diff options
Diffstat (limited to 'lib/dns/peer.c')
| -rw-r--r-- | lib/dns/peer.c | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/lib/dns/peer.c b/lib/dns/peer.c new file mode 100644 index 0000000..12474cb --- /dev/null +++ b/lib/dns/peer.c @@ -0,0 +1,712 @@ +/* + * Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2000, 2001, 2003 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. + */ + +/* $Id: peer.c,v 1.31 2008/04/03 06:09:04 tbox Exp $ */ + +/*! \file */ + +#include <config.h> + +#include <isc/mem.h> +#include <isc/string.h> +#include <isc/util.h> +#include <isc/sockaddr.h> + +#include <dns/bit.h> +#include <dns/fixedname.h> +#include <dns/name.h> +#include <dns/peer.h> + +/*% + * Bit positions in the dns_peer_t structure flags field + */ +#define BOGUS_BIT 0 +#define SERVER_TRANSFER_FORMAT_BIT 1 +#define TRANSFERS_BIT 2 +#define PROVIDE_IXFR_BIT 3 +#define REQUEST_IXFR_BIT 4 +#define SUPPORT_EDNS_BIT 5 +#define SERVER_UDPSIZE_BIT 6 +#define SERVER_MAXUDP_BIT 7 +#define REQUEST_NSID_BIT 8 + +static void +peerlist_delete(dns_peerlist_t **list); + +static void +peer_delete(dns_peer_t **peer); + +isc_result_t +dns_peerlist_new(isc_mem_t *mem, dns_peerlist_t **list) { + dns_peerlist_t *l; + + REQUIRE(list != NULL); + + l = isc_mem_get(mem, sizeof(*l)); + if (l == NULL) + return (ISC_R_NOMEMORY); + + ISC_LIST_INIT(l->elements); + l->mem = mem; + l->refs = 1; + l->magic = DNS_PEERLIST_MAGIC; + + *list = l; + + return (ISC_R_SUCCESS); +} + +void +dns_peerlist_attach(dns_peerlist_t *source, dns_peerlist_t **target) { + REQUIRE(DNS_PEERLIST_VALID(source)); + REQUIRE(target != NULL); + REQUIRE(*target == NULL); + + source->refs++; + + ENSURE(source->refs != 0xffffffffU); + + *target = source; +} + +void +dns_peerlist_detach(dns_peerlist_t **list) { + dns_peerlist_t *plist; + + REQUIRE(list != NULL); + REQUIRE(*list != NULL); + REQUIRE(DNS_PEERLIST_VALID(*list)); + + plist = *list; + *list = NULL; + + REQUIRE(plist->refs > 0); + + plist->refs--; + + if (plist->refs == 0) + peerlist_delete(&plist); +} + +static void +peerlist_delete(dns_peerlist_t **list) { + dns_peerlist_t *l; + dns_peer_t *server, *stmp; + + REQUIRE(list != NULL); + REQUIRE(DNS_PEERLIST_VALID(*list)); + + l = *list; + + REQUIRE(l->refs == 0); + + server = ISC_LIST_HEAD(l->elements); + while (server != NULL) { + stmp = ISC_LIST_NEXT(server, next); + ISC_LIST_UNLINK(l->elements, server, next); + dns_peer_detach(&server); + server = stmp; + } + + l->magic = 0; + isc_mem_put(l->mem, l, sizeof(*l)); + + *list = NULL; +} + +void +dns_peerlist_addpeer(dns_peerlist_t *peers, dns_peer_t *peer) { + dns_peer_t *p = NULL; + + dns_peer_attach(peer, &p); + + /* + * More specifics to front of list. + */ + for (p = ISC_LIST_HEAD(peers->elements); + p != NULL; + p = ISC_LIST_NEXT(p, next)) + if (p->prefixlen < peer->prefixlen) + break; + + if (p != NULL) + ISC_LIST_INSERTBEFORE(peers->elements, p, peer, next); + else + ISC_LIST_APPEND(peers->elements, peer, next); + +} + +isc_result_t +dns_peerlist_peerbyaddr(dns_peerlist_t *servers, + isc_netaddr_t *addr, dns_peer_t **retval) +{ + dns_peer_t *server; + isc_result_t res; + + REQUIRE(retval != NULL); + REQUIRE(DNS_PEERLIST_VALID(servers)); + + server = ISC_LIST_HEAD(servers->elements); + while (server != NULL) { + if (isc_netaddr_eqprefix(addr, &server->address, + server->prefixlen)) + break; + + server = ISC_LIST_NEXT(server, next); + } + + if (server != NULL) { + *retval = server; + res = ISC_R_SUCCESS; + } else { + res = ISC_R_NOTFOUND; + } + + return (res); +} + + + +isc_result_t +dns_peerlist_currpeer(dns_peerlist_t *peers, dns_peer_t **retval) { + dns_peer_t *p = NULL; + + p = ISC_LIST_TAIL(peers->elements); + + dns_peer_attach(p, retval); + + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_new(isc_mem_t *mem, isc_netaddr_t *addr, dns_peer_t **peerptr) { + unsigned int prefixlen = 0; + + REQUIRE(peerptr != NULL); + switch(addr->family) { + case AF_INET: + prefixlen = 32; + break; + case AF_INET6: + prefixlen = 128; + break; + default: + INSIST(0); + } + + return (dns_peer_newprefix(mem, addr, prefixlen, peerptr)); +} + +isc_result_t +dns_peer_newprefix(isc_mem_t *mem, isc_netaddr_t *addr, unsigned int prefixlen, + dns_peer_t **peerptr) +{ + dns_peer_t *peer; + + REQUIRE(peerptr != NULL); + + peer = isc_mem_get(mem, sizeof(*peer)); + if (peer == NULL) + return (ISC_R_NOMEMORY); + + peer->magic = DNS_PEER_MAGIC; + peer->address = *addr; + peer->prefixlen = prefixlen; + peer->mem = mem; + peer->bogus = ISC_FALSE; + peer->transfer_format = dns_one_answer; + peer->transfers = 0; + peer->request_ixfr = ISC_FALSE; + peer->provide_ixfr = ISC_FALSE; + peer->key = NULL; + peer->refs = 1; + peer->transfer_source = NULL; + peer->notify_source = NULL; + peer->query_source = NULL; + + memset(&peer->bitflags, 0x0, sizeof(peer->bitflags)); + + ISC_LINK_INIT(peer, next); + + *peerptr = peer; + + return (ISC_R_SUCCESS); +} + +void +dns_peer_attach(dns_peer_t *source, dns_peer_t **target) { + REQUIRE(DNS_PEER_VALID(source)); + REQUIRE(target != NULL); + REQUIRE(*target == NULL); + + source->refs++; + + ENSURE(source->refs != 0xffffffffU); + + *target = source; +} + +void +dns_peer_detach(dns_peer_t **peer) { + dns_peer_t *p; + + REQUIRE(peer != NULL); + REQUIRE(*peer != NULL); + REQUIRE(DNS_PEER_VALID(*peer)); + + p = *peer; + + REQUIRE(p->refs > 0); + + *peer = NULL; + p->refs--; + + if (p->refs == 0) + peer_delete(&p); +} + +static void +peer_delete(dns_peer_t **peer) { + dns_peer_t *p; + isc_mem_t *mem; + + REQUIRE(peer != NULL); + REQUIRE(DNS_PEER_VALID(*peer)); + + p = *peer; + + REQUIRE(p->refs == 0); + + mem = p->mem; + p->mem = NULL; + p->magic = 0; + + if (p->key != NULL) { + dns_name_free(p->key, mem); + isc_mem_put(mem, p->key, sizeof(dns_name_t)); + } + + if (p->transfer_source != NULL) { + isc_mem_put(mem, p->transfer_source, + sizeof(*p->transfer_source)); + } + + isc_mem_put(mem, p, sizeof(*p)); + + *peer = NULL; +} + +isc_result_t +dns_peer_setbogus(dns_peer_t *peer, isc_boolean_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(BOGUS_BIT, &peer->bitflags); + + peer->bogus = newval; + DNS_BIT_SET(BOGUS_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getbogus(dns_peer_t *peer, isc_boolean_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(BOGUS_BIT, &peer->bitflags)) { + *retval = peer->bogus; + return (ISC_R_SUCCESS); + } else + return (ISC_R_NOTFOUND); +} + + +isc_result_t +dns_peer_setprovideixfr(dns_peer_t *peer, isc_boolean_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(PROVIDE_IXFR_BIT, &peer->bitflags); + + peer->provide_ixfr = newval; + DNS_BIT_SET(PROVIDE_IXFR_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getprovideixfr(dns_peer_t *peer, isc_boolean_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(PROVIDE_IXFR_BIT, &peer->bitflags)) { + *retval = peer->provide_ixfr; + return (ISC_R_SUCCESS); + } else { + return (ISC_R_NOTFOUND); + } +} + +isc_result_t +dns_peer_setrequestixfr(dns_peer_t *peer, isc_boolean_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(REQUEST_IXFR_BIT, &peer->bitflags); + + peer->request_ixfr = newval; + DNS_BIT_SET(REQUEST_IXFR_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getrequestixfr(dns_peer_t *peer, isc_boolean_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(REQUEST_IXFR_BIT, &peer->bitflags)) { + *retval = peer->request_ixfr; + return (ISC_R_SUCCESS); + } else + return (ISC_R_NOTFOUND); +} + +isc_result_t +dns_peer_setsupportedns(dns_peer_t *peer, isc_boolean_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(SUPPORT_EDNS_BIT, &peer->bitflags); + + peer->support_edns = newval; + DNS_BIT_SET(SUPPORT_EDNS_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getsupportedns(dns_peer_t *peer, isc_boolean_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(SUPPORT_EDNS_BIT, &peer->bitflags)) { + *retval = peer->support_edns; + return (ISC_R_SUCCESS); + } else + return (ISC_R_NOTFOUND); +} + +isc_result_t +dns_peer_setrequestnsid(dns_peer_t *peer, isc_boolean_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(REQUEST_NSID_BIT, &peer->bitflags); + + peer->request_nsid = newval; + DNS_BIT_SET(REQUEST_NSID_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getrequestnsid(dns_peer_t *peer, isc_boolean_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(REQUEST_NSID_BIT, &peer->bitflags)) { + *retval = peer->request_nsid; + return (ISC_R_SUCCESS); + } else + return (ISC_R_NOTFOUND); +} + +isc_result_t +dns_peer_settransfers(dns_peer_t *peer, isc_uint32_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(TRANSFERS_BIT, &peer->bitflags); + + peer->transfers = newval; + DNS_BIT_SET(TRANSFERS_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_gettransfers(dns_peer_t *peer, isc_uint32_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(TRANSFERS_BIT, &peer->bitflags)) { + *retval = peer->transfers; + return (ISC_R_SUCCESS); + } else { + return (ISC_R_NOTFOUND); + } +} + +isc_result_t +dns_peer_settransferformat(dns_peer_t *peer, dns_transfer_format_t newval) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(SERVER_TRANSFER_FORMAT_BIT, + &peer->bitflags); + + peer->transfer_format = newval; + DNS_BIT_SET(SERVER_TRANSFER_FORMAT_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_gettransferformat(dns_peer_t *peer, dns_transfer_format_t *retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (DNS_BIT_CHECK(SERVER_TRANSFER_FORMAT_BIT, &peer->bitflags)) { + *retval = peer->transfer_format; + return (ISC_R_SUCCESS); + } else { + return (ISC_R_NOTFOUND); + } +} + +isc_result_t +dns_peer_getkey(dns_peer_t *peer, dns_name_t **retval) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(retval != NULL); + + if (peer->key != NULL) { + *retval = peer->key; + } + + return (peer->key == NULL ? ISC_R_NOTFOUND : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_setkey(dns_peer_t *peer, dns_name_t **keyval) { + isc_boolean_t exists = ISC_FALSE; + + if (peer->key != NULL) { + dns_name_free(peer->key, peer->mem); + isc_mem_put(peer->mem, peer->key, sizeof(dns_name_t)); + exists = ISC_TRUE; + } + + peer->key = *keyval; + *keyval = NULL; + + return (exists ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_setkeybycharp(dns_peer_t *peer, const char *keyval) { + isc_buffer_t b; + dns_fixedname_t fname; + dns_name_t *name; + isc_result_t result; + + dns_fixedname_init(&fname); + isc_buffer_init(&b, keyval, strlen(keyval)); + isc_buffer_add(&b, strlen(keyval)); + result = dns_name_fromtext(dns_fixedname_name(&fname), &b, + dns_rootname, ISC_FALSE, NULL); + if (result != ISC_R_SUCCESS) + return (result); + + name = isc_mem_get(peer->mem, sizeof(dns_name_t)); + if (name == NULL) + return (ISC_R_NOMEMORY); + + dns_name_init(name, NULL); + result = dns_name_dup(dns_fixedname_name(&fname), peer->mem, name); + if (result != ISC_R_SUCCESS) { + isc_mem_put(peer->mem, name, sizeof(dns_name_t)); + return (result); + } + + result = dns_peer_setkey(peer, &name); + if (result != ISC_R_SUCCESS) + isc_mem_put(peer->mem, name, sizeof(dns_name_t)); + + return (result); +} + +isc_result_t +dns_peer_settransfersource(dns_peer_t *peer, + const isc_sockaddr_t *transfer_source) +{ + REQUIRE(DNS_PEER_VALID(peer)); + + if (peer->transfer_source != NULL) { + isc_mem_put(peer->mem, peer->transfer_source, + sizeof(*peer->transfer_source)); + peer->transfer_source = NULL; + } + if (transfer_source != NULL) { + peer->transfer_source = isc_mem_get(peer->mem, + sizeof(*peer->transfer_source)); + if (peer->transfer_source == NULL) + return (ISC_R_NOMEMORY); + + *peer->transfer_source = *transfer_source; + } + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_gettransfersource(dns_peer_t *peer, isc_sockaddr_t *transfer_source) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(transfer_source != NULL); + + if (peer->transfer_source == NULL) + return (ISC_R_NOTFOUND); + *transfer_source = *peer->transfer_source; + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_setnotifysource(dns_peer_t *peer, + const isc_sockaddr_t *notify_source) +{ + REQUIRE(DNS_PEER_VALID(peer)); + + if (peer->notify_source != NULL) { + isc_mem_put(peer->mem, peer->notify_source, + sizeof(*peer->notify_source)); + peer->notify_source = NULL; + } + if (notify_source != NULL) { + peer->notify_source = isc_mem_get(peer->mem, + sizeof(*peer->notify_source)); + if (peer->notify_source == NULL) + return (ISC_R_NOMEMORY); + + *peer->notify_source = *notify_source; + } + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getnotifysource(dns_peer_t *peer, isc_sockaddr_t *notify_source) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(notify_source != NULL); + + if (peer->notify_source == NULL) + return (ISC_R_NOTFOUND); + *notify_source = *peer->notify_source; + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_setquerysource(dns_peer_t *peer, const isc_sockaddr_t *query_source) { + REQUIRE(DNS_PEER_VALID(peer)); + + if (peer->query_source != NULL) { + isc_mem_put(peer->mem, peer->query_source, + sizeof(*peer->query_source)); + peer->query_source = NULL; + } + if (query_source != NULL) { + peer->query_source = isc_mem_get(peer->mem, + sizeof(*peer->query_source)); + if (peer->query_source == NULL) + return (ISC_R_NOMEMORY); + + *peer->query_source = *query_source; + } + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getquerysource(dns_peer_t *peer, isc_sockaddr_t *query_source) { + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(query_source != NULL); + + if (peer->query_source == NULL) + return (ISC_R_NOTFOUND); + *query_source = *peer->query_source; + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_setudpsize(dns_peer_t *peer, isc_uint16_t udpsize) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(SERVER_UDPSIZE_BIT, &peer->bitflags); + + peer->udpsize = udpsize; + DNS_BIT_SET(SERVER_UDPSIZE_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getudpsize(dns_peer_t *peer, isc_uint16_t *udpsize) { + + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(udpsize != NULL); + + if (DNS_BIT_CHECK(SERVER_UDPSIZE_BIT, &peer->bitflags)) { + *udpsize = peer->udpsize; + return (ISC_R_SUCCESS); + } else { + return (ISC_R_NOTFOUND); + } +} + +isc_result_t +dns_peer_setmaxudp(dns_peer_t *peer, isc_uint16_t maxudp) { + isc_boolean_t existed; + + REQUIRE(DNS_PEER_VALID(peer)); + + existed = DNS_BIT_CHECK(SERVER_MAXUDP_BIT, &peer->bitflags); + + peer->maxudp = maxudp; + DNS_BIT_SET(SERVER_MAXUDP_BIT, &peer->bitflags); + + return (existed ? ISC_R_EXISTS : ISC_R_SUCCESS); +} + +isc_result_t +dns_peer_getmaxudp(dns_peer_t *peer, isc_uint16_t *maxudp) { + + REQUIRE(DNS_PEER_VALID(peer)); + REQUIRE(maxudp != NULL); + + if (DNS_BIT_CHECK(SERVER_MAXUDP_BIT, &peer->bitflags)) { + *maxudp = peer->maxudp; + return (ISC_R_SUCCESS); + } else { + return (ISC_R_NOTFOUND); + } +} |