diff options
Diffstat (limited to 'contrib/bind9/lib/dns/byaddr.c')
| -rw-r--r-- | contrib/bind9/lib/dns/byaddr.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/contrib/bind9/lib/dns/byaddr.c b/contrib/bind9/lib/dns/byaddr.c deleted file mode 100644 index 38d6e8b..0000000 --- a/contrib/bind9/lib/dns/byaddr.c +++ /dev/null @@ -1,316 +0,0 @@ -/* - * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC") - * Copyright (C) 2000-2003 Internet Software Consortium. - * - * 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 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. - */ - -/* $Id: byaddr.c,v 1.34.18.3 2005/04/29 00:15:49 marka Exp $ */ - -/*! \file */ - -#include <config.h> - -#include <isc/mem.h> -#include <isc/netaddr.h> -#include <isc/print.h> -#include <isc/string.h> /* Required for HP/UX (and others?) */ -#include <isc/task.h> -#include <isc/util.h> - -#include <dns/byaddr.h> -#include <dns/db.h> -#include <dns/events.h> -#include <dns/lookup.h> -#include <dns/rdata.h> -#include <dns/rdataset.h> -#include <dns/rdatastruct.h> -#include <dns/resolver.h> -#include <dns/result.h> -#include <dns/view.h> - -/* - * XXXRTH We could use a static event... - */ - -struct dns_byaddr { - /* Unlocked. */ - unsigned int magic; - isc_mem_t * mctx; - isc_mutex_t lock; - dns_fixedname_t name; - /* Locked by lock. */ - unsigned int options; - dns_lookup_t * lookup; - isc_task_t * task; - dns_byaddrevent_t * event; - isc_boolean_t canceled; -}; - -#define BYADDR_MAGIC ISC_MAGIC('B', 'y', 'A', 'd') -#define VALID_BYADDR(b) ISC_MAGIC_VALID(b, BYADDR_MAGIC) - -#define MAX_RESTARTS 16 - -static char hex_digits[] = { - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' -}; - -isc_result_t -dns_byaddr_createptrname(isc_netaddr_t *address, isc_boolean_t nibble, - dns_name_t *name) -{ - /* - * We dropped bitstring labels, so all lookups will use nibbles. - */ - UNUSED(nibble); - - return (dns_byaddr_createptrname2(address, - DNS_BYADDROPT_IPV6INT, name)); -} - -isc_result_t -dns_byaddr_createptrname2(isc_netaddr_t *address, unsigned int options, - dns_name_t *name) -{ - char textname[128]; - unsigned char *bytes; - int i; - char *cp; - isc_buffer_t buffer; - unsigned int len; - - REQUIRE(address != NULL); - - /* - * We create the text representation and then convert to a - * dns_name_t. This is not maximally efficient, but it keeps all - * of the knowledge of wire format in the dns_name_ routines. - */ - - bytes = (unsigned char *)(&address->type); - if (address->family == AF_INET) { - (void)snprintf(textname, sizeof(textname), - "%u.%u.%u.%u.in-addr.arpa.", - (bytes[3] & 0xff), - (bytes[2] & 0xff), - (bytes[1] & 0xff), - (bytes[0] & 0xff)); - } else if (address->family == AF_INET6) { - cp = textname; - for (i = 15; i >= 0; i--) { - *cp++ = hex_digits[bytes[i] & 0x0f]; - *cp++ = '.'; - *cp++ = hex_digits[(bytes[i] >> 4) & 0x0f]; - *cp++ = '.'; - } - if ((options & DNS_BYADDROPT_IPV6INT) != 0) - strcpy(cp, "ip6.int."); - else - strcpy(cp, "ip6.arpa."); - } else - return (ISC_R_NOTIMPLEMENTED); - - len = (unsigned int)strlen(textname); - isc_buffer_init(&buffer, textname, len); - isc_buffer_add(&buffer, len); - return (dns_name_fromtext(name, &buffer, dns_rootname, - ISC_FALSE, NULL)); -} - -static inline isc_result_t -copy_ptr_targets(dns_byaddr_t *byaddr, dns_rdataset_t *rdataset) { - isc_result_t result; - dns_name_t *name; - dns_rdata_t rdata = DNS_RDATA_INIT; - - /* - * The caller must be holding the byaddr's lock. - */ - - result = dns_rdataset_first(rdataset); - while (result == ISC_R_SUCCESS) { - dns_rdata_ptr_t ptr; - dns_rdataset_current(rdataset, &rdata); - result = dns_rdata_tostruct(&rdata, &ptr, NULL); - if (result != ISC_R_SUCCESS) - return (result); - name = isc_mem_get(byaddr->mctx, sizeof(*name)); - if (name == NULL) { - dns_rdata_freestruct(&ptr); - return (ISC_R_NOMEMORY); - } - dns_name_init(name, NULL); - result = dns_name_dup(&ptr.ptr, byaddr->mctx, name); - dns_rdata_freestruct(&ptr); - if (result != ISC_R_SUCCESS) { - isc_mem_put(byaddr->mctx, name, sizeof(*name)); - return (ISC_R_NOMEMORY); - } - ISC_LIST_APPEND(byaddr->event->names, name, link); - dns_rdata_reset(&rdata); - result = dns_rdataset_next(rdataset); - } - if (result == ISC_R_NOMORE) - result = ISC_R_SUCCESS; - - return (result); -} - -static void -lookup_done(isc_task_t *task, isc_event_t *event) { - dns_byaddr_t *byaddr = event->ev_arg; - dns_lookupevent_t *levent; - isc_result_t result; - - REQUIRE(event->ev_type == DNS_EVENT_LOOKUPDONE); - REQUIRE(VALID_BYADDR(byaddr)); - REQUIRE(byaddr->task == task); - - UNUSED(task); - - levent = (dns_lookupevent_t *)event; - - if (levent->result == ISC_R_SUCCESS) { - result = copy_ptr_targets(byaddr, levent->rdataset); - byaddr->event->result = result; - } else - byaddr->event->result = levent->result; - isc_event_free(&event); - isc_task_sendanddetach(&byaddr->task, (isc_event_t **)&byaddr->event); -} - -static void -bevent_destroy(isc_event_t *event) { - dns_byaddrevent_t *bevent; - dns_name_t *name, *next_name; - isc_mem_t *mctx; - - REQUIRE(event->ev_type == DNS_EVENT_BYADDRDONE); - mctx = event->ev_destroy_arg; - bevent = (dns_byaddrevent_t *)event; - - for (name = ISC_LIST_HEAD(bevent->names); - name != NULL; - name = next_name) { - next_name = ISC_LIST_NEXT(name, link); - ISC_LIST_UNLINK(bevent->names, name, link); - dns_name_free(name, mctx); - isc_mem_put(mctx, name, sizeof(*name)); - } - isc_mem_put(mctx, event, event->ev_size); -} - -isc_result_t -dns_byaddr_create(isc_mem_t *mctx, isc_netaddr_t *address, dns_view_t *view, - unsigned int options, isc_task_t *task, - isc_taskaction_t action, void *arg, dns_byaddr_t **byaddrp) -{ - isc_result_t result; - dns_byaddr_t *byaddr; - isc_event_t *ievent; - - byaddr = isc_mem_get(mctx, sizeof(*byaddr)); - if (byaddr == NULL) - return (ISC_R_NOMEMORY); - byaddr->mctx = mctx; - byaddr->options = options; - - byaddr->event = isc_mem_get(mctx, sizeof(*byaddr->event)); - if (byaddr->event == NULL) { - result = ISC_R_NOMEMORY; - goto cleanup_byaddr; - } - ISC_EVENT_INIT(byaddr->event, sizeof(*byaddr->event), 0, NULL, - DNS_EVENT_BYADDRDONE, action, arg, byaddr, - bevent_destroy, mctx); - byaddr->event->result = ISC_R_FAILURE; - ISC_LIST_INIT(byaddr->event->names); - - byaddr->task = NULL; - isc_task_attach(task, &byaddr->task); - - result = isc_mutex_init(&byaddr->lock); - if (result != ISC_R_SUCCESS) - goto cleanup_event; - - dns_fixedname_init(&byaddr->name); - - result = dns_byaddr_createptrname2(address, options, - dns_fixedname_name(&byaddr->name)); - if (result != ISC_R_SUCCESS) - goto cleanup_lock; - - byaddr->lookup = NULL; - result = dns_lookup_create(mctx, dns_fixedname_name(&byaddr->name), - dns_rdatatype_ptr, view, 0, task, - lookup_done, byaddr, &byaddr->lookup); - if (result != ISC_R_SUCCESS) - goto cleanup_lock; - - byaddr->canceled = ISC_FALSE; - byaddr->magic = BYADDR_MAGIC; - - *byaddrp = byaddr; - - return (ISC_R_SUCCESS); - - cleanup_lock: - DESTROYLOCK(&byaddr->lock); - - cleanup_event: - ievent = (isc_event_t *)byaddr->event; - isc_event_free(&ievent); - byaddr->event = NULL; - - isc_task_detach(&byaddr->task); - - cleanup_byaddr: - isc_mem_put(mctx, byaddr, sizeof(*byaddr)); - - return (result); -} - -void -dns_byaddr_cancel(dns_byaddr_t *byaddr) { - REQUIRE(VALID_BYADDR(byaddr)); - - LOCK(&byaddr->lock); - - if (!byaddr->canceled) { - byaddr->canceled = ISC_TRUE; - if (byaddr->lookup != NULL) - dns_lookup_cancel(byaddr->lookup); - } - - UNLOCK(&byaddr->lock); -} - -void -dns_byaddr_destroy(dns_byaddr_t **byaddrp) { - dns_byaddr_t *byaddr; - - REQUIRE(byaddrp != NULL); - byaddr = *byaddrp; - REQUIRE(VALID_BYADDR(byaddr)); - REQUIRE(byaddr->event == NULL); - REQUIRE(byaddr->task == NULL); - dns_lookup_destroy(&byaddr->lookup); - - DESTROYLOCK(&byaddr->lock); - byaddr->magic = 0; - isc_mem_put(byaddr->mctx, byaddr, sizeof(*byaddr)); - - *byaddrp = NULL; -} |
