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freebsd-dev/contrib/bind9/bin/named/interfacemgr.c
Tom Rhodes b1e4bd53e0 Vender import of BIND 9.3.0rc4.
2004-09-19 01:30:24 +00:00

912 lines
24 KiB
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/*
* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2002 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: interfacemgr.c,v 1.59.2.5.8.15 2004/08/10 04:56:23 jinmei Exp $ */
#include <config.h>
#include <isc/interfaceiter.h>
#include <isc/string.h>
#include <isc/task.h>
#include <isc/util.h>
#include <dns/acl.h>
#include <dns/dispatch.h>
#include <named/client.h>
#include <named/log.h>
#include <named/interfacemgr.h>
#define IFMGR_MAGIC ISC_MAGIC('I', 'F', 'M', 'G')
#define NS_INTERFACEMGR_VALID(t) ISC_MAGIC_VALID(t, IFMGR_MAGIC)
#define IFMGR_COMMON_LOGARGS \
ns_g_lctx, NS_LOGCATEGORY_NETWORK, NS_LOGMODULE_INTERFACEMGR
struct ns_interfacemgr {
unsigned int magic; /* Magic number. */
int references;
isc_mutex_t lock;
isc_mem_t * mctx; /* Memory context. */
isc_taskmgr_t * taskmgr; /* Task manager. */
isc_socketmgr_t * socketmgr; /* Socket manager. */
dns_dispatchmgr_t * dispatchmgr;
unsigned int generation; /* Current generation no. */
ns_listenlist_t * listenon4;
ns_listenlist_t * listenon6;
dns_aclenv_t aclenv; /* Localhost/localnets ACLs */
ISC_LIST(ns_interface_t) interfaces; /* List of interfaces. */
};
static void
purge_old_interfaces(ns_interfacemgr_t *mgr);
isc_result_t
ns_interfacemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
isc_socketmgr_t *socketmgr,
dns_dispatchmgr_t *dispatchmgr,
ns_interfacemgr_t **mgrp)
{
isc_result_t result;
ns_interfacemgr_t *mgr;
REQUIRE(mctx != NULL);
REQUIRE(mgrp != NULL);
REQUIRE(*mgrp == NULL);
mgr = isc_mem_get(mctx, sizeof(*mgr));
if (mgr == NULL)
return (ISC_R_NOMEMORY);
result = isc_mutex_init(&mgr->lock);
if (result != ISC_R_SUCCESS)
goto cleanup_mem;
mgr->mctx = mctx;
mgr->taskmgr = taskmgr;
mgr->socketmgr = socketmgr;
mgr->dispatchmgr = dispatchmgr;
mgr->generation = 1;
mgr->listenon4 = NULL;
mgr->listenon6 = NULL;
ISC_LIST_INIT(mgr->interfaces);
/*
* The listen-on lists are initially empty.
*/
result = ns_listenlist_create(mctx, &mgr->listenon4);
if (result != ISC_R_SUCCESS)
goto cleanup_mem;
ns_listenlist_attach(mgr->listenon4, &mgr->listenon6);
result = dns_aclenv_init(mctx, &mgr->aclenv);
if (result != ISC_R_SUCCESS)
goto cleanup_listenon;
mgr->references = 1;
mgr->magic = IFMGR_MAGIC;
*mgrp = mgr;
return (ISC_R_SUCCESS);
cleanup_listenon:
ns_listenlist_detach(&mgr->listenon4);
ns_listenlist_detach(&mgr->listenon6);
cleanup_mem:
isc_mem_put(mctx, mgr, sizeof(*mgr));
return (result);
}
static void
ns_interfacemgr_destroy(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
dns_aclenv_destroy(&mgr->aclenv);
ns_listenlist_detach(&mgr->listenon4);
ns_listenlist_detach(&mgr->listenon6);
DESTROYLOCK(&mgr->lock);
mgr->magic = 0;
isc_mem_put(mgr->mctx, mgr, sizeof(*mgr));
}
dns_aclenv_t *
ns_interfacemgr_getaclenv(ns_interfacemgr_t *mgr) {
return (&mgr->aclenv);
}
void
ns_interfacemgr_attach(ns_interfacemgr_t *source, ns_interfacemgr_t **target) {
REQUIRE(NS_INTERFACEMGR_VALID(source));
LOCK(&source->lock);
INSIST(source->references > 0);
source->references++;
UNLOCK(&source->lock);
*target = source;
}
void
ns_interfacemgr_detach(ns_interfacemgr_t **targetp) {
isc_result_t need_destroy = ISC_FALSE;
ns_interfacemgr_t *target = *targetp;
REQUIRE(target != NULL);
REQUIRE(NS_INTERFACEMGR_VALID(target));
LOCK(&target->lock);
REQUIRE(target->references > 0);
target->references--;
if (target->references == 0)
need_destroy = ISC_TRUE;
UNLOCK(&target->lock);
if (need_destroy)
ns_interfacemgr_destroy(target);
*targetp = NULL;
}
void
ns_interfacemgr_shutdown(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
/*
* Shut down and detach all interfaces.
* By incrementing the generation count, we make purge_old_interfaces()
* consider all interfaces "old".
*/
mgr->generation++;
purge_old_interfaces(mgr);
}
static isc_result_t
ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
const char *name, ns_interface_t **ifpret)
{
ns_interface_t *ifp;
isc_result_t result;
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
ifp = isc_mem_get(mgr->mctx, sizeof(*ifp));
if (ifp == NULL)
return (ISC_R_NOMEMORY);
ifp->mgr = NULL;
ifp->generation = mgr->generation;
ifp->addr = *addr;
strncpy(ifp->name, name, sizeof(ifp->name));
ifp->name[sizeof(ifp->name)-1] = '\0';
ifp->clientmgr = NULL;
result = isc_mutex_init(&ifp->lock);
if (result != ISC_R_SUCCESS)
goto lock_create_failure;
result = ns_clientmgr_create(mgr->mctx, mgr->taskmgr,
ns_g_timermgr,
&ifp->clientmgr);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"ns_clientmgr_create() failed: %s",
isc_result_totext(result));
goto clientmgr_create_failure;
}
ifp->udpdispatch = NULL;
ifp->tcpsocket = NULL;
/*
* Create a single TCP client object. It will replace itself
* with a new one as soon as it gets a connection, so the actual
* connections will be handled in parallel even though there is
* only one client initially.
*/
ifp->ntcptarget = 1;
ifp->ntcpcurrent = 0;
ISC_LINK_INIT(ifp, link);
ns_interfacemgr_attach(mgr, &ifp->mgr);
ISC_LIST_APPEND(mgr->interfaces, ifp, link);
ifp->references = 1;
ifp->magic = IFACE_MAGIC;
*ifpret = ifp;
return (ISC_R_SUCCESS);
clientmgr_create_failure:
DESTROYLOCK(&ifp->lock);
lock_create_failure:
ifp->magic = 0;
isc_mem_put(mgr->mctx, ifp, sizeof(*ifp));
return (ISC_R_UNEXPECTED);
}
static isc_result_t
ns_interface_listenudp(ns_interface_t *ifp) {
isc_result_t result;
unsigned int attrs;
unsigned int attrmask;
attrs = 0;
attrs |= DNS_DISPATCHATTR_UDP;
if (isc_sockaddr_pf(&ifp->addr) == AF_INET)
attrs |= DNS_DISPATCHATTR_IPV4;
else
attrs |= DNS_DISPATCHATTR_IPV6;
attrs |= DNS_DISPATCHATTR_NOLISTEN;
attrmask = 0;
attrmask |= DNS_DISPATCHATTR_UDP | DNS_DISPATCHATTR_TCP;
attrmask |= DNS_DISPATCHATTR_IPV4 | DNS_DISPATCHATTR_IPV6;
result = dns_dispatch_getudp(ifp->mgr->dispatchmgr, ns_g_socketmgr,
ns_g_taskmgr, &ifp->addr,
4096, 1000, 32768, 8219, 8237,
attrs, attrmask, &ifp->udpdispatch);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"could not listen on UDP socket: %s",
isc_result_totext(result));
goto udp_dispatch_failure;
}
result = ns_clientmgr_createclients(ifp->clientmgr, ns_g_cpus,
ifp, ISC_FALSE);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"UDP ns_clientmgr_createclients(): %s",
isc_result_totext(result));
goto addtodispatch_failure;
}
return (ISC_R_SUCCESS);
addtodispatch_failure:
dns_dispatch_changeattributes(ifp->udpdispatch, 0,
DNS_DISPATCHATTR_NOLISTEN);
dns_dispatch_detach(&ifp->udpdispatch);
udp_dispatch_failure:
return (result);
}
static isc_result_t
ns_interface_accepttcp(ns_interface_t *ifp) {
isc_result_t result;
/*
* Open a TCP socket.
*/
result = isc_socket_create(ifp->mgr->socketmgr,
isc_sockaddr_pf(&ifp->addr),
isc_sockettype_tcp,
&ifp->tcpsocket);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"creating TCP socket: %s",
isc_result_totext(result));
goto tcp_socket_failure;
}
#ifndef ISC_ALLOW_MAPPED
isc_socket_ipv6only(ifp->tcpsocket, ISC_TRUE);
#endif
result = isc_socket_bind(ifp->tcpsocket, &ifp->addr);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"binding TCP socket: %s",
isc_result_totext(result));
goto tcp_bind_failure;
}
result = isc_socket_listen(ifp->tcpsocket, ns_g_listen);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"listening on TCP socket: %s",
isc_result_totext(result));
goto tcp_listen_failure;
}
/*
* If/when there a multiple filters listen to the
* result.
*/
(void)isc_socket_filter(ifp->tcpsocket, "dataready");
result = ns_clientmgr_createclients(ifp->clientmgr,
ifp->ntcptarget, ifp,
ISC_TRUE);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"TCP ns_clientmgr_createclients(): %s",
isc_result_totext(result));
goto accepttcp_failure;
}
return (ISC_R_SUCCESS);
accepttcp_failure:
tcp_listen_failure:
tcp_bind_failure:
isc_socket_detach(&ifp->tcpsocket);
tcp_socket_failure:
return (ISC_R_SUCCESS);
}
static isc_result_t
ns_interface_setup(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
const char *name, ns_interface_t **ifpret,
isc_boolean_t accept_tcp)
{
isc_result_t result;
ns_interface_t *ifp = NULL;
REQUIRE(ifpret != NULL && *ifpret == NULL);
result = ns_interface_create(mgr, addr, name, &ifp);
if (result != ISC_R_SUCCESS)
return (result);
result = ns_interface_listenudp(ifp);
if (result != ISC_R_SUCCESS)
goto cleanup_interface;
if (accept_tcp == ISC_TRUE) {
result = ns_interface_accepttcp(ifp);
if (result != ISC_R_SUCCESS) {
/*
* XXXRTH We don't currently have a way to easily stop
* dispatch service, so we currently return
* ISC_R_SUCCESS (the UDP stuff will work even if TCP
* creation failed). This will be fixed later.
*/
result = ISC_R_SUCCESS;
}
}
*ifpret = ifp;
return (ISC_R_SUCCESS);
cleanup_interface:
ISC_LIST_UNLINK(ifp->mgr->interfaces, ifp, link);
ns_interface_detach(&ifp);
return (result);
}
void
ns_interface_shutdown(ns_interface_t *ifp) {
if (ifp->clientmgr != NULL)
ns_clientmgr_destroy(&ifp->clientmgr);
}
static void
ns_interface_destroy(ns_interface_t *ifp) {
isc_mem_t *mctx = ifp->mgr->mctx;
REQUIRE(NS_INTERFACE_VALID(ifp));
ns_interface_shutdown(ifp);
if (ifp->udpdispatch != NULL) {
dns_dispatch_changeattributes(ifp->udpdispatch, 0,
DNS_DISPATCHATTR_NOLISTEN);
dns_dispatch_detach(&ifp->udpdispatch);
}
if (ifp->tcpsocket != NULL)
isc_socket_detach(&ifp->tcpsocket);
DESTROYLOCK(&ifp->lock);
ns_interfacemgr_detach(&ifp->mgr);
ifp->magic = 0;
isc_mem_put(mctx, ifp, sizeof(*ifp));
}
void
ns_interface_attach(ns_interface_t *source, ns_interface_t **target) {
REQUIRE(NS_INTERFACE_VALID(source));
LOCK(&source->lock);
INSIST(source->references > 0);
source->references++;
UNLOCK(&source->lock);
*target = source;
}
void
ns_interface_detach(ns_interface_t **targetp) {
isc_result_t need_destroy = ISC_FALSE;
ns_interface_t *target = *targetp;
REQUIRE(target != NULL);
REQUIRE(NS_INTERFACE_VALID(target));
LOCK(&target->lock);
REQUIRE(target->references > 0);
target->references--;
if (target->references == 0)
need_destroy = ISC_TRUE;
UNLOCK(&target->lock);
if (need_destroy)
ns_interface_destroy(target);
*targetp = NULL;
}
/*
* Search the interface list for an interface whose address and port
* both match those of 'addr'. Return a pointer to it, or NULL if not found.
*/
static ns_interface_t *
find_matching_interface(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr) {
ns_interface_t *ifp;
for (ifp = ISC_LIST_HEAD(mgr->interfaces); ifp != NULL;
ifp = ISC_LIST_NEXT(ifp, link)) {
if (isc_sockaddr_equal(&ifp->addr, addr))
break;
}
return (ifp);
}
/*
* Remove any interfaces whose generation number is not the current one.
*/
static void
purge_old_interfaces(ns_interfacemgr_t *mgr) {
ns_interface_t *ifp, *next;
for (ifp = ISC_LIST_HEAD(mgr->interfaces); ifp != NULL; ifp = next) {
INSIST(NS_INTERFACE_VALID(ifp));
next = ISC_LIST_NEXT(ifp, link);
if (ifp->generation != mgr->generation) {
char sabuf[256];
ISC_LIST_UNLINK(ifp->mgr->interfaces, ifp, link);
isc_sockaddr_format(&ifp->addr, sabuf, sizeof(sabuf));
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_INFO,
"no longer listening on %s", sabuf);
ns_interface_shutdown(ifp);
ns_interface_detach(&ifp);
}
}
}
static isc_result_t
clearacl(isc_mem_t *mctx, dns_acl_t **aclp) {
dns_acl_t *newacl = NULL;
isc_result_t result;
result = dns_acl_create(mctx, 10, &newacl);
if (result != ISC_R_SUCCESS)
return (result);
dns_acl_detach(aclp);
dns_acl_attach(newacl, aclp);
dns_acl_detach(&newacl);
return (ISC_R_SUCCESS);
}
static isc_boolean_t
listenon_is_ip6_any(ns_listenelt_t *elt) {
if (elt->acl->length != 1)
return (ISC_FALSE);
if (elt->acl->elements[0].negative == ISC_FALSE &&
elt->acl->elements[0].type == dns_aclelementtype_any)
return (ISC_TRUE); /* listen-on-v6 { any; } */
return (ISC_FALSE); /* All others */
}
static isc_result_t
setup_locals(ns_interfacemgr_t *mgr, isc_interface_t *interface) {
isc_result_t result;
dns_aclelement_t elt;
unsigned int family;
unsigned int prefixlen;
family = interface->address.family;
elt.type = dns_aclelementtype_ipprefix;
elt.negative = ISC_FALSE;
elt.u.ip_prefix.address = interface->address;
elt.u.ip_prefix.prefixlen = (family == AF_INET) ? 32 : 128;
result = dns_acl_appendelement(mgr->aclenv.localhost, &elt);
if (result != ISC_R_SUCCESS)
return (result);
result = isc_netaddr_masktoprefixlen(&interface->netmask,
&prefixlen);
/* Non contigious netmasks not allowed by IPv6 arch. */
if (result != ISC_R_SUCCESS && family == AF_INET6)
return (result);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_WARNING,
"omitting IPv4 interface %s from "
"localnets ACL: %s",
interface->name,
isc_result_totext(result));
} else {
elt.u.ip_prefix.prefixlen = prefixlen;
if (dns_acl_elementmatch(mgr->aclenv.localnets, &elt,
NULL) == ISC_R_NOTFOUND) {
result = dns_acl_appendelement(mgr->aclenv.localnets,
&elt);
if (result != ISC_R_SUCCESS)
return (result);
}
}
return (ISC_R_SUCCESS);
}
static isc_result_t
do_scan(ns_interfacemgr_t *mgr, ns_listenlist_t *ext_listen,
isc_boolean_t verbose)
{
isc_interfaceiter_t *iter = NULL;
isc_boolean_t scan_ipv4 = ISC_FALSE;
isc_boolean_t scan_ipv6 = ISC_FALSE;
isc_boolean_t adjusting = ISC_FALSE;
isc_boolean_t ipv6only = ISC_TRUE;
isc_boolean_t ipv6pktinfo = ISC_TRUE;
isc_result_t result;
isc_netaddr_t zero_address, zero_address6;
ns_listenelt_t *le;
isc_sockaddr_t listen_addr;
ns_interface_t *ifp;
isc_boolean_t log_explicit = ISC_FALSE;
if (ext_listen != NULL)
adjusting = ISC_TRUE;
if (isc_net_probeipv6() == ISC_R_SUCCESS)
scan_ipv6 = ISC_TRUE;
#ifdef WANT_IPV6
else
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO : ISC_LOG_DEBUG(1),
"no IPv6 interfaces found");
#endif
if (isc_net_probeipv4() == ISC_R_SUCCESS)
scan_ipv4 = ISC_TRUE;
else
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO : ISC_LOG_DEBUG(1),
"no IPv4 interfaces found");
/*
* A special, but typical case; listen-on-v6 { any; }.
* When we can make the socket IPv6-only, open a single wildcard
* socket for IPv6 communication. Otherwise, make separate socket
* for each IPv6 address in order to avoid accepting IPv4 packets
* as the form of mapped addresses unintentionally unless explicitly
* allowed.
*/
#ifndef ISC_ALLOW_MAPPED
if (scan_ipv6 == ISC_TRUE &&
isc_net_probe_ipv6only() != ISC_R_SUCCESS) {
ipv6only = ISC_FALSE;
log_explicit = ISC_TRUE;
}
#endif
if (scan_ipv6 == ISC_TRUE &&
isc_net_probe_ipv6pktinfo() != ISC_R_SUCCESS) {
ipv6pktinfo = ISC_FALSE;
log_explicit = ISC_TRUE;
}
if (scan_ipv6 == ISC_TRUE && ipv6only && ipv6pktinfo) {
for (le = ISC_LIST_HEAD(mgr->listenon6->elts);
le != NULL;
le = ISC_LIST_NEXT(le, link)) {
struct in6_addr in6a;
if (!listenon_is_ip6_any(le))
continue;
in6a = in6addr_any;
isc_sockaddr_fromin6(&listen_addr, &in6a, le->port);
ifp = find_matching_interface(mgr, &listen_addr);
if (ifp != NULL) {
ifp->generation = mgr->generation;
} else {
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_INFO,
"listening on IPv6 "
"interfaces, port %u",
le->port);
result = ns_interface_setup(mgr, &listen_addr,
"<any>", &ifp,
ISC_TRUE);
if (result == ISC_R_SUCCESS)
ifp->flags |= NS_INTERFACEFLAG_ANYADDR;
else
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"listening on all IPv6 "
"interfaces failed");
/* Continue. */
}
}
}
isc_netaddr_any(&zero_address);
isc_netaddr_any6(&zero_address6);
result = isc_interfaceiter_create(mgr->mctx, &iter);
if (result != ISC_R_SUCCESS)
return (result);
if (adjusting == ISC_FALSE) {
result = clearacl(mgr->mctx, &mgr->aclenv.localhost);
if (result != ISC_R_SUCCESS)
goto cleanup_iter;
result = clearacl(mgr->mctx, &mgr->aclenv.localnets);
if (result != ISC_R_SUCCESS)
goto cleanup_iter;
}
for (result = isc_interfaceiter_first(iter);
result == ISC_R_SUCCESS;
result = isc_interfaceiter_next(iter))
{
isc_interface_t interface;
ns_listenlist_t *ll;
unsigned int family;
result = isc_interfaceiter_current(iter, &interface);
if (result != ISC_R_SUCCESS)
break;
family = interface.address.family;
if (family != AF_INET && family != AF_INET6)
continue;
if (scan_ipv4 == ISC_FALSE && family == AF_INET)
continue;
if (scan_ipv6 == ISC_FALSE && family == AF_INET6)
continue;
/*
* Test for the address being nonzero rather than testing
* INTERFACE_F_UP, because on some systems the latter
* follows the media state and we could end up ignoring
* the interface for an entire rescan interval due to
* a temporary media glitch at rescan time.
*/
if (family == AF_INET &&
isc_netaddr_equal(&interface.address, &zero_address)) {
continue;
}
if (family == AF_INET6 &&
isc_netaddr_equal(&interface.address, &zero_address6)) {
continue;
}
if (adjusting == ISC_FALSE) {
result = setup_locals(mgr, &interface);
if (result != ISC_R_SUCCESS)
goto ignore_interface;
}
ll = (family == AF_INET) ? mgr->listenon4 : mgr->listenon6;
for (le = ISC_LIST_HEAD(ll->elts);
le != NULL;
le = ISC_LIST_NEXT(le, link))
{
int match;
isc_boolean_t ipv6_wildcard = ISC_FALSE;
isc_netaddr_t listen_netaddr;
isc_sockaddr_t listen_sockaddr;
/*
* Construct a socket address for this IP/port
* combination.
*/
if (family == AF_INET) {
isc_netaddr_fromin(&listen_netaddr,
&interface.address.type.in);
} else {
isc_netaddr_fromin6(&listen_netaddr,
&interface.address.type.in6);
isc_netaddr_setzone(&listen_netaddr,
interface.address.zone);
}
isc_sockaddr_fromnetaddr(&listen_sockaddr,
&listen_netaddr,
le->port);
/*
* See if the address matches the listen-on statement;
* if not, ignore the interface.
*/
result = dns_acl_match(&listen_netaddr, NULL,
le->acl, &mgr->aclenv,
&match, NULL);
if (match <= 0)
continue;
/*
* The case of "any" IPv6 address will require
* special considerations later, so remember it.
*/
if (family == AF_INET6 && ipv6only && ipv6pktinfo &&
listenon_is_ip6_any(le))
ipv6_wildcard = ISC_TRUE;
/*
* When adjusting interfaces with extra a listening
* list, see if the address matches the extra list.
* If it does, and is also covered by a wildcard
* interface, we need to listen on the address
* explicitly.
*/
if (adjusting == ISC_TRUE) {
ns_listenelt_t *ele;
match = 0;
for (ele = ISC_LIST_HEAD(ext_listen->elts);
ele != NULL;
ele = ISC_LIST_NEXT(ele, link)) {
dns_acl_match(&listen_netaddr, NULL,
ele->acl, NULL,
&match, NULL);
if (match > 0 && ele->port == le->port)
break;
else
match = 0;
}
if (ipv6_wildcard == ISC_TRUE && match == 0)
continue;
}
ifp = find_matching_interface(mgr, &listen_sockaddr);
if (ifp != NULL) {
ifp->generation = mgr->generation;
} else {
char sabuf[ISC_SOCKADDR_FORMATSIZE];
if (adjusting == ISC_FALSE &&
ipv6_wildcard == ISC_TRUE)
continue;
if (log_explicit && family == AF_INET6 &&
!adjusting && listenon_is_ip6_any(le)) {
isc_log_write(IFMGR_COMMON_LOGARGS,
verbose ? ISC_LOG_INFO :
ISC_LOG_DEBUG(1),
"IPv6 socket API is "
"incomplete; explicitly "
"binding to each IPv6 "
"address separately");
log_explicit = ISC_FALSE;
}
isc_sockaddr_format(&listen_sockaddr,
sabuf, sizeof(sabuf));
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_INFO,
"%s"
"listening on %s interface "
"%s, %s",
(adjusting == ISC_TRUE) ?
"additionally " : "",
(family == AF_INET) ?
"IPv4" : "IPv6",
interface.name, sabuf);
result = ns_interface_setup(mgr,
&listen_sockaddr,
interface.name,
&ifp,
(adjusting == ISC_TRUE) ?
ISC_FALSE :
ISC_TRUE);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"creating %s interface "
"%s failed; interface "
"ignored",
(family == AF_INET) ?
"IPv4" : "IPv6",
interface.name);
}
/* Continue. */
}
}
continue;
ignore_interface:
isc_log_write(IFMGR_COMMON_LOGARGS,
ISC_LOG_ERROR,
"ignoring %s interface %s: %s",
(family == AF_INET) ? "IPv4" : "IPv6",
interface.name, isc_result_totext(result));
continue;
}
if (result != ISC_R_NOMORE)
UNEXPECTED_ERROR(__FILE__, __LINE__,
"interface iteration failed: %s",
isc_result_totext(result));
else
result = ISC_R_SUCCESS;
cleanup_iter:
isc_interfaceiter_destroy(&iter);
return (result);
}
static void
ns_interfacemgr_scan0(ns_interfacemgr_t *mgr, ns_listenlist_t *ext_listen,
isc_boolean_t verbose)
{
isc_boolean_t purge = ISC_TRUE;
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
mgr->generation++; /* Increment the generation count. */
if (do_scan(mgr, ext_listen, verbose) != ISC_R_SUCCESS)
purge = ISC_FALSE;
/*
* Now go through the interface list and delete anything that
* does not have the current generation number. This is
* how we catch interfaces that go away or change their
* addresses.
*/
if (purge)
purge_old_interfaces(mgr);
/*
* Warn if we are not listening on any interface, unless
* we're in lwresd-only mode, in which case that is to
* be expected.
*/
if (ext_listen == NULL &&
ISC_LIST_EMPTY(mgr->interfaces) && ! ns_g_lwresdonly) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_WARNING,
"not listening on any interfaces");
}
}
void
ns_interfacemgr_scan(ns_interfacemgr_t *mgr, isc_boolean_t verbose) {
ns_interfacemgr_scan0(mgr, NULL, verbose);
}
void
ns_interfacemgr_adjust(ns_interfacemgr_t *mgr, ns_listenlist_t *list,
isc_boolean_t verbose)
{
ns_interfacemgr_scan0(mgr, list, verbose);
}
void
ns_interfacemgr_setlistenon4(ns_interfacemgr_t *mgr, ns_listenlist_t *value) {
LOCK(&mgr->lock);
ns_listenlist_detach(&mgr->listenon4);
ns_listenlist_attach(value, &mgr->listenon4);
UNLOCK(&mgr->lock);
}
void
ns_interfacemgr_setlistenon6(ns_interfacemgr_t *mgr, ns_listenlist_t *value) {
LOCK(&mgr->lock);
ns_listenlist_detach(&mgr->listenon6);
ns_listenlist_attach(value, &mgr->listenon6);
UNLOCK(&mgr->lock);
}
void
ns_interfacemgr_dumprecursing(FILE *f, ns_interfacemgr_t *mgr) {
ns_interface_t *interface;
LOCK(&mgr->lock);
interface = ISC_LIST_HEAD(mgr->interfaces);
while (interface != NULL) {
if (interface->clientmgr != NULL)
ns_client_dumprecursing(f, interface->clientmgr);
interface = ISC_LIST_NEXT(interface, link);
}
UNLOCK(&mgr->lock);
}
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