an additional record for completion domain.\r | |
167 | */\r | |
168 | buflen -= RRFIXEDSZ;\r | |
169 | n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);\r | |
170 | if (n < 0)\r | |
171 | return (-1);\r | |
172 | cp += n;\r | |
173 | buflen -= n;\r | |
174 | __putshort(T_NULL, cp);\r | |
175 | cp += INT16SZ;\r | |
176 | __putshort((u_int16_t)class, cp);\r | |
177 | cp += INT16SZ;\r | |
178 | __putlong(0, cp);\r | |
179 | cp += INT32SZ;\r | |
180 | __putshort(0, cp);\r | |
181 | cp += INT16SZ;\r | |
182 | hp->arcount = htons(1);\r | |
183 | break;\r | |
184 | \r | |
185 | case IQUERY:\r | |
186 | /*\r | |
187 | * Initialize answer section\r | |
188 | */\r | |
189 | if (buflen < 1 + RRFIXEDSZ + datalen)\r | |
190 | return (-1);\r | |
191 | *cp++ = '\0'; /* no domain name */\r | |
192 | __putshort((u_int16_t)type, cp);\r | |
193 | cp += INT16SZ;\r | |
194 | __putshort((u_int16_t)class, cp);\r | |
195 | cp += INT16SZ;\r | |
196 | __putlong(0, cp);\r | |
197 | cp += INT32SZ;\r | |
198 | __putshort((u_int16_t)datalen, cp);\r | |
199 | cp += INT16SZ;\r | |
200 | if (datalen) {\r | |
201 | memcpy(cp, data, datalen);\r | |
202 | cp += datalen;\r | |
203 | }\r | |
204 | hp->ancount = htons(1);\r | |
205 | break;\r | |
206 | \r | |
207 | default:\r | |
208 | return (-1);\r | |
209 | }\r | |
210 | return ((int)(cp - buf));\r | |
211 | }\r |