diff options
Diffstat (limited to 'contrib/bind/named/db_update.c')
| -rw-r--r-- | contrib/bind/named/db_update.c | 815 |
1 files changed, 0 insertions, 815 deletions
diff --git a/contrib/bind/named/db_update.c b/contrib/bind/named/db_update.c deleted file mode 100644 index b74ac5a..0000000 --- a/contrib/bind/named/db_update.c +++ /dev/null @@ -1,815 +0,0 @@ -#if !defined(lint) && !defined(SABER) -static char sccsid[] = "@(#)db_update.c 4.28 (Berkeley) 3/21/91"; -static char rcsid[] = "$Id: db_update.c,v 8.19 1997/06/01 20:34:34 vixie Exp $"; -#endif /* not lint */ - -/* - * ++Copyright++ 1986, 1990 - * - - * Copyright (c) 1986, 1990 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - - * Portions Copyright (c) 1993 by Digital Equipment Corporation. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies, and that - * the name of Digital Equipment Corporation not be used in advertising or - * publicity pertaining to distribution of the document or software without - * specific, written prior permission. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL - * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT - * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - * - - * --Copyright-- - */ - -#include <stdio.h> -#include <syslog.h> - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <arpa/nameser.h> -#include <resolv.h> - -#include "named.h" - -/* int - * isRefByNS(name, htp) - * recurse through all of `htp' looking for NS RR's that refer to `name'. - * returns: - * nonzero if at least one such NS RR exists - * cautions: - * this is very expensive; probably you only want to use on fcachetab. - */ -static int -isRefByNS(name, htp) - char name[]; - struct hashbuf *htp; -{ - register struct namebuf *np; - register struct databuf *dp; - - for (np = htp->h_tab[0]; np != NULL; np = np->n_next) { - for (dp = np->n_data; dp != NULL; dp = dp->d_next) { - if ((dp->d_class == C_ANY || - dp->d_class == C_IN || - dp->d_class == C_HS) && - dp->d_type == T_NS && -#ifdef NCACHE - !dp->d_rcode && -#endif - !strcasecmp(name, (char *)dp->d_data)) { - return (1); - } - } - if (np->n_hash && isRefByNS(name, np->n_hash)) - return (1); - } - return (0); -} - - -/* int - * findMyZone(struct namebuf *np, int class) - * surf the zone cuts and find this zone the hard way - * return value: - * zone number or DB_Z_CACHE if it's outside a zone - * interesting cases: - * DEC.COM SOA (primary) - * CRL.DEC.COM NS (in primary) - * if you start at CRL.. here, you find the DEC.COM zone - * if you start at NS.CRL.. here, you're in the cache - * DEC.COM SOA (primary) - * CRL.DEC.COM NS (in primary) - * CRL.DEC.COM SOA (secondary) - * CRL.DEC.COM NS (in secondary) - * if you start at CRL.. here, you find the CRL.DEC.COM zone - * if you start at NS.CRL.. here, you're in the CRL.. zone - */ -int -findMyZone(np, class) - struct namebuf *np; - register int class; -{ - for (; np; np = np_parent(np)) { - register struct databuf *dp; - - /* if we encounter an SOA, we're in its zone (which can be - * the cache or an authoritative zone, depending). - */ - for (dp = np->n_data; dp; dp = dp->d_next) - if (match(dp, class, T_SOA)) - return (dp->d_zone); - - /* if we find an NS at some node without having seen an SOA - * (above), then we're out in the cache somewhere. - */ - for (dp = np->n_data; dp; dp = dp->d_next) - if (match(dp, class, T_NS)) - return (DB_Z_CACHE); - } - - /* getting all the way to the root without finding an NS or SOA - * probably means that we are in deep dip, but we'll treat it as - * being in the cache. (XXX?) - */ - return (DB_Z_CACHE); -} - - -#ifdef NO_GLUE -#define ISVALIDGLUE(xdp) ((xdp)->d_type == T_NS || (xdp)->d_type == T_A \ - || (xdp)->d_type == T_AAAA) -#else -#define ISVALIDGLUE(xdp) (1) -#endif /*NO_GLUE*/ - - -/* int - * db_update(name, odp, newdp, flags, htp) - * update data base node at `name'. `flags' controls the action. - * side effects: - * inverse query tables modified, if we're using them. - * return value: - * OK - success - * NONAME - name doesn't exist - * AUTH - you can't do that - * DATAEXISTS - there's something there and DB_NODATA was specified - * NODATA - there's no data, and (DB_DELETE or DB_MEXIST) was spec'd - * - * Policy: How to add data if one more RR is -ve data - * - * NEND NOERROR_NODATA - * NXD NXDOMAIN - * - * match - * old - * Data NEND NXD - * Data Merge Data Data - * new NEND NEND NEND NEND - * NXD NXD NXD NXD - * - * no match - * old - * Data NEND NXD - * Data Merge Merge Data - * new NEND Merge Merge NEND - * NXD NXD NXD NXD - * - */ -/* XXX: this code calls nlookup, which can create namebuf's. if this code - * has to exit with a fatal error, it should scan from the new np upward - * and for each node which has no children and no data it should remove - * the namebuf. design notes: (1) there's no harm in doing this even if - * success occurred; (2) stopping on the first nonremovable np is optimal; - * the code for removal should be taken out of remove_zone() and made - * general enough for this use, and for remove_zone()'s continued use. - * vix, 21jul94 - */ -int -db_update(name, odp, newdp, flags, htp) - char name[]; - struct databuf *odp, *newdp; - int flags; - struct hashbuf *htp; -{ - register struct databuf *dp, *pdp; - register struct namebuf *np; - int zn, isHintNS; - int check_ttl = 0; - const char *fname; - - dprintf(3, (ddt, "db_update(%s, 0x%lx, 0x%lx, 0%o, 0x%lx)%s\n", - name, (u_long)odp, (u_long)newdp, flags, (u_long)htp, - (odp && (odp->d_flags&DB_F_HINT)) ? " hint":"" )); - np = nlookup(name, &htp, &fname, newdp != NULL); - if (np == NULL || fname != name) - return (NONAME); - - if (newdp && zones[newdp->d_zone].z_type == Z_PRIMARY) - check_ttl = 1; - - /* don't let nonauthoritative updates write in authority zones */ - if (newdp && ((zn = findMyZone(np, newdp->d_class)) != DB_Z_CACHE) && -#ifdef STUBS - (zones[zn].z_type != Z_STUB) && -#endif - (flags & DB_NOTAUTH)) { - int foundRR = 0; - - /* - * Don't generate the warning if the update - * would have been harmless (identical data). - */ - for (dp = np->n_data; dp != NULL; dp = dp->d_next) { - if (!db_cmp(dp, newdp)) { - foundRR++; - break; - } - } - if (!foundRR) - dprintf(5, (ddt, - "[%s].%d update? to auth zone \"%s\" (%s)", - inet_ntoa(from_addr.sin_addr), - ntohs(from_addr.sin_port), - zones[zn].z_origin, - name)); - return (AUTH); - } - - if (newdp && zn && !(flags & DB_NOTAUTH)) { - if (db_getclev(zones[zn].z_origin) > newdp->d_clev) { - dprintf(5,(ddt, "attempted update child zone %s, %s\n", - zones[zn].z_origin, name)); - return(AUTH); - } - } - - /* some special checks for root NS' A RR's */ - isHintNS = isRefByNS(name, fcachetab); -#ifdef DEPRECATED - if (newdp && isHintNS && newdp->d_type == T_A) { - /* upgrade credibility of additional data for rootsrv addrs */ - if (newdp->d_cred == DB_C_ADDITIONAL) { - dprintf(3, (ddt, - "upgrading credibility for A RR (%s)\n", - name)); - /* XXX: should copy NS RR's, but we really just want - * to prevent deprecation later so this will do. - */ - newdp->d_cred = DB_C_ANSWER; - newdp->d_clev = 0; - } - } -#endif - - /* Reflect certain updates in hint cache also... */ - /* Don't stick data we are authoritative for in hints. */ - if (!(flags & DB_NOHINTS) && - (flags & DB_PRIMING) && - (odp != NULL) && - (htp != fcachetab) && - (odp->d_zone <= 0) && - !(odp->d_flags & DB_F_HINT) && -#ifdef NCACHE - (!newdp || !newdp->d_rcode) && -#endif - ((name[0] == '\0' && odp->d_type == T_NS) || - (odp->d_type == T_A && isHintNS) - ) - ) - { - dprintf(3, (ddt, "db_update: hint '%s' %d\n", - name, odp->d_ttl)); - dp = savedata(odp->d_class, odp->d_type, odp->d_ttl, - odp->d_data, odp->d_size); - dp->d_zone = DB_Z_CACHE; - dp->d_flags = DB_F_HINT; - dp->d_cred = DB_C_CACHE; - dp->d_clev = 0; - if (db_update(name, - dp, dp, - (flags|DB_NOHINTS), - fcachetab) - != OK) { - dprintf(3, (ddt, "db_update: hint %lx freed\n", - (u_long)dp)); - db_free(dp); - } - } - - if (odp != NULL) { - int foundRR = 0; - - pdp = NULL; - for (dp = np->n_data; dp != NULL; ) { - if (!match(dp, odp->d_class, odp->d_type)) { - /* {class,type} doesn't match. these are - * the aggregation cases. - */ - /* Check that CNAMEs are only accompanied by - * Secure DNS RR's (KEY, SIG, and NXT). - */ - if (((dp->d_type == T_CNAME && - odp->d_type != T_KEY && - odp->d_type != T_SIG && - odp->d_type != T_NXT) || - (odp->d_type == T_CNAME && - dp->d_type != T_KEY && - dp->d_type != T_SIG && - dp->d_type != T_NXT)) && - odp->d_class == dp->d_class && -#ifdef NCACHE - /* neither the odp nor the new dp are - * negatively cached records... - */ - !dp->d_rcode && - !odp->d_rcode && -#endif /*NCACHE*/ - zones[odp->d_zone].z_type != Z_CACHE) { - syslog(LOG_INFO, - "%s has CNAME and other data (invalid)\n", - name); - goto skip; - } - if (!newdp || newdp->d_class != dp->d_class) - goto skip; - - /* if the new data is authorative - * remove any data for this domain with - * the same class that isn't as credable - */ - if (newdp->d_cred == DB_C_ZONE && - newdp->d_cred > dp->d_cred) - /* better credibility and the old datum - * was not from a zone file. remove - * the old datum. - */ - goto delete; - -#if 0 /* caught by findMyZone() now. */ - /* if we have authoritative data for a - * node, don't add in other data. - */ - if (dp->d_cred == DB_C_ZONE && - newdp->d_cred < dp->d_cred) - return (AUTH); -#endif - - /* if the new data is authoritative but - * but isn't as credible, reject it. - */ - if (newdp->d_cred == DB_C_ZONE && - dp->d_cred == DB_C_ZONE) { - /* Both records are from a zone file. - * If their credibility levels differ, - * we're dealing with a zone cut. The - * record with lower clev is from the - * upper zone's file and is therefore - * glue. - */ - if (newdp->d_clev < dp->d_clev) { - if (!ISVALIDGLUE(newdp)) { - syslog(LOG_INFO, - "domain %s %s record in zone %s should be in zone %s, ignored", - name, p_type(newdp->d_type), - zones[newdp->d_zone].z_origin, - zones[dp->d_zone].z_origin); - } - return (AUTH); - } - if (newdp->d_clev > dp->d_clev) { - if (!ISVALIDGLUE(dp)) { - syslog(LOG_INFO, - "domain %s %s record in zone %s should be in zone %s, deleted", - name, p_type(dp->d_type), - zones[dp->d_zone].z_origin, - zones[newdp->d_zone].z_origin); - } - goto delete; - } - } -#ifdef NCACHE - /* process NXDOMAIN */ - /* policy */ - if (newdp->d_rcode == NXDOMAIN) { - if (dp->d_cred < DB_C_AUTH) - goto delete; - else - return (DATAEXISTS); - } - - if (dp->d_rcode == NXDOMAIN) - goto delete; - - /* process NOERROR_NODATA */ - /* NO PROCESSING REQUIRED */ -#endif /*NCACHE*/ - goto skip; - } /*if {class,type} did not match*/ - - /* {type,class} did match. this is the replace case. - */ - dprintf(5, (ddt, - "db_update: flags = %#x, sizes = %d, %d (cmp %d)\n", - flags, odp->d_size, dp->d_size, - db_cmp(dp, odp))); - if (newdp) { - dprintf(4, (ddt, - "credibility for %s is %d(%d) from [%s].%d, is %d(%d) in cache\n", - *name? name : ".", - newdp->d_cred, - newdp->d_clev, - inet_ntoa(from_addr.sin_addr), - ntohs(from_addr.sin_port), - dp->d_cred, - dp->d_clev)); - if (newdp->d_cred > dp->d_cred) { - /* better credibility. - * remove the old datum. - */ - goto delete; - } - if (newdp->d_cred < dp->d_cred) { - /* credibility is worse. ignore it. */ - return (AUTH); - } - if (newdp->d_cred == DB_C_ZONE && - dp->d_cred == DB_C_ZONE ) { - /* Both records are from a zone file. - * If their credibility levels differ, - * we're dealing with a zone cut. The - * record with lower clev is from the - * upper zone's file and is therefore - * glue. - */ - - /* XXX - Tricky situation here is you - * have 2 zones a.b.c and sub.a.b.c - * being served by the same server. - * named will send NS records for - * sub.a.b.c during zone transfer of - * a.b.c zone. If we're secondary for - * both zones, and we reload zone - * a.b.c, we'll get the NS records - * (and possibly A records to go with - * them?) for sub.a.b.c as part of the - * a.b.c zone transfer. But we've - * already got a more credible record - * from the sub.a.b.c zone. So we want - * to ignore the new record, but we - * shouldn't syslog because there's - * nothing the user can do to prevent - * the situation. Perhaps we should - * only complain when we are primary? - */ - - if (newdp->d_clev < dp->d_clev) { - if (!ISVALIDGLUE(newdp)) { - syslog(LOG_INFO, - "domain %s %s record in zone %s should be in zone %s, ignored", - name, p_type(newdp->d_type), - zones[newdp->d_zone].z_origin, - zones[dp->d_zone].z_origin); - } - return (AUTH); - } - if (newdp->d_clev > dp->d_clev) { - if (!ISVALIDGLUE(dp)) { - syslog(LOG_INFO, - "domain %s %s record in zone %s should be in zone %s, deleted", - name, p_type(dp->d_type), - zones[dp->d_zone].z_origin, - zones[newdp->d_zone].z_origin); - } - goto delete; - } - } - - /* credibility is the same. - * let it aggregate in the normal way. - */ -#ifdef NCACHE - /* - * if the new or old RR is -ve, delete old. - */ - if (dp->d_rcode || newdp->d_rcode) { - /* XXX: how can a zone rr be neg? */ - if (dp->d_cred != DB_C_ZONE) - goto delete; - else - return (DATAEXISTS); - } -#endif - /* - * Some RR types should not be aggregated. - */ - if (dp->d_type == T_SOA) - goto delete; - if (dp->d_type == T_WKS && - !bcmp(dp->d_data, newdp->d_data, - INT32SZ + sizeof(u_char))) - goto delete; - if (check_ttl) { - if (newdp->d_ttl != dp->d_ttl) - syslog(LOG_WARNING, - "%s %s %s differing ttls: corrected", - name[0]?name:".", - p_class(dp->d_class), - p_type(dp->d_type)); - if (newdp->d_ttl > dp->d_ttl) { - newdp->d_ttl = dp->d_ttl; - } else { - dp->d_ttl = newdp->d_ttl; - } - } - } - if ((flags & DB_NODATA) && !db_cmp(dp, odp)) { - /* refresh ttl if cache entry */ - if (dp->d_zone == 0) { - if (odp->d_zone != 0) { /* XXX */ - /* changing cache->auth */ - dp->d_zone = odp->d_zone; - dp->d_ttl = odp->d_ttl; - dprintf(4, (ddt, - "db_update: cache entry now in auth zone\n" - )); - return (DATAEXISTS); - } - fixttl(odp); - if (odp->d_ttl > dp->d_ttl) - dp->d_ttl = odp->d_ttl; - dprintf(3, (ddt, - "db_update: new ttl %ld +%ld\n", - (u_long)dp->d_ttl, - (u_long) - (dp->d_ttl - tt.tv_sec))); - } - return (DATAEXISTS); - } - /* - * If the old databuf has some data, check that the - * data matches that in the new databuf (so UPDATED - * will delete only the matching RR) - */ - if (odp->d_size > 0) - if (db_cmp(dp, odp)) - goto skip; - if (odp->d_clev < dp->d_clev) - goto skip; - if (odp->d_cred < dp->d_cred) - goto skip; - foundRR = 1; - if (flags & DB_DELETE) { - delete: dp = rm_datum(dp, np, pdp); - } else { - skip: pdp = dp; - dp = dp->d_next; - } - } - if (!foundRR) { - if (flags & DB_DELETE) - return (NODATA); - if (flags & DB_MEXIST) - return (NODATA); - } - } - if (newdp == NULL) - return (OK); - /* XXX: empty nodes bypass credibility checks above; should check - * response source address here if flags&NOTAUTH. - */ - fixttl(newdp); - dprintf(3, (ddt, "db_update: adding%s %lx\n", - (newdp->d_flags&DB_F_HINT) ? " hint":"", (u_long)newdp)); -#ifdef INVQ - if (!(newdp->d_flags & DB_F_HINT)) - addinv(np, newdp); /* modify inverse query tables */ -#endif - -#ifdef STATS - if (!newdp->d_zone && !(newdp->d_flags & DB_F_HINT)) - newdp->d_ns = nameserFind(from_addr.sin_addr, NS_F_INSERT); -#endif - - /* Add to end of list, generally preserving order */ - newdp->d_next = NULL; - if ((dp = np->n_data) == NULL) { - newdp->d_rcnt = 1; - if (newdp->d_flags & DB_F_ACTIVE) - panic(-1, "db_update: DB_F_ACTIVE set"); - newdp->d_flags |= DB_F_ACTIVE; - np->n_data = newdp; - return (OK); - } - while (dp->d_next != NULL) { - if ((flags & DB_NODATA) && !db_cmp(dp, newdp)) - return (DATAEXISTS); - dp = dp->d_next; - } - if ((flags & DB_NODATA) && !db_cmp(dp, newdp)) - return (DATAEXISTS); - newdp->d_rcnt = 1; - if (newdp->d_flags & DB_F_ACTIVE) - panic(-1, "db_update: DB_F_ACTIVE set"); - newdp->d_flags |= DB_F_ACTIVE; - dp->d_next = newdp; - return (OK); -} - -void -fixttl(dp) - register struct databuf *dp; -{ - if (dp->d_zone == 0 && !(dp->d_flags & DB_F_HINT)) { - if (dp->d_ttl <= tt.tv_sec) - return; - else if (dp->d_ttl < tt.tv_sec+min_cache_ttl) - dp->d_ttl = tt.tv_sec+min_cache_ttl; - else if (dp->d_ttl > tt.tv_sec+max_cache_ttl) - dp->d_ttl = tt.tv_sec+max_cache_ttl; - } - return; -} - -/* - * Compare type, class and data from databufs for equivalence. - * Must be case insensitive for some domain names. - * Return 0 if equivalent, nonzero otherwise. - */ -int -db_cmp(dp1, dp2) - register struct databuf *dp1, *dp2; -{ - register u_char *cp1, *cp2; - int len, len2; - - if (dp1->d_type != dp2->d_type || dp1->d_class != dp2->d_class) - return (1); - if (dp1->d_size != dp2->d_size) - return (1); -#ifdef NCACHE - if (dp1->d_rcode && dp2->d_rcode) - return ((dp1->d_rcode == dp1->d_rcode)?0:1); - if (dp1->d_rcode || dp2->d_rcode) - return (1); -#endif - - switch (dp1->d_type) { - - case T_SIG: - case T_KEY: - case T_A: - case T_UID: - case T_GID: - case T_WKS: - case T_NULL: - case T_NSAP: - case T_AAAA: - case T_LOC: -#ifdef ALLOW_T_UNSPEC - case T_UNSPEC: -#endif - return (bcmp(dp1->d_data, dp2->d_data, dp1->d_size)); - - case T_NS: - case T_CNAME: - case T_PTR: - case T_MB: - case T_MG: - case T_MR: - case T_UINFO: - return (strcasecmp((char *)dp1->d_data, (char *)dp2->d_data)); - - case T_HINFO: - case T_ISDN: - cp1 = dp1->d_data; - cp2 = dp2->d_data; - len = *cp1; - len2 = *cp2; - if (len != len2) - return (1); - if (strncasecmp((char *)++cp1, (char *)++cp2, len)) - return (1); - cp1 += len; - cp2 += len; - len = *cp1; - len2 = *cp2; - if (len != len2) - return (1); - return (strncasecmp((char *)++cp1, (char *)++cp2, len)); - - case T_SOA: - case T_MINFO: - case T_RP: - if (strcasecmp((char *)dp1->d_data, (char *)dp2->d_data)) - return (1); - cp1 = dp1->d_data + strlen((char *)dp1->d_data) + 1; - cp2 = dp2->d_data + strlen((char *)dp2->d_data) + 1; - if (dp1->d_type != T_SOA) - return (strcasecmp((char *)cp1, (char *)cp2)); - if (strcasecmp((char *)cp1, (char *)cp2)) - return (1); - cp1 += strlen((char *)cp1) + 1; - cp2 += strlen((char *)cp2) + 1; - return (bcmp(cp1, cp2, INT32SZ * 5)); - - case T_NAPTR: { - int t1,t2; - - if (dp1->d_size != dp2->d_size) - return (1); - cp1 = dp1->d_data; - cp2 = dp2->d_data; - - /* Order */ - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) - return (1); - - /* Preference */ - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) - return (1); - - /* Flags */ - t1 = *cp1++; t2 = *cp2++; - if (t1 != t2 || bcmp(cp1, cp2, t1)) - return (1); - cp1 += t1; cp2 += t2; - - /* Services */ - t1 = *cp1++; t2 = *cp2++; - if (t1 != t2 || bcmp(cp1, cp2, t1)) - return (1); - cp1 += t1; cp2 += t2; - - /* Regexp */ - t1 = *cp1++; t2 = *cp2++; - if (t1 != t2 || bcmp(cp1, cp2, t1)) - return (1); - cp1 += t1; cp2 += t2; - - /* Replacement */ - t1 = strlen((char *)cp1); t2 = strlen((char *)cp2); - if (t1 != t2 || bcmp(cp1, cp2, t1)) - return (1); - cp1 += t1 + 1; cp2 += t2 + 1; - - /* they all checked out! */ - return (0); - } - - case T_MX: - case T_AFSDB: - case T_RT: - case T_SRV: - cp1 = dp1->d_data; - cp2 = dp2->d_data; - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) /* cmp prio */ - return (1); - if (dp1->d_type == T_SRV) { - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) /* weight */ - return (1); - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) /* port */ - return (1); - } - return (strcasecmp((char *)cp1, (char *)cp2)); - - case T_PX: - cp1 = dp1->d_data; - cp2 = dp2->d_data; - if (*cp1++ != *cp2++ || *cp1++ != *cp2++) /* cmp prio */ - return (1); - if (strcasecmp((char *)cp1, (char *)cp2)) - return (1); - cp1 += strlen((char *)cp1) + 1; - cp2 += strlen((char *)cp2) + 1; - return (strcasecmp((char *)cp1, (char *)cp2)); - - case T_TXT: - case T_X25: - if (dp1->d_size != dp2->d_size) - return (1); - return (bcmp(dp1->d_data, dp2->d_data, dp1->d_size)); - - default: - return (1); - } -} |
