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;
isc_boolean_t dolistenon;
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;
clearlistenon(mgr);
}
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;
dolistenon = ISC_TRUE;
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.
*/
(void)dns_acl_match(&listen_netaddr, NULL, le->acl,
&mgr->aclenv, &match, NULL);
if (match <= 0)
continue;
if (adjusting == ISC_FALSE && dolistenon == ISC_TRUE) {
setup_listenon(mgr, &interface, le->port);
dolistenon = ISC_FALSE;
}
/*
* 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)) {
(void)dns_acl_match(&listen_netaddr,
NULL, ele->acl,
NULL, &match, NULL);
if (match > 0 &&
(ele->port == le->port ||
ele->port == 0))
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);
}
int
main(int argc, char **argv) {
isc_mem_t *mctx = NULL;
isc_interfaceiter_t *iter = NULL;
isc_interface_t ifdata;
isc_result_t result;
const char * res;
char buf[128];
UNUSED(argc);
UNUSED(argv);
RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);
result = isc_interfaceiter_create(mctx, &iter);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_interfaceiter_first(iter);
while (result == ISC_R_SUCCESS) {
result = isc_interfaceiter_current(iter, &ifdata);
if (result != ISC_R_SUCCESS) {
fprintf(stdout, "isc_interfaceiter_current: %s",
isc_result_totext(result));
continue;
}
fprintf(stdout, "%s %d %x\n", ifdata.name, ifdata.af,
ifdata.flags);
INSIST(ifdata.af == AF_INET || ifdata.af == AF_INET6);
res = inet_ntop(ifdata.af, &ifdata.address.type, buf,
sizeof(buf));
if (ifdata.address.zone != 0)
fprintf(stdout, "address = %s (zone %u)\n",
res == NULL ? "BAD" : res,
ifdata.address.zone);
else
fprintf(stdout, "address = %s\n",
res == NULL ? "BAD" : res);
INSIST(ifdata.address.family == ifdata.af);
res = inet_ntop(ifdata.af, &ifdata.netmask.type, buf,
sizeof(buf));
fprintf(stdout, "netmask = %s\n", res == NULL ? "BAD" : res);
INSIST(ifdata.netmask.family == ifdata.af);
if ((ifdata.flags & INTERFACE_F_POINTTOPOINT) != 0) {
res = inet_ntop(ifdata.af, &ifdata.dstaddress.type,
buf, sizeof(buf));
fprintf(stdout, "dstaddress = %s\n",
res == NULL ? "BAD" : res);
INSIST(ifdata.dstaddress.family == ifdata.af);
}
result = isc_interfaceiter_next(iter);
if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE) {
fprintf(stdout, "isc_interfaceiter_next: %s",
isc_result_totext(result));
continue;
}
}
isc_interfaceiter_destroy(&iter);
fprintf(stdout, "\nPass 2\n\n");
result = isc_interfaceiter_create(mctx, &iter);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_interfaceiter_first(iter);
while (result == ISC_R_SUCCESS) {
result = isc_interfaceiter_current(iter, &ifdata);
if (result != ISC_R_SUCCESS) {
fprintf(stdout, "isc_interfaceiter_current: %s",
isc_result_totext(result));
continue;
}
fprintf(stdout, "%s %d %x\n", ifdata.name, ifdata.af,
ifdata.flags);
INSIST(ifdata.af == AF_INET || ifdata.af == AF_INET6);
res = inet_ntop(ifdata.af, &ifdata.address.type, buf,
sizeof(buf));
if (ifdata.address.zone != 0)
fprintf(stdout, "address = %s (zone %u)\n",
res == NULL ? "BAD" : res,
ifdata.address.zone);
else
fprintf(stdout, "address = %s\n",
res == NULL ? "BAD" : res);
INSIST(ifdata.address.family == ifdata.af);
res = inet_ntop(ifdata.af, &ifdata.netmask.type, buf,
sizeof(buf));
fprintf(stdout, "netmask = %s\n", res == NULL ? "BAD" : res);
INSIST(ifdata.netmask.family == ifdata.af);
if ((ifdata.flags & INTERFACE_F_POINTTOPOINT) != 0) {
res = inet_ntop(ifdata.af, &ifdata.dstaddress.type,
buf, sizeof(buf));
fprintf(stdout, "dstaddress = %s\n",
res == NULL ? "BAD" : res);
INSIST(ifdata.dstaddress.family == ifdata.af);
}
result = isc_interfaceiter_next(iter);
if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE) {
fprintf(stdout, "isc_interfaceiter_next: %s",
isc_result_totext(result));
continue;
}
}
isc_interfaceiter_destroy(&iter);
cleanup:
isc_mem_destroy(&mctx);
return (0);
}