/* * Portions Copyright (C) 2005-2007, 2009 Internet Systems Consortium, Inc. ("ISC") * Portions Copyright (C) 1999-2001 Internet Software Consortium. * * Permission to use, copy, modify, and/or 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. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC 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 (C) 2002 Stichting NLnet, Netherlands, stichting@nlnet.nl. * * 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. * * THE SOFTWARE IS PROVIDED "AS IS" AND STICHTING NLNET * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL * STICHTING NLNET 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. * * The development of Dynamically Loadable Zones (DLZ) for Bind 9 was * conceived and contributed by Rob Butler. * * 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. * * THE SOFTWARE IS PROVIDED "AS IS" AND ROB BUTLER * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL * ROB BUTLER 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. */ /* $Id: sdlz.c,v 1.2.2.14 2009/06/26 06:25:20 marka Exp $ */ /*! \file */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "rdatalist_p.h" /* * Private Types */ struct dns_sdlzimplementation { const dns_sdlzmethods_t *methods; isc_mem_t *mctx; void *driverarg; unsigned int flags; isc_mutex_t driverlock; dns_dlzimplementation_t *dlz_imp; }; struct dns_sdlz_db { /* Unlocked */ dns_db_t common; void *dbdata; dns_sdlzimplementation_t *dlzimp; isc_mutex_t refcnt_lock; /* Locked */ unsigned int references; }; struct dns_sdlzlookup { /* Unlocked */ unsigned int magic; dns_sdlz_db_t *sdlz; ISC_LIST(dns_rdatalist_t) lists; ISC_LIST(isc_buffer_t) buffers; dns_name_t *name; ISC_LINK(dns_sdlzlookup_t) link; isc_mutex_t lock; dns_rdatacallbacks_t callbacks; /* Locked */ unsigned int references; }; typedef struct dns_sdlzlookup dns_sdlznode_t; struct dns_sdlzallnodes { dns_dbiterator_t common; ISC_LIST(dns_sdlznode_t) nodelist; dns_sdlznode_t *current; dns_sdlznode_t *origin; }; typedef dns_sdlzallnodes_t sdlz_dbiterator_t; typedef struct sdlz_rdatasetiter { dns_rdatasetiter_t common; dns_rdatalist_t *current; } sdlz_rdatasetiter_t; #define SDLZDB_MAGIC ISC_MAGIC('D', 'L', 'Z', 'S') /* * Note that "impmagic" is not the first four bytes of the struct, so * ISC_MAGIC_VALID cannot be used. */ #define VALID_SDLZDB(sdlzdb) ((sdlzdb) != NULL && \ (sdlzdb)->common.impmagic == SDLZDB_MAGIC) #define SDLZLOOKUP_MAGIC ISC_MAGIC('D','L','Z','L') #define VALID_SDLZLOOKUP(sdlzl) ISC_MAGIC_VALID(sdlzl, SDLZLOOKUP_MAGIC) #define VALID_SDLZNODE(sdlzn) VALID_SDLZLOOKUP(sdlzn) /* These values are taken from RFC 1537 */ #define SDLZ_DEFAULT_REFRESH (60 * 60 * 8) #define SDLZ_DEFAULT_RETRY (60 * 60 * 2) #define SDLZ_DEFAULT_EXPIRE (60 * 60 * 24 * 7) #define SDLZ_DEFAULT_MINIMUM (60 * 60 * 24) /* This is a reasonable value */ #define SDLZ_DEFAULT_TTL (60 * 60 * 24) static int dummy; #ifdef __COVERITY__ #define MAYBE_LOCK(imp) LOCK(&imp->driverlock) #define MAYBE_UNLOCK(imp) UNLOCK(&imp->driverlock) #else #define MAYBE_LOCK(imp) \ do { \ unsigned int flags = imp->flags; \ if ((flags & DNS_SDLZFLAG_THREADSAFE) == 0) \ LOCK(&imp->driverlock); \ } while (0) #define MAYBE_UNLOCK(imp) \ do { \ unsigned int flags = imp->flags; \ if ((flags & DNS_SDLZFLAG_THREADSAFE) == 0) \ UNLOCK(&imp->driverlock); \ } while (0) #endif /* * Forward references. Try to keep these to a minimum. */ static void list_tordataset(dns_rdatalist_t *rdatalist, dns_db_t *db, dns_dbnode_t *node, dns_rdataset_t *rdataset); static void detachnode(dns_db_t *db, dns_dbnode_t **targetp); static void dbiterator_destroy(dns_dbiterator_t **iteratorp); static isc_result_t dbiterator_first(dns_dbiterator_t *iterator); static isc_result_t dbiterator_last(dns_dbiterator_t *iterator); static isc_result_t dbiterator_seek(dns_dbiterator_t *iterator, dns_name_t *name); static isc_result_t dbiterator_prev(dns_dbiterator_t *iterator); static isc_result_t dbiterator_next(dns_dbiterator_t *iterator); static isc_result_t dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep, dns_name_t *name); static isc_result_t dbiterator_pause(dns_dbiterator_t *iterator); static isc_result_t dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name); static dns_dbiteratormethods_t dbiterator_methods = { dbiterator_destroy, dbiterator_first, dbiterator_last, dbiterator_seek, dbiterator_prev, dbiterator_next, dbiterator_current, dbiterator_pause, dbiterator_origin }; /* * Utility functions */ /*% Converts the input string to lowercase, in place. */ static void dns_sdlz_tolower(char *str) { unsigned int len = strlen(str); unsigned int i; for (i = 0; i < len; i++) { if (str[i] >= 'A' && str[i] <= 'Z') str[i] += 32; } } static inline unsigned int initial_size(const char *data) { unsigned int len = (strlen(data) / 64) + 1; return (len * 64 + 64); } /* * Rdataset Iterator Methods. These methods were "borrowed" from the SDB * driver interface. See the SDB driver interface documentation for more info. */ static void rdatasetiter_destroy(dns_rdatasetiter_t **iteratorp) { sdlz_rdatasetiter_t *sdlziterator = (sdlz_rdatasetiter_t *)(*iteratorp); detachnode(sdlziterator->common.db, &sdlziterator->common.node); isc_mem_put(sdlziterator->common.db->mctx, sdlziterator, sizeof(sdlz_rdatasetiter_t)); *iteratorp = NULL; } static isc_result_t rdatasetiter_first(dns_rdatasetiter_t *iterator) { sdlz_rdatasetiter_t *sdlziterator = (sdlz_rdatasetiter_t *)iterator; dns_sdlznode_t *sdlznode = (dns_sdlznode_t *)iterator->node; if (ISC_LIST_EMPTY(sdlznode->lists)) return (ISC_R_NOMORE); sdlziterator->current = ISC_LIST_HEAD(sdlznode->lists); return (ISC_R_SUCCESS); } static isc_result_t rdatasetiter_next(dns_rdatasetiter_t *iterator) { sdlz_rdatasetiter_t *sdlziterator = (sdlz_rdatasetiter_t *)iterator; sdlziterator->current = ISC_LIST_NEXT(sdlziterator->current, link); if (sdlziterator->current == NULL) return (ISC_R_NOMORE); else return (ISC_R_SUCCESS); } static void rdatasetiter_current(dns_rdatasetiter_t *iterator, dns_rdataset_t *rdataset) { sdlz_rdatasetiter_t *sdlziterator = (sdlz_rdatasetiter_t *)iterator; list_tordataset(sdlziterator->current, iterator->db, iterator->node, rdataset); } static dns_rdatasetitermethods_t rdatasetiter_methods = { rdatasetiter_destroy, rdatasetiter_first, rdatasetiter_next, rdatasetiter_current }; /* * DB routines. These methods were "borrowed" from the SDB driver interface. * See the SDB driver interface documentation for more info. */ static void attach(dns_db_t *source, dns_db_t **targetp) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *) source; REQUIRE(VALID_SDLZDB(sdlz)); LOCK(&sdlz->refcnt_lock); REQUIRE(sdlz->references > 0); sdlz->references++; UNLOCK(&sdlz->refcnt_lock); *targetp = source; } static void destroy(dns_sdlz_db_t *sdlz) { isc_mem_t *mctx; mctx = sdlz->common.mctx; sdlz->common.magic = 0; sdlz->common.impmagic = 0; isc_mutex_destroy(&sdlz->refcnt_lock); dns_name_free(&sdlz->common.origin, mctx); isc_mem_put(mctx, sdlz, sizeof(dns_sdlz_db_t)); isc_mem_detach(&mctx); } static void detach(dns_db_t **dbp) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)(*dbp); isc_boolean_t need_destroy = ISC_FALSE; REQUIRE(VALID_SDLZDB(sdlz)); LOCK(&sdlz->refcnt_lock); REQUIRE(sdlz->references > 0); sdlz->references--; if (sdlz->references == 0) need_destroy = ISC_TRUE; UNLOCK(&sdlz->refcnt_lock); if (need_destroy) destroy(sdlz); *dbp = NULL; } static isc_result_t beginload(dns_db_t *db, dns_addrdatasetfunc_t *addp, dns_dbload_t **dbloadp) { UNUSED(db); UNUSED(addp); UNUSED(dbloadp); return (ISC_R_NOTIMPLEMENTED); } static isc_result_t endload(dns_db_t *db, dns_dbload_t **dbloadp) { UNUSED(db); UNUSED(dbloadp); return (ISC_R_NOTIMPLEMENTED); } static isc_result_t dump(dns_db_t *db, dns_dbversion_t *version, const char *filename, dns_masterformat_t masterformat) { UNUSED(db); UNUSED(version); UNUSED(filename); UNUSED(masterformat); return (ISC_R_NOTIMPLEMENTED); } static void currentversion(dns_db_t *db, dns_dbversion_t **versionp) { REQUIRE(versionp != NULL && *versionp == NULL); UNUSED(db); *versionp = (void *) &dummy; return; } static isc_result_t newversion(dns_db_t *db, dns_dbversion_t **versionp) { UNUSED(db); UNUSED(versionp); return (ISC_R_NOTIMPLEMENTED); } static void attachversion(dns_db_t *db, dns_dbversion_t *source, dns_dbversion_t **targetp) { REQUIRE(source != NULL && source == (void *) &dummy); UNUSED(db); UNUSED(source); UNUSED(targetp); *targetp = source; } static void closeversion(dns_db_t *db, dns_dbversion_t **versionp, isc_boolean_t commit) { REQUIRE(versionp != NULL && *versionp == (void *) &dummy); REQUIRE(commit == ISC_FALSE); UNUSED(db); UNUSED(commit); *versionp = NULL; } static isc_result_t createnode(dns_sdlz_db_t *sdlz, dns_sdlznode_t **nodep) { dns_sdlznode_t *node; isc_result_t result; node = isc_mem_get(sdlz->common.mctx, sizeof(dns_sdlznode_t)); if (node == NULL) return (ISC_R_NOMEMORY); node->sdlz = NULL; attach((dns_db_t *)sdlz, (dns_db_t **)&node->sdlz); ISC_LIST_INIT(node->lists); ISC_LIST_INIT(node->buffers); ISC_LINK_INIT(node, link); node->name = NULL; result = isc_mutex_init(&node->lock); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_mutex_init() failed: %s", isc_result_totext(result)); isc_mem_put(sdlz->common.mctx, node, sizeof(dns_sdlznode_t)); return (ISC_R_UNEXPECTED); } dns_rdatacallbacks_init(&node->callbacks); node->references = 1; node->magic = SDLZLOOKUP_MAGIC; *nodep = node; return (ISC_R_SUCCESS); } static void destroynode(dns_sdlznode_t *node) { dns_rdatalist_t *list; dns_rdata_t *rdata; isc_buffer_t *b; dns_sdlz_db_t *sdlz; dns_db_t *db; isc_mem_t *mctx; sdlz = node->sdlz; mctx = sdlz->common.mctx; while (!ISC_LIST_EMPTY(node->lists)) { list = ISC_LIST_HEAD(node->lists); while (!ISC_LIST_EMPTY(list->rdata)) { rdata = ISC_LIST_HEAD(list->rdata); ISC_LIST_UNLINK(list->rdata, rdata, link); isc_mem_put(mctx, rdata, sizeof(dns_rdata_t)); } ISC_LIST_UNLINK(node->lists, list, link); isc_mem_put(mctx, list, sizeof(dns_rdatalist_t)); } while (!ISC_LIST_EMPTY(node->buffers)) { b = ISC_LIST_HEAD(node->buffers); ISC_LIST_UNLINK(node->buffers, b, link); isc_buffer_free(&b); } if (node->name != NULL) { dns_name_free(node->name, mctx); isc_mem_put(mctx, node->name, sizeof(dns_name_t)); } DESTROYLOCK(&node->lock); node->magic = 0; isc_mem_put(mctx, node, sizeof(dns_sdlznode_t)); db = &sdlz->common; detach(&db); } static isc_result_t findnode(dns_db_t *db, dns_name_t *name, isc_boolean_t create, dns_dbnode_t **nodep) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)db; dns_sdlznode_t *node = NULL; isc_result_t result; isc_buffer_t b; char namestr[DNS_NAME_MAXTEXT + 1]; isc_buffer_t b2; char zonestr[DNS_NAME_MAXTEXT + 1]; isc_boolean_t isorigin; dns_sdlzauthorityfunc_t authority; REQUIRE(VALID_SDLZDB(sdlz)); REQUIRE(create == ISC_FALSE); REQUIRE(nodep != NULL && *nodep == NULL); UNUSED(name); UNUSED(create); isc_buffer_init(&b, namestr, sizeof(namestr)); if ((sdlz->dlzimp->flags & DNS_SDLZFLAG_RELATIVEOWNER) != 0) { dns_name_t relname; unsigned int labels; labels = dns_name_countlabels(name) - dns_name_countlabels(&db->origin); dns_name_init(&relname, NULL); dns_name_getlabelsequence(name, 0, labels, &relname); result = dns_name_totext(&relname, ISC_TRUE, &b); if (result != ISC_R_SUCCESS) return (result); } else { result = dns_name_totext(name, ISC_TRUE, &b); if (result != ISC_R_SUCCESS) return (result); } isc_buffer_putuint8(&b, 0); isc_buffer_init(&b2, zonestr, sizeof(zonestr)); result = dns_name_totext(&sdlz->common.origin, ISC_TRUE, &b2); if (result != ISC_R_SUCCESS) return (result); isc_buffer_putuint8(&b2, 0); result = createnode(sdlz, &node); if (result != ISC_R_SUCCESS) return (result); isorigin = dns_name_equal(name, &sdlz->common.origin); /* make sure strings are always lowercase */ dns_sdlz_tolower(zonestr); dns_sdlz_tolower(namestr); MAYBE_LOCK(sdlz->dlzimp); /* try to lookup the host (namestr) */ result = sdlz->dlzimp->methods->lookup(zonestr, namestr, sdlz->dlzimp->driverarg, sdlz->dbdata, node); /* * if the host (namestr) was not found, try to lookup a * "wildcard" host. */ if (result != ISC_R_SUCCESS) { result = sdlz->dlzimp->methods->lookup(zonestr, "*", sdlz->dlzimp->driverarg, sdlz->dbdata, node); } MAYBE_UNLOCK(sdlz->dlzimp); if (result != ISC_R_SUCCESS && !isorigin) { destroynode(node); return (result); } if (isorigin && sdlz->dlzimp->methods->authority != NULL) { MAYBE_LOCK(sdlz->dlzimp); authority = sdlz->dlzimp->methods->authority; result = (*authority)(zonestr, sdlz->dlzimp->driverarg, sdlz->dbdata, node); MAYBE_UNLOCK(sdlz->dlzimp); if (result != ISC_R_SUCCESS && result != ISC_R_NOTIMPLEMENTED) { destroynode(node); return (result); } } *nodep = node; return (ISC_R_SUCCESS); } static isc_result_t findzonecut(dns_db_t *db, dns_name_t *name, unsigned int options, isc_stdtime_t now, dns_dbnode_t **nodep, dns_name_t *foundname, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) { UNUSED(db); UNUSED(name); UNUSED(options); UNUSED(now); UNUSED(nodep); UNUSED(foundname); UNUSED(rdataset); UNUSED(sigrdataset); return (ISC_R_NOTIMPLEMENTED); } static void attachnode(dns_db_t *db, dns_dbnode_t *source, dns_dbnode_t **targetp) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)db; dns_sdlznode_t *node = (dns_sdlznode_t *)source; REQUIRE(VALID_SDLZDB(sdlz)); UNUSED(sdlz); LOCK(&node->lock); INSIST(node->references > 0); node->references++; INSIST(node->references != 0); /* Catch overflow. */ UNLOCK(&node->lock); *targetp = source; } static void detachnode(dns_db_t *db, dns_dbnode_t **targetp) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)db; dns_sdlznode_t *node; isc_boolean_t need_destroy = ISC_FALSE; REQUIRE(VALID_SDLZDB(sdlz)); REQUIRE(targetp != NULL && *targetp != NULL); UNUSED(sdlz); node = (dns_sdlznode_t *)(*targetp); LOCK(&node->lock); INSIST(node->references > 0); node->references--; if (node->references == 0) need_destroy = ISC_TRUE; UNLOCK(&node->lock); if (need_destroy) destroynode(node); *targetp = NULL; } static isc_result_t expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) { UNUSED(db); UNUSED(node); UNUSED(now); INSIST(0); return (ISC_R_UNEXPECTED); } static void printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) { UNUSED(db); UNUSED(node); UNUSED(out); return; } static isc_result_t createiterator(dns_db_t *db, isc_boolean_t relative_names, dns_dbiterator_t **iteratorp) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)db; sdlz_dbiterator_t *sdlziter; isc_result_t result; isc_buffer_t b; char zonestr[DNS_NAME_MAXTEXT + 1]; REQUIRE(VALID_SDLZDB(sdlz)); if (sdlz->dlzimp->methods->allnodes == NULL) return (ISC_R_NOTIMPLEMENTED); isc_buffer_init(&b, zonestr, sizeof(zonestr)); result = dns_name_totext(&sdlz->common.origin, ISC_TRUE, &b); if (result != ISC_R_SUCCESS) return (result); isc_buffer_putuint8(&b, 0); sdlziter = isc_mem_get(sdlz->common.mctx, sizeof(sdlz_dbiterator_t)); if (sdlziter == NULL) return (ISC_R_NOMEMORY); sdlziter->common.methods = &dbiterator_methods; sdlziter->common.db = NULL; dns_db_attach(db, &sdlziter->common.db); sdlziter->common.relative_names = relative_names; sdlziter->common.magic = DNS_DBITERATOR_MAGIC; ISC_LIST_INIT(sdlziter->nodelist); sdlziter->current = NULL; sdlziter->origin = NULL; /* make sure strings are always lowercase */ dns_sdlz_tolower(zonestr); MAYBE_LOCK(sdlz->dlzimp); result = sdlz->dlzimp->methods->allnodes(zonestr, sdlz->dlzimp->driverarg, sdlz->dbdata, sdlziter); MAYBE_UNLOCK(sdlz->dlzimp); if (result != ISC_R_SUCCESS) { dns_dbiterator_t *iter = &sdlziter->common; dbiterator_destroy(&iter); return (result); } if (sdlziter->origin != NULL) { ISC_LIST_UNLINK(sdlziter->nodelist, sdlziter->origin, link); ISC_LIST_PREPEND(sdlziter->nodelist, sdlziter->origin, link); } *iteratorp = (dns_dbiterator_t *)sdlziter; return (ISC_R_SUCCESS); } static isc_result_t findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, dns_rdatatype_t type, dns_rdatatype_t covers, isc_stdtime_t now, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) { dns_rdatalist_t *list; dns_sdlznode_t *sdlznode = (dns_sdlznode_t *)node; REQUIRE(VALID_SDLZNODE(node)); UNUSED(db); UNUSED(version); UNUSED(covers); UNUSED(now); UNUSED(sigrdataset); if (type == dns_rdatatype_sig || type == dns_rdatatype_rrsig) return (ISC_R_NOTIMPLEMENTED); list = ISC_LIST_HEAD(sdlznode->lists); while (list != NULL) { if (list->type == type) break; list = ISC_LIST_NEXT(list, link); } if (list == NULL) return (ISC_R_NOTFOUND); list_tordataset(list, db, node, rdataset); return (ISC_R_SUCCESS); } static isc_result_t find(dns_db_t *db, dns_name_t *name, dns_dbversion_t *version, dns_rdatatype_t type, unsigned int options, isc_stdtime_t now, dns_dbnode_t **nodep, dns_name_t *foundname, dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) { dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)db; dns_dbnode_t *node = NULL; dns_fixedname_t fname; dns_rdataset_t xrdataset; dns_name_t *xname; unsigned int nlabels, olabels; isc_result_t result; unsigned int i; REQUIRE(VALID_SDLZDB(sdlz)); REQUIRE(nodep == NULL || *nodep == NULL); REQUIRE(version == NULL || version == (void *) &dummy); UNUSED(options); UNUSED(sdlz); if (!dns_name_issubdomain(name, &db->origin)) return (DNS_R_NXDOMAIN); olabels = dns_name_countlabels(&db->origin); nlabels = dns_name_countlabels(name); dns_fixedname_init(&fname); xname = dns_fixedname_name(&fname); if (rdataset == NULL) { dns_rdataset_init(&xrdataset); rdataset = &xrdataset; } result = DNS_R_NXDOMAIN; for (i = olabels; i <= nlabels; i++) { /* * Unless this is an explicit lookup at the origin, don't * look at the origin. */ if (i == olabels && i != nlabels) continue; /* * Look up the next label. */ dns_name_getlabelsequence(name, nlabels - i, i, xname); result = findnode(db, xname, ISC_FALSE, &node); if (result != ISC_R_SUCCESS) { result = DNS_R_NXDOMAIN; continue; } /* * Look for a DNAME at the current label, unless this is * the qname. */ if (i < nlabels) { result = findrdataset(db, node, version, dns_rdatatype_dname, 0, now, rdataset, sigrdataset); if (result == ISC_R_SUCCESS) { result = DNS_R_DNAME; break; } } /* * Look for an NS at the current label, unless this is the * origin or glue is ok. */ if (i != olabels && (options & DNS_DBFIND_GLUEOK) == 0) { result = findrdataset(db, node, version, dns_rdatatype_ns, 0, now, rdataset, sigrdataset); if (result == ISC_R_SUCCESS) { if (i == nlabels && type == dns_rdatatype_any) { result = DNS_R_ZONECUT; dns_rdataset_disassociate(rdataset); if (sigrdataset != NULL && dns_rdataset_isassociated (sigrdataset)) { dns_rdataset_disassociate (sigrdataset); } } else result = DNS_R_DELEGATION; break; } } /* * If the current name is not the qname, add another label * and try again. */ if (i < nlabels) { destroynode(node); node = NULL; continue; } /* * If we're looking for ANY, we're done. */ if (type == dns_rdatatype_any) { result = ISC_R_SUCCESS; break; } /* * Look for the qtype. */ result = findrdataset(db, node, version, type, 0, now, rdataset, sigrdataset); if (result == ISC_R_SUCCESS) break; /* * Look for a CNAME */ if (type != dns_rdatatype_cname) { result = findrdataset(db, node, version, dns_rdatatype_cname, 0, now, rdataset, sigrdataset); if (result == ISC_R_SUCCESS) { result = DNS_R_CNAME; break; } } result = DNS_R_NXRRSET; break; } if (rdataset == &xrdataset && dns_rdataset_isassociated(rdataset)) dns_rdataset_disassociate(rdataset); if (foundname != NULL) { isc_result_t xresult; xresult = dns_name_copy(xname, foundname, NULL); if (xresult != ISC_R_SUCCESS) { if (node != NULL) destroynode(node); if (dns_rdataset_isassociated(rdataset)) dns_rdataset_disassociate(rdataset); return (DNS_R_BADDB); } } if (nodep != NULL) *nodep = node; else if (node != NULL) detachnode(db, &node); return (result); } static isc_result_t allrdatasets(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, isc_stdtime_t now, dns_rdatasetiter_t **iteratorp) { sdlz_rdatasetiter_t *iterator; REQUIRE(version == NULL || version == &dummy); UNUSED(version); UNUSED(now); iterator = isc_mem_get(db->mctx, sizeof(sdlz_rdatasetiter_t)); if (iterator == NULL) return (ISC_R_NOMEMORY); iterator->common.magic = DNS_RDATASETITER_MAGIC; iterator->common.methods = &rdatasetiter_methods; iterator->common.db = db; iterator->common.node = NULL; attachnode(db, node, &iterator->common.node); iterator->common.version = version; iterator->common.now = now; *iteratorp = (dns_rdatasetiter_t *)iterator; return (ISC_R_SUCCESS); } static isc_result_t addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, isc_stdtime_t now, dns_rdataset_t *rdataset, unsigned int options, dns_rdataset_t *addedrdataset) { UNUSED(db); UNUSED(node); UNUSED(version); UNUSED(now); UNUSED(rdataset); UNUSED(options); UNUSED(addedrdataset); return (ISC_R_NOTIMPLEMENTED); } static isc_result_t subtractrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, dns_rdataset_t *rdataset, unsigned int options, dns_rdataset_t *newrdataset) { UNUSED(db); UNUSED(node); UNUSED(version); UNUSED(rdataset); UNUSED(options); UNUSED(newrdataset); return (ISC_R_NOTIMPLEMENTED); } static isc_result_t deleterdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version, dns_rdatatype_t type, dns_rdatatype_t covers) { UNUSED(db); UNUSED(node); UNUSED(version); UNUSED(type); UNUSED(covers); return (ISC_R_NOTIMPLEMENTED); } static isc_boolean_t issecure(dns_db_t *db) { UNUSED(db); return (ISC_FALSE); } static unsigned int nodecount(dns_db_t *db) { UNUSED(db); return (0); } static isc_boolean_t ispersistent(dns_db_t *db) { UNUSED(db); return (ISC_TRUE); } static void overmem(dns_db_t *db, isc_boolean_t overmem) { UNUSED(db); UNUSED(overmem); } static void settask(dns_db_t *db, isc_task_t *task) { UNUSED(db); UNUSED(task); } static dns_dbmethods_t sdlzdb_methods = { attach, detach, beginload, endload, dump, currentversion, newversion, attachversion, closeversion, findnode, find, findzonecut, attachnode, detachnode, expirenode, printnode, createiterator, findrdataset, allrdatasets, addrdataset, subtractrdataset, deleterdataset, issecure, nodecount, ispersistent, overmem, settask, NULL, }; /* * Database Iterator Methods. These methods were "borrowed" from the SDB * driver interface. See the SDB driver interface documentation for more info. */ static void dbiterator_destroy(dns_dbiterator_t **iteratorp) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)(*iteratorp); dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)sdlziter->common.db; while (!ISC_LIST_EMPTY(sdlziter->nodelist)) { dns_sdlznode_t *node; node = ISC_LIST_HEAD(sdlziter->nodelist); ISC_LIST_UNLINK(sdlziter->nodelist, node, link); destroynode(node); } dns_db_detach(&sdlziter->common.db); isc_mem_put(sdlz->common.mctx, sdlziter, sizeof(sdlz_dbiterator_t)); *iteratorp = NULL; } static isc_result_t dbiterator_first(dns_dbiterator_t *iterator) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; sdlziter->current = ISC_LIST_HEAD(sdlziter->nodelist); if (sdlziter->current == NULL) return (ISC_R_NOMORE); else return (ISC_R_SUCCESS); } static isc_result_t dbiterator_last(dns_dbiterator_t *iterator) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; sdlziter->current = ISC_LIST_TAIL(sdlziter->nodelist); if (sdlziter->current == NULL) return (ISC_R_NOMORE); else return (ISC_R_SUCCESS); } static isc_result_t dbiterator_seek(dns_dbiterator_t *iterator, dns_name_t *name) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; sdlziter->current = ISC_LIST_HEAD(sdlziter->nodelist); while (sdlziter->current != NULL) { if (dns_name_equal(sdlziter->current->name, name)) return (ISC_R_SUCCESS); sdlziter->current = ISC_LIST_NEXT(sdlziter->current, link); } return (ISC_R_NOTFOUND); } static isc_result_t dbiterator_prev(dns_dbiterator_t *iterator) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; sdlziter->current = ISC_LIST_PREV(sdlziter->current, link); if (sdlziter->current == NULL) return (ISC_R_NOMORE); else return (ISC_R_SUCCESS); } static isc_result_t dbiterator_next(dns_dbiterator_t *iterator) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; sdlziter->current = ISC_LIST_NEXT(sdlziter->current, link); if (sdlziter->current == NULL) return (ISC_R_NOMORE); else return (ISC_R_SUCCESS); } static isc_result_t dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep, dns_name_t *name) { sdlz_dbiterator_t *sdlziter = (sdlz_dbiterator_t *)iterator; attachnode(iterator->db, sdlziter->current, nodep); if (name != NULL) return (dns_name_copy(sdlziter->current->name, name, NULL)); return (ISC_R_SUCCESS); } static isc_result_t dbiterator_pause(dns_dbiterator_t *iterator) { UNUSED(iterator); return (ISC_R_SUCCESS); } static isc_result_t dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name) { UNUSED(iterator); return (dns_name_copy(dns_rootname, name, NULL)); } /* * Rdataset Methods. These methods were "borrowed" from the SDB driver * interface. See the SDB driver interface documentation for more info. */ static void disassociate(dns_rdataset_t *rdataset) { dns_dbnode_t *node = rdataset->private5; dns_sdlznode_t *sdlznode = (dns_sdlznode_t *) node; dns_db_t *db = (dns_db_t *) sdlznode->sdlz; detachnode(db, &node); isc__rdatalist_disassociate(rdataset); } static void rdataset_clone(dns_rdataset_t *source, dns_rdataset_t *target) { dns_dbnode_t *node = source->private5; dns_sdlznode_t *sdlznode = (dns_sdlznode_t *) node; dns_db_t *db = (dns_db_t *) sdlznode->sdlz; dns_dbnode_t *tempdb = NULL; isc__rdatalist_clone(source, target); attachnode(db, node, &tempdb); source->private5 = tempdb; } static dns_rdatasetmethods_t rdataset_methods = { disassociate, isc__rdatalist_first, isc__rdatalist_next, isc__rdatalist_current, rdataset_clone, isc__rdatalist_count, isc__rdatalist_addnoqname, isc__rdatalist_getnoqname, NULL, NULL, NULL }; static void list_tordataset(dns_rdatalist_t *rdatalist, dns_db_t *db, dns_dbnode_t *node, dns_rdataset_t *rdataset) { /* * The sdlz rdataset is an rdatalist with some additions. * - private1 & private2 are used by the rdatalist. * - private3 & private 4 are unused. * - private5 is the node. */ /* This should never fail. */ RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset) == ISC_R_SUCCESS); rdataset->methods = &rdataset_methods; dns_db_attachnode(db, node, &rdataset->private5); } /* * SDLZ core methods. This is the core of the new DLZ functionality. */ /*% * Build a 'bind' database driver structure to be returned by * either the find zone or the allow zone transfer method. * This method is only available in this source file, it is * not made available anywhere else. */ static isc_result_t dns_sdlzcreateDBP(isc_mem_t *mctx, void *driverarg, void *dbdata, dns_name_t *name, dns_rdataclass_t rdclass, dns_db_t **dbp) { isc_result_t result; dns_sdlz_db_t *sdlzdb; dns_sdlzimplementation_t *imp; /* check that things are as we expect */ REQUIRE(dbp != NULL && *dbp == NULL); REQUIRE(name != NULL); imp = (dns_sdlzimplementation_t *) driverarg; /* allocate and zero memory for driver structure */ sdlzdb = isc_mem_get(mctx, sizeof(dns_sdlz_db_t)); if (sdlzdb == NULL) return (ISC_R_NOMEMORY); memset(sdlzdb, 0, sizeof(dns_sdlz_db_t)); /* initialize and set origin */ dns_name_init(&sdlzdb->common.origin, NULL); result = dns_name_dupwithoffsets(name, mctx, &sdlzdb->common.origin); if (result != ISC_R_SUCCESS) goto mem_cleanup; /* initialize the reference count mutex */ result = isc_mutex_init(&sdlzdb->refcnt_lock); if (result != ISC_R_SUCCESS) goto name_cleanup; /* set the rest of the database structure attributes */ sdlzdb->dlzimp = imp; sdlzdb->common.methods = &sdlzdb_methods; sdlzdb->common.attributes = 0; sdlzdb->common.rdclass = rdclass; sdlzdb->common.mctx = NULL; sdlzdb->dbdata = dbdata; sdlzdb->references = 1; /* attach to the memory context */ isc_mem_attach(mctx, &sdlzdb->common.mctx); /* mark structure as valid */ sdlzdb->common.magic = DNS_DB_MAGIC; sdlzdb->common.impmagic = SDLZDB_MAGIC; *dbp = (dns_db_t *) sdlzdb; return (result); /* * reference count mutex could not be initialized, clean up * name memory */ name_cleanup: dns_name_free(&sdlzdb->common.origin, mctx); mem_cleanup: isc_mem_put(mctx, sdlzdb, sizeof(dns_sdlz_db_t)); return (result); } static isc_result_t dns_sdlzallowzonexfr(void *driverarg, void *dbdata, isc_mem_t *mctx, dns_rdataclass_t rdclass, dns_name_t *name, isc_sockaddr_t *clientaddr, dns_db_t **dbp) { isc_buffer_t b; isc_buffer_t b2; char namestr[DNS_NAME_MAXTEXT + 1]; char clientstr[(sizeof "xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255") + 1]; isc_netaddr_t netaddr; isc_result_t result; dns_sdlzimplementation_t *imp; /* * Perform checks to make sure data is as we expect it to be. */ REQUIRE(driverarg != NULL); REQUIRE(name != NULL); REQUIRE(clientaddr != NULL); REQUIRE(dbp != NULL && *dbp == NULL); imp = (dns_sdlzimplementation_t *) driverarg; /* Convert DNS name to ascii text */ isc_buffer_init(&b, namestr, sizeof(namestr)); result = dns_name_totext(name, ISC_TRUE, &b); if (result != ISC_R_SUCCESS) return (result); isc_buffer_putuint8(&b, 0); /* convert client address to ascii text */ isc_buffer_init(&b2, clientstr, sizeof(clientstr)); isc_netaddr_fromsockaddr(&netaddr, clientaddr); result = isc_netaddr_totext(&netaddr, &b2); if (result != ISC_R_SUCCESS) return (result); isc_buffer_putuint8(&b2, 0); /* make sure strings are always lowercase */ dns_sdlz_tolower(namestr); dns_sdlz_tolower(clientstr); /* Call SDLZ driver's find zone method */ if (imp->methods->allowzonexfr != NULL) { MAYBE_LOCK(imp); result = imp->methods->allowzonexfr(imp->driverarg, dbdata, namestr, clientstr); MAYBE_UNLOCK(imp); /* * if zone is supported and transfers allowed build a 'bind' * database driver */ if (result == ISC_R_SUCCESS) result = dns_sdlzcreateDBP(mctx, driverarg, dbdata, name, rdclass, dbp); return (result); } return (ISC_R_NOTIMPLEMENTED); } static isc_result_t dns_sdlzcreate(isc_mem_t *mctx, const char *dlzname, unsigned int argc, char *argv[], void *driverarg, void **dbdata) { dns_sdlzimplementation_t *imp; isc_result_t result = ISC_R_NOTFOUND; /* Write debugging message to log */ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2), "Loading SDLZ driver."); /* * Performs checks to make sure data is as we expect it to be. */ REQUIRE(driverarg != NULL); REQUIRE(dlzname != NULL); REQUIRE(dbdata != NULL); UNUSED(mctx); imp = driverarg; /* If the create method exists, call it. */ if (imp->methods->create != NULL) { MAYBE_LOCK(imp); result = imp->methods->create(dlzname, argc, argv, imp->driverarg, dbdata); MAYBE_UNLOCK(imp); } /* Write debugging message to log */ if (result == ISC_R_SUCCESS) { isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2), "SDLZ driver loaded successfully."); } else { isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_ERROR, "SDLZ driver failed to load."); } return (result); } static void dns_sdlzdestroy(void *driverdata, void **dbdata) { dns_sdlzimplementation_t *imp; /* Write debugging message to log */ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2), "Unloading SDLZ driver."); imp = driverdata; /* If the destroy method exists, call it. */ if (imp->methods->destroy != NULL) { MAYBE_LOCK(imp); imp->methods->destroy(imp->driverarg, dbdata); MAYBE_UNLOCK(imp); } } static isc_result_t dns_sdlzfindzone(void *driverarg, void *dbdata, isc_mem_t *mctx, dns_rdataclass_t rdclass, dns_name_t *name, dns_db_t **dbp) { isc_buffer_t b; char namestr[DNS_NAME_MAXTEXT + 1]; isc_result_t result; dns_sdlzimplementation_t *imp; /* * Perform checks to make sure data is as we expect it to be. */ REQUIRE(driverarg != NULL); REQUIRE(name != NULL); REQUIRE(dbp != NULL && *dbp == NULL); imp = (dns_sdlzimplementation_t *) driverarg; /* Convert DNS name to ascii text */ isc_buffer_init(&b, namestr, sizeof(namestr)); result = dns_name_totext(name, ISC_TRUE, &b); if (result != ISC_R_SUCCESS) return (result); isc_buffer_putuint8(&b, 0); /* make sure strings are always lowercase */ dns_sdlz_tolower(namestr); /* Call SDLZ driver's find zone method */ MAYBE_LOCK(imp); result = imp->methods->findzone(imp->driverarg, dbdata, namestr); MAYBE_UNLOCK(imp); /* * if zone is supported build a 'bind' database driver * structure to return */ if (result == ISC_R_SUCCESS) result = dns_sdlzcreateDBP(mctx, driverarg, dbdata, name, rdclass, dbp); return (result); } static dns_dlzmethods_t sdlzmethods = { dns_sdlzcreate, dns_sdlzdestroy, dns_sdlzfindzone, dns_sdlzallowzonexfr }; /* * Public functions. */ isc_result_t dns_sdlz_putrr(dns_sdlzlookup_t *lookup, const char *type, dns_ttl_t ttl, const char *data) { dns_rdatalist_t *rdatalist; dns_rdata_t *rdata; dns_rdatatype_t typeval; isc_consttextregion_t r; isc_buffer_t b; isc_buffer_t *rdatabuf = NULL; isc_lex_t *lex; isc_result_t result; unsigned int size; isc_mem_t *mctx; dns_name_t *origin; REQUIRE(VALID_SDLZLOOKUP(lookup)); REQUIRE(type != NULL); REQUIRE(data != NULL); mctx = lookup->sdlz->common.mctx; r.base = type; r.length = strlen(type); result = dns_rdatatype_fromtext(&typeval, (void *) &r); if (result != ISC_R_SUCCESS) return (result); rdatalist = ISC_LIST_HEAD(lookup->lists); while (rdatalist != NULL) { if (rdatalist->type == typeval) break; rdatalist = ISC_LIST_NEXT(rdatalist, link); } if (rdatalist == NULL) { rdatalist = isc_mem_get(mctx, sizeof(dns_rdatalist_t)); if (rdatalist == NULL) return (ISC_R_NOMEMORY); rdatalist->rdclass = lookup->sdlz->common.rdclass; rdatalist->type = typeval; rdatalist->covers = 0; rdatalist->ttl = ttl; ISC_LIST_INIT(rdatalist->rdata); ISC_LINK_INIT(rdatalist, link); ISC_LIST_APPEND(lookup->lists, rdatalist, link); } else if (rdatalist->ttl != ttl) return (DNS_R_BADTTL); rdata = isc_mem_get(mctx, sizeof(dns_rdata_t)); if (rdata == NULL) return (ISC_R_NOMEMORY); dns_rdata_init(rdata); if ((lookup->sdlz->dlzimp->flags & DNS_SDLZFLAG_RELATIVERDATA) != 0) origin = &lookup->sdlz->common.origin; else origin = dns_rootname; lex = NULL; result = isc_lex_create(mctx, 64, &lex); if (result != ISC_R_SUCCESS) goto failure; size = initial_size(data); do { isc_buffer_init(&b, data, strlen(data)); isc_buffer_add(&b, strlen(data)); result = isc_lex_openbuffer(lex, &b); if (result != ISC_R_SUCCESS) goto failure; rdatabuf = NULL; result = isc_buffer_allocate(mctx, &rdatabuf, size); if (result != ISC_R_SUCCESS) goto failure; result = dns_rdata_fromtext(rdata, rdatalist->rdclass, rdatalist->type, lex, origin, ISC_FALSE, mctx, rdatabuf, &lookup->callbacks); if (result != ISC_R_SUCCESS) isc_buffer_free(&rdatabuf); size *= 2; } while (result == ISC_R_NOSPACE); if (result != ISC_R_SUCCESS) goto failure; ISC_LIST_APPEND(rdatalist->rdata, rdata, link); ISC_LIST_APPEND(lookup->buffers, rdatabuf, link); if (lex != NULL) isc_lex_destroy(&lex); return (ISC_R_SUCCESS); failure: if (rdatabuf != NULL) isc_buffer_free(&rdatabuf); if (lex != NULL) isc_lex_destroy(&lex); isc_mem_put(mctx, rdata, sizeof(dns_rdata_t)); return (result); } isc_result_t dns_sdlz_putnamedrr(dns_sdlzallnodes_t *allnodes, const char *name, const char *type, dns_ttl_t ttl, const char *data) { dns_name_t *newname, *origin; dns_fixedname_t fnewname; dns_sdlz_db_t *sdlz = (dns_sdlz_db_t *)allnodes->common.db; dns_sdlznode_t *sdlznode; isc_mem_t *mctx = sdlz->common.mctx; isc_buffer_t b; isc_result_t result; dns_fixedname_init(&fnewname); newname = dns_fixedname_name(&fnewname); if ((sdlz->dlzimp->flags & DNS_SDLZFLAG_RELATIVERDATA) != 0) origin = &sdlz->common.origin; else origin = dns_rootname; isc_buffer_init(&b, name, strlen(name)); isc_buffer_add(&b, strlen(name)); result = dns_name_fromtext(newname, &b, origin, ISC_FALSE, NULL); if (result != ISC_R_SUCCESS) return (result); if (allnodes->common.relative_names) { /* All names are relative to the root */ unsigned int nlabels = dns_name_countlabels(newname); dns_name_getlabelsequence(newname, 0, nlabels - 1, newname); } sdlznode = ISC_LIST_HEAD(allnodes->nodelist); if (sdlznode == NULL || !dns_name_equal(sdlznode->name, newname)) { sdlznode = NULL; result = createnode(sdlz, &sdlznode); if (result != ISC_R_SUCCESS) return (result); sdlznode->name = isc_mem_get(mctx, sizeof(dns_name_t)); if (sdlznode->name == NULL) { destroynode(sdlznode); return (ISC_R_NOMEMORY); } dns_name_init(sdlznode->name, NULL); result = dns_name_dup(newname, mctx, sdlznode->name); if (result != ISC_R_SUCCESS) { isc_mem_put(mctx, sdlznode->name, sizeof(dns_name_t)); destroynode(sdlznode); return (result); } ISC_LIST_PREPEND(allnodes->nodelist, sdlznode, link); if (allnodes->origin == NULL && dns_name_equal(newname, &sdlz->common.origin)) allnodes->origin = sdlznode; } return (dns_sdlz_putrr(sdlznode, type, ttl, data)); } isc_result_t dns_sdlz_putsoa(dns_sdlzlookup_t *lookup, const char *mname, const char *rname, isc_uint32_t serial) { char str[2 * DNS_NAME_MAXTEXT + 5 * (sizeof("2147483647")) + 7]; int n; REQUIRE(mname != NULL); REQUIRE(rname != NULL); n = snprintf(str, sizeof str, "%s %s %u %u %u %u %u", mname, rname, serial, SDLZ_DEFAULT_REFRESH, SDLZ_DEFAULT_RETRY, SDLZ_DEFAULT_EXPIRE, SDLZ_DEFAULT_MINIMUM); if (n >= (int)sizeof(str) || n < 0) return (ISC_R_NOSPACE); return (dns_sdlz_putrr(lookup, "SOA", SDLZ_DEFAULT_TTL, str)); } isc_result_t dns_sdlzregister(const char *drivername, const dns_sdlzmethods_t *methods, void *driverarg, unsigned int flags, isc_mem_t *mctx, dns_sdlzimplementation_t **sdlzimp) { dns_sdlzimplementation_t *imp; isc_result_t result; /* * Performs checks to make sure data is as we expect it to be. */ REQUIRE(drivername != NULL); REQUIRE(methods != NULL); REQUIRE(methods->findzone != NULL); REQUIRE(methods->lookup != NULL); REQUIRE(mctx != NULL); REQUIRE(sdlzimp != NULL && *sdlzimp == NULL); REQUIRE((flags & ~(DNS_SDLZFLAG_RELATIVEOWNER | DNS_SDLZFLAG_RELATIVERDATA | DNS_SDLZFLAG_THREADSAFE)) == 0); /* Write debugging message to log */ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2), "Registering SDLZ driver '%s'", drivername); /* * Allocate memory for a sdlz_implementation object. Error if * we cannot. */ imp = isc_mem_get(mctx, sizeof(dns_sdlzimplementation_t)); if (imp == NULL) return (ISC_R_NOMEMORY); /* Make sure memory region is set to all 0's */ memset(imp, 0, sizeof(dns_sdlzimplementation_t)); /* Store the data passed into this method */ imp->methods = methods; imp->driverarg = driverarg; imp->flags = flags; imp->mctx = NULL; /* attach the new sdlz_implementation object to a memory context */ isc_mem_attach(mctx, &imp->mctx); /* * initialize the driver lock, error if we cannot * (used if a driver does not support multiple threads) */ result = isc_mutex_init(&imp->driverlock); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_mutex_init() failed: %s", isc_result_totext(result)); goto cleanup_mctx; } imp->dlz_imp = NULL; /* * register the DLZ driver. Pass in our "extra" sdlz information as * a driverarg. (that's why we stored the passed in driver arg in our * sdlz_implementation structure) Also, store the dlz_implementation * structure in our sdlz_implementation. */ result = dns_dlzregister(drivername, &sdlzmethods, imp, mctx, &imp->dlz_imp); /* if registration fails, cleanup and get outta here. */ if (result != ISC_R_SUCCESS) goto cleanup_mutex; *sdlzimp = imp; return (ISC_R_SUCCESS); cleanup_mutex: /* destroy the driver lock, we don't need it anymore */ DESTROYLOCK(&imp->driverlock); cleanup_mctx: /* * return the memory back to the available memory pool and * remove it from the memory context. */ isc_mem_put(mctx, imp, sizeof(dns_sdlzimplementation_t)); isc_mem_detach(&mctx); return (result); } void dns_sdlzunregister(dns_sdlzimplementation_t **sdlzimp) { dns_sdlzimplementation_t *imp; isc_mem_t *mctx; /* Write debugging message to log */ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE, DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2), "Unregistering SDLZ driver."); /* * Performs checks to make sure data is as we expect it to be. */ REQUIRE(sdlzimp != NULL && *sdlzimp != NULL); imp = *sdlzimp; /* Unregister the DLZ driver implementation */ dns_dlzunregister(&imp->dlz_imp); /* destroy the driver lock, we don't need it anymore */ DESTROYLOCK(&imp->driverlock); mctx = imp->mctx; /* * return the memory back to the available memory pool and * remove it from the memory context. */ isc_mem_put(mctx, imp, sizeof(dns_sdlzimplementation_t)); isc_mem_detach(&mctx); *sdlzimp = NULL; }