Commit | Line | Data |
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882ceeb2 | 1 | /*- |
8ea4199d | 2 | * Copyright (c) 1985 Regents of the University of California. |
6b2f9dd0 KB |
3 | * All rights reserved. |
4 | * | |
269a7923 | 5 | * %sccs.include.redist.c% |
882ceeb2 MK |
6 | * - |
7 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. | |
8 | * | |
9 | * Permission to use, copy, modify, and distribute this software for any | |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies, and that | |
12 | * the name of Digital Equipment Corporation not be used in advertising or | |
13 | * publicity pertaining to distribution of the document or software without | |
14 | * specific, written prior permission. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL | |
17 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT | |
19 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
20 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
21 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
22 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
23 | * SOFTWARE. | |
24 | * - | |
25 | * --Copyright-- | |
b423e985 | 26 | */ |
5e95d9b7 | 27 | |
2ce81398 | 28 | #if defined(LIBC_SCCS) && !defined(lint) |
882ceeb2 MK |
29 | static char sccsid[] = "@(#)res_mkquery.c 6.17 (Berkeley) %G%"; |
30 | static char rcsid[] = "$Id: res_mkquery.c,v 4.9.1.2 1993/05/17 10:00:01 vixie Exp $"; | |
6b2f9dd0 | 31 | #endif /* LIBC_SCCS and not lint */ |
8ea4199d | 32 | |
7596199c | 33 | #include <sys/param.h> |
5e95d9b7 | 34 | #include <netinet/in.h> |
61e99f72 | 35 | #include <arpa/nameser.h> |
f94b2f50 | 36 | #include <resolv.h> |
24fac7d8 KB |
37 | #include <stdio.h> |
38 | #include <string.h> | |
5e95d9b7 RC |
39 | |
40 | /* | |
41 | * Form all types of queries. | |
42 | * Returns the size of the result or -1. | |
43 | */ | |
882ceeb2 | 44 | res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen) |
5e95d9b7 | 45 | int op; /* opcode of query */ |
24fac7d8 | 46 | const char *dname; /* domain name */ |
5e95d9b7 | 47 | int class, type; /* class and type of query */ |
24fac7d8 | 48 | const char *data; /* resource record data */ |
5e95d9b7 | 49 | int datalen; /* length of data */ |
882ceeb2 | 50 | const char *newrr_in; /* new rr for modify or append */ |
5e95d9b7 RC |
51 | char *buf; /* buffer to put query */ |
52 | int buflen; /* size of buffer */ | |
53 | { | |
54 | register HEADER *hp; | |
55 | register char *cp; | |
56 | register int n; | |
882ceeb2 | 57 | struct rrec *newrr = (struct rrec *) newrr_in; |
5e95d9b7 | 58 | char *dnptrs[10], **dpp, **lastdnptr; |
5e95d9b7 | 59 | |
ae94a224 | 60 | #ifdef DEBUG |
5e95d9b7 | 61 | if (_res.options & RES_DEBUG) |
882ceeb2 MK |
62 | printf(";; res_mkquery(%d, %s, %d, %d)\n", |
63 | op, dname, class, type); | |
64 | #endif | |
5e95d9b7 RC |
65 | /* |
66 | * Initialize header fields. | |
67 | */ | |
43c7d2d3 JB |
68 | if ((buf == NULL) || (buflen < sizeof(HEADER))) |
69 | return(-1); | |
83d504bd | 70 | bzero(buf, sizeof(HEADER)); |
5e95d9b7 RC |
71 | hp = (HEADER *) buf; |
72 | hp->id = htons(++_res.id); | |
73 | hp->opcode = op; | |
5e95d9b7 RC |
74 | hp->pr = (_res.options & RES_PRIMARY) != 0; |
75 | hp->rd = (_res.options & RES_RECURSE) != 0; | |
76 | hp->rcode = NOERROR; | |
5e95d9b7 RC |
77 | cp = buf + sizeof(HEADER); |
78 | buflen -= sizeof(HEADER); | |
79 | dpp = dnptrs; | |
80 | *dpp++ = buf; | |
81 | *dpp++ = NULL; | |
36534519 | 82 | lastdnptr = dnptrs + sizeof(dnptrs)/sizeof(dnptrs[0]); |
5e95d9b7 RC |
83 | /* |
84 | * perform opcode specific processing | |
85 | */ | |
86 | switch (op) { | |
87 | case QUERY: | |
43c7d2d3 JB |
88 | if ((buflen -= QFIXEDSZ) < 0) |
89 | return(-1); | |
24fac7d8 KB |
90 | if ((n = dn_comp((u_char *)dname, (u_char *)cp, buflen, |
91 | (u_char **)dnptrs, (u_char **)lastdnptr)) < 0) | |
5e95d9b7 RC |
92 | return (-1); |
93 | cp += n; | |
94 | buflen -= n; | |
16dfe61e | 95 | __putshort(type, (u_char *)cp); |
882ceeb2 | 96 | cp += sizeof(u_int16_t); |
16dfe61e | 97 | __putshort(class, (u_char *)cp); |
882ceeb2 | 98 | cp += sizeof(u_int16_t); |
a766fb4a | 99 | hp->qdcount = htons(1); |
5e95d9b7 RC |
100 | if (op == QUERY || data == NULL) |
101 | break; | |
102 | /* | |
103 | * Make an additional record for completion domain. | |
104 | */ | |
11e57e73 | 105 | buflen -= RRFIXEDSZ; |
24fac7d8 KB |
106 | if ((n = dn_comp((u_char *)data, (u_char *)cp, buflen, |
107 | (u_char **)dnptrs, (u_char **)lastdnptr)) < 0) | |
5e95d9b7 RC |
108 | return (-1); |
109 | cp += n; | |
110 | buflen -= n; | |
16dfe61e | 111 | __putshort(T_NULL, (u_char *)cp); |
882ceeb2 | 112 | cp += sizeof(u_int16_t); |
16dfe61e | 113 | __putshort(class, (u_char *)cp); |
882ceeb2 | 114 | cp += sizeof(u_int16_t); |
16dfe61e | 115 | __putlong(0, (u_char *)cp); |
882ceeb2 | 116 | cp += sizeof(u_int32_t); |
16dfe61e | 117 | __putshort(0, (u_char *)cp); |
882ceeb2 | 118 | cp += sizeof(u_int16_t); |
a766fb4a | 119 | hp->arcount = htons(1); |
5e95d9b7 RC |
120 | break; |
121 | ||
122 | case IQUERY: | |
123 | /* | |
124 | * Initialize answer section | |
125 | */ | |
126 | if (buflen < 1 + RRFIXEDSZ + datalen) | |
127 | return (-1); | |
128 | *cp++ = '\0'; /* no domain name */ | |
16dfe61e | 129 | __putshort(type, (u_char *)cp); |
882ceeb2 | 130 | cp += sizeof(u_int16_t); |
16dfe61e | 131 | __putshort(class, (u_char *)cp); |
882ceeb2 | 132 | cp += sizeof(u_int16_t); |
16dfe61e | 133 | __putlong(0, (u_char *)cp); |
882ceeb2 | 134 | cp += sizeof(u_int32_t); |
16dfe61e | 135 | __putshort(datalen, (u_char *)cp); |
882ceeb2 | 136 | cp += sizeof(u_int16_t); |
5e95d9b7 RC |
137 | if (datalen) { |
138 | bcopy(data, cp, datalen); | |
139 | cp += datalen; | |
140 | } | |
a766fb4a | 141 | hp->ancount = htons(1); |
5e95d9b7 RC |
142 | break; |
143 | ||
3bf25746 KD |
144 | #ifdef ALLOW_UPDATES |
145 | /* | |
146 | * For UPDATEM/UPDATEMA, do UPDATED/UPDATEDA followed by UPDATEA | |
147 | * (Record to be modified is followed by its replacement in msg.) | |
148 | */ | |
5e95d9b7 | 149 | case UPDATEM: |
3bf25746 KD |
150 | case UPDATEMA: |
151 | ||
152 | case UPDATED: | |
5e95d9b7 | 153 | /* |
3bf25746 KD |
154 | * The res code for UPDATED and UPDATEDA is the same; user |
155 | * calls them differently: specifies data for UPDATED; server | |
156 | * ignores data if specified for UPDATEDA. | |
5e95d9b7 | 157 | */ |
3bf25746 | 158 | case UPDATEDA: |
5e95d9b7 RC |
159 | buflen -= RRFIXEDSZ + datalen; |
160 | if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0) | |
161 | return (-1); | |
162 | cp += n; | |
371d3c9b | 163 | __putshort(type, cp); |
882ceeb2 | 164 | cp += sizeof(u_int16_t); |
371d3c9b | 165 | __putshort(class, cp); |
882ceeb2 | 166 | cp += sizeof(u_int16_t); |
371d3c9b | 167 | __putlong(0, cp); |
882ceeb2 | 168 | cp += sizeof(u_int32_t); |
371d3c9b | 169 | __putshort(datalen, cp); |
882ceeb2 | 170 | cp += sizeof(u_int16_t); |
5e95d9b7 RC |
171 | if (datalen) { |
172 | bcopy(data, cp, datalen); | |
173 | cp += datalen; | |
174 | } | |
3bf25746 KD |
175 | if ( (op == UPDATED) || (op == UPDATEDA) ) { |
176 | hp->ancount = htons(0); | |
177 | break; | |
178 | } | |
179 | /* Else UPDATEM/UPDATEMA, so drop into code for UPDATEA */ | |
5e95d9b7 | 180 | |
3bf25746 KD |
181 | case UPDATEA: /* Add new resource record */ |
182 | buflen -= RRFIXEDSZ + datalen; | |
5e95d9b7 RC |
183 | if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0) |
184 | return (-1); | |
185 | cp += n; | |
371d3c9b | 186 | __putshort(newrr->r_type, cp); |
882ceeb2 | 187 | cp += sizeof(u_int16_t); |
371d3c9b | 188 | __putshort(newrr->r_class, cp); |
882ceeb2 | 189 | cp += sizeof(u_int16_t); |
371d3c9b | 190 | __putlong(0, cp); |
882ceeb2 | 191 | cp += sizeof(u_int32_t); |
371d3c9b | 192 | __putshort(newrr->r_size, cp); |
882ceeb2 | 193 | cp += sizeof(u_int16_t); |
5e95d9b7 RC |
194 | if (newrr->r_size) { |
195 | bcopy(newrr->r_data, cp, newrr->r_size); | |
196 | cp += newrr->r_size; | |
197 | } | |
3bf25746 | 198 | hp->ancount = htons(0); |
5e95d9b7 | 199 | break; |
3bf25746 | 200 | |
882ceeb2 | 201 | #endif /* ALLOW_UPDATES */ |
5e95d9b7 RC |
202 | } |
203 | return (cp - buf); | |
204 | } |