| 1 |
158 |
chris |
#if !defined(__rtems__)
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| 2 |
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#if !defined(lint) && !defined(SABER)
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208 |
chris |
static char rcsid[] = "$Id: res_update.c,v 1.2 2001-09-27 12:01:53 chris Exp $";
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158 |
chris |
#endif /* not lint */
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| 5 |
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#endif /* not rtems */
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/*
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| 8 |
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* Copyright (c) 1996 by Internet Software Consortium.
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| 9 |
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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| 16 |
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 18 |
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 21 |
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* SOFTWARE.
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| 22 |
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*/
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| 23 |
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| 24 |
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/*
|
| 25 |
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* Based on the Dynamic DNS reference implementation by Viraj Bais
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| 26 |
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* <viraj_bais@ccm.fm.intel.com>
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| 27 |
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*/
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| 28 |
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| 29 |
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#include <sys/param.h>
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| 30 |
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#include <sys/socket.h>
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| 31 |
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#include <sys/time.h>
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| 32 |
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#include <netinet/in.h>
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| 33 |
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#include <arpa/inet.h>
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| 34 |
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#include <arpa/nameser.h>
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| 35 |
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#include <errno.h>
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| 36 |
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#include <limits.h>
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| 37 |
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#include <netdb.h>
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| 38 |
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#include <resolv.h>
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| 39 |
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#include <stdio.h>
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| 40 |
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#include <stdlib.h>
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| 41 |
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#include <string.h>
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| 42 |
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| 43 |
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/*
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| 44 |
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* Separate a linked list of records into groups so that all records
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| 45 |
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* in a group will belong to a single zone on the nameserver.
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| 46 |
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* Create a dynamic update packet for each zone and send it to the
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| 47 |
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* nameservers for that zone, and await answer.
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| 48 |
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* Abort if error occurs in updating any zone.
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| 49 |
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* Return the number of zones updated on success, < 0 on error.
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| 50 |
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*
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| 51 |
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* On error, caller must deal with the unsynchronized zones
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| 52 |
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* eg. an A record might have been successfully added to the forward
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| 53 |
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* zone but the corresponding PTR record would be missing if error
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| 54 |
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* was encountered while updating the reverse zone.
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| 55 |
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*/
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| 56 |
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| 57 |
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#define NSMAX 16
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| 58 |
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| 59 |
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struct ns1 {
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| 60 |
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char nsname[MAXDNAME];
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| 61 |
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struct in_addr nsaddr1;
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| 62 |
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};
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| 63 |
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| 64 |
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struct zonegrp {
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| 65 |
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char z_origin[MAXDNAME];
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| 66 |
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int16_t z_class;
|
| 67 |
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char z_soardata[MAXDNAME + 5 * INT32SZ];
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| 68 |
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struct ns1 z_ns[NSMAX];
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| 69 |
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int z_nscount;
|
| 70 |
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ns_updrec * z_rr;
|
| 71 |
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struct zonegrp *z_next;
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| 72 |
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};
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| 73 |
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|
| 74 |
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| 75 |
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int
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| 76 |
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res_update(ns_updrec *rrecp_in) {
|
| 77 |
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ns_updrec *rrecp, *tmprrecp;
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| 78 |
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u_char buf[PACKETSZ], answer[PACKETSZ], packet[2*PACKETSZ];
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| 79 |
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char name[MAXDNAME], zname[MAXDNAME], primary[MAXDNAME],
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| 80 |
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mailaddr[MAXDNAME];
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| 81 |
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u_char soardata[2*MAXCDNAME+5*INT32SZ];
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| 82 |
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char *dname, *svdname, *cp1, *target;
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| 83 |
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u_char *cp, *eom;
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| 84 |
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HEADER *hp = (HEADER *) answer;
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| 85 |
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struct zonegrp *zptr = NULL, *tmpzptr, *prevzptr, *zgrp_start = NULL;
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| 86 |
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int i, j, k = 0, n, ancount, nscount, arcount, rcode, rdatasize,
|
| 87 |
|
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newgroup, done, myzone, seen_before, numzones = 0;
|
| 88 |
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u_int16_t dlen, class, qclass, type, qtype;
|
| 89 |
|
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u_int32_t ttl;
|
| 90 |
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|
|
| 91 |
|
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if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
|
| 92 |
|
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h_errno = NETDB_INTERNAL;
|
| 93 |
|
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return (-1);
|
| 94 |
|
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}
|
| 95 |
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|
| 96 |
|
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for (rrecp = rrecp_in; rrecp; rrecp = rrecp->r_next) {
|
| 97 |
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dname = rrecp->r_dname;
|
| 98 |
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n = strlen(dname);
|
| 99 |
|
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if (dname[n-1] == '.')
|
| 100 |
|
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dname[n-1] = '\0';
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| 101 |
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qtype = T_SOA;
|
| 102 |
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qclass = rrecp->r_class;
|
| 103 |
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done = 0;
|
| 104 |
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seen_before = 0;
|
| 105 |
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|
| 106 |
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while (!done && dname) {
|
| 107 |
|
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if (qtype == T_SOA) {
|
| 108 |
|
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for (tmpzptr = zgrp_start;
|
| 109 |
|
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tmpzptr && !seen_before;
|
| 110 |
|
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tmpzptr = tmpzptr->z_next) {
|
| 111 |
|
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if (strcasecmp(dname,
|
| 112 |
|
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tmpzptr->z_origin) == 0 &&
|
| 113 |
|
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tmpzptr->z_class == qclass)
|
| 114 |
|
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seen_before++;
|
| 115 |
|
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for (tmprrecp = tmpzptr->z_rr;
|
| 116 |
|
|
tmprrecp && !seen_before;
|
| 117 |
|
|
tmprrecp = tmprrecp->r_grpnext)
|
| 118 |
|
|
if (strcasecmp(dname, tmprrecp->r_dname) == 0
|
| 119 |
|
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&& tmprrecp->r_class == qclass) {
|
| 120 |
|
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seen_before++;
|
| 121 |
|
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break;
|
| 122 |
|
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}
|
| 123 |
|
|
if (seen_before) {
|
| 124 |
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/*
|
| 125 |
|
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* Append to the end of
|
| 126 |
|
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* current group.
|
| 127 |
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*/
|
| 128 |
|
|
for (tmprrecp = tmpzptr->z_rr;
|
| 129 |
|
|
tmprrecp->r_grpnext;
|
| 130 |
|
|
tmprrecp = tmprrecp->r_grpnext)
|
| 131 |
|
|
(void)NULL;
|
| 132 |
|
|
tmprrecp->r_grpnext = rrecp;
|
| 133 |
|
|
rrecp->r_grpnext = NULL;
|
| 134 |
|
|
done = 1;
|
| 135 |
|
|
break;
|
| 136 |
|
|
}
|
| 137 |
|
|
}
|
| 138 |
|
|
} else if (qtype == T_A) {
|
| 139 |
|
|
for (tmpzptr = zgrp_start;
|
| 140 |
|
|
tmpzptr && !done;
|
| 141 |
|
|
tmpzptr = tmpzptr->z_next)
|
| 142 |
|
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for (i = 0; i < tmpzptr->z_nscount; i++)
|
| 143 |
|
|
if (tmpzptr->z_class == qclass &&
|
| 144 |
|
|
strcasecmp(tmpzptr->z_ns[i].nsname,
|
| 145 |
|
|
dname) == 0 &&
|
| 146 |
|
|
tmpzptr->z_ns[i].nsaddr1.s_addr != 0) {
|
| 147 |
|
|
zptr->z_ns[k].nsaddr1.s_addr =
|
| 148 |
|
|
tmpzptr->z_ns[i].nsaddr1.s_addr;
|
| 149 |
|
|
done = 1;
|
| 150 |
|
|
break;
|
| 151 |
|
|
}
|
| 152 |
|
|
}
|
| 153 |
|
|
if (done)
|
| 154 |
|
|
break;
|
| 155 |
|
|
n = res_mkquery(QUERY, dname, qclass, qtype, NULL,
|
| 156 |
|
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0, NULL, buf, sizeof buf);
|
| 157 |
|
|
if (n <= 0) {
|
| 158 |
|
|
fprintf(stderr, "res_update: mkquery failed\n");
|
| 159 |
|
|
return (n);
|
| 160 |
|
|
}
|
| 161 |
|
|
n = res_send(buf, n, answer, sizeof answer);
|
| 162 |
|
|
if (n < 0) {
|
| 163 |
|
|
fprintf(stderr, "res_update: send error for %s\n",
|
| 164 |
|
|
rrecp->r_dname);
|
| 165 |
|
|
return (n);
|
| 166 |
|
|
}
|
| 167 |
|
|
if (n < HFIXEDSZ)
|
| 168 |
|
|
return (-1);
|
| 169 |
|
|
ancount = ntohs(hp->ancount);
|
| 170 |
|
|
nscount = ntohs(hp->nscount);
|
| 171 |
|
|
arcount = ntohs(hp->arcount);
|
| 172 |
|
|
rcode = hp->rcode;
|
| 173 |
|
|
cp = answer + HFIXEDSZ;
|
| 174 |
|
|
eom = answer + n;
|
| 175 |
|
|
/* skip the question section */
|
| 176 |
|
|
n = dn_skipname(cp, eom);
|
| 177 |
|
|
if (n < 0 || cp + n + 2 * INT16SZ > eom)
|
| 178 |
|
|
return (-1);
|
| 179 |
|
|
cp += n + 2 * INT16SZ;
|
| 180 |
|
|
|
| 181 |
|
|
if (qtype == T_SOA) {
|
| 182 |
|
|
if (ancount == 0 && nscount == 0 && arcount == 0) {
|
| 183 |
|
|
/*
|
| 184 |
|
|
* if (rcode == NOERROR) then the dname exists but
|
| 185 |
|
|
* has no soa record associated with it.
|
| 186 |
|
|
* if (rcode == NXDOMAIN) then the dname does not
|
| 187 |
|
|
* exist and the server is replying out of NCACHE.
|
| 188 |
|
|
* in either case, proceed with the next try
|
| 189 |
|
|
*/
|
| 190 |
|
|
dname = strchr(dname, '.');
|
| 191 |
|
|
if (dname != NULL)
|
| 192 |
|
|
dname++;
|
| 193 |
|
|
continue;
|
| 194 |
|
|
} else if ((rcode == NOERROR || rcode == NXDOMAIN) &&
|
| 195 |
|
|
ancount == 0 &&
|
| 196 |
|
|
nscount == 1 && arcount == 0) {
|
| 197 |
|
|
/*
|
| 198 |
|
|
* name/data does not exist, soa record supplied in the
|
| 199 |
|
|
* authority section
|
| 200 |
|
|
*/
|
| 201 |
|
|
/* authority section must contain the soa record */
|
| 202 |
|
|
if ((n = dn_expand(answer, eom, cp, zname,
|
| 203 |
|
|
sizeof zname)) < 0)
|
| 204 |
|
|
return (n);
|
| 205 |
|
|
cp += n;
|
| 206 |
|
|
if (cp + 2 * INT16SZ > eom)
|
| 207 |
|
|
return (-1);
|
| 208 |
|
|
GETSHORT(type, cp);
|
| 209 |
|
|
GETSHORT(class, cp);
|
| 210 |
|
|
if (type != T_SOA || class != qclass) {
|
| 211 |
|
|
fprintf(stderr, "unknown answer\n");
|
| 212 |
|
|
return (-1);
|
| 213 |
|
|
}
|
| 214 |
|
|
myzone = 0;
|
| 215 |
|
|
svdname = dname;
|
| 216 |
|
|
while (dname)
|
| 217 |
|
|
if (strcasecmp(dname, zname) == 0) {
|
| 218 |
|
|
myzone = 1;
|
| 219 |
|
|
break;
|
| 220 |
|
|
} else if ((dname = strchr(dname, '.')) != NULL)
|
| 221 |
|
|
dname++;
|
| 222 |
|
|
if (!myzone) {
|
| 223 |
|
|
dname = strchr(svdname, '.');
|
| 224 |
|
|
if (dname != NULL)
|
| 225 |
|
|
dname++;
|
| 226 |
|
|
continue;
|
| 227 |
|
|
}
|
| 228 |
|
|
nscount = 0;
|
| 229 |
|
|
/* fallthrough */
|
| 230 |
|
|
} else if (rcode == NOERROR && ancount == 1) {
|
| 231 |
|
|
/*
|
| 232 |
|
|
* found the zone name
|
| 233 |
|
|
* new servers will supply NS records for the zone
|
| 234 |
|
|
* in authority section and A records for those
|
| 235 |
|
|
* nameservers in the additional section
|
| 236 |
|
|
* older servers have to be explicitly queried for
|
| 237 |
|
|
* NS records for the zone
|
| 238 |
|
|
*/
|
| 239 |
|
|
/* answer section must contain the soa record */
|
| 240 |
|
|
if ((n = dn_expand(answer, eom, cp, zname,
|
| 241 |
|
|
sizeof zname)) < 0)
|
| 242 |
|
|
return (n);
|
| 243 |
|
|
else
|
| 244 |
|
|
cp += n;
|
| 245 |
|
|
if (cp + 2 * INT16SZ > eom)
|
| 246 |
|
|
return (-1);
|
| 247 |
|
|
GETSHORT(type, cp);
|
| 248 |
|
|
GETSHORT(class, cp);
|
| 249 |
|
|
if (type == T_CNAME) {
|
| 250 |
|
|
dname = strchr(dname, '.');
|
| 251 |
|
|
if (dname != NULL)
|
| 252 |
|
|
dname++;
|
| 253 |
|
|
continue;
|
| 254 |
|
|
}
|
| 255 |
|
|
if (strcasecmp(dname, zname) != 0 ||
|
| 256 |
|
|
type != T_SOA ||
|
| 257 |
|
|
class != rrecp->r_class) {
|
| 258 |
|
|
fprintf(stderr, "unknown answer\n");
|
| 259 |
|
|
return (-1);
|
| 260 |
|
|
}
|
| 261 |
|
|
/* FALLTHROUGH */
|
| 262 |
|
|
} else {
|
| 263 |
|
|
fprintf(stderr,
|
| 264 |
|
|
"unknown response: ans=%d, auth=%d, add=%d, rcode=%d\n",
|
| 265 |
|
|
ancount, nscount, arcount, hp->rcode);
|
| 266 |
|
|
return (-1);
|
| 267 |
|
|
}
|
| 268 |
|
|
if (cp + INT32SZ + INT16SZ > eom)
|
| 269 |
|
|
return (-1);
|
| 270 |
|
|
/* continue processing the soa record */
|
| 271 |
|
|
GETLONG(ttl, cp);
|
| 272 |
|
|
GETSHORT(dlen, cp);
|
| 273 |
|
|
if (cp + dlen > eom)
|
| 274 |
|
|
return (-1);
|
| 275 |
|
|
newgroup = 1;
|
| 276 |
|
|
zptr = zgrp_start;
|
| 277 |
|
|
prevzptr = NULL;
|
| 278 |
|
|
while (zptr) {
|
| 279 |
|
|
if (strcasecmp(zname, zptr->z_origin) == 0 &&
|
| 280 |
|
|
type == T_SOA && class == qclass) {
|
| 281 |
|
|
newgroup = 0;
|
| 282 |
|
|
break;
|
| 283 |
|
|
}
|
| 284 |
|
|
prevzptr = zptr;
|
| 285 |
|
|
zptr = zptr->z_next;
|
| 286 |
|
|
}
|
| 287 |
|
|
if (!newgroup) {
|
| 288 |
|
|
for (tmprrecp = zptr->z_rr;
|
| 289 |
|
|
tmprrecp->r_grpnext;
|
| 290 |
|
|
tmprrecp = tmprrecp->r_grpnext)
|
| 291 |
|
|
;
|
| 292 |
|
|
tmprrecp->r_grpnext = rrecp;
|
| 293 |
|
|
rrecp->r_grpnext = NULL;
|
| 294 |
|
|
done = 1;
|
| 295 |
|
|
cp += dlen;
|
| 296 |
|
|
break;
|
| 297 |
|
|
} else {
|
| 298 |
|
|
if ((n = dn_expand(answer, eom, cp, primary,
|
| 299 |
|
|
sizeof primary)) < 0)
|
| 300 |
|
|
return (n);
|
| 301 |
|
|
cp += n;
|
| 302 |
|
|
/*
|
| 303 |
|
|
* We don't have to bounds check here because the
|
| 304 |
|
|
* next use of 'cp' is in dn_expand().
|
| 305 |
|
|
*/
|
| 306 |
|
|
cp1 = (char *)soardata;
|
| 307 |
|
|
strcpy(cp1, primary);
|
| 308 |
|
|
cp1 += strlen(cp1) + 1;
|
| 309 |
|
|
if ((n = dn_expand(answer, eom, cp, mailaddr,
|
| 310 |
|
|
sizeof mailaddr)) < 0)
|
| 311 |
|
|
return (n);
|
| 312 |
|
|
cp += n;
|
| 313 |
|
|
strcpy(cp1, mailaddr);
|
| 314 |
|
|
cp1 += strlen(cp1) + 1;
|
| 315 |
|
|
if (cp + 5*INT32SZ > eom)
|
| 316 |
|
|
return (-1);
|
| 317 |
|
|
memcpy(cp1, cp, 5*INT32SZ);
|
| 318 |
|
|
cp += 5*INT32SZ;
|
| 319 |
|
|
cp1 += 5*INT32SZ;
|
| 320 |
|
|
rdatasize = (u_char *)cp1 - soardata;
|
| 321 |
|
|
zptr = calloc(1, sizeof(struct zonegrp));
|
| 322 |
|
|
if (zptr == NULL)
|
| 323 |
|
|
return (-1);
|
| 324 |
|
|
if (zgrp_start == NULL)
|
| 325 |
|
|
zgrp_start = zptr;
|
| 326 |
|
|
else
|
| 327 |
|
|
prevzptr->z_next = zptr;
|
| 328 |
|
|
zptr->z_rr = rrecp;
|
| 329 |
|
|
rrecp->r_grpnext = NULL;
|
| 330 |
|
|
strcpy(zptr->z_origin, zname);
|
| 331 |
|
|
zptr->z_class = class;
|
| 332 |
|
|
memcpy(zptr->z_soardata, soardata, rdatasize);
|
| 333 |
|
|
/* fallthrough to process NS and A records */
|
| 334 |
|
|
}
|
| 335 |
|
|
} else if (qtype == T_NS) {
|
| 336 |
|
|
if (rcode == NOERROR && ancount > 0) {
|
| 337 |
|
|
strcpy(zname, dname);
|
| 338 |
|
|
for (zptr = zgrp_start; zptr; zptr = zptr->z_next) {
|
| 339 |
|
|
if (strcasecmp(zname, zptr->z_origin) == 0)
|
| 340 |
|
|
break;
|
| 341 |
|
|
}
|
| 342 |
|
|
if (zptr == NULL)
|
| 343 |
|
|
/* should not happen */
|
| 344 |
|
|
return (-1);
|
| 345 |
|
|
if (nscount > 0) {
|
| 346 |
|
|
/*
|
| 347 |
|
|
* answer and authority sections contain
|
| 348 |
|
|
* the same information, skip answer section
|
| 349 |
|
|
*/
|
| 350 |
|
|
for (j = 0; j < ancount; j++) {
|
| 351 |
|
|
n = dn_skipname(cp, eom);
|
| 352 |
|
|
if (n < 0)
|
| 353 |
|
|
return (-1);
|
| 354 |
|
|
n += 2*INT16SZ + INT32SZ;
|
| 355 |
|
|
if (cp + n + INT16SZ > eom)
|
| 356 |
|
|
return (-1);
|
| 357 |
|
|
cp += n;
|
| 358 |
|
|
GETSHORT(dlen, cp);
|
| 359 |
|
|
cp += dlen;
|
| 360 |
|
|
}
|
| 361 |
|
|
} else
|
| 362 |
|
|
nscount = ancount;
|
| 363 |
|
|
/* fallthrough to process NS and A records */
|
| 364 |
|
|
} else {
|
| 365 |
|
|
fprintf(stderr, "cannot determine nameservers for %s:\
|
| 366 |
|
|
ans=%d, auth=%d, add=%d, rcode=%d\n",
|
| 367 |
|
|
dname, ancount, nscount, arcount, hp->rcode);
|
| 368 |
|
|
return (-1);
|
| 369 |
|
|
}
|
| 370 |
|
|
} else if (qtype == T_A) {
|
| 371 |
|
|
if (rcode == NOERROR && ancount > 0) {
|
| 372 |
|
|
arcount = ancount;
|
| 373 |
|
|
ancount = nscount = 0;
|
| 374 |
|
|
/* fallthrough to process A records */
|
| 375 |
|
|
} else {
|
| 376 |
|
|
fprintf(stderr, "cannot determine address for %s:\
|
| 377 |
|
|
ans=%d, auth=%d, add=%d, rcode=%d\n",
|
| 378 |
|
|
dname, ancount, nscount, arcount, hp->rcode);
|
| 379 |
|
|
return (-1);
|
| 380 |
|
|
}
|
| 381 |
|
|
}
|
| 382 |
|
|
/* process NS records for the zone */
|
| 383 |
|
|
j = 0;
|
| 384 |
|
|
for (i = 0; i < nscount; i++) {
|
| 385 |
|
|
if ((n = dn_expand(answer, eom, cp, name,
|
| 386 |
|
|
sizeof name)) < 0)
|
| 387 |
|
|
return (n);
|
| 388 |
|
|
cp += n;
|
| 389 |
|
|
if (cp + 3 * INT16SZ + INT32SZ > eom)
|
| 390 |
|
|
return (-1);
|
| 391 |
|
|
GETSHORT(type, cp);
|
| 392 |
|
|
GETSHORT(class, cp);
|
| 393 |
|
|
GETLONG(ttl, cp);
|
| 394 |
|
|
GETSHORT(dlen, cp);
|
| 395 |
|
|
if (cp + dlen > eom)
|
| 396 |
|
|
return (-1);
|
| 397 |
|
|
if (strcasecmp(name, zname) == 0 &&
|
| 398 |
|
|
type == T_NS && class == qclass) {
|
| 399 |
|
|
if ((n = dn_expand(answer, eom, cp,
|
| 400 |
|
|
name, sizeof name)) < 0)
|
| 401 |
|
|
return (n);
|
| 402 |
|
|
target = zptr->z_ns[j++].nsname;
|
| 403 |
|
|
strcpy(target, name);
|
| 404 |
|
|
}
|
| 405 |
|
|
cp += dlen;
|
| 406 |
|
|
}
|
| 407 |
|
|
if (zptr->z_nscount == 0)
|
| 408 |
|
|
zptr->z_nscount = j;
|
| 409 |
|
|
/* get addresses for the nameservers */
|
| 410 |
|
|
for (i = 0; i < arcount; i++) {
|
| 411 |
|
|
if ((n = dn_expand(answer, eom, cp, name,
|
| 412 |
|
|
sizeof name)) < 0)
|
| 413 |
|
|
return (n);
|
| 414 |
|
|
cp += n;
|
| 415 |
|
|
if (cp + 3 * INT16SZ + INT32SZ > eom)
|
| 416 |
|
|
return (-1);
|
| 417 |
|
|
GETSHORT(type, cp);
|
| 418 |
|
|
GETSHORT(class, cp);
|
| 419 |
|
|
GETLONG(ttl, cp);
|
| 420 |
|
|
GETSHORT(dlen, cp);
|
| 421 |
|
|
if (cp + dlen > eom)
|
| 422 |
|
|
return (-1);
|
| 423 |
|
|
if (type == T_A && dlen == INT32SZ && class == qclass) {
|
| 424 |
|
|
for (j = 0; j < zptr->z_nscount; j++)
|
| 425 |
|
|
if (strcasecmp(name, zptr->z_ns[j].nsname) == 0) {
|
| 426 |
|
|
memcpy(&zptr->z_ns[j].nsaddr1.s_addr, cp,
|
| 427 |
|
|
INT32SZ);
|
| 428 |
|
|
break;
|
| 429 |
|
|
}
|
| 430 |
|
|
}
|
| 431 |
|
|
cp += dlen;
|
| 432 |
|
|
}
|
| 433 |
|
|
if (zptr->z_nscount == 0) {
|
| 434 |
|
|
dname = zname;
|
| 435 |
|
|
qtype = T_NS;
|
| 436 |
|
|
continue;
|
| 437 |
|
|
}
|
| 438 |
|
|
done = 1;
|
| 439 |
|
|
for (k = 0; k < zptr->z_nscount; k++)
|
| 440 |
|
|
if (zptr->z_ns[k].nsaddr1.s_addr == 0) {
|
| 441 |
|
|
done = 0;
|
| 442 |
|
|
dname = zptr->z_ns[k].nsname;
|
| 443 |
|
|
qtype = T_A;
|
| 444 |
|
|
}
|
| 445 |
|
|
|
| 446 |
|
|
} /* while */
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
_res.options |= RES_DEBUG;
|
| 450 |
|
|
for (zptr = zgrp_start; zptr; zptr = zptr->z_next) {
|
| 451 |
|
|
|
| 452 |
|
|
/* append zone section */
|
| 453 |
|
|
rrecp = res_mkupdrec(ns_s_zn, zptr->z_origin,
|
| 454 |
|
|
zptr->z_class, ns_t_soa, 0);
|
| 455 |
|
|
if (rrecp == NULL) {
|
| 456 |
|
|
fprintf(stderr, "saverrec error\n");
|
| 457 |
|
|
fflush(stderr);
|
| 458 |
|
|
return (-1);
|
| 459 |
|
|
}
|
| 460 |
|
|
rrecp->r_grpnext = zptr->z_rr;
|
| 461 |
|
|
zptr->z_rr = rrecp;
|
| 462 |
|
|
|
| 463 |
|
|
n = res_mkupdate(zptr->z_rr, packet, sizeof packet);
|
| 464 |
|
|
if (n < 0) {
|
| 465 |
|
|
fprintf(stderr, "res_mkupdate error\n");
|
| 466 |
|
|
fflush(stderr);
|
| 467 |
|
|
return (-1);
|
| 468 |
|
|
} else
|
| 469 |
|
|
fprintf(stdout, "res_mkupdate: packet size = %d\n", n);
|
| 470 |
|
|
|
| 471 |
|
|
/*
|
| 472 |
|
|
* Override the list of NS records from res_init() with
|
| 473 |
|
|
* the authoritative nameservers for the zone being updated.
|
| 474 |
|
|
* Sort primary to be the first in the list of nameservers.
|
| 475 |
|
|
*/
|
| 476 |
|
|
for (i = 0; i < zptr->z_nscount; i++) {
|
| 477 |
|
|
if (strcasecmp(zptr->z_ns[i].nsname,
|
| 478 |
|
|
zptr->z_soardata) == 0) {
|
| 479 |
|
|
struct in_addr tmpaddr;
|
| 480 |
|
|
|
| 481 |
|
|
if (i != 0) {
|
| 482 |
|
|
strcpy(zptr->z_ns[i].nsname,
|
| 483 |
|
|
zptr->z_ns[0].nsname);
|
| 484 |
|
|
strcpy(zptr->z_ns[0].nsname,
|
| 485 |
|
|
zptr->z_soardata);
|
| 486 |
|
|
tmpaddr = zptr->z_ns[i].nsaddr1;
|
| 487 |
|
|
zptr->z_ns[i].nsaddr1 =
|
| 488 |
|
|
zptr->z_ns[0].nsaddr1;
|
| 489 |
|
|
zptr->z_ns[0].nsaddr1 = tmpaddr;
|
| 490 |
|
|
}
|
| 491 |
|
|
break;
|
| 492 |
|
|
}
|
| 493 |
|
|
}
|
| 494 |
|
|
for (i = 0; i < MAXNS; i++) {
|
| 495 |
|
|
_res.nsaddr_list[i].sin_addr = zptr->z_ns[i].nsaddr1;
|
| 496 |
|
|
_res.nsaddr_list[i].sin_family = AF_INET;
|
| 497 |
|
|
_res.nsaddr_list[i].sin_port = htons(NAMESERVER_PORT);
|
| 498 |
|
|
}
|
| 499 |
|
|
_res.nscount = (zptr->z_nscount < MAXNS) ?
|
| 500 |
|
|
zptr->z_nscount : MAXNS;
|
| 501 |
|
|
n = res_send(packet, n, answer, sizeof(answer));
|
| 502 |
|
|
if (n < 0) {
|
| 503 |
|
|
fprintf(stderr, "res_send: send error, n=%d\n", n);
|
| 504 |
|
|
break;
|
| 505 |
|
|
} else
|
| 506 |
|
|
numzones++;
|
| 507 |
|
|
}
|
| 508 |
|
|
|
| 509 |
|
|
/* free malloc'ed memory */
|
| 510 |
|
|
while(zgrp_start) {
|
| 511 |
|
|
zptr = zgrp_start;
|
| 512 |
|
|
zgrp_start = zgrp_start->z_next;
|
| 513 |
|
|
res_freeupdrec(zptr->z_rr); /* Zone section we allocated. */
|
| 514 |
|
|
free((char *)zptr);
|
| 515 |
|
|
}
|
| 516 |
|
|
|
| 517 |
|
|
return (numzones);
|
| 518 |
|
|
}
|
