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- head 1.3;
- access ;
- symbols ;
- locks ; strict;
- comment @ * @;
-
-
- 1.3
- date 88.07.29.18.32.35; author ouster; state Exp;
- branches ;
- next 1.2;
-
- 1.2
- date 88.07.29.16.59.57; author ouster; state Exp;
- branches ;
- next 1.1;
-
- 1.1
- date 88.06.20.09.57.19; author ouster; state Exp;
- branches ;
- next ;
-
-
- desc
- @@
-
-
- 1.3
- log
- @Lint.
- @
- text
- @/*
- * Copyright (c) 1985 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission. This software
- * is provided ``as is'' without express or implied warranty.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@@(#)res_mkquery.c 6.7 (Berkeley) 3/7/88";
- #endif /* LIBC_SCCS and not lint */
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <arpa/nameser.h>
- #include <resolv.h>
-
- /*
- * Form all types of queries.
- * Returns the size of the result or -1.
- */
- /* ARGSUSED */
- res_mkquery(op, dname, class, type, data, datalen, newrr, buf, buflen)
- int op; /* opcode of query */
- char *dname; /* domain name */
- int class, type; /* class and type of query */
- char *data; /* resource record data */
- int datalen; /* length of data */
- struct rrec *newrr; /* new rr for modify or append */
- char *buf; /* buffer to put query */
- int buflen; /* size of buffer */
- {
- register HEADER *hp;
- register char *cp;
- register int n;
- char dnbuf[MAXDNAME];
- char *dnptrs[10], **dpp, **lastdnptr;
- extern char *index();
-
- #ifdef DEBUG
- if (_res.options & RES_DEBUG)
- printf("res_mkquery(%d, %s, %d, %d)\n", op, dname, class, type);
- #endif DEBUG
- /*
- * Initialize header fields.
- */
- hp = (HEADER *) buf;
- hp->id = htons(++_res.id);
- hp->opcode = op;
- hp->qr = hp->aa = hp->tc = hp->ra = 0;
- hp->pr = (_res.options & RES_PRIMARY) != 0;
- hp->rd = (_res.options & RES_RECURSE) != 0;
- hp->rcode = NOERROR;
- hp->qdcount = 0;
- hp->ancount = 0;
- hp->nscount = 0;
- hp->arcount = 0;
- cp = buf + sizeof(HEADER);
- buflen -= sizeof(HEADER);
- dpp = dnptrs;
- *dpp++ = buf;
- *dpp++ = NULL;
- lastdnptr = dnptrs + sizeof(dnptrs)/sizeof(dnptrs[0]);
- /*
- * If the domain name contains no dots (single label), then
- * append the default domain name to the one given.
- */
- if ((_res.options & RES_DEFNAMES) && dname != 0 && dname[0] != '\0' &&
- index(dname, '.') == NULL) {
- if (!(_res.options & RES_INIT))
- if (res_init() == -1)
- return(-1);
- if (_res.defdname[0] != '\0') {
- (void)sprintf(dnbuf, "%s.%s", dname, _res.defdname);
- dname = dnbuf;
- }
- }
- /*
- * perform opcode specific processing
- */
- switch (op) {
- case QUERY:
- buflen -= QFIXEDSZ;
- if ((n = dn_comp((u_char *) dname, (u_char *) cp, buflen,
- (u_char **) dnptrs, (u_char **) lastdnptr)) < 0)
- return (-1);
- cp += n;
- buflen -= n;
- putshort((u_short) type, (u_char *) cp);
- cp += sizeof(u_short);
- putshort((u_short) class, (u_char *) cp);
- cp += sizeof(u_short);
- hp->qdcount = htons(1);
- if (op == QUERY || data == NULL)
- break;
- /*
- * Make an additional record for completion domain.
- */
- buflen -= RRFIXEDSZ;
- if ((n = dn_comp((u_char *) data, (u_char *) cp, buflen,
- (u_char **) dnptrs, (u_char **) lastdnptr)) < 0)
- return (-1);
- cp += n;
- buflen -= n;
- putshort(T_NULL, (u_char *) cp);
- cp += sizeof(u_short);
- putshort((u_short) class, (u_char *) cp);
- cp += sizeof(u_short);
- putlong((u_long) 0, (u_char *) cp);
- cp += sizeof(u_long);
- putshort((u_short) 0, (u_char *) cp);
- cp += sizeof(u_short);
- hp->arcount = htons(1);
- break;
-
- case IQUERY:
- /*
- * Initialize answer section
- */
- if (buflen < 1 + RRFIXEDSZ + datalen)
- return (-1);
- *cp++ = '\0'; /* no domain name */
- putshort((u_short) type, (u_char *) cp);
- cp += sizeof(u_short);
- putshort((u_short) class, (u_char *) cp);
- cp += sizeof(u_short);
- putlong((u_long) 0, (u_char *) cp);
- cp += sizeof(u_long);
- putshort((u_short) datalen, (u_char *) cp);
- cp += sizeof(u_short);
- if (datalen) {
- bcopy(data, cp, datalen);
- cp += datalen;
- }
- hp->ancount = htons(1);
- break;
-
- #ifdef ALLOW_UPDATES
- /*
- * For UPDATEM/UPDATEMA, do UPDATED/UPDATEDA followed by UPDATEA
- * (Record to be modified is followed by its replacement in msg.)
- */
- case UPDATEM:
- case UPDATEMA:
-
- case UPDATED:
- /*
- * The res code for UPDATED and UPDATEDA is the same; user
- * calls them differently: specifies data for UPDATED; server
- * ignores data if specified for UPDATEDA.
- */
- case UPDATEDA:
- buflen -= RRFIXEDSZ + datalen;
- if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
- return (-1);
- cp += n;
- putshort(type, cp);
- cp += sizeof(u_short);
- putshort(class, cp);
- cp += sizeof(u_short);
- putlong(0, cp);
- cp += sizeof(u_long);
- putshort(datalen, cp);
- cp += sizeof(u_short);
- if (datalen) {
- bcopy(data, cp, datalen);
- cp += datalen;
- }
- if ( (op == UPDATED) || (op == UPDATEDA) ) {
- hp->ancount = htons(0);
- break;
- }
- /* Else UPDATEM/UPDATEMA, so drop into code for UPDATEA */
-
- case UPDATEA: /* Add new resource record */
- buflen -= RRFIXEDSZ + datalen;
- if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
- return (-1);
- cp += n;
- putshort(newrr->r_type, cp);
- cp += sizeof(u_short);
- putshort(newrr->r_class, cp);
- cp += sizeof(u_short);
- putlong(0, cp);
- cp += sizeof(u_long);
- putshort(newrr->r_size, cp);
- cp += sizeof(u_short);
- if (newrr->r_size) {
- bcopy(newrr->r_data, cp, newrr->r_size);
- cp += newrr->r_size;
- }
- hp->ancount = htons(0);
- break;
-
- #endif ALLOW_UPDATES
- }
- return (cp - buf);
- }
- @
-
-
- 1.2
- log
- @Lint.
- @
- text
- @d134 1
- a134 1
- putshort(datalen, cp);
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d27 1
- d89 2
- a90 1
- if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
- d94 1
- a94 1
- putshort(type, cp);
- d96 1
- a96 1
- putshort(class, cp);
- d105 2
- a106 1
- if ((n = dn_comp(data, cp, buflen, dnptrs, lastdnptr)) < 0)
- d110 1
- a110 1
- putshort(T_NULL, cp);
- d112 1
- a112 1
- putshort(class, cp);
- d114 1
- a114 1
- putlong(0, cp);
- d116 1
- a116 1
- putshort(0, cp);
- d128 1
- a128 1
- putshort(type, cp);
- d130 1
- a130 1
- putshort(class, cp);
- d132 1
- a132 1
- putlong(0, cp);
- @
-