2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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15 * This product includes software developed by the University of
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
37 * Permission to use, copy, modify, and distribute this software for any
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40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
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49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
55 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
57 * Permission to use, copy, modify, and distribute this software for any
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62 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
63 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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65 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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67 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
71 #if defined(LIBC_SCCS) && !defined(lint)
72 static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
73 static const char rcsid[] = "$Id: res_mkquery.c,v 1.4 2001/01/16 22:33:14 mellon Exp $";
74 #endif /* LIBC_SCCS and not lint */
76 #include <sys/types.h>
77 #include <sys/param.h>
78 #include <netinet/in.h>
82 #include <sys/socket.h>
84 #include "minires/minires.h"
85 #include "arpa/nameser.h"
87 extern const char *_res_opcodes[];
90 * Form all types of queries.
91 * Returns the size of the result or -1.
94 res_nmkquery(res_state statp,
95 int op, /* opcode of query */
96 const char *dname, /* domain name */
97 ns_class class, ns_type type, /* class and type of query */
98 const u_char *data, /* resource record data */
99 unsigned datalen, /* length of data */
100 const u_char *newrr_in, /* new rr for modify or append */
101 double *buf, /* buffer to put query */
102 unsigned buflen, /* size of buffer */
103 unsigned *rbuflen) /* returned size of buffer */
108 u_char *dnptrs[20], **dpp, **lastdnptr;
111 * Initialize header fields.
113 if ((buf == NULL) || (buflen < HFIXEDSZ))
114 return ISC_R_INVALIDARG;
115 memset(buf, 0, HFIXEDSZ);
117 hp->id = htons(++statp->id);
119 hp->rd = (statp->options & RES_RECURSE) != 0;
121 cp = ((u_char *)buf) + HFIXEDSZ;
124 *dpp++ = (u_char *)buf;
126 lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
128 * perform opcode specific processing
131 case QUERY: /*FALLTHROUGH*/
133 if ((buflen -= QFIXEDSZ) < 0)
134 return ISC_R_NOSPACE;
135 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
136 return ISC_R_NOSPACE;
141 putUShort(cp, class);
143 hp->qdcount = htons(1);
144 if (op == QUERY || data == NULL)
147 * Make an additional record for completion domain.
150 n = dn_comp((const char *)data, cp, buflen, dnptrs, lastdnptr);
152 return ISC_R_NOSPACE;
155 putUShort(cp, T_NULL);
157 putUShort(cp, class);
163 hp->arcount = htons(1);
168 * Initialize answer section
170 if (buflen < 1 + RRFIXEDSZ + datalen)
171 return ISC_R_NOSPACE;
172 *cp++ = '\0'; /* no domain name */
175 putUShort(cp, class);
179 putUShort(cp, datalen);
182 memcpy(cp, data, datalen);
185 hp->ancount = htons(1);
189 return ISC_R_NOTIMPLEMENTED;
191 *rbuflen = cp - ((u_char *)buf);
192 return ISC_R_SUCCESS;